Bump version to 1.16.0

Update from Weblate.

.travis.sh

@@ -25,7 +25,7 @@ if [ "$1" == "doctests" ]; then
 	cd doc
 	make doctest
 fi
-if [ "$1" == "spelling" ]; then
+if [ "$1" == "doc-spelling" ]; then
 	XDG_CACHE_HOME=/cache pip3 install -Ur doc/requirements.txt
 	cd doc
 	make spelling
@@ -33,12 +33,17 @@ if [ "$1" == "spelling" ]; then
 		exit 1
 	fi
 fi
+if [ "$1" == "translation-spelling" ]; then
+	XDG_CACHE_HOME=/cache pip3 install -Ur src/requirements/dev.txt
+	cd src
+	potypo
+fi
 if [ "$1" == "tests" ]; then
-	pip3 install -r src/requirements.txt -Ur src/requirements/dev.txt -r src/requirements/py34.txt
+	pip3 install -r src/requirements.txt -Ur src/requirements/dev.txt -r src/requirements/py34.txt pytest-xdist
 	cd src
 	python manage.py check
 	make all compress
-	py.test --reruns 5 tests
+	py.test --reruns 5 -n 2 tests
 fi
 if [ "$1" == "tests-cov" ]; then
 	pip3 install -r src/requirements.txt -Ur src/requirements/dev.txt -r src/requirements/py34.txt

.travis.yml

@@ -15,7 +15,7 @@ matrix:
     - python: 3.6
       env: JOB=tests PRETIX_CONFIG_FILE=tests/travis_sqlite.cfg
     - python: 3.6
-      env: JOB=tests-cov
+      env: JOB=tests-cov PRETIX_CONFIG_FILE=tests/travis_postgres.cfg
     - python: 3.6
       env: JOB=style
     - python: 3.4
@@ -37,12 +37,16 @@ matrix:
     - python: 3.6
       env: JOB=plugins
     - python: 3.6
-      env: JOB=spelling
+      env: JOB=doc-spelling
+    - python: 3.6
+      env: JOB=translation-spelling
 addons:
   postgresql: "9.4"
   apt:
       packages:
           - enchant
+          - myspell-de-de
+          - aspell-en
 branches:
   except:
   - /^weblate-.*/

Dockerfile

@@ -3,7 +3,7 @@ FROM python:3.6
 RUN apt-get update && \
     apt-get install -y git libxml2-dev libxslt1-dev python-dev python-virtualenv locales \
       libffi-dev build-essential python3-dev zlib1g-dev libssl-dev gettext libpq-dev \
-      libmysqlclient-dev libmemcached-dev libjpeg-dev supervisor nginx sudo \
+      default-libmysqlclient-dev libmemcached-dev libjpeg-dev supervisor nginx sudo \
 	  --no-install-recommends && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/* && \

deployment/docker/pretix.bash

@@ -3,7 +3,7 @@ cd /pretix/src
 export DJANGO_SETTINGS_MODULE=production_settings
 export DATA_DIR=/data/
 export HOME=/pretix
-NUM_WORKERS=10
+export NUM_WORKERS=$((2 * $(nproc --all)))
 
 if [ ! -d /data/logs ]; then
     mkdir /data/logs;

doc/api/fundamentals.rst

@@ -6,27 +6,13 @@ with pretix' REST API, such as authentication, pagination and similar definition
 
 .. _`rest-auth`:
 
-Obtaining an API token
-----------------------
-
-To authenticate your API requests, you need to obtain an API token. You can create a
-token in the pretix web interface on the level of organizer teams. Create a new team
-or choose an existing team that has the level of permissions the token should have and
-create a new token using the form below the list of team members:
-
-.. image:: img/token_form.png
-   :class: screenshot
-
-You can enter a description for the token to distinguish from other tokens later on.
-Once you click "Add", you will be provided with an API token in the success message.
-Copy this token, as you won't be able to retrieve it again.
-
-.. image:: img/token_success.png
-   :class: screenshot
-
 Authentication
 --------------
 
+If you're building an application for end users, we strongly recommend that you use our
+:ref:`OAuth-based authentication progress <rest-oauth>`. However, for simpler needs, you
+can also go with static API tokens that you can create on a per-team basis (see below).
+
 You need to include the API token with every request to pretix' API in the ``Authorization`` header
 like the following:
 
@@ -44,6 +30,24 @@ like the following:
           adding OAuth2 support in the future for user-level authentication. If you want
           to use session authentication, be sure to comply with Django's `CSRF policies`_.
 
+Obtaining an API token
+----------------------
+
+To authenticate your API requests, you need to obtain an API token. You can create a
+token in the pretix web interface on the level of organizer teams. Create a new team
+or choose an existing team that has the level of permissions the token should have and
+create a new token using the form below the list of team members:
+
+.. image:: img/token_form.png
+    :class: screenshot
+
+You can enter a description for the token to distinguish from other tokens later on.
+Once you click "Add", you will be provided with an API token in the success message.
+Copy this token, as you won't be able to retrieve it again.
+
+.. image:: img/token_success.png
+    :class: screenshot
+
 Permissions
 -----------
 
@@ -109,6 +113,41 @@ respective page.
 The field ``results`` contains a list of objects representing the first results. For most
 objects, every page contains 50 results.
 
+Conditional fetching
+--------------------
+
+If you pull object lists from pretix' APIs regularly, we ask you to implement conditional fetching
+to avoid unnecessary data traffic. This is not supported on all resources and we currently implement
+two different mechanisms for different resources, which is necessary because we can only obtain best
+efficiency for resources that do not support deletion operations.
+
+Object-level conditional fetching
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The :ref:`rest-orders` resource list contains an HTTP header called ``X-Page-Generated`` containing the
+current time on the server in ISO 8601 format. On your next request, you can pass this header
+(as is, without any modifications necessary) as the ``modified_since`` query parameter and you will receive
+a list containing only objects that have changed in the time since your last request.
+
+List-level conditional fetching
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+If modification checks are not possible with this granularity, you can instead check for the full list.
+In this case, the list of objects may contain a regular HTTP header ``Last-Modified`` with the date of the
+last modification to any item of that resource. You can then pass this date back in your next request in the
+``If-Modified-Since`` header. If the any object has changed in the meantime, you will receive back a full list
+(if something it missing, this means the object has been deleted). If nothing happened, we'll send back a
+``304 Not Modified`` return code.
+
+This is currently implemented on the following resources:
+
+* :ref:`rest-categories`
+* :ref:`rest-items`
+* :ref:`rest-questions`
+* :ref:`rest-quotas`
+* :ref:`rest-subevents`
+* :ref:`rest-taxrules`
+
 Errors
 ------
 

doc/api/index.rst

@@ -14,4 +14,5 @@ in functionality over time.
    :maxdepth: 2
 
    fundamentals
+   oauth
    resources/index

doc/api/oauth.rst

@@ -0,0 +1,171 @@
+.. _`rest-oauth`:
+
+OAuth support / "Connect with pretix"
+=====================================
+
+In addition to static tokens, pretix supports `OAuth2`_-based authentication starting with
+pretix 1.16. This allows you to put a "Connect with pretix" button into your website or tool
+that allows the user to easily set up a connection between the two systems.
+
+If you haven't worked with OAuth before, have a look at the `OAuth2 Simplified`_ tutorial.
+
+Registering an application
+--------------------------
+
+To use OAuth, you need to register your application with the pretix instance you want to connect to.
+In order to do this, log in to your pretix account and go to your user settings. Click on "Authorized applications"
+first and then on "Manage your own apps". From there, you can "Create a new application".
+
+You should fill in a descriptive name of your application that allows users to recognize who you are. You also need to
+give a list of fully-qualified URLs that users will be redirected to after a successful authorization. After you pressed
+"Save", you will be presented with a client ID and a client secret. Please note them down and treat the client secret
+like a password; it should not become available to your users.
+
+Obtaining an authorization grant
+--------------------------------
+
+To authorize a new user, link or redirect them to the ``authorize`` endpoint, passing your client ID as a query
+parameter. Additionally, you can pass a scope (currently either ``read``, ``write``, or ``read write``)
+and an URL the user should be redirected to after successful or failed authorization. You also need to pass the
+``response_type`` parameter with a value of ``code``. Example::
+
+    https://pretix.eu/api/v1/oauth/authorize?client_id=lsLi0hNL0vk53mEdYjNJxHUn1PcO1R6wVg81dLNT&response_type=code&scope=read+write&redirect_uri=https://pretalx.com
+
+To prevent CSRF attacks, you can also optionally pass a ``state`` parameter with a random string. Later, when
+redirecting back to your application, we will pass the same ``state`` parameter back to you, so you can compare if they
+match.
+
+After the user granted or denied access, they will be redirected back either to the ``redirect_url`` you passed in the
+query or to the first redirect URL configured in your application settings.
+
+On successful registration, we will append the query parameter ``code`` to the URL containing an authorization code.
+For example, we might redirect the user to this URL::
+
+    https://pretalx.com/?code=eYBBf8gmeD4E01HLoj0XflqO4Lg3Cw&state=e3KCh9mfx07qxU4bRpXk
+
+You will need this ``code`` parameter to perform the next step.
+
+On a failed registration, a query string like ``?error=access_denied`` will be appended to the redirection URL.
+
+.. note:: In this step, the user is allowed to restrict your access to certain organizer accounts. If you try to
+          re-authenticate the user later, the user might be instantly redirected back to you if authorization is already
+          given and would therefore be unable to review their organizer restriction settings. You can append the
+          ``approval_prompt=force`` query parameter if you want to make sure the user actively needs to confirm the
+          authorization.
+
+Getting an access token
+-----------------------
+
+Using the ``code`` value you obtained above and your client ID, you can now request an access token that actually gives
+access to the API. The ``token`` endpoint expects you to authenticate using `HTTP Basic authentication`_ using your client
+ID as a username and your client secret as a password. You are also required to again supply the same ``redirect_uri``
+parameter that you used for the authorization.
+
+.. http:get:: /api/v1/oauth/token
+
+   Request a new access token
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      POST /api/v1/oauth/token HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+      Authorization: Basic bHNMaTBoTkwwdms1M21FZFlqTkp4SFVuMVBjTzFSNndWZzgxZExOVDplSmpzZVA0UjJMN0hMcjBiS0p1b3BmbnJtT2cyY3NDeTdYaFVVZ0FoalhUU0NhZHhRTjk3cVNvMkpPaXlWTFpQOEozaTVQd1FVdFIwNUNycG5ac2Z0bXJjdmNTbkZ1SkFmb2ZsUTdZUDRpSjZNTWFYTHIwQ0FpNlhIRFJjV1Awcg==
+
+      grant_type=authorization_code&code=eYBBf8gmeD4E01HLoj0XflqO4Lg3Cw&redirect_uri=https://pretalx.com
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "access_token": "i3ytqTSRWsKp16fqjekHXa4tdM4qNC",
+        "expires_in": 86400,
+        "token_type": "Bearer",
+        "scope": "read write",
+        "refresh_token": "XBK0r8z4A4TTeR9LyMUyU2AM5rqpXp"
+      }
+
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+
+
+As you can see, you receive two types of tokens: One "access token", and one "refresh token". The access token is valid
+for a day and can be used to actually access the API. The refresh token does not have an expiration date and can be used
+to obtain a new access_token after a day, so you should make sure to store the access token safely if you need long-term
+access.
+
+Using the API with an access token
+----------------------------------
+
+You can supply a valid access token as a ``Bearer``-type token in the ``Authorization`` header to get API access.
+
+.. sourcecode:: http
+   :emphasize-lines: 3
+
+       GET /api/v1/organizers/ HTTP/1.1
+       Host: pretix.eu
+       Authorization: Bearer i3ytqTSRWsKp16fqjekHXa4tdM4qNC
+
+Refreshing an access token
+--------------------------
+
+You can obtain a new access token using your refresh token any time. This can be done using the same ``token`` endpoint
+used to obtain the first access token above, but with a different set of parameters:
+
+.. sourcecode:: http
+
+  POST /api/v1/oauth/token HTTP/1.1
+  Host: pretix.eu
+  Accept: application/json, text/javascript
+  Authorization: Basic bHNMaTBoTkwwdms1M21FZFlqTkp4SFVuMVBjTzFSNndWZzgxZExOVDplSmpzZVA0UjJMN0hMcjBiS0p1b3BmbnJtT2cyY3NDeTdYaFVVZ0FoalhUU0NhZHhRTjk3cVNvMkpPaXlWTFpQOEozaTVQd1FVdFIwNUNycG5ac2Z0bXJjdmNTbkZ1SkFmb2ZsUTdZUDRpSjZNTWFYTHIwQ0FpNlhIRFJjV1Awcg==
+
+  grant_type=refresh_token&refresh_token=XBK0r8z4A4TTeR9LyMUyU2AM5rqpXp
+
+The previous access token will instantly become invalid.
+
+Revoking a token
+----------------
+
+If you don't need a token any more or if you believe it may have been compromised, you can use the ``revoke_token``
+endpoint to revoke it.
+
+.. http:get:: /api/v1/oauth/revoke_token
+
+   Revoke an access or refresh token. If you revoke an access token, you can still create a new one using the refresh token. If you
+   revoke a refresh token, the connected access token  will also be revoked.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      POST /api/v1/oauth/revoke_token HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+      Authorization: Basic bHNMaTBoTkwwdms1M21FZFlqTkp4SFVuMVBjTzFSNndWZzgxZExOVDplSmpzZVA0UjJMN0hMcjBiS0p1b3BmbnJtT2cyY3NDeTdYaFVVZ0FoalhUU0NhZHhRTjk3cVNvMkpPaXlWTFpQOEozaTVQd1FVdFIwNUNycG5ac2Z0bXJjdmNTbkZ1SkFmb2ZsUTdZUDRpSjZNTWFYTHIwQ0FpNlhIRFJjV1Awcg==
+
+      token=XBK0r8z4A4TTeR9LyMUyU2AM5rqpXp
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+
+If you want to revoke your client secret, you can generate a new one in the list of your managed applications in the
+pretix user interface.
+
+.. _OAuth2: https://en.wikipedia.org/wiki/OAuth
+.. _OAuth2 Simplified: https://aaronparecki.com/oauth-2-simplified/
+.. _HTTP Basic authentication: https://en.wikipedia.org/wiki/Basic_access_authentication

doc/api/resources/categories.rst

@@ -1,3 +1,5 @@
+.. _`rest-categories`:
+
 Item categories
 ===============
 
@@ -14,6 +16,7 @@ Field                                 Type                       Description
 ===================================== ========================== =======================================================
 id                                    integer                    Internal ID of the category
 name                                  multi-lingual string       The category's visible name
+internal_name                         string                     An optional name that is only used in the backend
 description                           multi-lingual string       A public description (might include markdown, can
                                                                  be ``null``)
 position                              integer                    An integer, used for sorting the categories
@@ -26,6 +29,10 @@ is_addon                              boolean                    If ``True``, it
 
    The operations POST, PATCH, PUT and DELETE have been added.
 
+.. versionchanged:: 1.16
+
+   The field ``internal_name`` has been added.
+
 
 Endpoints
 ---------
@@ -58,6 +65,7 @@ Endpoints
           {
             "id": 1,
             "name": {"en": "Tickets"},
+            "internal_name": "",
             "description": {"en": "Tickets are what you need to get in."},
             "position": 1,
             "is_addon": false
@@ -99,6 +107,7 @@ Endpoints
       {
         "id": 1,
         "name": {"en": "Tickets"},
+        "internal_name": "",
         "description": {"en": "Tickets are what you need to get in."},
         "position": 1,
         "is_addon": false
@@ -126,6 +135,7 @@ Endpoints
 
       {
         "name": {"en": "Tickets"},
+        "internal_name": "",
         "description": {"en": "Tickets are what you need to get in."},
         "position": 1,
         "is_addon": false
@@ -142,6 +152,7 @@ Endpoints
       {
         "id": 1,
         "name": {"en": "Tickets"},
+        "internal_name": "",
         "description": {"en": "Tickets are what you need to get in."},
         "position": 1,
         "is_addon": false
@@ -187,6 +198,7 @@ Endpoints
       {
         "id": 1,
         "name": {"en": "Tickets"},
+        "internal_name": "",
         "description": {"en": "Tickets are what you need to get in."},
         "position": 1,
         "is_addon": true

doc/api/resources/checkinlists.rst

@@ -375,6 +375,7 @@ Order position endpoints
             "secret": "z3fsn8jyufm5kpk768q69gkbyr5f4h6w",
             "addon_to": null,
             "subevent": null,
+            "pseudonymization_id": "MQLJvANO3B",
             "checkins": [
               {
                 "list": 1,
@@ -467,6 +468,7 @@ Order position endpoints
         "secret": "z3fsn8jyufm5kpk768q69gkbyr5f4h6w",
         "addon_to": null,
         "subevent": null,
+        "pseudonymization_id": "MQLJvANO3B",
         "checkins": [
           {
             "list": 1,

doc/api/resources/items.rst

@@ -1,3 +1,5 @@
+.. _rest-items:
+
 Items
 =====
 
@@ -14,6 +16,7 @@ Field                                 Type                       Description
 ===================================== ========================== =======================================================
 id                                    integer                    Internal ID of the item
 name                                  multi-lingual string       The item's visible name
+internal_name                         string                     An optional name that is only used in the backend
 default_price                         money (string)             The item price that is applied if the price is not
                                                                  overwritten by variations or other options.
 category                              integer                    The ID of the category this item belongs to
@@ -54,11 +57,14 @@ max_per_order                         integer                    This product ca
 checkin_attention                     boolean                    If ``True``, the check-in app should show a warning
                                                                  that this ticket requires special attention if such
                                                                  a product is being scanned.
+original_price                        money (string)             An original price, shown for comparison, not used
+                                                                 for price calculations.
 has_variations                        boolean                    Shows whether or not this item has variations.
 variations                            list of objects            A list with one object for each variation of this item.
                                                                  Can be empty. Only writable during creation,
                                                                  use separate endpoint to modify this later.
 ├ id                                  integer                    Internal ID of the variation
+├ value                               multi-lingual string       The "name" of the variation
 ├ default_price                       money (string)             The price set directly for this variation or ``null``
 ├ price                               money (string)             The price used for this variation. This is either the
                                                                  same as ``default_price`` if that value is set or equal
@@ -88,6 +94,10 @@ addons                                list of objects            Definition of a
    The write operations ``POST``, ``PATCH``, ``PUT``, and ``DELETE`` have been added.
    The attribute ``price_included`` has been added to ``addons``.
 
+.. versionchanged:: 1.16
+
+   The field ``internal_name`` and ``original_price`` fields have been added.
+
 Notes
 -----
 Please note that an item either always has variations or never has. Once created with variations the item can never
@@ -129,7 +139,9 @@ Endpoints
           {
             "id": 1,
             "name": {"en": "Standard ticket"},
+            "internal_name": "",
             "default_price": "23.00",
+            "original_price": null,
             "category": null,
             "active": true,
             "description": null,
@@ -211,7 +223,9 @@ Endpoints
       {
         "id": 1,
         "name": {"en": "Standard ticket"},
+        "internal_name": "",
         "default_price": "23.00",
+        "original_price": null,
         "category": null,
         "active": true,
         "description": null,
@@ -274,7 +288,9 @@ Endpoints
       {
         "id": 1,
         "name": {"en": "Standard ticket"},
+        "internal_name": "",
         "default_price": "23.00",
+        "original_price": null,
         "category": null,
         "active": true,
         "description": null,
@@ -324,7 +340,9 @@ Endpoints
       {
         "id": 1,
         "name": {"en": "Standard ticket"},
+        "internal_name": "",
         "default_price": "23.00",
+        "original_price": null,
         "category": null,
         "active": true,
         "description": null,
@@ -406,7 +424,9 @@ Endpoints
       {
         "id": 1,
         "name": {"en": "Ticket"},
+        "internal_name": "",
         "default_price": "25.00",
+        "original_price": null,
         "category": null,
         "active": true,
         "description": null,

doc/api/resources/orders.rst

@@ -1,4 +1,10 @@
-.. spelling:: checkins
+.. spelling::
+
+   checkins
+   pdf
+
+
+.. _rest-orders:
 
 Orders
 ======
@@ -49,7 +55,7 @@ invoice_address                       object                     Invoice address
 └ vat_id_validated                    string                     ``True``, if the VAT ID has been validated against the
                                                                  EU VAT service and validation was successful. This only
                                                                  happens in rare cases.
-position                              list of objects            List of order positions (see below)
+positions                             list of objects            List of order positions (see below)
 fees                                  list of objects            List of fees included in the order total (i.e.
                                                                  payment fees)
 ├ fee_type                            string                     Type of fee (currently ``payment``, ``passbook``,
@@ -68,6 +74,7 @@ downloads                             list of objects            List of ticket
                                                                  download options.
 ├ output                              string                     Ticket output provider (e.g. ``pdf``, ``passbook``)
 └ url                                 string                     Download URL
+last_modified                         datetime                   Last modification of this object
 ===================================== ========================== =======================================================
 
 
@@ -96,6 +103,11 @@ downloads                             list of objects            List of ticket
    The attributes ``order.payment_fee``, ``order.payment_fee_tax_rate``, ``order.payment_fee_tax_value`` and
    ``order.payment_fee_tax_rule`` have finally been removed.
 
