Event dashboard: Use intcomma in numbers (Z#23175343)

* Add the option to introduce rich-text placeholders

* Add tests in test_format

* Add some css

* Block vs inline

* Some fixed css

* Update src/pretix/control/forms/event.py

Co-authored-by: Mira <weller@rami.io>

* Add missing docstring prat

---------

Co-authored-by: Mira <weller@rami.io>

.github/workflows/build.yml

@@ -38,7 +38,7 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pip-
       - name: Install system dependencies
-        run: sudo apt update && sudo apt install gettext unzip
+        run: sudo apt update && sudo apt install -y gettext unzip
       - name: Install Python dependencies
         run: pip3 install -U setuptools build pip check-manifest
       - name: Run check-manifest

.github/workflows/docs.yml

@@ -37,7 +37,7 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pip-
       - name: Install system packages
-        run: sudo apt update && sudo apt install enchant-2 hunspell aspell-en
+        run: sudo apt update && sudo apt install -y enchant-2 hunspell aspell-en
       - name: Install Dependencies
         run: pip3 install -Ur requirements.txt
         working-directory: ./doc

.github/workflows/strings.yml

@@ -35,9 +35,9 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pip-
       - name: Install system packages
-        run: sudo apt update && sudo apt install gettext
+        run: sudo apt update && sudo apt -y install gettext
       - name: Install Dependencies
-        run: pip3 install -e ".[dev]"
+        run: pip3 install uv && uv pip install --system -e ".[dev]"
       - name: Compile messages
         run: python manage.py compilemessages
         working-directory: ./src
@@ -62,7 +62,7 @@ jobs:
       - name: Install system packages
         run: sudo apt update && sudo apt install enchant-2 hunspell hunspell-de-de aspell-en aspell-de
       - name: Install Dependencies
-        run: pip3 install -e ".[dev]"
+        run: pip3 install uv && uv pip install --system -e ".[dev]"
       - name: Spellcheck translations
         run: potypo
         working-directory: ./src

.github/workflows/style.yml

@@ -35,7 +35,7 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pip-
       - name: Install Dependencies
-        run: pip3 install -e ".[dev]" psycopg2-binary
+        run: pip3 install uv && uv pip install --system -e ".[dev]" psycopg2-binary
       - name: Run isort
         run: isort -c .
         working-directory: ./src
@@ -55,7 +55,7 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pip-
       - name: Install Dependencies
-        run: pip3 install -e ".[dev]" psycopg2-binary
+        run: pip3 install uv && uv pip install --system -e ".[dev]" psycopg2-binary
       - name: Run flake8
         run: flake8 .
         working-directory: ./src

.github/workflows/tests.yml

@@ -30,15 +30,21 @@ jobs:
             python-version: "3.9"
           - database: sqlite
             python-version: "3.10"
+    services:
+      postgres:
+        image: postgres:15
+        env:
+          POSTGRES_PASSWORD: postgres
+          POSTGRES_DB: pretix
+        options: >-
+          --health-cmd "pg_isready -U postgres -d pretix"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 5432:5432
     steps:
       - uses: actions/checkout@v4
-      - uses: harmon758/postgresql-action@v1
-        with:
-          postgresql version: '15'
-          postgresql db: 'pretix'
-          postgresql user: 'postgres'
-          postgresql password: 'postgres'
-        if: matrix.database == 'postgres'
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
         with:
@@ -50,9 +56,9 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pip-
       - name: Install system dependencies
-        run: sudo apt update && sudo apt install gettext
+        run: sudo apt update && sudo apt install -y gettext
       - name: Install Python dependencies
-        run: pip3 install --ignore-requires-python -e ".[dev]" psycopg2-binary  # We ignore that flake8 needs newer python as we don't run flake8 during tests
+        run: pip3 install uv && uv pip install --system -e ".[dev]" psycopg2-binary
       - name: Run checks
         run: python manage.py check
         working-directory: ./src
@@ -64,15 +70,15 @@ jobs:
         run: make all compress
       - name: Run tests
         working-directory: ./src
-        run: PRETIX_CONFIG_FILE=tests/travis_${{ matrix.database }}.cfg py.test -n 3 -p no:sugar --cov=./ --cov-report=xml --reruns 3 tests --maxfail=100
+        run: PRETIX_CONFIG_FILE=tests/ci_${{ matrix.database }}.cfg py.test -n 3 -p no:sugar --cov=./ --cov-report=xml tests --maxfail=100
       - name: Run concurrency tests
         working-directory: ./src
-        run: PRETIX_CONFIG_FILE=tests/travis_${{ matrix.database }}.cfg py.test tests/concurrency_tests/ --reruns 0 --reuse-db
+        run: PRETIX_CONFIG_FILE=tests/ci_${{ matrix.database }}.cfg py.test tests/concurrency_tests/ --reuse-db
         if: matrix.database == 'postgres'
       - name: Upload coverage
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@v4
         with:
           file: src/coverage.xml
           token: ${{ secrets.CODECOV_TOKEN }}
-          fail_ci_if_error: true
+          fail_ci_if_error: false
         if: matrix.database == 'postgres' && matrix.python-version == '3.11'

.gitlab-ci.yml

@@ -10,7 +10,7 @@ tests:
         - cd src
         - python manage.py check
         - make all compress
-        - PRETIX_CONFIG_FILE=tests/travis_sqlite.cfg py.test --reruns 3 -n 3 tests --maxfail=100
+        - PRETIX_CONFIG_FILE=tests/ci_sqlite.cfg py.test -n 3 tests --maxfail=100
     except:
         - pypi
 pypi:

doc/admin/config.rst

@@ -288,17 +288,26 @@ Example::
     [django]
     secret=j1kjps5a5&4ilpn912s7a1!e2h!duz^i3&idu@_907s$wrz@x-
     debug=off
+    passwords_argon2=on
 
 ``secret``
     The secret to be used by Django for signing and verification purposes. If this
     setting is not provided, pretix will generate a random secret on the first start
     and will store it in the filesystem for later usage.
 
+``secret_fallback0`` ... ``secret_fallback9``
+    Prior versions of the secret to be used by Django for signing and verification purposes that will still
+    be accepted but no longer be used for new signing.
+
 ``debug``
     Whether or not to run in debug mode. Default is ``False``.
 
     .. WARNING:: Never set this to ``True`` in production!
 
+``passwords_argon``
+    Use the ``argon2`` algorithm for password hashing. Disable on systems with a small number of CPU cores (currently
+    less than 8).
+
 ``profile``
     Enable code profiling for a random subset of requests. Disabled by default, see
     :ref:`perf-monitoring` for details.

doc/admin/installation/docker_smallscale.rst

@@ -231,11 +231,10 @@ The following snippet is an example on how to configure a nginx proxy for pretix
         }
     }
     server {
-        listen 443 default_server;
-        listen [::]:443 ipv6only=on default_server;
+        listen 443 ssl default_server;
+        listen [::]:443 ipv6only=on ssl default_server;
         server_name pretix.mydomain.com;
 
-        ssl on;
         ssl_certificate /path/to/cert.chain.pem;
         ssl_certificate_key /path/to/key.pem;
 

doc/admin/installation/manual_smallscale.rst

@@ -216,11 +216,10 @@ The following snippet is an example on how to configure a nginx proxy for pretix
         }
     }
     server {
-        listen 443 default_server;
-        listen [::]:443 ipv6only=on default_server;
+        listen 443 ssl default_server;
+        listen [::]:443 ipv6only=on ssl default_server;
         server_name pretix.mydomain.com;
 
-        ssl on;
         ssl_certificate /path/to/cert.chain.pem;
         ssl_certificate_key /path/to/key.pem;
 

doc/api/resources/auto_checkin_rules.rst

@@ -71,7 +71,7 @@ Endpoints
             "mode": "placed",
             "all_sales_channels": false,
             "limit_sales_channels": ["web"],
-            "all_products": False,
+            "all_products": false,
             "limit_products": [2, 3],
             "limit_variations": [456],
             "all_payment_methods": true,
@@ -113,7 +113,7 @@ Endpoints
         "mode": "placed",
         "all_sales_channels": false,
         "limit_sales_channels": ["web"],
-        "all_products": False,
+        "all_products": false,
         "limit_products": [2, 3],
         "limit_variations": [456],
         "all_payment_methods": true,
@@ -146,7 +146,7 @@ Endpoints
         "mode": "placed",
         "all_sales_channels": false,
         "limit_sales_channels": ["web"],
-        "all_products": False,
+        "all_products": false,
         "limit_products": [2, 3],
         "limit_variations": [456],
         "all_payment_methods": true,
@@ -167,7 +167,7 @@ Endpoints
         "mode": "placed",
         "all_sales_channels": false,
         "limit_sales_channels": ["web"],
-        "all_products": False,
+        "all_products": false,
         "limit_products": [2, 3],
         "limit_variations": [456],
         "all_payment_methods": true,
@@ -216,7 +216,7 @@ Endpoints
         "mode": "placed",
         "all_sales_channels": false,
         "limit_sales_channels": ["web"],
-        "all_products": False,
+        "all_products": false,
         "limit_products": [2, 3],
         "limit_variations": [456],
         "all_payment_methods": true,

doc/api/resources/categories.rst

@@ -23,6 +23,22 @@ position                              integer                    An integer, use
 is_addon                              boolean                    If ``true``, items within this category are not on sale
                                                                  on their own but the category provides a source for
                                                                  defining add-ons for other products.
+cross_selling_mode                    string                     If ``null``, cross-selling is disabled for this category.
+                                                                 If ``"only"``, it is only visible in the cross-selling
+                                                                 step.
+                                                                 If ``"both"``, it is visible on the normal index page
+                                                                 as well.
+                                                                 Only available if ``is_addon`` is ``false``.
+cross_selling_condition               string                     Only relevant if ``cross_selling_mode`` is not ``null``.
+                                                                 If ``"always"``, always show in cross-selling step.
+                                                                 If ``"products"``, only show if the cart contains one of
+                                                                 the products listed in ``cross_selling_match_products``.
+                                                                 If ``"discounts"``, only show products that qualify for
+                                                                 a discount according to discount rules.
+cross_selling_match_products          list of integer            Only relevant if ``cross_selling_condition`` is
+                                                                 ``"products"``. Internal ID of the items of which at
+                                                                 least one needs to be in the cart for this category to
+                                                                 be shown.
 ===================================== ========================== =======================================================
 
 
@@ -60,7 +76,10 @@ Endpoints
             "internal_name": "",
             "description": {"en": "Tickets are what you need to get in."},
             "position": 1,
-            "is_addon": false
+            "is_addon": false,
+            "cross_selling_mode": null,
+            "cross_selling_condition": null,
+            "cross_selling_match_products": []
           }
         ]
       }
@@ -102,7 +121,10 @@ Endpoints
         "internal_name": "",
         "description": {"en": "Tickets are what you need to get in."},
         "position": 1,
-        "is_addon": false
+        "is_addon": false,
+        "cross_selling_mode": null,
+        "cross_selling_condition": null,
+        "cross_selling_match_products": []
       }
 
    :param organizer: The ``slug`` field of the organizer to fetch
@@ -130,7 +152,10 @@ Endpoints
         "internal_name": "",
         "description": {"en": "Tickets are what you need to get in."},
         "position": 1,
-        "is_addon": false
+        "is_addon": false,
+        "cross_selling_mode": null,
+        "cross_selling_condition": null,
+        "cross_selling_match_products": []
       }
 
    **Example response**:
@@ -147,7 +172,10 @@ Endpoints
         "internal_name": "",
         "description": {"en": "Tickets are what you need to get in."},
         "position": 1,
-        "is_addon": false
+        "is_addon": false,
+        "cross_selling_mode": null,
+        "cross_selling_condition": null,
+        "cross_selling_match_products": []
       }
 
    :param organizer: The ``slug`` field of the organizer of the event to create a category for
@@ -193,7 +221,10 @@ Endpoints
         "internal_name": "",
         "description": {"en": "Tickets are what you need to get in."},
         "position": 1,
-        "is_addon": true
+        "is_addon": true,
+        "cross_selling_mode": null,
+        "cross_selling_condition": null,
+        "cross_selling_match_products": []
       }
 
    :param organizer: The ``slug`` field of the organizer to modify

doc/api/resources/checkinlists.rst

@@ -31,8 +31,6 @@ subevent                              integer                    ID of the date
 position_count                        integer                    Number of tickets that match this list (read-only).
 checkin_count                         integer                    Number of check-ins performed on this list (read-only).
 include_pending                       boolean                    If ``true``, the check-in list also contains tickets from orders in pending state.
-auto_checkin_sales_channels           list of strings            All items on the check-in list will be automatically marked as checked-in when purchased through any of the listed sales channels.
-                                                                 **Deprecated, will be removed in pretix 2024.10.** Use :ref:`rest-autocheckinrules`: instead.
 allow_multiple_entries                boolean                    If ``true``, subsequent scans of a ticket on this list should not show a warning but instead be stored as an additional check-in.
 allow_entry_after_exit                boolean                    If ``true``, subsequent scans of a ticket on this list are valid if the last scan of the ticket was an exit scan.
 rules                                 object                     Custom check-in logic. The contents of this field are currently not considered a stable API and modifications through the API are highly discouraged.
@@ -91,10 +89,7 @@ Endpoints
             "allow_entry_after_exit": true,
             "exit_all_at": null,
             "rules": {},
-            "addon_match": false,
-            "auto_checkin_sales_channels": [
-              "pretixpos"
-            ]
+            "addon_match": false
           }
         ]
       }
@@ -146,10 +141,7 @@ Endpoints
         "allow_entry_after_exit": true,
         "exit_all_at": null,
         "rules": {},
-        "addon_match": false,
-        "auto_checkin_sales_channels": [
-          "pretixpos"
-        ]
+        "addon_match": false
       }
 
    :param organizer: The ``slug`` field of the organizer to fetch
@@ -246,10 +238,7 @@ Endpoints
         "subevent": null,
         "allow_multiple_entries": false,
         "allow_entry_after_exit": true,
-        "addon_match": false,
-        "auto_checkin_sales_channels": [
-          "pretixpos"
-        ]
+        "addon_match": false
       }
 
    **Example response**:
@@ -271,10 +260,7 @@ Endpoints
         "subevent": null,
         "allow_multiple_entries": false,
         "allow_entry_after_exit": true,
-        "addon_match": false,
-        "auto_checkin_sales_channels": [
-          "pretixpos"
-        ]
+        "addon_match": false
       }
 
    :param organizer: The ``slug`` field of the organizer of the event/item to create a list for
@@ -326,10 +312,7 @@ Endpoints
         "subevent": null,
         "allow_multiple_entries": false,
         "allow_entry_after_exit": true,
-        "addon_match": false,
-        "auto_checkin_sales_channels": [
-          "pretixpos"
-        ]
+        "addon_match": false
       }
 
    :param organizer: The ``slug`` field of the organizer to modify
@@ -342,7 +325,7 @@ Endpoints
 
 .. http:delete:: /api/v1/organizers/(organizer)/events/(event)/checkinlist/(id)/
 
-   Delete a check-in list. Note that this also deletes the information on all check-ins performed via this list.
+   Delete a check-in list. **Note that this also deletes the information on all check-ins performed via this list.**
 
    **Example request**:
 

doc/api/resources/invoices.rst

@@ -352,12 +352,12 @@ Fetching individual invoices
 
    :param organizer: The ``slug`` field of the organizer to fetch
    :param event: The ``slug`` field of the event to fetch
-   :param invoice_no: The ``invoice_no`` field of the invoice to fetch
+   :param number: The ``number`` field of the invoice 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 this resource.
 
-.. http:get:: /api/v1/organizers/(organizer)/events/(event)/invoices/(invoice_no)/download/
+.. http:get:: /api/v1/organizers/(organizer)/events/(event)/invoices/(number)/download/
 
    Download an invoice in PDF format.
 
@@ -384,7 +384,7 @@ Fetching individual invoices
 
    :param organizer: The ``slug`` field of the organizer to fetch
    :param event: The ``slug`` field of the event to fetch
-   :param invoice_no: The ``invoice_no`` field of the invoice to fetch
+   :param number: The ``number`` field of the invoice 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 this resource.
@@ -397,7 +397,7 @@ Modifying invoices
 
 Invoices cannot be edited directly, but the following actions can be triggered:
 
-.. http:post:: /api/v1/organizers/(organizer)/events/(event)/invoices/(invoice_no)/reissue/
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/invoices/(number)/reissue/
 
    Cancels the invoice and creates a new one.
 
