Bump version to 3.3.0

Update from Weblate

.travis.sh

@@ -14,18 +14,18 @@ if [ "$PRETIX_CONFIG_FILE" == "tests/travis_postgres.cfg" ]; then
 fi
 
 if [ "$1" == "style" ]; then
-	XDG_CACHE_HOME=/cache pip3 install -Ur src/requirements.txt -r src/requirements/dev.txt
+	XDG_CACHE_HOME=/cache pip3 install --no-use-pep517 -Ur src/requirements.txt -r src/requirements/dev.txt
 	cd src
     flake8 .
     isort -c -rc -df .
 fi
 if [ "$1" == "doctests" ]; then
-	XDG_CACHE_HOME=/cache pip3 install -Ur doc/requirements.txt
+	XDG_CACHE_HOME=/cache pip3 install --no-use-pep517 -Ur doc/requirements.txt
 	cd doc
 	make doctest
 fi
 if [ "$1" == "doc-spelling" ]; then
-	XDG_CACHE_HOME=/cache pip3 install -Ur doc/requirements.txt
+	XDG_CACHE_HOME=/cache pip3 install --no-use-pep517 -Ur doc/requirements.txt
 	cd doc
 	make spelling
 	if [ -s _build/spelling/output.txt ]; then
@@ -33,26 +33,26 @@ if [ "$1" == "doc-spelling" ]; then
 	fi
 fi
 if [ "$1" == "translation-spelling" ]; then
-	XDG_CACHE_HOME=/cache pip3 install -Ur src/requirements/dev.txt
+	XDG_CACHE_HOME=/cache pip3 install --no-use-pep517 -Ur src/requirements/dev.txt
 	cd src
 	potypo
 fi
 if [ "$1" == "tests" ]; then
-	pip3 install -r src/requirements.txt -Ur src/requirements/dev.txt
+	pip3 install -r src/requirements.txt --no-use-pep517 -Ur src/requirements/dev.txt
 	cd src
 	python manage.py check
 	make all compress
 	py.test --reruns 5 -n 3 tests
 fi
 if [ "$1" == "tests-cov" ]; then
-	pip3 install -r src/requirements.txt -Ur src/requirements/dev.txt
+	pip3 install -r src/requirements.txt --no-use-pep517 -Ur src/requirements/dev.txt
 	cd src
 	python manage.py check
 	make all compress
 	coverage run -m py.test --reruns 5 tests && codecov
 fi
 if [ "$1" == "plugins" ]; then
-	pip3 install -r src/requirements.txt -Ur src/requirements/dev.txt
+	pip3 install -r src/requirements.txt --no-use-pep517 -Ur src/requirements/dev.txt
 	cd src
 	python setup.py develop
 	make all compress

CONTRIBUTING.md

@@ -3,7 +3,7 @@ Contributing to pretix
 
 Hey there and welcome to pretix!
 
-We've got an contributors guide in [our documentation](https://docs.pretix.eu/en/latest/development/contribution/)
+We've got a contributors guide in [our documentation](https://docs.pretix.eu/en/latest/development/contribution/)
 together with notes on the [development setup](https://docs.pretix.eu/en/latest/development/setup.html).
 
 Please note that we have a [Code of Conduct](https://docs.pretix.eu/en/latest/development/contribution/codeofconduct.html)

Dockerfile

@@ -57,6 +57,8 @@ COPY deployment/docker/nginx.conf /etc/nginx/nginx.conf
 COPY deployment/docker/production_settings.py /pretix/src/production_settings.py
 COPY src /pretix/src
 
+RUN cd /pretix/src && pip3 install .
+
 RUN chmod +x /usr/local/bin/pretix && \
     rm /etc/nginx/sites-enabled/default && \
     cd /pretix/src && \

doc/admin/config.rst

@@ -57,6 +57,9 @@ Example::
     A comma-separated list of plugins that are not available even though they are installed.
     Defaults to an empty string.
 
+``auth_backends``
+    A comma-separated list of available auth backends. Defaults to ``pretix.base.auth.NativeAuthBackend``.
+
 ``cookie_domain``
     The cookie domain to be set. Defaults to ``None``.
 

doc/admin/installation/docker_smallscale.rst

@@ -276,7 +276,7 @@ choice)::
 
 Then, go to that directory and build the image::
 
-    $ docker build -t mypretix
+    $ docker build . -t mypretix
 
 You can now use that image ``mypretix`` instead of ``pretix/standalone`` in your service file (see above). Be sure
 to re-build your custom image after you pulled ``pretix/standalone`` if you want to perform an update.

doc/admin/installation/enterprise.rst

@@ -68,7 +68,7 @@ generated key and installs the plugin from the URL we told you::
         mkdir -p /etc/ssh && \
         ssh-keyscan -t rsa -p 10022 code.rami.io >> /root/.ssh/known_hosts && \
         echo StrictHostKeyChecking=no >> /root/.ssh/config && \
-        pip3 install -Ue "git+ssh://git@code.rami.io:10022/pretix/pretix-slack.git@stable#egg=pretix-slack" && \
+        DJANGO_SETTINGS_MODULE=pretix.settings pip3 install -U "git+ssh://git@code.rami.io:10022/pretix/pretix-slack.git@stable#egg=pretix-slack" && \
         cd /pretix/src && \
         sudo -u pretixuser make production
     USER pretixuser

doc/api/guides/custom_checkout.rst

@@ -0,0 +1,132 @@
+Creating an external checkout process
+=====================================
+
+Occasionally, we get asked whether it is possible to just use pretix' powerful backend as a ticketing engine but use
+a fully-customized checkout process that only communicates via the API. This is possible, but with a few limitations.
+If you go down this route, you will miss out on many of pretix features and safeguards, as well as the added flexibility
+by most of pretix' plugins. We strongly recommend to talk this through with us before you decide this is the way to go.
+
+However, this is really useful if you need to tightly integrate pretix into existing web applications that e.g. control
+the pricing of your products in a way that cannot be mapped to pretix' product structures.
+
+Creating orders
+---------------
+
+After letting your user select the products to  buy in your application, you should create a new order object inside
+pretix. Below, you can see an example of such an order, but most fields are optional and there are some more features
+supported. Read :ref:`rest-orders-create` to learn more about this endpoint.
+
+Please note that this endpoint assumes trustworthy input for the most part. By default, the endpoint checks that
+you do not exceed any quotas, do not sell any seats twice, or do not use any redeemed vouchers. However, it will not
+complain about violation of any other availability constraints, such as violation of time frames or minimum/maximum
+amounts of either your product or event. Bundled products will not be added in automatically and fees will not be
+calculated automatically.
+
+.. sourcecode:: http
+
+    POST /api/v1/organizers/democon/events/3vjrh/orders/ HTTP/1.1
+    Host: test.pretix.eu
+    Accept: application/json, text/javascript
+    Content-Type: application/json
+    Authorization: …
+
+    {
+      "email": "dummy@example.org",
+      "locale": "en",
+      "sales_channel": "web",
+      "payment_provider": "banktransfer",
+      "invoice_address": {
+        "is_business": false,
+        "company": "Sample company",
+        "name_parts": {"full_name": "John Doe"},
+        "street": "Sesam Street 12",
+        "zipcode": "12345",
+        "city": "Sample City",
+        "country": "US",
+        "state": "NY",
+        "internal_reference": "",
+        "vat_id": ""
+      },
+      "positions": [
+        {
+          "item": 21,
+          "variation": null,
+          "attendee_name_parts": {
+            "full_name": "Peter"
+          },
+          "answers": [
+            {
+              "question": 1,
+              "answer": "23",
+              "options": []
+            }
+          ],
+          "subevent": null
+        }
+      ],
+      "fees": []
+    }
+
+You will be returned a full order object that you can inspect, store, or use to build emails or confirmation pages for
+the user. If you don't want to do that yourself, it will also contain the URL to our confirmation page in the ``url``
+attribute. If you pass the ``"send_mail": true`` option, pretix will also send order confirmations for you.
+
+Handling payments yourself
+--------------------------
+
+If you want to handle payments in your application, you can either just create the orders with status "paid" or you can
+create them in "pending" state (the default) and later confirm the payment. We strongly advise to use the payment
+provider ``"manual"`` in this case to avoid interference with payment code with pretix.
+
+However, it is often unfeasible to implement the payment process yourself, and it also requires you to give up a
+lot of pretix functionality, such as automatic refunds. Therefore, it is also possible to utilize pretix' native
+payment process even in this case:
+
+Using pretix payment providers
+------------------------------
+
+If you passed a ``payment_provider`` during order creation above, pretix will have created a payment object with state
+``created`` that you can see in the returned order object. This payment object will have an attribute ``payment_url``
+that you can use to let the user pay. For example, you could link or redirect to this page.
+
+If you want the user to return to your application after the payment is complete, you can pass a query parameter
+``return_url``. To prepare your event for this, open your event in the pretix backend and go to "Settings", then
+"Plugins". Enable the plugin "Redirection from order page". Then, go to the new page "Settings", then "Redirection".
+Enter the base URL of your web application. This will allow you to redirect to pages under this base URL later on.
+For example, if you want users to be redirected to ``https://example.org/order/return?tx_id=1234``, you could now
+either enter ``https://example.org`` or ``https://example.org/order/``.
+
+The user will be redirected back to your page instead of pretix' order confirmation page after the payment,
+**regardless of whether it was successful or not**. Make sure you use our API to check if the payment actually
+worked! Your final URL could look like this::
+
+    https://test.pretix.eu/democon/3vjrh/order/NSLEZ/ujbrnsjzbq4dzhck/pay/123/?return_url=https%3A%2F%2Fexample.org%2Forder%2Freturn%3Ftx_id%3D1234
+
+You can also embed this page in an ``<iframe>`` instead. Note, however, that this causes problems with some payment
+methods such as PayPal which do not allow being opened in an iframe. pretix can partly work around these issues by
+opening a new window, but will only to so if you also append an ``iframe=1`` parameter to the URL::
+
+    https://test.pretix.eu/democon/3vjrh/order/NSLEZ/ujbrnsjzbq4dzhck/pay/123/?return_url=https%3A%2F%2Fexample.org%2Forder%2Freturn%3Ftx_id%3D1234&iframe=1
+
+If you did **not** pass a payment method since you want us to ask the user which payment method they want to use, you
+need to construct the URL from the ``url`` attribute of the order and the sub-path ``pay/change```. For example, you
+would end up with the following URL::
+
+    https://test.pretix.eu/democon/3vjrh/order/NSLEZ/ujbrnsjzbq4dzhck/pay/change
+
+Of course, you can also use the ``iframe`` and ``return_url`` parameters here.
+
+Optional: Cart reservations
+---------------------------
+
+Creating orders is an atomic operation: The order is either created as a whole or not at all. However, pretix'
+built-in checkout automatically reserves tickets in a user's cart for a configurable amount of time to ensure users
+will actually get their tickets once they started entering all their details. If you want a similar behavior in your
+application, you need to create :ref:`rest-carts` through the API.
+
+When creating your order, you can pass a ``consume_carts`` parameter with the cart ID(s) of your user. This way, the
+quota reserved by the cart will be credited towards the order and the carts will be destroyed if (and only if) the
+order creation succeeds.
+
+Cart creation is currently even more limited than the order creation endpoints, as cart creation currently does not
+support vouchers or automatic price calculation. If you require these features, please get in touch with us.

doc/api/guides/index.rst

@@ -0,0 +1,11 @@
+.. _`rest-api-guides`:
+
+API Usage Guides
+================
+
+This part of the documentation contains how-to guides on some special use cases of our API.
+
+.. toctree::
+   :maxdepth: 2
+
+   custom_checkout

doc/api/index.rst

@@ -18,3 +18,4 @@ in functionality over time.
    resources/index
    ratelimit
    webhooks
+   guides/index

doc/api/resources/checkinlists.rst

@@ -1,3 +1,5 @@
+.. spelling:: checkin
+
 Check-in lists
 ==============
 
@@ -27,6 +29,7 @@ subevent                              integer                    ID of the date
 position_count                        integer                    Number of tickets that match this list (read-only).
 checkin_count                         integer                    Number of check-ins performed on this list (read-only).
 include_pending                       boolean                    If ``true``, the check-in list also contains tickets from orders in pending state.
+auto_checkin_sales_channels           list of strings            All items on the check-in list will be automatically marked as checked-in when purchased through any of the listed sales channels.
 ===================================== ========================== =======================================================
 
 .. versionchanged:: 1.10
@@ -41,6 +44,10 @@ include_pending                       boolean                    If ``true``, th
 
    The ``include_pending`` field has been added.
 
+.. versionchanged:: 3.2
+
+    The ``auto_checkin_sales_channels`` field has been added.
+
 Endpoints
 ---------
 
@@ -81,7 +88,10 @@ Endpoints
             "all_products": true,
             "limit_products": [],
             "include_pending": false,
-            "subevent": null
+            "subevent": null,
+            "auto_checkin_sales_channels": [
+              "pretixpos"
+            ]
           }
         ]
       }
@@ -122,7 +132,10 @@ Endpoints
         "all_products": true,
         "limit_products": [],
         "include_pending": false,
-        "subevent": null
+        "subevent": null,
+        "auto_checkin_sales_channels": [
+          "pretixpos"
+        ]
       }
 
    :param organizer: The ``slug`` field of the organizer to fetch
@@ -215,7 +228,10 @@ Endpoints
         "name": "VIP entry",
         "all_products": false,
         "limit_products": [1, 2],
-        "subevent": null
+        "subevent": null,
+        "auto_checkin_sales_channels": [
+          "pretixpos"
+        ]
       }
 
    **Example response**:
@@ -234,7 +250,10 @@ Endpoints
         "all_products": false,
         "limit_products": [1, 2],
         "include_pending": false,
-        "subevent": null
+        "subevent": null,
+        "auto_checkin_sales_channels": [
+          "pretixpos"
+        ]
       }
 
    :param organizer: The ``slug`` field of the organizer of the event/item to create a list for
@@ -283,7 +302,10 @@ Endpoints
         "all_products": false,
         "limit_products": [1, 2],
         "include_pending": false,
-        "subevent": null
+        "subevent": null,
+        "auto_checkin_sales_channels": [
+          "pretixpos"
+        ]
       }
 
    :param organizer: The ``slug`` field of the organizer to modify
@@ -342,6 +364,11 @@ Order position endpoints
    ``ignore_status`` filter. The ``attendee_name`` field is now "smart" (see below) and the redemption endpoint
    returns ``400`` instead of ``404`` on tickets which are known but not paid.
 
+.. versionchanged:: 3.2
+
+    The ``checkins`` dict now also contains a ``auto_checked_in`` value to indicate if the check-in has been performed
+    automatically by the system.
+
 .. http:get:: /api/v1/organizers/(organizer)/events/(event)/checkinlists/(list)/positions/
 
    Returns a list of all order positions within a given event. The result is the same as
@@ -400,7 +427,8 @@ Order position endpoints
             "checkins": [
               {
                 "list": 1,
-                "datetime": "2017-12-25T12:45:23Z"
+                "datetime": "2017-12-25T12:45:23Z",
+                "auto_checked_in": true
               }
             ],
             "answers": [
@@ -510,7 +538,8 @@ Order position endpoints
         "checkins": [
           {
             "list": 1,
-            "datetime": "2017-12-25T12:45:23Z"
+            "datetime": "2017-12-25T12:45:23Z",
+            "auto_checked_in": true
           }
         ],
         "answers": [

doc/api/resources/events.rst

@@ -1,3 +1,9 @@
+.. spelling::
+
+   geo
+   lat
+   lon
+
 Events
 ======
 
@@ -25,6 +31,8 @@ is_public                             boolean                    If ``true``, th
 presale_start                         datetime                   The date at which the ticket shop opens (or ``null``)
 presale_end                           datetime                   The date at which the ticket shop closes (or ``null``)
 location                              multi-lingual string       The event location (or ``null``)
+geo_lat                               float                      Latitude of the location (or ``null``)
+geo_lon                               float                      Longitude of the location (or ``null``)
 has_subevents                         boolean                    ``true`` if the event series feature is active for this
                                                                  event. Cannot change after event is created.
 meta_data                             object                     Values set for organizer-specific meta data parameters.
@@ -62,9 +70,17 @@ seat_category_mapping                 object                     An object mappi
 
    The attributes ``seating_plan`` and ``seat_category_mapping`` have been added.
 
+.. versionchanged:: 3.3
+
+   The attributes ``geo_lat`` and ``geo_lon`` have been added.
+
 Endpoints
 ---------
 
+.. versionchanged:: 3.3
+
+    The events resource can now be filtered by meta data attributes.
+
 .. http:get:: /api/v1/organizers/(organizer)/events/
 
    Returns a list of all events within a given organizer the authenticated user/token has access to.
@@ -105,6 +121,8 @@ Endpoints
             "presale_start": null,
             "presale_end": null,
             "location": null,
+            "geo_lat": null,
+            "geo_lon": null,
             "has_subevents": false,
             "meta_data": {},
             "seating_plan": null,
@@ -129,6 +147,10 @@ Endpoints
    :query string ordering: Manually set the ordering of results. Valid fields to be used are ``date_from`` and
                            ``slug``. Keep in mind that ``date_from`` of event series does not really tell you anything.
                            Default: ``slug``.
+   :query array attr[meta_data_key]: By providing the key and value of a meta data attribute, the list of events will
+        only contain the events matching the set criteria. Providing ``?attr[Format]=Seminar`` would return only those
+        events having set their ``Format`` meta data to ``Seminar``, ``?attr[Format]=`` only those, that have no value
+        set. Please note that this filter will respect default values set on organizer level.
    :param organizer: The ``slug`` field of a valid organizer
    :statuscode 200: no error
    :statuscode 401: Authentication failure
@@ -169,6 +191,8 @@ Endpoints
         "presale_start": null,
         "presale_end": null,
         "location": null,
+        "geo_lat": null,
+        "geo_lon": null,
         "has_subevents": false,
         "seating_plan": null,
         "seat_category_mapping": {},
@@ -220,6 +244,8 @@ Endpoints
         "seating_plan": null,
         "seat_category_mapping": {},
         "location": null,
+        "geo_lat": null,
+        "geo_lon": null,
         "has_subevents": false,
         "meta_data": {},
         "plugins": [
@@ -249,6 +275,8 @@ Endpoints
         "presale_start": null,
         "presale_end": null,
         "location": null,
+        "geo_lat": null,
+        "geo_lon": null,
         "seating_plan": null,
         "seat_category_mapping": {},
         "has_subevents": false,
@@ -268,11 +296,11 @@ Endpoints
 
 .. http:post:: /api/v1/organizers/(organizer)/events/(event)/clone/
 
-   Creates a new event with properties as set in the request body. The properties that are copied are: 'is_public',
-   `testmode`, settings, plugin settings, items, variations, add-ons, quotas, categories, tax rules, questions.
+   Creates a new event with properties as set in the request body. The properties that are copied are: ``is_public``,
+   ``testmode``, ``has_subevents``, settings, plugin settings, items, variations, add-ons, quotas, categories, tax rules, questions.
 
-   If the 'plugins' and/or 'is_public' fields are present in the post body this will determine their value. Otherwise
-   their value will be copied from the existing event.
+   If the ``plugins``, ``has_subevents`` and/or ``is_public`` fields are present in the post body this will determine their
+   value. Otherwise their value will be copied from the existing event.
 
    Please note that you can only copy from events under the same organizer.
 
@@ -300,6 +328,8 @@ Endpoints
         "presale_start": null,
         "presale_end": null,
         "location": null,
+        "geo_lat": null,
+        "geo_lon": null,
         "seating_plan": null,
         "seat_category_mapping": {},
         "has_subevents": false,
@@ -331,6 +361,8 @@ Endpoints
         "presale_start": null,
         "presale_end": null,
         "location": null,
+        "geo_lat": null,
+        "geo_lon": null,
         "has_subevents": false,
         "seating_plan": null,
         "seat_category_mapping": {},
@@ -394,6 +426,8 @@ Endpoints
         "presale_start": null,
         "presale_end": null,
         "location": null,
+        "geo_lat": null,
+        "geo_lon": null,
         "has_subevents": false,
         "seating_plan": null,
         "seat_category_mapping": {},

doc/api/resources/giftcards.rst

@@ -0,0 +1,229 @@
+.. _`rest-giftcards`:
+
+Gift cards
+==========
+
+Resource description
+--------------------
+
+The gift card resource contains the following public fields:
+
+.. rst-class:: rest-resource-table
+
+===================================== ========================== =======================================================
+Field                                 Type                       Description
+===================================== ========================== =======================================================
+id                                    integer                    Internal ID of the gift card
+secret                                string                     Gift card code (can not be modified later)
+value                                 money (string)             Current gift card value
+currency                              string                     Currency of the value (can not be modified later)
+testmode                              boolean                    Whether this is a test gift card
+===================================== ========================== =======================================================
+
+Endpoints
+---------
+
+.. http:get:: /api/v1/organizers/(organizer)/giftcards/
+
+   Returns a list of all gift cards issued by a given organizer.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/giftcards/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "count": 1,
+        "next": null,
+        "previous": null,
+        "results": [
+          {
+            "id": 1,
+            "secret": "HLBYVELFRC77NCQY",
+            "currency": "EUR",
+            "testmode": false,
+            "value": "13.37"
+          }
+        ]
+      }
+
+   :query integer page: The page number in case of a multi-page result set, default is 1
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer does not exist **or** you have no permission to view this resource.
+
+.. http:get:: /api/v1/organizers/(organizer)/giftcards/(id)/
+
+   Returns information on one gift card, identified by its ID.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/giftcards/1/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "id": 1,
+        "secret": "HLBYVELFRC77NCQY",
+        "currency": "EUR",
+        "testmode": false,
+        "value": "13.37"
+      }
+
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :param id: The ``id`` field of the gift card to fetch
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer does not exist **or** you have no permission to view this resource.
+
+.. http:post:: /api/v1/organizers/(organizer)/giftcards/
+
+   Creates a new gift card
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      POST /api/v1/organizers/bigevents/giftcards/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+      Content-Type: application/json
+
+      {
+        "secret": "HLBYVELFRC77NCQY",
+        "currency": "EUR",
+        "value": "13.37"
+      }
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 201 Created
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "id": 1,
+        "secret": "HLBYVELFRC77NCQY",
+        "testmode": false,
+        "currency": "EUR",
+        "value": "13.37"
+      }
+
+   :param organizer: The ``slug`` field of the organizer to create a gift card for
+   :statuscode 201: no error
+   :statuscode 400: The gift card could not be created due to invalid submitted data.
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer does not exist **or** you have no permission to create this resource.
+
+.. http:patch:: /api/v1/organizers/(organizer)/giftcards/(id)/
+
+   Update a gift card. You can also use ``PUT`` instead of ``PATCH``. With ``PUT``, you have to provide all fields of
+   the resource, other fields will be reset to default. With ``PATCH``, you only need to provide the fields that you
+   want to change.
+
+   You can change all fields of the resource except the ``id``, ``secret``, ``testmode``, and ``currency`` fields. Be
+   careful when modifying the ``value`` field to avoid race conditions. We recommend to use the ``transact`` method
+   described below.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      PATCH /api/v1/organizers/bigevents/giftcards/1/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+      Content-Type: application/json
+      Content-Length: 94
+
+      {
+        "value": "14.00"
+      }
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "id": 1,
+        "secret": "HLBYVELFRC77NCQY",
+        "testmode": false,
+        "currency": "EUR",
+        "value": "14.00"
+      }
+
+   :param organizer: The ``slug`` field of the organizer to modify
+   :param id: The ``id`` field of the gift card to modify
+   :statuscode 200: no error
+   :statuscode 400: The gift card could not be modified due to invalid submitted data
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer does not exist **or** you have no permission to change this resource.
+
+.. http:post:: /api/v1/organizers/(organizer)/giftcards/(id)/transact/
+
+   Atomically change the value of a gift card. A positive amount will increase the value of the gift card,
+   a negative amount will decrease it.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      PATCH /api/v1/organizers/bigevents/giftcards/1/transact/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+      Content-Type: application/json
+      Content-Length: 94
+
+      {
+        "value": "2.00"
+      }
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "id": 1,
+        "secret": "HLBYVELFRC77NCQY",
+        "currency": "EUR",
+        "testmode": false,
+        "value": "15.37"
+      }
+
+   :param organizer: The ``slug`` field of the organizer to modify
+   :param id: The ``id`` field of the gift card to modify
+   :statuscode 200: no error
+   :statuscode 400: The gift card could not be modified due to invalid submitted data
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer does not exist **or** you have no permission to change this resource.

doc/api/resources/index.rst

@@ -21,6 +21,7 @@ Resources and endpoints
    vouchers
    checkinlists
    waitinglist
+   giftcards
    carts
    webhooks
    seatingplans

doc/api/resources/items.rst

@@ -77,6 +77,7 @@ generate_tickets                      boolean                    If ``false``, t
                                                                  rules apply.
 allow_waitinglist                     boolean                    If ``false``, no waiting list will be shown for this
                                                                  product when it is sold out.
+issue_giftcard                        boolean                    If ``true``, buying this product will yield a gift card.
 show_quota_left                       boolean                    Publicly show how many tickets are still available.
                                                                  If this is ``null``, the event default is used.
 has_variations                        boolean                    Shows whether or not this item has variations.
@@ -206,6 +207,7 @@ Endpoints
             "tax_rate": "0.00",
             "tax_rule": 1,
             "admission": false,
+            "issue_giftcard": false,
             "position": 0,
             "picture": null,
             "available_from": null,
@@ -300,6 +302,7 @@ Endpoints
         "tax_rate": "0.00",
         "tax_rule": 1,
         "admission": false,
+        "issue_giftcard": false,
         "position": 0,
         "picture": null,
         "available_from": null,
@@ -375,6 +378,7 @@ Endpoints
         "tax_rate": "0.00",
         "tax_rule": 1,
         "admission": false,
+        "issue_giftcard": false,
         "position": 0,
         "picture": null,
         "available_from": null,
@@ -437,6 +441,7 @@ Endpoints
         "tax_rate": "0.00",
         "tax_rule": 1,
         "admission": false,
+        "issue_giftcard": false,
         "position": 0,
         "picture": null,
         "available_from": null,
@@ -531,6 +536,7 @@ Endpoints
         "tax_rate": "0.00",
         "tax_rule": 1,
         "admission": false,
+        "issue_giftcard": false,
         "position": 0,
         "picture": null,
         "available_from": null,

doc/api/resources/orders.rst

@@ -53,7 +53,9 @@ invoice_address                       object                     Invoice address
 ├ street                              string                     Customer street
 ├ zipcode                             string                     Customer ZIP code
 ├ city                                string                     Customer city
-├ country                             string                     Customer country
+├ country                             string                     Customer country code
+├ state                               string                     Customer state (ISO 3166-2 code). Only supported in
+                                                                 AU, BR, CA, CN, MY, MX, and US.
 ├ internal_reference                  string                     Customer's internal reference to be printed on the invoice
 ├ vat_id                              string                     Customer VAT ID
 └ vat_id_validated                    string                     ``true``, if the VAT ID has been validated against the
@@ -82,6 +84,7 @@ require_approval                      boolean                    If ``true`` and
                                                                  needs approval by an organizer before it can
                                                                  continue. If ``true`` and the order is canceled,
                                                                  this order has been denied by the event organizer.
+url                                   string                     The full URL to the order confirmation page
 payments                              list of objects            List of payment processes (see below)
 refunds                               list of objects            List of refund processes (see below)
 last_modified                         datetime                   Last modification of this object
@@ -128,15 +131,21 @@ last_modified                         datetime                   Last modificati
 
    The ``sales_channel`` attribute has been added.
 
-.. versionchanged:: 2.4:
+.. versionchanged:: 2.4
 
    ``order.status`` can no longer be ``r``, ``…/mark_canceled/`` now accepts a ``cancellation_fee`` parameter and
    ``…/mark_refunded/`` has been deprecated.
 
-.. versionchanged:: 2.5:
+.. versionchanged:: 2.5
 
    The ``testmode`` attribute has been added and ``DELETE`` has been implemented for orders.
 
+.. versionchanged:: 3.1
+
+   The ``invoice_address.state`` and ``url`` attributes have been added. When creating orders through the API,
+   vouchers are now supported and many fields are now optional.
+
+
 .. _order-position-resource:
 
 Order position resource
@@ -166,7 +175,8 @@ subevent                              integer                    ID of the date
 pseudonymization_id                   string                     A random ID, e.g. for use in lead scanning apps
 checkins                              list of objects            List of check-ins with this ticket
 ├ list                                integer                    Internal ID of the check-in list
-└ datetime                            datetime                   Time of check-in
+├ datetime                            datetime                   Time of check-in
+└ auto_checked_in                     boolean                    Indicates if this check-in been performed automatically by the system
 downloads                             list of objects            List of ticket download options
 ├ output                              string                     Ticket output provider (e.g. ``pdf``, ``passbook``)
 └ url                                 string                     Download URL
@@ -205,6 +215,15 @@ pdf_data                              object                     Data object req
 
   The attribute ``seat`` has been added.
 
+.. versionchanged:: 3.2
+
+  The value ``auto_checked_in`` has been added to the ``checkins``-attribute.
+
+.. versionchanged:: 3.3
+
+  The ``url`` of a ticket ``download`` can now also return a ``text/uri-list`` instead of a file. See
+  :ref:`order-position-ticket-download` for details.
+
 .. _order-payment-resource:
 
 Order payment resource
@@ -221,13 +240,27 @@ amount                                money (string)             Payment amount
 created                               datetime                   Date and time of creation of this payment
 payment_date                          datetime                   Date and time of completion of this payment (or ``null``)
 provider                              string                     Identification string of the payment provider
+payment_url                           string                     The URL where an user can continue with the payment (or ``null``)
+details                               object                     Payment-specific information. This is a dictionary
+                                                                 with various fields that can be different between
+                                                                 payment providers, versions, payment states, etc. If
+                                                                 you read this field, you always need to be able to
+                                                                 deal with situations where values that you expect are
+                                                                 missing. Mostly, the field contains various IDs that
+                                                                 can be used for matching with other systems. If a
+                                                                 payment provider does not implement this feature,
+                                                                 the object is empty.
 ===================================== ========================== =======================================================
 
 .. versionchanged:: 2.0
 
   This resource has been added.
 