+.. versionchanged:: 1.16
+
+   The attributes ``order.last_modified`` as well as the corresponding filters to the resource have been added.
+   An endpoint for order creation as well as ``…/mark_refunded/`` has been added.
+
 .. _order-position-resource:
 
 Order position resource
@@ -107,7 +119,7 @@ Order position resource
 Field                                 Type                       Description
 ===================================== ========================== =======================================================
 id                                    integer                    Internal ID of the order position
-code                                  string                     Order code of the order the position belongs to
+order                                 string                     Order code of the order the position belongs to
 positionid                            integer                    Number of the position within the order
 item                                  integer                    ID of the purchased item
 variation                             integer                    ID of the purchased variation (or ``null``)
@@ -121,6 +133,7 @@ tax_rule                              integer                    The ID of the u
 secret                                string                     Secret code printed on the tickets for validation
 addon_to                              integer                    Internal ID of the position this position is an add-on for (or ``null``)
 subevent                              integer                    ID of the date inside an event series this position belongs to (or ``null``).
+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
@@ -133,6 +146,9 @@ answers                               list of objects            Answers to user
 ├ question_identifier                 string                     The question's ``identifier`` field
 ├ options                             list of integers           Internal IDs of selected option(s)s (only for choice types)
 └ option_identifiers                  list of strings            The ``identifier`` fields of the selected option(s)s
+pdf_data                              object                     Data object required for ticket PDF generation. By default,
+                                                                 this field is missing. It will be added only if you add the
+                                                                 ``pdf_data=true`` query parameter to your request.
 ===================================== ========================== =======================================================
 
 .. versionchanged:: 1.7
@@ -147,6 +163,10 @@ answers                               list of objects            Answers to user
 
   The attributes ``answers.question_identifier`` and ``answers.option_identifiers`` have been added.
 
+.. versionchanged:: 1.16
+
+  The attributes ``pseudonymization_id`` and ``pdf_data`` have been added.
+
 
 Order endpoints
 ---------------
@@ -174,6 +194,7 @@ Order endpoints
       HTTP/1.1 200 OK
       Vary: Accept
       Content-Type: application/json
+      X-Page-Generated: 2017-12-01T10:00:00Z
 
       {
         "count": 1,
@@ -188,6 +209,7 @@ Order endpoints
             "locale": "en",
             "datetime": "2017-12-01T10:00:00Z",
             "expires": "2017-12-10T10:00:00Z",
+            "last_modified": "2017-12-01T10:00:00Z",
             "payment_date": "2017-12-05",
             "payment_provider": "banktransfer",
             "fees": [],
@@ -224,6 +246,7 @@ Order endpoints
                 "secret": "z3fsn8jyufm5kpk768q69gkbyr5f4h6w",
                 "addon_to": null,
                 "subevent": null,
+                "pseudonymization_id": "MQLJvANO3B",
                 "checkins": [
                   {
                     "list": 44,
@@ -264,8 +287,11 @@ Order endpoints
    :query string status: Only return orders in the given order status (see above)
    :query string email: Only return orders created with the given email address
    :query string locale: Only return orders with the given customer locale
+   :query datetime modified_since: Only return orders that have changed since the given date
    :param organizer: The ``slug`` field of the organizer to fetch
    :param event: The ``slug`` field of the event to fetch
+   :resheader X-Page-Generated: The server time at the beginning of the operation. If you're using this API to fetch
+                                differences, this is the value you want to use as ``modified_since`` in your next call.
    :statuscode 200: no error
    :statuscode 401: Authentication failure
    :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view this resource.
@@ -298,6 +324,7 @@ Order endpoints
         "locale": "en",
         "datetime": "2017-12-01T10:00:00Z",
         "expires": "2017-12-10T10:00:00Z",
+        "last_modified": "2017-12-01T10:00:00Z",
         "payment_date": "2017-12-05",
         "payment_provider": "banktransfer",
         "fees": [],
@@ -334,6 +361,7 @@ Order endpoints
             "secret": "z3fsn8jyufm5kpk768q69gkbyr5f4h6w",
             "addon_to": null,
             "subevent": null,
+            "pseudonymization_id": "MQLJvANO3B",
             "checkins": [
               {
                 "list": 44,
@@ -414,6 +442,179 @@ Order endpoints
    :statuscode 409: The file is not yet ready and will now be prepared. Retry the request after waiting for a few
                           seconds.
 
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/orders/
+
+   Creates a new order.
+
+   .. warning:: This endpoint is considered **experimental**. It might change at any time without prior notice.
+
+   .. warning::
+
+       This endpoint is intended for advanced users. It is not designed to be used to build your own shop frontend,
+       it's rather intended to import attendees from external sources etc.
+       There is a lot that it does not or can not do, and you will need to be careful using it.
+       It allows to bypass many of the restrictions imposed when creating an order through the
+       regular shop.
+
+       Specifically, this endpoint currently
+
+       * does not validate if products are only to be sold in a specific time frame
+
+       * does not validate if the event's ticket sales are already over or haven't started
+
+       * 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 check or calculate prices but believes any prices you send
+
+       * does not support the redemption of vouchers
+
+       * does not prevent you from buying items that can only be bought with a voucher
+
+       * does not calculate fees
+
+       * 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
+
+   You can supply the following fields of the resource:
+
+   * ``code`` (optional)
+   * ``status`` (optional) – Defaults to pending for non-free orders and paid for free orders. You can only set this to
+     ``"n"`` for pending or ``"p"`` for paid. If you create a paid order, the ``order_paid`` signal will **not** be
+     sent out to plugins and no email will be sent. If you want that behavior, create an unpaid order and then call
+     the ``mark_paid`` API method.
+   * ``email``
+   * ``locale``
+   * ``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.
+   * ``payment_info`` (optional) – You can pass a nested JSON object that will be set as the internal ``payment_info``
+     value of the order. 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 provider will not be called
+     to do anything about this (i.e. if you pass a bank account to a debit provider, *no* charge will be created),
+     this is just informative in case you *handled the payment already*.
+   * ``comment`` (optional)
+   * ``checkin_attention`` (optional)
+   * ``invoice_address`` (optional)
+
+      * ``company``
+      * ``is_business``
+      * ``name``
+      * ``street``
+      * ``zipcode``
+      * ``city``
+      * ``country``
+      * ``internal_reference``
+      * ``vat_id``
+
+   * ``positions``
+
+      * ``positionid`` (optional, see below)
+      * ``item``
+      * ``variation``
+      * ``price``
+      * ``attendee_name``
+      * ``attendee_email``
+      * ``secret`` (optional)
+      * ``addon_to`` (optional, see below)
+      * ``subevent``
+      * ``answers``
+
+        * ``question``
+        * ``answer``
+        * ``options``
+
+   * ``fees``
+
+      * ``fee_type``
+      * ``value``
+      * ``description``
+      * ``internal_type``
+      * ``tax_rule``
+
+   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
+   IDs in the ``addon_to`` field of another position. Note that all add_ons for a specific position need to come
+   immediately after the position itself.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      POST /api/v1/organizers/bigevents/events/sampleconf/orders/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+      Content: application/json
+
+      {
+        "email": "dummy@example.org",
+        "locale": "en",
+        "fees": [
+          {
+            "fee_type": "payment",
+            "value": "0.25",
+            "description": "",
+            "internal_type": "",
+            "tax_rule": 2
+          }
+        ],
+        "payment_provider": "banktransfer",
+        "invoice_address": {
+          "is_business": False,
+          "company": "Sample company",
+          "name": "John Doe",
+          "street": "Sesam Street 12",
+          "zipcode": "12345",
+          "city": "Sample City",
+          "country": "UK",
+          "internal_reference": "",
+          "vat_id": ""
+        },
+        "positions": [
+          {
+            "positionid": 1,
+            "item": 1,
+            "variation": None,
+            "price": "23.00",
+            "attendee_name": "Peter",
+            "attendee_email": None,
+            "addon_to": None,
+            "answers": [
+              {
+                "question": 1,
+                "answer": "23",
+                "options": []
+              }
+            ],
+            "subevent": None
+          }
+        ],
+      }
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 201 Created
+      Vary: Accept
+      Content-Type: application/json
+
+      (Full order resource, see above.)
+
+   :param organizer: The ``slug`` field of the organizer of the event to create an item for
+   :param event: The ``slug`` field of the event to create an item for
+   :statuscode 201: no error
+   :statuscode 400: The item could not be created due to invalid submitted data or lack of quota.
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event does not exist **or** you have no permission to create this
+         order.
+
 .. http:post:: /api/v1/organizers/(organizer)/events/(event)/orders/(code)/mark_paid/
 
    Marks a pending or expired order as successfully paid.
@@ -525,6 +726,44 @@ Order endpoints
    :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view this resource.
    :statuscode 404: The requested order does not exist.
 
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/orders/(code)/mark_refunded/
+
+   Marks a paid order as refunded.
+
+   .. warning:: In the current implementation, this will **bypass** the payment provider, i.e. the money will **not** be
+                transferred back to the user automatically, the order will only be *marked* as refunded within pretix.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      POST /api/v1/organizers/bigevents/events/sampleconf/orders/ABC12/mark_expired/ 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
+
+      {
+        "code": "ABC12",
+        "status": "r",
+        ...
+      }
+
+   :param organizer: The ``slug`` field of the organizer to modify
+   :param event: The ``slug`` field of the event to modify
+   :param code: The ``code`` field of the order to modify
+   :statuscode 200: no error
+   :statuscode 400: The order cannot be marked as expired since the current order status does not allow it.
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view this resource.
+   :statuscode 404: The requested order does not exist.
+
 .. http:post:: /api/v1/organizers/(organizer)/events/(event)/orders/(code)/mark_expired/
 
    Marks a unpaid order as expired.
@@ -659,6 +898,7 @@ Order position endpoints
             "tax_rule": null,
             "tax_value": "0.00",
             "secret": "z3fsn8jyufm5kpk768q69gkbyr5f4h6w",
+            "pseudonymization_id": "MQLJvANO3B",
             "addon_to": null,
             "subevent": null,
             "checkins": [
@@ -751,6 +991,7 @@ Order position endpoints
         "secret": "z3fsn8jyufm5kpk768q69gkbyr5f4h6w",
         "addon_to": null,
         "subevent": null,
+        "pseudonymization_id": "MQLJvANO3B",
         "checkins": [
           {
             "list": 44,

doc/api/resources/questions.rst

@@ -1,5 +1,7 @@
 .. spelling:: checkin
 
+.. _rest-questions:
+
 Questions
 =========
 

doc/api/resources/quotas.rst

@@ -1,3 +1,5 @@
+.. _rest-quotas:
+
 Quotas
 ======
 

doc/api/resources/subevents.rst

@@ -1,3 +1,5 @@
+.. _rest-subevents:
+
 Event series dates / Sub-events
 ===============================
 

doc/api/resources/taxrules.rst

@@ -1,3 +1,5 @@
+.. _rest-taxrules:
+
 Tax rules
 =========
 

doc/development/api/general.rst

@@ -48,7 +48,7 @@ Backend
 -------
 
 .. automodule:: pretix.control.signals
-   :members: nav_event, html_head, quota_detail_html, nav_topbar, nav_global, nav_organizer, nav_event_settings, order_info, event_settings_widget
+   :members: nav_event, html_head, quota_detail_html, nav_topbar, nav_global, nav_organizer, nav_event_settings, order_info, event_settings_widget, oauth_application_registered
 
 
 .. automodule:: pretix.base.signals

doc/plugins/badges.rst

@@ -0,0 +1,110 @@
+Badges
+======
+
+The badges plugin provides a HTTP API that exposes the various layouts used to generate PDF badges.
+
+Resource description
+--------------------
+
+The badge layout resource contains the following public fields:
+
+.. rst-class:: rest-resource-table
+
+===================================== ========================== =======================================================
+Field                                 Type                       Description
+===================================== ========================== =======================================================
+id                                    integer                    Internal layout ID
+name                                  string                     Internal layout description
+default                               boolean                    ``true`` if this is the default layout
+layout                                object                     Layout specification for libpretixprint
+background                            URL                        Background PDF file
+item_assignments                      list of objects            Products this layout is assigned to
+└ item                                integer                    Item ID
+===================================== ========================== =======================================================
+
+.. versionchanged:: 1.16
+
+   This resource has been added.
+
+
+Endpoints
+---------
+
+.. http:get:: /api/v1/organizers/(organizer)/events/(event)/badgelayouts/
+
+   Returns a list of all badge layouts
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/events/democon/badgelayouts/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: text/javascript
+
+      {
+        "count": 1,
+        "next": null,
+        "previous": null,
+        "results": [
+          {
+            "id": 1,
+            "name": "Default layout",
+            "default": true,
+            "layout": {…},
+            "background": {},
+            "item_assignments": []
+          }
+        ]
+      }
+
+   :query page: The page number in case of a multi-page result set, default is 1
+   :param organizer: The ``slug`` field of a valid organizer
+   :param event: The ``slug`` field of a valid event
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer does not exist **or** you have no permission to view it.
+
+.. http:get:: /api/v1/organizers/(organizer)/events/(event)/badgelayouts/(id)/
+
+   Returns information on layout.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/events/democon/layoutsbadge/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: text/javascript
+
+      {
+        "id": 1,
+        "name": "Default layout",
+        "default": true,
+        "layout": {…},
+        "background": {},
+        "item_assignments": []
+      }
+
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :param event: The ``slug`` field of the event to fetch
+   :param id: The ``id`` field of the layout to fetch
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view it.

doc/plugins/index.rst

@@ -12,3 +12,5 @@ If you want to **create** a plugin, please go to the
    list
    pretixdroid
    banktransfer
+   ticketoutputpdf
+   badges

doc/plugins/pretixdroid.rst

@@ -81,6 +81,7 @@ uses to communicate with the pretix server.
           "attention": false,
           "redeemed": true,
           "checkin_allowed": true,
+          "addons_text": "Parking spot",
           "paid": true
         }
       }
@@ -106,6 +107,7 @@ uses to communicate with the pretix server.
           "attention": false,
           "redeemed": true,
           "checkin_allowed": true,
+          "addons_text": "Parking spot",
           "paid": true
         },
         "questions": [
@@ -152,6 +154,7 @@ uses to communicate with the pretix server.
           "attention": false,
           "redeemed": true,
           "checkin_allowed": true,
+          "addons_text": "Parking spot",
           "paid": true
         }
       }
@@ -212,6 +215,7 @@ uses to communicate with the pretix server.
             "redeemed": false,
             "attention": false,
             "checkin_allowed": true,
+            "addons_text": "Parking spot",
             "paid": true
           },
           ...

doc/plugins/ticketoutputpdf.rst

@@ -0,0 +1,111 @@
+PDF ticket output
+=================
+
+The PDF ticket output plugin provides a HTTP API that exposes the various layouts used
+to generate PDF tickets.
+
+Resource description
+--------------------
+
+The ticket layout resource contains the following public fields:
+
+.. rst-class:: rest-resource-table
+
+===================================== ========================== =======================================================
+Field                                 Type                       Description
+===================================== ========================== =======================================================
+id                                    integer                    Internal layout ID
+name                                  string                     Internal layout description
+default                               boolean                    ``true`` if this is the default layout
+layout                                object                     Layout specification for libpretixprint
+background                            URL                        Background PDF file
+item_assignments                      list of objects            Products this layout is assigned to
+└ item                                integer                    Item ID
+===================================== ========================== =======================================================
+
+.. versionchanged:: 1.16
+
+   This resource has been added.
+
+
+Endpoints
+---------
+
+.. http:get:: /api/v1/organizers/(organizer)/events/(event)/ticketlayouts/
+
+   Returns a list of all ticket layouts
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/events/democon/ticketlayouts/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: text/javascript
+
+      {
+        "count": 1,
+        "next": null,
+        "previous": null,
+        "results": [
+          {
+            "id": 1,
+            "name": "Default layout",
+            "default": true,
+            "layout": {…},
+            "background": {},
+            "item_assignments": []
+          }
+        ]
+      }
+
+   :query page: The page number in case of a multi-page result set, default is 1
+   :param organizer: The ``slug`` field of a valid organizer
+   :param event: The ``slug`` field of a valid event
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer does not exist **or** you have no permission to view it.
+
+.. http:get:: /api/v1/organizers/(organizer)/events/(event)/ticketlayouts/(id)/
+
+   Returns information on layout.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      GET /api/v1/organizers/bigevents/events/democon/ticketlayouts/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: text/javascript
+
+      {
+        "id": 1,
+        "name": "Default layout",
+        "default": true,
+        "layout": {…},
+        "background": {},
+        "item_assignments": []
+      }
+
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :param event: The ``slug`` field of the event to fetch
+   :param id: The ``id`` field of the layout to fetch
+   :statuscode 200: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view it.

doc/spelling_wordlist.txt

@@ -38,10 +38,12 @@ gunicorn
 hardcoded
 hostname
 idempotency
+incrementing
 inofficial
 invalidations
 iterable
 Jimdo
+libpretixprint
 libsass
 linters
 memcached
@@ -77,6 +79,7 @@ prometheus
 proxied
 proxying
 pseudonymize
+pseudonymization
 queryset
 redemptions
 redis

src/pretix/__init__.py

@@ -1 +1 @@
-__version__ = "1.15.2"
+__version__ = "1.16.0"

src/pretix/api/__init__.py

@@ -0,0 +1,9 @@
+from django.apps import AppConfig
+
+
+class PretixApiConfig(AppConfig):
+    name = 'pretix.api'
+    label = 'pretixapi'
+
+
+default_app_config = 'pretix.api.PretixApiConfig'

src/pretix/api/auth/permission.py

@@ -1,5 +1,6 @@
 from rest_framework.permissions import SAFE_METHODS, BasePermission
 
+from pretix.api.models import OAuthAccessToken
 from pretix.base.models import Event
 from pretix.base.models.organizer import Organizer, TeamAPIToken
 from pretix.helpers.security import (
@@ -55,6 +56,15 @@ class EventPermission(BasePermission):
 
             if required_permission and required_permission not in request.orgapermset:
                 return False
+
+        if isinstance(request.auth, OAuthAccessToken):
+            if not request.auth.allow_scopes(['write']) and request.method not in SAFE_METHODS:
+                return False
+            if not request.auth.allow_scopes(['read']) and request.method in SAFE_METHODS:
+                return False
+        if isinstance(request.auth, OAuthAccessToken) and hasattr(request, 'organizer'):
+            if not request.auth.organizers.filter(pk=request.organizer.pk).exists():
+                return False
         return True
 
 

src/pretix/api/migrations/0001_initial.py

@@ -0,0 +1,128 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.13 on 2018-06-04 11:19
+from __future__ import unicode_literals
+
+import django.db.models.deletion
+import oauth2_provider.generators
+import oauth2_provider.validators
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    initial = True
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='OAuthAccessToken',
+            fields=[
+                ('id', models.BigAutoField(primary_key=True, serialize=False)),
+                ('token', models.CharField(max_length=255, unique=True)),
+                ('expires', models.DateTimeField()),
+                ('scope', models.TextField(blank=True)),
+                ('created', models.DateTimeField(auto_now_add=True)),
+                ('updated', models.DateTimeField(auto_now=True)),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+        migrations.CreateModel(
+            name='OAuthApplication',
+            fields=[
+                ('id', models.BigAutoField(primary_key=True, serialize=False)),
+                ('client_type',
+                 models.CharField(choices=[('confidential', 'Confidential'), ('public', 'Public')], max_length=32)),
+                ('authorization_grant_type', models.CharField(
+                    choices=[('authorization-code', 'Authorization code'), ('implicit', 'Implicit'),
+                             ('password', 'Resource owner password-based'),
+                             ('client-credentials', 'Client credentials')], max_length=32)),
+                ('skip_authorization', models.BooleanField(default=False)),
+                ('created', models.DateTimeField(auto_now_add=True)),
+                ('updated', models.DateTimeField(auto_now=True)),
+                ('name', models.CharField(max_length=255, verbose_name='Application name')),
+                ('redirect_uris', models.TextField(help_text='Allowed URIs list, space separated',
+                                                   validators=[oauth2_provider.validators.validate_uris],
+                                                   verbose_name='Redirection URIs')),
+                ('client_id',
+                 models.CharField(db_index=True, default=oauth2_provider.generators.generate_client_id, max_length=100,
+                                  unique=True, verbose_name='Client ID')),
+                ('client_secret',
+                 models.CharField(db_index=True, default=oauth2_provider.generators.generate_client_secret,
+                                  max_length=255, verbose_name='Client secret')),
+                ('active', models.BooleanField(default=True)),
+                ('user', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE,
+                                           related_name='pretixapi_oauthapplication', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+        migrations.CreateModel(
+            name='OAuthGrant',
+            fields=[
+                ('id', models.BigAutoField(primary_key=True, serialize=False)),
+                ('code', models.CharField(max_length=255, unique=True)),
+                ('expires', models.DateTimeField()),
+                ('redirect_uri', models.CharField(max_length=255)),
+                ('scope', models.TextField(blank=True)),
+                ('created', models.DateTimeField(auto_now_add=True)),
+                ('updated', models.DateTimeField(auto_now=True)),
+                ('application', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE,
+                                                  to=settings.OAUTH2_PROVIDER_APPLICATION_MODEL)),
+                ('user',
+                 models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='pretixapi_oauthgrant',
+                                   to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+        migrations.CreateModel(
+            name='OAuthRefreshToken',
+            fields=[
+                ('id', models.BigAutoField(primary_key=True, serialize=False)),
+                ('token', models.CharField(max_length=255)),
+                ('created', models.DateTimeField(auto_now_add=True)),
+                ('updated', models.DateTimeField(auto_now=True)),
+                ('revoked', models.DateTimeField(null=True)),
+                ('access_token',
+                 models.OneToOneField(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL,
+                                      related_name='refresh_token', to=settings.OAUTH2_PROVIDER_ACCESS_TOKEN_MODEL)),
+                ('application', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE,
+                                                  to=settings.OAUTH2_PROVIDER_APPLICATION_MODEL)),
+                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE,
+                                           related_name='pretixapi_oauthrefreshtoken', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+        migrations.AddField(
+            model_name='oauthaccesstoken',
+            name='application',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE,
+                                    to=settings.OAUTH2_PROVIDER_APPLICATION_MODEL),
+        ),
+        migrations.AddField(
+            model_name='oauthaccesstoken',
+            name='source_refresh_token',
+            field=models.OneToOneField(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL,
+                                       related_name='refreshed_access_token',
+                                       to=settings.OAUTH2_PROVIDER_REFRESH_TOKEN_MODEL),
+        ),
+        migrations.AddField(
+            model_name='oauthaccesstoken',
+            name='user',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE,
+                                    related_name='pretixapi_oauthaccesstoken', to=settings.AUTH_USER_MODEL),
+        ),
+        migrations.AlterUniqueTogether(
+            name='oauthrefreshtoken',
+            unique_together=set([('token', 'revoked')]),
+        ),
+    ]