@@ -419,13 +419,13 @@ Invoices cannot be edited directly, but the following actions can be triggered:
 
    :param organizer: The ``slug`` field of the organizer to fetch
    :param event: The ``slug`` field of the event to fetch
-   :param invoice_no: The ``invoice_no`` field of the invoice to reissue
+   :param number: The ``number`` field of the invoice to reissue
    :statuscode 200: no error
    :statuscode 400: The invoice has already been canceled
    :statuscode 401: Authentication failure
    :statuscode 403: The requested organizer/event does not exist **or** you have no permission to change this resource.
 
-.. http:post:: /api/v1/organizers/(organizer)/events/(event)/invoices/(invoice_no)/regenerate/
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/invoices/(number)/regenerate/
 
    Re-generates the invoice from order data.
 
@@ -447,7 +447,7 @@ Invoices cannot be edited directly, but the following actions can be triggered:
 
    :param organizer: The ``slug`` field of the organizer to fetch
    :param event: The ``slug`` field of the event to fetch
-   :param invoice_no: The ``invoice_no`` field of the invoice to regenerate
+   :param number: The ``number`` field of the invoice to regenerate
    :statuscode 200: no error
    :statuscode 400: The invoice has already been canceled
    :statuscode 401: Authentication failure

doc/api/resources/orders.rst

@@ -104,6 +104,10 @@ url                                   string                     The full URL to
 payments                              list of objects            List of payment processes (see below)
 refunds                               list of objects            List of refund processes (see below)
 last_modified                         datetime                   Last modification of this object
+cancellation_date                     datetime                   Time of order cancellation (or ``null``). **Note**:
+                                                                 Will not be set for partial cancellations and is not
+                                                                 reliable for orders that have been cancelled,
+                                                                 reactivated and cancelled again.
 ===================================== ========================== =======================================================
 
 
@@ -151,6 +155,9 @@ last_modified                         datetime                   Last modificati
 
    The ``expires`` attribute can now be passed during order creation.
 
+.. versionchanged:: 2024.11
+
+   The ``cancellation_date`` attribute has been added and can also be used as an ordering key.
 
 .. _order-position-resource:
 
@@ -203,8 +210,20 @@ checkins                              list of objects            List of **succe
 ├ datetime                            datetime                   Time of check-in
 ├ type                                string                     Type of scan (defaults to ``entry``)
 ├ gate                                integer                    Internal ID of the gate. Can be ``null``.
-├ device                              integer                    Internal ID of the device. Can be ``null``.
+├ device                              integer                    Internal ID of the device. Can be ``null``. **Deprecated**, since this ID is not otherwise used in the API and is therefore not very useful.
+├ device_id                           integer                    Attribute ``device_id`` of the device. Can be ``null``.
 └ auto_checked_in                     boolean                    Indicates if this check-in been performed automatically by the system
+print_logs                            list of objects            List of print jobs recorded e.g. by the pretix apps
+├ id                                  integer                    Internal ID of the print job
+├ successful                          boolean                    Whether the print job successfully resulted in a print.
+                                                                 This is not expected to be 100 % reliable information (since
+                                                                 printer feedback is never perfect) and there is no guarantee
+                                                                 that unsuccessful jobs will be logged.
+├ device_id                           integer                    Attribute ``device_id`` of the device that recorded the print. Can be ``null``.
+├ datetime                            datetime                   Time of printing
+├ source                              string                     Source of print job, e.g. name of the app used.
+├ type                                string                     Type of print (currently ``badge``, ``ticket``, ``certificate``, or ``other``)
+└ info                                object                     Additional data with client-dependent structure.
 downloads                             list of objects            List of ticket download options
 ├ output                              string                     Ticket output provider (e.g. ``pdf``, ``passbook``)
 └ url                                 string                     Download URL
@@ -232,6 +251,10 @@ pdf_data                              object                     Data object req
 
    The attributes ``blocked``, ``valid_from`` and ``valid_until`` have been added.
 
+.. versionchanged:: 2024.9
+
+   The attribute ``print_logs`` has been added.
+
 .. _order-payment-resource:
 
 Order payment resource
@@ -398,10 +421,21 @@ List of all orders
                     "type": "entry",
                     "gate": null,
                     "device": 2,
+                    "device_id": 1,
                     "datetime": "2017-12-25T12:45:23Z",
                     "auto_checked_in": false
                   }
                 ],
+                "print_logs": [
+                  {
+                    "id": 1,
+                    "type": "badge",
+                    "datetime": "2017-12-25T12:45:23Z",
+                    "device_id": 1,
+                    "source": "pretixSCAN",
+                    "info": {}
+                  }
+                ],
                 "answers": [
                   {
                     "question": 12,
@@ -437,14 +471,15 @@ List of all orders
                 "provider": "banktransfer"
               }
             ],
-            "refunds": []
+            "refunds": [],
+            "cancellation_date": null
           }
         ]
       }
 
    :query integer page: The page number in case of a multi-page result set, default is 1
    :query string ordering: Manually set the ordering of results. Valid fields to be used are ``datetime``, ``code``,
-                           ``last_modified``, and ``status``. Default: ``datetime``
+                           ``last_modified``, ``status`` and ``cancellation_date``. Default: ``datetime``
    :query string code: Only return orders that match the given order code
    :query string status: Only return orders in the given order status (see above)
    :query string search: Only return orders matching a given search query (matching for names, email addresses, and company names)
@@ -625,10 +660,22 @@ Fetching individual orders
                 "type": "entry",
                 "gate": null,
                 "device": 2,
+                "device_id": 1,
                 "datetime": "2017-12-25T12:45:23Z",
                 "auto_checked_in": false
               }
             ],
+            "print_logs": [
+              {
+                "id": 1,
+                "type": "badge",
+                "successful": true,
+                "datetime": "2017-12-25T12:45:23Z",
+                "device_id": 1,
+                "source": "pretixSCAN",
+                "info": {}
+              }
+            ],
             "answers": [
               {
                 "question": 12,
@@ -664,7 +711,8 @@ Fetching individual orders
             "provider": "banktransfer"
           }
         ],
-        "refunds": []
+        "refunds": [],
+        "cancellation_date": null
       }
 
    :param organizer: The ``slug`` field of the organizer to fetch
@@ -976,8 +1024,8 @@ Creating orders
       * ``internal_reference``
       * ``vat_id``
       * ``vat_id_validated`` (optional) – If you need support for reverse charge (rarely the case), you need to check
-       yourself if the passed VAT ID is a valid EU VAT ID. In that case, set this to ``true``. Only valid VAT IDs will
-       trigger reverse charge taxation. Don't forget to set ``is_business`` as well!
+         yourself if the passed VAT ID is a valid EU VAT ID. In that case, set this to ``true``. Only valid VAT IDs will
+         trigger reverse charge taxation. Don't forget to set ``is_business`` as well!
 
    * ``positions``
 
@@ -1580,10 +1628,22 @@ List of all order positions
                 "type": "entry",
                 "gate": null,
                 "device": 2,
+                "device_id": 1,
                 "datetime": "2017-12-25T12:45:23Z",
                 "auto_checked_in": false
               }
             ],
+            "print_logs": [
+              {
+                "id": 1,
+                "type": "badge",
+                "successful": true,
+                "datetime": "2017-12-25T12:45:23Z",
+                "device_id": 1,
+                "source": "pretixSCAN",
+                "info": {}
+              }
+            ],
             "answers": [
               {
                 "question": 12,
@@ -1694,10 +1754,22 @@ Fetching individual positions
             "type": "entry",
             "gate": null,
             "device": 2,
+            "device_id": 1,
             "datetime": "2017-12-25T12:45:23Z",
             "auto_checked_in": false
           }
         ],
+        "print_logs": [
+          {
+            "id": 1,
+            "type": "badge",
+            "successful": true,
+            "datetime": "2017-12-25T12:45:23Z",
+            "device_id": 1,
+            "source": "pretixSCAN",
+            "info": {}
+          }
+        ],
         "answers": [
           {
             "question": 12,
@@ -1794,6 +1866,10 @@ Manipulating individual positions
 
    The endpoints to manage blocks have been added.
 
+.. versionchanged:: 2024.9
+
+   The API now supports logging ticket and badge prints.
+
 .. http:patch:: /api/v1/organizers/(organizer)/events/(event)/orderpositions/(id)/
 
    Updates specific fields on an order position. Currently, only the following fields are supported:
@@ -2053,6 +2129,59 @@ Manipulating individual positions
    :statuscode 401: Authentication failure
    :statuscode 403: The requested organizer/event does not exist **or** you have no permission to update this order position.
 
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/orderpositions/(id)/printlog/
+
+   Creates a print log, stating that this ticket has been printed.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      POST /api/v1/organizers/bigevents/events/sampleconf/orderpositions/23442/printlog/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+      Content-Type: application/json
+
+     {
+       "datetime": "2024-09-19T13:37:00+02:00",
+       "source": "pretixPOS",
+       "type": "badge",
+       "info": {
+         "cashier": 1234
+       }
+     }
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 201 Created
+      Vary: Accept
+      Content-Type: application/pdf
+
+     {
+       "id": 1234,
+       "device_id": null,
+       "datetime": "2024-09-19T13:37:00+02:00",
+       "source": "pretixPOS",
+       "type": "badge",
+       "info": {
+         "cashier": 1234
+       }
+     }
+
+   :param organizer: The ``slug`` field of the organizer to create a log for
+   :param event: The ``slug`` field of the event to create a log for
+   :param id: The ``id`` field of the order position to create a log for
+   :statuscode 201: no error
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view this resource
+                    **or** downloads are not available for this order position at this time. The response content will
+                    contain more details.
+   :statuscode 404: The requested order position or download provider does not exist.
+   :statuscode 409: The file is not yet ready and will now be prepared. Retry the request after waiting for a few
+                    seconds.
+
 Changing order contents
 -----------------------
 

doc/api/resources/saleschannels.rst

@@ -51,7 +51,7 @@ Endpoints
         "results": [
           {
             "identifier": "web",
-            "name": {
+            "label": {
               "en": "Online shop"
             },
             "type": "web",
@@ -88,7 +88,7 @@ Endpoints
 
       {
         "identifier": "web",
-        "name": {
+        "label": {
           "en": "Online shop"
         },
         "type": "web",
@@ -116,7 +116,7 @@ Endpoints
 
       {
         "identifier": "api.custom",
-        "name": {
+        "label": {
           "en": "Custom integration"
         },
         "type": "api",
@@ -133,7 +133,7 @@ Endpoints
 
       {
         "identifier": "api.custom",
-        "name": {
+        "label": {
           "en": "Custom integration"
         },
         "type": "api",
@@ -178,7 +178,7 @@ Endpoints
 
       {
         "identifier": "web",
-        "name": {
+        "label": {
           "en": "Online shop"
         },
         "type": "web",

doc/api/resources/scheduled_exports.rst

@@ -313,7 +313,7 @@ Endpoints for event exports
    :statuscode 403: The requested organizer/event does not exist **or** you have no permission to delete this resource.
 
 Endpoints for organizer exports
----------------------------
+-------------------------------
 
 .. http:get:: /api/v1/organizers/(organizer)/scheduled_exports/
 
@@ -553,4 +553,4 @@ Endpoints for organizer exports
    :statuscode 403: The requested organizer does not exist **or** you have no permission to delete this resource.
 
 
-.. _RFC 5545: https://datatracker.ietf.org/doc/html/rfc5545#section-3.8.5.3
+.. _RFC 5545: https://datatracker.ietf.org/doc/html/rfc5545#section-3.8.5.3

doc/api/resources/seats.rst

@@ -1,4 +1,4 @@
-.. _`rest-reusablemedia`:
+.. _`rest-seats`:
 
 Seats
 =====
@@ -249,7 +249,7 @@ Endpoints
             "orderposition": null,
             "cartposition": null,
             "voucher": null
-        },
+        }
 
    :param organizer: The ``slug`` field of the organizer to modify
    :param event: The ``slug`` field of the event to modify
@@ -260,3 +260,114 @@ Endpoints
    :statuscode 401: Authentication failure
    :statuscode 403: The requested organizer or event does not exist **or** you have no permission to change this resource.
    :statuscode 404: Seat does not exist; or the endpoint without subevent id was used for event with subevents, or vice versa.
+
+
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/seats/bulk_block/
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/subevents/(id)/seats/bulk_block/
+
+   Set the ``blocked`` attribute to ``true`` for a large number of seats at once.
+   You can pass either a list of ``id`` values or a list of ``seat_guid`` values.
+   You can pass up to 10,000 seats in one request.
+
+   The endpoint will return an error if you pass a seat ID that does not exist.
+   However, it will not return an error if one of the passed seats is already blocked or sold.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+        PATCH /api/v1/organizers/bigevents/events/sampleconf/seats/bulk_block/ HTTP/1.1
+        Host: pretix.eu
+        Accept: application/json, text/javascript
+        Content-Type: application/json
+
+        {
+            "ids": [12, 45, 56]
+        }
+
+   or
+
+   .. sourcecode:: http
+
+        PATCH /api/v1/organizers/bigevents/events/sampleconf/seats/bulk_block/ HTTP/1.1
+        Host: pretix.eu
+        Accept: application/json, text/javascript
+        Content-Type: application/json
+
+        {
+            "seat_guids": ["6c0e29e5-05d6-421f-99f3-afd01478ecad", "c2899340-e2e7-4d05-8100-000a4b6d7cf4"]
+        }
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+        HTTP/1.1 200 OK
+        Vary: Accept
+        Content-Type: application/json
+
+        {}
+
+   :param organizer: The ``slug`` field of the organizer to modify
+   :param event: The ``slug`` field of the event to modify
+   :param subevent_id: The ``id`` field of the subevent to modify
+   :statuscode 200: no error
+   :statuscode 400: The seat could not be modified due to invalid submitted data
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer or event does not exist **or** you have no permission to change this resource.
+   :statuscode 404: Seat does not exist; or the endpoint without subevent id was used for event with subevents, or vice versa.
+
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/seats/bulk_unblock/
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/subevents/(id)/seats/bulk_unblock/
+
+   Set the ``blocked`` attribute to ``false`` for a large number of seats at once.
+   You can pass either a list of ``id`` values or a list of ``seat_guid`` values.
+   You can pass up to 10,000 seats in one request.
+
+   The endpoint will return an error if you pass a seat ID that does not exist.
+   However, it will not return an error if one of the passed seat is already unblocked or is sold.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+        PATCH /api/v1/organizers/bigevents/events/sampleconf/seats/bulk_unblock/ HTTP/1.1
+        Host: pretix.eu
+        Accept: application/json, text/javascript
+        Content-Type: application/json
+
+        {
+            "ids": [12, 45, 56]
+        }
+
+   or
+
+   .. sourcecode:: http
+
+        PATCH /api/v1/organizers/bigevents/events/sampleconf/seats/bulk_unblock/ HTTP/1.1
+        Host: pretix.eu
+        Accept: application/json, text/javascript
+        Content-Type: application/json
+
+        {
+            "seat_guids": ["6c0e29e5-05d6-421f-99f3-afd01478ecad", "c2899340-e2e7-4d05-8100-000a4b6d7cf4"]
+        }
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+        HTTP/1.1 200 OK
+        Vary: Accept
+        Content-Type: application/json
+
+        {}
+
+   :param organizer: The ``slug`` field of the organizer to modify
+   :param event: The ``slug`` field of the event to modify
+   :param subevent_id: The ``id`` field of the subevent to modify
+   :statuscode 200: no error
+   :statuscode 400: The seat could not be modified due to invalid submitted data
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer or event does not exist **or** you have no permission to change this resource.
+   :statuscode 404: Seat does not exist; or the endpoint without subevent id was used for event with subevents, or vice versa.

doc/api/resources/subevents.rst

@@ -136,6 +136,7 @@ Endpoints
       }
 
    :query page: The page number in case of a multi-page result set, default is 1
+   :query is_public: If set to ``true``/``false``, only subevents with a matching value of ``is_public`` are returned.
    :query active: If set to ``true``/``false``, only events with a matching value of ``active`` are returned.
    :query is_future: If set to ``true`` (``false``), only events that happen currently or in the future are (not) returned.
    :query is_past: If set to ``true`` (``false``), only events that are over are (not) returned.
@@ -467,6 +468,7 @@ Endpoints
       }
 