-.. _order-payment-resource:
+.. versionchanged:: 3.1
+
+  The attributes ``payment_url`` and ``details`` have been added.
+
+.. _order-refund-resource:
 
 Order refund resource
 ---------------------
@@ -288,6 +321,7 @@ List of all orders
             "status": "p",
             "testmode": false,
             "secret": "k24fiuwvu8kxz3y1",
+            "url": "https://test.pretix.eu/dummy/dummy/order/ABC12/k24fiuwvu8kxz3y1/",
             "email": "tester@example.org",
             "locale": "en",
             "sales_channel": "web",
@@ -310,7 +344,8 @@ List of all orders
                 "street": "Test street 12",
                 "zipcode": "12345",
                 "city": "Testington",
-                "country": "Testikistan",
+                "country": "DE",
+                "state": "",
                 "internal_reference": "",
                 "vat_id": "EU123456789",
                 "vat_id_validated": false
@@ -340,7 +375,8 @@ List of all orders
                 "checkins": [
                   {
                     "list": 44,
-                    "datetime": "2017-12-25T12:45:23Z"
+                    "datetime": "2017-12-25T12:45:23Z",
+                    "auto_checked_in": false
                   }
                 ],
                 "answers": [
@@ -373,6 +409,8 @@ List of all orders
                 "amount": "23.00",
                 "created": "2017-12-01T10:00:00Z",
                 "payment_date": "2017-12-04T12:13:12Z",
+                "payment_url": null,
+                "details": {},
                 "provider": "banktransfer"
               }
             ],
@@ -431,6 +469,7 @@ Fetching individual orders
         "status": "p",
         "testmode": false,
         "secret": "k24fiuwvu8kxz3y1",
+        "url": "https://test.pretix.eu/dummy/dummy/order/ABC12/k24fiuwvu8kxz3y1/",
         "email": "tester@example.org",
         "locale": "en",
         "sales_channel": "web",
@@ -453,7 +492,8 @@ Fetching individual orders
             "street": "Test street 12",
             "zipcode": "12345",
             "city": "Testington",
-            "country": "Testikistan",
+            "country": "DE",
+            "state": "",
             "internal_reference": "",
             "vat_id": "EU123456789",
             "vat_id_validated": false
@@ -483,7 +523,8 @@ Fetching individual orders
             "checkins": [
               {
                 "list": 44,
-                "datetime": "2017-12-25T12:45:23Z"
+                "datetime": "2017-12-25T12:45:23Z",
+                "auto_checked_in": false
               }
             ],
             "answers": [
@@ -516,6 +557,8 @@ Fetching individual orders
             "amount": "23.00",
             "created": "2017-12-01T10:00:00Z",
             "payment_date": "2017-12-04T12:13:12Z",
+            "payment_url": null,
+            "details": {},
             "provider": "banktransfer"
           }
         ],
@@ -691,6 +734,8 @@ Deleting orders
    :statuscode 403: The requested organizer/event does not exist **or** you have no permission to delete this resource **or** the order may not be deleted.
    :statuscode 404: The requested order does not exist.
 
+.. _rest-orders-create:
+
 Creating orders
 ---------------
 
@@ -716,25 +761,21 @@ Creating orders
 
        * does not validate the number of items per order or the number of times an item can be included in an order
 
-       * does not validate any requirements related to add-on products
+       * does not validate any requirements related to add-on products and does not add bundled products automatically
 
-       * does not check or calculate prices but believes any prices you send
-
-       * does not support the redemption of vouchers
+       * does not check prices but believes any prices you send
 
        * does not prevent you from buying items that can only be bought with a voucher
 
-       * does not calculate fees
+       * does not calculate fees automatically
 
        * does not allow to pass data to plugins and will therefore cause issues with some plugins like the shipping
          module
 
-       * does not send order confirmations via email
-
-       * does not support reverse charge taxation
-
        * does not support file upload questions
 
+       * does not support redeeming gift cards
+
    You can supply the following fields of the resource:
 
    * ``code`` (optional)
@@ -750,9 +791,10 @@ Creating orders
    * ``email``
    * ``locale``
    * ``sales_channel``
-   * ``payment_provider`` – The identifier of the payment provider set for this order. This needs to be an existing
-     payment provider. You should use ``"free"`` for free orders, and we strongly advise to use ``"manual"`` for all
-     orders you create as paid.
+   * ``payment_provider`` (optional) – The identifier of the payment provider set for this order. This needs to be an
+     existing payment provider. You should use ``"free"`` for free orders, and we strongly advise to use ``"manual"``
+     for all orders you create as paid. This field is optional when the order status is ``"n"`` or the order total is
+     zero, otherwise it is required.
    * ``payment_info`` (optional) – You can pass a nested JSON object that will be set as the internal ``info``
      value of the payment object that will be created. How this value is handled is up to the payment provider and you
      should only use this if you know the specific payment provider in detail. Please keep in mind that the payment
@@ -770,17 +812,22 @@ Creating orders
       * ``zipcode``
       * ``city``
       * ``country``
+      * ``state``
       * ``internal_reference``
       * ``vat_id``
+      * ``vat_id_validated`` (optional) – If you need support for reverse charge (rarely the case), you need to check
+       yourself if the passed VAT ID is a valid EU VAT ID. In that case, set this to ``true``. Only valid VAT IDs will
+       trigger reverse charge taxation. Don't forget to set ``is_business`` as well!
 
    * ``positions``
 
       * ``positionid`` (optional, see below)
       * ``item``
       * ``variation``
-      * ``price``
+      * ``price`` (optional, if set to ``null`` or missing the price will be computed from the given product)
       * ``seat`` (The ``seat_guid`` attribute of a seat. Required when the specified ``item`` requires a seat, otherwise must be ``null``.)
       * ``attendee_name`` **or** ``attendee_name_parts``
+      * ``voucher`` (optional, the ``code`` attribute of a valid voucher)
       * ``attendee_email``
       * ``secret`` (optional)
       * ``addon_to`` (optional, see below)
@@ -800,6 +847,8 @@ Creating orders
       * ``tax_rule``
 
    * ``force`` (optional). If set to ``true``, quotas will be ignored.
+   * ``send_mail`` (optional). If set to ``true``, the same emails will be sent as for a regular order. Defaults to
+     ``false``.
 
    If you want to use add-on products, you need to set the ``positionid`` fields of all positions manually
    to incrementing integers starting with ``1``. Then, you can reference one of these
@@ -837,6 +886,7 @@ Creating orders
           "zipcode": "12345",
           "city": "Sample City",
           "country": "UK",
+          "state": "",
           "internal_reference": "",
           "vat_id": ""
         },
@@ -860,7 +910,7 @@ Creating orders
             ],
             "subevent": null
           }
-        ],
+        ]
       }
 
    **Example response**:
@@ -1251,6 +1301,11 @@ List of all order positions
    The order positions endpoint has been extended by the filter queries ``voucher``, ``voucher__code`` and
    ``pseudonymization_id``.
 
+.. versionchanged:: 3.2
+
+  The value ``auto_checked_in`` has been added to the ``checkins``-attribute.
+
+
 .. note:: Individually canceled order positions are currently not visible via the API at all.
 
 .. http:get:: /api/v1/organizers/(organizer)/events/(event)/orderpositions/
@@ -1302,7 +1357,8 @@ List of all order positions
             "checkins": [
               {
                 "list": 44,
-                "datetime": "2017-12-25T12:45:23Z"
+                "datetime": "2017-12-25T12:45:23Z",
+                "auto_checked_in": false
               }
             ],
             "answers": [
@@ -1403,7 +1459,8 @@ Fetching individual positions
         "checkins": [
           {
             "list": 44,
-            "datetime": "2017-12-25T12:45:23Z"
+            "datetime": "2017-12-25T12:45:23Z",
+            "auto_checked_in": false
           }
         ],
         "answers": [
@@ -1431,6 +1488,8 @@ Fetching individual positions
    :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view this resource.
    :statuscode 404: The requested order position does not exist.
 
+.. _`order-position-ticket-download`:
+
 Order position ticket download
 ------------------------------
 
@@ -1440,6 +1499,11 @@ Order position ticket download
    Depending on the chosen output, the response might be a ZIP file, PDF file or something else. The order details
    response contains a list of output options for this particular order position.
 
+   Be aware that the output does not have to be a file, but can also be a regular HTTP response with a ``Content-Type``
+   set to ``text/uri-list``. In this case, the user is expected to navigate to that URL in order to access their ticket.
+   The referenced URL can provide a download or a regular, human-viewable website - so it is advised to open this URL
+   in a webbrowser and leave it up to the user to handle the result.
+
    Tickets can be only downloaded if the order is paid and if ticket downloads are active. Also, depending on event
    configuration downloads might be only unavailable for add-on products or non-admission products.
    Note that in some cases the ticket file might not yet have been created. In that case, you will receive a status
@@ -1546,6 +1610,8 @@ Order payment endpoints
             "amount": "23.00",
             "created": "2017-12-01T10:00:00Z",
             "payment_date": "2017-12-04T12:13:12Z",
+            "payment_url": null,
+            "details": {},
             "provider": "banktransfer"
           }
         ]
@@ -1586,6 +1652,8 @@ Order payment endpoints
         "amount": "23.00",
         "created": "2017-12-01T10:00:00Z",
         "payment_date": "2017-12-04T12:13:12Z",
+        "payment_url": null,
+        "details": {},
         "provider": "banktransfer"
       }
 

doc/api/resources/questions.rst

@@ -41,6 +41,8 @@ ask_during_checkin                    boolean                    If ``true``, th
                                                                  the ticket instead.
 hidden                                boolean                    If ``true``, the question will only be shown in the
                                                                  backend.
+print_on_invoice                      boolean                    If ``true``, the question will only be shown on
+                                                                 invoices.
 options                               list of objects            In case of question type ``C`` or ``M``, this lists the
                                                                  available objects. Only writable during creation,
                                                                  use separate endpoint to modify this later.
@@ -80,6 +82,10 @@ dependency_value                      string                     An old version
 
   The attribute ``dependency_values`` has been added.
 
+.. versionchanged:: 3.1
+
+  The attribute ``print_on_invoice`` has been added.
+
 Endpoints
 ---------
 
@@ -123,6 +129,7 @@ Endpoints
             "identifier": "WY3TP9SL",
             "ask_during_checkin": false,
             "hidden": false,
+            "print_on_invoice": false,
             "dependency_question": null,
             "dependency_value": null,
             "dependency_values": [],
@@ -192,6 +199,7 @@ Endpoints
         "identifier": "WY3TP9SL",
         "ask_during_checkin": false,
         "hidden": false,
+        "print_on_invoice": false,
         "dependency_question": null,
         "dependency_value": null,
         "dependency_values": [],
@@ -245,6 +253,7 @@ Endpoints
         "position": 1,
         "ask_during_checkin": false,
         "hidden": false,
+        "print_on_invoice": false,
         "dependency_question": null,
         "dependency_values": [],
         "options": [
@@ -279,6 +288,7 @@ Endpoints
         "identifier": "WY3TP9SL",
         "ask_during_checkin": false,
         "hidden": false,
+        "print_on_invoice": false,
         "dependency_question": null,
         "dependency_value": null,
         "dependency_values": [],
@@ -352,6 +362,7 @@ Endpoints
         "identifier": "WY3TP9SL",
         "ask_during_checkin": false,
         "hidden": false,
+        "print_on_invoice": false,
         "dependency_question": null,
         "dependency_value": null,
         "dependency_values": [],

doc/api/resources/subevents.rst

@@ -1,3 +1,9 @@
+.. spelling::
+
+   geo
+   lat
+   lon
+
 .. _rest-subevents:
 
 Event series dates / Sub-events
@@ -28,6 +34,8 @@ date_admission                        datetime                   The sub-event's
 presale_start                         datetime                   The sub-date at which the ticket shop opens (or ``null``)
 presale_end                           datetime                   The sub-date at which the ticket shop closes (or ``null``)
 location                              multi-lingual string       The sub-event location (or ``null``)
+geo_lat                               float                      Latitude of the location (or ``null``)
+geo_lon                               float                      Longitude of the location (or ``null``)
 item_price_overrides                  list of objects            List of items for which this sub-event overrides the
                                                                  default price
 ├ item                                integer                    The internal item ID
@@ -62,9 +70,17 @@ seat_category_mapping                 object                     An object mappi
 
    The attributes ``seating_plan`` and ``seat_category_mapping`` have been added.
 
+.. versionchanged:: 3.3
+
+   The attributes ``geo_lat`` and ``geo_lon`` have been added.
+
 Endpoints
 ---------
 
+.. versionchanged:: 3.3
+
+    The sub-events resource can now be filtered by meta data attributes.
+
 .. http:get:: /api/v1/organizers/(organizer)/events/(event)/subevents/
 
    Returns a list of all sub-events of an event.
@@ -104,6 +120,8 @@ Endpoints
             "seating_plan": null,
             "seat_category_mapping": {},
             "location": null,
+            "geo_lat": null,
+            "geo_lon": null,
             "item_price_overrides": [
               {
                 "item": 2,
@@ -123,6 +141,11 @@ Endpoints
    :query ends_after: If set to a date and time, only events that happen during of after the given time are returned.
    :param organizer: The ``slug`` field of a valid organizer
    :param event: The ``slug`` field of the main event
+   :query array attr[meta_data_key]: By providing the key and value of a meta data attribute, the list of sub-events
+        will only contain the sub-events matching the set criteria. Providing ``?attr[Format]=Seminar`` would return
+        only those sub-events having set their ``Format`` meta data to ``Seminar``, ``?attr[Format]=`` only those, that
+        have no value set. Please note that this filter will respect default values set on 
+        organizer or event level.
    :statuscode 200: no error
    :statuscode 401: Authentication failure
    :statuscode 403: The requested organizer does not exist **or** you have no permission to view it.
@@ -152,6 +175,8 @@ Endpoints
         "presale_start": null,
         "presale_end": null,
         "location": null,
+        "geo_lat": null,
+        "geo_lon": null,
         "seating_plan": null,
         "seat_category_mapping": {},
         "item_price_overrides": [
@@ -184,6 +209,8 @@ Endpoints
         "presale_start": null,
         "presale_end": null,
         "location": null,
+        "geo_lat": null,
+        "geo_lon": null,
         "seating_plan": null,
         "seat_category_mapping": {},
         "item_price_overrides": [
@@ -237,6 +264,8 @@ Endpoints
         "presale_start": null,
         "presale_end": null,
         "location": null,
+        "geo_lat": null,
+        "geo_lon": null,
         "seating_plan": null,
         "seat_category_mapping": {},
         "item_price_overrides": [
@@ -303,6 +332,8 @@ Endpoints
         "presale_start": null,
         "presale_end": null,
         "location": null,
+        "geo_lat": null,
+        "geo_lon": null,
         "seating_plan": null,
         "seat_category_mapping": {},
         "item_price_overrides": [
@@ -389,6 +420,8 @@ Endpoints
             "presale_start": null,
             "presale_end": null,
             "location": null,
+            "geo_lat": null,
+            "geo_lon": null,
             "seating_plan": null,
             "seat_category_mapping": {},
             "item_price_overrides": [

doc/development/api/auth.rst

@@ -0,0 +1,70 @@
+.. highlight:: python
+   :linenothreshold: 5
+
+Pluggable authentication backends
+=================================
+
+Plugins can supply additional authentication backends. This is mainly useful in self-hosted installations
+and allows you to use company-wide login mechanisms such as LDAP or OAuth for accessing pretix' backend.
+
+Every authentication backend contains an implementation of the interface defined in ``pretix.base.auth.BaseAuthBackend``
+(see below). Note that pretix authentication backends work differently than plain Django authentication backends.
+Basically, three pre-defined flows are supported:
+
+* Authentication mechanisms that rely on a **set of input parameters**, e.g. a username and a password. These can be
+  implemented by supplying the ``login_form_fields`` property and a ``form_authenticate`` method.
+
+* Authentication mechanisms that rely on **external sessions**, e.g. a cookie or a proxy HTTP header. These can be
+  implemented by supplying a ``request_authenticate`` method.
+
+* Authentication mechanisms that rely on **redirection**, e.g. to an OAuth provider. These can be implemented by
+  supplying a ``authentication_url`` method and implementing a custom return view.
+
+Authentication backends are *not* collected through a signal. Instead, they must explicitly be set through the
+``auth_backends`` directive in the ``pretix.cfg`` :ref:`configuration file <config>`.
+
+In each of these methods (``form_authenticate``, ``request_authenticate`` or your custom view) you are supposed to
+either get an existing :py:class:`pretix.base.models.User` object from the database or create a new one. There are a
+few rules you need to follow:
+
+* You **MUST** only return users with the ``auth_backend`` attribute set to the ``identifier`` value of your backend.
+
+* You **MUST** create new users with the ``auth_backend`` attribute set to the ``identifier`` value of your backend.
+
+* Every user object **MUST** have an email address. Email addresses are globally unique. If the email address is
+  already registered to a user who signs in through a different backend, you **SHOULD** refuse the login.
+
+The backend interface
+---------------------
+
+.. class:: pretix.base.auth.BaseAuthBackend
+
+   The central object of each backend is the subclass of ``BaseAuthBackend``.
+
+   .. autoattribute:: identifier
+
+      This is an abstract attribute, you **must** override this!
+
+   .. autoattribute:: verbose_name
+
+      This is an abstract attribute, you **must** override this!
+
+   .. autoattribute:: login_form_fields
+
+   .. autoattribute:: visible
+
+   .. automethod:: form_authenticate
+
+   .. automethod:: request_authenticate
+
+   .. automethod:: authentication_url
+
+Logging users in
+----------------
+
+If you return a user from ``form_authenticate`` or ``request_authenticate``, the system will handle everything else
+for you correctly. However, if you use a redirection method and build a custom view to verify the login, we strongly
+recommend that you use the following utility method to correctly set session values and enforce two-factor
+authentication (if activated):
+
+.. autofunction:: pretix.control.views.auth.process_login

doc/development/api/general.rst

@@ -12,7 +12,7 @@ Core
 
 .. automodule:: pretix.base.signals
    :members: periodic_task, event_live_issues, event_copy_data, email_filter, register_notification_types,
-      item_copy_data, register_sales_channels, register_global_settings, quota_availability
+      item_copy_data, register_sales_channels, register_global_settings, quota_availability, global_email_filter
 
 Order events
 """"""""""""
@@ -20,7 +20,7 @@ Order events
 There are multiple signals that will be sent out in the ordering cycle:
 
 .. automodule:: pretix.base.signals
-   :members: validate_cart, validate_cart_addons, validate_order, order_fee_calculation, order_paid, order_placed, order_canceled, order_expired, order_modified, order_changed, order_approved, order_denied, order_fee_type_name, allow_ticket_download, order_split
+   :members: validate_cart, validate_cart_addons, validate_order, order_fee_calculation, order_paid, order_placed, order_canceled, order_expired, order_modified, order_changed, order_approved, order_denied, order_fee_type_name, allow_ticket_download, order_split, order_gracefully_delete
 
 Frontend
 --------

doc/development/api/index.rst

@@ -12,8 +12,10 @@ Contents:
    payment
    payment_2.0
    email
+   placeholder
    invoice
    shredder
    customview
+   auth
    general
    quality

doc/development/api/payment.rst

@@ -108,6 +108,8 @@ The provider class
 
    .. automethod:: execute_refund
 
+   .. automethod:: api_payment_details
+
    .. automethod:: shred_payment_info
 
    .. autoattribute:: is_implicit

doc/development/api/placeholder.rst

@@ -0,0 +1,79 @@
+.. highlight:: python
+   :linenothreshold: 5
+
+Writing an e-mail placeholder plugin
+====================================
+
+An email placeholder is a dynamic value that pretix users can use in their email templates.
+
+Please read :ref:`Creating a plugin <pluginsetup>` first, if you haven't already.
+
+Placeholder registration
+------------------------
+
+The placeholder API does not make a lot of usage from signals, however, it
+does use a signal to get a list of all available email placeholders. Your plugin
+should listen for this signal and return an instance of a subclass of ``pretix.base.email.BaseMailTextPlaceholder``::
+
+    from django.dispatch import receiver
+
+    from pretix.base.signals import register_mail_placeholders
+
+
+    @receiver(register_mail_placeholders, dispatch_uid="placeholder_custom")
+    def register_mail_renderers(sender, **kwargs):
+        from .email import MyPlaceholderClass
+        return MyPlaceholder()
+
+
+Context mechanism
+-----------------
+
+Emails are sent in different "contexts" within pretix. For example, many emails are sent in the
+the context of an order, but some are not, such as the notification of a waiting list voucher.
+
+Not all placeholders make sense in every email, and placeholders usually depend some parameters
+themselves, such as the ``Order`` object. Therefore, placeholders are expected to explicitly declare
+what values they depend on and they will only be available in an email if all those dependencies are
+met. Currently, placeholders can depend on the following context parameters:
+
+* ``event``
+* ``order``
+* ``position``
+* ``waiting_list_entry``
+* ``invoice_address``
+* ``payment``
+
+There are a few more that are only to be used internally but not by plugins.
+
+The placeholder class
+---------------------
+
+.. class:: pretix.base.email.BaseMailTextPlaceholder
+
+   .. autoattribute:: identifier
+
+      This is an abstract attribute, you **must** override this!
+
+   .. autoattribute:: required_context
+
+      This is an abstract attribute, you **must** override this!
+
+   .. automethod:: render
+
+      This is an abstract method, you **must** implement this!
+
+   .. automethod:: render_sample
+
+      This is an abstract method, you **must** implement this!
+
+Helper class for simple placeholders
+------------------------------------
+
+pretix ships with a helper class that makes it easy to provide placeholders based on simple
+functions::
+
+     placeholder = SimpleFunctionalMailTextPlaceholder(
+         'code', ['order'], lambda order: order.code, sample='F8VVL'
+     )
+

doc/development/api/shredder.rst

@@ -35,9 +35,9 @@ The shredder class
 
 .. class:: pretix.base.shredder.BaseDataShredder
 
-   The central object of each invoice renderer is the subclass of ``BaseInvoiceRenderer``.
+   The central object of each data shredder is the subclass of ``BaseDataShredder``.
 
-   .. py:attribute:: BaseInvoiceRenderer.event
+   .. py:attribute:: BaseDataShredder.event
 
       The default constructor sets this property to the event we are currently
       working for.

doc/development/api/ticketoutput.rst

@@ -69,3 +69,9 @@ The output class
    .. automethod:: generate_order
 
    .. autoattribute:: download_button_text
+
+   .. autoattribute:: download_button_icon
+
+   .. autoattribute:: preview_allowed
+
+   .. autoattribute:: javascript_required

doc/development/setup.rst

@@ -65,7 +65,7 @@ Then, create the local database::
     python manage.py migrate
 
 A first user with username ``admin@localhost`` and password ``admin`` will be automatically
-created. 
+created.
 
 If you want to see pretix in a different language than English, you have to compile our language
 files::
@@ -81,8 +81,7 @@ To run the local development webserver, execute::
 and head to http://localhost:8000/
 
 As we did not implement an overall front page yet, you need to go directly to
-http://localhost:8000/control/ for the admin view or, if you imported the test
-data as suggested above, to the event page at http://localhost:8000/bigevents/2019/
+http://localhost:8000/control/ for the admin view.
 
 .. note:: If you want the development server to listen on a different interface or
           port (for example because you develop on `pretixdroid`_), you can check

doc/spelling_wordlist.txt

@@ -31,6 +31,7 @@ deprovision
 discoverable
 django
 dockerfile
+downloadable
 durations
 eu
 filename
@@ -41,11 +42,13 @@ formsets
 frontend
 frontpage
 gettext
+giftcard
 gunicorn
 guid
 hardcoded
 hostname
 idempotency
+iframe
 incrementing
 inofficial
 invalidations
@@ -54,6 +57,7 @@ Jimdo
 libpretixprint
 libsass
 linters
+login
 memcached
 metadata
 middleware
@@ -75,6 +79,7 @@ overpayment
 param
 passphrase
 percental
+pluggable
 positionid
 pre
 prepend
@@ -104,6 +109,7 @@ screenshot
 scss
 searchable
 selectable
+serializable
 serializers
 serializers
 sexualized
@@ -135,6 +141,7 @@ username
 url
 versa
 versioning
+viewable
 viewset
 viewsets
 waitinglist

doc/user/events/giftcards.rst

@@ -0,0 +1,71 @@
+.. spelling::
+
+   Warengutschein
+   Wertgutschein
+
+Gift cards
+==========
+
+Gift cards, also known as "gift coupons" or "gift certificates" are a mechanism that allows you to sell tokens that
+can later be used to pay for tickets.
+
+Gift cards are very different feature than **vouchers**. The difference is:
+
+* Vouchers can be used to give a discount. When a voucher is used, the price of a ticket is reduced by the configured
+  discount and sold at a lower price. They therefore reduce both revenue as well as taxes. Vouchers (in pretix) are
+  always specific to a certain product in an order. Vouchers are usually not sold but given out as part of a
+  marketing campaign or to specific groups of people. Vouchers in pretix are bound to a specific event.
+
+* Gift cards are not a discount, but rather a means of payment. If you buy a €20 ticket with a €10 gift card, it is
+  still a €20 ticket and will still count towards your revenue with €20. Gift cards are usually bought for the money
+  that they are worth. Gift cards in pretix can be used across events (and even organizers).
+
+Selling gift cards
+------------------
+
+Selling gift cards works like selling every other type of product in pretix: Create a new product, then head to
+"Additional settings" and select the option "This product is a gift card". Whenever someone buys this product and
+pays for it, a new gift card will be created.
+
+In this case, the gift card code corresponds to the "ticket secret" in the PDF ticket. Therefore, if selling gift cards,
+you can use ticket downloads just as with normal tickets and use our ticket editor to create beautiful gift certificates
+people can give to their loved ones.
+
+Of course, you can use pretix' flexible options to modify your product. For example, you can configure that the customer
+can freely choose the price of the gift card.
+
+.. note::
+
+   pretix currently does not support charging sales tax or VAT when selling gift cards, but instead charges VAT on
+   the full price when the gift card is redeemed. This is the correct behavior in Germany and some other countries for
+   gift cards which are not bound to a very specific service ("Warengutschein"), but instead to a monetary amount
+   ("Wertgutschein").
+
+.. note::
+
+   The ticket PDF will not contain the correct gift card code before the order has been paid, so we recommend not
+   selling gift cards in events where tickets are issued before payments arrive.
+
+
+Accepting gift cards
+--------------------
+
+All your events have have the payment provider "Gift card" enabled by default, but it will only show up in the ticket
+shop once the very first gift card has been issued on your organizer account. Of course, you can turn off gift card
+payments if you do not want them for a specific event.
+
+If gift card payments are enabled, buyers will be able to select "Gift card" as a payment method during checkout. If
+a gift card with a value less than the order total is used, the buyer will be asked to select a second payment method
+for the remaining payment. If a gift card with a value greater than the order total is used, the surplus amount
+remains on the gift card and can be used in a different purchase.
+
+If it possible to accept gift cards across organizer accounts. To do so, you need to have access to both organizer
+accounts. Then, you will see a configuration section at the bottom of the "Gift cards" page of your organizer settings
+where you can specify which gift cards should be accepted.
+
+Manually issuing or using gift cards
+------------------------------------
+
+Of course, you can also issue or redeem gift cards manually through our backend using the "Gift cards" menu item in your
+organizer profile or using our API. These gift cards will be tracked by pretix, but do not correspond to any purchase
+within pretix. You will therefore need to account for them in your books separately.

doc/user/events/widget.rst

@@ -206,6 +206,21 @@ If you want, you can suppress us loading the widget and/or modify the user data
 
 If you then later want to trigger loading the widgets, just call ``window.PretixWidget.buildWidgets()``.
 
+Waiting for the widget to load
+------------------------------
+
+If you want to run custom JavaScript once the widget is fully loaded, you can register a callback function. Note that
+this function might be run multiple times, for example if you have multiple widgets on a page or if the user switches
+e.g. from an event list to an event detail view::
+
+    <script type="text/javascript">
+    window.pretixWidgetCallback = function () {
+        window.PretixWidget.addLoadListener(function () {
+            console.log("Widget has loaded!");
+        });
+    }
+    </script>
+
 
 Passing user data to the widget
 -------------------------------
@@ -274,6 +289,9 @@ Hosted or pretix Enterprise are active, you can pass the following fields:
         };
     </script>
 
+  In some combinations with Google Tag Manager, the widget does not load this way. In this case, try replacing
+  ``tracker.get('clientId')`` with ``ga.getAll()[0].get('clientId')``.
+
 
 .. versionchanged:: 2.3
 

doc/user/index.rst

@@ -12,5 +12,6 @@ wanting to use pretix to sell tickets.
    events/settings
    events/structureguide
    events/widget
+   events/giftcards
    faq
-   markdown
+   markdown

src/MANIFEST.in

@@ -22,3 +22,5 @@ recursive-include pretix/plugins/ticketoutputpdf/templates *
 recursive-include pretix/plugins/ticketoutputpdf/static *
 recursive-include pretix/plugins/badges/templates *
 recursive-include pretix/plugins/badges/static *
+recursive-include pretix/plugins/returnurl/templates *
+recursive-include pretix/plugins/returnurl/static *

src/pretix/__init__.py

@@ -1 +1 @@
-__version__ = "3.0.0"
+__version__ = "3.3.0"

src/pretix/api/migrations/0005_auto_20191028_1541.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2.1 on 2019-10-28 15:41
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixapi', '0004_auto_20190405_1048'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='oauthgrant',
+            name='redirect_uri',
+            field=models.CharField(max_length=2500),
+        ),
+    ]

src/pretix/api/models.py

@@ -43,6 +43,7 @@ class OAuthGrant(AbstractGrant):
         OAuthApplication, on_delete=models.CASCADE
     )
     organizers = models.ManyToManyField('pretixbase.Organizer')
+    redirect_uri = models.CharField(max_length=2500)  # Only 255 in AbstractGrant, which caused problems
 
 
 class OAuthAccessToken(AbstractAccessToken):

src/pretix/api/serializers/cart.py

@@ -82,6 +82,8 @@ class CartPositionCreateSerializer(I18nAwareModelSerializer):
                     seat = self.context['event'].seats.get(seat_guid=validated_data['seat'], subevent=validated_data.get('subevent'))
                 except Seat.DoesNotExist:
                     raise ValidationError('The specified seat does not exist.')
+                except Seat.MultipleObjectsReturned:
+                    raise ValidationError('The specified seat ID is not unique.')
                 else:
                     validated_data['seat'] = seat
                     if not seat.is_available():

src/pretix/api/serializers/checkin.py

@@ -3,6 +3,7 @@ from rest_framework import serializers
 from rest_framework.exceptions import ValidationError
 
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
+from pretix.base.channels import get_all_sales_channels
 from pretix.base.models import CheckinList
 
 
@@ -13,7 +14,7 @@ class CheckinListSerializer(I18nAwareModelSerializer):
     class Meta:
         model = CheckinList
         fields = ('id', 'name', 'all_products', 'limit_products', 'subevent', 'checkin_count', 'position_count',
-                  'include_pending')
+                  'include_pending', 'auto_checkin_sales_channels')
 
     def validate(self, data):
         data = super().validate(data)
@@ -35,4 +36,8 @@ class CheckinListSerializer(I18nAwareModelSerializer):
             if full_data.get('subevent'):
                 raise ValidationError(_('The subevent does not belong to this event.'))
 