src/pretix/api/migrations/0002_auto_20180604_1120.py

@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.13 on 2018-06-04 11:20
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0001_initial'),
+        ('pretixapi', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='oauthaccesstoken',
+            name='organizers',
+            field=models.ManyToManyField(to='pretixbase.Organizer'),
+        ),
+        migrations.AddField(
+            model_name='oauthgrant',
+            name='organizers',
+            field=models.ManyToManyField(to='pretixbase.Organizer'),
+        ),
+    ]

src/pretix/api/models.py

@@ -0,0 +1,70 @@
+from datetime import timedelta
+
+from django.db import models
+from django.urls import reverse
+from django.utils.timezone import now
+from django.utils.translation import ugettext_lazy as _
+from oauth2_provider.generators import (
+    generate_client_id, generate_client_secret,
+)
+from oauth2_provider.models import (
+    AbstractAccessToken, AbstractApplication, AbstractGrant,
+    AbstractRefreshToken,
+)
+from oauth2_provider.validators import validate_uris
+
+
+class OAuthApplication(AbstractApplication):
+    name = models.CharField(verbose_name=_("Application name"), max_length=255, blank=False)
+    redirect_uris = models.TextField(
+        blank=False, validators=[validate_uris],
+        verbose_name=_("Redirection URIs"),
+        help_text=_("Allowed URIs list, space separated")
+    )
+    client_id = models.CharField(
+        verbose_name=_("Client ID"),
+        max_length=100, unique=True, default=generate_client_id, db_index=True
+    )
+    client_secret = models.CharField(
+        verbose_name=_("Client secret"),
+        max_length=255, blank=False, default=generate_client_secret, db_index=True
+    )
+    active = models.BooleanField(default=True)
+
+    def get_absolute_url(self):
+        return reverse("control:user.settings.oauth.app", kwargs={'pk': self.id})
+
+    def is_usable(self, request):
+        return self.active and super().is_usable(request)
+
+
+class OAuthGrant(AbstractGrant):
+    application = models.ForeignKey(
+        OAuthApplication, on_delete=models.CASCADE
+    )
+    organizers = models.ManyToManyField('pretixbase.Organizer')
+
+
+class OAuthAccessToken(AbstractAccessToken):
+    source_refresh_token = models.OneToOneField(
+        # unique=True implied by the OneToOneField
+        'OAuthRefreshToken', on_delete=models.SET_NULL, blank=True, null=True,
+        related_name="refreshed_access_token"
+    )
+    application = models.ForeignKey(
+        OAuthApplication, on_delete=models.CASCADE, blank=True, null=True,
+    )
+    organizers = models.ManyToManyField('pretixbase.Organizer')
+
+    def revoke(self):
+        self.expires = now() - timedelta(hours=1)
+        self.save(update_fields=['expires'])
+
+
+class OAuthRefreshToken(AbstractRefreshToken):
+    application = models.ForeignKey(
+        OAuthApplication, on_delete=models.CASCADE)
+    access_token = models.OneToOneField(
+        OAuthAccessToken, on_delete=models.SET_NULL, blank=True, null=True,
+        related_name="refresh_token"
+    )

src/pretix/api/oauth.py

@@ -0,0 +1,45 @@
+from datetime import timedelta
+
+from django.utils import timezone
+from oauth2_provider.exceptions import FatalClientError
+from oauth2_provider.oauth2_validators import Grant, OAuth2Validator
+from oauth2_provider.settings import oauth2_settings
+
+
+class Validator(OAuth2Validator):
+
+    def save_authorization_code(self, client_id, code, request, *args, **kwargs):
+        if not getattr(request, 'organizers', None):
+            raise FatalClientError('No organizers selected.')
+
+        expires = timezone.now() + timedelta(
+            seconds=oauth2_settings.AUTHORIZATION_CODE_EXPIRE_SECONDS)
+        g = Grant(application=request.client, user=request.user, code=code["code"],
+                  expires=expires, redirect_uri=request.redirect_uri,
+                  scope=" ".join(request.scopes))
+        g.save()
+        g.organizers.add(*request.organizers.all())
+
+    def validate_code(self, client_id, code, client, request, *args, **kwargs):
+        try:
+            grant = Grant.objects.get(code=code, application=client)
+            if not grant.is_expired():
+                request.scopes = grant.scope.split(" ")
+                request.user = grant.user
+                request.organizers = grant.organizers.all()
+                return True
+            return False
+
+        except Grant.DoesNotExist:
+            return False
+
+    def _create_access_token(self, expires, request, token, source_refresh_token=None):
+        if not getattr(request, 'organizers', None) and not getattr(source_refresh_token, 'access_token'):
+            raise FatalClientError('No organizers selected.')
+        if hasattr(request, 'organizers'):
+            orgs = list(request.organizers.all())
+        else:
+            orgs = list(source_refresh_token.access_token.organizers.all())
+        access_token = super()._create_access_token(expires, request, token, source_refresh_token=None)
+        access_token.organizers.add(*orgs)
+        return access_token

src/pretix/api/serializers/item.py

@@ -74,12 +74,12 @@ class ItemSerializer(I18nAwareModelSerializer):
 
     class Meta:
         model = Item
-        fields = ('id', 'category', 'name', 'active', 'description',
+        fields = ('id', 'category', 'name', 'internal_name', 'active', 'description',
                   'default_price', 'free_price', 'tax_rate', 'tax_rule', 'admission',
                   'position', 'picture', 'available_from', 'available_until',
                   'require_voucher', 'hide_without_voucher', 'allow_cancel',
                   'min_per_order', 'max_per_order', 'checkin_attention', 'has_variations',
-                  'variations', 'addons')
+                  'variations', 'addons', 'original_price')
         read_only_fields = ('has_variations', 'picture')
 
     def get_serializer_context(self):
@@ -129,7 +129,7 @@ class ItemCategorySerializer(I18nAwareModelSerializer):
 
     class Meta:
         model = ItemCategory
-        fields = ('id', 'name', 'description', 'position', 'is_addon')
+        fields = ('id', 'name', 'internal_name', 'description', 'position', 'is_addon')
 
 
 class QuestionOptionSerializer(I18nAwareModelSerializer):

src/pretix/api/serializers/order.py

@@ -1,18 +1,27 @@
+import json
+from collections import Counter
 from decimal import Decimal
 
+from django.utils.timezone import now
+from django_countries.fields import Country
 from rest_framework import serializers
+from rest_framework.exceptions import ValidationError
 from rest_framework.reverse import reverse
 
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
 from pretix.base.models import (
     Checkin, Invoice, InvoiceAddress, InvoiceLine, Order, OrderPosition,
-    QuestionAnswer,
+    Question, QuestionAnswer, Quota,
 )
 from pretix.base.models.orders import OrderFee
+from pretix.base.pdf import get_variables
 from pretix.base.signals import register_ticket_outputs
 
 
 class CompatibleCountryField(serializers.Field):
+    def to_internal_value(self, data):
+        return {self.field_name: Country(data)}
+
     def to_representation(self, instance: InvoiceAddress):
         if instance.country:
             return str(instance.country)
@@ -27,6 +36,13 @@ class InvoiceAddressSerializer(I18nAwareModelSerializer):
         model = InvoiceAddress
         fields = ('last_modified', 'is_business', 'company', 'name', 'street', 'zipcode', 'city', 'country', 'vat_id',
                   'vat_id_validated', 'internal_reference')
+        read_only_fields = ('last_modified', 'vat_id_validated')
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        for v in self.fields.values():
+            v.required = False
+            v.allow_blank = True
 
 
 class AnswerQuestionIdentifierField(serializers.Field):
@@ -104,17 +120,39 @@ class PositionDownloadsField(serializers.Field):
         return res
 
 
+class PdfDataSerializer(serializers.Field):
+    def to_representation(self, instance: OrderPosition):
+        res = {}
+
+        ev = instance.subevent or instance.order.event
+
+        pdfvars = get_variables(instance.order.event)
+        for k, f in pdfvars.items():
+            res[k] = f['evaluate'](instance, instance.order, ev)
+
+        for k, v in ev.meta_data.items():
+            res['meta:' + k] = v
+
+        return res
+
+
 class OrderPositionSerializer(I18nAwareModelSerializer):
     checkins = CheckinSerializer(many=True)
     answers = AnswerSerializer(many=True)
     downloads = PositionDownloadsField(source='*')
     order = serializers.SlugRelatedField(slug_field='code', read_only=True)
+    pdf_data = PdfDataSerializer(source='*')
 
     class Meta:
         model = OrderPosition
         fields = ('id', 'order', 'positionid', 'item', 'variation', 'price', 'attendee_name', 'attendee_email',
                   'voucher', 'tax_rate', 'tax_value', 'secret', 'addon_to', 'subevent', 'checkins', 'downloads',
-                  'answers', 'tax_rule')
+                  'answers', 'tax_rule', 'pseudonymization_id', 'pdf_data')
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        if 'request' in self.context and not self.context['request'].query_params.get('pdf_data', 'false') == 'true':
+            self.fields.pop('pdf_data')
 
 
 class OrderFeeSerializer(I18nAwareModelSerializer):
@@ -123,18 +161,6 @@ class OrderFeeSerializer(I18nAwareModelSerializer):
         fields = ('fee_type', 'value', 'description', 'internal_type', 'tax_rate', 'tax_value', 'tax_rule')
 
 
-class PaymentFeeLegacyField(serializers.Field):
-    def __init__(self, *args, **kwargs):
-        self.attr = kwargs.pop('attribute')
-        super().__init__(*args, **kwargs)
-
-    def to_representation(self, instance: Order):
-        return str(
-            sum([getattr(f, self.attr) for f in instance.fees.all() if f.fee_type == OrderFee.FEE_TYPE_PAYMENT],
-                Decimal('0.00'))
-        )
-
-
 class OrderSerializer(I18nAwareModelSerializer):
     invoice_address = InvoiceAddressSerializer()
     positions = OrderPositionSerializer(many=True)
@@ -145,7 +171,287 @@ class OrderSerializer(I18nAwareModelSerializer):
         model = Order
         fields = ('code', 'status', 'secret', 'email', 'locale', 'datetime', 'expires', 'payment_date',
                   'payment_provider', 'fees', 'total', 'comment', 'invoice_address', 'positions', 'downloads',
-                  'checkin_attention')
+                  'checkin_attention', 'last_modified')
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        if not self.context['request'].query_params.get('pdf_data', 'false') == 'true':
+            self.fields['positions'].child.fields.pop('pdf_data')
+
+
+class AnswerCreateSerializer(I18nAwareModelSerializer):
+
+    class Meta:
+        model = QuestionAnswer
+        fields = ('question', 'answer', 'options')
+
+    def validate_question(self, q):
+        if q.event != self.context['event']:
+            raise ValidationError(
+                'The specified question does not belong to this event.'
+            )
+        return q
+
+    def validate(self, data):
+        if data.get('question').type == Question.TYPE_FILE:
+            raise ValidationError(
+                'File uploads are currently not supported via the API.'
+            )
+        elif data.get('question').type in (Question.TYPE_CHOICE, Question.TYPE_CHOICE_MULTIPLE):
+            if not data.get('options'):
+                raise ValidationError(
+                    'You need to specify options if the question is of a choice type.'
+                )
+            if data.get('question').type == Question.TYPE_CHOICE and len(data.get('options')) > 1:
+                raise ValidationError(
+                    'You can specify at most one option for this question.'
+                )
+            data['answer'] = ", ".join([str(o) for o in data.get('options')])
+
+        else:
+            if data.get('options'):
+                raise ValidationError(
+                    'You should not specify options if the question is not of a choice type.'
+                )
+
+            if data.get('question').type == Question.TYPE_BOOLEAN:
+                if data.get('answer') in ['true', 'True', '1', 'TRUE']:
+                    data['answer'] = 'True'
+                elif data.get('answer') in ['false', 'False', '0', 'FALSE']:
+                    data['answer'] = 'False'
+                else:
+                    raise ValidationError(
+                        'Please specify "true" or "false" for boolean questions.'
+                    )
+            elif data.get('question').type == Question.TYPE_NUMBER:
+                serializers.DecimalField(
+                    max_digits=50,
+                    decimal_places=25
+                ).to_internal_value(data.get('answer'))
+            elif data.get('question').type == Question.TYPE_DATE:
+                data['answer'] = serializers.DateField().to_internal_value(data.get('answer'))
+            elif data.get('question').type == Question.TYPE_TIME:
+                data['answer'] = serializers.TimeField().to_internal_value(data.get('answer'))
+            elif data.get('question').type == Question.TYPE_DATETIME:
+                data['answer'] = serializers.DateTimeField().to_internal_value(data.get('answer'))
+        return data
+
+
+class OrderFeeCreateSerializer(I18nAwareModelSerializer):
+    class Meta:
+        model = OrderFee
+        fields = ('fee_type', 'value', 'description', 'internal_type', 'tax_rule')
+
+    def validate_tax_rule(self, tr):
+        if tr and tr.event != self.context['event']:
+            raise ValidationError(
+                'The specified tax rate does not belong to this event.'
+            )
+        return tr
+
+
+class OrderPositionCreateSerializer(I18nAwareModelSerializer):
+    answers = AnswerCreateSerializer(many=True, required=False)
+    addon_to = serializers.IntegerField(required=False, allow_null=True)
+    secret = serializers.CharField(required=False)
+
+    class Meta:
+        model = OrderPosition
+        fields = ('positionid', 'item', 'variation', 'price', 'attendee_name', 'attendee_email',
+                  'secret', 'addon_to', 'subevent', 'answers')
+
+    def validate_secret(self, secret):
+        if secret and OrderPosition.objects.filter(order__event=self.context['event'], secret=secret).exists():
+            raise ValidationError(
+                'You cannot assign a position secret that already exists.'
+            )
+        return secret
+
+    def validate_item(self, item):
+        if item.event != self.context['event']:
+            raise ValidationError(
+                'The specified item does not belong to this event.'
+            )
+        if not item.active:
+            raise ValidationError(
+                'The specified item is not active.'
+            )
+        return item
+
+    def validate_subevent(self, subevent):
+        if self.context['event'].has_subevents:
+            if not subevent:
+                raise ValidationError(
+                    'You need to set a subevent.'
+                )
+            if subevent.event != self.context['event']:
+                raise ValidationError(
+                    'The specified subevent does not belong to this event.'
+                )
+        elif subevent:
+            raise ValidationError(
+                'You cannot set a subevent for this event.'
+            )
+        return subevent
+
+    def validate(self, data):
+        if data.get('item'):
+            if data.get('item').has_variations:
+                if not data.get('variation'):
+                    raise ValidationError('You should specify a variation for this item.')
+                else:
+                    if data.get('variation').item != data.get('item'):
+                        raise ValidationError(
+                            'The specified variation does not belong to the specified item.'
+                        )
+            elif data.get('variation'):
+                raise ValidationError(
+                    'You cannot specify a variation for this item.'
+                )
+        return data
+
+
+class CompatibleJSONField(serializers.JSONField):
+    def to_internal_value(self, data):
+        try:
+            return json.dumps(data)
+        except (TypeError, ValueError):
+            self.fail('invalid')
+
+    def to_representation(self, value):
+        if value:
+            return json.loads(value)
+        return value
+
+
+class OrderCreateSerializer(I18nAwareModelSerializer):
+    invoice_address = InvoiceAddressSerializer(required=False)
+    positions = OrderPositionCreateSerializer(many=True, required=False)
+    fees = OrderFeeCreateSerializer(many=True, required=False)
+    status = serializers.ChoiceField(choices=(
+        ('n', Order.STATUS_PENDING),
+        ('p', Order.STATUS_PAID),
+    ), default='n', required=False)
+    code = serializers.CharField(
+        required=False,
+        max_length=16,
+        min_length=5
+    )
+    comment = serializers.CharField(required=False, allow_blank=True)
+    payment_provider = serializers.CharField(required=True)
+    payment_info = CompatibleJSONField(required=False)
+
+    class Meta:
+        model = Order
+        fields = ('code', 'status', 'email', 'locale', 'payment_provider', 'fees', 'comment',
+                  'invoice_address', 'positions', 'checkin_attention', 'payment_info')
+
+    def validate_payment_provider(self, pp):
+        if pp not in self.context['event'].get_payment_providers():
+            raise ValidationError('The given payment provider is not known.')
+        return pp
+
+    def validate_code(self, code):
+        if code and Order.objects.filter(event__organizer=self.context['event'].organizer, code=code).exists():
+            raise ValidationError(
+                'This order code is already in use.'
+            )
+        if any(c not in 'ABCDEFGHJKLMNPQRSTUVWXYZ1234567890' for c in code):
+            raise ValidationError(
+                'This order code contains invalid characters.'
+            )
+        return code
+
+    def validate_positions(self, data):
+        if not data:
+            raise ValidationError(
+                'An order cannot be empty.'
+            )
+        if any([p.get('positionid') for p in data]):
+            if not all([p.get('positionid') for p in data]):
+                raise ValidationError(
+                    'If you set position IDs manually, you need to do so for all positions.'
+                )
+
+            last_non_add_on = None
+            last_posid = 0
+
+            for p in data:
+                if p['positionid'] != last_posid + 1:
+                    raise ValidationError("Position IDs need to be consecutive.")
+                if p.get('addon_to') and p['addon_to'] != last_non_add_on:
+                    raise ValidationError("If you set addon_to, you need to make sure that the referenced "
+                                          "position ID exists and is transmitted directly before its add-ons.")
+
+                if not p.get('addon_to'):
+                    last_non_add_on = p['positionid']
+                last_posid = p['positionid']
+
+        elif any([p.get('addon_to') for p in data]):
+            raise ValidationError("If you set addon_to, you need to specify position IDs manually.")
+        return data
+
+    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 []
+        if 'invoice_address' in validated_data:
+            ia = InvoiceAddress(**validated_data.pop('invoice_address'))
+        else:
+            ia = None
+
+        with self.context['event'].lock():
+            quotadiff = Counter()
+            for pos_data in positions_data:
+                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')))
+                quotadiff.update(new_quotas)
+
+                for quota, diff in quotadiff.items():
+                    avail = quota.availability()
+                    if avail[0] != Quota.AVAILABILITY_OK or (avail[1] is not None and avail[1] < diff):
+                        raise ValidationError(
+                            'There is not enough quota available on quota "{}" to perform the operation.'.format(
+                                quota.name
+                            )
+                        )
+
+            order = Order(event=self.context['event'], **validated_data)
+            order.set_expires(subevents=[p['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'))
+            if order.total == Decimal('0.00') and validated_data.get('status') != Order.STATUS_PAID:
+                order.payment_provider = 'free'
+                order.status = Order.STATUS_PAID
+            elif order.payment_provider == "free" and order.total != Decimal('0.00'):
+                raise ValidationError('You cannot use the "free" payment provider for non-free orders.')
+            if validated_data.get('status') == Order.STATUS_PAID:
+                order.payment_date = now()
+            order.save()
+            if ia:
+                ia.order = order
+                ia.save()
+            pos_map = {}
+            for pos_data in positions_data:
+                answers_data = pos_data.pop('answers')
+                addon_to = pos_data.pop('addon_to')
+                pos = OrderPosition(**pos_data)
+                pos.order = order
+                pos._calculate_tax()
+                if addon_to:
+                    pos.addon_to = pos_map[addon_to]
+                pos.save()
+                pos_map[pos.positionid] = pos
+                for answ_data in answers_data:
+                    options = answ_data.pop('options')
+                    answ = pos.answers.create(**answ_data)
+                    answ.options.add(*options)
+        for fee_data in fees_data:
+            f = OrderFee(**fee_data)
+            f.order = order
+            f._calculate_tax()
+            f.save()
+
+        return order
 
 
 class InlineInvoiceLineSerializer(I18nAwareModelSerializer):

src/pretix/api/urls.py

@@ -4,7 +4,9 @@ from django.apps import apps
 from django.conf.urls import include, url
 from rest_framework import routers
 