    :query page: The page number in case of a multi-page result set, default is 1
+   :query is_public: If set to ``true``/``false``, only subevents with a matching value of ``is_public`` are returned.
    :query active: If set to ``true``/``false``, only events with a matching value of ``active`` are returned.
    :query event__live: If set to ``true``/``false``, only events with a matching value of ``live`` on the parent event are returned.
    :query is_future: If set to ``true`` (``false``), only events that happen currently or in the future are (not) returned.

doc/api/resources/taxrules.rst

@@ -20,8 +20,9 @@ internal_name                         string                     An optional nam
 rate                                  decimal (string)           Tax rate in percent
 price_includes_tax                    boolean                    If ``true`` (default), tax is assumed to be included in
                                                                  the specified product price
-eu_reverse_charge                     boolean                    If ``true``, EU reverse charge rules are applied. Will
-                                                                 be ignored if custom rules are set.
+eu_reverse_charge                     boolean                    **DEPRECATED**. If ``true``, EU reverse charge rules
+                                                                 are applied. Will be ignored if custom rules are set.
+                                                                 Use custom rules instead.
 home_country                          string                     Merchant country (required for reverse charge), can be
                                                                  ``null`` or empty string
 keep_gross_if_rate_changes            boolean                    If ``true``, changes of the tax rate based on custom

doc/development/api/cookieconsent.rst

@@ -17,6 +17,7 @@ First, you need to declare that you are using non-essential cookies by respondin
 signal:
 
 .. automodule:: pretix.presale.signals
+   :no-index:
    :members: register_cookie_providers
 
 You are expected to return a list of ``CookieProvider`` objects instantiated from the following class:

doc/development/api/general.rst

@@ -14,7 +14,7 @@ Core
    :members: periodic_task, event_live_issues, event_copy_data, email_filter, register_notification_types, notification,
       item_copy_data, register_sales_channel_types, register_global_settings, quota_availability, global_email_filter,
       register_ticket_secret_generators, gift_card_transaction_display,
-      register_text_placeholders, register_mail_placeholders
+      register_text_placeholders, register_mail_placeholders, device_info_updated
 
 Order events
 """"""""""""
@@ -22,12 +22,14 @@ Order events
 There are multiple signals that will be sent out in the ordering cycle:
 
 .. automodule:: pretix.base.signals
+   :no-index:
    :members: validate_cart, validate_cart_addons, validate_order, order_valid_if_pending, order_fee_calculation, order_paid, order_placed, order_canceled, order_reactivated, order_expired, order_modified, order_changed, order_approved, order_denied, order_fee_type_name, allow_ticket_download, order_split, order_gracefully_delete, invoice_line_text
 
 Check-ins
 """""""""
 
 .. automodule:: pretix.base.signals
+   :no-index:
    :members: checkin_created
 
 
@@ -39,18 +41,21 @@ Frontend
 
 
 .. automodule:: pretix.presale.signals
+   :no-index:
    :members: order_info, order_info_top, order_meta_from_request, order_api_meta_from_request
 
 Request flow
 """"""""""""
 
 .. automodule:: pretix.presale.signals
+   :no-index:
    :members: process_request, process_response
 
 Vouchers
 """"""""
 
 .. automodule:: pretix.presale.signals
+   :no-index:
    :members: voucher_redeem_info
 
 Backend
@@ -62,24 +67,28 @@ Backend
              item_formsets, order_search_filter_q, order_search_forms
 
 .. automodule:: pretix.base.signals
+   :no-index:
    :members: logentry_display, logentry_object_link, requiredaction_display, timeline_events, orderposition_blocked_display, customer_created, customer_signed_in
 
 Vouchers
 """"""""
 
 .. automodule:: pretix.control.signals
+   :no-index:
    :members: item_forms, voucher_form_class, voucher_form_html, voucher_form_validation
 
 Dashboards
 """"""""""
 
 .. automodule:: pretix.control.signals
+   :no-index:
    :members: event_dashboard_widgets, user_dashboard_widgets, event_dashboard_top
 
 Ticket designs
 """"""""""""""
 
 .. automodule:: pretix.base.signals
+   :no-index:
    :members: layout_text_variables, layout_image_variables
 
 .. automodule:: pretix.plugins.ticketoutputpdf.signals
@@ -89,4 +98,9 @@ API
 ---
 
 .. automodule:: pretix.base.signals
+   :no-index:
    :members: validate_event_settings, api_event_settings_fields
+
+.. automodule:: pretix.api.signals
+   :no-index:
+   :members: register_device_security_profile

doc/development/api/import.rst

@@ -60,6 +60,7 @@ that we'll provide in this plugin:
 Similar signals exist for other objects:
 
 .. automodule:: pretix.base.signals
+   :no-index:
    :members: voucher_import_columns
 
 

doc/development/api/invoice.rst

@@ -84,8 +84,6 @@ convenient to you:
 
    .. automethod:: _register_fonts
 
-   .. automethod:: _register_event_fonts
-
    .. automethod:: _on_first_page
 
    .. automethod:: _on_other_page

doc/development/api/placeholder.rst

@@ -86,7 +86,10 @@ Signals
 -------
 
 .. automodule:: pretix.base.signals
+   :no-index:
    :members: register_text_placeholders
+
 .. automodule:: pretix.base.signals
+   :no-index:
    :members: register_mail_placeholders
 

doc/plugins/kulturpass.rst

@@ -1,5 +1,5 @@
 KulturPass
-=========
+==========
 
 .. note::
 

doc/plugins/presale-saml.rst

@@ -158,7 +158,7 @@ expects and - more importantly - supports.
     for a sample configuration in an academic context.
 
     Note, that you can have multiple attributes with the same ``friendlyName``
-    but different ``name``s. This is often used in systems, where the same
+    but different ``name`` value. This is often used in systems, where the same
     information (for example a persons name) is saved in different fields -
     for example because one institution is returning SAML 1.0 and other
     institutions are returning SAML 2.0 style attributes. Typically, this only

doc/plugins/ticketoutputpdf.rst

@@ -29,8 +29,8 @@ item_assignments                      list of objects            Products this l
 ===================================== ========================== =======================================================
 
 
-Endpoints
----------
+Layout endpoints
+----------------
 
 .. http:get:: /api/v1/organizers/(organizer)/events/(event)/ticketlayouts/
 
@@ -268,5 +268,75 @@ Endpoints
    :statuscode 401: Authentication failure
    :statuscode 403: The requested organizer/event does not exist **or** you have no permission to delete this resource.
 
+Ticket rendering endpoint
+-----------------------------
+
+.. http:post:: /api/v1/organizers/(organizer)/events/(event)/ticketpdfrenderer/render_batch/
+
+   With this API call, you can instruct the system to render a set of tickets into one combined PDF file. To specify
+   which tickets to render, you need to submit a list of "parts". For every part, the following fields are supported:
+
+   * ``orderposition`` (``integer``, required): The ID of the order position to render.
+   * ``override_channel`` (``string``, optional): The sales channel ID to be used for layout selection instead of the
+     original channel of the order.
+   * ``override_layout`` (``integer``, optional): The ticket layout ID to be used instead of the auto-selected one.
+
+   If your input parameters validate correctly, a ``202 Accepted`` status code is returned.
+   The body points you to the download URL of the result. Running a ``GET`` request on that result URL will
+   yield one of the following status codes:
+
+    * ``200 OK`` – The export succeeded. The body will be your resulting file. Might be large!
+    * ``409 Conflict`` – Your export is still running. The body will be JSON with the structure ``{"status": "running"}``. ``status`` can be ``waiting`` before the task is actually being processed. Please retry, but wait at least one second before you do.
+    * ``410 Gone`` – Running the export has failed permanently. The body will be JSON with the structure ``{"status": "failed", "message": "Error message"}``
+    * ``404 Not Found`` – The export does not exist / is expired.
+
+   .. warning:: This endpoint is considered **experimental**. It might change at any time without prior notice.
+
+   .. note:: To avoid performance issues, a maximum number of 1000 parts is currently allowed.
+
+   **Example request**:
+
+   .. sourcecode:: http
+
+      POST /api/v1/organizers/bigevents/events/sampleconf/ticketpdfrenderer/render_batch/ HTTP/1.1
+      Host: pretix.eu
+      Accept: application/json, text/javascript
+      Content-Type: application/json
+
+      {
+        "parts": [
+          {
+            "orderposition": 55412
+          },
+          {
+            "orderposition": 55412,
+            "override_channel": "web"
+          },
+          {
+            "orderposition": 55412,
+            "override_layout": 56
+          }
+        ]
+      }
+
+   **Example response**:
+
+   .. sourcecode:: http
+
+      HTTP/1.1 200 OK
+      Vary: Accept
+      Content-Type: application/json
+
+      {
+        "download": "https://pretix.eu/api/v1/organizers/bigevents/events/sampleconf/ticketpdfrenderer/download/29891ede-196f-4942-9e26-d055a36e98b8/3f279f13-c198-4137-b49b-9b360ce9fcce/"
+      }
+
+   :param organizer: The ``slug`` field of the organizer to fetch
+   :param event: The ``slug`` field of the event to fetch
+   :statuscode 202: no error
+   :statuscode 400: Invalid input options
+   :statuscode 401: Authentication failure
+   :statuscode 403: The requested organizer/event does not exist **or** you have no permission to view this resource.
+
 
 .. _here: https://github.com/pretix/pretix/blob/master/src/pretix/static/schema/pdf-layout.schema.json

doc/user/customers/index.rst

@@ -175,7 +175,7 @@ without any special behavior.
 Connecting SSO providers (pretix as the SSO client)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-To connect an external application as a SSO client, go to "Customer accounts" → "SSO providers" → "Create a new SSO provider"
+To connect an external application as a SSO provider, go to "Customer accounts" → "SSO providers" → "Create a new SSO provider"
 in your organizer account.
 
 .. thumbnail:: ../../screens/organizer/customer_ssoprovider_add.png

pyproject.toml

@@ -29,21 +29,21 @@ dependencies = [
   "arabic-reshaper==3.0.0",  # Support for Arabic in reportlab
   "babel",
   "BeautifulSoup4==4.12.*",
-  "bleach==5.0.*",
+  "bleach==6.2.*",
   "celery==5.4.*",
   "chardet==5.2.*",
   "cryptography>=3.4.2",
   "css-inline==0.14.*",
   "defusedcsv>=1.1.0",
   "Django[argon2]==4.2.*,>=4.2.15",
-  "django-bootstrap3==24.2",
+  "django-bootstrap3==24.3",
   "django-compressor==4.5.1",
   "django-countries==7.6.*",
   "django-filter==24.3",
   "django-formset-js-improved==0.5.0.3",
   "django-formtools==2.5.1",
   "django-hierarkey==1.2.*",
-  "django-hijack==3.6.*",
+  "django-hijack==3.7.*",
   "django-i18nfield==1.9.*,>=1.9.4",
   "django-libsass==0.9",
   "django-localflavor==4.0",
@@ -53,9 +53,9 @@ dependencies = [
   "django-phonenumber-field==7.3.*",
   "django-redis==5.4.*",
   "django-scopes==2.0.*",
-  "django-statici18n==2.5.*",
+  "django-statici18n==2.6.*",
   "djangorestframework==3.15.*",
-  "dnspython==2.6.*",
+  "dnspython==2.7.*",
   "drf_ujson2==1.7.*",
   "geoip2==4.*",
   "importlib_metadata==8.*",  # Polyfill, we can probably drop this once we require Python 3.10+
@@ -74,55 +74,53 @@ dependencies = [
   "paypal-checkout-serversdk==1.0.*",
   "PyJWT==2.9.*",
   "phonenumberslite==8.13.*",
-  "Pillow==10.4.*",
+  "Pillow==11.0.*",
   "pretix-plugin-build",
-  "protobuf==5.27.*",
+  "protobuf==5.29.*",
   "psycopg2-binary",
   "pycountry",
   "pycparser==2.22",
-  "pycryptodome==3.20.*",
-  "pypdf==4.3.*",
+  "pycryptodome==3.21.*",
+  "pypdf==5.1.*",
   "python-bidi==0.6.*",  # Support for Arabic in reportlab
   "python-dateutil==2.9.*",
   "pytz",
   "pytz-deprecation-shim==0.1.*",
   "pyuca",
-  "qrcode==7.4.*",
-  "redis==5.0.*",
+  "qrcode==8.0",
+  "redis==5.2.*",
   "reportlab==4.2.*",
   "requests==2.31.*",
-  "sentry-sdk==2.13.*",
+  "sentry-sdk==2.18.*",
   "sepaxml==2.6.*",
-  "slimit",
   "stripe==7.9.*",
   "text-unidecode==1.*",
   "tlds>=2020041600",
   "tqdm==4.*",
-  "ua-parser==0.18.*",
+  "ua-parser==1.0.*",
   "vat_moss_forked==2020.3.20.0.11.0",
   "vobject==0.9.*",
-  "webauthn==2.2.*",
-  "zeep==4.2.*"
+  "webauthn==2.3.*",
+  "zeep==4.3.*"
 ]
 
 [project.optional-dependencies]
 memcached = ["pylibmc"]
 dev = [
-  "aiohttp==3.10.*",
+  "aiohttp==3.11.*",
   "coverage",
   "coveralls",
-  "fakeredis==2.24.*",
+  "fakeredis==2.26.*",
   "flake8==7.1.*",
   "freezegun",
   "isort==5.13.*",
   "pep8-naming==0.14.*",
   "potypo",
-  "pytest-asyncio",
+  "pytest-asyncio>=0.24",
   "pytest-cache",
   "pytest-cov",
   "pytest-django==4.*",
   "pytest-mock==3.14.*",
-  "pytest-rerunfailures==14.*",
   "pytest-sugar",
   "pytest-xdist==3.6.*",
   "pytest==8.3.*",

src/pretix/__init__.py

@@ -19,4 +19,4 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
-__version__ = "2024.8.0"
+__version__ = "2024.12.0.dev0"

src/pretix/_base_settings.py

@@ -80,6 +80,7 @@ ALL_LANGUAGES = [
     ('de', _('German')),
     ('de-informal', _('German (informal)')),
     ('ar', _('Arabic')),
+    ('eu', _('Basque')),
     ('ca', _('Catalan')),
     ('zh-hans', _('Chinese (simplified)')),
     ('zh-hant', _('Chinese (traditional)')),

src/pretix/api/auth/device.py

@@ -27,7 +27,7 @@ from rest_framework import exceptions
 from rest_framework.authentication import TokenAuthentication
 
 from pretix.api.auth.devicesecurity import (
-    DEVICE_SECURITY_PROFILES, FullAccessSecurityProfile,
+    FullAccessSecurityProfile, get_all_security_profiles,
 )
 from pretix.base.models import Device
 
@@ -58,7 +58,8 @@ class DeviceTokenAuthentication(TokenAuthentication):
     def authenticate(self, request):
         r = super().authenticate(request)
         if r and isinstance(r[1], Device):
-            profile = DEVICE_SECURITY_PROFILES.get(r[1].security_profile, FullAccessSecurityProfile)
+            profiles = get_all_security_profiles()
+            profile = profiles.get(r[1].security_profile, FullAccessSecurityProfile())
             if not profile.is_allowed(request):
                 raise exceptions.PermissionDenied('Request denied by device security profile.')
         return r

src/pretix/api/auth/devicesecurity.py

@@ -20,13 +20,40 @@
 # <https://www.gnu.org/licenses/>.
 #
 import logging
+from collections import OrderedDict
 
+from django.dispatch import receiver
 from django.utils.translation import gettext_lazy as _
 
+from pretix.api.signals import register_device_security_profile
+
 logger = logging.getLogger(__name__)
+_ALL_PROFILES = None
 
 
-class FullAccessSecurityProfile:
+class BaseSecurityProfile:
+    @property
+    def identifier(self) -> str:
+        """
+        Unique identifier for this profile.
+        """
+        raise NotImplementedError()
+
+    @property
+    def verbose_name(self) -> str:
+        """
+        Human-readable name (can be a ``gettext_lazy`` object).
+        """
+        raise NotImplementedError()
+
+    def is_allowed(self, request) -> bool:
+        """
+        Return whether a given request should be allowed.
+        """
+        raise NotImplementedError()
+
+
+class FullAccessSecurityProfile(BaseSecurityProfile):
     identifier = 'full'
     verbose_name = _('Full device access (reading and changing orders and gift cards, reading of products and settings)')
 