+        for channel in full_data.get('auto_checkin_sales_channels') or []:
+            if channel not in get_all_sales_channels():
+                raise ValidationError(_('Unknown sales channel.'))
+
         return data

src/pretix/api/serializers/event.py

@@ -70,7 +70,7 @@ class EventSerializer(I18nAwareModelSerializer):
         model = Event
         fields = ('name', 'slug', 'live', 'testmode', 'currency', 'date_from',
                   'date_to', 'date_admission', 'is_public', 'presale_start',
-                  'presale_end', 'location', 'has_subevents', 'meta_data', 'seating_plan',
+                  'presale_end', 'location', 'geo_lat', 'geo_lon', 'has_subevents', 'meta_data', 'seating_plan',
                   'plugins', 'seat_category_mapping')
 
     def validate(self, data):
@@ -239,6 +239,7 @@ class CloneEventSerializer(EventSerializer):
         plugins = validated_data.pop('plugins', None)
         is_public = validated_data.pop('is_public', None)
         testmode = validated_data.pop('testmode', None)
+        has_subevents = validated_data.pop('has_subevents', None)
         new_event = super().create(validated_data)
 
         event = Event.objects.filter(slug=self.context['event'], organizer=self.context['organizer'].pk).first()
@@ -250,6 +251,8 @@ class CloneEventSerializer(EventSerializer):
             new_event.is_public = is_public
         if testmode is not None:
             new_event.testmode = testmode
+        if has_subevents is not None:
+            new_event.has_subevents = has_subevents
         new_event.save()
 
         return new_event
@@ -277,8 +280,9 @@ class SubEventSerializer(I18nAwareModelSerializer):
     class Meta:
         model = SubEvent
         fields = ('id', 'name', 'date_from', 'date_to', 'active', 'date_admission',
-                  'presale_start', 'presale_end', 'location', 'event', 'is_public', 'seating_plan',
-                  'item_price_overrides', 'variation_price_overrides', 'meta_data', 'seat_category_mapping')
+                  'presale_start', 'presale_end', 'location', 'geo_lat', 'geo_lon', 'event', 'is_public',
+                  'seating_plan', 'item_price_overrides', 'variation_price_overrides', 'meta_data',
+                  'seat_category_mapping')
 
     def validate(self, data):
         data = super().validate(data)

src/pretix/api/serializers/item.py

@@ -119,7 +119,7 @@ class ItemSerializer(I18nAwareModelSerializer):
                   'require_voucher', 'hide_without_voucher', 'allow_cancel', 'require_bundling',
                   'min_per_order', 'max_per_order', 'checkin_attention', 'has_variations', 'variations',
                   'addons', 'bundles', 'original_price', 'require_approval', 'generate_tickets',
-                  'show_quota_left', 'hidden_if_available', 'allow_waitinglist')
+                  'show_quota_left', 'hidden_if_available', 'allow_waitinglist', 'issue_giftcard')
         read_only_fields = ('has_variations', 'picture')
 
     def get_serializer_context(self):
@@ -134,6 +134,17 @@ class ItemSerializer(I18nAwareModelSerializer):
         Item.clean_per_order(data.get('min_per_order'), data.get('max_per_order'))
         Item.clean_available(data.get('available_from'), data.get('available_until'))
 
+        if data.get('issue_giftcard'):
+            if data.get('tax_rule') and data.get('tax_rule').rate > 0:
+                raise ValidationError(
+                    _("Gift card products should not be associated with non-zero tax rates since sales tax will be "
+                      "applied when the gift card is redeemed.")
+                )
+            if data.get('admission'):
+                raise ValidationError(_(
+                    "Gift card products should not be admission products at the same time."
+                ))
+
         return data
 
     def validate_category(self, value):
@@ -219,7 +230,7 @@ class QuestionSerializer(I18nAwareModelSerializer):
         model = Question
         fields = ('id', 'question', 'type', 'required', 'items', 'options', 'position',
                   'ask_during_checkin', 'identifier', 'dependency_question', 'dependency_values',
-                  'hidden', 'dependency_value')
+                  'hidden', 'dependency_value', 'print_on_invoice')
 
     def validate_identifier(self, value):
         Question._clean_identifier(self.context['event'], value, self.instance)
@@ -249,6 +260,9 @@ class QuestionSerializer(I18nAwareModelSerializer):
 
         dep = full_data.get('dependency_question')
         if dep:
+            if dep.ask_during_checkin:
+                raise ValidationError(_('Question cannot depend on a question asked during check-in.'))
+
             seen_ids = {self.instance.pk} if self.instance else set()
             while dep:
                 if dep.pk in seen_ids:

src/pretix/api/serializers/order.py

@@ -1,6 +1,9 @@
 import json
+from collections import Counter
 from decimal import Decimal
 
+import pycountry
+from django.db.models import F, Q
 from django.utils.timezone import now
 from django.utils.translation import ugettext_lazy
 from django_countries.fields import Country
@@ -14,13 +17,17 @@ from pretix.base.channels import get_all_sales_channels
 from pretix.base.i18n import language
 from pretix.base.models import (
     Checkin, Invoice, InvoiceAddress, InvoiceLine, Item, ItemVariation, Order,
-    OrderPosition, Question, QuestionAnswer, Seat, SubEvent,
+    OrderPosition, Question, QuestionAnswer, Seat, SubEvent, Voucher,
 )
 from pretix.base.models.orders import (
     CartPosition, OrderFee, OrderPayment, OrderRefund,
 )
 from pretix.base.pdf import get_variables
+from pretix.base.services.cart import error_messages
+from pretix.base.services.pricing import get_price
+from pretix.base.settings import COUNTRIES_WITH_STATE_IN_ADDRESS
 from pretix.base.signals import register_ticket_outputs
+from pretix.multidomain.urlreverse import build_absolute_uri
 
 
 class CompatibleCountryField(serializers.Field):
@@ -41,8 +48,8 @@ class InvoiceAddressSerializer(I18nAwareModelSerializer):
     class Meta:
         model = InvoiceAddress
         fields = ('last_modified', 'is_business', 'company', 'name', 'name_parts', 'street', 'zipcode', 'city', 'country',
-                  'vat_id', 'vat_id_validated', 'internal_reference')
-        read_only_fields = ('last_modified', 'vat_id_validated')
+                  'state', 'vat_id', 'vat_id_validated', 'internal_reference')
+        read_only_fields = ('last_modified',)
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -57,6 +64,24 @@ class InvoiceAddressSerializer(I18nAwareModelSerializer):
             )
         if data.get('name_parts') and '_scheme' not in data.get('name_parts'):
             data['name_parts']['_scheme'] = self.context['request'].event.settings.name_scheme
+
+        if data.get('country'):
+            if not pycountry.countries.get(alpha_2=data.get('country')):
+                raise ValidationError(
+                    {'country': ['Invalid country code.']}
+                )
+
+        if data.get('state'):
+            cc = str(data.get('country') or self.instance.country or '')
+            if cc not in COUNTRIES_WITH_STATE_IN_ADDRESS:
+                raise ValidationError(
+                    {'state': ['States are not supported in country "{}".'.format(cc)]}
+                )
+            if not pycountry.subdivisions.get(code=cc + '-' + data.get('state')):
+                raise ValidationError(
+                    {'state': ['"{}" is not a known subdivision of the country "{}".'.format(data.get('state'), cc)]}
+                )
+
         return data
 
 
@@ -89,7 +114,7 @@ class AnswerSerializer(I18nAwareModelSerializer):
 class CheckinSerializer(I18nAwareModelSerializer):
     class Meta:
         model = Checkin
-        fields = ('datetime', 'list')
+        fields = ('datetime', 'list', 'auto_checked_in')
 
 
 class OrderDownloadsField(serializers.Field):
@@ -261,10 +286,33 @@ class OrderFeeSerializer(I18nAwareModelSerializer):
         fields = ('fee_type', 'value', 'description', 'internal_type', 'tax_rate', 'tax_value', 'tax_rule')
 
 
+class PaymentURLField(serializers.URLField):
+    def to_representation(self, instance: OrderPayment):
+        if instance.state != OrderPayment.PAYMENT_STATE_CREATED:
+            return None
+        return build_absolute_uri(self.context['event'], 'presale:event.order.pay', kwargs={
+            'order': instance.order.code,
+            'secret': instance.order.secret,
+            'payment': instance.pk,
+        })
+
+
+class PaymentDetailsField(serializers.Field):
+    def to_representation(self, value: OrderPayment):
+        pp = value.payment_provider
+        if not pp:
+            return {}
+        return pp.api_payment_details(value)
+
+
 class OrderPaymentSerializer(I18nAwareModelSerializer):
+    payment_url = PaymentURLField(source='*', allow_null=True, read_only=True)
+    details = PaymentDetailsField(source='*', allow_null=True, read_only=True)
+
     class Meta:
         model = OrderPayment
-        fields = ('local_id', 'state', 'amount', 'created', 'payment_date', 'provider')
+        fields = ('local_id', 'state', 'amount', 'created', 'payment_date', 'provider', 'payment_url',
+                  'details')
 
 
 class OrderRefundSerializer(I18nAwareModelSerializer):
@@ -275,6 +323,14 @@ class OrderRefundSerializer(I18nAwareModelSerializer):
         fields = ('local_id', 'state', 'source', 'amount', 'payment', 'created', 'execution_date', 'provider')
 
 
+class OrderURLField(serializers.URLField):
+    def to_representation(self, instance: Order):
+        return build_absolute_uri(self.context['event'], 'presale:event.order', kwargs={
+            'order': instance.code,
+            'secret': instance.secret,
+        })
+
+
 class OrderSerializer(I18nAwareModelSerializer):
     invoice_address = InvoiceAddressSerializer(allow_null=True)
     positions = OrderPositionSerializer(many=True, read_only=True)
@@ -284,13 +340,15 @@ class OrderSerializer(I18nAwareModelSerializer):
     refunds = OrderRefundSerializer(many=True, read_only=True)
     payment_date = OrderPaymentDateField(source='*', read_only=True)
     payment_provider = OrderPaymentTypeField(source='*', read_only=True)
+    url = OrderURLField(source='*', read_only=True)
 
     class Meta:
         model = Order
         fields = (
             'code', 'status', 'testmode', 'secret', 'email', 'locale', 'datetime', 'expires', 'payment_date',
             'payment_provider', 'fees', 'total', 'comment', 'invoice_address', 'positions', 'downloads',
-            'checkin_attention', 'last_modified', 'payments', 'refunds', 'require_approval', 'sales_channel'
+            'checkin_attention', 'last_modified', 'payments', 'refunds', 'require_approval', 'sales_channel',
+            'url'
         )
         read_only_fields = (
             'code', 'status', 'testmode', 'secret', 'datetime', 'expires', 'payment_date',
@@ -329,7 +387,7 @@ class OrderSerializer(I18nAwareModelSerializer):
                     }
                 try:
                     ia = instance.invoice_address
-                    if iadata.get('vat_id') != ia.vat_id:
+                    if iadata.get('vat_id') != ia.vat_id and 'vat_id_validated' not in iadata:
                         ia.vat_id_validated = False
                     self.fields['invoice_address'].update(ia, iadata)
                 except InvoiceAddress.DoesNotExist:
@@ -437,11 +495,15 @@ class OrderPositionCreateSerializer(I18nAwareModelSerializer):
     secret = serializers.CharField(required=False)
     attendee_name = serializers.CharField(required=False, allow_null=True)
     seat = serializers.CharField(required=False, allow_null=True)
+    price = serializers.DecimalField(required=False, allow_null=True, decimal_places=2,
+                                     max_digits=10)
+    voucher = serializers.SlugRelatedField(slug_field='code', queryset=Voucher.objects.none(),
+                                           required=False, allow_null=True)
 
     class Meta:
         model = OrderPosition
         fields = ('positionid', 'item', 'variation', 'price', 'attendee_name', 'attendee_name_parts', 'attendee_email',
-                  'secret', 'addon_to', 'subevent', 'answers', 'seat')
+                  'secret', 'addon_to', 'subevent', 'answers', 'seat', 'voucher')
 
     def validate_secret(self, secret):
         if secret and OrderPosition.all.filter(order__event=self.context['event'], secret=secret).exists():
@@ -515,7 +577,7 @@ class CompatibleJSONField(serializers.JSONField):
 
 class OrderCreateSerializer(I18nAwareModelSerializer):
     invoice_address = InvoiceAddressSerializer(required=False)
-    positions = OrderPositionCreateSerializer(many=True, required=False)
+    positions = OrderPositionCreateSerializer(many=True, required=True)
     fees = OrderFeeCreateSerializer(many=True, required=False)
     status = serializers.ChoiceField(choices=(
         ('n', Order.STATUS_PENDING),
@@ -527,18 +589,26 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
         min_length=5
     )
     comment = serializers.CharField(required=False, allow_blank=True)
-    payment_provider = serializers.CharField(required=True)
+    payment_provider = serializers.CharField(required=False, allow_null=True)
     payment_info = CompatibleJSONField(required=False)
     consume_carts = serializers.ListField(child=serializers.CharField(), required=False)
     force = serializers.BooleanField(default=False, required=False)
     payment_date = serializers.DateTimeField(required=False, allow_null=True)
+    send_mail = serializers.BooleanField(default=False, required=False)
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.fields['positions'].child.fields['voucher'].queryset = self.context['event'].vouchers.all()
 
     class Meta:
         model = Order
         fields = ('code', 'status', 'testmode', 'email', 'locale', 'payment_provider', 'fees', 'comment', 'sales_channel',
-                  'invoice_address', 'positions', 'checkin_attention', 'payment_info', 'payment_date', 'consume_carts', 'force')
+                  'invoice_address', 'positions', 'checkin_attention', 'payment_info', 'payment_date', 'consume_carts',
+                  'force', 'send_mail')
 
     def validate_payment_provider(self, pp):
+        if pp is None:
+            return None
         if pp not in self.context['event'].get_payment_providers():
             raise ValidationError('The given payment provider is not known.')
         return pp
@@ -605,13 +675,28 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
             raise ValidationError(errs)
         return data
 
+    def validate_testmode(self, testmode):
+        if 'sales_channel' in self.initial_data:
+            try:
+                sales_channel = get_all_sales_channels()[self.initial_data['sales_channel']]
+
+                if testmode and not sales_channel.testmode_supported:
+                    raise ValidationError('This sales channel does not provide support for testmode.')
+            except KeyError:
+                # We do not need to raise a ValidationError here, since there is another check to validate the
+                # sales_channel
+                pass
+
+        return testmode
+
     def create(self, validated_data):
         fees_data = validated_data.pop('fees') if 'fees' in validated_data else []
         positions_data = validated_data.pop('positions') if 'positions' in validated_data else []
-        payment_provider = validated_data.pop('payment_provider')
+        payment_provider = validated_data.pop('payment_provider', None)
         payment_info = validated_data.pop('payment_info', '{}')
         payment_date = validated_data.pop('payment_date', now())
         force = validated_data.pop('force', False)
+        self._send_mail = validated_data.pop('send_mail', False)
 
         if 'invoice_address' in validated_data:
             iadata = validated_data.pop('invoice_address')
@@ -630,8 +715,11 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
             consume_carts = validated_data.pop('consume_carts', [])
             delete_cps = []
             quota_avail_cache = {}
+            voucher_usage = Counter()
             if consume_carts:
-                for cp in CartPosition.objects.filter(event=self.context['event'], cart_id__in=consume_carts):
+                for cp in CartPosition.objects.filter(
+                    event=self.context['event'], cart_id__in=consume_carts, expires__gt=now()
+                ):
                     quotas = (cp.variation.quotas.filter(subevent=cp.subevent)
                               if cp.variation else cp.item.quotas.filter(subevent=cp.subevent))
                     for quota in quotas:
@@ -639,6 +727,8 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                             quota_avail_cache[quota] = list(quota.availability())
                         if quota_avail_cache[quota][1] is not None:
                             quota_avail_cache[quota][1] += 1
+                    if cp.voucher:
+                        voucher_usage[cp.voucher] -= 1
                     if cp.expires > now_dt:
                         if cp.seat:
                             free_seats.add(cp.seat)
@@ -646,8 +736,55 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
 
             errs = [{} for p in positions_data]
 
+            for i, pos_data in enumerate(positions_data):
+                if pos_data.get('voucher'):
+                    v = pos_data['voucher']
+
+                    if not v.applies_to(pos_data['item'], pos_data.get('variation')):
+                        errs[i]['voucher'] = [error_messages['voucher_invalid_item']]
+                        continue
+
+                    if v.subevent_id and pos_data.get('subevent').pk != v.subevent_id:
+                        errs[i]['voucher'] = [error_messages['voucher_invalid_subevent']]
+                        continue
+
+                    if v.valid_until is not None and v.valid_until < now_dt:
+                        errs[i]['voucher'] = [error_messages['voucher_expired']]
+                        continue
+
+                    voucher_usage[v] += 1
+                    if voucher_usage[v] > 0:
+                        redeemed_in_carts = CartPosition.objects.filter(
+                            Q(voucher=pos_data['voucher']) & Q(event=self.context['event']) & Q(expires__gte=now_dt)
+                        ).exclude(pk__in=[cp.pk for cp in delete_cps])
+                        v_avail = v.max_usages - v.redeemed - redeemed_in_carts.count()
+                        if v_avail < voucher_usage[v]:
+                            errs[i]['voucher'] = [
+                                'The voucher has already been used the maximum number of times.'
+                            ]
+
+                seated = pos_data.get('item').seat_category_mappings.filter(subevent=pos_data.get('subevent')).exists()
+                if pos_data.get('seat'):
+                    if not seated:
+                        errs[i]['seat'] = ['The specified product does not allow to choose a seat.']
+                    try:
+                        seat = self.context['event'].seats.get(seat_guid=pos_data['seat'], subevent=pos_data.get('subevent'))
+                    except Seat.DoesNotExist:
+                        errs[i]['seat'] = ['The specified seat does not exist.']
+                    else:
+                        pos_data['seat'] = seat
+                        if (seat not in free_seats and not seat.is_available()) or seat in seats_seen:
+                            errs[i]['seat'] = [ugettext_lazy('The selected seat "{seat}" is not available.').format(seat=seat.name)]
+                        seats_seen.add(seat)
+                elif seated:
+                    errs[i]['seat'] = ['The specified product requires to choose a seat.']
+
             if not force:
                 for i, pos_data in enumerate(positions_data):
+                    if pos_data.get('voucher'):
+                        if pos_data['voucher'].allow_ignore_quota or pos_data['voucher'].block_quota:
+                            continue
+
                     new_quotas = (pos_data.get('variation').quotas.filter(subevent=pos_data.get('subevent'))
                                   if pos_data.get('variation')
                                   else pos_data.get('item').quotas.filter(subevent=pos_data.get('subevent')))
@@ -669,23 +806,6 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                                         )
                                     ]
 
-            for i, pos_data in enumerate(positions_data):
-                seated = pos_data.get('item').seat_category_mappings.filter(subevent=pos_data.get('subevent')).exists()
-                if pos_data.get('seat'):
-                    if not seated:
-                        errs[i]['seat'] = ['The specified product does not allow to choose a seat.']
-                    try:
-                        seat = self.context['event'].seats.get(seat_guid=pos_data['seat'], subevent=pos_data.get('subevent'))
-                    except Seat.DoesNotExist:
-                        errs[i]['seat'] = ['The specified seat does not exist.']
-                    else:
-                        pos_data['seat'] = seat
-                        if (seat not in free_seats and not seat.is_available()) or seat in seats_seen:
-                            errs[i]['seat'] = [ugettext_lazy('The selected seat "{seat}" is not available.').format(seat=seat.name)]
-                        seats_seen.add(seat)
-                elif seated:
-                    errs[i]['seat'] = ['The specified product requires to choose a seat.']
-
             if any(errs):
                 raise ValidationError({'positions': errs})
 
@@ -693,38 +813,14 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                 validated_data['locale'] = self.context['event'].settings.locale
             order = Order(event=self.context['event'], **validated_data)
             order.set_expires(subevents=[p.get('subevent') for p in positions_data])
-            order.total = sum([p['price'] for p in positions_data]) + sum([f['value'] for f in fees_data], Decimal('0.00'))
             order.meta_info = "{}"
+            order.total = Decimal('0.00')
             order.save()
 
-            if order.total == Decimal('0.00') and validated_data.get('status') != Order.STATUS_PAID:
-                order.status = Order.STATUS_PAID
-                order.save()
-                order.payments.create(
-                    amount=order.total, provider='free', state=OrderPayment.PAYMENT_STATE_CONFIRMED,
-                    payment_date=now()
-                )
-            elif payment_provider == "free" and order.total != Decimal('0.00'):
-                raise ValidationError('You cannot use the "free" payment provider for non-free orders.')
-            elif validated_data.get('status') == Order.STATUS_PAID:
-                order.payments.create(
-                    amount=order.total,
-                    provider=payment_provider,
-                    info=payment_info,
-                    payment_date=payment_date,
-                    state=OrderPayment.PAYMENT_STATE_CONFIRMED
-                )
-            elif payment_provider:
-                order.payments.create(
-                    amount=order.total,
-                    provider=payment_provider,
-                    info=payment_info,
-                    state=OrderPayment.PAYMENT_STATE_CREATED
-                )
-
             if ia:
                 ia.order = order
                 ia.save()
+
             pos_map = {}
             for pos_data in positions_data:
                 answers_data = pos_data.pop('answers', [])
@@ -736,9 +832,27 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                     }
                 pos = OrderPosition(**pos_data)
                 pos.order = order
-                pos._calculate_tax()
                 if addon_to:
                     pos.addon_to = pos_map[addon_to]
+
+                if pos.price is None:
+                    price = get_price(
+                        item=pos.item,
+                        variation=pos.variation,
+                        voucher=pos.voucher,
+                        custom_price=None,
+                        subevent=pos.subevent,
+                        addon_to=pos.addon_to,
+                        invoice_address=ia,
+                    )
+                    pos.price = price.gross
+                    pos.tax_rate = price.rate
+                    pos.tax_value = price.tax
+                    pos.tax_rule = pos.item.tax_rule
+                else:
+                    pos._calculate_tax()
+                if pos.voucher:
+                    Voucher.objects.filter(pk=pos.voucher.pk).update(redeemed=F('redeemed') + 1)
                 pos.save()
                 pos_map[pos.positionid] = pos
                 for answ_data in answers_data:
@@ -748,12 +862,46 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
 
             for cp in delete_cps:
                 cp.delete()
+
         for fee_data in fees_data:
             f = OrderFee(**fee_data)
             f.order = order
             f._calculate_tax()
             f.save()
 
+        order.total = sum([p.price for p in order.positions.all()]) + sum([f.value for f in order.fees.all()])
+        order.save(update_fields=['total'])
+
+        if order.total == Decimal('0.00') and validated_data.get('status') == Order.STATUS_PAID and not payment_provider:
+            payment_provider = 'free'
+
+        if order.total == Decimal('0.00') and validated_data.get('status') != Order.STATUS_PAID:
+            order.status = Order.STATUS_PAID
+            order.save()
+            order.payments.create(
+                amount=order.total, provider='free', state=OrderPayment.PAYMENT_STATE_CONFIRMED,
+                payment_date=now()
+            )
+        elif payment_provider == "free" and order.total != Decimal('0.00'):
+            raise ValidationError('You cannot use the "free" payment provider for non-free orders.')
+        elif validated_data.get('status') == Order.STATUS_PAID:
+            if not payment_provider:
+                raise ValidationError('You cannot create a paid order without a payment provider.')
+            order.payments.create(
+                amount=order.total,
+                provider=payment_provider,
+                info=payment_info,
+                payment_date=payment_date,
+                state=OrderPayment.PAYMENT_STATE_CONFIRMED
+            )
+        elif payment_provider:
+            order.payments.create(
+                amount=order.total,
+                provider=payment_provider,
+                info=payment_info,
+                state=OrderPayment.PAYMENT_STATE_CREATED
+            )
+
         return order
 
 

src/pretix/api/serializers/organizer.py

@@ -1,6 +1,11 @@
+from django.db.models import Q
+from django.utils.translation import ugettext_lazy as _
+from rest_framework import serializers
+from rest_framework.exceptions import ValidationError
+
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
 from pretix.api.serializers.order import CompatibleJSONField
-from pretix.base.models import Organizer, SeatingPlan
+from pretix.base.models import GiftCard, Organizer, SeatingPlan
 from pretix.base.models.seating import SeatingPlanLayoutValidator
 
 
@@ -18,3 +23,27 @@ class SeatingPlanSerializer(I18nAwareModelSerializer):
     class Meta:
         model = SeatingPlan
         fields = ('id', 'name', 'layout')
+
+
+class GiftCardSerializer(I18nAwareModelSerializer):
+    value = serializers.DecimalField(max_digits=10, decimal_places=2)
+
+    def validate(self, data):
+        data = super().validate(data)
+        s = data['secret']
+        qs = GiftCard.objects.filter(
+            secret=s
+        ).filter(
+            Q(issuer=self.context["organizer"]) | Q(issuer__gift_card_collector_acceptance__collector=self.context["organizer"])
+        )
+        if self.instance:
+            qs = qs.exclude(pk=self.instance.pk)
+        if qs.exists():
+            raise ValidationError(
+                {'secret': _('A gift card with the same secret already exists in your or an affiliated organizer account.')}
+            )
+        return data
+
+    class Meta:
+        model = GiftCard
+        fields = ('id', 'secret', 'issuance', 'value', 'currency', 'testmode')

src/pretix/api/urls.py

@@ -19,6 +19,7 @@ orga_router.register(r'events', event.EventViewSet)
 orga_router.register(r'subevents', event.SubEventViewSet)
 orga_router.register(r'webhooks', webhooks.WebHookViewSet)
 orga_router.register(r'seatingplans', organizer.SeatingPlanViewSet)
+orga_router.register(r'giftcards', organizer.GiftCardViewSet)
 
 event_router = routers.DefaultRouter()
 event_router.register(r'subevents', event.SubEventViewSet)

src/pretix/api/views/checkin.py

@@ -44,7 +44,6 @@ class CheckinListViewSet(viewsets.ModelViewSet):
         qs = self.request.event.checkin_lists.prefetch_related(
             'limit_products',
         )
-        qs = CheckinList.annotate_with_numbers(qs, self.request.event)
         return qs
 
     def perform_create(self, serializer):

src/pretix/api/views/event.py

@@ -18,6 +18,7 @@ from pretix.base.models import (
 )
 from pretix.base.models.event import SubEvent
 from pretix.helpers.dicts import merge_dicts
+from pretix.presale.views.organizer import filter_qs_by_attr
 
 with scopes_disabled():
     class EventFilter(FilterSet):
@@ -85,6 +86,8 @@ class EventViewSet(viewsets.ModelViewSet):
                 organizer=self.request.organizer
             )
 
+        qs = filter_qs_by_attr(qs, self.request)
+
         return qs.prefetch_related(
             'meta_values', 'meta_values__property', 'seat_category_mappings'
         )
@@ -241,6 +244,9 @@ class SubEventViewSet(ConditionalListView, viewsets.ModelViewSet):
                 event__organizer=self.request.organizer,
                 event__in=self.request.user.get_events_with_any_permission()
             )
+
+        qs = filter_qs_by_attr(qs, self.request)
+
         return qs.prefetch_related(
             'subeventitem_set', 'subeventitemvariation_set', 'seat_category_mappings'
         )

src/pretix/api/views/order.py

@@ -6,7 +6,7 @@ import pytz
 from django.db import transaction
 from django.db.models import F, Prefetch, Q
 from django.db.models.functions import Coalesce, Concat
-from django.http import FileResponse
+from django.http import FileResponse, HttpResponse
 from django.shortcuts import get_object_or_404
 from django.utils.timezone import make_aware, now
 from django.utils.translation import ugettext as _
@@ -41,7 +41,8 @@ from pretix.base.services.invoices import (
 )
 from pretix.base.services.mail import SendMailException
 from pretix.base.services.orders import (
-    OrderChangeManager, OrderError, approve_order, cancel_order, deny_order,
+    OrderChangeManager, OrderError, _order_placed_email,
+    _order_placed_email_attendee, approve_order, cancel_order, deny_order,
     extend_order, mark_order_expired, mark_order_refunded,
 )
 from pretix.base.services.pricing import get_price
@@ -147,12 +148,16 @@ class OrderViewSet(viewsets.ModelViewSet):
             generate.apply_async(args=('order', order.pk, provider.identifier))
             raise RetryException()
         else:
-            resp = FileResponse(ct.file.file, content_type=ct.type)
-            resp['Content-Disposition'] = 'attachment; filename="{}-{}-{}{}"'.format(
-                self.request.event.slug.upper(), order.code,
-                provider.identifier, ct.extension
-            )
-            return resp
+            if ct.type == 'text/uri-list':
+                resp = HttpResponse(ct.file.file.read(), content_type='text/uri-list')
+                return resp
+            else:
+                resp = FileResponse(ct.file.file, content_type=ct.type)
+                resp['Content-Disposition'] = 'attachment; filename="{}-{}-{}{}"'.format(
+                    self.request.event.slug.upper(), order.code,
+                    provider.identifier, ct.extension
+                )
+                return resp
 
     @action(detail=True, methods=['POST'])
     def mark_paid(self, request, **kwargs):
@@ -431,6 +436,7 @@ class OrderViewSet(viewsets.ModelViewSet):
         serializer.is_valid(raise_exception=True)
         with transaction.atomic():
             self.perform_create(serializer)
+            send_mail = serializer._send_mail
             order = serializer.instance
             serializer = OrderSerializer(order, context=serializer.context)
 
@@ -439,14 +445,50 @@ class OrderViewSet(viewsets.ModelViewSet):
                 user=request.user if request.user.is_authenticated else None,
                 auth=request.auth,
             )
-        order_placed.send(self.request.event, order=order)
 