-from .views import checkin, event, item, order, organizer, voucher, waitinglist
+from .views import (
+    checkin, event, item, oauth, order, organizer, voucher, waitinglist,
+)
 
 router = routers.DefaultRouter()
 router.register(r'organizers', organizer.OrganizerViewSet)
@@ -52,4 +54,7 @@ urlpatterns = [
         include(question_router.urls)),
     url(r'^organizers/(?P<organizer>[^/]+)/events/(?P<event>[^/]+)/checkinlists/(?P<list>[^/]+)/',
         include(checkinlist_router.urls)),
+    url(r"^oauth/authorize$", oauth.AuthorizationView.as_view(), name="authorize"),
+    url(r"^oauth/token$", oauth.TokenView.as_view(), name="token"),
+    url(r"^oauth/revoke_token$", oauth.RevokeTokenView.as_view(), name="revoke-token"),
 ]

src/pretix/api/views/__init__.py

@@ -1,3 +1,8 @@
+from calendar import timegm
+
+from django.db.models import Max
+from django.http import HttpResponse
+from django.utils.http import http_date, parse_http_date_safe
 from rest_framework.filters import OrderingFilter
 
 
@@ -21,3 +26,33 @@ class RichOrderingFilter(OrderingFilter):
             return queryset.order_by(*ordering)
 
         return queryset
+
+
+class ConditionalListView:
+
+    def list(self, request, **kwargs):
+        if_modified_since = request.META.get('HTTP_IF_MODIFIED_SINCE')
+        if if_modified_since:
+            if_modified_since = parse_http_date_safe(if_modified_since)
+        if_unmodified_since = request.META.get('HTTP_IF_UNMODIFIED_SINCE')
+        if if_unmodified_since:
+            if_unmodified_since = parse_http_date_safe(if_unmodified_since)
+        lmd = request.event.logentry_set.filter(
+            content_type__model=self.queryset.model._meta.model_name,
+            content_type__app_label=self.queryset.model._meta.app_label,
+        ).aggregate(
+            m=Max('datetime')
+        )['m']
+        if lmd:
+            lmd_ts = timegm(lmd.utctimetuple())
+
+        if if_unmodified_since and lmd and lmd_ts > if_unmodified_since:
+            return HttpResponse(status=412)
+
+        if if_modified_since and lmd and lmd_ts <= if_modified_since:
+            return HttpResponse(status=304)
+
+        resp = super().list(request, **kwargs)
+        if lmd:
+            resp['Last-Modified'] = http_date(lmd_ts)
+        return resp

src/pretix/api/views/checkin.py

@@ -16,7 +16,6 @@ from pretix.api.serializers.order import OrderPositionSerializer
 from pretix.api.views import RichOrderingFilter
 from pretix.api.views.order import OrderPositionFilter
 from pretix.base.models import Checkin, CheckinList, Order, OrderPosition
-from pretix.base.models.organizer import TeamAPIToken
 from pretix.base.services.checkin import (
     CheckInError, RequiredQuestionsError, perform_checkin,
 )
@@ -49,7 +48,7 @@ class CheckinListViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.checkinlist.added',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
 
@@ -63,7 +62,7 @@ class CheckinListViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.checkinlist.changed',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
 
@@ -71,7 +70,7 @@ class CheckinListViewSet(viewsets.ModelViewSet):
         instance.log_action(
             'pretix.event.checkinlist.deleted',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
         )
         super().perform_destroy(instance)
 

src/pretix/api/views/event.py

@@ -9,9 +9,9 @@ from pretix.api.serializers.event import (
     CloneEventSerializer, EventSerializer, SubEventSerializer,
     TaxRuleSerializer,
 )
+from pretix.api.views import ConditionalListView
 from pretix.base.models import Event, ItemCategory, TaxRule
 from pretix.base.models.event import SubEvent
-from pretix.base.models.organizer import TeamAPIToken
 from pretix.helpers.dicts import merge_dicts
 
 
@@ -38,7 +38,7 @@ class EventViewSet(viewsets.ModelViewSet):
             serializer.instance.log_action(
                 log_action,
                 user=self.request.user,
-                api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+                auth=self.request.auth,
                 data=self.request.data
             )
 
@@ -51,7 +51,7 @@ class EventViewSet(viewsets.ModelViewSet):
                 serializer.instance.log_action(
                     'pretix.event.plugins.' + action,
                     user=self.request.user,
-                    api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+                    auth=self.request.auth,
                     data={'plugin': module}
                 )
 
@@ -60,7 +60,7 @@ class EventViewSet(viewsets.ModelViewSet):
             serializer.instance.log_action(
                 'pretix.event.changed',
                 user=self.request.user,
-                api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+                auth=self.request.auth,
                 data=self.request.data
             )
 
@@ -69,7 +69,7 @@ class EventViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.added',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
 
@@ -114,7 +114,7 @@ class CloneEventViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.added',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
 
@@ -125,7 +125,7 @@ class SubEventFilter(FilterSet):
         fields = ['active']
 
 
-class SubEventViewSet(viewsets.ReadOnlyModelViewSet):
+class SubEventViewSet(ConditionalListView, viewsets.ReadOnlyModelViewSet):
     serializer_class = SubEventSerializer
     queryset = ItemCategory.objects.none()
     filter_backends = (DjangoFilterBackend, filters.OrderingFilter)
@@ -137,7 +137,7 @@ class SubEventViewSet(viewsets.ReadOnlyModelViewSet):
         )
 
 
-class TaxRuleViewSet(viewsets.ModelViewSet):
+class TaxRuleViewSet(ConditionalListView, viewsets.ModelViewSet):
     serializer_class = TaxRuleSerializer
     queryset = TaxRule.objects.none()
     write_permission = 'can_change_event_settings'
@@ -150,7 +150,7 @@ class TaxRuleViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.taxrule.changed',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
 
@@ -159,7 +159,7 @@ class TaxRuleViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.taxrule.added',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
 
@@ -170,6 +170,6 @@ class TaxRuleViewSet(viewsets.ModelViewSet):
         instance.log_action(
             'pretix.event.taxrule.deleted',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
         )
         super().perform_destroy(instance)

src/pretix/api/views/item.py

@@ -13,11 +13,11 @@ from pretix.api.serializers.item import (
     ItemVariationSerializer, QuestionOptionSerializer, QuestionSerializer,
     QuotaSerializer,
 )
+from pretix.api.views import ConditionalListView
 from pretix.base.models import (
     Item, ItemAddOn, ItemCategory, ItemVariation, Question, QuestionOption,
     Quota,
 )
-from pretix.base.models.organizer import TeamAPIToken
 from pretix.helpers.dicts import merge_dicts
 
 
@@ -35,7 +35,7 @@ class ItemFilter(FilterSet):
         fields = ['active', 'category', 'admission', 'tax_rate', 'free_price']
 
 
-class ItemViewSet(viewsets.ModelViewSet):
+class ItemViewSet(ConditionalListView, viewsets.ModelViewSet):
     serializer_class = ItemSerializer
     queryset = Item.objects.none()
     filter_backends = (DjangoFilterBackend, OrderingFilter)
@@ -53,7 +53,7 @@ class ItemViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.item.added',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
 
@@ -68,7 +68,7 @@ class ItemViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.item.changed',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
 
@@ -81,7 +81,7 @@ class ItemViewSet(viewsets.ModelViewSet):
         instance.log_action(
             'pretix.event.item.deleted',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
         )
         super().perform_destroy(instance)
 
@@ -113,7 +113,7 @@ class ItemVariationViewSet(viewsets.ModelViewSet):
         item.log_action(
             'pretix.event.item.variation.added',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=merge_dicts(self.request.data, {'ORDER': serializer.instance.position}, {'id': serializer.instance.pk},
                              {'value': serializer.instance.value})
         )
@@ -123,7 +123,7 @@ class ItemVariationViewSet(viewsets.ModelViewSet):
         serializer.instance.item.log_action(
             'pretix.event.item.variation.changed',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=merge_dicts(self.request.data, {'ORDER': serializer.instance.position}, {'id': serializer.instance.pk},
                              {'value': serializer.instance.value})
         )
@@ -140,7 +140,7 @@ class ItemVariationViewSet(viewsets.ModelViewSet):
         instance.item.log_action(
             'pretix.event.item.variation.deleted',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data={
                 'value': instance.value,
                 'id': self.kwargs['pk']
@@ -174,7 +174,7 @@ class ItemAddOnViewSet(viewsets.ModelViewSet):
         item.log_action(
             'pretix.event.item.addons.added',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=merge_dicts(self.request.data, {'ORDER': serializer.instance.position}, {'id': serializer.instance.pk})
         )
 
@@ -183,7 +183,7 @@ class ItemAddOnViewSet(viewsets.ModelViewSet):
         serializer.instance.base_item.log_action(
             'pretix.event.item.addons.changed',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=merge_dicts(self.request.data, {'ORDER': serializer.instance.position}, {'id': serializer.instance.pk})
         )
 
@@ -192,7 +192,7 @@ class ItemAddOnViewSet(viewsets.ModelViewSet):
         instance.base_item.log_action(
             'pretix.event.item.addons.removed',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data={'category': instance.addon_category.pk}
         )
 
@@ -203,7 +203,7 @@ class ItemCategoryFilter(FilterSet):
         fields = ['is_addon']
 
 
-class ItemCategoryViewSet(viewsets.ModelViewSet):
+class ItemCategoryViewSet(ConditionalListView, viewsets.ModelViewSet):
     serializer_class = ItemCategorySerializer
     queryset = ItemCategory.objects.none()
     filter_backends = (DjangoFilterBackend, OrderingFilter)
@@ -221,7 +221,7 @@ class ItemCategoryViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.category.added',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
 
@@ -235,7 +235,7 @@ class ItemCategoryViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.category.changed',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
 
@@ -246,7 +246,7 @@ class ItemCategoryViewSet(viewsets.ModelViewSet):
         instance.log_action(
             'pretix.event.category.deleted',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
         )
         super().perform_destroy(instance)
 
@@ -257,7 +257,7 @@ class QuestionFilter(FilterSet):
         fields = ['ask_during_checkin', 'required', 'identifier']
 
 
-class QuestionViewSet(viewsets.ModelViewSet):
+class QuestionViewSet(ConditionalListView, viewsets.ModelViewSet):
     serializer_class = QuestionSerializer
     queryset = Question.objects.none()
     filter_backends = (DjangoFilterBackend, OrderingFilter)
@@ -274,7 +274,7 @@ class QuestionViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.question.added',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
 
@@ -288,7 +288,7 @@ class QuestionViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.question.changed',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
 
@@ -296,7 +296,7 @@ class QuestionViewSet(viewsets.ModelViewSet):
         instance.log_action(
             'pretix.event.question.deleted',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
         )
         super().perform_destroy(instance)
 
@@ -326,7 +326,7 @@ class QuestionOptionViewSet(viewsets.ModelViewSet):
         q.log_action(
             'pretix.event.question.option.added',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=merge_dicts(self.request.data, {'ORDER': serializer.instance.position}, {'id': serializer.instance.pk})
         )
 
@@ -335,7 +335,7 @@ class QuestionOptionViewSet(viewsets.ModelViewSet):
         serializer.instance.question.log_action(
             'pretix.event.question.option.changed',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=merge_dicts(self.request.data, {'ORDER': serializer.instance.position}, {'id': serializer.instance.pk})
         )
 
@@ -343,7 +343,7 @@ class QuestionOptionViewSet(viewsets.ModelViewSet):
         instance.question.log_action(
             'pretix.event.question.option.deleted',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data={'id': instance.pk}
         )
         super().perform_destroy(instance)
@@ -355,7 +355,7 @@ class QuotaFilter(FilterSet):
         fields = ['subevent']
 
 
-class QuotaViewSet(viewsets.ModelViewSet):
+class QuotaViewSet(ConditionalListView, viewsets.ModelViewSet):
     serializer_class = QuotaSerializer
     queryset = Quota.objects.none()
     filter_backends = (DjangoFilterBackend, OrderingFilter,)
@@ -373,14 +373,14 @@ class QuotaViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.quota.added',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
         if serializer.instance.subevent:
             serializer.instance.subevent.log_action(
                 'pretix.subevent.quota.added',
                 user=self.request.user,
-                api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+                auth=self.request.auth,
                 data=self.request.data
             )
 
@@ -396,7 +396,7 @@ class QuotaViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.quota.changed',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
         if current_subevent == request_subevent:
@@ -404,7 +404,7 @@ class QuotaViewSet(viewsets.ModelViewSet):
                 current_subevent.log_action(
                     'pretix.subevent.quota.changed',
                     user=self.request.user,
-                    api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+                    auth=self.request.auth,
                     data=self.request.data
                 )
         else:
@@ -412,14 +412,14 @@ class QuotaViewSet(viewsets.ModelViewSet):
                 request_subevent.log_action(
                     'pretix.subevent.quota.added',
                     user=self.request.user,
-                    api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+                    auth=self.request.auth,
                     data=self.request.data
                 )
             if current_subevent is not None:
                 current_subevent.log_action(
                     'pretix.subevent.quota.deleted',
                     user=self.request.user,
-                    api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+                    auth=self.request.auth,
                 )
         serializer.instance.rebuild_cache()
 
@@ -427,13 +427,13 @@ class QuotaViewSet(viewsets.ModelViewSet):
         instance.log_action(
             'pretix.event.quota.deleted',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
         )
         if instance.subevent:
             instance.subevent.log_action(
                 'pretix.subevent.quota.deleted',
                 user=self.request.user,
-                api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+                auth=self.request.auth,
             )
         super().perform_destroy(instance)
 

src/pretix/api/views/oauth.py

@@ -0,0 +1,92 @@
+import logging
+
+from django import forms
+from django.conf import settings
+from django.utils.translation import ugettext as _
+from oauth2_provider.exceptions import OAuthToolkitError
+from oauth2_provider.forms import AllowForm
+from oauth2_provider.views import (
+    AuthorizationView as BaseAuthorizationView,
+    RevokeTokenView as BaseRevokeTokenView, TokenView as BaseTokenView,
+)
+
+from pretix.api.models import OAuthApplication
+from pretix.base.models import Organizer
+
+logger = logging.getLogger(__name__)
+
+
+class OAuthAllowForm(AllowForm):
+    organizers = forms.ModelMultipleChoiceField(
+        queryset=Organizer.objects.none(),
+        widget=forms.CheckboxSelectMultiple
+    )
+
+    def __init__(self, *args, **kwargs):
+        user = kwargs.pop('user')
+        super().__init__(*args, **kwargs)
+        self.fields['organizers'].queryset = Organizer.objects.filter(
+            pk__in=user.teams.values_list('organizer', flat=True))
+
+
+class AuthorizationView(BaseAuthorizationView):
+    template_name = "pretixcontrol/auth/oauth_authorization.html"
+    form_class = OAuthAllowForm
+
+    def get_form_kwargs(self):
+        kwargs = super().get_form_kwargs()
+        kwargs['user'] = self.request.user
+        return kwargs
+
+    def get_context_data(self, **kwargs):
+        ctx = super().get_context_data(**kwargs)
+        ctx['settings'] = settings
+        return ctx
+
+    def create_authorization_response(self, request, scopes, credentials, allow, organizers):
+        credentials["organizers"] = organizers
+        return super().create_authorization_response(request, scopes, credentials, allow)
+
+    def form_valid(self, form):
+        client_id = form.cleaned_data["client_id"]
+        application = OAuthApplication.objects.get(client_id=client_id)
+        credentials = {
+            "client_id": form.cleaned_data.get("client_id"),
+            "redirect_uri": form.cleaned_data.get("redirect_uri"),
+            "response_type": form.cleaned_data.get("response_type", None),
+            "state": form.cleaned_data.get("state", None),
+        }
+        scopes = form.cleaned_data.get("scope")
+        allow = form.cleaned_data.get("allow")
+
+        try:
+            uri, headers, body, status = self.create_authorization_response(
+                request=self.request, scopes=scopes, credentials=credentials, allow=allow,
+                organizers=form.cleaned_data.get("organizers")
+            )
+        except OAuthToolkitError as error:
+            return self.error_response(error, application)
+
+        self.success_url = uri
+        logger.debug("Success url for the request: {0}".format(self.success_url))
+
+        msgs = [
+            _('The application "{application_name}" has been authorized to access your account.').format(
+                application_name=application.name
+            )
+        ]
+        self.request.user.send_security_notice(msgs)
+        self.request.user.log_action('pretix.user.oauth.authorized', user=self.request.user, data={
+            'application_id': application.pk,
+            'application_name': application.name,
+        })
+
+        return self.redirect(self.success_url, application)
+
+
+class TokenView(BaseTokenView):
+    pass
+
+
+class RevokeTokenView(BaseRevokeTokenView):
+    pass

src/pretix/api/views/order.py

@@ -2,10 +2,11 @@ import datetime
 
 import django_filters
 import pytz
+from django.db import transaction
 from django.db.models import Q
 from django.db.models.functions import Concat
 from django.http import FileResponse
-from django.utils.timezone import make_aware
+from django.utils.timezone import make_aware, now
 from django_filters.rest_framework import DjangoFilterBackend, FilterSet
 from rest_framework import serializers, status, viewsets
 from rest_framework.decorators import detail_route
@@ -13,38 +14,44 @@ from rest_framework.exceptions import (
     APIException, NotFound, PermissionDenied, ValidationError,
 )
 from rest_framework.filters import OrderingFilter
+from rest_framework.mixins import CreateModelMixin
 from rest_framework.response import Response
 
+from pretix.api.models import OAuthAccessToken
 from pretix.api.serializers.order import (
-    InvoiceSerializer, OrderPositionSerializer, OrderSerializer,
+    InvoiceSerializer, OrderCreateSerializer, OrderPositionSerializer,
+    OrderSerializer,
+)
+from pretix.base.models import (
+    Invoice, Order, OrderPosition, Quota, TeamAPIToken,
 )
-from pretix.base.models import Invoice, Order, OrderPosition, Quota
-from pretix.base.models.organizer import TeamAPIToken
 from pretix.base.services.invoices import (
-    generate_cancellation, generate_invoice, invoice_pdf, regenerate_invoice,
+    generate_cancellation, generate_invoice, invoice_pdf, invoice_qualified,
+    regenerate_invoice,
 )
 from pretix.base.services.mail import SendMailException
 from pretix.base.services.orders import (
     OrderError, cancel_order, extend_order, mark_order_expired,
-    mark_order_paid,
+    mark_order_paid, mark_order_refunded,
 )
 from pretix.base.services.tickets import (
     get_cachedticket_for_order, get_cachedticket_for_position,
 )
-from pretix.base.signals import register_ticket_outputs
+from pretix.base.signals import order_placed, register_ticket_outputs
 
 
 class OrderFilter(FilterSet):
     email = django_filters.CharFilter(name='email', lookup_expr='iexact')
     code = django_filters.CharFilter(name='code', lookup_expr='iexact')
     status = django_filters.CharFilter(name='status', lookup_expr='iexact')
+    modified_since = django_filters.IsoDateTimeFilter(name='last_modified', lookup_expr='gte')
 
     class Meta:
         model = Order
         fields = ['code', 'status', 'email', 'locale']
 
 
-class OrderViewSet(viewsets.ReadOnlyModelViewSet):
+class OrderViewSet(CreateModelMixin, viewsets.ReadOnlyModelViewSet):
     serializer_class = OrderSerializer
     queryset = Order.objects.none()
     filter_backends = (DjangoFilterBackend, OrderingFilter)
@@ -55,6 +62,11 @@ class OrderViewSet(viewsets.ReadOnlyModelViewSet):
     permission = 'can_view_orders'
     write_permission = 'can_change_orders'
 
+    def get_serializer_context(self):
+        ctx = super().get_serializer_context()
+        ctx['event'] = self.request.event
+        return ctx
+
     def get_queryset(self):
         return self.request.event.orders.prefetch_related(
             'positions', 'positions__checkins', 'positions__item', 'positions__answers', 'positions__answers__options',
@@ -71,6 +83,20 @@ class OrderViewSet(viewsets.ReadOnlyModelViewSet):
                 return prov
         raise NotFound('Unknown output provider.')
 