@@ -34,7 +61,7 @@ class FullAccessSecurityProfile:
         return True
 
 
-class AllowListSecurityProfile:
+class AllowListSecurityProfile(BaseSecurityProfile):
     allowlist = ()
 
     def is_allowed(self, request):
@@ -77,6 +104,7 @@ class PretixScanSecurityProfile(AllowListSecurityProfile):
         ('GET', 'api-v1:blockedsecrets-list'),
         ('GET', 'api-v1:order-list'),
         ('GET', 'api-v1:orderposition-pdf_image'),
+        ('POST', 'api-v1:orderposition-printlog'),
         ('GET', 'api-v1:event.settings'),
         ('POST', 'api-v1:upload'),
         ('POST', 'api-v1:checkinrpc.redeem'),
@@ -112,6 +140,7 @@ class PretixScanNoSyncNoSearchSecurityProfile(AllowListSecurityProfile):
         ('GET', 'api-v1:revokedsecrets-list'),
         ('GET', 'api-v1:blockedsecrets-list'),
         ('GET', 'api-v1:orderposition-pdf_image'),
+        ('POST', 'api-v1:orderposition-printlog'),
         ('GET', 'api-v1:event.settings'),
         ('POST', 'api-v1:upload'),
         ('POST', 'api-v1:checkinrpc.redeem'),
@@ -147,6 +176,7 @@ class PretixScanNoSyncSecurityProfile(AllowListSecurityProfile):
         ('GET', 'api-v1:revokedsecrets-list'),
         ('GET', 'api-v1:blockedsecrets-list'),
         ('GET', 'api-v1:orderposition-pdf_image'),
+        ('POST', 'api-v1:orderposition-printlog'),
         ('GET', 'api-v1:event.settings'),
         ('POST', 'api-v1:upload'),
         ('POST', 'api-v1:checkinrpc.redeem'),
@@ -154,87 +184,28 @@ class PretixScanNoSyncSecurityProfile(AllowListSecurityProfile):
     )
 
 
-class PretixPosSecurityProfile(AllowListSecurityProfile):
-    identifier = 'pretixpos'
-    verbose_name = _('pretixPOS')
-    allowlist = (
-        ('GET', 'api-v1:version'),
-        ('GET', 'api-v1:device.eventselection'),
-        ('GET', 'api-v1:idempotency.query'),
-        ('GET', 'api-v1:device.info'),
-        ('POST', 'api-v1:device.update'),
-        ('POST', 'api-v1:device.revoke'),
-        ('POST', 'api-v1:device.roll'),
-        ('GET', 'api-v1:event-list'),
-        ('GET', 'api-v1:event-detail'),
-        ('GET', 'api-v1:subevent-list'),
-        ('GET', 'api-v1:subevent-detail'),
-        ('GET', 'api-v1:itemcategory-list'),
-        ('GET', 'api-v1:item-list'),
-        ('GET', 'api-v1:question-list'),
-        ('GET', 'api-v1:quota-list'),
-        ('GET', 'api-v1:taxrule-list'),
-        ('GET', 'api-v1:ticketlayout-list'),
-        ('GET', 'api-v1:ticketlayoutitem-list'),
-        ('GET', 'api-v1:badgelayout-list'),
-        ('GET', 'api-v1:badgeitem-list'),
-        ('GET', 'api-v1:voucher-list'),
-        ('GET', 'api-v1:voucher-detail'),
-        ('GET', 'api-v1:order-list'),
-        ('POST', 'api-v1:order-list'),
-        ('GET', 'api-v1:order-detail'),
-        ('DELETE', 'api-v1:orderposition-detail'),
-        ('PATCH', 'api-v1:orderposition-detail'),
-        ('GET', 'api-v1:orderposition-list'),
-        ('GET', 'api-v1:orderposition-answer'),
-        ('GET', 'api-v1:orderposition-pdf_image'),
-        ('POST', 'api-v1:order-mark-canceled'),
-        ('POST', 'api-v1:orderpayment-list'),
-        ('POST', 'api-v1:orderrefund-list'),
-        ('POST', 'api-v1:orderrefund-done'),
-        ('POST', 'api-v1:cartposition-list'),
-        ('POST', 'api-v1:cartposition-bulk-create'),
-        ('GET', 'api-v1:checkinlist-list'),
-        ('POST', 'api-v1:checkinlistpos-redeem'),
-        ('POST', 'plugins:pretix_posbackend:order.posprintlog'),
-        ('POST', 'plugins:pretix_posbackend:order.poslock'),
-        ('DELETE', 'plugins:pretix_posbackend:order.poslock'),
-        ('DELETE', 'api-v1:cartposition-detail'),
-        ('GET', 'api-v1:giftcard-list'),
-        ('POST', 'api-v1:giftcard-transact'),
-        ('PATCH', 'api-v1:giftcard-detail'),
-        ('GET', 'plugins:pretix_posbackend:posclosing-list'),
-        ('POST', 'plugins:pretix_posbackend:posreceipt-list'),
-        ('POST', 'plugins:pretix_posbackend:posclosing-list'),
-        ('POST', 'plugins:pretix_posbackend:posdebugdump-list'),
-        ('POST', 'plugins:pretix_posbackend:posdebuglogentry-list'),
-        ('POST', 'plugins:pretix_posbackend:posdebuglogentry-bulk-create'),
-        ('GET', 'plugins:pretix_posbackend:poscashier-list'),
-        ('POST', 'plugins:pretix_posbackend:stripeterminal.token'),
-        ('POST', 'plugins:pretix_posbackend:stripeterminal.paymentintent'),
-        ('PUT', 'plugins:pretix_posbackend:file.upload'),
-        ('GET', 'api-v1:revokedsecrets-list'),
-        ('GET', 'api-v1:blockedsecrets-list'),
-        ('GET', 'api-v1:event.settings'),
-        ('GET', 'plugins:pretix_seating:event.event'),
-        ('GET', 'plugins:pretix_seating:event.event.subevent'),
-        ('GET', 'plugins:pretix_seating:event.plan'),
-        ('GET', 'plugins:pretix_seating:selection.simple'),
-        ('POST', 'api-v1:upload'),
-        ('POST', 'api-v1:checkinrpc.redeem'),
-        ('GET', 'api-v1:checkinrpc.search'),
-        ('POST', 'api-v1:reusablemedium-lookup'),
-        ('GET', 'api-v1:reusablemedium-list'),
-        ('POST', 'api-v1:reusablemedium-list'),
-    )
+def get_all_security_profiles():
+    global _ALL_PROFILES
+
+    if _ALL_PROFILES:
+        return _ALL_PROFILES
+
+    types = OrderedDict()
+    for recv, ret in register_device_security_profile.send(None):
+        if isinstance(ret, (list, tuple)):
+            for r in ret:
+                types[r.identifier] = r
+        else:
+            types[ret.identifier] = ret
+    _ALL_PROFILES = types
+    return types
 
 
-DEVICE_SECURITY_PROFILES = {
-    k.identifier: k() for k in (
-        FullAccessSecurityProfile,
-        PretixScanSecurityProfile,
-        PretixScanNoSyncSecurityProfile,
-        PretixScanNoSyncNoSearchSecurityProfile,
-        PretixPosSecurityProfile,
+@receiver(register_device_security_profile, dispatch_uid="base_register_default_security_profiles")
+def register_default_webhook_events(sender, **kwargs):
+    return (
+        FullAccessSecurityProfile(),
+        PretixScanSecurityProfile(),
+        PretixScanNoSyncSecurityProfile(),
+        PretixScanNoSyncNoSearchSecurityProfile(),
     )
-}

src/pretix/api/serializers/__init__.py

@@ -88,16 +88,20 @@ class SalesChannelMigrationMixin:
             }
 
             if data.get("all_sales_channels") and set(data["sales_channels"]) != all_channels:
-                raise ValidationError(
-                    "If 'all_sales_channels' is set, the legacy attribute 'sales_channels' must not be set or set to "
-                    "the list of all sales channels."
-                )
+                raise ValidationError({
+                    "limit_sales_channels": [
+                        "If 'all_sales_channels' is set, the legacy attribute 'sales_channels' must not be set or set to "
+                        "the list of all sales channels."
+                    ]
+                })
 
             if data.get("limit_sales_channels") and set(data["sales_channels"]) != set(data["limit_sales_channels"]):
-                raise ValidationError(
-                    "If 'limit_sales_channels' is set, the legacy attribute 'sales_channels' must not be set or set to "
-                    "the same list."
-                )
+                raise ValidationError({
+                    "limit_sales_channels": [
+                        "If 'limit_sales_channels' is set, the legacy attribute 'sales_channels' must not be set or set to "
+                        "the same list."
+                    ]
+                })
 
             if data["sales_channels"] == all_channels:
                 data["all_sales_channels"] = True
@@ -106,6 +110,10 @@ class SalesChannelMigrationMixin:
                 data["all_sales_channels"] = False
                 data["limit_sales_channels"] = data["sales_channels"]
             del data["sales_channels"]
+
+        if data.get("all_sales_channels"):
+            data["limit_sales_channels"] = []
+
         return super().to_internal_value(data)
 
     def to_representation(self, value):

src/pretix/api/serializers/cart.py

@@ -235,7 +235,7 @@ class CartPositionCreateSerializer(BaseCartPositionCreateSerializer):
         return cid
 
     def create(self, validated_data):
-        validated_data.pop('sales_channel')
+        validated_data.pop('sales_channel', None)
         addons_data = validated_data.pop('addons', None)
         bundled_data = validated_data.pop('bundled', None)
 

src/pretix/api/serializers/checkin.py

@@ -26,31 +26,22 @@ from rest_framework.exceptions import ValidationError
 from pretix.api.serializers.event import SubEventSerializer
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
 from pretix.base.media import MEDIA_TYPES
-from pretix.base.models import Checkin, CheckinList, SalesChannel
+from pretix.base.models import Checkin, CheckinList
 
 
 class CheckinListSerializer(I18nAwareModelSerializer):
     checkin_count = serializers.IntegerField(read_only=True)
     position_count = serializers.IntegerField(read_only=True)
-    auto_checkin_sales_channels = serializers.SlugRelatedField(
-        slug_field="identifier",
-        queryset=SalesChannel.objects.none(),
-        required=False,
-        allow_empty=True,
-        many=True,
-    )
 
     class Meta:
         model = CheckinList
         fields = ('id', 'name', 'all_products', 'limit_products', 'subevent', 'checkin_count', 'position_count',
-                  'include_pending', 'auto_checkin_sales_channels', 'allow_multiple_entries', 'allow_entry_after_exit',
+                  'include_pending', 'allow_multiple_entries', 'allow_entry_after_exit',
                   'rules', 'exit_all_at', 'addon_match', 'ignore_in_statistics', 'consider_tickets_used')
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
-        self.fields['auto_checkin_sales_channels'].child_relation.queryset = self.context['event'].organizer.sales_channels.all()
-
         if 'subevent' in self.context['request'].query_params.getlist('expand'):
             self.fields['subevent'] = SubEventSerializer(read_only=True)
 

src/pretix/api/serializers/event.py

@@ -772,6 +772,7 @@ class EventSettingsSerializer(SettingsSerializer):
         'invoice_address_company_required',
         'invoice_address_beneficiary',
         'invoice_address_custom_field',
+        'invoice_address_custom_field_helptext',
         'invoice_name_required',
         'invoice_address_not_asked_free',
         'invoice_show_payments',
@@ -896,6 +897,7 @@ class DeviceEventSettingsSerializer(EventSettingsSerializer):
         'locale',
         'last_order_modification_date',
         'show_quota_left',
+        'show_dates_on_frontpage',
         'max_items_per_order',
         'attendee_names_asked',
         'attendee_names_required',
@@ -915,6 +917,7 @@ class DeviceEventSettingsSerializer(EventSettingsSerializer):
         'invoice_address_company_required',
         'invoice_address_beneficiary',
         'invoice_address_custom_field',
+        'invoice_address_custom_field_helptext',
         'invoice_name_required',
         'invoice_address_not_asked_free',
         'invoice_address_from_name',
@@ -986,6 +989,40 @@ def prefetch_by_id(items, qs, id_attr, target_attr):
             setattr(item, target_attr, result.get(getattr(item, id_attr)))
 
 
+class SeatBulkBlockInputSerializer(serializers.Serializer):
+    ids = serializers.ListField(child=serializers.IntegerField(), required=False, allow_empty=True)
+    seat_guids = serializers.ListField(child=serializers.CharField(), required=False, allow_empty=True)
+
+    def to_internal_value(self, data):
+        data = super().to_internal_value(data)
+
+        if data.get("seat_guids") and data.get("ids"):
+            raise ValidationError("Please pass either seat_guids or ids.")
+
+        if data.get("seat_guids"):
+            seat_ids = data["seat_guids"]
+            if len(seat_ids) > 10000:
+                raise ValidationError({"seat_guids": ["Please do not pass over 10000 seats."]})
+
+            seats = {s.seat_guid: s for s in self.context["queryset"].filter(seat_guid__in=seat_ids)}
+            for s in seat_ids:
+                if s not in seats:
+                    raise ValidationError({"seat_guids": [f"The seat '{s}' does not exist."]})
+        elif data.get("ids"):
+            seat_ids = data["ids"]
+            if len(seat_ids) > 10000:
+                raise ValidationError({"ids": ["Please do not pass over 10000 seats."]})
+
+            seats = self.context["queryset"].in_bulk(seat_ids)
+            for s in seat_ids:
+                if s not in seats:
+                    raise ValidationError({"ids": [f"The seat '{s}' does not exist."]})
+        else:
+            raise ValidationError("Please pass either seat_guids or ids.")
+
+        return {"seats": seats.values()}
+
+
 class SeatSerializer(I18nAwareModelSerializer):
     orderposition = serializers.IntegerField(source='orderposition_id')
     cartposition = serializers.IntegerField(source='cartposition_id')

src/pretix/api/serializers/item.py

@@ -369,7 +369,7 @@ class ItemSerializer(SalesChannelMigrationMixin, I18nAwareModelSerializer):
         require_membership_types = validated_data.pop('require_membership_types', [])
         limit_sales_channels = validated_data.pop('limit_sales_channels', [])
         item = Item.objects.create(**validated_data)
-        if limit_sales_channels:
+        if limit_sales_channels and not validated_data.get('all_sales_channels'):
             item.limit_sales_channels.add(*limit_sales_channels)
         if picture:
             item.picture.save(os.path.basename(picture.name), picture)
@@ -441,7 +441,22 @@ class ItemCategorySerializer(I18nAwareModelSerializer):
 
     class Meta:
         model = ItemCategory
-        fields = ('id', 'name', 'internal_name', 'description', 'position', 'is_addon')
+        fields = (
+            'id', 'name', 'internal_name', 'description', 'position',
+            'is_addon', 'cross_selling_mode',
+            'cross_selling_condition', 'cross_selling_match_products'
+        )
+
+    def validate(self, data):
+        data = super().validate(data)
+
+        full_data = self.to_internal_value(self.to_representation(self.instance)) if self.instance else {}
+        full_data.update(data)
+
+        if full_data.get('is_addon') and full_data.get('cross_selling_mode'):
+            raise ValidationError('is_addon and cross_selling_mode are mutually exclusive')
+
+        return data
 
 
 class QuestionOptionSerializer(I18nAwareModelSerializer):

src/pretix/api/serializers/order.py

@@ -55,7 +55,7 @@ from pretix.base.models import (
 )
 from pretix.base.models.orders import (
     BlockedTicketSecret, CartPosition, OrderFee, OrderPayment, OrderRefund,
-    RevokedTicketSecret,
+    PrintLog, RevokedTicketSecret,
 )
 from pretix.base.pdf import get_images, get_variables
 from pretix.base.services.cart import error_messages
@@ -273,9 +273,35 @@ class AnswerSerializer(I18nAwareModelSerializer):
 