-        gen_invoice = invoice_qualified(order) and (
-            (order.event.settings.get('invoice_generate') == 'True') or
-            (order.event.settings.get('invoice_generate') == 'paid' and order.status == Order.STATUS_PAID)
-        ) and not order.invoices.last()
-        if gen_invoice:
-            generate_invoice(order, trigger_pdf=True)
+        with language(order.locale):
+            order_placed.send(self.request.event, order=order)
+
+            gen_invoice = invoice_qualified(order) and (
+                (order.event.settings.get('invoice_generate') == 'True') or
+                (order.event.settings.get('invoice_generate') == 'paid' and order.status == Order.STATUS_PAID)
+            ) and not order.invoices.last()
+            invoice = None
+            if gen_invoice:
+                invoice = generate_invoice(order, trigger_pdf=True)
+
+            if send_mail:
+                payment = order.payments.last()
+                free_flow = (
+                    payment and order.total == Decimal('0.00') and order.status == Order.STATUS_PAID and
+                    not order.require_approval and payment.provider == "free"
+                )
+                if free_flow:
+                    email_template = request.event.settings.mail_text_order_free
+                    log_entry = 'pretix.event.order.email.order_free'
+                    email_attendees = request.event.settings.mail_send_order_free_attendee
+                    email_attendees_template = request.event.settings.mail_text_order_free_attendee
+                else:
+                    email_template = request.event.settings.mail_text_order_placed
+                    log_entry = 'pretix.event.order.email.order_placed'
+                    email_attendees = request.event.settings.mail_send_order_placed_attendee
+                    email_attendees_template = request.event.settings.mail_text_order_placed_attendee
+
+                _order_placed_email(
+                    request.event, order, payment.payment_provider if payment else None, email_template,
+                    log_entry, invoice, payment
+                )
+                if email_attendees:
+                    for p in order.positions.all():
+                        if p.addon_to_id is None and p.attendee_email and p.attendee_email != order.email:
+                            _order_placed_email_attendee(request.event, order, p, email_attendees_template, log_entry)
+
+                if not free_flow and order.status == Order.STATUS_PAID and payment:
+                    payment._send_paid_mail(invoice, None, '')
+                    if self.request.event.settings.mail_send_order_paid_attendee:
+                        for p in order.positions.all():
+                            if p.addon_to_id is None and p.attendee_email and p.attendee_email != order.email:
+                                payment._send_paid_mail_attendee(p, None)
 
         headers = self.get_success_headers(serializer.data)
         return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
@@ -723,12 +765,16 @@ class OrderPositionViewSet(mixins.DestroyModelMixin, viewsets.ReadOnlyModelViewS
             generate.apply_async(args=('orderposition', pos.pk, provider.identifier))
             raise RetryException()
         else:
-            resp = FileResponse(ct.file.file, content_type=ct.type)
-            resp['Content-Disposition'] = 'attachment; filename="{}-{}-{}-{}{}"'.format(
-                self.request.event.slug.upper(), pos.order.code, pos.positionid,
-                provider.identifier, ct.extension
-            )
-            return resp
+            if ct.type == 'text/uri-list':
+                resp = HttpResponse(ct.file.file.read(), content_type='text/uri-list')
+                return resp
+            else:
+                resp = FileResponse(ct.file.file, content_type=ct.type)
+                resp['Content-Disposition'] = 'attachment; filename="{}-{}-{}-{}{}"'.format(
+                    self.request.event.slug.upper(), pos.order.code, pos.positionid,
+                    provider.identifier, ct.extension
+                )
+                return resp
 
     def perform_destroy(self, instance):
         try:

src/pretix/api/views/organizer.py

@@ -1,11 +1,14 @@
-from rest_framework import filters, viewsets
-from rest_framework.exceptions import PermissionDenied
+from django.db import transaction
+from rest_framework import filters, serializers, status, viewsets
+from rest_framework.decorators import action
+from rest_framework.exceptions import MethodNotAllowed, PermissionDenied
+from rest_framework.response import Response
 
 from pretix.api.models import OAuthAccessToken
 from pretix.api.serializers.organizer import (
-    OrganizerSerializer, SeatingPlanSerializer,
+    GiftCardSerializer, OrganizerSerializer, SeatingPlanSerializer,
 )
-from pretix.base.models import Organizer, SeatingPlan
+from pretix.base.models import GiftCard, Organizer, SeatingPlan
 from pretix.helpers.dicts import merge_dicts
 
 
@@ -81,3 +84,66 @@ class SeatingPlanViewSet(viewsets.ModelViewSet):
             data={'id': instance.pk}
         )
         instance.delete()
+
+
+class GiftCardViewSet(viewsets.ModelViewSet):
+    serializer_class = GiftCardSerializer
+    queryset = GiftCard.objects.none()
+    permission = 'can_manage_gift_cards'
+    write_permission = 'can_manage_gift_cards'
+
+    def get_queryset(self):
+        return self.request.organizer.issued_gift_cards.all()
+
+    def get_serializer_context(self):
+        ctx = super().get_serializer_context()
+        ctx['organizer'] = self.request.organizer
+        return ctx
+
+    @transaction.atomic()
+    def perform_create(self, serializer):
+        value = serializer.validated_data.pop('value')
+        inst = serializer.save(issuer=self.request.organizer)
+        inst.transactions.create(value=value)
+        inst.log_action(
+            'pretix.giftcards.transaction.manual',
+            user=self.request.user,
+            auth=self.request.auth,
+            data=merge_dicts(self.request.data, {'id': inst.pk})
+        )
+
+    @transaction.atomic()
+    def perform_update(self, serializer):
+        GiftCard.objects.select_for_update().get(pk=self.get_object().pk)
+        old_value = serializer.instance.value
+        value = serializer.validated_data.pop('value')
+        inst = serializer.save(secret=serializer.instance.secret, currency=serializer.instance.currency,
+                               testmode=serializer.instance.testmode)
+        diff = value - old_value
+        inst.transactions.create(value=diff)
+        inst.log_action(
+            'pretix.giftcards.transaction.manual',
+            user=self.request.user,
+            auth=self.request.auth,
+            data={'value': diff}
+        )
+        return inst
+
+    @action(detail=True, methods=["POST"])
+    @transaction.atomic()
+    def transact(self, request, **kwargs):
+        gc = GiftCard.objects.select_for_update().get(pk=self.get_object().pk)
+        value = serializers.DecimalField(max_digits=10, decimal_places=2).to_internal_value(
+            request.data.get('value')
+        )
+        gc.transactions.create(value=value)
+        gc.log_action(
+            'pretix.giftcards.transaction.manual',
+            user=self.request.user,
+            auth=self.request.auth,
+            data={'value': value}
+        )
+        return Response(GiftCardSerializer(gc).data, status=status.HTTP_200_OK)
+
+    def perform_destroy(self, instance):
+        raise MethodNotAllowed("Gift cards cannot be deleted.")

src/pretix/base/__init__.py

@@ -13,7 +13,7 @@ class PretixBaseConfig(AppConfig):
         from . import invoice  # NOQA
         from . import notifications  # NOQA
         from . import email  # NOQA
-        from .services import auth, export, mail, tickets, cart, orders, invoices, cleanup, update_check, quotas, notifications  # NOQA
+        from .services import auth, checkin, export, mail, tickets, cart, orders, invoices, cleanup, update_check, quotas, notifications, vouchers  # NOQA
 
         try:
             from .celery_app import app as celery_app  # NOQA

src/pretix/base/auth.py

@@ -0,0 +1,109 @@
+from collections import OrderedDict
+from importlib import import_module
+
+from django import forms
+from django.conf import settings
+from django.contrib.auth import authenticate
+from django.utils.translation import gettext_lazy as _
+
+
+def get_auth_backends():
+    backends = {}
+    for b in settings.PRETIX_AUTH_BACKENDS:
+        mod, name = b.rsplit('.', 1)
+        b = getattr(import_module(mod), name)()
+        backends[b.identifier] = b
+    return backends
+
+
+class BaseAuthBackend:
+    """
+    This base class defines the interface that needs to be implemented by every class that supplies
+    an authentication method to pretix. Please note that pretix authentication backends are different
+    from plain Django authentication backends! Be sure to read the documentation chapter on authentication
+    backends before you implement one.
+    """
+
+    @property
+    def identifier(self):
+        """
+        A short and unique identifier for this authentication backend.
+        This should only contain lowercase letters and in most cases will
+        be the same as your package name.
+        """
+        raise NotImplementedError()
+
+    @property
+    def verbose_name(self):
+        """
+        A human-readable name of this authentication backend.
+        """
+        raise NotImplementedError()
+
+    @property
+    def visible(self):
+        """
+        Whether or not this backend can be selected by users actively. Set this to ``False``
+        if you only implement ``request_authenticate``.
+        """
+        return True
+
+    @property
+    def login_form_fields(self) -> dict:
+        """
+        This property may return form fields that the user needs to fill in to log in.
+        """
+        return {}
+
+    def form_authenticate(self, request, form_data):
+        """
+        This method will be called after the user filled in the login form. ``request`` will contain
+        the current request and ``form_data`` the input for the form fields defined in ``login_form_fields``.
+        You are expected to either return a ``User`` object (if login was successful) or ``None``.
+        """
+        return
+
+    def request_authenticate(self, request):
+        """
+        This method will be called when the user opens the login form. If the user already has a valid session
+        according to your login mechanism, for example a cookie set by a different system or HTTP header set by a
+        reverse proxy, you can directly return a ``User`` object that will be logged in.
+
+        ``request`` will contain the current request.
+        You are expected to either return a ``User`` object (if login was successful) or ``None``.
+        """
+        return
+
+    def authentication_url(self, request):
+        """
+        This method will be called to populate the URL for your authentication method's tab on the login page.
+        For example, if your method works through OAuth, you could return the URL of the OAuth authorization URL the
+        user needs to visit.
+
+        If you return ``None`` (the default), the link will point to a page that shows the form defined by
+        ``login_form_fields``.
+        """
+        return
+
+
+class NativeAuthBackend(BaseAuthBackend):
+    identifier = 'native'
+    verbose_name = _('pretix User')
+
+    @property
+    def login_form_fields(self) -> dict:
+        """
+        This property may return form fields that the user needs to fill in
+        to log in.
+        """
+        d = OrderedDict([
+            ('email', forms.EmailField(label=_("E-mail"), max_length=254,
+                                       widget=forms.EmailInput(attrs={'autofocus': 'autofocus'}))),
+            ('password', forms.CharField(label=_("Password"), widget=forms.PasswordInput)),
+        ])
+        return d
+
+    def form_authenticate(self, request, form_data):
+        u = authenticate(request=request, email=form_data['email'].lower(), password=form_data['password'])
+        if u and u.auth_backend == self.identifier:
+            return u

src/pretix/base/banlist.py

@@ -0,0 +1,80 @@
+import re
+
+# banlist based on http://www.bannedwordlist.com/lists/swearWords.txt
+banlist = [
+    "anal",
+    "anus",
+    "arse",
+    "ass",
+    "balls",
+    "bastard",
+    "bitch",
+    "biatch",
+    "bloody",
+    "blowjob",
+    "bollock",
+    "bollok",
+    "boner",
+    "boob",
+    "bugger",
+    "bum",
+    "butt",
+    "clitoris",
+    "cock",
+    "coon",
+    "crap",
+    "cunt",
+    "damn",
+    "dick",
+    "dildo",
+    "dyke",
+    "fag",
+    "feck",
+    "fellate",
+    "fellatio",
+    "felching",
+    "fuck",
+    "fudgepacker",
+    "flange",
+    "goddamn",
+    "hell",
+    "homo",
+    "jerk",
+    "jizz",
+    "knobend",
+    "labia",
+    "lmao",
+    "lmfao",
+    "muff",
+    "nigger",
+    "nigga",
+    "omg",
+    "penis",
+    "piss",
+    "poop",
+    "prick",
+    "pube",
+    "pussy",
+    "queer",
+    "scrotum",
+    "sex",
+    "shit",
+    "sh1t",
+    "slut",
+    "smegma",
+    "spunk",
+    "tit",
+    "tosser",
+    "turd",
+    "twat",
+    "vagina",
+    "wank",
+    "whore",
+    "wtf"
+]
+
+blacklist_regex = re.compile('(' + '|'.join(banlist) + ')')
+
+
+def banned(string):
+    return bool(blacklist_regex.search(string.lower()))

src/pretix/base/channels.py

@@ -35,6 +35,13 @@ class SalesChannel:
         """
         return "circle"
 
+    @property
+    def testmode_supported(self) -> bool:
+        """
+        Indication, if a saleschannels supports test mode orders
+        """
+        return True
+
 
 def get_all_sales_channels():
     global _ALL_CHANNELS

src/pretix/base/context.py

@@ -0,0 +1,15 @@
+import sys
+
+from django.conf import settings
+
+
+def contextprocessor(request):
+    ctx = {
+        'rtl': getattr(request, 'LANGUAGE_CODE', 'en') in settings.LANGUAGES_RTL,
+    }
+    if settings.DEBUG and 'runserver' not in sys.argv:
+        ctx['debug_warning'] = True
+    elif 'runserver' in sys.argv:
+        ctx['development_warning'] = True
+
+    return ctx

src/pretix/base/email.py

@@ -1,15 +1,23 @@
+import inspect
 import logging
+from datetime import timedelta
+from decimal import Decimal
 from smtplib import SMTPResponseException
 
 from django.conf import settings
 from django.core.mail.backends.smtp import EmailBackend
 from django.dispatch import receiver
 from django.template.loader import get_template
+from django.utils.timezone import now
 from django.utils.translation import ugettext_lazy as _
 from inlinestyler.utils import inline_css
 
-from pretix.base.models import Event, Order, OrderPosition
-from pretix.base.signals import register_html_mail_renderers
+from pretix.base.i18n import LazyCurrencyNumber, LazyDate, LazyNumber
+from pretix.base.models import Event
+from pretix.base.settings import PERSON_NAME_SCHEMES
+from pretix.base.signals import (
+    register_html_mail_renderers, register_mail_placeholders,
+)
 from pretix.base.templatetags.rich_text import markdown_compile_email
 
 logger = logging.getLogger('pretix.base.email')
@@ -44,8 +52,8 @@ class BaseHTMLMailRenderer:
     def __str__(self):
         return self.identifier
 
-    def render(self, plain_body: str, plain_signature: str, subject: str, order: Order=None,
-               position: OrderPosition=None) -> str:
+    def render(self, plain_body: str, plain_signature: str, subject: str, order=None,
+               position=None) -> str:
         """
         This method should generate the HTML part of the email.
 
@@ -97,7 +105,7 @@ class TemplateBasedMailRenderer(BaseHTMLMailRenderer):
     def template_name(self):
         raise NotImplementedError()
 
-    def render(self, plain_body: str, plain_signature: str, subject: str, order: Order, position: OrderPosition) -> str:
+    def render(self, plain_body: str, plain_signature: str, subject: str, order, position) -> str:
         body_md = markdown_compile_email(plain_body)
         htmlctx = {
             'site': settings.PRETIX_INSTANCE_NAME,
@@ -136,3 +144,305 @@ class ClassicMailRenderer(TemplateBasedMailRenderer):
 @receiver(register_html_mail_renderers, dispatch_uid="pretixbase_email_renderers")
 def base_renderers(sender, **kwargs):
     return [ClassicMailRenderer]
+
+
+class BaseMailTextPlaceholder:
+    """
+    This is the base class for for all email text placeholders.
+    """
+
+    @property
+    def required_context(self):
+        """
+        This property should return a list of all attribute names that need to be
+        contained in the base context so that this placeholder is available. By default,
+        it returns a list containing the string "event".
+        """
+        return ["event"]
+
+    @property
+    def identifier(self):
+        """
+        This should return the identifier of this placeholder in the email.
+        """
+        raise NotImplementedError()
+
+    def render(self, context):
+        """
+        This method is called to generate the actual text that is being
+        used in the email. You will be passed a context dictionary with the
+        base context attributes specified in ``required_context``. You are
+        expected to return a plain-text string.
+        """
+        raise NotImplementedError()
+
+    def render_sample(self, event):
+        """
+        This method is called to generate a text to be used in email previews.
+        This may only depend on the event.
+        """
+        raise NotImplementedError()
+
+
+class SimpleFunctionalMailTextPlaceholder(BaseMailTextPlaceholder):
+    def __init__(self, identifier, args, func, sample):
+        self._identifier = identifier
+        self._args = args
+        self._func = func
+        self._sample = sample
+
+    @property
+    def identifier(self):
+        return self._identifier
+
+    @property
+    def required_context(self):
+        return self._args
+
+    def render(self, context):
+        return self._func(**{k: context[k] for k in self._args})
+
+    def render_sample(self, event):
+        if callable(self._sample):
+            return self._sample(event)
+        else:
+            return self._sample
+
+
+def get_available_placeholders(event, base_parameters):
+    if 'order' in base_parameters:
+        base_parameters.append('invoice_address')
+    params = {}
+    for r, val in register_mail_placeholders.send(sender=event):
+        if not isinstance(val, (list, tuple)):
+            val = [val]
+        for v in val:
+            if all(rp in base_parameters for rp in v.required_context):
+                params[v.identifier] = v
+    return params
+
+
+def get_email_context(**kwargs):
+    from pretix.base.models import InvoiceAddress
+
+    event = kwargs['event']
+    if 'order' in kwargs:
+        try:
+            kwargs['invoice_address'] = kwargs['order'].invoice_address
+        except InvoiceAddress.DoesNotExist:
+            kwargs['invoice_address'] = InvoiceAddress()
+    ctx = {}
+    for r, val in register_mail_placeholders.send(sender=event):
+        if not isinstance(val, (list, tuple)):
+            val = [val]
+        for v in val:
+            if all(rp in kwargs for rp in v.required_context):
+                ctx[v.identifier] = v.render(kwargs)
+    return ctx
+
+
+def _placeholder_payment(order, payment):
+    if not payment:
+        return None
+    if 'payment' in inspect.signature(payment.payment_provider.order_pending_mail_render).parameters:
+        return str(payment.payment_provider.order_pending_mail_render(order, payment))
+    else:
+        return str(payment.payment_provider.order_pending_mail_render(order))
+
+
+@receiver(register_mail_placeholders, dispatch_uid="pretixbase_register_mail_placeholders")
+def base_placeholders(sender, **kwargs):
+    from pretix.base.models import InvoiceAddress
+    from pretix.multidomain.urlreverse import build_absolute_uri
+
+    ph = [
+        SimpleFunctionalMailTextPlaceholder(
+            'event', ['event'], lambda event: event.name, lambda event: event.name
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'event_slug', ['event'], lambda event: event.slug, lambda event: event.slug
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'code', ['order'], lambda order: order.code, 'F8VVL'
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'total', ['order'], lambda order: LazyNumber(order.total), lambda event: LazyNumber(Decimal('42.23'))
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'currency', ['event'], lambda event: event.currency, lambda event: event.currency
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'total_with_currency', ['event', 'order'], lambda event, order: LazyCurrencyNumber(order.total,
+                                                                                               event.currency),
+            lambda event: LazyCurrencyNumber(Decimal('42.23'), event.currency)
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'expire_date', ['event', 'order'], lambda event, order: LazyDate(order.expires.astimezone(event.timezone)),
+            lambda event: LazyDate(now() + timedelta(days=15))
+            # TODO: This used to be "date" in some placeholders, add a migration!
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'url', ['order', 'event'], lambda order, event: build_absolute_uri(
+                event,
+                'presale:event.order.open', kwargs={
+                    'order': order.code,
+                    'secret': order.secret,
+                    'hash': order.email_confirm_hash()
+                }
+            ), lambda event: build_absolute_uri(
+                event,
+                'presale:event.order.open', kwargs={
+                    'order': 'F8VVL',
+                    'secret': '6zzjnumtsx136ddy',
+                    'hash': '98kusd8ofsj8dnkd'
+                }
+            ),
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'url', ['event', 'position'], lambda event, position: build_absolute_uri(
+                event,
+                'presale:event.order.position',
+                kwargs={
+                    'order': position.order.code,
+                    'secret': position.web_secret,
+                    'position': position.positionid
+                }
+            ),
+            lambda event: build_absolute_uri(
+                event,
+                'presale:event.order.position', kwargs={
+                    'order': 'F8VVL',
+                    'secret': '6zzjnumtsx136ddy',
+                    'position': '123'
+                }
+            ),
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'url', ['waiting_list_entry', 'event'],
+            lambda waiting_list_entry, event: build_absolute_uri(
+                event, 'presale:event.redeem'
+            ) + '?voucher=' + waiting_list_entry.voucher.code,
+            lambda event: build_absolute_uri(
+                event,
+                'presale:event.redeem',
+            ) + '?voucher=68CYU2H6ZTP3WLK5',
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'invoice_name', ['invoice_address'], lambda invoice_address: invoice_address.name or '',
+            _('John Doe')
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'invoice_company', ['invoice_address'], lambda invoice_address: invoice_address.company or '',
+            _('Sample Corporation')
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'orders', ['event', 'orders'], lambda event, orders: '\n' + '\n\n'.join(
+                '* {} - {}'.format(
+                    order.full_code,
+                    build_absolute_uri(event, 'presale:event.order', kwargs={
+                        'event': event.slug,
+                        'organizer': event.organizer.slug,
+                        'order': order.code,
+                        'secret': order.secret
+                    }),
+                )
+                for order in orders
+            ), lambda event: '\n' + '\n\n'.join(
+                '* {} - {}'.format(
+                    '{}-{}'.format(event.slug.upper(), order['code']),
+                    build_absolute_uri(event, 'presale:event.order', kwargs={
+                        'event': event.slug,
+                        'organizer': event.organizer.slug,
+                        'order': order['code'],
+                        'secret': order['secret']
+                    }),
+                )
+                for order in [
+                    {'code': 'F8VVL', 'secret': '6zzjnumtsx136ddy'},
+                    {'code': 'HIDHK', 'secret': '98kusd8ofsj8dnkd'},
+                    {'code': 'OPKSB', 'secret': '09pjdksflosk3njd'}
+                ]
+            ),
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'hours', ['event', 'waiting_list_entry'], lambda event, waiting_list_entry:
+            event.settings.waiting_list_hours,
+            lambda event: event.settings.waiting_list_hours
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'product', ['waiting_list_entry'], lambda waiting_list_entry: waiting_list_entry.item.name,
+            _('Sample Admission Ticket')
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'code', ['waiting_list_entry'], lambda waiting_list_entry: waiting_list_entry.voucher.code,
+            '68CYU2H6ZTP3WLK5'
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'voucher_list', ['voucher_list'], lambda voucher_list: '\n'.join(voucher_list),
+            '    68CYU2H6ZTP3WLK5\n    7MB94KKPVEPSMVF2'
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'url', ['event', 'voucher_list'], lambda event, voucher_list: build_absolute_uri(event, 'presale:event.index', kwargs={
+                'event': event.slug,
+                'organizer': event.organizer.slug,
+            }), lambda event: build_absolute_uri(event, 'presale:event.index', kwargs={
+                'event': event.slug,
+                'organizer': event.organizer.slug,
+            })
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'name', ['name'], lambda name: name,
+            _('John Doe')
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'comment', ['comment'], lambda comment: comment,
+            _('An individual text with a reason can be inserted here.'),
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'payment_info', ['order', 'payment'], _placeholder_payment,
+            _('The amount has been charged to your card.'),
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'payment_info', ['payment_info'], lambda payment_info: payment_info,
+            _('Please transfer money to this bank account: 9999-9999-9999-9999'),
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'attendee_name', ['position'], lambda position: position.attendee_name,
+            _('John Doe'),
+        ),
+        SimpleFunctionalMailTextPlaceholder(
+            'name', ['position_or_address'],
+            lambda position_or_address: (
+                position_or_address.name
+                if isinstance(position_or_address, InvoiceAddress)
+                else position_or_address.attendee_name
+            ),
+            _('John Doe'),
+        ),
+    ]
+
+    name_scheme = PERSON_NAME_SCHEMES[sender.settings.name_scheme]
+    for f, l, w in name_scheme['fields']:
+        if f == 'full_name':
+            continue
+        ph.append(SimpleFunctionalMailTextPlaceholder(
+            'attendee_name_%s' % f, ['position'], lambda position, f=f: position.attendee_name_parts.get(f, ''),
+            name_scheme['sample'][f]
+        ))
+        ph.append(SimpleFunctionalMailTextPlaceholder(
+            'name_%s' % f, ['position_or_address'],
+            lambda position_or_address, f=f: (
+                position_or_address.name_parts.get(f, '')
+                if isinstance(position_or_address, InvoiceAddress)
+                else position_or_address.attendee_name_parts.get(f, '')
+            ),
+            name_scheme['sample'][f]
+        ))
+
+    for k, v in sender.meta_data.items():
+        ph.append(SimpleFunctionalMailTextPlaceholder(
+            'meta_%s' % k, ['event'], lambda event, k=k: event.meta_data[k],
+            v
+        ))
+
+    return ph

src/pretix/base/exporter.py

@@ -111,7 +111,7 @@ class ListExporter(BaseExporter):
         raise NotImplementedError()  # noqa
 
     def get_filename(self):
-        return 'export.csv'
+        return 'export'
 
     def _render_csv(self, form_data, output_file=None, **kwargs):
         if output_file:

src/pretix/base/exporters/dekodi.py

@@ -129,8 +129,11 @@ class DekodiNREIExporter(BaseExporter):
             'DIDt': invoice.order.datetime.isoformat().replace('Z', '+00:00'),
             'DT': '30' if invoice.is_cancellation else '10',
             'EM': invoice.order.email,
-            'FamN': invoice.invoice_to_name.rsplit(' ', 1)[-1],
-            'FN': invoice.invoice_to_name.rsplit(' ', 1)[0] if ' ' in invoice.invoice_to_name else '',
+            'FamN': invoice.invoice_to_name.rsplit(' ', 1)[-1] if invoice.invoice_to_name else '',
+            'FN': (
+                invoice.invoice_to_name.rsplit(' ', 1)[0]
+                if invoice.invoice_to_name and ' ' in invoice.invoice_to_name else ''
+            ),
             'IDt': invoice.date.isoformat() + 'T08:00:00+01:00',
             'INo': invoice.full_invoice_no,
             'IsNet': invoice.reverse_charge,

src/pretix/base/exporters/orderlist.py

@@ -9,7 +9,7 @@ from django.utils.formats import date_format, localize
 from django.utils.translation import pgettext, ugettext as _, ugettext_lazy
 
 from pretix.base.models import (
-    InvoiceAddress, InvoiceLine, Order, OrderPosition,
+    InvoiceAddress, InvoiceLine, Order, OrderPosition, Question,
 )
 from pretix.base.models.orders import OrderFee, OrderPayment, OrderRefund
 from pretix.base.settings import PERSON_NAME_SCHEMES
@@ -96,7 +96,7 @@ class OrderListExporter(MultiSheetListExporter):
             for k, label, w in name_scheme['fields']:
                 headers.append(label)
         headers += [
-            _('Address'), _('ZIP code'), _('City'), _('Country'), _('VAT ID'),
+            _('Address'), _('ZIP code'), _('City'), _('Country'), pgettext('address', 'State'), _('VAT ID'),
             _('Date of last payment'), _('Fees'), _('Order locale')
         ]
 
@@ -109,6 +109,8 @@ class OrderListExporter(MultiSheetListExporter):
 
         headers.append(_('Invoice numbers'))
         headers.append(_('Sales channel'))
+        headers.append(_('Requires special attention'))
+        headers.append(_('Comment'))
 
         yield headers
 
@@ -153,10 +155,11 @@ class OrderListExporter(MultiSheetListExporter):
                     order.invoice_address.city,
                     order.invoice_address.country if order.invoice_address.country else
                     order.invoice_address.country_old,
+                    order.invoice_address.state,
                     order.invoice_address.vat_id,
                 ]
             except InvoiceAddress.DoesNotExist:
-                row += [''] * (7 + (len(name_scheme['fields']) if len(name_scheme['fields']) > 1 else 0))
+                row += [''] * (8 + (len(name_scheme['fields']) if len(name_scheme['fields']) > 1 else 0))
 
             row += [
                 order.payment_date.astimezone(tz).strftime('%Y-%m-%d') if order.payment_date else '',
@@ -178,6 +181,8 @@ class OrderListExporter(MultiSheetListExporter):
 
             row.append(', '.join([i.number for i in order.invoices.all()]))
             row.append(order.sales_channel)
+            row.append(_('Yes') if order.checkin_attention else _('No'))
+            row.append(order.comment or "")
             yield row
 
     def iterate_fees(self, form_data: dict):
@@ -208,7 +213,7 @@ class OrderListExporter(MultiSheetListExporter):
             for k, label, w in name_scheme['fields']:
                 headers.append(_('Invoice address name') + ': ' + str(label))
         headers += [
-            _('Address'), _('ZIP code'), _('City'), _('Country'), _('VAT ID'),
+            _('Address'), _('ZIP code'), _('City'), _('Country'), pgettext('address', 'State'), _('VAT ID'),
         ]
 
         yield headers
@@ -243,10 +248,11 @@ class OrderListExporter(MultiSheetListExporter):
                     order.invoice_address.city,
                     order.invoice_address.country if order.invoice_address.country else
                     order.invoice_address.country_old,
+                    order.invoice_address.state,
                     order.invoice_address.vat_id,
                 ]
             except InvoiceAddress.DoesNotExist:
-                row += [''] * (7 + (len(name_scheme['fields']) if len(name_scheme['fields']) > 1 else 0))
+                row += [''] * (8 + (len(name_scheme['fields']) if len(name_scheme['fields']) > 1 else 0))
             yield row
 
     def iterate_positions(self, form_data: dict):
@@ -301,7 +307,7 @@ class OrderListExporter(MultiSheetListExporter):
             for k, label, w in name_scheme['fields']:
                 headers.append(_('Invoice address name') + ': ' + str(label))
         headers += [
-            _('Address'), _('ZIP code'), _('City'), _('Country'), _('VAT ID'),
+            _('Address'), _('ZIP code'), _('City'), _('Country'), pgettext('address', 'State'), _('VAT ID'),
         ]
         headers.append(_('Sales channel'))
 
@@ -339,7 +345,12 @@ class OrderListExporter(MultiSheetListExporter):
             ]
             acache = {}
             for a in op.answers.all():
-                acache[a.question_id] = str(a)
+                # We do not want to localize Date, Time and Datetime question answers, as those can lead
+                # to difficulties parsing the data (for example 2019-02-01 may become Février, 2019 01 in French).
+                if a.question.type in Question.UNLOCALIZED_TYPES:
+                    acache[a.question_id] = a.answer
+                else:
+                    acache[a.question_id] = str(a)
             for q in questions:
                 row.append(acache.get(q.pk, ''))
             try:
@@ -358,10 +369,11 @@ class OrderListExporter(MultiSheetListExporter):
                     order.invoice_address.city,
                     order.invoice_address.country if order.invoice_address.country else
                     order.invoice_address.country_old,
+                    order.invoice_address.state,
                     order.invoice_address.vat_id,
                 ]
             except InvoiceAddress.DoesNotExist:
-                row += [''] * (7 + (len(name_scheme['fields']) if len(name_scheme['fields']) > 1 else 0))
+                row += [''] * (8 + (len(name_scheme['fields']) if len(name_scheme['fields']) > 1 else 0))
             row.append(order.sales_channel)
             yield row
 