+    def list(self, request, **kwargs):
+        date = serializers.DateTimeField().to_representation(now())
+        queryset = self.filter_queryset(self.get_queryset())
+
+        page = self.paginate_queryset(queryset)
+        if page is not None:
+            serializer = self.get_serializer(page, many=True)
+            resp = self.get_paginated_response(serializer.data)
+            resp['X-Page-Generated'] = date
+            return resp
+
+        serializer = self.get_serializer(queryset, many=True)
+        return Response(serializer.data, headers={'X-Page-Generated': date})
+
     @detail_route(url_name='download', url_path='download/(?P<output>[^/]+)')
     def download(self, request, output, **kwargs):
         provider = self._get_output_provider(output)
@@ -100,7 +126,7 @@ class OrderViewSet(viewsets.ReadOnlyModelViewSet):
                 mark_order_paid(
                     order, manual=True,
                     user=request.user if request.user.is_authenticated else None,
-                    api_token=(request.auth if isinstance(request.auth, TeamAPIToken) else None),
+                    auth=request.auth,
                 )
             except Quota.QuotaExceededException as e:
                 return Response({'detail': str(e)}, status=status.HTTP_400_BAD_REQUEST)
@@ -127,7 +153,8 @@ class OrderViewSet(viewsets.ReadOnlyModelViewSet):
         cancel_order(
             order,
             user=request.user if request.user.is_authenticated else None,
-            api_token=(request.auth if isinstance(request.auth, TeamAPIToken) else None),
+            api_token=request.auth if isinstance(request.auth, TeamAPIToken) else None,
+            oauth_application=request.auth.application if isinstance(request.auth, OAuthAccessToken) else None,
             send_mail=send_mail
         )
         return self.retrieve(request, [], **kwargs)
@@ -148,7 +175,7 @@ class OrderViewSet(viewsets.ReadOnlyModelViewSet):
         order.log_action(
             'pretix.event.order.unpaid',
             user=request.user if request.user.is_authenticated else None,
-            api_token=(request.auth if isinstance(request.auth, TeamAPIToken) else None),
+            auth=request.auth,
         )
         return self.retrieve(request, [], **kwargs)
 
@@ -165,11 +192,26 @@ class OrderViewSet(viewsets.ReadOnlyModelViewSet):
         mark_order_expired(
             order,
             user=request.user if request.user.is_authenticated else None,
-            api_token=(request.auth if isinstance(request.auth, TeamAPIToken) else None),
+            auth=request.auth,
         )
         return self.retrieve(request, [], **kwargs)
 
-    # TODO: Find a way to implement mark_refunded
+    @detail_route(methods=['POST'])
+    def mark_refunded(self, request, **kwargs):
+        order = self.get_object()
+
+        if order.status != Order.STATUS_PAID:
+            return Response(
+                {'detail': 'The order is not paid.'},
+                status=status.HTTP_400_BAD_REQUEST
+            )
+
+        mark_order_refunded(
+            order,
+            user=request.user if request.user.is_authenticated else None,
+            api_token=(request.auth if isinstance(request.auth, TeamAPIToken) else None),
+        )
+        return self.retrieve(request, [], **kwargs)
 
     @detail_route(methods=['POST'])
     def extend(self, request, **kwargs):
@@ -204,7 +246,7 @@ class OrderViewSet(viewsets.ReadOnlyModelViewSet):
                 new_date=new_date,
                 force=force,
                 user=request.user if request.user.is_authenticated else None,
-                api_token=(request.auth if isinstance(request.auth, TeamAPIToken) else None),
+                auth=request.auth,
             )
             return self.retrieve(request, [], **kwargs)
         except OrderError as e:
@@ -213,6 +255,34 @@ class OrderViewSet(viewsets.ReadOnlyModelViewSet):
                 status=status.HTTP_400_BAD_REQUEST
             )
 
+    def create(self, request, *args, **kwargs):
+        serializer = OrderCreateSerializer(data=request.data, context=self.get_serializer_context())
+        serializer.is_valid(raise_exception=True)
+        with transaction.atomic():
+            self.perform_create(serializer)
+            order = serializer.instance
+            serializer = OrderSerializer(order, context=serializer.context)
+
+            order.log_action(
+                'pretix.event.order.placed',
+                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)
+
+        headers = self.get_success_headers(serializer.data)
+        return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
+
+    def perform_create(self, serializer):
+        serializer.save()
+
 
 class OrderPositionFilter(FilterSet):
     order = django_filters.CharFilter(name='order', lookup_expr='code__iexact')
@@ -370,7 +440,7 @@ class InvoiceViewSet(viewsets.ReadOnlyModelViewSet):
                     'invoice': inv.pk
                 },
                 user=self.request.user,
-                api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+                auth=self.request.auth,
             )
             return Response(status=204)
 
@@ -393,6 +463,6 @@ class InvoiceViewSet(viewsets.ReadOnlyModelViewSet):
                     'invoice': inv.pk
                 },
                 user=self.request.user,
-                api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+                auth=self.request.auth,
             )
             return Response(status=204)

src/pretix/api/views/organizer.py

@@ -1,5 +1,6 @@
 from rest_framework import viewsets
 
+from pretix.api.models import OAuthAccessToken
 from pretix.api.serializers.organizer import OrganizerSerializer
 from pretix.base.models import Organizer
 
@@ -14,6 +15,12 @@ class OrganizerViewSet(viewsets.ReadOnlyModelViewSet):
         if self.request.user.is_authenticated():
             if self.request.user.has_active_staff_session(self.request.session.session_key):
                 return Organizer.objects.all()
+            elif isinstance(self.request.auth, OAuthAccessToken):
+                return Organizer.objects.filter(
+                    pk__in=self.request.user.teams.values_list('organizer', flat=True)
+                ).filter(
+                    pk__in=self.request.auth.organizers.values_list('pk', flat=True)
+                )
             else:
                 return Organizer.objects.filter(pk__in=self.request.user.teams.values_list('organizer', flat=True))
         else:

src/pretix/api/views/voucher.py

@@ -9,7 +9,6 @@ from rest_framework.filters import OrderingFilter
 
 from pretix.api.serializers.voucher import VoucherSerializer
 from pretix.base.models import Voucher
-from pretix.base.models.organizer import TeamAPIToken
 
 
 class VoucherFilter(FilterSet):
@@ -51,7 +50,7 @@ class VoucherViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.voucher.added',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
 
@@ -69,7 +68,7 @@ class VoucherViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.voucher.changed',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
             data=self.request.data
         )
 
@@ -80,6 +79,6 @@ class VoucherViewSet(viewsets.ModelViewSet):
         instance.log_action(
             'pretix.voucher.deleted',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
         )
         super().perform_destroy(instance)

src/pretix/api/views/waitinglist.py

@@ -7,7 +7,7 @@ from rest_framework.filters import OrderingFilter
 from rest_framework.response import Response
 
 from pretix.api.serializers.waitinglist import WaitingListSerializer
-from pretix.base.models import TeamAPIToken, WaitingListEntry
+from pretix.base.models import WaitingListEntry
 from pretix.base.models.waitinglist import WaitingListException
 
 
@@ -45,7 +45,7 @@ class WaitingListViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.orders.waitinglist.added',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
         )
 
     def perform_update(self, serializer):
@@ -55,7 +55,7 @@ class WaitingListViewSet(viewsets.ModelViewSet):
         serializer.instance.log_action(
             'pretix.event.orders.waitinglist.changed',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
         )
 
     def perform_destroy(self, instance):
@@ -65,7 +65,7 @@ class WaitingListViewSet(viewsets.ModelViewSet):
         instance.log_action(
             'pretix.event.orders.waitinglist.deleted',
             user=self.request.user,
-            api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+            auth=self.request.auth,
         )
         super().perform_destroy(instance)
 
@@ -74,7 +74,7 @@ class WaitingListViewSet(viewsets.ModelViewSet):
         try:
             self.get_object().send_voucher(
                 user=self.request.user,
-                api_token=(self.request.auth if isinstance(self.request.auth, TeamAPIToken) else None),
+                auth=self.request.auth,
             )
         except WaitingListException as e:
             raise ValidationError(str(e))

src/pretix/base/exporters/invoices.py

@@ -38,12 +38,19 @@ class InvoiceExporter(BaseExporter):
         with tempfile.TemporaryDirectory() as d:
             with ZipFile(os.path.join(d, 'tmp.zip'), 'w') as zipf:
                 for i in qs:
-                    if not i.file:
+                    try:
+                        if not i.file:
+                            invoice_pdf_task.apply(args=(i.pk,))
+                            i.refresh_from_db()
+                        i.file.open('rb')
+                        zipf.writestr('{}.pdf'.format(i.number), i.file.read())
+                        i.file.close()
+                    except FileNotFoundError:
                         invoice_pdf_task.apply(args=(i.pk,))
                         i.refresh_from_db()
-                    i.file.open('rb')
-                    zipf.writestr('{}.pdf'.format(i.number), i.file.read())
-                    i.file.close()
+                        i.file.open('rb')
+                        zipf.writestr('{}.pdf'.format(i.number), i.file.read())
+                        i.file.close()
 
             with open(os.path.join(d, 'tmp.zip'), 'rb') as zipf:
                 return '{}_invoices.zip'.format(self.event.slug), 'application/zip', zipf.read()

src/pretix/base/exporters/json.py

@@ -24,13 +24,15 @@ class JSONExporter(BaseExporter):
                 'categories': [
                     {
                         'id': category.id,
-                        'name': str(category.name)
+                        'name': str(category.name),
+                        'internal_name': category.internal_name
                     } for category in self.event.categories.all()
                 ],
                 'items': [
                     {
                         'id': item.id,
                         'name': str(item.name),
+                        'internal_name': str(item.internal_name),
                         'category': item.category_id,
                         'price': item.default_price,
                         'tax_rate': item.tax_rule.rate if item.tax_rule else Decimal('0.00'),

src/pretix/base/forms/questions.py

@@ -242,3 +242,12 @@ class BaseInvoiceAddressForm(forms.ModelForm):
                                                      'resolve this manually.'))
         else:
             self.instance.vat_id_validated = False
+
+
+class BaseInvoiceNameForm(BaseInvoiceAddressForm):
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        for f in list(self.fields.keys()):
+            if f != 'name':
+                del self.fields[f]

src/pretix/base/invoice.py

@@ -1,3 +1,4 @@
+import logging
 from collections import defaultdict
 from decimal import Decimal
 from io import BytesIO
@@ -8,6 +9,7 @@ from django.contrib.staticfiles import finders
 from django.dispatch import receiver
 from django.utils.formats import date_format, localize
 from django.utils.translation import pgettext
+from PIL.Image import BICUBIC
 from reportlab.lib import pagesizes
 from reportlab.lib.enums import TA_LEFT
 from reportlab.lib.styles import ParagraphStyle, StyleSheet1
@@ -26,6 +28,8 @@ from pretix.base.models import Event, Invoice
 from pretix.base.signals import register_invoice_renderers
 from pretix.base.templatetags.money import money_filter
 
+logger = logging.getLogger(__name__)
+
 
 class BaseInvoiceRenderer:
     """
@@ -178,6 +182,14 @@ class BaseReportlabInvoiceRenderer(BaseInvoiceRenderer):
         return 'invoice.pdf', 'application/pdf', buffer.read()
 
 
+class ThumbnailingImageReader(ImageReader):
+    def resize(self, width, height, dpi):
+        self._image.thumbnail(
+            size=(int(width * dpi / 72), int(height * dpi / 72)),
+            resample=BICUBIC
+        )
+
+
 class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
     identifier = 'classic'
     verbose_name = pgettext('invoice', 'Classic renderer (pretix 1.0)')
@@ -276,25 +288,42 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
 
         if self.invoice.event.settings.invoice_logo_image:
             logo_file = self.invoice.event.settings.get('invoice_logo_image', binary_file=True)
-            canvas.drawImage(ImageReader(logo_file),
+            ir = ThumbnailingImageReader(logo_file)
+            try:
+                ir.resize(25 * mm, 25 * mm, 300)
+            except:
+                logger.exception("Can not resize image")
+                pass
+            canvas.drawImage(ir,
                              95 * mm, (297 - 38) * mm,
                              width=25 * mm, height=25 * mm,
                              preserveAspectRatio=True, anchor='n',
                              mask='auto')
 
+        def shorten(txt):
+            txt = str(txt)
+            p = Paragraph(txt.strip().replace('\n', '<br />\n'), style=self.stylesheet['Normal'])
+            p_size = p.wrap(65 * mm, 50 * mm)
+
+            while p_size[1] > 2 * self.stylesheet['Normal'].leading:
+                txt = ' '.join(txt.replace('…', '').split()[:-1]) + '…'
+                p = Paragraph(txt.strip().replace('\n', '<br />\n'), style=self.stylesheet['Normal'])
+                p_size = p.wrap(65 * mm, 50 * mm)
+            return txt
+
         if not self.invoice.event.has_subevents:
             if self.invoice.event.settings.show_date_to:
                 p_str = (
-                    str(self.invoice.event.name) + '\n' + pgettext('invoice', '{from_date}\nuntil {to_date}').format(
+                    shorten(self.invoice.event.name) + '\n' + pgettext('invoice', '{from_date}\nuntil {to_date}').format(
                         from_date=self.invoice.event.get_date_from_display(),
                         to_date=self.invoice.event.get_date_to_display())
                 )
             else:
                 p_str = (
-                    str(self.invoice.event.name) + '\n' + self.invoice.event.get_date_from_display()
+                    shorten(self.invoice.event.name) + '\n' + self.invoice.event.get_date_from_display()
                 )
         else:
-            p_str = str(self.invoice.event.name)
+            p_str = shorten(self.invoice.event.name)
 
         p = Paragraph(p_str.strip().replace('\n', '<br />\n'), style=self.stylesheet['Normal'])
         p.wrapOn(canvas, 65 * mm, 50 * mm)

src/pretix/base/migrations/0090_auto_20180509_0917.py

@@ -0,0 +1,29 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.11 on 2018-05-09 09:17
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('pretixbase', '0089_auto_20180315_1322'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='item',
+            name='internal_name',
+            field=models.CharField(blank=True,
+                                   help_text='If you set this, this will be used instead of the public name in the '
+                                             'backend.',
+                                   max_length=255, null=True, verbose_name='Internal name'),
+        ),
+        migrations.AddField(
+            model_name='itemcategory',
+            name='internal_name',
+            field=models.CharField(blank=True,
+                                   help_text='If you set this, this will be used instead of the public name in the backend.',
+                                   max_length=255, null=True, verbose_name='Internal name'),
+        ),
+    ]

src/pretix/base/migrations/0091_auto_20180513_1641.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.11 on 2018-05-13 16:41
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0090_auto_20180509_0917'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='order',
+            name='last_modified',
+            field=models.DateTimeField(auto_now=True, db_index=True),
+        ),
+    ]

src/pretix/base/migrations/0092_auto_20180511_1224.py

@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.11 on 2018-05-11 12:24
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('pretixbase', '0091_auto_20180513_1641'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='item',
+            name='original_price',
+            field=models.DecimalField(blank=True, decimal_places=2,
+                                      help_text='If set, this will be displayed next to the current price to show '
+                                                'that the current price is a discounted one. This is just a cosmetic '
+                                                'setting and will not actually impact pricing.',
+                                      max_digits=7, null=True, verbose_name='Original price'),
+        ),
+    ]

src/pretix/base/migrations/0093_auto_20180528_1432.py

@@ -0,0 +1,44 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.13 on 2018-05-28 14:32
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+from django.utils.crypto import get_random_string
+
+
+def set_pids(apps, schema_editor):
+    OrderPosition = apps.get_model('pretixbase', 'OrderPosition')  # noqa
+    taken = set()
+    charset = list('ABCDEFGHJKLMNPQRSTUVWXYZ3789')
+    for op in OrderPosition.objects.iterator():
+        while True:
+            code = get_random_string(length=10, allowed_chars=charset)
+            if code not in taken:
+                op.pseudonymization_id = code
+                taken.add(code)
+                break
+        op.save(update_fields=['pseudonymization_id'])
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('pretixbase', '0092_auto_20180511_1224'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='orderposition',
+            name='pseudonymization_id',
+            field=models.CharField(db_index=True, max_length=16, null=True, unique=True),
+        ),
+        migrations.RunPython(
+            set_pids,
+            migrations.RunPython.noop,
+        ),
+        migrations.AlterField(
+            model_name='orderposition',
+            name='pseudonymization_id',
+            field=models.CharField(db_index=True, default='', max_length=16, unique=True),
+            preserve_default=False,
+        ),
+    ]

src/pretix/base/migrations/0094_auto_20180604_1119.py

@@ -0,0 +1,15 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.13 on 2018-06-04 11:19
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('pretixbase', '0093_auto_20180528_1432'),
+        ('pretixapi', '0001_initial')
+    ]
+
+    operations = [
+    ]

src/pretix/base/migrations/0095_auto_20180604_1129.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.13 on 2018-06-04 11:29
+from __future__ import unicode_literals
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('pretixbase', '0094_auto_20180604_1119'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='logentry',
+            name='oauth_application',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT,
+                                    to='pretixapi.OAuthApplication'),
+        ),
+    ]

src/pretix/base/models/auth.py

@@ -25,13 +25,13 @@ class UserManager(BaseUserManager):
     model documentation to see what's so special about our user model.
     """
 
-    def create_user(self, email: str, password: str=None, **kwargs):
+    def create_user(self, email: str, password: str = None, **kwargs):
         user = self.model(email=email, **kwargs)
         user.set_password(password)
         user.save()
         return user
 
-    def create_superuser(self, email: str, password: str=None):  # NOQA
+    def create_superuser(self, email: str, password: str = None):  # NOQA
         # Not used in the software but required by Django
         if password is None:
             raise Exception("You must provide a password")
@@ -93,7 +93,7 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
                                 verbose_name=_('Timezone'))
     require_2fa = models.BooleanField(
         default=False,
-        verbose_name=_('Two-factor authentification is required to log in')
+        verbose_name=_('Two-factor authentication is required to log in')
     )
     notifications_send = models.BooleanField(
         default=True,

src/pretix/base/models/base.py

@@ -36,7 +36,7 @@ def cached_file_delete(sender, instance, **kwargs):
 
 class LoggingMixin:
 
-    def log_action(self, action, data=None, user=None, api_token=None, save=True):
+    def log_action(self, action, data=None, user=None, api_token=None, auth=None, save=True):
         """
         Create a LogEntry object that is related to this object.
         See the LogEntry documentation for details.
@@ -47,6 +47,8 @@ class LoggingMixin:
         """
         from .log import LogEntry
         from .event import Event
+        from pretix.api.models import OAuthAccessToken, OAuthApplication
+        from .organizer import TeamAPIToken
         from ..notifications import get_all_notification_types
         from ..services.notifications import notify
 
@@ -57,7 +59,18 @@ class LoggingMixin:
             event = self.event
         if user and not user.is_authenticated:
             user = None
-        logentry = LogEntry(content_object=self, user=user, action_type=action, event=event, api_token=api_token)
+
+        kwargs = {}
+        if isinstance(auth, OAuthAccessToken):
+            kwargs['oauth_application'] = auth.application
+        elif isinstance(auth, OAuthApplication):
+            kwargs['oauth_application'] = auth
+        elif isinstance(auth, TeamAPIToken):
+            kwargs['api_token'] = auth
+        elif isinstance(api_token, TeamAPIToken):
+            kwargs['api_token'] = api_token
+
+        logentry = LogEntry(content_object=self, user=user, action_type=action, event=event, **kwargs)
         if data:
             logentry.data = json.dumps(data, cls=CustomJSONEncoder)
         if save:
@@ -83,4 +96,4 @@ class LoggedModel(models.Model, LoggingMixin):
 
         return LogEntry.objects.filter(
             content_type=ContentType.objects.get_for_model(type(self)), object_id=self.pk
-        ).select_related('user', 'event')
+        ).select_related('user', 'event', 'oauth_application', 'api_token')

src/pretix/base/models/checkin.py

@@ -168,3 +168,11 @@ class Checkin(models.Model):
         return "<Checkin: pos {} on list '{}' at {}>".format(
             self.position, self.list, self.datetime
         )
+
+    def save(self, **kwargs):
+        self.position.order.touch()
+        super().save(**kwargs)
+
+    def delete(self, **kwargs):
+        self.position.order.touch()
+        super().delete(**kwargs)

src/pretix/base/models/event.py

@@ -2,6 +2,7 @@ import string
 import uuid
 from collections import OrderedDict
 from datetime import datetime, time
+from operator import attrgetter
 
 import pytz
 from django.conf import settings
@@ -535,6 +536,23 @@ class Event(EventMixin, LoggedModel):
             )
         ).order_by('date_from', 'name')
 
+    @property
+    def subevent_list_subevents(self):
+        ordering = self.settings.get('frontpage_subevent_ordering', default='date_ascending', as_type=str)
+        orderfields = {
+            'date_ascending': ('date_from', 'name'),
+            'date_descending': ('-date_from', 'name'),
+            'name_ascending': ('name', 'date_from'),
+            'name_descending': ('-name', 'date_from'),
+        }[ordering]
+        subevs = self.subevents.filter(
+            Q(active=True) & (
+                Q(Q(date_to__isnull=True) & Q(date_from__gte=now()))
+                | Q(date_to__gte=now())
+            )
+        )  # order_by doesn't make sense with I18nField
+        return sorted(subevs, key=attrgetter(*orderfields))
+
     @property
     def meta_data(self):
         data = {p.name: p.default for p in self.organizer.meta_properties.all()}
@@ -545,7 +563,7 @@ 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 != 'free':
+            if provider.is_enabled and provider.identifier not in ('free', 'boxoffice'):
                 result = True
                 break
         return result

src/pretix/base/models/items.py

@@ -43,6 +43,11 @@ class ItemCategory(LoggedModel):
         max_length=255,
         verbose_name=_("Category name"),
     )
+    internal_name = models.CharField(
+        verbose_name=_("Internal name"),
+        help_text=_("If you set this, this will be used instead of the public name in the backend."),
+        blank=True, null=True, max_length=255
+    )
     description = I18nTextField(
         blank=True, verbose_name=_("Category description")
     )
@@ -63,9 +68,10 @@ class ItemCategory(LoggedModel):
         ordering = ('position', 'id')
 
     def __str__(self):
+        name = self.internal_name or self.name
         if self.is_addon:
-            return _('{category} (Add-On products)').format(category=str(self.name))
-        return str(self.name)
+            return _('{category} (Add-On products)').format(category=str(name))
+        return str(name)
 
     def delete(self, *args, **kwargs):
         super().delete(*args, **kwargs)
@@ -185,6 +191,8 @@ class Item(LoggedModel):
     :type min_per_order: int
     :param checkin_attention: Requires special attention at check-in
     :type checkin_attention: bool
+    :param original_price: The item's "original" price. Will not be used for any calculations, will just be shown.
+    :type original_price: decimal.Decimal
     """
 
     event = models.ForeignKey(
@@ -205,6 +213,11 @@ class Item(LoggedModel):
         max_length=255,
         verbose_name=_("Item name"),
     )
+    internal_name = models.CharField(
+        verbose_name=_("Internal name"),
+        help_text=_("If you set this, this will be used instead of the public name in the backend."),
+        blank=True, null=True, max_length=255
+    )
     active = models.BooleanField(
         default=True,
         verbose_name=_("Active"),
@@ -300,8 +313,15 @@ class Item(LoggedModel):
                     'attention. You can use this for example for student tickets to indicate to the person at '
                     'check-in that the student ID card still needs to be checked.')
     )
+    original_price = models.DecimalField(
+        verbose_name=_('Original price'),
+        blank=True, null=True,
+        max_digits=7, decimal_places=2,
+        help_text=_('If set, this will be displayed next to the current price to show that the current price is a '
+                    'discounted one. This is just a cosmetic setting and will not actually impact pricing.')
+    )
     # !!! Attention: If you add new fields here, also add them to the copying code in
-    # pretix/control/views/item.py if applicable.
+    # pretix/control/forms/item.py if applicable.
 