 
 class CheckinSerializer(I18nAwareModelSerializer):
+    device_id = serializers.SlugRelatedField(
+        source='device',
+        slug_field='device_id',
+        read_only=True,
+    )
+
     class Meta:
         model = Checkin
-        fields = ('id', 'datetime', 'list', 'auto_checked_in', 'gate', 'device', 'type')
+        fields = ('id', 'datetime', 'list', 'auto_checked_in', 'gate', 'device', 'device_id', 'type')
+
+
+class PrintLogSerializer(serializers.ModelSerializer):
+    device_id = serializers.SlugRelatedField(
+        source='device',
+        slug_field='device_id',
+        read_only=True,
+    )
+
+    class Meta:
+        model = PrintLog
+        fields = (
+            "id",
+            "successful",
+            "datetime",
+            "source",
+            "type",
+            "device_id",
+            "info",
+        )
 
 
 class FailedCheckinSerializer(I18nAwareModelSerializer):
@@ -470,6 +496,7 @@ class OrderPositionListSerializer(serializers.ListSerializer):
 
 class OrderPositionSerializer(I18nAwareModelSerializer):
     checkins = CheckinSerializer(many=True, read_only=True)
+    print_logs = PrintLogSerializer(many=True, read_only=True)
     answers = AnswerSerializer(many=True)
     downloads = PositionDownloadsField(source='*', read_only=True)
     order = serializers.SlugRelatedField(slug_field='code', read_only=True)
@@ -484,7 +511,7 @@ class OrderPositionSerializer(I18nAwareModelSerializer):
         fields = ('id', 'order', 'positionid', 'item', 'variation', 'price', 'attendee_name', 'attendee_name_parts',
                   'company', 'street', 'zipcode', 'city', 'country', 'state', 'discount',
                   'attendee_email', 'voucher', 'tax_rate', 'tax_value', 'secret', 'addon_to', 'subevent', 'checkins',
-                  'downloads', 'answers', 'tax_rule', 'pseudonymization_id', 'pdf_data', 'seat', 'canceled',
+                  'print_logs', 'downloads', 'answers', 'tax_rule', 'pseudonymization_id', 'pdf_data', 'seat', 'canceled',
                   'valid_from', 'valid_until', 'blocked', 'voucher_budget_use')
         read_only_fields = (
             'id', 'order', 'positionid', 'item', 'variation', 'price', 'voucher', 'tax_rate', 'tax_value', 'secret',
@@ -571,9 +598,9 @@ class CheckinListOrderPositionSerializer(OrderPositionSerializer):
         fields = ('id', 'order', 'positionid', 'item', 'variation', 'price', 'attendee_name', 'attendee_name_parts',
                   'company', 'street', 'zipcode', 'city', 'country', 'state',
                   'attendee_email', 'voucher', 'tax_rate', 'tax_value', 'secret', 'addon_to', 'subevent', 'checkins',
-                  'downloads', 'answers', 'tax_rule', 'pseudonymization_id', 'pdf_data', 'seat', 'require_attention',
-                  'order__status', 'order__valid_if_pending', 'order__require_approval', 'valid_from', 'valid_until',
-                  'blocked')
+                  'print_logs', 'downloads', 'answers', 'tax_rule', 'pseudonymization_id', 'pdf_data', 'seat',
+                  'require_attention', 'order__status', 'order__valid_if_pending', 'order__require_approval',
+                  'valid_from', 'valid_until', 'blocked')
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
@@ -726,12 +753,12 @@ class OrderSerializer(I18nAwareModelSerializer):
             'code', 'event', 'status', 'testmode', 'secret', 'email', 'phone', 'locale', 'datetime', 'expires', 'payment_date',
             'payment_provider', 'fees', 'total', 'comment', 'custom_followup_at', 'invoice_address', 'positions', 'downloads',
             'checkin_attention', 'checkin_text', 'last_modified', 'payments', 'refunds', 'require_approval', 'sales_channel',
-            'url', 'customer', 'valid_if_pending', 'api_meta'
+            'url', 'customer', 'valid_if_pending', 'api_meta', 'cancellation_date'
         )
         read_only_fields = (
             'code', 'status', 'testmode', 'secret', 'datetime', 'expires', 'payment_date',
             'payment_provider', 'fees', 'total', 'positions', 'downloads', 'customer',
-            'last_modified', 'payments', 'refunds', 'require_approval', 'sales_channel'
+            'last_modified', 'payments', 'refunds', 'require_approval', 'sales_channel', 'cancellation_date'
         )
 
     def __init__(self, *args, **kwargs):
@@ -1488,6 +1515,7 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
                 pos.answers = answers
                 pos.pseudonymization_id = "PREVIEW"
                 pos.checkins = []
+                pos.print_logs = []
                 pos_map[pos.positionid] = pos
             else:
                 if pos.voucher:

src/pretix/api/serializers/organizer.py

@@ -29,6 +29,7 @@ from django.utils.translation import gettext_lazy as _
 from rest_framework import serializers
 from rest_framework.exceptions import ValidationError
 
+from pretix.api.auth.devicesecurity import get_all_security_profiles
 from pretix.api.serializers import AsymmetricField
 from pretix.api.serializers.i18n import I18nAwareModelSerializer
 from pretix.api.serializers.order import CompatibleJSONField
@@ -297,6 +298,7 @@ class DeviceSerializer(serializers.ModelSerializer):
     revoked = serializers.BooleanField(read_only=True)
     initialized = serializers.DateTimeField(read_only=True)
     initialization_token = serializers.DateTimeField(read_only=True)
+    security_profile = serializers.ChoiceField(choices=[], required=False, default="full")
 
     class Meta:
         model = Device
@@ -306,6 +308,10 @@ class DeviceSerializer(serializers.ModelSerializer):
             'os_name', 'os_version', 'software_brand', 'software_version', 'security_profile'
         )
 
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.fields['security_profile'].choices = [(k, v.verbose_name) for k, v in get_all_security_profiles().items()]
+
 
 class TeamInviteSerializer(serializers.ModelSerializer):
     class Meta:

src/pretix/api/signals.py

@@ -32,10 +32,17 @@ from pretix.helpers.periodic import minimum_interval
 register_webhook_events = Signal()
 """
 This signal is sent out to get all known webhook events. Receivers should return an
-instance of a subclass of pretix.api.webhooks.WebhookEvent or a list of such
+instance of a subclass of ``pretix.api.webhooks.WebhookEvent`` or a list of such
 instances.
 """
 
+register_device_security_profile = Signal()
+"""
+This signal is sent out to get all known device security_profiles. Receivers should
+return an instance of a subclass of ``pretix.api.auth.devicesecurity.BaseSecurityProfile``
+or a list of such instances.
+"""
+
 
 @receiver(periodic_task)
 @scopes_disabled()

src/pretix/api/views/checkin.py

@@ -62,6 +62,7 @@ from pretix.base.models import (
     CachedFile, Checkin, CheckinList, Device, Event, Order, OrderPosition,
     Question, ReusableMedium, RevokedTicketSecret, TeamAPIToken,
 )
+from pretix.base.models.orders import PrintLog
 from pretix.base.services.checkin import (
     CheckInError, RequiredQuestionsError, SQLLogic, perform_checkin,
 )
@@ -115,7 +116,7 @@ class CheckinListViewSet(viewsets.ModelViewSet):
         if 'subevent' in self.request.query_params.getlist('expand'):
             qs = qs.prefetch_related(
                 'subevent', 'subevent__event', 'subevent__subeventitem_set', 'subevent__subeventitemvariation_set',
-                'subevent__seat_category_mappings', 'subevent__meta_values', 'auto_checkin_sales_channels'
+                'subevent__seat_category_mappings', 'subevent__meta_values',
             )
         return qs
 
@@ -142,7 +143,9 @@ class CheckinListViewSet(viewsets.ModelViewSet):
             data=self.request.data
         )
 
+    @transaction.atomic
     def perform_destroy(self, instance):
+        instance.checkins.all().delete()
         instance.log_action(
             'pretix.event.checkinlist.deleted',
             user=self.request.user,
@@ -365,8 +368,9 @@ def _checkin_list_position_queryset(checkinlists, ignore_status=False, ignore_pr
         qs = qs.prefetch_related(
             Prefetch(
                 lookup='checkins',
-                queryset=Checkin.objects.filter(list_id__in=[cl.pk for cl in checkinlists])
+                queryset=Checkin.objects.filter(list_id__in=[cl.pk for cl in checkinlists]).select_related('device')
             ),
+            Prefetch('print_logs', queryset=PrintLog.objects.select_related('device')),
             'answers', 'answers__options', 'answers__question',
             Prefetch('addons', OrderPosition.objects.select_related('item', 'variation')),
             Prefetch('order', Order.objects.select_related('invoice_address').prefetch_related(
@@ -377,7 +381,8 @@ def _checkin_list_position_queryset(checkinlists, ignore_status=False, ignore_pr
                 Prefetch(
                     'positions',
                     OrderPosition.objects.prefetch_related(
-                        Prefetch('checkins', queryset=Checkin.objects.all()),
+                        Prefetch('checkins', queryset=Checkin.objects.select_related('device')),
+                        Prefetch('print_logs', queryset=PrintLog.objects.select_related('device')),
                         'item', 'variation', 'answers', 'answers__options', 'answers__question',
                     )
                 )
@@ -389,8 +394,9 @@ def _checkin_list_position_queryset(checkinlists, ignore_status=False, ignore_pr
         qs = qs.prefetch_related(
             Prefetch(
                 lookup='checkins',
-                queryset=Checkin.objects.filter(list_id__in=[cl.pk for cl in checkinlists])
+                queryset=Checkin.objects.filter(list_id__in=[cl.pk for cl in checkinlists]).select_related('device')
             ),
+            Prefetch('print_logs', queryset=PrintLog.objects.select_related('device')),
             'answers', 'answers__options', 'answers__question',
             Prefetch('addons', OrderPosition.objects.select_related('item', 'variation'))
         ).select_related('item', 'variation', 'order', 'addon_to', 'order__invoice_address', 'order', 'seat')

src/pretix/api/views/device.py

@@ -20,6 +20,7 @@
 # <https://www.gnu.org/licenses/>.
 #
 import base64
+import copy
 import logging
 
 from cryptography.hazmat.backends.openssl.backend import Backend
@@ -146,6 +147,8 @@ class InitializeView(APIView):
     permission_classes = ()
 
     def post(self, request, format=None):
+        from pretix.base.signals import device_info_updated
+
         serializer = InitializationRequestSerializer(data=request.data)
         serializer.is_valid(raise_exception=True)
 
@@ -160,6 +163,8 @@ class InitializeView(APIView):
         if device.revoked:
             raise ValidationError({'token': ['This initialization token has been revoked.']})
 
+        old_instance = copy.copy(device)
+
         device.initialized = now()
         device.hardware_brand = serializer.validated_data.get('hardware_brand')
         device.hardware_model = serializer.validated_data.get('hardware_model')
@@ -174,6 +179,10 @@ class InitializeView(APIView):
 
         device.log_action('pretix.device.initialized', data=serializer.validated_data, auth=device)
 
+        device_info_updated.send(
+            sender=Device, old_device=old_instance, new_device=device
+        )
+
         serializer = DeviceSerializer(device)
         return Response(serializer.data)
 
@@ -182,9 +191,12 @@ class UpdateView(APIView):
     authentication_classes = (DeviceTokenAuthentication,)
 
     def post(self, request, format=None):
+        from pretix.base.signals import device_info_updated
+
         serializer = UpdateRequestSerializer(data=request.data)
         serializer.is_valid(raise_exception=True)
         device = request.auth
+        old_instance = copy.copy(device)
         device.hardware_brand = serializer.validated_data.get('hardware_brand')
         device.hardware_model = serializer.validated_data.get('hardware_model')
         device.os_name = serializer.validated_data.get('os_name')
@@ -200,6 +212,10 @@ class UpdateView(APIView):
         device.save()
         device.log_action('pretix.device.updated', data=serializer.validated_data, auth=device)
 
+        device_info_updated.send(
+            sender=Device, old_device=old_instance, new_device=device
+        )
+
         serializer = DeviceSerializer(device)
         return Response(serializer.data)
 

src/pretix/api/views/event.py

@@ -40,6 +40,7 @@ from django.utils.timezone import now
 from django_filters.rest_framework import DjangoFilterBackend, FilterSet
 from django_scopes import scopes_disabled
 from rest_framework import serializers, views, viewsets
+from rest_framework.decorators import action
 from rest_framework.exceptions import (
     NotFound, PermissionDenied, ValidationError,
 )
@@ -50,8 +51,9 @@ from pretix.api.auth.permission import EventCRUDPermission
 from pretix.api.pagination import TotalOrderingFilter
 from pretix.api.serializers.event import (
     CloneEventSerializer, DeviceEventSettingsSerializer, EventSerializer,
-    EventSettingsSerializer, ItemMetaPropertiesSerializer, SeatSerializer,
-    SubEventSerializer, TaxRuleSerializer,
+    EventSettingsSerializer, ItemMetaPropertiesSerializer,
+    SeatBulkBlockInputSerializer, SeatSerializer, SubEventSerializer,
+    TaxRuleSerializer,
 )
 from pretix.api.views import ConditionalListView
 from pretix.base.models import (
@@ -237,9 +239,9 @@ class EventViewSet(viewsets.ModelViewSet):
             disabled = {m: 'disabled' for m in current_plugins_value if m not in updated_plugins_value}
             changed = merge_dicts(enabled, disabled)
 
-            for module, action in changed.items():
+            for module, operation in changed.items():
                 serializer.instance.log_action(
-                    'pretix.event.plugins.' + action,
+                    'pretix.event.plugins.' + operation,
                     user=self.request.user,
                     auth=self.request.auth,
                     data={'plugin': module}
@@ -297,7 +299,8 @@ class EventViewSet(viewsets.ModelViewSet):
 
             if 'all_sales_channels' in serializer.validated_data and 'sales_channels' in serializer.validated_data:
                 new_event.all_sales_channels = serializer.validated_data['all_sales_channels']
-                new_event.limit_sales_channels.set(serializer.validated_data['limit_sales_channels'])
+                if not new_event.all_sales_channels:
+                    new_event.limit_sales_channels.set(serializer.validated_data['limit_sales_channels'])
         else:
             serializer.instance.set_defaults()
 
@@ -370,7 +373,7 @@ with scopes_disabled():
 
         class Meta:
             model = SubEvent
-            fields = ['active', 'event__live']
+            fields = ['is_public', 'active', 'event__live']
 
         def ends_after_qs(self, queryset, name, value):
             expr = Q(
@@ -743,3 +746,24 @@ class SeatViewSet(ConditionalListView, viewsets.ModelViewSet):
             auth=self.request.auth,
             data={"seats": [serializer.instance.pk]},
         )
+
+    def bulk_change_blocked(self, blocked):
+        s = SeatBulkBlockInputSerializer(
+            data=self.request.data,
+            context={"event": self.request.event, "queryset": self.get_queryset()},
+        )
+        s.is_valid(raise_exception=True)
+
+        seats = s.validated_data["seats"]
+        for seat in seats:
+            seat.blocked = blocked
+        Seat.objects.bulk_update(seats, ["blocked"], batch_size=1000)
+        return Response({})
+
+    @action(methods=["POST"], detail=False)
+    def bulk_block(self, request, *args, **kwargs):
+        return self.bulk_change_blocked(True)
+
+    @action(methods=["POST"], detail=False)
+    def bulk_unblock(self, request, *args, **kwargs):
+        return self.bulk_change_blocked(False)

src/pretix/api/views/media.py

@@ -42,6 +42,7 @@ from pretix.base.models import (
     Checkin, GiftCard, GiftCardAcceptance, GiftCardTransaction, OrderPosition,
     ReusableMedium,
 )
+from pretix.base.models.orders import PrintLog
 from pretix.helpers import OF_SELF
 from pretix.helpers.dicts import merge_dicts
 