@@ -503,6 +515,7 @@ class InvoiceDataExporter(MultiSheetListExporter):
                 _('Invoice recipient:') + ' ' + _('ZIP code'),
                 _('Invoice recipient:') + ' ' + _('City'),
                 _('Invoice recipient:') + ' ' + _('Country'),
+                _('Invoice recipient:') + ' ' + pgettext('address', 'State'),
                 _('Invoice recipient:') + ' ' + _('VAT ID'),
                 _('Invoice recipient:') + ' ' + _('Beneficiary'),
                 _('Invoice recipient:') + ' ' + _('Internal reference'),
@@ -552,6 +565,7 @@ class InvoiceDataExporter(MultiSheetListExporter):
                     i.invoice_to_zipcode,
                     i.invoice_to_city,
                     i.invoice_to_country,
+                    i.invoice_to_state,
                     i.invoice_to_vat_id,
                     i.invoice_to_beneficiary,
                     i.internal_reference,
@@ -591,6 +605,7 @@ class InvoiceDataExporter(MultiSheetListExporter):
                 _('Invoice recipient:') + ' ' + _('ZIP code'),
                 _('Invoice recipient:') + ' ' + _('City'),
                 _('Invoice recipient:') + ' ' + _('Country'),
+                _('Invoice recipient:') + ' ' + pgettext('address', 'State'),
                 _('Invoice recipient:') + ' ' + _('VAT ID'),
                 _('Invoice recipient:') + ' ' + _('Beneficiary'),
                 _('Invoice recipient:') + ' ' + _('Internal reference'),
@@ -630,6 +645,7 @@ class InvoiceDataExporter(MultiSheetListExporter):
                     i.invoice_to_zipcode,
                     i.invoice_to_city,
                     i.invoice_to_country,
+                    i.invoice_to_state,
                     i.invoice_to_vat_id,
                     i.invoice_to_beneficiary,
                     i.internal_reference,

src/pretix/base/forms/auth.py

@@ -1,6 +1,5 @@
 from django import forms
 from django.conf import settings
-from django.contrib.auth import authenticate
 from django.contrib.auth.password_validation import (
     password_validators_help_texts, validate_password,
 )
@@ -14,32 +13,33 @@ class LoginForm(forms.Form):
     Base class for authenticating users. Extend this to get a form that accepts
     username/password logins.
     """
-    email = forms.EmailField(label=_("E-mail"), max_length=254, widget=forms.EmailInput(attrs={'autofocus': 'autofocus'}))
-    password = forms.CharField(label=_("Password"), widget=forms.PasswordInput)
     keep_logged_in = forms.BooleanField(label=_("Keep me logged in"), required=False)
 
     error_messages = {
-        'invalid_login': _("Please enter a correct email address and password."),
+        'invalid_login': _("This combination of credentials is not known to our system."),
         'inactive': _("This account is inactive.")
     }
 
-    def __init__(self, request=None, *args, **kwargs):
+    def __init__(self, backend, request=None, *args, **kwargs):
         """
         The 'request' parameter is set for custom auth use by subclasses.
         The form data comes in via the standard 'data' kwarg.
         """
         self.request = request
         self.user_cache = None
+        self.backend = backend
         super().__init__(*args, **kwargs)
+        for k, f in backend.login_form_fields.items():
+            self.fields[k] = f
+
         if not settings.PRETIX_LONG_SESSIONS:
             del self.fields['keep_logged_in']
+        else:
+            self.fields.move_to_end('keep_logged_in')
 
     def clean(self):
-        email = self.cleaned_data.get('email')
-        password = self.cleaned_data.get('password')
-
-        if email and password:
-            self.user_cache = authenticate(request=self.request, email=email.lower(), password=password)
+        if all(k in self.cleaned_data for k, f in self.fields.items() if f.required):
+            self.user_cache = self.backend.form_authenticate(self.request, self.cleaned_data)
             if self.user_cache is None:
                 raise forms.ValidationError(
                     self.error_messages['invalid_login'],
@@ -181,3 +181,44 @@ class PasswordForgotForm(forms.Form):
 
     def clean_email(self):
         return self.cleaned_data['email']
+
+
+class ReauthForm(forms.Form):
+    error_messages = {
+        'invalid_login': _("This combination of credentials is not known to our system."),
+        'inactive': _("This account is inactive.")
+    }
+
+    def __init__(self, backend, user, request=None, *args, **kwargs):
+        """
+        The 'request' parameter is set for custom auth use by subclasses.
+        The form data comes in via the standard 'data' kwarg.
+        """
+        self.request = request
+        self.user = user
+        self.backend = backend
+        super().__init__(*args, **kwargs)
+        for k, f in backend.login_form_fields.items():
+            self.fields[k] = f
+        if 'email' in self.fields:
+            self.fields['email'].disabled = True
+
+    def clean(self):
+        self.cleaned_data['email'] = self.user.email
+        user_cache = self.backend.form_authenticate(self.request, self.cleaned_data)
+        if user_cache != self.user:
+            raise forms.ValidationError(
+                self.error_messages['invalid_login'],
+                code='invalid_login'
+            )
+        else:
+            self.confirm_login_allowed(user_cache)
+
+        return self.cleaned_data
+
+    def confirm_login_allowed(self, user: User):
+        if not user.is_active:
+            raise forms.ValidationError(
+                self.error_messages['inactive'],
+                code='inactive',
+            )

src/pretix/base/forms/questions.py

@@ -5,6 +5,7 @@ from decimal import Decimal
 from urllib.error import HTTPError
 
 import dateutil.parser
+import pycountry
 import pytz
 import vat_moss.errors
 import vat_moss.id
@@ -15,7 +16,9 @@ from django.db.models import QuerySet
 from django.forms import Select
 from django.utils.html import escape
 from django.utils.safestring import mark_safe
-from django.utils.translation import get_language, ugettext_lazy as _
+from django.utils.translation import (
+    get_language, pgettext_lazy, ugettext_lazy as _,
+)
 from django_countries import countries
 from django_countries.fields import Country, CountryField
 
@@ -24,8 +27,11 @@ from pretix.base.forms.widgets import (
     TimePickerWidget, UploadedFileWidget,
 )
 from pretix.base.models import InvoiceAddress, Question, QuestionOption
-from pretix.base.models.tax import EU_COUNTRIES
-from pretix.base.settings import PERSON_NAME_SCHEMES, PERSON_NAME_TITLE_GROUPS
+from pretix.base.models.tax import EU_COUNTRIES, cc_to_vat_prefix
+from pretix.base.settings import (
+    COUNTRIES_WITH_STATE_IN_ADDRESS, PERSON_NAME_SCHEMES,
+    PERSON_NAME_TITLE_GROUPS,
+)
 from pretix.base.templatetags.rich_text import rich_text
 from pretix.control.forms import SplitDateTimeField
 from pretix.helpers.escapejson import escapejson_attr
@@ -37,6 +43,14 @@ logger = logging.getLogger(__name__)
 
 class NamePartsWidget(forms.MultiWidget):
     widget = forms.TextInput
+    autofill_map = {
+        'given_name': 'given-name',
+        'family_name': 'family-name',
+        'middle_name': 'additional-name',
+        'title': 'honorific-prefix',
+        'full_name': 'name',
+        'calling_name': 'nickname',
+    }
 
     def __init__(self, scheme: dict, field: forms.Field, attrs=None, titles: list=None):
         widgets = []
@@ -83,6 +97,7 @@ class NamePartsWidget(forms.MultiWidget):
                     title=self.scheme['fields'][i][1],
                     placeholder=self.scheme['fields'][i][1],
                 )
+                final_attrs['autocomplete'] = (self.attrs.get('autocomplete', '') + ' ' + self.autofill_map.get(self.scheme['fields'][i][0], 'off')).strip()
                 final_attrs['data-size'] = self.scheme['fields'][i][2]
             output.append(widget.render(name + '_%s' % i, widget_value, final_attrs, renderer=renderer))
         return mark_safe(self.format_output(output))
@@ -188,7 +203,12 @@ class BaseQuestionsForm(forms.Form):
             self.fields['attendee_email'] = forms.EmailField(
                 required=event.settings.attendee_emails_required,
                 label=_('Attendee email'),
-                initial=(cartpos.attendee_email if cartpos else orderpos.attendee_email)
+                initial=(cartpos.attendee_email if cartpos else orderpos.attendee_email),
+                widget=forms.EmailInput(
+                    attrs={
+                        'autocomplete': 'email'
+                    }
+                )
             )
 
         for q in questions:
@@ -318,12 +338,18 @@ class BaseQuestionsForm(forms.Form):
                 self.fields[key] = value
                 value.initial = data.get('question_form_data', {}).get(key)
 
+        for k, v in self.fields.items():
+            if v.widget.attrs.get('autocomplete') or k == 'attendee_name_parts':
+                v.widget.attrs['autocomplete'] = 'section-{} '.format(self.prefix) + v.widget.attrs.get('autocomplete', '')
+
     def clean(self):
         d = super().clean()
 
         question_cache = {f.question.pk: f.question for f in self.fields.values() if getattr(f, 'question', None)}
 
         def question_is_visible(parentid, qvals):
+            if parentid not in question_cache:
+                return False
             parentq = question_cache[parentid]
             if parentq.dependency_question_id and not question_is_visible(parentq.dependency_question_id, parentq.dependency_values):
                 return False
@@ -356,13 +382,29 @@ class BaseInvoiceAddressForm(forms.ModelForm):
 
     class Meta:
         model = InvoiceAddress
-        fields = ('is_business', 'company', 'name_parts', 'street', 'zipcode', 'city', 'country', 'vat_id',
-                  'internal_reference', 'beneficiary')
+        fields = ('is_business', 'company', 'name_parts', 'street', 'zipcode', 'city', 'country', 'state',
+                  'vat_id', 'internal_reference', 'beneficiary')
         widgets = {
             'is_business': BusinessBooleanRadio,
-            'street': forms.Textarea(attrs={'rows': 2, 'placeholder': _('Street and Number')}),
+            'street': forms.Textarea(attrs={
+                'rows': 2,
+                'placeholder': _('Street and Number'),
+                'autocomplete': 'street-address'
+            }),
             'beneficiary': forms.Textarea(attrs={'rows': 3}),
-            'company': forms.TextInput(attrs={'data-display-dependency': '#id_is_business_1'}),
+            'country': forms.Select(attrs={
+                'autocomplete': 'country',
+            }),
+            'zipcode': forms.TextInput(attrs={
+                'autocomplete': 'postal-code',
+            }),
+            'city': forms.TextInput(attrs={
+                'autocomplete': 'address-level2',
+            }),
+            'company': forms.TextInput(attrs={
+                'data-display-dependency': '#id_is_business_1',
+                'autocomplete': 'organization',
+            }),
             'vat_id': forms.TextInput(attrs={'data-display-dependency': '#id_is_business_1'}),
             'internal_reference': forms.TextInput,
         }
@@ -400,6 +442,33 @@ class BaseInvoiceAddressForm(forms.ModelForm):
         if not event.settings.invoice_address_vatid:
             del self.fields['vat_id']
 
+        c = [('', pgettext_lazy('address', 'Select state'))]
+        fprefix = self.prefix + '-' if self.prefix else ''
+        cc = None
+        if fprefix + 'country' in self.data:
+            cc = str(self.data[fprefix + 'country'])
+        elif 'country' in self.initial:
+            cc = str(self.initial['country'])
+        elif self.instance and self.instance.country:
+            cc = str(self.instance.country)
+        if cc and cc in COUNTRIES_WITH_STATE_IN_ADDRESS:
+            types, form = COUNTRIES_WITH_STATE_IN_ADDRESS[cc]
+            statelist = [s for s in pycountry.subdivisions.get(country_code=cc) if s.type in types]
+            c += sorted([(s.code[3:], s.name) for s in statelist], key=lambda s: s[1])
+        elif fprefix + 'state' in self.data:
+            self.data = self.data.copy()
+            del self.data[fprefix + 'state']
+
+        self.fields['state'] = forms.ChoiceField(
+            label=pgettext_lazy('address', 'State'),
+            required=False,
+            choices=c,
+            widget=forms.Select(attrs={
+                'autocomplete': 'address-level1',
+            }),
+        )
+        self.fields['state'].widget.is_required = True
+
         if not event.settings.invoice_address_required or self.all_optional:
             for k, f in self.fields.items():
                 f.required = False
@@ -426,13 +495,18 @@ class BaseInvoiceAddressForm(forms.ModelForm):
             initial=(self.instance.name_parts if self.instance else self.instance.name_parts),
         )
         if event.settings.invoice_address_required and not event.settings.invoice_address_company_required and not self.all_optional:
-            self.fields['name_parts'].widget.attrs['data-required-if'] = '#id_is_business_0'
+            if not event.settings.invoice_name_required:
+                self.fields['name_parts'].widget.attrs['data-required-if'] = '#id_is_business_0'
             self.fields['name_parts'].widget.attrs['data-no-required-attr'] = '1'
             self.fields['company'].widget.attrs['data-required-if'] = '#id_is_business_1'
 
         if not event.settings.invoice_address_beneficiary:
             del self.fields['beneficiary']
 
+        for k, v in self.fields.items():
+            if v.widget.attrs.get('autocomplete') or k == 'name_parts':
+                v.widget.attrs['autocomplete'] = 'section-invoice billing ' + v.widget.attrs.get('autocomplete', '')
+
     def clean(self):
         data = self.cleaned_data
         if not data.get('is_business'):
@@ -446,6 +520,10 @@ class BaseInvoiceAddressForm(forms.ModelForm):
         if 'vat_id' in self.changed_data or not data.get('vat_id'):
             self.instance.vat_id_validated = False
 
+        if data.get('city') and data.get('country') and str(data['country']) in COUNTRIES_WITH_STATE_IN_ADDRESS:
+            if not data.get('state'):
+                self.add_error('state', _('This field is required.'))
+
         self.instance.name_parts = data.get('name_parts')
 
         if all(
@@ -457,7 +535,7 @@ class BaseInvoiceAddressForm(forms.ModelForm):
         if self.validate_vat_id and self.instance.vat_id_validated and 'vat_id' not in self.changed_data:
             pass
         elif self.validate_vat_id and data.get('is_business') and data.get('country') in EU_COUNTRIES and data.get('vat_id'):
-            if data.get('vat_id')[:2] != str(data.get('country')):
+            if data.get('vat_id')[:2] != cc_to_vat_prefix(str(data.get('country'))):
                 raise ValidationError(_('Your VAT ID does not match the selected country.'))
             try:
                 result = vat_moss.id.validate(data.get('vat_id'))
@@ -488,9 +566,8 @@ class BaseInvoiceAddressForm(forms.ModelForm):
 
 
 class BaseInvoiceNameForm(BaseInvoiceAddressForm):
-
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         for f in list(self.fields.keys()):
-            if f != 'name':
+            if f != 'name_parts':
                 del self.fields[f]

src/pretix/base/forms/user.py

@@ -56,6 +56,11 @@ class UserSettingsForm(forms.ModelForm):
         self.user = kwargs.pop('user')
         super().__init__(*args, **kwargs)
         self.fields['email'].required = True
+        if self.user.auth_backend != 'native':
+            del self.fields['old_pw']
+            del self.fields['new_pw']
+            del self.fields['new_pw_repeat']
+            self.fields['email'].disabled = True
 
     def clean_old_pw(self):
         old_pw = self.cleaned_data.get('old_pw')
@@ -115,5 +120,5 @@ class User2FADeviceAddForm(forms.Form):
     name = forms.CharField(label=_('Device name'), max_length=64)
     devicetype = forms.ChoiceField(label=_('Device type'), widget=forms.RadioSelect, choices=(
         ('totp', _('Smartphone with the Authenticator application')),
-        ('u2f', _('U2F-compatible hardware token (e.g. Yubikey)')),
+        ('webauthn', _('WebAuthn-compatible hardware token (e.g. Yubikey)')),
     ))

src/pretix/base/forms/validators.py

@@ -26,7 +26,7 @@ class PlaceholderValidator(BaseValidator):
         if value.count('{') != value.count('}'):
             raise ValidationError(
                 _('Invalid placeholder syntax: You used a different number of "{" than of "}".'),
-                code='invalid',
+                code='invalid_placeholder_syntax',
             )
 
         data_placeholders = list(re.findall(r'({[^}]*})', value, re.X))
@@ -37,7 +37,7 @@ class PlaceholderValidator(BaseValidator):
         if invalid_placeholders:
             raise ValidationError(
                 _('Invalid placeholder(s): %(value)s'),
-                code='invalid',
+                code='invalid_placeholders',
                 params={'value': ", ".join(invalid_placeholders,)})
 
     def clean(self, x):

src/pretix/base/forms/widgets.py

@@ -46,6 +46,14 @@ class TimePickerWidget(forms.TimeInput):
 
 class UploadedFileWidget(forms.ClearableFileInput):
     def __init__(self, *args, **kwargs):
+        # Browsers can't recognize that the server already has a file uploaded
+        # Don't mark this input as being required if we already have an answer
+        # (this needs to be done via the attrs, otherwise we wouldn't get the "required" star on the field label)
+        attrs = kwargs.get('attrs', {})
+        if kwargs.get('required') and kwargs.get('initial'):
+            attrs.update({'required': None})
+        kwargs.update({'attrs': attrs})
+
         self.position = kwargs.pop('position')
         self.event = kwargs.pop('event')
         self.answer = kwargs.pop('answer')

src/pretix/base/management/commands/makemigrations.py

@@ -23,7 +23,7 @@ modelops.AlterModelOptions.ALTER_OPTION_KEYS.remove("default_manager_name")
 modelops.AlterModelOptions.ALTER_OPTION_KEYS.remove("permissions")
 modelops.AlterModelOptions.ALTER_OPTION_KEYS.remove("default_permissions")
 IGNORED_ATTRS = [
-    # (field type, attribute name, blacklist of field sub-types)
+    # (field type, attribute name, banlist of field sub-types)
     (models.Field, 'verbose_name', []),
     (models.Field, 'help_text', []),
     (models.Field, 'validators', []),
@@ -38,8 +38,8 @@ original_deconstruct = models.Field.deconstruct
 
 def new_deconstruct(self):
     name, path, args, kwargs = original_deconstruct(self)
-    for ftype, attr, blacklist in IGNORED_ATTRS:
-        if isinstance(self, ftype) and not any(isinstance(self, ft) for ft in blacklist):
+    for ftype, attr, banlist in IGNORED_ATTRS:
+        if isinstance(self, ftype) and not any(isinstance(self, ft) for ft in banlist):
             kwargs.pop(attr, None)
     return name, path, args, kwargs
 

src/pretix/base/management/commands/migrate.py

@@ -11,13 +11,13 @@ from django.core.management.commands.migrate import Command as Parent
 
 
 class OutputFilter(OutputWrapper):
-    blacklist = (
+    banlist = (
         "Your models have changes that are not yet reflected",
         "Run 'manage.py makemigrations' to make new "
     )
 
     def write(self, msg, style_func=None, ending=None):
-        if any(b in msg for b in self.blacklist):
+        if any(b in msg for b in self.banlist):
             return
         super().write(msg, style_func, ending)
 

src/pretix/base/middleware.py

@@ -14,6 +14,7 @@ from django.utils.translation.trans_real import (
     parse_accept_lang_header,
 )
 
+from pretix.base.settings import GlobalSettingsObject
 from pretix.multidomain.urlreverse import get_domain
 
 _supported = None
@@ -187,6 +188,11 @@ class SecurityMiddleware(MiddlewareMixin):
         # https://github.com/pretix/pretix/issues/765
         resp['P3P'] = 'CP=\"ALL DSP COR CUR ADM TAI OUR IND COM NAV INT\"'
 
+        img_src = []
+        gs = GlobalSettingsObject()
+        if gs.settings.leaflet_tiles:
+            img_src.append(gs.settings.leaflet_tiles[:gs.settings.leaflet_tiles.index("/", 10)].replace("{s}", "*"))
+
         h = {
             'default-src': ["{static}"],
             'script-src': ['{static}', 'https://checkout.stripe.com', 'https://js.stripe.com'],
@@ -196,7 +202,7 @@ class SecurityMiddleware(MiddlewareMixin):
             'child-src': ['{static}', 'https://checkout.stripe.com', 'https://js.stripe.com'],
             'style-src': ["{static}", "{media}"],
             'connect-src': ["{dynamic}", "{media}", "https://checkout.stripe.com"],
-            'img-src': ["{static}", "{media}", "data:", "https://*.stripe.com"],
+            'img-src': ["{static}", "{media}", "data:", "https://*.stripe.com"] + img_src,
             'font-src': ["{static}"],
             'media-src': ["{static}", "data:"],
             # form-action is not only used to match on form actions, but also on URLs

src/pretix/base/migrations/0031_auto_20160816_0648_squashed_0048_auto_20161129_1330.py

@@ -182,12 +182,12 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='event',
             name='slug',
-            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This is being used in addresses and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.EventSlugBlacklistValidator()], verbose_name='Slug'),
+            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This is being used in addresses and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.EventSlugBanlistValidator()], verbose_name='Slug'),
         ),
         migrations.AlterField(
             model_name='organizer',
             name='slug',
-            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This is being used in addresses and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.OrganizerSlugBlacklistValidator()], verbose_name='Slug'),
+            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This is being used in addresses and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.OrganizerSlugBanlistValidator()], verbose_name='Slug'),
         ),
         migrations.AlterField(
             model_name='voucher',

src/pretix/base/migrations/0047_auto_20161126_1300.py

@@ -23,12 +23,12 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='event',
             name='slug',
-            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This is being used in addresses and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.EventSlugBlacklistValidator()], verbose_name='Slug'),
+            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This is being used in addresses and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.EventSlugBanlistValidator()], verbose_name='Slug'),
         ),
         migrations.AlterField(
             model_name='organizer',
             name='slug',
-            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This is being used in addresses and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.OrganizerSlugBlacklistValidator()], verbose_name='Slug'),
+            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This is being used in addresses and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.OrganizerSlugBanlistValidator()], verbose_name='Slug'),
         ),
         migrations.AlterField(
             model_name='voucher',

src/pretix/base/migrations/0050_orderposition_positionid_squashed_0061_event_location.py

@@ -124,7 +124,7 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='event',
             name='slug',
-            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This will be used in order codes, invoice numbers, links and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.EventSlugBlacklistValidator()], verbose_name='Short form'),
+            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This will be used in order codes, invoice numbers, links and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.EventSlugBanlistValidator()], verbose_name='Short form'),
         ),
         migrations.AddField(
             model_name='requiredaction',
@@ -179,7 +179,7 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='organizer',
             name='slug',
-            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This is being used in addresses and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.OrganizerSlugBlacklistValidator()], verbose_name='Short form'),
+            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This is being used in addresses and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.OrganizerSlugBanlistValidator()], verbose_name='Short form'),
         ),
         migrations.RunPython(
             code=merge_names,

src/pretix/base/migrations/0052_team_teaminvite_squashed_0070_auto_20170719_0910.py

@@ -346,7 +346,7 @@ class Migration(migrations.Migration):
                 help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. We recommend some kind of abbreviation or a date with less than 10 characters that can be easily remembered, but you can also choose to use a random value. This will be used in URLs, order codes, invoice numbers, and bank transfer references.',
                 validators=[django.core.validators.RegexValidator(
                     message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'),
-                    pretix.base.validators.EventSlugBlacklistValidator()], verbose_name='Short form'),
+                    pretix.base.validators.EventSlugBanlistValidator()], verbose_name='Short form'),
         ),
         migrations.AlterField(
             model_name='invoice',

src/pretix/base/migrations/0053_auto_20170104_1252.py

@@ -33,7 +33,7 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='event',
             name='slug',
-            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This will be used in order codes, invoice numbers, links and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.EventSlugBlacklistValidator()], verbose_name='Short form'),
+            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This will be used in order codes, invoice numbers, links and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.EventSlugBanlistValidator()], verbose_name='Short form'),
         ),
         migrations.AddField(
             model_name='requiredaction',

src/pretix/base/migrations/0057_auto_20170107_1531.py

@@ -36,7 +36,7 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='organizer',
             name='slug',
-            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This is being used in addresses and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.OrganizerSlugBlacklistValidator()], verbose_name='Short form'),
+            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. This is being used in addresses and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.OrganizerSlugBanlistValidator()], verbose_name='Short form'),
         ),
         migrations.RunPython(merge_names, migrations.RunPython.noop)
     ]

src/pretix/base/migrations/0063_auto_20170702_1711.py

@@ -38,7 +38,7 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='event',
             name='slug',
-            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. We recommend some kind of abbreviation or a date with less than 10 characters that can be easily remembered, but you can also choose to use a random value. This will be used in URLs, order codes, invoice numbers, and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.EventSlugBlacklistValidator()], verbose_name='Short form'),
+            field=models.SlugField(help_text='Should be short, only contain lowercase letters and numbers, and must be unique among your events. We recommend some kind of abbreviation or a date with less than 10 characters that can be easily remembered, but you can also choose to use a random value. This will be used in URLs, order codes, invoice numbers, and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.EventSlugBanlistValidator()], verbose_name='Short form'),
         ),
         migrations.AlterField(
             model_name='invoice',

src/pretix/base/migrations/0077_auto_20171124_1629.py

@@ -44,7 +44,7 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='event',
             name='slug',
-            field=models.SlugField(help_text='Should be short, only contain lowercase letters, numbers, dots, and dashes, and must be unique among your events. We recommend some kind of abbreviation or a date with less than 10 characters that can be easily remembered, but you can also choose to use a random value. This will be used in URLs, order codes, invoice numbers, and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.EventSlugBlacklistValidator()], verbose_name='Short form'),
+            field=models.SlugField(help_text='Should be short, only contain lowercase letters, numbers, dots, and dashes, and must be unique among your events. We recommend some kind of abbreviation or a date with less than 10 characters that can be easily remembered, but you can also choose to use a random value. This will be used in URLs, order codes, invoice numbers, and bank transfer references.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.EventSlugBanlistValidator()], verbose_name='Short form'),
         ),
         migrations.AlterField(
             model_name='eventmetaproperty',
@@ -54,7 +54,7 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='organizer',
             name='slug',
-            field=models.SlugField(help_text='Should be short, only contain lowercase letters, numbers, dots, and dashes. Every slug can only be used once. This is being used in URLs to refer to your organizer accounts and your events.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.OrganizerSlugBlacklistValidator()], verbose_name='Short form'),
+            field=models.SlugField(help_text='Should be short, only contain lowercase letters, numbers, dots, and dashes. Every slug can only be used once. This is being used in URLs to refer to your organizer accounts and your events.', validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.OrganizerSlugBanlistValidator()], verbose_name='Short form'),
         ),
         migrations.CreateModel(
             name='CheckinList',

src/pretix/base/migrations/0077_auto_20171124_1629_squashed_0088_auto_20180328_1217.py

@@ -105,7 +105,7 @@ class Migration(migrations.Migration):
                           'references.',
                 validators=[django.core.validators.RegexValidator(
                     message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'),
-                    pretix.base.validators.EventSlugBlacklistValidator()], verbose_name='Short form'),
+                    pretix.base.validators.EventSlugBanlistValidator()], verbose_name='Short form'),
         ),
         migrations.AlterField(
             model_name='eventmetaproperty',
@@ -125,7 +125,7 @@ class Migration(migrations.Migration):
                           ' events.',
                 validators=[django.core.validators.RegexValidator(
                     message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'),
-                    pretix.base.validators.OrganizerSlugBlacklistValidator()], verbose_name='Short form'),
+                    pretix.base.validators.OrganizerSlugBanlistValidator()], verbose_name='Short form'),
         ),
         migrations.CreateModel(
             name='CheckinList',

src/pretix/base/migrations/0098_auto_20180731_1243.py

@@ -27,7 +27,7 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='organizer',
             name='slug',
-            field=models.SlugField(help_text='Should be short, only contain lowercase letters, numbers, dots, and dashes. Every slug can only be used once. This is being used in URLs to refer to your organizer accounts and your events.', unique=True, validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.OrganizerSlugBlacklistValidator()], verbose_name='Short form'),
+            field=models.SlugField(help_text='Should be short, only contain lowercase letters, numbers, dots, and dashes. Every slug can only be used once. This is being used in URLs to refer to your organizer accounts and your events.', unique=True, validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.OrganizerSlugBanlistValidator()], verbose_name='Short form'),
         ),
         migrations.AlterField(
             model_name='staffsession',

src/pretix/base/migrations/0098_auto_20180731_1243_squashed_0100_item_require_approval.py