     class Meta:
         verbose_name = _("Product")
@@ -309,7 +329,7 @@ class Item(LoggedModel):
         ordering = ("category__position", "category", "position")
 
     def __str__(self):
-        return str(self.name)
+        return str(self.internal_name or self.name)
 
     def save(self, *args, **kwargs):
         super().save(*args, **kwargs)
@@ -991,7 +1011,7 @@ class Quota(LoggedModel):
             self.cached_availability_number = res[1]
             self.cached_availability_time = now_dt
             if self.size is None:
-                self.cached_availability_paid_orders = self.count_pending_orders()
+                self.cached_availability_paid_orders = self.count_paid_orders()
             self.save(
                 update_fields=[
                     'cached_availability_state', 'cached_availability_number', 'cached_availability_time',

src/pretix/base/models/log.py

@@ -41,6 +41,7 @@ class LogEntry(models.Model):
     datetime = models.DateTimeField(auto_now_add=True, db_index=True)
     user = models.ForeignKey('User', null=True, blank=True, on_delete=models.PROTECT)
     api_token = models.ForeignKey('TeamAPIToken', null=True, blank=True, on_delete=models.PROTECT)
+    oauth_application = models.ForeignKey('pretixapi.OAuthApplication', null=True, blank=True, on_delete=models.PROTECT)
     event = models.ForeignKey('Event', null=True, blank=True, on_delete=models.SET_NULL)
     action_type = models.CharField(max_length=255)
     data = models.TextField(default='{}')

src/pretix/base/models/orders.py

@@ -2,7 +2,7 @@ import copy
 import json
 import os
 import string
-from datetime import datetime, time
+from datetime import datetime, time, timedelta
 from decimal import Decimal
 from typing import Any, Dict, List, Union
 
@@ -180,6 +180,9 @@ class Order(LoggedModel):
         verbose_name=_("Meta information"),
         null=True, blank=True
     )
+    last_modified = models.DateTimeField(
+        auto_now=True, db_index=True
+    )
 
     class Meta:
         verbose_name = _("Order")
@@ -208,12 +211,48 @@ class Order(LoggedModel):
     def changable(self):
         return self.status in (Order.STATUS_PAID, Order.STATUS_PENDING)
 
-    def save(self, *args, **kwargs):
+    def save(self, **kwargs):
+        if 'update_fields' in kwargs and 'last_modified' not in kwargs['update_fields']:
+            kwargs['update_fields'] = list(kwargs['update_fields']) + ['last_modified']
         if not self.code:
             self.assign_code()
         if not self.datetime:
             self.datetime = now()
-        super().save(*args, **kwargs)
+        if not self.expires:
+            self.set_expires()
+        super().save(**kwargs)
+
+    def touch(self):
+        self.save(update_fields=['last_modified'])
+
+    def set_expires(self, now_dt=None, subevents=None):
+        now_dt = now_dt or now()
+        tz = pytz.timezone(self.event.settings.timezone)
+        exp_by_date = now_dt.astimezone(tz) + timedelta(days=self.event.settings.get('payment_term_days', as_type=int))
+        exp_by_date = exp_by_date.astimezone(tz).replace(hour=23, minute=59, second=59, microsecond=0)
+        if self.event.settings.get('payment_term_weekdays'):
+            if exp_by_date.weekday() == 5:
+                exp_by_date += timedelta(days=2)
+            elif exp_by_date.weekday() == 6:
+                exp_by_date += timedelta(days=1)
+
+        self.expires = exp_by_date
+
+        term_last = self.event.settings.get('payment_term_last', as_type=RelativeDateWrapper)
+        if term_last:
+            if self.event.has_subevents and subevents:
+                term_last = min([
+                    term_last.datetime(se).date()
+                    for se in subevents
+                ])
+            else:
+                term_last = term_last.datetime(self.event).date()
+            term_last = make_aware(datetime.combine(
+                term_last,
+                time(hour=23, minute=59, second=59)
+            ), tz)
+            if term_last < self.expires:
+                self.expires = term_last
 
     @cached_property
     def tax_total(self):
@@ -547,8 +586,15 @@ class QuestionAnswer(models.Model):
     def save(self, *args, **kwargs):
         if self.orderposition and self.cartposition:
             raise ValueError('QuestionAnswer cannot be linked to an order and a cart position at the same time.')
+        if self.orderposition:
+            self.orderposition.order.touch()
         super().save(*args, **kwargs)
 
+    def delete(self, **kwargs):
+        if self.orderposition:
+            self.orderposition.order.touch()
+        super().delete(**kwargs)
+
 
 class AbstractPosition(models.Model):
     """
@@ -751,8 +797,13 @@ class OrderFee(models.Model):
     def save(self, *args, **kwargs):
         if self.tax_rate is None:
             self._calculate_tax()
+        self.order.touch()
         return super().save(*args, **kwargs)
 
+    def delete(self, **kwargs):
+        self.order.touch()
+        super().delete(**kwargs)
+
 
 class OrderPosition(AbstractPosition):
     """
@@ -784,6 +835,11 @@ class OrderPosition(AbstractPosition):
         verbose_name=_('Tax value')
     )
     secret = models.CharField(max_length=64, default=generate_position_secret, db_index=True)
+    pseudonymization_id = models.CharField(
+        max_length=16,
+        unique=True,
+        db_index=True
+    )
 
     class Meta:
         verbose_name = _("Order position")
@@ -861,11 +917,28 @@ class OrderPosition(AbstractPosition):
     def save(self, *args, **kwargs):
         if self.tax_rate is None:
             self._calculate_tax()
+        self.order.touch()
         if self.pk is None:
             while OrderPosition.objects.filter(secret=self.secret).exists():
                 self.secret = generate_position_secret()
+
+        if not self.pseudonymization_id:
+            self.assign_pseudonymization_id()
+
         return super().save(*args, **kwargs)
 
+    def assign_pseudonymization_id(self):
+        # This omits some character pairs completely because they are hard to read even on screens (1/I and O/0)
+        # and includes only one of two characters for some pairs because they are sometimes hard to distinguish in
+        # 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')
+        while True:
+            code = get_random_string(length=10, allowed_chars=charset)
+            if not OrderPosition.objects.filter(pseudonymization_id=code).exists():
+                self.pseudonymization_id = code
+                return
+
 
 class CartPosition(AbstractPosition):
     """
@@ -945,6 +1018,11 @@ class InvoiceAddress(models.Model):
         blank=True
     )
 
+    def save(self, **kwargs):
+        if self.order:
+            self.order.touch()
+        super().save(**kwargs)
+
 
 def cachedticket_name(instance, filename: str) -> str:
     secret = get_random_string(length=16, allowed_chars=string.ascii_letters + string.digits)

src/pretix/base/models/organizer.py

@@ -137,7 +137,9 @@ class Team(LoggedModel):
     )
     can_change_organizer_settings = models.BooleanField(
         default=False,
-        verbose_name=_("Can change organizer settings")
+        verbose_name=_("Can change organizer settings"),
+        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_change_event_settings = models.BooleanField(

src/pretix/base/models/tax.py

@@ -160,18 +160,19 @@ class TaxRule(LoggedModel):
 
     def get_matching_rule(self, invoice_address):
         rules = json.loads(self.custom_rules)
-        for r in rules:
-            if r['country'] == 'EU' and str(invoice_address.country) not in EU_COUNTRIES:
-                continue
-            if r['country'] not in ('ZZ', 'EU') and r['country'] != str(invoice_address.country):
-                continue
-            if r['address_type'] == 'individual' and invoice_address.is_business:
-                continue
-            if r['address_type'] in ('business', 'business_vat_id') and not invoice_address.is_business:
-                continue
-            if r['address_type'] == 'business_vat_id' and (not invoice_address.vat_id or not invoice_address.vat_id_validated):
-                continue
-            return r
+        if invoice_address:
+            for r in rules:
+                if r['country'] == 'EU' and str(invoice_address.country) not in EU_COUNTRIES:
+                    continue
+                if r['country'] not in ('ZZ', 'EU') and r['country'] != str(invoice_address.country):
+                    continue
+                if r['address_type'] == 'individual' and invoice_address.is_business:
+                    continue
+                if r['address_type'] in ('business', 'business_vat_id') and not invoice_address.is_business:
+                    continue
+                if r['address_type'] == 'business_vat_id' and (not invoice_address.vat_id or not invoice_address.vat_id_validated):
+                    continue
+                return r
         return {'action': 'vat'}
 
     def is_reverse_charge(self, invoice_address):

src/pretix/base/models/waitinglist.py

@@ -77,7 +77,7 @@ class WaitingListEntry(LoggedModel):
         WaitingListEntry.clean_itemvar(self.event, self.item, self.variation)
         WaitingListEntry.clean_subevent(self.event, self.subevent)
 
-    def send_voucher(self, quota_cache=None, user=None, api_token=None):
+    def send_voucher(self, quota_cache=None, user=None, auth=None):
         availability = (
             self.variation.check_quotas(count_waitinglist=False, subevent=self.subevent, _cache=quota_cache)
             if self.variation
@@ -114,8 +114,8 @@ class WaitingListEntry(LoggedModel):
                 'email': self.email,
                 'waitinglistentry': self.pk,
                 'subevent': self.subevent.pk if self.subevent else None,
-            }, user=user, api_token=api_token)
-            self.log_action('pretix.waitinglist.voucher', user=user, api_token=api_token)
+            }, user=user, auth=auth)
+            self.log_action('pretix.waitinglist.voucher', user=user, auth=auth)
             self.voucher = v
             self.save()
 

src/pretix/base/payment.py

@@ -658,6 +658,39 @@ class FreeOrderProvider(BasePaymentProvider):
         return False
 
 
+class BoxOfficeProvider(BasePaymentProvider):
+    is_implicit = True
+    is_enabled = True
+    identifier = "boxoffice"
+    verbose_name = _("Box office")
+
+    def payment_perform(self, request: HttpRequest, order: Order):
+        from pretix.base.services.orders import mark_order_paid
+        try:
+            mark_order_paid(order, 'boxoffice', send_mail=False)
+        except Quota.QuotaExceededException as e:
+            raise PaymentException(str(e))
+
+    @property
+    def settings_form_fields(self) -> dict:
+        return {}
+
+    def order_control_refund_render(self, order: Order) -> str:
+        return ''
+
+    def order_control_refund_perform(self, request: HttpRequest, order: Order) -> Union[bool, str]:
+        from pretix.base.services.orders import mark_order_refunded
+
+        mark_order_refunded(order, user=request.user)
+        messages.success(request, _('The order has been marked as refunded.'))
+
+    def is_allowed(self, request: HttpRequest) -> bool:
+        return False
+
+    def order_change_allowed(self, order: Order) -> bool:
+        return False
+
+
 @receiver(register_payment_providers, dispatch_uid="payment_free")
 def register_payment_provider(sender, **kwargs):
-    return FreeOrderProvider
+    return [FreeOrderProvider, BoxOfficeProvider]

src/pretix/base/pdf.py

@@ -46,7 +46,7 @@ DEFAULT_VARIABLES = OrderedDict((
     ("item", {
         "label": _("Product name"),
         "editor_sample": _("Sample product"),
-        "evaluate": lambda orderposition, order, event: str(orderposition.item)
+        "evaluate": lambda orderposition, order, event: str(orderposition.item.name)
     }),
     ("variation", {
         "label": _("Variation name"),
@@ -62,8 +62,8 @@ DEFAULT_VARIABLES = OrderedDict((
         "label": _("Product name and variation"),
         "editor_sample": _("Sample product – sample variation"),
         "evaluate": lambda orderposition, order, event: (
-            '{} - {}'.format(orderposition.item, orderposition.variation)
-            if orderposition.variation else str(orderposition.item)
+            '{} - {}'.format(orderposition.item.name, orderposition.variation)
+            if orderposition.variation else str(orderposition.item.name)
         )
     }),
     ("item_category", {
@@ -148,12 +148,12 @@ 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') else ''
+        "evaluate": lambda op, order, ev: 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') else ''
+        "evaluate": lambda op, order, ev: order.invoice_address.company if getattr(order, 'invoice_address', None) else ''
     }),
     ("addons", {
         "label": _("List of Add-Ons"),
@@ -211,16 +211,25 @@ class Renderer:
                 pdfmetrics.registerFont(TTFont(family + ' B I', finders.find(styles['bolditalic']['truetype'])))
 
     def _draw_barcodearea(self, canvas: Canvas, op: OrderPosition, o: dict):
+        content = o.get('content', 'secret')
+        if content == 'secret':
+            content = op.secret
+        elif content == 'pseudonymization_id':
+            content = op.pseudonymization_id
+
         reqs = float(o['size']) * mm
-        qrw = QrCodeWidget(op.secret, barLevel='H', barHeight=reqs, barWidth=reqs)
+        qrw = QrCodeWidget(content, barLevel='H', barHeight=reqs, barWidth=reqs)
         d = Drawing(reqs, reqs)
         d.add(qrw)
         qr_x = float(o['left']) * mm
         qr_y = float(o['bottom']) * mm
         renderPDF.draw(d, canvas, qr_x, qr_y)
 
+    def _get_ev(self, op, order):
+        return op.subevent or order.event
+
     def _get_text_content(self, op: OrderPosition, order: Order, o: dict):
-        ev = op.subevent or order.event
+        ev = self._get_ev(op, order)
         if not o['content']:
             return '(error)'
         if o['content'] == 'other':

src/pretix/base/services/cart.py

@@ -10,7 +10,7 @@ from django.dispatch import receiver
 from django.utils.timezone import now
 from django.utils.translation import pgettext_lazy, ugettext as _
 
-from pretix.base.i18n import LazyLocaleException, language
+from pretix.base.i18n import language
 from pretix.base.models import (
     CartPosition, Event, InvoiceAddress, Item, ItemVariation, Voucher,
 )
@@ -27,8 +27,16 @@ from pretix.presale.signals import (
 )
 
 
-class CartError(LazyLocaleException):
-    pass
+class CartError(Exception):
+    def __init__(self, *args):
+        msg = args[0]
+        msgargs = args[1] if len(args) > 1 else None
+        self.args = args
+        if msgargs:
+            msg = _(msg) % msgargs
+        else:
+            msg = _(msg)
+        super().__init__(msg)
 
 
 error_messages = {

src/pretix/base/services/invoices.py

@@ -39,7 +39,10 @@ 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)
-        payment = payment_provider.render_invoice_text(invoice.order)
+        if payment_provider:
+            payment = payment_provider.render_invoice_text(invoice.order)
+        else:
+            payment = ""
 
         invoice.introductory_text = str(introductory).replace('\n', '<br />')
         invoice.additional_text = str(additional).replace('\n', '<br />')
@@ -171,6 +174,7 @@ def generate_cancellation(invoice: Invoice, trigger_pdf=True):
     cancellation.is_cancellation = True
     cancellation.date = timezone.now().date()
     cancellation.payment_provider_text = ''
+    cancellation.file = None
     cancellation.save()
 
     cancellation = build_cancellation(cancellation)

src/pretix/base/services/orders.py

@@ -13,9 +13,10 @@ from django.db import transaction
 from django.db.models import F, Max, Q, Sum
 from django.dispatch import receiver
 from django.utils.formats import date_format
-from django.utils.timezone import make_aware, now
+from django.utils.timezone import now
 from django.utils.translation import ugettext as _
 
+from pretix.api.models import OAuthApplication
 from pretix.base.i18n import (
     LazyCurrencyNumber, LazyDate, LazyLocaleException, LazyNumber, language,
 )
@@ -31,7 +32,6 @@ from pretix.base.models.orders import (
 from pretix.base.models.organizer import TeamAPIToken
 from pretix.base.models.tax import TaxedPrice
 from pretix.base.payment import BasePaymentProvider
-from pretix.base.reldate import RelativeDateWrapper
 from pretix.base.services.async import ProfiledTask
 from pretix.base.services.invoices import (
     generate_cancellation, generate_invoice, invoice_qualified,
@@ -81,7 +81,7 @@ logger = logging.getLogger(__name__)
 
 def mark_order_paid(order: Order, provider: str=None, info: str=None, date: datetime=None, manual: bool=None,
                     force: bool=False, send_mail: bool=True, user: User=None, mail_text='',
-                    count_waitinglist=True, api_token=None) -> Order:
+                    count_waitinglist=True, auth=None) -> Order:
     """
     Marks an order as paid. This sets the payment provider, info and date and returns
     the order object.
@@ -124,7 +124,7 @@ def mark_order_paid(order: Order, provider: str=None, info: str=None, date: date
         'date': date or now_dt,
         'manual': manual,
         'force': force
-    }, user=user, api_token=api_token)
+    }, user=user, auth=auth)
     order_paid.send(order.event, order=order)
 
     invoice = None
@@ -174,7 +174,7 @@ def mark_order_paid(order: Order, provider: str=None, info: str=None, date: date
     return order
 
 
-def extend_order(order: Order, new_date: datetime, force: bool=False, user: User=None, api_token=None):
+def extend_order(order: Order, new_date: datetime, force: bool=False, user: User=None, auth=None):
     """
     Extends the deadline of an order. If the order is already expired, the quota will be checked to
     see if this is actually still possible. If ``force`` is set to ``True``, the result of this check
@@ -188,7 +188,7 @@ def extend_order(order: Order, new_date: datetime, force: bool=False, user: User
         order.log_action(
             'pretix.event.order.expirychanged',
             user=user,
-            api_token=api_token,
+            auth=auth,
             data={
                 'expires': order.expires,
                 'state_change': False
@@ -204,7 +204,7 @@ def extend_order(order: Order, new_date: datetime, force: bool=False, user: User
                 order.log_action(
                     'pretix.event.order.expirychanged',
                     user=user,
-                    api_token=api_token,
+                    auth=auth,
                     data={
                         'expires': order.expires,
                         'state_change': True
@@ -215,7 +215,7 @@ def extend_order(order: Order, new_date: datetime, force: bool=False, user: User
 
 
 @transaction.atomic
-def mark_order_refunded(order, user=None):
+def mark_order_refunded(order, user=None, api_token=None):
     """
     Mark this order as refunded. This sets the payment status and returns the order object.
     :param order: The order to change
@@ -229,7 +229,7 @@ def mark_order_refunded(order, user=None):
         order.status = Order.STATUS_REFUNDED
         order.save()
 
-    order.log_action('pretix.event.order.refunded', user=user)
+    order.log_action('pretix.event.order.refunded', user=user, api_token=api_token)
     i = order.invoices.filter(is_cancellation=False).last()
     if i:
         generate_cancellation(i)
@@ -238,24 +238,21 @@ def mark_order_refunded(order, user=None):
 
 
 @transaction.atomic
-def mark_order_expired(order, user=None, api_token=None):
+def mark_order_expired(order, user=None, auth=None):
     """
     Mark this order as expired. This sets the payment status and returns the order object.
     :param order: The order to change
     :param user: The user that performed the change
-    :param api_token: The API token used to performed the change
     """
     if isinstance(order, int):
         order = Order.objects.get(pk=order)
     if isinstance(user, int):
         user = User.objects.get(pk=user)
-    if isinstance(api_token, int):
-        api_token = TeamAPIToken.objects.get(pk=api_token)
     with order.event.lock():
         order.status = Order.STATUS_EXPIRED
         order.save()
 
-    order.log_action('pretix.event.order.expired', user=user, api_token=api_token)
+    order.log_action('pretix.event.order.expired', user=user, auth=auth)
     i = order.invoices.filter(is_cancellation=False).last()
     if i:
         generate_cancellation(i)
@@ -264,7 +261,7 @@ def mark_order_expired(order, user=None, api_token=None):
 
 
 @transaction.atomic
-def _cancel_order(order, user=None, send_mail: bool=True, api_token=None):
+def _cancel_order(order, user=None, send_mail: bool=True, api_token=None, oauth_application=None):
     """
     Mark this order as canceled
     :param order: The order to change
@@ -276,13 +273,15 @@ def _cancel_order(order, user=None, send_mail: bool=True, api_token=None):
         user = User.objects.get(pk=user)
     if isinstance(api_token, int):
         api_token = TeamAPIToken.objects.get(pk=api_token)
+    if isinstance(oauth_application, int):
+        oauth_application = OAuthApplication.objects.get(pk=oauth_application)
     with order.event.lock():
         if not order.cancel_allowed():
             raise OrderError(_('You cannot cancel this order.'))
         order.status = Order.STATUS_CANCELED
         order.save()
 