@@ -78,7 +79,8 @@ class ReusableMediaViewSet(viewsets.ModelViewSet):
                 queryset=OrderPosition.objects.select_related(
                     'order', 'order__event', 'order__event__organizer', 'seat',
                 ).prefetch_related(
-                    Prefetch('checkins', queryset=Checkin.objects.all()),
+                    Prefetch('checkins', queryset=Checkin.objects.select_related('device')),
+                    Prefetch('print_logs', queryset=PrintLog.objects.select_related('device')),
                     'answers', 'answers__options', 'answers__question',
                 )
             ),

src/pretix/api/views/order.py

@@ -57,7 +57,8 @@ from pretix.api.serializers.order import (
     OrderPaymentCreateSerializer, OrderPaymentSerializer,
     OrderPositionSerializer, OrderRefundCreateSerializer,
     OrderRefundSerializer, OrderSerializer, PriceCalcSerializer,
-    RevokedTicketSecretSerializer, SimulatedOrderSerializer,
+    PrintLogSerializer, RevokedTicketSecretSerializer,
+    SimulatedOrderSerializer,
 )
 from pretix.api.serializers.orderchange import (
     BlockNameSerializer, OrderChangeOperationSerializer,
@@ -75,7 +76,7 @@ from pretix.base.models import (
     TeamAPIToken, generate_secret,
 )
 from pretix.base.models.orders import (
-    BlockedTicketSecret, QuestionAnswer, RevokedTicketSecret,
+    BlockedTicketSecret, PrintLog, QuestionAnswer, RevokedTicketSecret,
 )
 from pretix.base.payment import PaymentException
 from pretix.base.pdf import get_images
@@ -214,7 +215,7 @@ class OrderViewSetMixin:
     queryset = Order.objects.none()
     filter_backends = (DjangoFilterBackend, TotalOrderingFilter)
     ordering = ('datetime',)
-    ordering_fields = ('datetime', 'code', 'status', 'last_modified')
+    ordering_fields = ('datetime', 'code', 'status', 'last_modified', 'cancellation_date')
     filterset_class = OrderFilter
     lookup_field = 'code'
 
@@ -258,7 +259,8 @@ class OrderViewSetMixin:
             return Prefetch(
                 'positions',
                 opq.all().prefetch_related(
-                    Prefetch('checkins', queryset=Checkin.objects.all()),
+                    Prefetch('checkins', queryset=Checkin.objects.select_related('device')),
+                    Prefetch('print_logs', queryset=PrintLog.objects.select_related('device')),
                     Prefetch('item', queryset=self.request.event.items.prefetch_related(
                         Prefetch('meta_values', ItemMetaValue.objects.select_related('property'), to_attr='meta_values_cached')
                     )),
@@ -279,7 +281,8 @@ class OrderViewSetMixin:
             return Prefetch(
                 'positions',
                 opq.all().prefetch_related(
-                    Prefetch('checkins', queryset=Checkin.objects.all()),
+                    Prefetch('checkins', queryset=Checkin.objects.select_related('device')),
+                    Prefetch('print_logs', queryset=PrintLog.objects.select_related('device')),
                     'item', 'variation',
                     Prefetch('answers', queryset=QuestionAnswer.objects.prefetch_related('options', 'question').order_by('question__position')),
                     'seat',
@@ -1092,7 +1095,8 @@ class OrderPositionViewSet(viewsets.ModelViewSet):
                 'item_meta_properties',
             )
             qs = qs.prefetch_related(
-                Prefetch('checkins', queryset=Checkin.objects.all()),
+                Prefetch('checkins', queryset=Checkin.objects.select_related("device")),
+                Prefetch('print_logs', queryset=PrintLog.objects.select_related('device')),
                 Prefetch('item', queryset=self.request.event.items.prefetch_related(
                     Prefetch('meta_values', ItemMetaValue.objects.select_related('property'),
                              to_attr='meta_values_cached')
@@ -1111,7 +1115,7 @@ class OrderPositionViewSet(viewsets.ModelViewSet):
                     Prefetch(
                         'positions',
                         qs.prefetch_related(
-                            Prefetch('checkins', queryset=Checkin.objects.all()),
+                            Prefetch('checkins', queryset=Checkin.objects.select_related('device')),
                             Prefetch('item', queryset=self.request.event.items.prefetch_related(
                                 Prefetch('meta_values', ItemMetaValue.objects.select_related('property'),
                                          to_attr='meta_values_cached')
@@ -1135,7 +1139,8 @@ class OrderPositionViewSet(viewsets.ModelViewSet):
             )
         else:
             qs = qs.prefetch_related(
-                Prefetch('checkins', queryset=Checkin.objects.all()),
+                Prefetch('checkins', queryset=Checkin.objects.select_related("device")),
+                Prefetch('print_logs', queryset=PrintLog.objects.select_related('device')),
                 'answers', 'answers__options', 'answers__question',
             ).select_related(
                 'item', 'order', 'order__event', 'order__event__organizer', 'seat'
@@ -1254,6 +1259,34 @@ class OrderPositionViewSet(viewsets.ModelViewSet):
         )
         return resp
 
+    @action(detail=True, url_name="printlog", url_path="printlog", methods=["POST"])
+    def printlog(self, request, **kwargs):
+        pos = self.get_object()
+        serializer = PrintLogSerializer(data=request.data)
+        serializer.is_valid(raise_exception=True)
+
+        with transaction.atomic():
+            serializer.save(
+                position=pos,
+                device=request.auth if isinstance(request.auth, Device) else None,
+                user=request.user if request.user.is_authenticated 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,
+            )
+
+            pos.order.log_action(
+                "pretix.event.order.print",
+                data={
+                    "position": pos.pk,
+                    "positionid": pos.positionid,
+                    **serializer.validated_data,
+                },
+                auth=request.auth,
+                user=request.user,
+            )
+
+        return Response(serializer.data, status=status.HTTP_201_CREATED)
+
     @action(detail=True, url_name='pdf_image', url_path=r'pdf_image/(?P<key>[^/]+)')
     def pdf_image(self, request, key, **kwargs):
         pos = self.get_object()

src/pretix/base/auth.py

@@ -32,13 +32,16 @@
 # distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations under the License.
 
+import string
 from collections import OrderedDict
 from importlib import import_module
 
 from django import forms
 from django.conf import settings
 from django.contrib.auth import authenticate
-from django.utils.translation import gettext_lazy as _
+from django.contrib.auth.hashers import check_password, make_password
+from django.core.exceptions import ValidationError
+from django.utils.translation import gettext_lazy as _, ngettext
 
 
 def get_auth_backends():
@@ -149,7 +152,7 @@ class NativeAuthBackend(BaseAuthBackend):
         to log in.
         """
         d = OrderedDict([
-            ('email', forms.EmailField(label=_("E-mail"), max_length=254,
+            ('email', forms.EmailField(label=_("Email"), max_length=254,
                                        widget=forms.EmailInput(attrs={'autofocus': 'autofocus'}))),
             ('password', forms.CharField(label=_("Password"), widget=forms.PasswordInput,
                                          max_length=4096)),
@@ -160,3 +163,62 @@ class NativeAuthBackend(BaseAuthBackend):
         u = authenticate(request=request, email=form_data['email'].lower(), password=form_data['password'])
         if u and u.auth_backend == self.identifier:
             return u
+
+
+class NumericAndAlphabeticPasswordValidator:
+
+    def validate(self, password, user=None):
+        has_numeric = any(c in string.digits for c in password)
+        has_alpha = any(c in string.ascii_letters for c in password)
+        if not has_numeric or not has_alpha:
+            raise ValidationError(
+                _(
+                    "Your password must contain both numeric and alphabetic characters.",
+                ),
+                code="password_numeric_and_alphabetic",
+            )
+
+    def get_help_text(self):
+        return _(
+            "Your password must contain both numeric and alphabetic characters.",
+        )
+
+
+class HistoryPasswordValidator:
+
+    def __init__(self, history_length=4):
+        self.history_length = history_length
+
+    def validate(self, password, user=None):
+        from pretix.base.models import User
+
+        if not user or not user.pk or not isinstance(user, User):
+            return
+
+        for hp in user.historic_passwords.order_by("-created")[:self.history_length]:
+            if check_password(password, hp.password):
+                raise ValidationError(
+                    ngettext(
+                        "Your password may not be the same as your previous password.",
+                        "Your password may not be the same as one of your %(history_length)s previous passwords.",
+                        self.history_length,
+                    ),
+                    code="password_history",
+                    params={"history_length": self.history_length},
+                )
+
+    def get_help_text(self):
+        return ngettext(
+            "Your password may not be the same as your previous password.",
+            "Your password may not be the same as one of your %(history_length)s previous passwords.",
+            self.history_length,
+        ) % {"history_length": self.history_length}
+
+    def password_changed(self, password, user=None):
+        if not user:
+            pass
+
+        user.historic_passwords.create(password=make_password(password))
+        user.historic_passwords.filter(
+            pk__in=user.historic_passwords.order_by("-created")[self.history_length:].values_list("pk", flat=True),
+        ).delete()

src/pretix/base/customersso/oidc.py

@@ -46,6 +46,8 @@ This module contains utilities for implementing OpenID Connect for customer auth
 as well as an OpenID Provider (OP).
 """
 
+pretix_token_endpoint_auth_methods = ['client_secret_basic', 'client_secret_post']
+
 
 def _urljoin(base, path):
     if not base.endswith("/"):
@@ -127,6 +129,16 @@ def oidc_validate_and_complete_config(config):
                         fields=", ".join(provider_config.get("claims_supported", []))
                     ))
 
+    if "token_endpoint_auth_methods_supported" in provider_config:
+        token_endpoint_auth_methods_supported = provider_config.get("token_endpoint_auth_methods_supported",
+                                                                    ["client_secret_basic"])
+        if not any(x in pretix_token_endpoint_auth_methods for x in token_endpoint_auth_methods_supported):
+            raise ValidationError(
+                _(f'No supported Token Endpoint Auth Methods supported: {token_endpoint_auth_methods_supported}').format(
+                    token_endpoint_auth_methods_supported=", ".join(token_endpoint_auth_methods_supported)
+                )
+            )
+
     config['provider_config'] = provider_config
     return config
 
@@ -147,6 +159,18 @@ def oidc_authorize_url(provider, state, redirect_uri):
 
 def oidc_validate_authorization(provider, code, redirect_uri):
     endpoint = provider.configuration['provider_config']['token_endpoint']
+
+    # Wall of shame and RFC ignorant IDPs
+    if endpoint == 'https://www.linkedin.com/oauth/v2/accessToken':
+        token_endpoint_auth_method = 'client_secret_post'
+    else:
+        token_endpoint_auth_methods = provider.configuration['provider_config'].get(
+            'token_endpoint_auth_methods_supported', ['client_secret_basic']
+        )
+        token_endpoint_auth_method = [
+            x for x in pretix_token_endpoint_auth_methods if x in token_endpoint_auth_methods
+        ][0]
+
     params = {
         # https://datatracker.ietf.org/doc/html/rfc6749#section-4.1.3
         # https://openid.net/specs/openid-connect-core-1_0.html#TokenEndpoint
@@ -154,6 +178,11 @@ def oidc_validate_authorization(provider, code, redirect_uri):
         'code': code,
         'redirect_uri': redirect_uri,
     }
+
+    if token_endpoint_auth_method == 'client_secret_post':
+        params['client_id'] = provider.configuration['client_id']
+        params['client_secret'] = provider.configuration['client_secret']
+
     try:
         resp = requests.post(
             endpoint,
@@ -161,7 +190,10 @@ def oidc_validate_authorization(provider, code, redirect_uri):
             headers={
                 'Accept': 'application/json',
             },
-            auth=(provider.configuration['client_id'], provider.configuration['client_secret']),
+            auth=(
+                provider.configuration['client_id'],
+                provider.configuration['client_secret']
+            ) if token_endpoint_auth_method == 'client_secret_basic' else None,
         )
         resp.raise_for_status()
         data = resp.json()

src/pretix/base/email.py

@@ -35,6 +35,7 @@ from django.utils.translation import get_language, gettext_lazy as _
 from pretix.base.models import Event
 from pretix.base.signals import register_html_mail_renderers
 from pretix.base.templatetags.rich_text import markdown_compile_email
+from pretix.helpers.format import SafeFormatter, format_map
 
 from pretix.base.services.placeholders import (  # noqa
     get_available_placeholders, PlaceholderContext
@@ -68,7 +69,7 @@ def test_custom_smtp_backend(backend: T, from_addr: str) -> None:
 
 class BaseHTMLMailRenderer:
     """
-    This is the base class for all HTML e-mail renderers.
+    This is the base class for all HTML email renderers.
     """
 
     def __init__(self, event: Event, organizer=None):
@@ -79,7 +80,7 @@ class BaseHTMLMailRenderer:
         return self.identifier
 
     def render(self, plain_body: str, plain_signature: str, subject: str, order=None,
-               position=None) -> str:
+               position=None, context=None) -> str:
         """
         This method should generate the HTML part of the email.
 
@@ -88,6 +89,7 @@ class BaseHTMLMailRenderer:
         :param subject: The email subject.
         :param order: The order if this email is connected to one, otherwise ``None``.
         :param position: The order position if this email is connected to one, otherwise ``None``.
+        :param context: Context to use to render placeholders in the plain body
         :return: An HTML string
         """
         raise NotImplementedError()
@@ -134,8 +136,10 @@ class TemplateBasedMailRenderer(BaseHTMLMailRenderer):
     def compile_markdown(self, plaintext):
         return markdown_compile_email(plaintext)
 
-    def render(self, plain_body: str, plain_signature: str, subject: str, order, position) -> str:
+    def render(self, plain_body: str, plain_signature: str, subject: str, order, position, context) -> str:
         body_md = self.compile_markdown(plain_body)
+        if context:
+            body_md = format_map(body_md, context=context, mode=SafeFormatter.MODE_RICH_TO_HTML)
         htmlctx = {
             'site': settings.PRETIX_INSTANCE_NAME,
             'site_url': settings.SITE_URL,

src/pretix/base/exporters/customers.py

@@ -64,7 +64,7 @@ class CustomerListExporter(OrganizerLevelExportMixin, ListExporter):
             _('Customer ID'),
             _('SSO provider'),
             _('External identifier'),
-            _('E-mail'),
+            _('Email'),
             _('Phone number'),
             _('Full name'),
         ]

src/pretix/base/exporters/invoices.py

@@ -199,7 +199,7 @@ class InvoiceDataExporter(InvoiceExporterMixin, MultiSheetListExporter):
                 _('Invoice number'),
                 _('Date'),
                 _('Order code'),
-                _('E-mail address'),
+                _('Email address'),
                 _('Invoice type'),
                 _('Cancellation of'),
                 _('Language'),
@@ -326,7 +326,7 @@ class InvoiceDataExporter(InvoiceExporterMixin, MultiSheetListExporter):
                 _('Event start date'),
                 _('Date'),
                 _('Order code'),
-                _('E-mail address'),
+                _('Email address'),
                 _('Invoice type'),
                 _('Cancellation of'),
                 _('Invoice sender:') + ' ' + _('Name'),

src/pretix/base/exporters/orderlist.py

@@ -284,7 +284,7 @@ class OrderListExporter(MultiSheetListExporter):
         headers.append(_('Comment'))
         headers.append(_('Follow-up date'))
         headers.append(_('Positions'))
-        headers.append(_('E-mail address verified'))
+        headers.append(_('Email address verified'))
         headers.append(_('External customer ID'))
         headers.append(_('Payment providers'))
         if form_data.get('include_payment_amounts'):
@@ -655,7 +655,7 @@ class OrderListExporter(MultiSheetListExporter):
         headers += [
             _('Sales channel'),
             _('Order locale'),
-            _('E-mail address verified'),
+            _('Email address verified'),
             _('External customer ID'),
             _('Check-in lists'),
             _('Payment providers'),

src/pretix/base/forms/auth.py

@@ -254,7 +254,7 @@ class PasswordRecoverForm(forms.Form):
 
 class PasswordForgotForm(forms.Form):
     email = forms.EmailField(
-        label=_('E-mail'),
+        label=_('Email'),
     )
 
     def __init__(self, *args, **kwargs):

src/pretix/base/forms/questions.py

@@ -54,6 +54,7 @@ from django.core.validators import (
 from django.db.models import QuerySet
 from django.forms import Select, widgets
 from django.forms.widgets import FILE_INPUT_CONTRADICTION
+from django.urls import reverse
 from django.utils.formats import date_format
 from django.utils.html import escape
 from django.utils.safestring import mark_safe
@@ -77,7 +78,7 @@ from pretix.base.i18n import (
     get_babel_locale, get_language_without_region, language,
 )
 from pretix.base.models import InvoiceAddress, Item, Question, QuestionOption
-from pretix.base.models.tax import VAT_ID_COUNTRIES, ask_for_vat_id
+from pretix.base.models.tax import ask_for_vat_id
 from pretix.base.services.tax import (
     VATIDFinalError, VATIDTemporaryError, validate_vat_id,
 )
@@ -602,6 +603,7 @@ class BaseQuestionsForm(forms.Form):
         questions = pos.item.questions_to_ask
         event = kwargs.pop('event')
         self.all_optional = kwargs.pop('all_optional', False)
+        self.attendee_addresses_required = event.settings.attendee_addresses_required and not self.all_optional
 
         super().__init__(*args, **kwargs)
 