@@ -29,7 +29,7 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='organizer',
             name='slug',
-            field=models.SlugField(help_text='Should be short, only contain lowercase letters, numbers, dots, and dashes. Every slug can only be used once. This is being used in URLs to refer to your organizer accounts and your events.', unique=True, validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.OrganizerSlugBlacklistValidator()], verbose_name='Short form'),
+            field=models.SlugField(help_text='Should be short, only contain lowercase letters, numbers, dots, and dashes. Every slug can only be used once. This is being used in URLs to refer to your organizer accounts and your events.', unique=True, validators=[django.core.validators.RegexValidator(message='The slug may only contain letters, numbers, dots and dashes.', regex='^[a-zA-Z0-9.-]+$'), pretix.base.validators.OrganizerSlugBanlistValidator()], verbose_name='Short form'),
         ),
         migrations.AlterField(
             model_name='staffsession',

src/pretix/base/migrations/0132_auto_20190808_1253.py

@@ -0,0 +1,27 @@
+# Generated by Django 2.2.1 on 2019-08-08 12:53
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import pretix.base.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0131_auto_20190729_1422'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='invoice',
+            name='invoice_to_state',
+            field=models.CharField(max_length=190, null=True),
+        ),
+        migrations.AddField(
+            model_name='invoiceaddress',
+            name='state',
+            field=models.CharField(default='', max_length=255),
+            preserve_default=False,
+        ),
+    ]

src/pretix/base/migrations/0133_auto_20190830_1513.py

@@ -0,0 +1,21 @@
+# Generated by Django 2.2.4 on 2019-08-30 15:13
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import pretix.base.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0132_auto_20190808_1253'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='question',
+            name='print_on_invoice',
+            field=models.BooleanField(default=False),
+        ),
+    ]

src/pretix/base/migrations/0134_auto_20190909_1042.py

@@ -0,0 +1,35 @@
+# Generated by Django 2.2.4 on 2019-09-09 10:42
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+import pretix.base.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0133_auto_20190830_1513'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='WebAuthnDevice',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('name', models.CharField(max_length=64)),
+                ('confirmed', models.BooleanField(default=True)),
+                ('credential_id', models.CharField(max_length=255, null=True)),
+                ('rp_id', models.CharField(max_length=255, null=True)),
+                ('icon_url', models.CharField(max_length=255, null=True)),
+                ('ukey', models.TextField(null=True)),
+                ('pub_key', models.TextField(null=True)),
+                ('sign_count', models.IntegerField(default=0)),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+    ]

src/pretix/base/migrations/0135_auto_20191007_0803.py

@@ -0,0 +1,27 @@
+# Generated by Django 2.2.4 on 2019-10-07 08:03
+from django.core.cache import cache
+from django.db import migrations
+
+
+def mail_migrator(app, schema_editor):
+    Event_SettingsStore = app.get_model('pretixbase', 'Event_SettingsStore')
+
+    for ss in Event_SettingsStore.objects.filter(
+        key__in=['mail_text_order_approved', 'mail_text_order_placed', 'mail_text_order_placed_require_approval']
+    ):
+        chgd = ss.value.replace("{date}", "{expire_date}")
+        if chgd != ss.value:
+            ss.value = chgd
+            ss.save()
+            cache.delete('hierarkey_{}_{}'.format('event', ss.object_id))
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0134_auto_20190909_1042'),
+    ]
+
+    operations = [
+        migrations.RunPython(mail_migrator, migrations.RunPython.noop)
+    ]

src/pretix/base/migrations/0136_auto_20190918_1742.py

@@ -0,0 +1,25 @@
+# Generated by Django 2.2 on 2019-09-18 17:42
+
+from django.db import migrations, models
+
+import pretix.base.models.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0135_auto_20191007_0803'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='checkin',
+            name='auto_checked_in',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name='checkinlist',
+            name='auto_checkin_sales_channels',
+            field=pretix.base.models.fields.MultiStringField(default=[]),
+        )
+    ]

src/pretix/base/migrations/0137_auto_20191015_1141.py

@@ -0,0 +1,17 @@
+# Generated by Django 2.2.4 on 2019-10-15 11:41
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('pretixbase', '0136_auto_20190918_1742'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='user',
+            name='auth_backend',
+            field=models.CharField(default='native', max_length=255),
+        ),
+    ]

src/pretix/base/migrations/0138_auto_20191017_1151.py

@@ -0,0 +1,107 @@
+# Generated by Django 2.2.4 on 2019-10-17 11:51
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import pretix.base.models.base
+import pretix.base.models.fields
+import pretix.base.models.giftcards
+
+
+def fwd(app, schema_editor):
+    Team = app.get_model('pretixbase', 'Team')
+    Team.objects.filter(can_change_organizer_settings=True).update(can_manage_gift_cards=True)
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('pretixbase', '0137_auto_20191015_1141'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='GiftCard',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('issuance', models.DateTimeField(auto_now_add=True)),
+                ('secret', models.CharField(db_index=True, default=pretix.base.models.giftcards.gen_giftcard_secret,
+                                            max_length=190)),
+                ('currency', models.CharField(max_length=10)),
+                ('issued_in', models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT,
+                                                related_name='issued_gift_cards', to='pretixbase.OrderPosition')),
+                ('issuer',
+                 models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='issued_gift_cards',
+                                   to='pretixbase.Organizer')),
+                ('testmode', django.db.models.BooleanField(default=False)),
+            ],
+            options={
+                'unique_together': {('secret', 'issuer')},
+            },
+            bases=(models.Model, pretix.base.models.base.LoggingMixin),
+        ),
+        migrations.AddField(
+            model_name='item',
+            name='issue_giftcard',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name='team',
+            name='can_manage_gift_cards',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AlterField(
+            model_name='question',
+            name='dependency_values',
+            field=pretix.base.models.fields.MultiStringField(default=[]),
+        ),
+        migrations.AlterField(
+            model_name='voucher',
+            name='item',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='vouchers',
+                                    to='pretixbase.Item'),
+        ),
+        migrations.AlterField(
+            model_name='voucher',
+            name='quota',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='vouchers',
+                                    to='pretixbase.Quota'),
+        ),
+        migrations.AlterField(
+            model_name='voucher',
+            name='variation',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='vouchers',
+                                    to='pretixbase.ItemVariation'),
+        ),
+        migrations.CreateModel(
+            name='GiftCardTransaction',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('datetime', models.DateTimeField(auto_now_add=True)),
+                ('value', models.DecimalField(decimal_places=2, max_digits=10)),
+                ('card', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='transactions',
+                                           to='pretixbase.GiftCard')),
+                ('order', models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT,
+                                            related_name='gift_card_transactions', to='pretixbase.Order')),
+                ('payment', models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT,
+                                              related_name='gift_card_transactions', to='pretixbase.OrderPayment')),
+                ('refund', models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT,
+                                             related_name='gift_card_transactions', to='pretixbase.OrderRefund')),
+            ],
+            options={
+                'ordering': ('datetime',),
+            },
+        ),
+        migrations.CreateModel(
+            name='GiftCardAcceptance',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('collector', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE,
+                                                related_name='gift_card_issuer_acceptance', to='pretixbase.Organizer')),
+                ('issuer', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE,
+                                             related_name='gift_card_collector_acceptance', to='pretixbase.Organizer')),
+            ],
+        ),
+        migrations.RunPython(
+            fwd, migrations.RunPython.noop
+        ),
+    ]

src/pretix/base/migrations/0139_auto_20191019_1317.py

@@ -0,0 +1,33 @@
+# Generated by Django 2.2.1 on 2019-10-19 13:17
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0138_auto_20191017_1151'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='event',
+            name='geo_lat',
+            field=models.FloatField(null=True),
+        ),
+        migrations.AddField(
+            model_name='event',
+            name='geo_lon',
+            field=models.FloatField(null=True),
+        ),
+        migrations.AddField(
+            model_name='subevent',
+            name='geo_lat',
+            field=models.FloatField(null=True),
+        ),
+        migrations.AddField(
+            model_name='subevent',
+            name='geo_lon',
+            field=models.FloatField(null=True),
+        ),
+    ]

src/pretix/base/models/__init__.py

@@ -1,5 +1,5 @@
 from ..settings import GlobalSettingsObject_SettingsStore
-from .auth import U2FDevice, User
+from .auth import U2FDevice, User, WebAuthnDevice
 from .base import CachedFile, LoggedModel, cachedfile_name
 from .checkin import Checkin, CheckinList
 from .devices import Device
@@ -7,6 +7,7 @@ from .event import (
     Event, Event_SettingsStore, EventLock, EventMetaProperty, EventMetaValue,
     RequiredAction, SubEvent, SubEventMetaValue, generate_invite_token,
 )
+from .giftcards import GiftCard, GiftCardAcceptance, GiftCardTransaction
 from .invoices import Invoice, InvoiceLine, invoice_filename
 from .items import (
     Item, ItemAddOn, ItemBundle, ItemCategory, ItemVariation, Question,

src/pretix/base/models/auth.py

@@ -1,5 +1,9 @@
+import binascii
+import json
 from datetime import timedelta
+from urllib.parse import urlparse
 
+import webauthn
 from django.conf import settings
 from django.contrib.auth.models import (
     AbstractBaseUser, BaseUserManager, PermissionsMixin,
@@ -13,6 +17,9 @@ from django.utils.timezone import now
 from django.utils.translation import ugettext_lazy as _
 from django_otp.models import Device
 from django_scopes import scopes_disabled
+from u2flib_server.utils import (
+    pub_key_from_der, websafe_decode, websafe_encode,
+)
 
 from pretix.base.i18n import language
 from pretix.helpers.urls import build_absolute_uri
@@ -102,6 +109,7 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
         help_text=_('If turned off, you will not get any notifications.')
     )
     notifications_token = models.CharField(max_length=255, default=generate_notifications_token)
+    auth_backend = models.CharField(max_length=255, default='native')
 
     objects = UserManager()
 
@@ -176,6 +184,7 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
                     'url': build_absolute_uri('control:user.settings')
                 },
                 event=None,
+                user=self,
                 locale=self.locale
             )
         except SendMailException:
@@ -191,9 +200,13 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
                 'url': (build_absolute_uri('control:auth.forgot.recover')
                         + '?id=%d&token=%s' % (self.id, default_token_generator.make_token(self)))
             },
-            None, locale=self.locale
+            None, locale=self.locale, user=self
         )
 
+    @property
+    def top_logentries(self):
+        return self.all_logentries
+
     @property
     def all_logentries(self):
         from pretix.base.models import LogEntry
@@ -322,6 +335,25 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
             | Q(id__in=self.teams.filter(**kwargs).values_list('limit_events__id', flat=True))
         )
 
+    @scopes_disabled()
+    def get_organizers_with_permission(self, permission, request=None):
+        """
+        Returns a queryset of organizers the user has a specific permissions to.
+
+        :param request: The current request (optional). Required to detect staff sessions properly.
+        :return: Iterable of Organizers
+        """
+        from .event import Organizer
+
+        if request and self.has_active_staff_session(request.session.session_key):
+            return Organizer.objects.all()
+
+        kwargs = {permission: True}
+
+        return Organizer.objects.filter(
+            id__in=self.teams.filter(**kwargs).values_list('organizer', flat=True)
+        )
+
     def has_active_staff_session(self, session_key=None):
         """
         Returns whether or not a user has an active staff session (formerly known as superuser session)
@@ -375,3 +407,49 @@ class StaffSessionAuditLog(models.Model):
 
 class U2FDevice(Device):
     json_data = models.TextField()
+
+    @property
+    def webauthnuser(self):
+        d = json.loads(self.json_data)
+        # We manually need to convert the pubkey from DER format (used in our
+        # former U2F implementation) to the format required by webauthn. This
+        # is based on the following example:
+        # https://www.w3.org/TR/webauthn/#sctn-encoded-credPubKey-examples
+        pub_key = pub_key_from_der(websafe_decode(d['publicKey'].replace('+', '-').replace('/', '_')))
+        pub_key = binascii.unhexlify(
+            'A5010203262001215820{:064x}225820{:064x}'.format(
+                pub_key.public_numbers().x, pub_key.public_numbers().y
+            )
+        )
+        return webauthn.WebAuthnUser(
+            d['keyHandle'],
+            self.user.email,
+            str(self.user),
+            settings.SITE_URL,
+            d['keyHandle'],
+            websafe_encode(pub_key),
+            1,
+            urlparse(settings.SITE_URL).netloc
+        )
+
+
+class WebAuthnDevice(Device):
+    credential_id = models.CharField(max_length=255, null=True, blank=True)
+    rp_id = models.CharField(max_length=255, null=True, blank=True)
+    icon_url = models.CharField(max_length=255, null=True, blank=True)
+    ukey = models.TextField(null=True)
+    pub_key = models.TextField(null=True)
+    sign_count = models.IntegerField(default=0)
+
+    @property
+    def webauthnuser(self):
+        return webauthn.WebAuthnUser(
+            self.ukey,
+            self.user.email,
+            str(self.user),
+            settings.SITE_URL,
+            self.credential_id,
+            self.pub_key,
+            self.sign_count,
+            urlparse(settings.SITE_URL).netloc
+        )

src/pretix/base/models/checkin.py

@@ -1,11 +1,11 @@
 from django.db import models
-from django.db.models import Case, Count, F, OuterRef, Q, Subquery, When
-from django.db.models.functions import Coalesce
+from django.db.models import Exists, OuterRef
 from django.utils.timezone import now
 from django.utils.translation import pgettext_lazy, ugettext_lazy as _
 from django_scopes import ScopedManager
 
 from pretix.base.models import LoggedModel
+from pretix.base.models.fields import MultiStringField
 
 
 class CheckinList(LoggedModel):
@@ -18,142 +18,69 @@ class CheckinList(LoggedModel):
     include_pending = models.BooleanField(verbose_name=pgettext_lazy('checkin', 'Include pending orders'),
                                           default=False,
                                           help_text=_('With this option, people will be able to check in even if the '
-                                                      'order have not been paid. This only works with pretixdesk '
-                                                      '0.3.0 or newer or pretixdroid 1.9 or newer.'))
+                                                      'order have not been paid.'))
+
+    auto_checkin_sales_channels = MultiStringField(
+        default=[],
+        blank=True,
+        verbose_name=_('Sales channels to automatically check in'),
+        help_text=_('All items on this check-in list will be automatically marked as checked-in when purchased through '
+                    'any of the selected sales channels. This option can be useful when tickets sold at the box office '
+                    'are not checked again before entry and should be considered validated directly upon purchase.')
+    )
 
     objects = ScopedManager(organizer='event__organizer')
 
     class Meta:
         ordering = ('subevent__date_from', 'name')
 
+    @property
+    def positions(self):
+        from . import OrderPosition, Order
+
+        qs = OrderPosition.objects.filter(
+            order__event=self.event,
+            order__status__in=[Order.STATUS_PAID, Order.STATUS_PENDING] if self.include_pending else [Order.STATUS_PAID],
+            subevent=self.subevent
+        )
+        if not self.all_products:
+            qs = qs.filter(item__in=self.limit_products.values_list('id', flat=True))
+        return qs
+
+    @property
+    def checkin_count(self):
+        return self.event.cache.get_or_set(
+            'checkin_list_{}_checkin_count'.format(self.pk),
+            lambda: self.positions.annotate(
+                checkedin=Exists(Checkin.objects.filter(list_id=self.pk, position=OuterRef('pk')))
+            ).filter(
+                checkedin=True
+            ).count(),
+            60
+        )
+
+    @property
+    def percent(self):
+        pc = self.position_count
+        return round(self.checkin_count * 100 / pc) if pc else 0
+
+    @property
+    def position_count(self):
+        return self.event.cache.get_or_set(
+            'checkin_list_{}_position_count'.format(self.pk),
+            lambda: self.positions.count(),
+            60
+        )
+
+    def touch(self):
+        self.event.cache.delete('checkin_list_{}_position_count'.format(self.pk))
+        self.event.cache.delete('checkin_list_{}_checkin_count'.format(self.pk))
+
     @staticmethod
     def annotate_with_numbers(qs, event):
-        """
-        Modifies a queryset of checkin lists by annotating it with the number of order positions and
-        checkins associated with it.
-        """
-        # Import here to prevent circular import
-        from . import Order, OrderPosition, Item
-
-        # This is the mother of all subqueries. Sorry. I try to explain it, at least?
-        # First, we prepare a subquery that for every check-in that belongs to a paid-order
-        # position and to the list in question. Then, we check that it also belongs to the
-        # correct subevent (just to be sure) and aggregate over lists (so, over everything,
-        # since we filtered by lists).
-        cqs_paid = Checkin.objects.filter(
-            position__order__event=event,
-            position__order__status=Order.STATUS_PAID,
-            list=OuterRef('pk')
-        ).filter(
-            # This assumes that in an event with subevents, *all* positions have subevents
-            # and *all* checkin lists have a subevent assigned
-            Q(position__subevent=OuterRef('subevent'))
-            | (Q(position__subevent__isnull=True))
-        ).order_by().values('list').annotate(
-            c=Count('*')
-        ).values('c')
-        cqs_paid_and_pending = Checkin.objects.filter(
-            position__order__event=event,
-            position__order__status__in=[Order.STATUS_PAID, Order.STATUS_PENDING],
-            list=OuterRef('pk')
-        ).filter(
-            # This assumes that in an event with subevents, *all* positions have subevents
-            # and *all* checkin lists have a subevent assigned
-            Q(position__subevent=OuterRef('subevent'))
-            | (Q(position__subevent__isnull=True))
-        ).order_by().values('list').annotate(
-            c=Count('*')
-        ).values('c')
-
-        # Now for the hard part: getting all order positions that contribute to this list. This
-        # requires us to use TWO subqueries. The first one, pqs_all, will only be used for check-in
-        # lists that contain all the products of the event. This is the simpler one, it basically
-        # looks like the check-in counter above.
-        pqs_all_paid = OrderPosition.objects.filter(
-            order__event=event,
-            order__status=Order.STATUS_PAID,
-        ).filter(
-            # This assumes that in an event with subevents, *all* positions have subevents
-            # and *all* checkin lists have a subevent assigned
-            Q(subevent=OuterRef('subevent'))
-            | (Q(subevent__isnull=True))
-        ).order_by().values('order__event').annotate(
-            c=Count('*')
-        ).values('c')
-        pqs_all_paid_and_pending = OrderPosition.objects.filter(
-            order__event=event,
-            order__status__in=[Order.STATUS_PAID, Order.STATUS_PENDING]
-        ).filter(
-            # This assumes that in an event with subevents, *all* positions have subevents
-            # and *all* checkin lists have a subevent assigned
-            Q(subevent=OuterRef('subevent'))
-            | (Q(subevent__isnull=True))
-        ).order_by().values('order__event').annotate(
-            c=Count('*')
-        ).values('c')
-
-        # Now we need a subquery for the case of checkin lists that are limited to certain
-        # products. We cannot use OuterRef("limit_products") since that would do a cross-product
-        # with the products table and we'd get duplicate rows in the output with different annotations
-        # on them, which isn't useful at all. Therefore, we need to add a second layer of subqueries
-        # to retrieve all of those items and then check if the item_id is IN this subquery result.
-        pqs_limited_paid = OrderPosition.objects.filter(
-            order__event=event,
-            order__status=Order.STATUS_PAID,
-            item_id__in=Subquery(Item.objects.filter(checkinlist__pk=OuterRef(OuterRef('pk'))).values('pk'))
-        ).filter(
-            # This assumes that in an event with subevents, *all* positions have subevents
-            # and *all* checkin lists have a subevent assigned
-            Q(subevent=OuterRef('subevent'))
-            | (Q(subevent__isnull=True))
-        ).order_by().values('order__event').annotate(
-            c=Count('*')
-        ).values('c')
-        pqs_limited_paid_and_pending = OrderPosition.objects.filter(
-            order__event=event,
-            order__status__in=[Order.STATUS_PAID, Order.STATUS_PENDING],
-            item_id__in=Subquery(Item.objects.filter(checkinlist__pk=OuterRef(OuterRef('pk'))).values('pk'))
-        ).filter(
-            # This assumes that in an event with subevents, *all* positions have subevents
-            # and *all* checkin lists have a subevent assigned
-            Q(subevent=OuterRef('subevent'))
-            | (Q(subevent__isnull=True))
-        ).order_by().values('order__event').annotate(
-            c=Count('*')
-        ).values('c')
-
-        # Finally, we put all of this together. We force empty subquery aggregates to 0 by using Coalesce()
-        # and decide which subquery to use for this row. In the end, we compute an integer percentage in case
-        # we want to display a progress bar.
-        return qs.annotate(
-            checkin_count=Coalesce(
-                Case(
-                    When(include_pending=True, then=Subquery(cqs_paid_and_pending, output_field=models.IntegerField())),
-                    default=Subquery(cqs_paid, output_field=models.IntegerField()),
-                    output_field=models.IntegerField()
-                ),
-                0
-            ),
-            position_count=Coalesce(
-                Case(
-                    When(all_products=True, include_pending=False,
-                         then=Subquery(pqs_all_paid, output_field=models.IntegerField())),
-                    When(all_products=True, include_pending=True,
-                         then=Subquery(pqs_all_paid_and_pending, output_field=models.IntegerField())),
-                    When(all_products=False, include_pending=False,
-                         then=Subquery(pqs_limited_paid, output_field=models.IntegerField())),
-                    default=Subquery(pqs_limited_paid_and_pending, output_field=models.IntegerField()),
-                    output_field=models.IntegerField()
-                ),
-                0
-            )
-        ).annotate(
-            percent=Case(
-                When(position_count__gt=0, then=F('checkin_count') * 100 / F('position_count')),
-                default=0,
-                output_field=models.IntegerField()
-            )
-        )
+        # This is only kept for backwards-compatibility reasons. This method used to precompute .position_count
+        # and .checkin_count through a huge subquery chain, but was dropped for performance reasons.
+        return qs
 
     def __str__(self):
         return self.name
@@ -169,6 +96,7 @@ class Checkin(models.Model):
     list = models.ForeignKey(
         'pretixbase.CheckinList', related_name='checkins', on_delete=models.PROTECT,
     )
+    auto_checked_in = models.BooleanField(default=False)
 
     objects = ScopedManager(organizer='position__order__event__organizer')
 
@@ -182,8 +110,11 @@ class Checkin(models.Model):
 
     def save(self, **kwargs):
         self.position.order.touch()
+        self.list.event.cache.delete('checkin_count')
+        self.list.touch()
         super().save(**kwargs)
 
     def delete(self, **kwargs):
         self.position.order.touch()
         super().delete(**kwargs)
+        self.list.touch()

src/pretix/base/models/event.py

@@ -22,7 +22,7 @@ from i18nfield.fields import I18nCharField, I18nTextField
 
 from pretix.base.models.base import LoggedModel
 from pretix.base.reldate import RelativeDateWrapper
-from pretix.base.validators import EventSlugBlacklistValidator
+from pretix.base.validators import EventSlugBanlistValidator
 from pretix.helpers.database import GroupConcat
 from pretix.helpers.daterange import daterange
 from pretix.helpers.json import safe_string
@@ -65,7 +65,7 @@ class EventMixin:
             "SHORT_DATETIME_FORMAT" if self.settings.show_times else "DATE_FORMAT"
         )
 
-    def get_date_from_display(self, tz=None, show_times=True) -> str:
+    def get_date_from_display(self, tz=None, show_times=True, short=False) -> str:
         """
         Returns a formatted string containing the start date of the event with respect
         to the current locale and to the ``show_times`` setting.
@@ -73,7 +73,7 @@ class EventMixin:
         tz = tz or self.timezone
         return _date(
             self.date_from.astimezone(tz),
-            "DATETIME_FORMAT" if self.settings.show_times and show_times else "DATE_FORMAT"
+            ("SHORT_" if short else "") + ("DATETIME_FORMAT" if self.settings.show_times and show_times else "DATE_FORMAT")
         )
 
     def get_time_from_display(self, tz=None) -> str:
@@ -86,7 +86,7 @@ class EventMixin:
             self.date_from.astimezone(tz), "TIME_FORMAT"
         )
 
-    def get_date_to_display(self, tz=None) -> str:
+    def get_date_to_display(self, tz=None, short=False) -> str:
         """
         Returns a formatted string containing the start date of the event with respect
         to the current locale and to the ``show_times`` setting. Returns an empty string
@@ -97,7 +97,7 @@ class EventMixin:
             return ""
         return _date(
             self.date_to.astimezone(tz),
-            "DATETIME_FORMAT" if self.settings.show_times else "DATE_FORMAT"
+            ("SHORT_" if short else "") + ("DATETIME_FORMAT" if self.settings.show_times else "DATE_FORMAT")
         )
 
     def get_date_range_display(self, tz=None, force_show_end=False) -> str:
@@ -291,7 +291,7 @@ class Event(EventMixin, LoggedModel):
                 regex="^[a-zA-Z0-9.-]+$",
                 message=_("The slug may only contain letters, numbers, dots and dashes."),
             ),
-            EventSlugBlacklistValidator()
+            EventSlugBanlistValidator()
         ],
         verbose_name=_("Short form"),
     )
@@ -324,6 +324,14 @@ class Event(EventMixin, LoggedModel):
         max_length=200,
         verbose_name=_("Location"),
     )
+    geo_lat = models.FloatField(
+        verbose_name=_("Latitude"),
+        null=True, blank=True,
+    )
+    geo_lon = models.FloatField(
+        verbose_name=_("Longitude"),
+        null=True, blank=True,
+    )
     plugins = models.TextField(
         null=False, blank=True,
         verbose_name=_("Plugins"),
@@ -608,22 +616,24 @@ class Event(EventMixin, LoggedModel):
             question_map=question_map
         )
 
-    def get_payment_providers(self) -> dict:
+    def get_payment_providers(self, cached=False) -> dict:
         """
         Returns a dictionary of initialized payment providers mapped by their identifiers.
         """
         from ..signals import register_payment_providers
 
-        responses = register_payment_providers.send(self)
-        providers = {}
-        for receiver, response in responses:
-            if not isinstance(response, list):
-                response = [response]
-            for p in response:
-                pp = p(self)
-                providers[pp.identifier] = pp
+        if not cached or not hasattr(self, '_cached_payment_providers'):
+            responses = register_payment_providers.send(self)
+            providers = {}
+            for receiver, response in responses:
+                if not isinstance(response, list):
+                    response = [response]
+                for p in response:
+                    pp = p(self)
+                    providers[pp.identifier] = pp
 
-        return OrderedDict(sorted(providers.items(), key=lambda v: str(v[1].verbose_name)))
+            self._cached_payment_providers = OrderedDict(sorted(providers.items(), key=lambda v: str(v[1].verbose_name)))
+        return self._cached_payment_providers
 
     def get_html_mail_renderer(self):
         """
@@ -728,7 +738,7 @@ class Event(EventMixin, LoggedModel):
     def has_payment_provider(self):
         result = False
         for provider in self.get_payment_providers().values():
-            if provider.is_enabled and provider.identifier not in ('free', 'boxoffice', 'offsetting'):
+            if provider.is_enabled and provider.identifier not in ('free', 'boxoffice', 'offsetting', 'giftcard'):
                 result = True
                 break
         return result
@@ -824,18 +834,24 @@ class Event(EventMixin, LoggedModel):
 
     def enable_plugin(self, module, allow_restricted=False):
         plugins_active = self.get_plugins()
+        from pretix.presale.style import regenerate_css
 
         if module not in plugins_active:
             plugins_active.append(module)
             self.set_active_plugins(plugins_active, allow_restricted=allow_restricted)
 
+        regenerate_css.apply_async(args=(self.pk,))
+
     def disable_plugin(self, module):
         plugins_active = self.get_plugins()
+        from pretix.presale.style import regenerate_css
 
         if module in plugins_active:
             plugins_active.remove(module)
             self.set_active_plugins(plugins_active)
 
+        regenerate_css.apply_async(args=(self.pk,))
+
     @staticmethod
     def clean_has_subevents(event, has_subevents):
         if event is not None and event.has_subevents is not None:
@@ -921,6 +937,14 @@ class SubEvent(EventMixin, LoggedModel):
         max_length=200,
         verbose_name=_("Location"),
     )
+    geo_lat = models.FloatField(
+        verbose_name=_("Latitude"),
+        null=True, blank=True,
+    )
+    geo_lon = models.FloatField(
+        verbose_name=_("Longitude"),
+        null=True, blank=True
+    )
     frontpage_text = I18nTextField(
         null=True, blank=True,
         verbose_name=_("Frontpage text")

src/pretix/base/models/giftcards.py

@@ -0,0 +1,112 @@
+from decimal import Decimal
+
+from django.conf import settings
+from django.db import models
+from django.db.models import Sum
+from django.utils.crypto import get_random_string
+from django.utils.translation import ugettext_lazy as _
+
+from pretix.base.banlist import banned
+from pretix.base.models import LoggedModel
+
+
+def gen_giftcard_secret():
+    charset = list('ABCDEFGHJKLMNPQRSTUVWXYZ3789')
+    while True:
+        code = get_random_string(length=settings.ENTROPY['giftcard_secret'], allowed_chars=charset)
+        if not banned(code) and not GiftCard.objects.filter(secret=code).exists():
+            return code
+
+
+class GiftCardAcceptance(models.Model):
+    issuer = models.ForeignKey(
+        'Organizer',
+        related_name='gift_card_collector_acceptance',
+        on_delete=models.CASCADE
+    )
+    collector = models.ForeignKey(
+        'Organizer',
+        related_name='gift_card_issuer_acceptance',
+        on_delete=models.CASCADE
+    )
+
+
+class GiftCard(LoggedModel):
+    issuer = models.ForeignKey(
+        'Organizer',
+        related_name='issued_gift_cards',
+        on_delete=models.PROTECT,
+    )
+    issued_in = models.ForeignKey(
+        'OrderPosition',
+        related_name='issued_gift_cards',
+        on_delete=models.PROTECT,
+        null=True, blank=True
+    )
+    issuance = models.DateTimeField(
+        auto_now_add=True,
+    )
+    secret = models.CharField(
+        max_length=190,
+        default=gen_giftcard_secret,
+        db_index=True,
+        verbose_name=_('Gift card code'),
+    )
+    testmode = models.BooleanField(
+        verbose_name=_('Test mode card'),
+        default=False
+    )
+    CURRENCY_CHOICES = [(c.alpha_3, c.alpha_3 + " - " + c.name) for c in settings.CURRENCIES]
+    currency = models.CharField(max_length=10, choices=CURRENCY_CHOICES)
+
+    def __str__(self):
+        return self.secret
+
+    @property
+    def value(self):
+        return self.transactions.aggregate(s=Sum('value'))['s'] or Decimal('0.00')
+
+    def accepted_by(self, organizer):
+        return self.issuer == organizer or GiftCardAcceptance.objects.filter(issuer=self.issuer, collector=organizer).exists()
+
+    class Meta:
+        unique_together = (('secret', 'issuer'),)
+
+
+class GiftCardTransaction(models.Model):
+    card = models.ForeignKey(
+        'GiftCard',
+        related_name='transactions',
+        on_delete=models.PROTECT
+    )
+    datetime = models.DateTimeField(
+        auto_now_add=True
+    )
+    value = models.DecimalField(
+        decimal_places=2,
+        max_digits=10
+    )
+    order = models.ForeignKey(
+        'Order',
+        related_name='gift_card_transactions',
+        null=True,
+        blank=True,
+        on_delete=models.PROTECT
+    )
+    payment = models.ForeignKey(
+        'OrderPayment',
+        related_name='gift_card_transactions',
+        null=True,
+        blank=True,
+        on_delete=models.PROTECT
+    )
+    refund = models.ForeignKey(
+        'OrderRefund',
+        related_name='gift_card_transactions',
+        null=True,
+        blank=True,
+        on_delete=models.PROTECT
+    )
+
+    class Meta:
+        ordering = ("datetime",)

src/pretix/base/models/invoices.py

@@ -1,6 +1,7 @@
 import string
 from decimal import Decimal
 
+import pycountry
 from django.db import DatabaseError, models, transaction
 from django.db.models import Max
 from django.db.models.functions import Cast
@@ -11,6 +12,8 @@ from django.utils.translation import pgettext
 from django_countries.fields import CountryField
 from django_scopes import ScopedManager
 
+from pretix.base.settings import COUNTRIES_WITH_STATE_IN_ADDRESS
+
 
 def invoice_filename(instance, filename: str) -> str:
     secret = get_random_string(length=16, allowed_chars=string.ascii_letters + string.digits)
@@ -90,6 +93,7 @@ class Invoice(models.Model):
     invoice_to_street = models.TextField(null=True)
     invoice_to_zipcode = models.CharField(max_length=190, null=True)
     invoice_to_city = models.TextField(null=True)
+    invoice_to_state = models.CharField(max_length=190, null=True)
     invoice_to_country = CountryField(null=True)
     invoice_to_vat_id = models.TextField(null=True)
     invoice_to_beneficiary = models.TextField(null=True)
@@ -140,11 +144,21 @@ class Invoice(models.Model):
     def address_invoice_to(self):
         if self.invoice_to and not self.invoice_to_company and not self.invoice_to_name:
             return self.invoice_to
+
+        state_name = ""
+        if self.invoice_to_state:
+            state_name = self.invoice_to_state
+            if str(self.invoice_to_country) in COUNTRIES_WITH_STATE_IN_ADDRESS:
+                if COUNTRIES_WITH_STATE_IN_ADDRESS[str(self.invoice_to_country)][1] == 'long':
+                    state_name = pycountry.subdivisions.get(
+                        code='{}-{}'.format(self.invoice_to_country, self.invoice_to_state)
+                    ).name
+
         parts = [
             self.invoice_to_company,
             self.invoice_to_name,
             self.invoice_to_street,
-            (self.invoice_to_zipcode or "") + " " + (self.invoice_to_city or ""),
+            ((self.invoice_to_zipcode or "") + " " + (self.invoice_to_city or "") + " " + (state_name or "")).strip(),
             self.invoice_to_country.name if self.invoice_to_country else "",
         ]
         return '\n'.join([p.strip() for p in parts if p and p.strip()])

src/pretix/base/models/items.py

@@ -242,6 +242,8 @@ class Item(LoggedModel):
     :type require_approval: bool
     :param sales_channels: Sales channels this item is available on.
     :type sales_channels: bool
+    :param issue_giftcard: If ``True``, buying this product will give you a gift card with the value of the product's price
+    :type issue_giftcard: bool
     """
 
     objects = ItemQuerySetManager()
@@ -413,6 +415,12 @@ class Item(LoggedModel):
         verbose_name=_('Sales channels'),
         default=['web']
     )
+    issue_giftcard = models.BooleanField(
+        verbose_name=_('This product is a gift card'),
+        help_text=_('When a customer buys this product, they will get a gift card with a value corresponding to the '
+                    'product price.'),
+        default=False
+    )
     # !!! Attention: If you add new fields here, also add them to the copying code in
     # pretix/control/forms/item.py if applicable.
 