-    order.log_action('pretix.event.order.canceled', user=user, api_token=api_token)
+    order.log_action('pretix.event.order.canceled', user=user, auth=api_token or oauth_application)
     i = order.invoices.filter(is_cancellation=False).last()
     if i:
         generate_cancellation(i)
@@ -301,8 +300,8 @@ def _cancel_order(order, user=None, send_mail: bool=True, api_token=None):
                 'secret': order.secret
             })
         }
-        email_subject = _('Order canceled: %(code)s') % {'code': order.code}
         with language(order.locale):
+            email_subject = _('Order canceled: %(code)s') % {'code': order.code}
             try:
                 order.send_mail(
                     email_subject, email_template, email_context,
@@ -448,50 +447,22 @@ def _get_fees(positions: List[CartPosition], payment_provider: BasePaymentProvid
 def _create_order(event: Event, email: str, positions: List[CartPosition], now_dt: datetime,
                   payment_provider: BasePaymentProvider, locale: str=None, address: InvoiceAddress=None,
                   meta_info: dict=None):
-    from datetime import time
-
     fees = _get_fees(positions, payment_provider, address, meta_info, event)
     total = sum([c.price for c in positions]) + sum([c.value for c in fees])
 
-    tz = pytz.timezone(event.settings.timezone)
-    exp_by_date = now_dt.astimezone(tz) + timedelta(days=event.settings.get('payment_term_days', as_type=int))
-    exp_by_date = exp_by_date.astimezone(tz).replace(hour=23, minute=59, second=59, microsecond=0)
-    if event.settings.get('payment_term_weekdays'):
-        if exp_by_date.weekday() == 5:
-            exp_by_date += timedelta(days=2)
-        elif exp_by_date.weekday() == 6:
-            exp_by_date += timedelta(days=1)
-
-    expires = exp_by_date
-
-    term_last = event.settings.get('payment_term_last', as_type=RelativeDateWrapper)
-    if term_last:
-        if event.has_subevents:
-            term_last = min([
-                term_last.datetime(se).date()
-                for se in event.subevents.filter(id__in=[p.subevent_id for p in positions])
-            ])
-        else:
-            term_last = term_last.datetime(event).date()
-        term_last = make_aware(datetime.combine(
-            term_last,
-            time(hour=23, minute=59, second=59)
-        ), tz)
-        if term_last < expires:
-            expires = term_last
-
     with transaction.atomic():
-        order = Order.objects.create(
+        order = Order(
             status=Order.STATUS_PENDING,
             event=event,
             email=email,
             datetime=now_dt,
-            expires=expires,
             locale=locale,
             total=total,
             payment_provider=payment_provider.identifier,
             meta_info=json.dumps(meta_info or {}),
         )
+        order.set_expires(now_dt, event.subevents.filter(id__in=[p.subevent_id for p in positions]))
+        order.save()
 
         if address:
             if address.order is not None:
@@ -510,6 +481,9 @@ def _create_order(event: Event, email: str, positions: List[CartPosition], now_d
 
         OrderPosition.transform_cart_positions(positions, order)
         order.log_action('pretix.event.order.placed')
+        if meta_info:
+            for msg in meta_info.get('confirm_messages', []):
+                order.log_action('pretix.event.order.consent', data={'msg': msg})
 
     order_placed.send(event, order=order)
     return order
@@ -705,7 +679,7 @@ class OrderChangeManager:
                                    'no quota is available.'),
         'paid_price_change': _('Currently, paid orders can only be changed in a way that does not change the total '
                                'price of the order as partial payments or refunds are not yet supported.'),
-        'addon_to_required': _('This is an addon product, please select the base position it should be added to.'),
+        'addon_to_required': _('This is an add-on product, please select the base position it should be added to.'),
         'addon_invalid': _('The selected base position does not allow you to add this product as an add-on.'),
         'subevent_required': _('You need to choose a subevent for the new position.'),
     }
@@ -715,6 +689,7 @@ class OrderChangeManager:
     CancelOperation = namedtuple('CancelOperation', ('position',))
     AddOperation = namedtuple('AddOperation', ('item', 'variation', 'price', 'addon_to', 'subevent'))
     SplitOperation = namedtuple('SplitOperation', ('position',))
+    RegenerateSecretOperation = namedtuple('RegenerateSecretOperation', ('position',))
 
     def __init__(self, order: Order, user, notify=True):
         self.order = order
@@ -770,6 +745,9 @@ class OrderChangeManager:
         self._quotadiff.subtract(position.quotas)
         self._operations.append(self.SubeventOperation(position, subevent, price))
 
+    def regenerate_secret(self, position: OrderPosition):
+        self._operations.append(self.RegenerateSecretOperation(position))
+
     def change_price(self, position: OrderPosition, price: Decimal):
         price = position.item.tax(price)
 
@@ -976,6 +954,15 @@ class OrderChangeManager:
                 })
             elif isinstance(op, self.SplitOperation):
                 split_positions.append(op.position)
+            elif isinstance(op, self.RegenerateSecretOperation):
+                op.position.secret = generate_position_secret()
+                op.position.save()
+                CachedTicket.objects.filter(order_position__order=self.order).delete()
+                CachedCombinedTicket.objects.filter(order=self.order).delete()
+                self.order.log_action('pretix.event.order.changed.secret', user=self.user, data={
+                    'position': op.position.pk,
+                    'positionid': op.position.positionid,
+                })
 
         if split_positions:
             self.split_order = self._create_split_order(split_positions)
@@ -1140,6 +1127,7 @@ class OrderChangeManager:
             self._recalculate_total_and_payment_fee()
             self._reissue_invoice()
             self._clear_tickets_cache()
+            self.order.touch()
         self._check_paid_to_free()
 
         if self.notify:
@@ -1175,10 +1163,10 @@ def perform_order(self, event: str, payment_provider: str, positions: List[str],
 
 
 @app.task(base=ProfiledTask, bind=True, max_retries=5, default_retry_delay=1, throws=(OrderError,))
-def cancel_order(self, order: int, user: int=None, send_mail: bool=True, api_token=None):
+def cancel_order(self, order: int, user: int=None, send_mail: bool=True, api_token=None, oauth_application=None):
     try:
         try:
-            return _cancel_order(order, user, send_mail, api_token)
+            return _cancel_order(order, user, send_mail, api_token, oauth_application)
         except LockTimeoutException:
             self.retry()
     except (MaxRetriesExceededError, LockTimeoutException):

src/pretix/base/services/stats.py

@@ -11,7 +11,8 @@ from pretix.base.signals import order_fee_type_name
 
 
 class DummyObject:
-    pass
+    def __str__(self):
+        return str(self.name)
 
 
 class Dontsum:

src/pretix/base/settings.py

@@ -495,6 +495,10 @@ Your {event} team"""))
         'default': '',
         'type': LazyI18nString
     },
+    'frontpage_subevent_ordering': {
+        'default': 'date_ascending',
+        'type': str
+    },
 }
 
 settings_hierarkey = Hierarkey(attribute_name='settings')

src/pretix/base/shredder.py

@@ -33,7 +33,7 @@ def shred_constraints(event: Event):
             max_to=Max('date_to'),
             max_fromto=Greatest(Max('date_to'), Max('date_from'))
         )
-        max_date = max_date['max_fromto'] or max_date['max_to'] or max_date['max_From']
+        max_date = max_date['max_fromto'] or max_date['max_to'] or max_date['max_from']
         if max_date > now() - timedelta(days=60):
             return _('Your event needs to be over for at least 60 days to use this feature.')
     else:
@@ -74,6 +74,13 @@ class BaseDataShredder:
         """
         raise NotImplementedError()  # NOQA
 
+    @property
+    def tax_relevant(self):
+        """
+        Indicates whether this removes potentially tax-relevant data.
+        """
+        return False
+
     @property
     def verbose_name(self) -> str:
         """
@@ -216,6 +223,7 @@ class AttendeeNameShredder(BaseDataShredder):
 class InvoiceAddressShredder(BaseDataShredder):
     verbose_name = _('Invoice addresses')
     identifier = 'invoice_addresses'
+    tax_relevant = True
     description = _('This will remove all invoice addresses from orders, as well as logged changes to them.')
 
     def generate_files(self) -> List[Tuple[str, str, str]]:
@@ -269,6 +277,7 @@ class QuestionAnswerShredder(BaseDataShredder):
 class InvoiceShredder(BaseDataShredder):
     verbose_name = _('Invoices')
     identifier = 'invoices'
+    tax_relevant = True
     description = _('This will remove all invoice PDFs, as well as any of their text content that might contain '
                     'personal data from the database. Invoice numbers and totals will be conserved.')
 
@@ -312,6 +321,7 @@ class CachedTicketShredder(BaseDataShredder):
 class PaymentInfoShredder(BaseDataShredder):
     verbose_name = _('Payment information')
     identifier = 'payment_info'
+    tax_relevant = True
     description = _('This will remove payment-related information. Depending on the payment method, all data will be '
                     'removed or personal data only. No download will be offered.')
 

src/pretix/base/views/cachedfiles.py

@@ -1,9 +1,10 @@
-from django.http import FileResponse, Http404, HttpRequest, HttpResponse
+from django.http import Http404, HttpRequest, HttpResponse
 from django.shortcuts import get_object_or_404
 from django.utils.functional import cached_property
 from django.views.generic import TemplateView
 
 from pretix.base.models import CachedFile
+from pretix.helpers.http import ChunkBasedFileResponse
 
 
 class DownloadView(TemplateView):
@@ -20,7 +21,7 @@ class DownloadView(TemplateView):
         if 'ajax' in request.GET:
             return HttpResponse('1' if self.object.file else '0')
         elif self.object.file:
-            resp = FileResponse(self.object.file.file, content_type=self.object.type)
+            resp = ChunkBasedFileResponse(self.object.file.file, content_type=self.object.type)
             resp['Content-Disposition'] = 'attachment; filename="{}"'.format(self.object.filename)
             return resp
         else:

src/pretix/base/views/mixins.py

@@ -7,7 +7,7 @@ from django.db.models import Prefetch
 from django.utils.functional import cached_property
 
 from pretix.base.forms.questions import (
-    BaseInvoiceAddressForm, BaseQuestionsForm,
+    BaseInvoiceAddressForm, BaseInvoiceNameForm, BaseQuestionsForm,
 )
 from pretix.base.models import (
     CartPosition, InvoiceAddress, OrderPosition, Question, QuestionAnswer,
@@ -144,6 +144,7 @@ class BaseQuestionsViewMixin:
 
 class OrderQuestionsViewMixin(BaseQuestionsViewMixin):
     invoice_form_class = BaseInvoiceAddressForm
+    invoice_name_form_class = BaseInvoiceNameForm
     only_user_visible = True
 
     @cached_property
@@ -184,6 +185,12 @@ class OrderQuestionsViewMixin(BaseQuestionsViewMixin):
 
     @cached_property
     def invoice_form(self):
+        if not self.request.event.settings.invoice_address_asked and self.request.event.settings.invoice_name_required:
+            return self.invoice_name_form_class(
+                data=self.request.POST if self.request.method == "POST" else None,
+                event=self.request.event,
+                instance=self.invoice_address, validate_vat_id=False
+            )
         return self.invoice_form_class(
             data=self.request.POST if self.request.method == "POST" else None,
             event=self.request.event,

src/pretix/control/forms/event.py

@@ -6,7 +6,9 @@ from django.core.validators import RegexValidator
 from django.db.models import Q
 from django.forms import formset_factory
 from django.utils.timezone import get_current_timezone_name
-from django.utils.translation import pgettext_lazy, ugettext_lazy as _
+from django.utils.translation import (
+    pgettext, pgettext_lazy, ugettext_lazy as _,
+)
 from django_countries import Countries
 from django_countries.fields import LazyTypedChoiceField
 from i18nfield.forms import (
@@ -430,8 +432,8 @@ class PaymentSettingsForm(SettingsForm):
     )
     payment_term_weekdays = forms.BooleanField(
         label=_('Only end payment terms on weekdays'),
-        help_text=_("If this is activated and the payment term of any order ends on a saturday or sunday, it will be "
-                    "moved to the next monday instead. This is required in some countries by civil law. This will "
+        help_text=_("If this is activated and the payment term of any order ends on a Saturday or Sunday, it will be "
+                    "moved to the next Monday instead. This is required in some countries by civil law. This will "
                     "not effect the last date of payments configured above."),
         required=False,
     )
@@ -520,8 +522,7 @@ class InvoiceSettingsForm(SettingsForm):
         label=_("Require customer name"),
         required=False,
         widget=forms.CheckboxInput(
-            attrs={'data-checkbox-dependency': '#id_invoice_address_asked',
-                   'data-inverse-dependency': '#id_invoice_address_required'}
+            attrs={'data-inverse-dependency': '#id_invoice_address_required'}
         ),
     )
     invoice_address_vatid = forms.BooleanField(
@@ -855,12 +856,24 @@ class DisplaySettingsForm(SettingsForm):
         label=_("Show variations of a product expanded by default"),
         required=False
     )
+    frontpage_subevent_ordering = forms.ChoiceField(
+        label=pgettext('subevent', 'Date ordering'),
+        choices=[
+            ('date_ascending', _('Event start time')),
+            ('date_descending', _('Event start time (descending)')),
+            ('name_ascending', _('Name')),
+            ('name_descending', _('Name (descending)')),
+        ],  # When adding a new ordering, remember to also define it in the event model
+    )
 
     def __init__(self, *args, **kwargs):
+        event = kwargs['obj']
         super().__init__(*args, **kwargs)
         self.fields['primary_font'].choices += [
             (a, a) for a in get_fonts()
         ]
+        if not event.has_subevents:
+            del self.fields['frontpage_subevent_ordering']
 
 
 class TicketSettingsForm(SettingsForm):
@@ -985,6 +998,7 @@ class WidgetCodeForm(forms.Form):
     )
     compatibility_mode = forms.BooleanField(
         label=_("Compatibility mode"),
+        required=False,
         help_text=_("Our regular widget doesn't work in all website builders. If you run into trouble, try using "
                     "this compatibility mode.")
     )
@@ -1018,7 +1032,7 @@ class EventDeleteForm(forms.Form):
     }
     user_pw = forms.CharField(
         max_length=255,
-        label=_("New password"),
+        label=_("Your password"),
         widget=forms.PasswordInput()
     )
     slug = forms.CharField(

src/pretix/control/forms/filter.py

@@ -1,7 +1,7 @@
 from django import forms
 from django.apps import apps
 from django.db.models import Exists, F, OuterRef, Q
-from django.db.models.functions import Coalesce
+from django.db.models.functions import Coalesce, ExtractWeekDay
 from django.urls import reverse, reverse_lazy
 from django.utils.timezone import now
 from django.utils.translation import pgettext_lazy, ugettext_lazy as _
@@ -130,6 +130,7 @@ class OrderFilterForm(FilterForm):
             matching_positions = OrderPosition.objects.filter(
                 Q(order=OuterRef('pk')) & Q(
                     Q(attendee_name__icontains=u) | Q(attendee_email__icontains=u)
+                    | Q(secret__istartswith=u)
                 )
             ).values('id')
 
@@ -307,6 +308,20 @@ class SubEventFilterForm(FilterForm):
         ),
         required=False
     )
+    weekday = forms.ChoiceField(
+        label=_('Weekday'),
+        choices=(
+            ('', _('All days')),
+            ('2', _('Monday')),
+            ('3', _('Tuesday')),
+            ('4', _('Wednesday')),
+            ('5', _('Thursday')),
+            ('6', _('Friday')),
+            ('7', _('Saturday')),
+            ('1', _('Sunday')),
+        ),
+        required=False
+    )
     query = forms.CharField(
         label=_('Event name'),
         widget=forms.TextInput(attrs={
@@ -336,6 +351,9 @@ class SubEventFilterForm(FilterForm):
         elif fdata.get('status') == 'past':
             qs = qs.filter(presale_end__lte=now())
 
+        if fdata.get('weekday'):
+            qs = qs.annotate(wday=ExtractWeekDay('date_from')).filter(wday=fdata.get('weekday'))
+
         if fdata.get('query'):
             query = fdata.get('query')
             qs = qs.filter(
@@ -548,6 +566,7 @@ class CheckInFilterForm(FilterForm):
             u = fdata.get('user')
             qs = qs.filter(
                 Q(order__code__istartswith=u)
+                | Q(secret__istartswith=u)
                 | Q(order__email__icontains=u)
                 | Q(attendee_name__icontains=u)
                 | Q(attendee_email__icontains=u)

src/pretix/control/forms/item.py

@@ -27,6 +27,7 @@ class CategoryForm(I18nModelForm):
         localized_fields = '__all__'
         fields = [
             'name',
+            'internal_name',
             'description',
             'is_addon'
         ]
@@ -90,9 +91,9 @@ class QuotaForm(I18nModelForm):
         for item in items:
             if len(item.variations.all()) > 0:
                 for v in item.variations.all():
-                    choices.append(('{}-{}'.format(item.pk, v.pk), '{} – {}'.format(item.name, v.value)))
+                    choices.append(('{}-{}'.format(item.pk, v.pk), '{} – {}'.format(item, v.value)))
             else:
-                choices.append(('{}'.format(item.pk), item.name))
+                choices.append(('{}'.format(item.pk), str(item)))
 
         self.fields['itemvars'] = forms.MultipleChoiceField(
             label=_('Products'),
@@ -225,6 +226,7 @@ class ItemCreateForm(I18nModelForm):
             self.instance.max_per_order = self.cleaned_data['copy_from'].max_per_order
             self.instance.checkin_attention = self.cleaned_data['copy_from'].checkin_attention
             self.instance.free_price = self.cleaned_data['copy_from'].free_price
+            self.instance.original_price = self.cleaned_data['copy_from'].original_price
 
         self.instance.position = (self.event.items.aggregate(p=Max('position'))['p'] or 0) + 1
         instance = super().save(*args, **kwargs)
@@ -282,6 +284,7 @@ class ItemCreateForm(I18nModelForm):
         localized_fields = '__all__'
         fields = [
             'name',
+            'internal_name',
             'category',
             'admission',
             'default_price',
@@ -308,6 +311,7 @@ class ItemUpdateForm(I18nModelForm):
         fields = [
             'category',
             'name',
+            'internal_name',
             'active',
             'admission',
             'description',
@@ -322,7 +326,8 @@ class ItemUpdateForm(I18nModelForm):
             'allow_cancel',
             'max_per_order',
             'min_per_order',
-            'checkin_attention'
+            'checkin_attention',
+            'original_price'
         ]
         field_classes = {
             'available_from': forms.SplitDateTimeField,
@@ -343,7 +348,7 @@ class ItemVariationsFormSet(I18nFormSet):
                 f.fields['DELETE'].disabled = True
                 raise ValidationError(
                     message=_('The variation "%s" cannot be deleted because it has already been ordered by a user or '
-                              'currently is in a users\'s cart. Please set the variation as "inactive" instead.'),
+                              'currently is in a user\'s cart. Please set the variation as "inactive" instead.'),
                     params=(str(f.instance),)
                 )
 

src/pretix/control/forms/orders.py

@@ -36,7 +36,9 @@ class ExtendForm(I18nModelForm):
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
-        if self.instance.status == Order.STATUS_PENDING or self.instance._is_still_available(now(), count_waitinglist=False) is True:
+        if self.instance.status == Order.STATUS_PENDING or self.instance._is_still_available(now(),
+                                                                                             count_waitinglist=False)\
+                is True:
             del self.fields['quota_ignore']
 
     def clean(self):
@@ -47,8 +49,33 @@ class ExtendForm(I18nModelForm):
         return data
 
 
-class ExporterForm(forms.Form):
+class MarkPaidForm(forms.Form):
+    force = forms.BooleanField(
+        label=_('Overbook quota and ignore late payment'),
+        help_text=_('If you check this box, this operation will be performed even if it leads to an overbooked quota '
+                    'and you having sold more tickets than you planned! The operation will also be performed '
+                    'regardless of the settings for late payments.'),
+        required=False
+    )
 
+    def __init__(self, *args, **kwargs):
+        self.instance = kwargs.pop("instance")
+        super().__init__(*args, **kwargs)
+        quota_success = (
+            self.instance.status == Order.STATUS_PENDING or
+            self.instance._is_still_available(now(), count_waitinglist=False) is True
+        )
+        term_last = self.instance.payment_term_last
+        term_success = (
+            (not term_last or term_last >= now()) and
+            (self.instance.status == Order.STATUS_PENDING or self.instance.event.settings.get(
+                'payment_term_accept_late'))
+        )
+        if quota_success and term_success:
+            del self.fields['force']
+
+
+class ExporterForm(forms.Form):
     def clean(self):
         data = super().clean()
 
@@ -144,7 +171,7 @@ class OrderPositionAddForm(forms.Form):
 
         choices = []
         for i in order.event.items.prefetch_related('variations').all():
-            pname = str(i.name)
+            pname = str(i)
             if not i.is_available():
                 pname += ' ({})'.format(_('inactive'))
             variations = list(i.variations.all())
@@ -206,6 +233,7 @@ class OrderPositionChangeForm(forms.Form):
             ('subevent', 'Change event date'),
             ('cancel', 'Remove product'),
             ('split', 'Split into new order'),
+            ('secret', 'Regenerate secret'),
         )
     )
 