@@ -676,7 +678,7 @@ class BaseQuestionsForm(forms.Form):
 
         if item.ask_attendee_data and event.settings.attendee_addresses_asked:
             add_fields['street'] = forms.CharField(
-                required=event.settings.attendee_addresses_required and not self.all_optional,
+                required=self.attendee_addresses_required,
                 label=_('Address'),
                 widget=forms.Textarea(attrs={
                     'rows': 2,
@@ -686,7 +688,7 @@ class BaseQuestionsForm(forms.Form):
                 initial=(cartpos.street if cartpos else orderpos.street),
             )
             add_fields['zipcode'] = forms.CharField(
-                required=event.settings.attendee_addresses_required and not self.all_optional,
+                required=False,
                 max_length=30,
                 label=_('ZIP code'),
                 initial=(cartpos.zipcode if cartpos else orderpos.zipcode),
@@ -695,7 +697,7 @@ class BaseQuestionsForm(forms.Form):
                 }),
             )
             add_fields['city'] = forms.CharField(
-                required=event.settings.attendee_addresses_required and not self.all_optional,
+                required=False,
                 label=_('City'),
                 max_length=255,
                 initial=(cartpos.city if cartpos else orderpos.city),
@@ -707,11 +709,12 @@ class BaseQuestionsForm(forms.Form):
             add_fields['country'] = CountryField(
                 countries=CachedCountries
             ).formfield(
-                required=event.settings.attendee_addresses_required and not self.all_optional,
+                required=self.attendee_addresses_required,
                 label=_('Country'),
                 initial=country,
                 widget=forms.Select(attrs={
                     'autocomplete': 'country',
+                    'data-country-information-url': reverse('js_helpers.states'),
                 }),
             )
             c = [('', pgettext_lazy('address', 'Select state'))]
@@ -946,9 +949,9 @@ class BaseQuestionsForm(forms.Form):
         d = super().clean()
 
         if self.address_validation:
-            self.cleaned_data = d = validate_address(d, True)
+            self.cleaned_data = d = validate_address(d, all_optional=not self.attendee_addresses_required)
 
-        if d.get('city') and d.get('country') and str(d['country']) in COUNTRIES_WITH_STATE_IN_ADDRESS:
+        if d.get('street') and d.get('country') and str(d['country']) in COUNTRIES_WITH_STATE_IN_ADDRESS:
             if not d.get('state'):
                 self.add_error('state', _('This field is required.'))
 
@@ -1005,7 +1008,7 @@ class BaseInvoiceAddressForm(forms.ModelForm):
             'street': forms.Textarea(attrs={
                 'rows': 2,
                 'placeholder': _('Street and Number'),
-                'autocomplete': 'street-address'
+                'autocomplete': 'street-address',
             }),
             'beneficiary': forms.Textarea(attrs={'rows': 3}),
             'country': forms.Select(attrs={
@@ -1021,7 +1024,7 @@ class BaseInvoiceAddressForm(forms.ModelForm):
                 'data-display-dependency': '#id_is_business_1',
                 'autocomplete': 'organization',
             }),
-            'vat_id': forms.TextInput(attrs={'data-display-dependency': '#id_is_business_1', 'data-countries-with-vat-id': ','.join(VAT_ID_COUNTRIES)}),
+            'vat_id': forms.TextInput(attrs={'data-display-dependency': '#id_is_business_1'}),
             'internal_reference': forms.TextInput,
         }
         labels = {
@@ -1055,6 +1058,7 @@ class BaseInvoiceAddressForm(forms.ModelForm):
             ])
 
         self.fields['country'].choices = CachedCountries()
+        self.fields['country'].widget.attrs['data-country-information-url'] = reverse('js_helpers.states')
 
         c = [('', pgettext_lazy('address', 'Select state'))]
         fprefix = self.prefix + '-' if self.prefix else ''
@@ -1083,6 +1087,10 @@ class BaseInvoiceAddressForm(forms.ModelForm):
         )
         self.fields['state'].widget.is_required = True
 
+        self.fields['street'].required = False
+        self.fields['zipcode'].required = False
+        self.fields['city'].required = False
+
         # Without JavaScript the VAT ID field is not hidden, so we empty the field if a country outside the EU is selected.
         if cc and not ask_for_vat_id(cc) and fprefix + 'vat_id' in self.data:
             self.data = self.data.copy()
@@ -1122,6 +1130,7 @@ class BaseInvoiceAddressForm(forms.ModelForm):
 
         if event.settings.invoice_address_custom_field:
             self.fields['custom_field'].label = event.settings.invoice_address_custom_field
+            self.fields['custom_field'].help_text = event.settings.invoice_address_custom_field_helptext
         else:
             del self.fields['custom_field']
 
@@ -1134,6 +1143,7 @@ class BaseInvoiceAddressForm(forms.ModelForm):
             validate_address  # local import to prevent impact on startup time
 
         data = self.cleaned_data
+
         if not data.get('is_business'):
             data['company'] = ''
             data['vat_id'] = ''
@@ -1141,9 +1151,11 @@ class BaseInvoiceAddressForm(forms.ModelForm):
             data['vat_id'] = ''
         if self.event.settings.invoice_address_required:
             if data.get('is_business') and not data.get('company'):
-                raise ValidationError(_('You need to provide a company name.'))
+                raise ValidationError({"company": _('You need to provide a company name.')})
             if not data.get('is_business') and not data.get('name_parts'):
                 raise ValidationError(_('You need to provide your name.'))
+            if not self.all_optional and 'street' in self.fields and not data.get('street') and not data.get('zipcode') and not data.get('city'):
+                raise ValidationError({"street": _('This field is required.')})
 
         if 'vat_id' in self.changed_data or not data.get('vat_id'):
             self.instance.vat_id_validated = False

src/pretix/base/forms/user.py

@@ -48,10 +48,10 @@ from pretix.control.forms import SingleLanguageWidget
 
 class UserSettingsForm(forms.ModelForm):
     error_messages = {
-        'duplicate_identifier': _("There already is an account associated with this e-mail address. "
+        'duplicate_identifier': _("There already is an account associated with this email address. "
                                   "Please choose a different one."),
-        'pw_current': _("Please enter your current password if you want to change your e-mail "
-                        "address or password."),
+        'pw_current': _("Please enter your current password if you want to change your email address "
+                        "or password."),
         'pw_current_wrong': _("The current password you entered was not correct."),
         'pw_mismatch': _("Please enter the same password twice"),
         'rate_limit': _("For security reasons, please wait 5 minutes before you try again."),

src/pretix/base/invoice.py

@@ -289,7 +289,7 @@ class BaseReportlabInvoiceRenderer(BaseInvoiceRenderer):
     def _clean_text(self, text, tags=None):
         return self._normalize(bleach.clean(
             text,
-            tags=tags or []
+            tags=set(tags) if tags else set()
         ).strip().replace('<br>', '<br />').replace('\n', '<br />\n'))
 
 
@@ -461,7 +461,7 @@ class ClassicInvoiceRenderer(BaseReportlabInvoiceRenderer):
     def _draw_event(self, canvas):
         def shorten(txt):
             txt = str(txt)
-            txt = bleach.clean(txt, tags=[]).strip()
+            txt = bleach.clean(txt, tags=set()).strip()
             p = Paragraph(self._normalize(txt.strip().replace('\n', '<br />\n')), style=self.stylesheet['Normal'])
             p_size = p.wrap(self.event_width, self.event_height)
 

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

@@ -36,6 +36,7 @@ import time
 import traceback
 
 from django.conf import settings
+from django.core.cache import cache
 from django.core.management.base import BaseCommand
 from django.dispatch.dispatcher import NO_RECEIVERS
 
@@ -50,17 +51,23 @@ class Command(BaseCommand):
     def add_arguments(self, parser):
         parser.add_argument('--tasks', action='store', type=str, help='Only execute the tasks with this name '
                                                                       '(dotted path, comma separation)')
+        parser.add_argument('--list-tasks', action='store_true', help='Only list all tasks')
         parser.add_argument('--exclude', action='store', type=str, help='Exclude the tasks with this name '
                                                                         '(dotted path, comma separation)')
 
     def handle(self, *args, **options):
         verbosity = int(options['verbosity'])
 
+        cache.set("pretix_runperiodic_executed", True, 3600 * 12)
+
         if not periodic_task.receivers or periodic_task.sender_receivers_cache.get(self) is NO_RECEIVERS:
             return
 
         for receiver in periodic_task._live_receivers(self):
             name = f'{receiver.__module__}.{receiver.__name__}'
+            if options['list_tasks']:
+                print(name)
+                continue
             if options.get('tasks'):
                 if name not in options.get('tasks').split(','):
                     continue
@@ -74,7 +81,7 @@ class Command(BaseCommand):
             try:
                 r = receiver(signal=periodic_task, sender=self)
             except Exception as err:
-                if isinstance(Exception, KeyboardInterrupt):
+                if isinstance(err, KeyboardInterrupt):
                     raise err
                 if settings.SENTRY_ENABLED:
                     from sentry_sdk import capture_exception

src/pretix/base/media.py

@@ -37,6 +37,16 @@ class BaseMediaType:
     def verbose_name(self):
         raise NotImplementedError()
 
+    @property
+    def icon(self):
+        """
+        This can be:
+
+        - The name of a Font Awesome icon to represent this channel type.
+        - The name of a SVG icon file that is resolvable through the static file system. We recommend to design for a size of 18x14 pixels.
+        """
+        return "circle"
+
     def generate_identifier(self, organizer):
         if self.medium_created_by_server:
             raise NotImplementedError()
@@ -59,6 +69,7 @@ class BaseMediaType:
 class BarcodePlainMediaType(BaseMediaType):
     identifier = 'barcode'
     verbose_name = _('Barcode / QR-Code')
+    icon = 'qrcode'
     medium_created_by_server = True
     supports_giftcard = False
     supports_orderposition = True
@@ -75,6 +86,7 @@ class BarcodePlainMediaType(BaseMediaType):
 class NfcUidMediaType(BaseMediaType):
     identifier = 'nfc_uid'
     verbose_name = _('NFC UID-based')
+    icon = 'pretixbase/img/media/nfc_uid.svg'
     medium_created_by_server = False
     supports_giftcard = True
     supports_orderposition = False
@@ -114,6 +126,7 @@ class NfcUidMediaType(BaseMediaType):
 class NfcMf0aesMediaType(BaseMediaType):
     identifier = 'nfc_mf0aes'
     verbose_name = 'NFC Mifare Ultralight AES'
+    icon = 'pretixbase/img/media/nfc_secure.svg'
     medium_created_by_server = False
     supports_giftcard = True
     supports_orderposition = False

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

@@ -29,7 +29,7 @@ class Migration(migrations.Migration):
                 ('password', models.CharField(verbose_name='password', max_length=128)),
                 ('last_login', models.DateTimeField(verbose_name='last login', blank=True, null=True)),
                 ('is_superuser', models.BooleanField(verbose_name='superuser status', default=False, help_text='Designates that this user has all permissions without explicitly assigning them.')),
-                ('email', models.EmailField(max_length=191, blank=True, unique=True, verbose_name='E-mail', null=True,
+                ('email', models.EmailField(max_length=191, blank=True, unique=True, verbose_name='Email', null=True,
                                             db_index=True)),
                 ('givenname', models.CharField(verbose_name='Given name', max_length=255, blank=True, null=True)),
                 ('familyname', models.CharField(verbose_name='Family name', max_length=255, blank=True, null=True)),

src/pretix/base/migrations/0001_squashed_0028_auto_20160816_1242.py

@@ -9,6 +9,7 @@ from decimal import Decimal
 import django.core.validators
 import django.db.models.deletion
 import i18nfield.fields
+from argon2.exceptions import HashingError
 from django.conf import settings
 from django.contrib.auth.hashers import make_password
 from django.db import migrations, models
@@ -25,7 +26,14 @@ def initial_user(apps, schema_editor):
     user = User(email='admin@localhost')
     user.is_staff = True
     user.is_superuser = True
-    user.password = make_password('admin')
+    try:
+        user.password = make_password('admin')
+    except HashingError:
+        raise Exception(
+            "Could not hash password of initial user with argon2id. If this is a system with less than 8 CPU cores, "
+            "you might need to disable argon2id by setting `passwords_argon2=off` in the `[django]` section of the "
+            "pretix.cfg configuration file."
+        )
     user.save()
 
 
@@ -48,7 +56,7 @@ class Migration(migrations.Migration):
                 ('password', models.CharField(max_length=128, verbose_name='password')),
                 ('last_login', models.DateTimeField(blank=True, null=True, verbose_name='last login')),
                 ('is_superuser', models.BooleanField(default=False, help_text='Designates that this user has all permissions without explicitly assigning them.', verbose_name='superuser status')),
-                ('email', models.EmailField(blank=True, db_index=True, max_length=254, null=True, unique=True, verbose_name='E-mail')),
+                ('email', models.EmailField(blank=True, db_index=True, max_length=254, null=True, unique=True, verbose_name='Email')),
                 ('givenname', models.CharField(blank=True, max_length=255, null=True, verbose_name='Given name')),
                 ('familyname', models.CharField(blank=True, max_length=255, null=True, verbose_name='Family name')),
                 ('is_active', models.BooleanField(default=True, verbose_name='Is active')),
@@ -232,7 +240,7 @@ class Migration(migrations.Migration):
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('code', models.CharField(max_length=16, verbose_name='Order code')),
                 ('status', models.CharField(choices=[('n', 'pending'), ('p', 'paid'), ('e', 'expired'), ('c', 'cancelled'), ('r', 'refunded')], max_length=3, verbose_name='Status')),
-                ('email', models.EmailField(blank=True, max_length=254, null=True, verbose_name='E-mail')),
+                ('email', models.EmailField(blank=True, max_length=254, null=True, verbose_name='Email')),
                 ('locale', models.CharField(blank=True, max_length=32, null=True, verbose_name='Locale')),
                 ('secret', models.CharField(default=pretix.base.models.orders.generate_secret, max_length=32)),
                 ('datetime', models.DateTimeField(verbose_name='Date')),

src/pretix/base/migrations/0002_auto_20160209_0940.py

@@ -187,7 +187,7 @@ class Migration(migrations.Migration):
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('code', models.CharField(max_length=16, verbose_name='Order code')),
                 ('status', models.CharField(choices=[('n', 'pending'), ('p', 'paid'), ('e', 'expired'), ('c', 'cancelled'), ('r', 'refunded')], max_length=3, verbose_name='Status')),
-                ('email', models.EmailField(blank=True, max_length=254, null=True, verbose_name='E-mail')),
+                ('email', models.EmailField(blank=True, max_length=254, null=True, verbose_name='Email')),
                 ('locale', models.CharField(blank=True, max_length=32, null=True, verbose_name='Locale')),
                 ('secret', models.CharField(default=pretix.base.models.orders.generate_secret, max_length=32)),
                 ('datetime', models.DateTimeField(verbose_name='Date')),

src/pretix/base/migrations/0051_auto_20170206_2027.py

@@ -20,7 +20,7 @@ class Migration(migrations.Migration):
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('created', models.DateTimeField(auto_now_add=True, verbose_name='On waiting list since')),
-                ('email', models.EmailField(max_length=254, verbose_name='E-mail address')),
+                ('email', models.EmailField(max_length=254, verbose_name='Email address')),
                 ('locale', models.CharField(default='en', max_length=190)),
                 ('event', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='waitinglistentries', to='pretixbase.Event', verbose_name='Event')),
                 ('item', models.ForeignKey(help_text='The product the user waits for.', on_delete=django.db.models.deletion.CASCADE, related_name='waitinglistentries', to='pretixbase.Item', verbose_name='Product')),

src/pretix/base/migrations/0051_auto_20170206_2027_squashed_0057_auto_20170501_2116.py