@@ -982,6 +990,7 @@ class Question(LoggedModel):
         (TYPE_DATETIME, _("Date and time")),
         (TYPE_COUNTRYCODE, _("Country code (ISO 3166-1 alpha-2)")),
     )
+    UNLOCALIZED_TYPES = [TYPE_DATE, TYPE_TIME, TYPE_DATETIME]
 
     event = models.ForeignKey(
         Event,
@@ -1024,8 +1033,6 @@ class Question(LoggedModel):
     )
     ask_during_checkin = models.BooleanField(
         verbose_name=_('Ask during check-in instead of in the ticket buying process'),
-        help_text=_('This will only work if you handle your check-in with pretixdroid 1.8 or newer or '
-                    'pretixdesk 0.2 or newer.'),
         default=False
     )
     hidden = models.BooleanField(
@@ -1033,6 +1040,10 @@ class Question(LoggedModel):
         help_text=_('This question will only show up in the backend.'),
         default=False
     )
+    print_on_invoice = models.BooleanField(
+        verbose_name=_('Print answer on invoices'),
+        default=False
+    )
     dependency_question = models.ForeignKey(
         'Question', null=True, blank=True, on_delete=models.SET_NULL, related_name='dependent_questions'
     )

src/pretix/base/models/orders.py

@@ -9,6 +9,7 @@ from decimal import Decimal
 from typing import Any, Dict, List, Union
 
 import dateutil
+import pycountry
 import pytz
 from django.conf import settings
 from django.db import models, transaction
@@ -30,12 +31,15 @@ from django_scopes import ScopedManager, scopes_disabled
 from i18nfield.strings import LazyI18nString
 from jsonfallback.fields import FallbackJSONField
 
+from pretix.base.banlist import banned
 from pretix.base.decimal import round_decimal
+from pretix.base.email import get_email_context
 from pretix.base.i18n import language
 from pretix.base.models import User
 from pretix.base.reldate import RelativeDateWrapper
 from pretix.base.services.locking import NoLockManager
 from pretix.base.settings import PERSON_NAME_SCHEMES
+from pretix.base.signals import order_gracefully_delete
 
 from .base import LockModel, LoggedModel
 from .event import Event, SubEvent
@@ -198,7 +202,7 @@ class Order(LockModel, LoggedModel):
         return self.full_code
 
     def gracefully_delete(self, user=None, auth=None):
-        from . import Voucher
+        from . import Voucher, GiftCard, GiftCardTransaction
 
         if not self.testmode:
             raise TypeError("Only test mode orders can be deleted.")
@@ -209,11 +213,17 @@ class Order(LockModel, LoggedModel):
             }
         )
 
+        order_gracefully_delete.send(self.event, order=self)
+
         if self.status != Order.STATUS_CANCELED:
             for position in self.positions.all():
                 if position.voucher:
                     Voucher.objects.filter(pk=position.voucher.pk).update(redeemed=Greatest(0, F('redeemed') - 1))
 
+        GiftCardTransaction.objects.filter(payment__in=self.payments.all()).update(payment=None)
+        GiftCardTransaction.objects.filter(refund__in=self.refunds.all()).update(refund=None)
+        GiftCardTransaction.objects.filter(order=self).update(order=None)
+        GiftCard.objects.filter(issued_in__in=self.positions.all()).update(issued_in=None)
         OrderPosition.all.filter(order=self, addon_to__isnull=False).delete()
         OrderPosition.all.filter(order=self).delete()
         OrderFee.all.filter(order=self).delete()
@@ -455,11 +465,15 @@ class Order(LockModel, LoggedModel):
         positions = list(
             self.positions.all().annotate(
                 has_checkin=Exists(Checkin.objects.filter(position_id=OuterRef('pk')))
-            ).select_related('item')
+            ).select_related('item').prefetch_related('issued_gift_cards')
         )
         cancelable = all([op.item.allow_cancel and not op.has_checkin for op in positions])
         if not cancelable or not positions:
             return False
+        for op in positions:
+            for gc in op.issued_gift_cards.all():
+                if gc.value != op.price:
+                    return False
         if self.user_cancel_deadline and now() > self.user_cancel_deadline:
             return False
         if self.status == Order.STATUS_PENDING:
@@ -534,16 +548,30 @@ class Order(LockModel, LoggedModel):
         # handwriting (2/Z, 4/A, 5/S, 6/G). This allows for better detection e.g. in incoming wire transfers that
         # might include OCR'd handwritten text
         charset = list('ABCDEFGHJKLMNPQRSTUVWXYZ3789')
+        iteration = 0
+        length = settings.ENTROPY['order_code']
         while True:
-            code = get_random_string(length=settings.ENTROPY['order_code'], allowed_chars=charset)
+            code = get_random_string(length=length, allowed_chars=charset)
+            iteration += 1
+
+            if banned(code):
+                continue
+
             if self.testmode:
                 # Subtle way to recognize test orders while debugging: They all contain a 0 at the second place,
                 # even though zeros are not used outside test mode.
                 code = code[0] + "0" + code[2:]
+
             if not Order.objects.filter(event__organizer=self.event.organizer, code=code).exists():
                 self.code = code
                 return
 
+            if iteration > 20:
+                # Safeguard: If we don't find an unused and non-blacklisted code within 20 iterations, we increase
+                # the length.
+                length += 1
+                iteration = 0
+
     @property
     def can_modify_answers(self) -> bool:
         """
@@ -696,7 +724,8 @@ class Order(LockModel, LoggedModel):
     def send_mail(self, subject: str, template: Union[str, LazyI18nString],
                   context: Dict[str, Any]=None, log_entry_type: str='pretix.event.order.email.sent',
                   user: User=None, headers: dict=None, sender: str=None, invoices: list=None,
-                  auth=None, attach_tickets=False, position: 'OrderPosition'=None):
+                  auth=None, attach_tickets=False, position: 'OrderPosition'=None, auto_email=True,
+                  attach_ical=False):
         """
         Sends an email to the user that placed this order. Basically, this method does two things:
 
@@ -713,6 +742,7 @@ class Order(LockModel, LoggedModel):
         :param headers: Dictionary with additional mail headers
         :param sender: Custom email sender.
         :param attach_tickets: Attach tickets of this order, if they are existing and ready to download
+        :param attach_ical: Attach relevant ICS files
         :param position: An order position this refers to. If given, no invoices will be attached, the tickets will
                          only be attached for this position and child positions, the link will only point to the
                          position and the attendee email will be used if available.
@@ -736,7 +766,7 @@ class Order(LockModel, LoggedModel):
                     recipient, subject, template, context,
                     self.event, self.locale, self, headers=headers, sender=sender,
                     invoices=invoices, attach_tickets=attach_tickets,
-                    position=position
+                    position=position, auto_email=auto_email, attach_ical=attach_ical
                 )
             except SendMailException:
                 raise
@@ -752,35 +782,19 @@ class Order(LockModel, LoggedModel):
                         'recipient': recipient,
                         'invoices': [i.pk for i in invoices] if invoices else [],
                         'attach_tickets': attach_tickets,
+                        'attach_ical': attach_ical,
                     }
                 )
 
     def resend_link(self, user=None, auth=None):
-        from pretix.multidomain.urlreverse import build_absolute_uri
-
         with language(self.locale):
-            try:
-                invoice_name = self.invoice_address.name
-                invoice_company = self.invoice_address.company
-            except InvoiceAddress.DoesNotExist:
-                invoice_name = ""
-                invoice_company = ""
             email_template = self.event.settings.mail_text_resend_link
-            email_context = {
-                'event': self.event.name,
-                'url': build_absolute_uri(self.event, 'presale:event.order.open', kwargs={
-                    'order': self.code,
-                    'secret': self.secret,
-                    'hash': self.email_confirm_hash()
-                }),
-                'invoice_name': invoice_name,
-                'invoice_company': invoice_company,
-            }
+            email_context = get_email_context(event=self.event, order=self)
             email_subject = _('Your order: %(code)s') % {'code': self.code}
             self.send_mail(
                 email_subject, email_template, email_context,
                 'pretix.event.order.email.resend', user=user, auth=auth,
-                attach_tickets=True
+                attach_tickets=True,
             )
 
     @property
@@ -1043,6 +1057,8 @@ class AbstractPosition(models.Model):
         }
 
         def question_is_visible(parentid, qvals):
+            if parentid not in question_cache:
+                return False
             parentq = question_cache[parentid]
             if parentq.dependency_question_id and not question_is_visible(parentq.dependency_question_id, parentq.dependency_values):
                 return False
@@ -1195,7 +1211,7 @@ class OrderPayment(models.Model):
         """
         Cached access to an instance of the payment provider in use.
         """
-        return self.order.event.get_payment_providers().get(self.provider)
+        return self.order.event.get_payment_providers(cached=True).get(self.provider)
 
     def _mark_paid(self, force, count_waitinglist, user, auth, ignore_date=False, overpaid=False):
         from pretix.base.signals import order_paid
@@ -1312,66 +1328,36 @@ class OrderPayment(models.Model):
 
     def _send_paid_mail_attendee(self, position, user):
         from pretix.base.services.mail import SendMailException
-        from pretix.multidomain.urlreverse import build_absolute_uri
 
         with language(self.order.locale):
-            name_scheme = PERSON_NAME_SCHEMES[self.order.event.settings.name_scheme]
             email_template = self.order.event.settings.mail_text_order_paid_attendee
-            email_context = {
-                'event': self.order.event.name,
-                'downloads': self.order.event.settings.get('ticket_download', as_type=bool),
-                'url': build_absolute_uri(self.order.event, 'presale:event.order.position', kwargs={
-                    'order': self.order.code,
-                    'secret': position.web_secret,
-                    'position': position.positionid
-                }),
-                'attendee_name': position.attendee_name,
-            }
-            for f, l, w in name_scheme['fields']:
-                email_context['attendee_name_%s' % f] = position.attendee_name_parts.get(f, '')
-
+            email_context = get_email_context(event=self.order.event, order=self.order, position=position)
             email_subject = _('Event registration confirmed: %(code)s') % {'code': self.order.code}
             try:
                 self.order.send_mail(
                     email_subject, email_template, email_context,
                     'pretix.event.order.email.order_paid', user,
                     invoices=[], position=position,
-                    attach_tickets=True
+                    attach_tickets=True,
+                    attach_ical=self.order.event.settings.mail_attach_ical
                 )
             except SendMailException:
                 logger.exception('Order paid email could not be sent')
 
     def _send_paid_mail(self, invoice, user, mail_text):
         from pretix.base.services.mail import SendMailException
-        from pretix.multidomain.urlreverse import build_absolute_uri
 
         with language(self.order.locale):
-            try:
-                invoice_name = self.order.invoice_address.name
-                invoice_company = self.order.invoice_address.company
-            except InvoiceAddress.DoesNotExist:
-                invoice_name = ""
-                invoice_company = ""
             email_template = self.order.event.settings.mail_text_order_paid
-            email_context = {
-                'event': self.order.event.name,
-                'url': build_absolute_uri(self.order.event, 'presale:event.order.open', kwargs={
-                    'order': self.order.code,
-                    'secret': self.order.secret,
-                    'hash': self.order.email_confirm_hash()
-                }),
-                'downloads': self.order.event.settings.get('ticket_download', as_type=bool),
-                'invoice_name': invoice_name,
-                'invoice_company': invoice_company,
-                'payment_info': mail_text
-            }
+            email_context = get_email_context(event=self.order.event, order=self.order, payment_info=mail_text)
             email_subject = _('Payment received for your order: %(code)s') % {'code': self.order.code}
             try:
                 self.order.send_mail(
                     email_subject, email_template, email_context,
                     'pretix.event.order.email.order_paid', user,
                     invoices=[invoice] if invoice and self.order.event.settings.invoice_email_attachment else [],
-                    attach_tickets=True
+                    attach_tickets=True,
+                    attach_ical=self.order.event.settings.mail_attach_ical
                 )
             except SendMailException:
                 logger.exception('Order paid email could not be sent')
@@ -1913,25 +1899,26 @@ class OrderPosition(AbstractPosition):
         """
         from pretix.base.services.mail import SendMailException, mail, render_mail
 
-        if not self.email:
+        if not self.attendee_email:
             return
 
         for k, v in self.event.meta_data.items():
             context['meta_' + k] = v
 
-        with language(self.locale):
-            recipient = self.email
+        with language(self.order.locale):
+            recipient = self.attendee_email
             try:
                 email_content = render_mail(template, context)
                 mail(
                     recipient, subject, template, context,
-                    self.event, self.locale, self, headers, sender,
+                    self.event, self.order.locale, order=self.order, headers=headers, sender=sender,
+                    position=self,
                     invoices=invoices, attach_tickets=attach_tickets
                 )
             except SendMailException:
                 raise
             else:
-                self.log_action(
+                self.order.log_action(
                     log_entry_type,
                     user=user,
                     auth=auth,
@@ -1944,6 +1931,18 @@ class OrderPosition(AbstractPosition):
                     }
                 )
 
+    def resend_link(self, user=None, auth=None):
+
+        with language(self.order.locale):
+            email_template = self.event.settings.mail_text_resend_link
+            email_context = get_email_context(event=self.order.event, order=self.order, position=self)
+            email_subject = _('Your event registration: %(code)s') % {'code': self.order.code}
+            self.send_mail(
+                email_subject, email_template, email_context,
+                'pretix.event.order.email.resend', user=user, auth=auth,
+                attach_tickets=True
+            )
+
 
 class CartPosition(AbstractPosition):
     """
@@ -2019,6 +2018,7 @@ class InvoiceAddress(models.Model):
     city = models.CharField(max_length=255, verbose_name=_('City'), blank=False)
     country_old = models.CharField(max_length=255, verbose_name=_('Country'), blank=False)
     country = CountryField(verbose_name=_('Country'), blank=False, blank_label=_('Select country'))
+    state = models.CharField(max_length=255, verbose_name=pgettext_lazy('address', 'State'), blank=True)
     vat_id = models.CharField(max_length=255, blank=True, verbose_name=_('VAT ID'),
                               help_text=_('Only for business customers within the EU.'))
     vat_id_validated = models.BooleanField(default=False)
@@ -2045,6 +2045,22 @@ class InvoiceAddress(models.Model):
             self.name_parts = {}
         super().save(**kwargs)
 
+    @property
+    def state_name(self):
+        sd = pycountry.subdivisions.get(code='{}-{}'.format(self.country, self.state))
+        if sd:
+            return sd.name
+        return self.state
+
+    @property
+    def state_for_address(self):
+        from pretix.base.settings import COUNTRIES_WITH_STATE_IN_ADDRESS
+        if not self.state or str(self.country) not in COUNTRIES_WITH_STATE_IN_ADDRESS:
+            return ""
+        if COUNTRIES_WITH_STATE_IN_ADDRESS[str(self.country)][1] == 'long':
+            return self.state_name
+        return self.state
+
     @property
     def name(self):
         if not self.name_parts:

src/pretix/base/models/organizer.py

@@ -2,12 +2,13 @@ import string
 
 from django.core.validators import RegexValidator
 from django.db import models
+from django.db.models import Exists, OuterRef, Q
 from django.utils.crypto import get_random_string
 from django.utils.functional import cached_property
 from django.utils.translation import ugettext_lazy as _
 
 from pretix.base.models.base import LoggedModel
-from pretix.base.validators import OrganizerSlugBlacklistValidator
+from pretix.base.validators import OrganizerSlugBanlistValidator
 
 from ..settings import settings_hierarkey
 from .auth import User
@@ -39,7 +40,7 @@ class Organizer(LoggedModel):
                 regex="^[a-zA-Z0-9.-]+$",
                 message=_("The slug may only contain letters, numbers, dots and dashes.")
             ),
-            OrganizerSlugBlacklistValidator()
+            OrganizerSlugBanlistValidator()
         ],
         verbose_name=_("Short form"),
         unique=True
@@ -82,6 +83,24 @@ class Organizer(LoggedModel):
 
         return ObjectRelatedCache(self)
 
+    @property
+    def has_gift_cards(self):
+        return self.cache.get_or_set(
+            key='has_gift_cards',
+            timeout=15,
+            default=lambda: self.issued_gift_cards.exists() or self.gift_card_issuer_acceptance.exists()
+        )
+
+    @property
+    def accepted_gift_cards(self):
+        from .giftcards import GiftCard, GiftCardAcceptance
+
+        return GiftCard.objects.annotate(
+            accepted=Exists(GiftCardAcceptance.objects.filter(issuer=OuterRef('issuer'), collector=self))
+        ).filter(
+            Q(issuer=self) | Q(accepted=True)
+        )
+
     def allow_delete(self):
         from . import Order, Invoice
         return (
@@ -156,6 +175,10 @@ class Team(LoggedModel):
         help_text=_('Someone with this setting can get access to most data of all of your events, i.e. via privacy '
                     'reports, so be careful who you add to this team!')
     )
+    can_manage_gift_cards = models.BooleanField(
+        default=False,
+        verbose_name=_("Can manage gift cards")
+    )
 
     can_change_event_settings = models.BooleanField(
         default=False,

src/pretix/base/models/tax.py

@@ -85,6 +85,12 @@ EU_CURRENCIES = {
 }
 
 
+def cc_to_vat_prefix(country_code):
+    if country_code == 'GR':
+        return 'EL'
+    return country_code
+
+
 class TaxRule(LoggedModel):
     event = models.ForeignKey('Event', related_name='tax_rules', on_delete=models.CASCADE)
     name = I18nCharField(

src/pretix/base/models/vouchers.py

@@ -10,6 +10,7 @@ from django.utils.timezone import now
 from django.utils.translation import pgettext_lazy, ugettext_lazy as _
 from django_scopes import ScopedManager, scopes_disabled
 
+from pretix.base.banlist import banned
 from pretix.base.models import SeatCategoryMapping
 
 from ..decimal import round_decimal
@@ -21,9 +22,12 @@ from .orders import Order
 
 def _generate_random_code(prefix=None):
     charset = list('ABCDEFGHKLMNPQRSTUVWXYZ23456789')
+    rnd = None
+    while not rnd or banned(rnd):
+        rnd = get_random_string(length=settings.ENTROPY['voucher_code'], allowed_chars=charset)
     if prefix:
-        return prefix + get_random_string(length=settings.ENTROPY['voucher_code'], allowed_chars=charset)
-    return get_random_string(length=settings.ENTROPY['voucher_code'], allowed_chars=charset)
+        return prefix + rnd
+    return rnd
 
 
 @scopes_disabled()

src/pretix/base/models/waitinglist.py

@@ -6,10 +6,10 @@ from django.utils.timezone import now
 from django.utils.translation import pgettext_lazy, ugettext_lazy as _
 from django_scopes import ScopedManager
 
+from pretix.base.email import get_email_context
 from pretix.base.i18n import language
 from pretix.base.models import Voucher
 from pretix.base.services.mail import mail
-from pretix.multidomain.urlreverse import build_absolute_uri
 
 from .base import LoggedModel
 from .event import Event, SubEvent
@@ -130,13 +130,7 @@ class WaitingListEntry(LoggedModel):
                 self.email,
                 _('You have been selected from the waitinglist for {event}').format(event=str(self.event)),
                 self.event.settings.mail_text_waiting_list,
-                {
-                    'event': self.event.name,
-                    'url': build_absolute_uri(self.event, 'presale:event.redeem') + '?voucher=' + self.voucher.code,
-                    'code': self.voucher.code,
-                    'product': str(self.item) + (' - ' + str(self.variation) if self.variation else ''),
-                    'hours': self.event.settings.waiting_list_hours,
-                },
+                get_email_context(event=self.event, waiting_list_entry=self),
                 self.event,
                 locale=self.locale
             )

src/pretix/base/notifications.py

@@ -3,7 +3,7 @@ from collections import OrderedDict, namedtuple
 
 from django.dispatch import receiver
 from django.utils.formats import date_format
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import pgettext_lazy, ugettext_lazy as _
 
 from pretix.base.models import Event, LogEntry
 from pretix.base.signals import register_notification_types
@@ -175,12 +175,23 @@ class ParametrizedOrderNotificationType(NotificationType):
             url=order_url
         )
         n.add_attribute(_('Event'), order.event.name)
+        if order.event.has_subevents:
+            ses = []
+            for se in self.event.subevents.filter(id__in=order.positions.values_list('subevent', flat=True)):
+                ses.append('{} ({})'.format(se.name, se.get_date_range_display()))
+            n.add_attribute(pgettext_lazy('subevent', 'Dates'), '\n'.join(ses))
+        else:
+            n.add_attribute(_('Event date'), order.event.get_date_range_display())
         n.add_attribute(_('Order code'), order.code)
         n.add_attribute(_('Order total'), money_filter(order.total, logentry.event.currency))
         n.add_attribute(_('Pending amount'), money_filter(order.pending_sum, logentry.event.currency))
         n.add_attribute(_('Order date'), date_format(order.datetime, 'SHORT_DATETIME_FORMAT'))
         n.add_attribute(_('Order status'), order.get_status_display())
         n.add_attribute(_('Order positions'), str(order.positions.count()))
+        items = []
+        for it in self.event.items.filter(id__in=order.positions.values_list('item', flat=True)):
+            items.append(str(it.name))
+        n.add_attribute(_('Purchased products'), '\n'.join(items))
         n.add_action(_('View order details'), order_url)
         return n
 

src/pretix/base/payment.py

@@ -7,7 +7,9 @@ from typing import Any, Dict, Union
 import pytz
 from django import forms
 from django.conf import settings
+from django.contrib import messages
 from django.core.exceptions import ImproperlyConfigured
+from django.db import transaction
 from django.dispatch import receiver
 from django.forms import Form
 from django.http import HttpRequest
@@ -20,8 +22,8 @@ from i18nfield.strings import LazyI18nString
 
 from pretix.base.forms import PlaceholderValidator
 from pretix.base.models import (
-    CartPosition, Event, InvoiceAddress, Order, OrderPayment, OrderRefund,
-    Quota,
+    CartPosition, Event, GiftCard, InvoiceAddress, Order, OrderPayment,
+    OrderRefund, Quota,
 )
 from pretix.base.reldate import RelativeDateField, RelativeDateWrapper
 from pretix.base.settings import SettingsSandbox
@@ -29,7 +31,8 @@ from pretix.base.signals import register_payment_providers
 from pretix.base.templatetags.money import money_filter
 from pretix.base.templatetags.rich_text import rich_text
 from pretix.helpers.money import DecimalTextInput
-from pretix.presale.views import get_cart_total
+from pretix.multidomain.urlreverse import eventreverse
+from pretix.presale.views import get_cart, get_cart_total
 from pretix.presale.views.cart import cart_session, get_or_create_cart_id
 
 logger = logging.getLogger(__name__)
@@ -531,7 +534,7 @@ class BasePaymentProvider:
         containing the URL the user will be redirected to. If you are done with your process
         you should return the user to the order's detail page.
 
-        If the payment is completed, you should call ``payment.confirm()``. Please note that ``this`` might
+        If the payment is completed, you should call ``payment.confirm()``. Please note that this might
         raise a ``Quota.QuotaExceededException`` if (and only if) the payment term of this order is over and
         some of the items are sold out. You should use the exception message to display a meaningful error
         to the user.
@@ -657,6 +660,15 @@ class BasePaymentProvider:
         obj.info = '{}'
         obj.save(update_fields=['info'])
 
+    def api_payment_details(self, payment: OrderPayment):
+        """
+        Will be called to populate the ``details`` parameter of the payment in the REST API.
+
+        :param payment: The payment in question.
+        :return: A serializable dictionary
+        """
+        return {}
+
 
 class PaymentException(Exception):
     pass
@@ -690,8 +702,9 @@ class FreeOrderProvider(BasePaymentProvider):
     def is_allowed(self, request: HttpRequest, total: Decimal=None) -> bool:
         from .services.cart import get_fees
 
+        cart = get_cart(request)
         total = get_cart_total(request)
-        total += sum([f.value for f in get_fees(self.event, request, total, None, None)])
+        total += sum([f.value for f in get_fees(self.event, request, total, None, None, cart)])
         return total == 0
 
     def order_change_allowed(self, order: Order) -> bool:
@@ -720,6 +733,12 @@ class BoxOfficeProvider(BasePaymentProvider):
     def order_change_allowed(self, order: Order) -> bool:
         return False
 
+    def api_payment_details(self, payment: OrderPayment):
+        return {
+            "pos_id": payment.info_data.get('pos_id', None),
+            "receipt_id": payment.info_data.get('receipt_id', None),
+        }
+
     def payment_control_render(self, request, payment) -> str:
         if not payment.info:
             return
@@ -852,7 +871,7 @@ class OffsettingProvider(BasePaymentProvider):
             provider='offsetting',
             info=json.dumps({'orders': [refund.order.code]})
         )
-        p.confirm()
+        p.confirm(ignore_date=True)
 
     @property
     def settings_form_fields(self) -> dict:
@@ -864,10 +883,216 @@ class OffsettingProvider(BasePaymentProvider):
     def order_change_allowed(self, order: Order) -> bool:
         return False
 
+    def api_payment_details(self, payment: OrderPayment):
+        return {
+            "orders": payment.info_data.get('orders', []),
+        }
+
     def payment_control_render(self, request: HttpRequest, payment: OrderPayment) -> str:
         return _('Balanced against orders: %s' % ', '.join(payment.info_data['orders']))
 