@@ -243,7 +271,7 @@ class OrderPositionChangeForm(forms.Form):
 
         choices = []
         for i in instance.order.event.items.prefetch_related('variations').all():
-            pname = str(i.name)
+            pname = str(i)
             if not i.is_available():
                 pname += ' ({})'.format(_('inactive'))
             variations = list(i.variations.all())

src/pretix/control/forms/subevents.py

@@ -102,7 +102,7 @@ class SubEventItemForm(SubEventItemOrVariationFormMixin, forms.ModelForm):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.fields['price'].widget.attrs['placeholder'] = money_filter(self.item.default_price, self.item.event.currency, hide_currency=True)
-        self.fields['price'].label = str(self.item.name)
+        self.fields['price'].label = str(self.item)
 
     class Meta:
         model = SubEventItem
@@ -116,7 +116,7 @@ class SubEventItemVariationForm(SubEventItemOrVariationFormMixin, forms.ModelFor
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.fields['price'].widget.attrs['placeholder'] = money_filter(self.variation.price, self.item.event.currency, hide_currency=True)
-        self.fields['price'].label = '{} – {}'.format(str(self.item.name), self.variation.value)
+        self.fields['price'].label = '{} – {}'.format(str(self.item), self.variation.value)
 
     class Meta:
         model = SubEventItem

src/pretix/control/forms/vouchers.py

@@ -86,13 +86,13 @@ class VoucherForm(I18nModelForm):
                 itemid, varid = iv.split('-')
                 i = self.instance.event.items.get(pk=itemid)
                 v = i.variations.get(pk=varid)
-                choices.append(('%d-%d' % (i.pk, v.pk), '%s – %s' % (i.name, v.value)))
+                choices.append(('%d-%d' % (i.pk, v.pk), '%s – %s' % (str(i), v.value)))
             elif iv:
                 i = self.instance.event.items.get(pk=iv)
                 if i.variations.exists():
-                    choices.append((str(i.pk), _('{product} – Any variation').format(product=i.name)))
+                    choices.append((str(i.pk), _('{product} – Any variation').format(product=i)))
                 else:
-                    choices.append((str(i.pk), str(i.name)))
+                    choices.append((str(i.pk), str(i)))
 
         self.fields['itemvar'].choices = choices
         self.fields['itemvar'].widget = Select2ItemVarQuota(

src/pretix/control/logdisplay.py

@@ -1,6 +1,7 @@
 import json
 from decimal import Decimal
 
+import bleach
 import dateutil.parser
 import pytz
 from django.dispatch import receiver
@@ -81,6 +82,10 @@ def _display_order_changed(event: Event, logentry: LogEntry):
                 item=item,
                 price=money_filter(Decimal(data['price']), event.currency),
             )
+    elif logentry.action_type == 'pretix.event.order.changed.secret':
+        return text + ' ' + _('A new secret has been generated for position #{posid}.').format(
+            posid=data.get('positionid', '?'),
+        )
     elif logentry.action_type == 'pretix.event.order.changed.split':
         old_item = str(event.items.get(pk=data['old_item']))
         if data['old_variation']:
@@ -192,6 +197,8 @@ def pretixcontrol_logentry_display(sender: Event, logentry: LogEntry, **kwargs):
         'pretix.user.settings.notifications.enabled': _('Notifications have been enabled.'),
         'pretix.user.settings.notifications.disabled': _('Notifications have been disabled.'),
         'pretix.user.settings.notifications.changed': _('Your notification settings have been changed.'),
+        'pretix.user.oauth.authorized': _('The application "{application_name}" has been authorized to access your '
+                                          'account.'),
         'pretix.control.auth.user.forgot_password.mail_sent': _('Password reset mail sent.'),
         'pretix.control.auth.user.forgot_password.recovered': _('The password has been reset.'),
         'pretix.voucher.added': _('The voucher has been created.'),
@@ -278,6 +285,11 @@ def pretixcontrol_logentry_display(sender: Event, logentry: LogEntry, **kwargs):
     if logentry.action_type.startswith('pretix.event.tickets.provider.'):
         return _('The settings of a ticket output provider have been changed.')
 
+    if logentry.action_type == 'pretix.event.order.consent':
+        return _('The user confirmed the following message: "{}"').format(
+            bleach.clean(logentry.parsed_data.get('msg'), tags=[], strip=True)
+        )
+
     if logentry.action_type == 'pretix.event.checkin':
         return _display_checkin(sender, logentry)
 

src/pretix/control/signals.py

@@ -232,3 +232,10 @@ styles. It is advisable to set a prefix for your form to avoid clashes with othe
 
 As with all plugin signals, the ``sender`` keyword argument will contain the event.
 """
+
+oauth_application_registered = Signal(
+    providing_args=["user", "application"]
+)
+"""
+This signal will be called whenever a user registers a new OAuth application.
+"""

src/pretix/control/templates/pretixcontrol/auth/login_2fa.html

@@ -8,7 +8,7 @@
         {% csrf_token %}
         <h3>{% trans "Welcome back!" %}</h3>
         <p>
-            {% trans "You configured your account to require authentification with a second medium, e.g. your phone. Please enter your verification code here:" %}
+            {% trans "You configured your account to require authentication with a second medium, e.g. your phone. Please enter your verification code here:" %}
         </p>
         <div class="form-group">
             <input class="form-control" name="token" placeholder="{% trans "Token" %}"

src/pretix/control/templates/pretixcontrol/auth/oauth_authorization.html

@@ -0,0 +1,51 @@
+{% extends "pretixcontrol/auth/base.html" %}
+{% load bootstrap3 %}
+{% load staticfiles %}
+{% load i18n %}
+{% block content %}
+    {% if not error %}
+	<form class="form-signin" action="" method="post">
+        <h3>{% trans "Authorize an application" %}</h3>
+
+        {% csrf_token %}
+        {% for field in form %}
+            {% if field.is_hidden %}
+                {{ field }}
+            {% endif %}
+        {% endfor %}
+
+        <p>
+            {% blocktrans trimmed with application=application.name %}
+                Do you really want to grant the application <strong>{{ application }}</strong> access to your
+                pretix account?
+            {% endblocktrans %}
+        </p>
+        <p>{% trans "The application requires the following permissions:" %}</p>
+        <ul>
+            {% for scope in scopes_descriptions %}
+                <li>{{ scope }}</li>
+            {% endfor %}
+        </ul>
+        <p>{% trans "Please select the organizer accounts this application should get access to:" %}</p>
+        {% bootstrap_field form.organizers layout="inline" %}
+
+        {% bootstrap_form_errors form layout="control" %}
+        <p class="text-danger">
+            {% blocktrans trimmed %}
+                This application has <strong>not</strong> been reviewed by the pretix team. Granting access to your
+                pretix account happens at your own risk.
+            {% endblocktrans %}
+        </p>
+
+		<div class="form-group buttons">
+            <input type="submit" class="btn btn-large btn-default" value="Cancel"/>
+            <input type="submit" class="btn btn-large btn-primary" name="allow" value="Authorize"/>
+		</div>
+	</form>
+    {% else %}
+        <form class="form-signin" action="" method="post">
+            <h3>{% trans "Error:" %} {{ error.error }}</h3>
+            <p>{{ error.description }}</p>
+        </form>
+    {% endif %}
+{% endblock %}

src/pretix/control/templates/pretixcontrol/base.html

@@ -42,6 +42,7 @@
             <script type="text/javascript" src="{% static "pretixcontrol/js/ui/mail.js" %}"></script>
             <script type="text/javascript" src="{% static "pretixcontrol/js/ui/typeahead.js" %}"></script>
             <script type="text/javascript" src="{% static "pretixcontrol/js/ui/quicksetup.js" %}"></script>
+            <script type="text/javascript" src="{% static "pretixbase/js/details.js" %}"></script>
             <script type="text/javascript" src="{% static "pretixbase/js/asynctask.js" %}"></script>
             <script type="text/javascript" src="{% static "pretixbase/js/asyncdownload.js" %}"></script>
             <script type="text/javascript" src="{% static "colorpicker/bootstrap-colorpicker.js" %}"></script>
@@ -53,7 +54,10 @@
         <link rel="icon" href="{% static "pretixbase/img/favicon.ico" %}">
         {% block custom_header %}{% endblock %}
 	</head>
-	<body data-datetimeformat="{{ js_datetime_format }}" data-timeformat="{{ js_time_format }}" data-dateformat="{{ js_date_format }}" data-datetimelocale="{{ js_locale }}" data-payment-weekdays-disabled="{{ js_payment_weekdays_disabled }}" data-select2-locale="{{ select2locale }}" data-longdateformat="{{ js_long_date_format }}">
+	<body data-datetimeformat="{{ js_datetime_format }}" data-timeformat="{{ js_time_format }}"
+            data-dateformat="{{ js_date_format }}" data-datetimelocale="{{ js_locale }}"
+            data-payment-weekdays-disabled="{{ js_payment_weekdays_disabled }}"
+            data-select2-locale="{{ select2locale }}" data-longdateformat="{{ js_long_date_format }}" class="nojs">
         <div id="wrapper">
             <nav class="navbar navbar-inverse navbar-static-top" role="navigation">
                 <div class="navbar-header">

src/pretix/control/templates/pretixcontrol/checkin/index.html

@@ -90,7 +90,7 @@
                                     <span class="label label-warning">{% trans "unpaid" %}</span>
                                 {% endif %}
                             </td>
-                            <td>{{ e.item.name }}{% if e.variation %} – {{ e.variation }}{% endif %}</td>
+                            <td>{{ e.item }}{% if e.variation %} – {{ e.variation }}{% endif %}</td>
                             <td>{{ e.order.email }}</td>
                             <td>
                                 {% if e.addon_to %}

src/pretix/control/templates/pretixcontrol/email/security_notice.txt

@@ -1,4 +1,4 @@
-{% load i18n %}{% blocktrans with url=url|safe %}Hello,
+{% load i18n %}{% blocktrans with url=url|safe messages=messages|safe %}Hello,
 
 this is to inform you that the account information of your pretix account has been
 changed. In particular, the following changes have been performed:

src/pretix/control/templates/pretixcontrol/event/base.html

@@ -42,7 +42,7 @@
             <ul class="nav nav-second-level">
                 <li>
                     <a href="{% url 'control:event.items' organizer=request.event.organizer.slug event=request.event.slug %}"
-                            {% if "event.items" == url_name or "event.item." in url_name or url_name == "event.item" %}class="active"{% endif %}>
+                            {% if "event.items" == url_name or "event.item." in url_name or "event.items.add" == url_name or url_name == "event.item" %}class="active"{% endif %}>
                         {% trans "Products" %}</a>
                 </li>
                 <li>

src/pretix/control/templates/pretixcontrol/event/display.html

@@ -11,6 +11,9 @@
             {% bootstrap_field form.logo_image layout="control" %}
             {% bootstrap_field form.frontpage_text layout="control" %}
             {% bootstrap_field form.show_variations_expanded layout="control" %}
+            {% if form.frontpage_subevent_ordering %}
+                {% bootstrap_field form.frontpage_subevent_ordering layout="control" %}
+            {% endif %}
         </fieldset>
         <fieldset>
             <legend>{% trans "Shop design" %}</legend>

src/pretix/control/templates/pretixcontrol/event/index.html

@@ -124,6 +124,13 @@
                                     <span class="fa fa-user fa-fw"></span>
                                 {% endif %}
                                 {{ log.user.get_full_name }}
+                                {% if log.oauth_application %}
+                                    <br><span class="fa fa-plug fa-fw"></span>
+                                    {{ log.oauth_application.name }}
+                                {% endif %}
+                            {% elif log.api_token %}
+                                <span class="fa fa-key fa-fw"></span>
+                                {{ log.api_token.name }}
                             {% endif %}
                         </div>
                         <div class="col-lg-2 col-sm-12 col-xs-12">

src/pretix/control/templates/pretixcontrol/event/logs.html

@@ -16,7 +16,8 @@
                 </option>
                 {% for up in userlist %}
                     {% if up.user__id %}
-                        <option value="{{ up.user__id }}" {% if request.GET.user == up.user__id %}selected="selected"{% endif %}>
+                        <option value="{{ up.user__id }}"
+                                {% if request.GET.user == up.user__id %}selected="selected"{% endif %}>
                             {{ up.user__email }}
                         </option>
                     {% endif %}
@@ -42,13 +43,20 @@
                         {% if log.user %}
                             {% if log.user.is_staff %}
                                 <span class="fa fa-id-card fa-danger fa-fw"
-                                     data-toggle="tooltip"
-                                     title="{% trans "This change was performed by a pretix administrator." %}">
+                                      data-toggle="tooltip"
+                                      title="{% trans "This change was performed by a pretix administrator." %}">
                                 </span>
                             {% else %}
                                 <span class="fa fa-user fa-fw"></span>
                             {% endif %}
                             {{ log.user.get_full_name }}
+                            {% if log.oauth_application %}
+                                <br><span class="fa fa-plug fa-fw"></span>
+                                {{ log.oauth_application.name }}
+                            {% endif %}
+                        {% elif log.api_token %}
+                            <span class="fa fa-key fa-fw"></span>
+                            {{ log.api_token.name }}
                         {% endif %}
                     </div>
                     <div class="col-lg-2 col-sm-12 col-xs-12">
@@ -61,7 +69,7 @@
                     </div>
                 </div>
             </li>
-        {% empty %}
+            {% empty %}
             <div class="list-group-item">
                 <em>{% trans "No results" %}</em>
             </div>

src/pretix/control/templates/pretixcontrol/event/mail_settings_fragment.html

@@ -1,16 +1,14 @@
 {% load i18n %}
 {% load bootstrap3 %}
 {% load mail_settings_preview %}
-<div class="panel panel-default">
-    <div class="panel-heading">
+<details class="panel panel-default">
+    <summary class="panel-heading">
         <h4 class="panel-title">
-            <a class="collapsed" data-toggle="collapse" href="#{{ pid }}">
-                <strong>{% trans title %}</strong>
-                <i class="fa fa-angle-down collapse-indicator"></i>
-            </a>
+            <strong>{% trans title %}</strong>
+            <i class="fa fa-angle-down collapse-indicator"></i>
         </h4>
-    </div>
-    <div id="{{ pid }}" class="panel-collapse collapse">
+    </summary>
+    <div id="{{ pid }}">
         <div class="panel-body">
             {% with exclude|split as exclusion %}
             {% with items|split as item_list %}
@@ -51,4 +49,4 @@
             {% endwith %}
         </div>
     </div>
-</div>
+</details>

src/pretix/control/templates/pretixcontrol/event/payment.html

@@ -46,6 +46,7 @@
         </fieldset>
         <fieldset>
             <legend>{% trans "General payment settings" %}</legend>
+            {% bootstrap_form_errors form layout="control" %}
             {% bootstrap_field form.payment_term_days layout="control" %}
             {% bootstrap_field form.payment_term_last layout="control" %}
             {% bootstrap_field form.payment_term_weekdays layout="control" %}

src/pretix/control/templates/pretixcontrol/event/tax_edit.html

@@ -21,16 +21,15 @@
         {% bootstrap_field form.name layout="control" %}
         {% bootstrap_field form.rate addon_after="%" layout="control" %}
 
-        <div class="panel panel-default">
-            <div class="panel-heading">
+        <details class="panel panel-default"
+                {% if rule.eu_reverse_charge or rule.has_custom_rules or form.errors %}open{% endif %}>
+            <summary class="panel-heading">
                 <h4 class="panel-title">
-                    <a data-toggle="collapse" href="#advanced">
-                        <strong>{% trans "Advanced settings" %}</strong>
-                        <i class="fa fa-angle-down collapse-indicator"></i>
-                    </a>
+                    <strong>{% trans "Advanced settings" %}</strong>
+                    <i class="fa fa-angle-down collapse-indicator"></i>
                 </h4>
-            </div>
-            <div id="advanced" class="panel-collapse collapsed {% if rule.eu_reverse_charge or rule.has_custom_rules or form.errors %}in{% endif %}">
+            </summary>
+            <div id="advanced">
                 <div class="panel-body">
                     <legend>{% trans "Advanced settings" %}</legend>
                     <div class="alert alert-legal">
@@ -52,6 +51,7 @@
                             checked in order and once the first rule matches the order, it will be used and all further rules will
                             be ignored. If no rule matches, tax will be charged.
                         {% endblocktrans %}
+                        {% trans "All of these rules will only apply if an invoice address is set." %}
                     </div>
 
                     <div class="formset" data-formset data-formset-prefix="{{ formset.prefix }}">
@@ -111,7 +111,7 @@
                     </div>
                 </div>
             </div>
-        </div>
+        </details>
 
 
         <div class="form-group submit-group">

src/pretix/control/templates/pretixcontrol/events/create_basics.html

@@ -27,6 +27,11 @@
                         references as an abbreviation to reference this event.
                     {% endblocktrans %}
                 </div>
+                <div class="slug-length alert alert-warning helper-display-none-soft">
+                    {% blocktrans trimmed %}
+                        We strongly recommend against using short forms of more then 16 characters.
+                    {% endblocktrans %}
+                </div>
             </div>
         </div>
         {% bootstrap_field form.date_from layout="control" %}

src/pretix/control/templates/pretixcontrol/includes/logs.html

@@ -15,6 +15,13 @@
                         <span class="fa fa-user fa-fw"></span>
                     {% endif %}
                     {{ log.user.get_full_name }}
+                    {% if log.oauth_application %}
+                        <span class="fa fa-plug fa-fw"></span>
+                        {{ log.oauth_application.name }}
+                    {% endif %}
+                {% elif log.api_token %}
+                    <span class="fa fa-key fa-fw"></span>
+                    {{ log.api_token.name }}
                 {% endif %}
                 {% if log.shredded %}
                     <span class="fa fa-eraser fa-danger fa-fw"

src/pretix/control/templates/pretixcontrol/item/create.html

@@ -10,6 +10,9 @@
         <fieldset>
             <legend>{% trans "General information" %}</legend>
             {% bootstrap_field form.name layout="control" %}
+            <div class="internal-name-wrapper">
+                {% bootstrap_field form.internal_name layout="control" %}
+            </div>
             {% bootstrap_field form.copy_from layout="control" %}
             {% bootstrap_field form.has_variations layout="control" %}
             {% bootstrap_field form.category layout="control" %}

src/pretix/control/templates/pretixcontrol/item/index.html

@@ -9,6 +9,9 @@
                 <fieldset>
                     <legend>{% trans "General information" %}</legend>
                     {% bootstrap_field form.name layout="control" %}
+                    <div class="internal-name-wrapper">
+                        {% bootstrap_field form.internal_name layout="control" %}
+                    </div>
                     {% bootstrap_field form.active layout="control" %}
                     {% bootstrap_field form.category layout="control" %}
                     {% bootstrap_field form.admission layout="control" %}
@@ -35,14 +38,13 @@
                     <legend>{% trans "Check-in" %}</legend>
                     {% bootstrap_field form.checkin_attention layout="control" %}
                 </fieldset>
-                {% if plugin_forms %}
-                    <fieldset>
-                        <legend>{% trans "Additional settings" %}</legend>
-                        {% for f in plugin_forms %}
-                            {% bootstrap_form f layout="control" %}
-                        {% endfor %}
-                    </fieldset>
-                {% endif %}
+                <fieldset>
+                    <legend>{% trans "Additional settings" %}</legend>
+                    {% bootstrap_field form.original_price addon_after=request.event.currency layout="control" %}
+                    {% for f in plugin_forms %}
+                        {% bootstrap_form f layout="control" %}
+                    {% endfor %}
+                </fieldset>
             </div>
             <div class="col-xs-12 col-lg-2">
                 <div class="panel panel-default">

src/pretix/control/templates/pretixcontrol/items/category.html

@@ -12,6 +12,9 @@
                 <fieldset>
                     <legend>{% trans "General information" %}</legend>
                     {% bootstrap_field form.name layout="control" %}
+                    <div class="internal-name-wrapper">
+                        {% bootstrap_field form.internal_name layout="control" %}
+                    </div>
                     {% bootstrap_field form.description layout="control" %}
                     {% bootstrap_field form.is_addon layout="control" %}
                 </fieldset>

src/pretix/control/templates/pretixcontrol/items/index.html

@@ -48,7 +48,7 @@
                             <td><strong>
                                 {% if not i.active %}<strike>{% endif %}
                                 <a href="
-                        {% url "control:event.item" organizer=request.event.organizer.slug event=request.event.slug item=i.id %}">{{ i.name }}</a>
+                        {% url "control:event.item" organizer=request.event.organizer.slug event=request.event.slug item=i.id %}">{{ i }}</a>
                                 {% if not i.active %}</strike>{% endif %}
                             </strong>
                             </td>

src/pretix/control/templates/pretixcontrol/items/questions.html

@@ -53,7 +53,7 @@
                         <td>
                             <ul>
                                 {% for item in q.items.all %}
-                                    <li><a href="{% url "control:event.item" organizer=request.event.organizer.slug event=request.event.slug item=item.id %}">{{ item.name }}</a></li>
+                                    <li><a href="{% url "control:event.item" organizer=request.event.organizer.slug event=request.event.slug item=item.id %}">{{ item }}</a></li>
                                 {% endfor %}
                             </ul>
                         </td>

src/pretix/control/templates/pretixcontrol/items/quotas.html

@@ -60,7 +60,7 @@
                         <td>
                             <ul>
                                 {% for item in q.items.all %}
-                                    <li><a href="{% url "control:event.item" organizer=request.event.organizer.slug event=request.event.slug item=item.id %}">{{ item.name }}</a></li>
+                                    <li><a href="{% url "control:event.item" organizer=request.event.organizer.slug event=request.event.slug item=item.id %}">{{ item }}</a></li>
                                 {% endfor %}
                             </ul>
                         </td>

src/pretix/control/templates/pretixcontrol/multi_languages_widget.html

@@ -11,7 +11,7 @@
         </span>
     {% elif not widget.official %}
         <span class="label label-warning" data-toggle="tooltip" title="{% trans "This translation is not maintained by the pretix team. We cannot vouch for its correctness and new or recently changed features might not be translated and will show in English instead. You can help translating at translate.pretix.eu." %}">
-            {% trans "Inofficial translation" %}
+            {% trans "Unofficial translation" %}
         </span>
     {% endif %}
     </label>