 
+class GiftCardPayment(BasePaymentProvider):
+    identifier = "giftcard"
+    verbose_name = _("Gift card")
+
+    @property
+    def settings_form_fields(self):
+        f = super().settings_form_fields
+        del f['_fee_abs']
+        del f['_fee_percent']
+        del f['_fee_reverse_calc']
+        del f['_total_min']
+        del f['_total_max']
+        del f['_invoice_text']
+        return f
+
+    @property
+    def test_mode_message(self) -> str:
+        return _("In test mode, only test cards will work.")
+
+    def is_allowed(self, request: HttpRequest, total: Decimal=None) -> bool:
+        return super().is_allowed(request, total) and self.event.organizer.has_gift_cards
+
+    def order_change_allowed(self, order: Order) -> bool:
+        return super().order_change_allowed(order) and self.event.organizer.has_gift_cards
+
+    def payment_form_render(self, request: HttpRequest, total: Decimal) -> str:
+        return get_template('pretixcontrol/giftcards/checkout.html').render({})
+
+    def checkout_confirm_render(self, request) -> str:
+        return get_template('pretixcontrol/giftcards/checkout_confirm.html').render({})
+
+    def payment_control_render(self, request, payment) -> str:
+        from .models import GiftCard
+
+        if 'gift_card' in payment.info_data:
+            gc = GiftCard.objects.get(pk=payment.info_data.get('gift_card'))
+            template = get_template('pretixcontrol/giftcards/payment.html')
+
+            ctx = {
+                'request': request,
+                'event': self.event,
+                'gc': gc,
+            }
+            return template.render(ctx)
+
+    def api_payment_details(self, payment: OrderPayment):
+        from .models import GiftCard
+        gc = GiftCard.objects.get(pk=payment.info_data.get('gift_card'))
+        return {
+            'gift_card': {
+                'id': gc.pk,
+                'secret': gc.secret,
+                'organizer': gc.issuer.slug
+            }
+        }
+
+    def payment_partial_refund_supported(self, payment: OrderPayment) -> bool:
+        return True
+
+    def payment_refund_supported(self, payment: OrderPayment) -> bool:
+        return True
+
+    def checkout_prepare(self, request: HttpRequest, cart: Dict[str, Any]) -> Union[bool, str, None]:
+        for p in get_cart(request):
+            if p.item.issue_giftcard:
+                messages.error(request, _("You cannot pay with gift cards when buying a gift card."))
+                return
+
+        cs = cart_session(request)
+        try:
+            gc = self.event.organizer.accepted_gift_cards.get(
+                secret=request.POST.get("giftcard")
+            )
+            if gc.currency != self.event.currency:
+                messages.error(request, _("This gift card does not support this currency."))
+                return
+            if gc.testmode and not self.event.testmode:
+                messages.error(request, _("This gift card can only be used in test mode."))
+                return
+            if not gc.testmode and self.event.testmode:
+                messages.error(request, _("Only test gift cards can be used in test mode."))
+                return
+            if gc.value <= Decimal("0.00"):
+                messages.error(request, _("All credit on this gift card has been used."))
+                return
+            if 'gift_cards' not in cs:
+                cs['gift_cards'] = []
+            elif gc.pk in cs['gift_cards']:
+                messages.error(request, _("This gift card is already used for your payment."))
+                return
+            cs['gift_cards'] = cs['gift_cards'] + [gc.pk]
+
+            remainder = cart['total'] - gc.value
+            if remainder >= Decimal('0.00'):
+                del cs['payment']
+                messages.success(request, _("Your gift card has been applied, but {} still need to be paid. Please select a payment method.").format(
+                    money_filter(remainder, self.event.currency)
+                ))
+            else:
+                messages.success(request, _("Your gift card has been applied."))
+
+            kwargs = {'step': 'payment'}
+            if request.resolver_match and 'cart_namespace' in request.resolver_match.kwargs:
+                kwargs['cart_namespace'] = request.resolver_match.kwargs['cart_namespace']
+            return eventreverse(self.event, 'presale:event.checkout', kwargs=kwargs)
+        except GiftCard.DoesNotExist:
+            if self.event.vouchers.filter(code__iexact=request.POST.get("giftcard")).exists():
+                messages.warning(request, _("You entered a voucher instead of a gift card. Vouchers can only be entered on the first page of the shop below "
+                                            "the product selection."))
+            else:
+                messages.error(request, _("This gift card is not known."))
+        except GiftCard.MultipleObjectsReturned:
+            messages.error(request, _("This gift card can not be redeemed since its code is not unique. Please contact the organizer of this event."))
+
+    def payment_prepare(self, request: HttpRequest, payment: OrderPayment) -> Union[bool, str, None]:
+        for p in payment.order.positions.all():
+            if p.item.issue_giftcard:
+                messages.error(request, _("You cannot pay with gift cards when buying a gift card."))
+                return
+
+        try:
+            gc = self.event.organizer.accepted_gift_cards.get(
+                secret=request.POST.get("giftcard")
+            )
+            if gc.currency != self.event.currency:
+                messages.error(request, _("This gift card does not support this currency."))
+                return
+            if gc.testmode and not payment.order.testmode:
+                messages.error(request, _("This gift card can only be used in test mode."))
+                return
+            if not gc.testmode and payment.order.testmode:
+                messages.error(request, _("Only test gift cards can be used in test mode."))
+                return
+            if gc.value <= Decimal("0.00"):
+                messages.error(request, _("All credit on this gift card has been used."))
+                return
+            payment.info_data = {
+                'gift_card': gc.pk,
+                'retry': True
+            }
+            payment.amount = min(payment.amount, gc.value)
+            payment.save()
+
+            return True
+        except GiftCard.DoesNotExist:
+            if self.event.vouchers.filter(code__iexact=request.POST.get("giftcard")).exists():
+                messages.warning(request, _("You entered a voucher instead of a gift card. Vouchers can only be entered on the first page of the shop below "
+                                            "the product selection."))
+            else:
+                messages.error(request, _("This gift card is not known."))
+        except GiftCard.MultipleObjectsReturned:
+            messages.error(request, _("This gift card can not be redeemed since its code is not unique. Please contact the organizer of this event."))
+
+    def execute_payment(self, request: HttpRequest, payment: OrderPayment) -> str:
+        # This method will only be called when retrying payments, e.g. after a payment_prepare call. It is not called
+        # during the order creation phase because this payment provider is a special case.
+        for p in payment.order.positions.all():  # noqa - just a safeguard
+            if p.item.issue_giftcard:
+                raise PaymentException(_("You cannot pay with gift cards when buying a gift card."))
+
+        gcpk = payment.info_data.get('gift_card')
+        if not gcpk or not payment.info_data.get('retry'):
+            raise PaymentException("Invalid state, should never occur.")
+        with transaction.atomic():
+            gc = GiftCard.objects.select_for_update().get(pk=gcpk)
+            if gc.currency != self.event.currency:  # noqa - just a safeguard
+                raise PaymentException(_("This gift card does not support this currency."))
+            if not gc.accepted_by(self.event.organizer):  # noqa - just a safeguard
+                raise PaymentException(_("This gift card is not accepted by this event organizer."))
+            if payment.amount > gc.value:  # noqa - just a safeguard
+                raise PaymentException(_("This gift card was used in the meantime. Please try again"))
+            trans = gc.transactions.create(
+                value=-1 * payment.amount,
+                order=payment.order,
+                payment=payment
+            )
+            payment.info_data = {
+                'gift_card': gc.pk,
+                'transaction_id': trans.pk,
+            }
+            payment.confirm()
+
+    def payment_is_valid_session(self, request: HttpRequest) -> bool:
+        return True
+
+    @transaction.atomic()
+    def execute_refund(self, refund: OrderRefund):
+        from .models import GiftCard
+        gc = GiftCard.objects.get(pk=refund.payment.info_data.get('gift_card'))
+        trans = gc.transactions.create(
+            value=refund.amount,
+            order=refund.order,
+            refund=refund
+        )
+        refund.info_data = {
+            'gift_card': gc.pk,
+            'transaction_id': trans.pk,
+        }
+        refund.done()
+
+
 @receiver(register_payment_providers, dispatch_uid="payment_free")
 def register_payment_provider(sender, **kwargs):
-    return [FreeOrderProvider, BoxOfficeProvider, OffsettingProvider, ManualPayment]
+    return [FreeOrderProvider, BoxOfficeProvider, OffsettingProvider, ManualPayment, GiftCardPayment]

src/pretix/base/pdf.py

@@ -14,6 +14,7 @@ from django.conf import settings
 from django.contrib.staticfiles import finders
 from django.dispatch import receiver
 from django.utils.formats import date_format
+from django.utils.html import escape
 from django.utils.timezone import now
 from django.utils.translation import ugettext_lazy as _
 from PyPDF2 import PdfFileReader
@@ -32,7 +33,7 @@ from reportlab.pdfgen.canvas import Canvas
 from reportlab.platypus import Paragraph
 
 from pretix.base.invoice import ThumbnailingImageReader
-from pretix.base.models import Order, OrderPosition, QuestionAnswer
+from pretix.base.models import Order, OrderPosition
 from pretix.base.settings import PERSON_NAME_SCHEMES
 from pretix.base.signals import layout_text_variables
 from pretix.base.templatetags.money import money_filter
@@ -52,35 +53,40 @@ DEFAULT_VARIABLES = OrderedDict((
         "editor_sample": "A1B2C",
         "evaluate": lambda orderposition, order, event: orderposition.order.code
     }),
+    ("positionid", {
+        "label": _("Order position number"),
+        "editor_sample": "1",
+        "evaluate": lambda orderposition, order, event: str(orderposition.positionid)
+    }),
     ("item", {
         "label": _("Product name"),
         "editor_sample": _("Sample product"),
-        "evaluate": lambda orderposition, order, event: str(orderposition.item.name)
+        "evaluate": lambda orderposition, order, event: escape(str(orderposition.item.name))
     }),
     ("variation", {
         "label": _("Variation name"),
         "editor_sample": _("Sample variation"),
-        "evaluate": lambda op, order, event: str(op.variation) if op.variation else ''
+        "evaluate": lambda op, order, event: escape(str(op.variation) if op.variation else '')
     }),
     ("item_description", {
         "label": _("Product description"),
         "editor_sample": _("Sample product description"),
-        "evaluate": lambda orderposition, order, event: str(orderposition.item.description)
+        "evaluate": lambda orderposition, order, event: escape(str(orderposition.item.description))
     }),
     ("itemvar", {
         "label": _("Product name and variation"),
         "editor_sample": _("Sample product – sample variation"),
-        "evaluate": lambda orderposition, order, event: (
+        "evaluate": lambda orderposition, order, event: escape((
             '{} - {}'.format(orderposition.item.name, orderposition.variation)
             if orderposition.variation else str(orderposition.item.name)
-        )
+        ))
     }),
     ("item_category", {
         "label": _("Product category"),
         "editor_sample": _("Ticket category"),
-        "evaluate": lambda orderposition, order, event: (
+        "evaluate": lambda orderposition, order, event: escape((
             str(orderposition.item.category.name) if orderposition.item.category else ""
-        )
+        ))
     }),
     ("price", {
         "label": _("Price"),
@@ -99,12 +105,12 @@ DEFAULT_VARIABLES = OrderedDict((
     ("attendee_name", {
         "label": _("Attendee name"),
         "editor_sample": _("John Doe"),
-        "evaluate": lambda op, order, ev: op.attendee_name or (op.addon_to.attendee_name if op.addon_to else '')
+        "evaluate": lambda op, order, ev: escape(op.attendee_name or (op.addon_to.attendee_name if op.addon_to else ''))
     }),
     ("event_name", {
         "label": _("Event name"),
         "editor_sample": _("Sample event name"),
-        "evaluate": lambda op, order, ev: str(ev.name)
+        "evaluate": lambda op, order, ev: escape(str(ev.name))
     }),
     ("event_date", {
         "label": _("Event date"),
@@ -185,12 +191,12 @@ DEFAULT_VARIABLES = OrderedDict((
     ("invoice_name", {
         "label": _("Invoice address name"),
         "editor_sample": _("John Doe"),
-        "evaluate": lambda op, order, ev: order.invoice_address.name if getattr(order, 'invoice_address', None) else ''
+        "evaluate": lambda op, order, ev: escape(order.invoice_address.name if getattr(order, 'invoice_address', None) else '')
     }),
     ("invoice_company", {
         "label": _("Invoice address company"),
         "editor_sample": _("Sample company"),
-        "evaluate": lambda op, order, ev: order.invoice_address.company if getattr(order, 'invoice_address', None) else ''
+        "evaluate": lambda op, order, ev: escape(order.invoice_address.company if getattr(order, 'invoice_address', None) else '')
     }),
     ("addons", {
         "label": _("List of Add-Ons"),
@@ -207,7 +213,7 @@ DEFAULT_VARIABLES = OrderedDict((
     ("organizer", {
         "label": _("Organizer name"),
         "editor_sample": _("Event organizer company"),
-        "evaluate": lambda op, order, ev: str(order.event.organizer.name)
+        "evaluate": lambda op, order, ev: escape(str(order.event.organizer.name))
     }),
     ("organizer_info_text", {
         "label": _("Organizer info text"),
@@ -241,12 +247,14 @@ DEFAULT_VARIABLES = OrderedDict((
     ("seat", {
         "label": _("Seat: Full name"),
         "editor_sample": _("Ground floor, Row 3, Seat 4"),
-        "evaluate": lambda op, order, ev: str(op.seat if op.seat else _('General admission'))
+        "evaluate": lambda op, order, ev: str(op.seat if op.seat else
+                                              _('General admission') if ev.seating_plan_id is not None else "")
     }),
     ("seat_zone", {
         "label": _("Seat: zone"),
         "editor_sample": _("Ground floor"),
-        "evaluate": lambda op, order, ev: str(op.seat.zone_name if op.seat else _('General admission'))
+        "evaluate": lambda op, order, ev: str(op.seat.zone_name if op.seat else
+                                              _('General admission') if ev.seating_plan_id is not None else "")
     }),
     ("seat_row", {
         "label": _("Seat: row"),
@@ -264,16 +272,28 @@ DEFAULT_VARIABLES = OrderedDict((
 @receiver(layout_text_variables, dispatch_uid="pretix_base_layout_text_variables_questions")
 def variables_from_questions(sender, *args, **kwargs):
     def get_answer(op, order, event, question_id):
-        try:
-            if 'answers' in getattr(op, '_prefetched_objects_cache', {}):
-                a = [a for a in op.answers.all() if a.question_id == question_id][0]
+        a = None
+        if op.addon_to:
+            if 'answers' in getattr(op.addon_to, '_prefetched_objects_cache', {}):
+                try:
+                    a = [a for a in op.addon_to.answers.all() if a.question_id == question_id][0]
+                except IndexError:
+                    pass
             else:
-                a = op.answers.get(question_id=question_id)
-            return str(a).replace("\n", "<br/>\n")
-        except QuestionAnswer.DoesNotExist:
-            return ""
-        except IndexError:
+                a = op.addon_to.answers.filter(question_id=question_id).first()
+
+        if 'answers' in getattr(op, '_prefetched_objects_cache', {}):
+            try:
+                a = [a for a in op.answers.all() if a.question_id == question_id][0]
+            except IndexError:
+                pass
+        else:
+            a = op.answers.filter(question_id=question_id).first()
+
+        if not a:
             return ""
+        else:
+            return escape(str(a)).replace("\n", "<br/>\n")
 
     d = {}
     for q in sender.questions.all():
@@ -286,11 +306,11 @@ def variables_from_questions(sender, *args, **kwargs):
 
 
 def _get_attendee_name_part(key, op, order, ev):
-    return op.attendee_name_parts.get(key, '')
+    return escape(op.attendee_name_parts.get(key, ''))
 
 
 def _get_ia_name_part(key, op, order, ev):
-    return order.invoice_address.name_parts.get(key, '') if getattr(order, 'invoice_address', None) else ''
+    return escape(order.invoice_address.name_parts.get(key, '') if getattr(order, 'invoice_address', None) else '')
 
 
 def get_variables(event):

src/pretix/base/services/cart.py

@@ -97,6 +97,7 @@ error_messages = {
     'seat_forbidden': _('You can not select a seat for this position.'),
     'seat_unavailable': _('The seat you selected has already been taken. Please select a different seat.'),
     'seat_multiple': _('You can not select the same seat multiple times.'),
+    'gift_card': _("You entered a gift card instead of a voucher. Gift cards can be entered later on when you're asked for your payment details."),
 }
 
 
@@ -226,11 +227,15 @@ class CartManager:
 
     def _check_item_constraints(self, op):
         if isinstance(op, self.AddOperation) or isinstance(op, self.ExtendOperation):
-            if op.item.require_voucher and op.voucher is None:
-                raise CartError(error_messages['voucher_required'])
+            if not (
+                (isinstance(op, self.AddOperation) and op.addon_to == 'FAKE') or
+                (isinstance(op, self.ExtendOperation) and op.position.is_bundled)
+            ):
+                if op.item.require_voucher and op.voucher is None:
+                    raise CartError(error_messages['voucher_required'])
 
-            if op.item.hide_without_voucher and (op.voucher is None or not op.voucher.show_hidden_items):
-                raise CartError(error_messages['voucher_required'])
+                if op.item.hide_without_voucher and (op.voucher is None or not op.voucher.show_hidden_items):
+                    raise CartError(error_messages['voucher_required'])
 
             if not op.item.is_available() or (op.variation and not op.variation.active):
                 raise CartError(error_messages['unavailable'])
@@ -432,6 +437,8 @@ class CartManager:
                     seat = (subevent or self.event).seats.get(seat_guid=i.get('seat'))
                 except Seat.DoesNotExist:
                     raise CartError(error_messages['seat_invalid'])
+                except Seat.MultipleObjectsReturned:
+                    raise CartError(error_messages['seat_invalid'])
                 i['item'] = seat.product_id
                 if i['item'] not in self._items_cache:
                     self._update_items_cache([i['item']], [i['variation']])
@@ -612,7 +619,7 @@ class CartManager:
 
                 op = self.AddOperation(
                     count=1, item=item, variation=variation, price=price, voucher=None, quotas=quotas,
-                    addon_to=cp, subevent=cp.subevent, includes_tax=bool(price.rate), bundled=[], seat=cp.seat
+                    addon_to=cp, subevent=cp.subevent, includes_tax=bool(price.rate), bundled=[], seat=None
                 )
                 self._check_item_constraints(op)
                 operations.append(op)
@@ -791,8 +798,9 @@ class CartManager:
                     for b in op.bundled:
                         b_quotas = list(b.quotas)
                         if not b_quotas:
-                            err = err or error_messages['unavailable']
-                            available_count = 0
+                            if not op.voucher or not op.voucher.allow_ignore_quota:
+                                err = err or error_messages['unavailable']
+                                available_count = 0
                             continue
                         b_quota_available_count = min(available_count * b.count, min(quotas_ok[q] for q in b_quotas))
                         if b_quota_available_count < b.count:
@@ -950,15 +958,42 @@ def update_tax_rates(event: Event, cart_id: str, invoice_address: InvoiceAddress
     return totaldiff
 
 
-def get_fees(event, request, total, invoice_address, provider):
-    fees = []
+def get_fees(event, request, total, invoice_address, provider, positions):
+    from pretix.presale.views.cart import cart_session
 
+    fees = []
     for recv, resp in fee_calculation_for_cart.send(sender=event, request=request, invoice_address=invoice_address,
-                                                    total=total):
+                                                    total=total, positions=positions):
         if resp:
             fees += resp
 
     total = total + sum(f.value for f in fees)
+
+    cs = cart_session(request)
+    if cs.get('gift_cards'):
+        gcs = cs['gift_cards']
+        gc_qs = event.organizer.accepted_gift_cards.filter(pk__in=cs.get('gift_cards'), currency=event.currency)
+        summed = 0
+        for gc in gc_qs:
+            if gc.testmode != event.testmode:
+                gcs.remove(gc.pk)
+                continue
+            fval = Decimal(gc.value)  # TODO: don't require an extra query
+            fval = min(fval, total - summed)
+            if fval > 0:
+                total -= fval
+                summed += fval
+                fees.append(OrderFee(
+                    fee_type=OrderFee.FEE_TYPE_GIFTCARD,
+                    internal_type='giftcard',
+                    description=gc.secret,
+                    value=-1 * fval,
+                    tax_rate=Decimal('0.00'),
+                    tax_value=Decimal('0.00'),
+                    tax_rule=TaxRule.zero()
+                ))
+        cs['gift_cards'] = gcs
+
     if provider and total != 0:
         provider = event.get_payment_providers().get(provider)
         if provider:

src/pretix/base/services/checkin.py

@@ -1,11 +1,13 @@
 from django.db import transaction
 from django.db.models import Prefetch
+from django.dispatch import receiver
 from django.utils.timezone import now
 from django.utils.translation import ugettext as _
 
 from pretix.base.models import (
     Checkin, CheckinList, Order, OrderPosition, Question, QuestionOption,
 )
+from pretix.base.signals import order_placed
 
 
 class CheckInError(Exception):
@@ -155,3 +157,18 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
             'datetime': dt,
             'list': clist.pk
         }, user=user, auth=auth)
+
+
+@receiver(order_placed, dispatch_uid="autocheckin_order_placed")
+def order_placed(sender, **kwargs):
+    order = kwargs['order']
+    event = sender
+
+    cls = list(event.checkin_lists.filter(auto_checkin_sales_channels__contains=order.sales_channel).prefetch_related(
+        'limit_products'))
+    if not cls:
+        return
+    for op in order.positions.all():
+        for cl in cls:
+            if cl.all_products or op.item_id in {i.pk for i in cl.limit_products.all()}:
+                Checkin.objects.create(position=op, list=cl, auto_checked_in=True)

src/pretix/base/services/invoices.py

@@ -20,9 +20,7 @@ from django_scopes import scope, scopes_disabled
 from i18nfield.strings import LazyI18nString
 
 from pretix.base.i18n import language
-from pretix.base.models import (
-    Invoice, InvoiceAddress, InvoiceLine, Order, OrderPayment,
-)
+from pretix.base.models import Invoice, InvoiceAddress, InvoiceLine, Order
 from pretix.base.models.tax import EU_CURRENCIES
 from pretix.base.services.tasks import TransactionAwareTask
 from pretix.base.settings import GlobalSettingsObject
@@ -37,9 +35,6 @@ logger = logging.getLogger(__name__)
 @transaction.atomic
 def build_invoice(invoice: Invoice) -> Invoice:
     lp = invoice.order.payments.last()
-    open_payment = None
-    if lp and lp.state not in (OrderPayment.PAYMENT_STATE_CONFIRMED, OrderPayment.PAYMENT_STATE_REFUNDED):
-        open_payment = lp
 
     with language(invoice.locale):
         invoice.invoice_from = invoice.event.settings.get('invoice_address_from')
@@ -53,13 +48,11 @@ def build_invoice(invoice: Invoice) -> Invoice:
         introductory = invoice.event.settings.get('invoice_introductory_text', as_type=LazyI18nString)
         additional = invoice.event.settings.get('invoice_additional_text', as_type=LazyI18nString)
         footer = invoice.event.settings.get('invoice_footer_text', as_type=LazyI18nString)
-        if open_payment and open_payment.payment_provider:
-            if 'payment' in inspect.signature(open_payment.payment_provider.render_invoice_text).parameters:
-                payment = open_payment.payment_provider.render_invoice_text(invoice.order, open_payment)
+        if lp and lp.payment_provider:
+            if 'payment' in inspect.signature(lp.payment_provider.render_invoice_text).parameters:
+                payment = lp.payment_provider.render_invoice_text(invoice.order, lp)
             else:
-                payment = open_payment.payment_provider.render_invoice_text(invoice.order)
-        elif invoice.order.status == Order.STATUS_PAID:
-            payment = pgettext('invoice', 'The payment for this invoice has already been received.')
+                payment = lp.payment_provider.render_invoice_text(invoice.order)
         else:
             payment = ""
 
@@ -73,12 +66,15 @@ def build_invoice(invoice: Invoice) -> Invoice:
             addr_template = pgettext("invoice", """{i.company}
 {i.name}
 {i.street}
-{i.zipcode} {i.city}
+{i.zipcode} {i.city} {state}
 {country}""")
-            invoice.invoice_to = addr_template.format(
-                i=ia,
-                country=ia.country.name if ia.country else ia.country_old
-            ).strip()
+            invoice.invoice_to = "\n".join(
+                a.strip() for a in addr_template.format(
+                    i=ia,
+                    country=ia.country.name if ia.country else ia.country_old,
+                    state=ia.state_for_address
+                ).split("\n") if a.strip()
+            )
             invoice.internal_reference = ia.internal_reference
             invoice.invoice_to_company = ia.company
             invoice.invoice_to_name = ia.name
@@ -86,6 +82,7 @@ def build_invoice(invoice: Invoice) -> Invoice:
             invoice.invoice_to_zipcode = ia.zipcode
             invoice.invoice_to_city = ia.city
             invoice.invoice_to_country = ia.country
+            invoice.invoice_to_state = ia.state
             invoice.invoice_to_beneficiary = ia.beneficiary
 
             if ia.vat_id:
@@ -125,7 +122,7 @@ def build_invoice(invoice: Invoice) -> Invoice:
         positions = list(
             invoice.order.positions.select_related('addon_to', 'item', 'tax_rule', 'subevent', 'variation').annotate(
                 addon_c=Count('addons')
-            ).order_by('positionid', 'id')
+            ).prefetch_related('answers', 'answers__question').order_by('positionid', 'id')
         )
 
         reverse_charge = False
@@ -142,6 +139,16 @@ def build_invoice(invoice: Invoice) -> Invoice:
                 desc = "  + " + desc
             if invoice.event.settings.invoice_attendee_name and p.attendee_name:
                 desc += "<br />" + pgettext("invoice", "Attendee: {name}").format(name=p.attendee_name)
+
+            for answ in p.answers.all():
+                if not answ.question.print_on_invoice:
+                    continue
+                desc += "<br />{}{} {}".format(
+                    answ.question.question,
+                    "" if str(answ.question.question).endswith("?") else ":",
+                    str(answ)
+                )
+
             if invoice.event.has_subevents:
                 desc += "<br />" + pgettext("subevent", "Date: {}").format(p.subevent)
             InvoiceLine.objects.create(
@@ -196,6 +203,8 @@ def build_cancellation(invoice: Invoice):
 
 
 def generate_cancellation(invoice: Invoice, trigger_pdf=True):
+    if invoice.refered.exists():
+        raise ValueError("Invoice should not be canceled twice.")
     cancellation = modelcopy(invoice)
     cancellation.pk = None
     cancellation.invoice_no = None

src/pretix/base/services/mail.py

@@ -4,7 +4,6 @@ import os
 import re
 import smtplib
 import warnings
-from email.encoders import encode_noop
 from email.mime.image import MIMEImage
 from email.utils import formataddr
 from typing import Any, Dict, List, Union
@@ -24,14 +23,15 @@ from i18nfield.strings import LazyI18nString
 from pretix.base.email import ClassicMailRenderer
 from pretix.base.i18n import language
 from pretix.base.models import (
-    Event, Invoice, InvoiceAddress, Order, OrderPosition,
+    Event, Invoice, InvoiceAddress, Order, OrderPosition, User,
 )
 from pretix.base.services.invoices import invoice_pdf_task
 from pretix.base.services.tasks import TransactionAwareTask
 from pretix.base.services.tickets import get_tickets_for_order
-from pretix.base.signals import email_filter
+from pretix.base.signals import email_filter, global_email_filter
 from pretix.celery_app import app
 from pretix.multidomain.urlreverse import build_absolute_uri
+from pretix.presale.ical import get_ical
 
 logger = logging.getLogger('pretix.base.mail')
 INVALID_ADDRESS = 'invalid-pretix-mail-address'
@@ -51,7 +51,7 @@ class SendMailException(Exception):
 def mail(email: str, subject: str, template: Union[str, LazyI18nString],
          context: Dict[str, Any]=None, event: Event=None, locale: str=None,
          order: Order=None, position: OrderPosition=None, headers: dict=None, sender: str=None,
-         invoices: list=None, attach_tickets=False):
+         invoices: list=None, attach_tickets=False, auto_email=True, user=None, attach_ical=False):
     """
     Sends out an email to a user. The mail will be sent synchronously or asynchronously depending on the installation.
 
@@ -86,6 +86,12 @@ def mail(email: str, subject: str, template: Union[str, LazyI18nString],
 
     :param attach_tickets: Whether to attach tickets to this email, if they are available to download.
 
+    :param attach_ical: Whether to attach relevant ``.ics`` files to this email
+
+    :param auto_email: Whether this email is auto-generated
+
+    :param user: The user this email is sent to
+
     :raises MailOrderException: on obvious, immediate failures. Not raising an exception does not necessarily mean
         that the email has been sent, just that it has been queued by the email backend.
     """
@@ -93,6 +99,9 @@ def mail(email: str, subject: str, template: Union[str, LazyI18nString],
         return
 
     headers = headers or {}
+    if auto_email:
+        headers['X-Auto-Response-Suppress'] = 'OOF, NRN, AutoReply, RN'
+        headers['Auto-Submitted'] = 'auto-generated'
 
     with language(locale):
         if isinstance(context, dict) and event:
@@ -112,7 +121,7 @@ def mail(email: str, subject: str, template: Union[str, LazyI18nString],
                 })
         renderer = ClassicMailRenderer(None)
         content_plain = body_plain = render_mail(template, context)
-        subject = str(subject).format_map(context)
+        subject = str(subject).format_map(TolerantDict(context))
         sender = sender or (event.settings.get('mail_from') if event else settings.MAIL_FROM)
         if event:
             sender_name = event.settings.mail_from_name or str(event.name)
@@ -209,7 +218,9 @@ def mail(email: str, subject: str, template: Union[str, LazyI18nString],
             invoices=[i.pk for i in invoices] if invoices and not position else [],
             order=order.pk if order else None,
             position=position.pk if position else None,
-            attach_tickets=attach_tickets
+            attach_tickets=attach_tickets,
+            attach_ical=attach_ical,
+            user=user.pk if user else None
         )
 
         if invoices:
@@ -224,13 +235,17 @@ def mail(email: str, subject: str, template: Union[str, LazyI18nString],
 @app.task(base=TransactionAwareTask, bind=True)
 def mail_send_task(self, *args, to: List[str], subject: str, body: str, html: str, sender: str,
                    event: int=None, position: int=None, headers: dict=None, bcc: List[str]=None,
-                   invoices: List[int]=None, order: int=None, attach_tickets=False) -> bool:
+                   invoices: List[int]=None, order: int=None, attach_tickets=False, user=None,
+                   attach_ical=False) -> bool:
     email = EmailMultiAlternatives(subject, body, sender, to=to, bcc=bcc, headers=headers)
     if html is not None:
         html_with_cid, cid_images = replace_images_with_cid_paths(html)
         email = attach_cid_images(email, cid_images, verify_ssl=True)
         email.attach_alternative(html_with_cid, "text/html")
 
+    if user:
+        user = User.objects.get(pk=user)
+
     if event:
         with scopes_disabled():
             event = Event.objects.get(id=event)
@@ -291,8 +306,24 @@ def mail_send_task(self, *args, to: List[str], subject: str, body: str, html: st
                                     'invoices': [],
                                 }
                             )
+                    if attach_ical:
+                        ical_events = set()
+                        if event.has_subevents:
+                            if position:
+                                ical_events.add(position.subevent)
+                            else:
+                                for p in order.positions.all():
+                                    ical_events.add(p.subevent)
+                        else:
+                            ical_events.add(order.event)
 
-            email = email_filter.send_chained(event, 'message', message=email, order=order)
+                        for i, e in enumerate(ical_events):
+                            cal = get_ical([e])
+                            email.attach('event-{}.ics'.format(i), cal.serialize(), 'text/calendar')
+
+            email = email_filter.send_chained(event, 'message', message=email, order=order, user=user)
+
+        email = global_email_filter.send_chained(event, 'message', message=email, user=user, order=order)
 
         try:
             backend.send_messages([email])
@@ -366,7 +397,7 @@ def replace_images_with_cid_paths(body_html):
 def attach_cid_images(msg, cid_images, verify_ssl=True):
     if cid_images and len(cid_images) > 0:
 
-        msg.mixed_subtype = 'related'
+        msg.mixed_subtype = 'mixed'
         for key, image in enumerate(cid_images):
             cid = 'image_%s' % key
             try:
@@ -380,12 +411,27 @@ def attach_cid_images(msg, cid_images, verify_ssl=True):
     return msg
 
 
+def encoder_linelength(msg):
+    """
+    RFC1341 mandates that base64 encoded data may not be longer than 76 characters per line
+    https://www.w3.org/Protocols/rfc1341/5_Content-Transfer-Encoding.html section 5.2
+    """
+
+    orig = msg.get_payload(decode=True).replace(b"\n", b"").replace(b"\r", b"")
+    max_length = 76
+    pieces = []
+    for i in range(0, len(orig), max_length):
+        chunk = orig[i:i + max_length]
+        pieces.append(chunk)
+    msg.set_payload(b"\r\n".join(pieces))
+
+
 def convert_image_to_cid(image_src, cid_id, verify_ssl=True):
     try:
         if image_src.startswith('data:image/'):
             image_type, image_content = image_src.split(',', 1)
             image_type = re.findall(r'data:image/(\w+);base64', image_type)[0]
-            mime_image = MIMEImage(image_content, _subtype=image_type, _encoder=encode_noop)
+            mime_image = MIMEImage(image_content, _subtype=image_type, _encoder=encoder_linelength)
             mime_image.add_header('Content-Transfer-Encoding', 'base64')
         elif image_src.startswith('data:'):
             logger.exception("ERROR creating MIME element %s[%s]" % (cid_id, image_src))

src/pretix/base/services/notifications.py

@@ -120,4 +120,5 @@ def send_notification_mail(notification: Notification, user: User):
         'html': body_html,
         'sender': settings.MAIL_FROM,
         'headers': {},
+        'user': user.pk
     })