@@ -35,7 +35,7 @@ class Migration(migrations.Migration):
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('created', models.DateTimeField(auto_now_add=True, verbose_name='On waiting list since')),
-                ('email', models.EmailField(max_length=254, verbose_name='E-mail address')),
+                ('email', models.EmailField(max_length=254, verbose_name='Email address')),
                 ('locale', models.CharField(default='en', max_length=190)),
                 ('event', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='waitinglistentries', to='pretixbase.Event', verbose_name='Event')),
                 ('item', models.ForeignKey(help_text='The product the user waits for.', on_delete=django.db.models.deletion.CASCADE, related_name='waitinglistentries', to='pretixbase.Item', verbose_name='Product')),

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

@@ -163,7 +163,7 @@ class Migration(migrations.Migration):
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('action_type', models.CharField(max_length=255)),
-                ('method', models.CharField(choices=[('mail', 'E-mail')], max_length=255)),
+                ('method', models.CharField(choices=[('mail', 'Email')], max_length=255)),
                 ('event', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE,
                                             to='pretixbase.Event')),
                 ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),

src/pretix/base/migrations/0078_auto_20171206_1603.py

@@ -21,7 +21,7 @@ class Migration(migrations.Migration):
             fields=[
                 ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                 ('action_type', models.CharField(max_length=255)),
-                ('method', models.CharField(choices=[('mail', 'E-mail')], max_length=255)),
+                ('method', models.CharField(choices=[('mail', 'Email')], max_length=255)),
                 ('event', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, to='pretixbase.Event')),
                 ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
                 ('enabled', models.BooleanField(default=True)),

src/pretix/base/migrations/0270_historicpassword.py

@@ -0,0 +1,36 @@
+# Generated by Django 4.2.15 on 2024-09-16 15:10
+
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretixbase", "0269_order_api_meta"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="HistoricPassword",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True, primary_key=True, serialize=False
+                    ),
+                ),
+                ("created", models.DateTimeField(auto_now_add=True)),
+                ("password", models.CharField(max_length=128)),
+                (
+                    "user",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="historic_passwords",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+        ),
+    ]

src/pretix/base/migrations/0271_itemcategory_cross_selling.py

@@ -0,0 +1,32 @@
+# Generated by Django 4.2.11 on 2024-05-27 13:19
+
+from django.db import migrations, models
+
+import pretix.base.models.orders
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretixbase", "0270_historicpassword"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="itemcategory",
+            name="cross_selling_condition",
+            field=models.CharField(null=True, max_length=10),
+        ),
+        migrations.AddField(
+            model_name="itemcategory",
+            name="cross_selling_mode",
+            field=models.CharField(null=True, max_length=5),
+        ),
+        migrations.AddField(
+            model_name="itemcategory",
+            name="cross_selling_match_products",
+            field=models.ManyToManyField(
+                related_name="matched_by_cross_selling_categories", to="pretixbase.item"
+            ),
+        ),
+    ]

src/pretix/base/migrations/0272_printlog.py

@@ -0,0 +1,79 @@
+# Generated by Django 4.2.16 on 2024-09-19 10:41
+
+import django.db.models.deletion
+import django.utils.timezone
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.OAUTH2_PROVIDER_APPLICATION_MODEL),
+        ("pretixbase", "0271_itemcategory_cross_selling"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="PrintLog",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True, primary_key=True, serialize=False
+                    ),
+                ),
+                ("datetime", models.DateTimeField(default=django.utils.timezone.now)),
+                ("created", models.DateTimeField(auto_now_add=True, null=True)),
+                ("successful", models.BooleanField(default=True)),
+                ("source", models.CharField(max_length=255)),
+                ("type", models.CharField(max_length=255)),
+                ("info", models.JSONField(default=dict)),
+                (
+                    "api_token",
+                    models.ForeignKey(
+                        null=True,
+                        on_delete=django.db.models.deletion.PROTECT,
+                        to="pretixbase.teamapitoken",
+                    ),
+                ),
+                (
+                    "device",
+                    models.ForeignKey(
+                        null=True,
+                        on_delete=django.db.models.deletion.PROTECT,
+                        related_name="print_logs",
+                        to="pretixbase.device",
+                    ),
+                ),
+                (
+                    "oauth_application",
+                    models.ForeignKey(
+                        null=True,
+                        on_delete=django.db.models.deletion.PROTECT,
+                        to=settings.OAUTH2_PROVIDER_APPLICATION_MODEL,
+                    ),
+                ),
+                (
+                    "position",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="print_logs",
+                        to="pretixbase.orderposition",
+                    ),
+                ),
+                (
+                    "user",
+                    models.ForeignKey(
+                        null=True,
+                        on_delete=django.db.models.deletion.PROTECT,
+                        related_name="print_logs",
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
+            ],
+            options={
+                "ordering": ("-datetime",),
+            },
+        ),
+    ]

src/pretix/base/migrations/0273_remove_checkinlist_auto_checkin_sales_channels.py

@@ -0,0 +1,48 @@
+# Generated by Django 4.2.16 on 2024-10-29 15:03
+
+from django.db import migrations
+
+
+def migrate_autocheckin(apps, schema_editor):
+    CheckinList = apps.get_model("pretixbase", "CheckinList")
+    AutoCheckinRule = apps.get_model("autocheckin", "AutoCheckinRule")
+
+    for cl in CheckinList.objects.filter(auto_checkin_sales_channels__isnull=False).select_related("event", "event__organizer"):
+        sales_channels = cl.auto_checkin_sales_channels.all()
+        all_sales_channels = cl.event.organizer.sales_channels.all()
+
+        if "pretix.plugins.autocheckin" not in cl.event.plugins:
+            cl.event.plugins = cl.event.plugins + ",pretix.plugins.autocheckin"
+            cl.event.save()
+
+        r = AutoCheckinRule.objects.get_or_create(
+            list=cl,
+            event=cl.event,
+            all_products=True,
+            all_payment_methods=True,
+            defaults=dict(
+                mode="placed",
+                all_sales_channels=len(sales_channels) == len(all_sales_channels),
+            )
+        )[0]
+        if len(sales_channels) != len(all_sales_channels):
+            r.limit_sales_channels.set(sales_channels)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretixbase", "0272_printlog"),
+        ("autocheckin", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.RunPython(
+            migrate_autocheckin,
+            migrations.RunPython.noop,
+        ),
+        migrations.RemoveField(
+            model_name="checkinlist",
+            name="auto_checkin_sales_channels",
+        ),
+    ]

src/pretix/base/modelimport.py

@@ -213,7 +213,13 @@ class DatetimeColumnMixin:
             except (ValueError, TypeError):
                 pass
         else:
-            raise ValidationError(_("Could not parse {value} as a date and time.").format(value=value))
+            try:
+                d = datetime.datetime.fromisoformat(value)
+                if not d.tzinfo:
+                    d = d.replace(tzinfo=self.timezone)
+                return d
+            except (ValueError, TypeError):
+                raise ValidationError(_("Could not parse {value} as a date and time.").format(value=value))
 
 
 class DecimalColumnMixin:
@@ -250,6 +256,9 @@ class SubeventColumnMixin:
         ]
 
     def clean(self, value, previous_values):
+        if not value:
+            return None
+
         if value in self._subevent_cache:
             return self._subevent_cache[value]
 

src/pretix/base/modelimport_orders.py

@@ -40,8 +40,8 @@ from phonenumbers import SUPPORTED_REGIONS
 
 from pretix.base.forms.questions import guess_country
 from pretix.base.modelimport import (
-    DatetimeColumnMixin, DecimalColumnMixin, ImportColumn, SubeventColumnMixin,
-    i18n_flat,
+    BooleanColumnMixin, DatetimeColumnMixin, DecimalColumnMixin, ImportColumn,
+    SubeventColumnMixin, i18n_flat,
 )
 from pretix.base.models import (
     Customer, ItemVariation, OrderPosition, Question, QuestionAnswer,
@@ -56,7 +56,7 @@ from pretix.base.signals import order_import_columns
 
 class EmailColumn(ImportColumn):
     identifier = 'email'
-    verbose_name = gettext_lazy('E-mail address')
+    verbose_name = gettext_lazy('Email address')
 
     def clean(self, value, previous_values):
         if value:
@@ -322,7 +322,7 @@ class AttendeeNamePart(ImportColumn):
 
 class AttendeeEmail(ImportColumn):
     identifier = 'attendee_email'
-    verbose_name = gettext_lazy('Attendee e-mail address')
+    verbose_name = gettext_lazy('Attendee email address')
 
     def clean(self, value, previous_values):
         if value:
@@ -604,6 +604,22 @@ class Comment(ImportColumn):
         order.comment = value or ''
 
 
+class CheckinAttentionColumn(BooleanColumnMixin, ImportColumn):
+    identifier = 'checkin_attention'
+    verbose_name = gettext_lazy('Requires special attention')
+
+    def assign(self, value, order, position, invoice_address, **kwargs):
+        order.checkin_attention = value
+
+
+class CheckinTextColumn(ImportColumn):
+    identifier = 'checkin_text'
+    verbose_name = gettext_lazy('Check-in text')
+
+    def assign(self, value, order, position, invoice_address, **kwargs):
+        order.checkin_text = value
+
+
 class QuestionColumn(ImportColumn):
     def __init__(self, event, q):
         self.q = q
@@ -742,6 +758,8 @@ def get_order_import_columns(event):
         ValidUntil(event),
         Locale(event),
         Saleschannel(event),
+        CheckinAttentionColumn(event),
+        CheckinTextColumn(event),
         Expires(event),
         Comment(event),
     ]

src/pretix/base/models/auth.py

@@ -241,7 +241,7 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
     REQUIRED_FIELDS = []
 
     email = models.EmailField(unique=True, db_index=True, null=True, blank=True,
-                              verbose_name=_('E-mail'), max_length=190)
+                              verbose_name=_('Email'), max_length=190)
     fullname = models.CharField(max_length=255, blank=True, null=True,
                                 verbose_name=_('Full name'))
     is_active = models.BooleanField(default=True,
@@ -571,13 +571,23 @@ class User(AbstractBaseUser, PermissionsMixin, LoggingMixin):
 
     def get_session_auth_hash(self):
         """
-        Return an HMAC that needs to
+        Return an HMAC that needs to be the same throughout the session, used e.g. for forced
+        logout after every password change.
+        """
+        return self._get_session_auth_hash(secret=settings.SECRET_KEY)
+
+    def get_session_auth_fallback_hash(self):
+        for fallback_secret in settings.SECRET_KEY_FALLBACKS:
+            yield self._get_session_auth_hash(secret=fallback_secret)
+
+    def _get_session_auth_hash(self, secret):
+        """
         """
         key_salt = "pretix.base.models.User.get_session_auth_hash"
         payload = self.password
         payload += self.email
         payload += self.session_token
-        return salted_hmac(key_salt, payload).hexdigest()
+        return salted_hmac(key_salt, payload, secret=secret).hexdigest()
 
     def update_session_token(self):
         self.session_token = generate_session_token()
@@ -654,3 +664,9 @@ class WebAuthnDevice(Device):
     @property
     def webauthnpubkey(self):
         return websafe_decode(self.pub_key)
+
+
+class HistoricPassword(models.Model):
+    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name="historic_passwords")
+    created = models.DateTimeField(auto_now_add=True)
+    password = models.CharField(verbose_name=_("Password"), max_length=128)

src/pretix/base/models/checkin.py

@@ -99,14 +99,6 @@ class CheckinList(LoggedModel):
         verbose_name=_('Automatically check out everyone at'),
         null=True, blank=True
     )
-    auto_checkin_sales_channels = models.ManyToManyField(
-        "SalesChannel",
-        verbose_name=_('Sales channels to automatically check in'),
-        help_text=_('This option is deprecated and will be removed in the next months. As a replacement, our new plugin '
-                    '"Auto check-in" can be used. When we remove this option, we will automatically migrate your event '
-                    'to use the new plugin.'),
-        blank=True,
-    )
     rules = models.JSONField(default=dict, blank=True)
 
     objects = ScopedManager(organizer='event__organizer')
@@ -141,7 +133,7 @@ class CheckinList(LoggedModel):
         return self.positions_query(ignore_status=False)
 
     @scopes_disabled()
-    def positions_inside_query(self, ignore_status=False, at_time=None):
+    def _filter_positions_inside(self, qs, at_time=None):
         if at_time is None:
             c_q = []
         else:
@@ -149,7 +141,7 @@ class CheckinList(LoggedModel):
 
         if "postgresql" not in settings.DATABASES["default"]["ENGINE"]:
             # Use a simple approach that works on all databases
-            qs = self.positions_query(ignore_status=ignore_status).annotate(
+            qs = qs.annotate(
                 last_entry=Subquery(
                     Checkin.objects.filter(
                         *c_q,
@@ -202,7 +194,7 @@ class CheckinList(LoggedModel):
             .values("position_id", "type", "datetime", "cnt_exists_after")
             .query.sql_with_params()
         )
-        return self.positions_query(ignore_status=ignore_status).filter(
+        return qs.filter(
             pk__in=RawSQL(
                 f"""
                 SELECT "position_id"
@@ -214,6 +206,10 @@ class CheckinList(LoggedModel):
             )
         )
 
+    @scopes_disabled()
+    def positions_inside_query(self, ignore_status=False, at_time=None):
+        return self._filter_positions_inside(self.positions_query(ignore_status=ignore_status), at_time=at_time)
+
     @property
     def positions_inside(self):
         return self.positions_inside_query(None)

src/pretix/base/models/customers.py

@@ -91,7 +91,7 @@ class Customer(LoggedModel):
             ),
         ],
     )
-    email = models.EmailField(db_index=True, null=True, blank=False, verbose_name=_('E-mail'), max_length=190)
+    email = models.EmailField(db_index=True, null=True, blank=False, verbose_name=_('Email'), max_length=190)
     phone = PhoneNumberField(null=True, blank=True, verbose_name=_('Phone number'))
     password = models.CharField(verbose_name=_('Password'), max_length=128)
     name_cached = models.CharField(max_length=255, verbose_name=_('Full name'), blank=True)
@@ -219,13 +219,24 @@ class Customer(LoggedModel):
         return is_password_usable(self.password)
 
     def get_session_auth_hash(self):
+        """
+        Return an HMAC that needs to be the same throughout the session, used e.g. for forced
+        logout after every password change.
+        """
+        return self._get_session_auth_hash(secret=settings.SECRET_KEY)
+
+    def get_session_auth_fallback_hash(self):
+        for fallback_secret in settings.SECRET_KEY_FALLBACKS:
+            yield self._get_session_auth_hash(secret=fallback_secret)
+
+    def _get_session_auth_hash(self, secret):
         """
         Return an HMAC of the password field.
         """
         key_salt = "pretix.base.models.customers.Customer.get_session_auth_hash"
         payload = self.password
         payload += self.email
-        return salted_hmac(key_salt, payload).hexdigest()
+        return salted_hmac(key_salt, payload, secret=secret).hexdigest()
 
     def get_email_context(self):
         from pretix.base.settings import get_name_parts_localized
@@ -381,7 +392,7 @@ class CustomerSSOClient(LoggedModel):
     SCOPE_CHOICES = (
         ('openid', _('OpenID Connect access (required)')),
         ('profile', _('Profile data (name, addresses)')),
-        ('email', _('E-mail address')),
+        ('email', _('Email address')),
         ('phone', _('Phone number')),
     )
 

src/pretix/base/models/devices.py

@@ -28,7 +28,6 @@ from django.utils.crypto import get_random_string
 from django.utils.translation import gettext_lazy as _
 from django_scopes import ScopedManager, scopes_disabled
 
-from pretix.api.auth.devicesecurity import DEVICE_SECURITY_PROFILES
 from pretix.base.models import LoggedModel
 
 
@@ -161,7 +160,6 @@ class Device(LoggedModel):
     )
     security_profile = models.CharField(
         max_length=190,
-        choices=[(k, v.verbose_name) for k, v in DEVICE_SECURITY_PROFILES.items()],
         default='full',
         null=True,
         blank=False

src/pretix/base/models/discount.py

@@ -20,11 +20,11 @@
 # <https://www.gnu.org/licenses/>.
 #
 
-from collections import defaultdict
+from collections import defaultdict, namedtuple
 from decimal import Decimal
 from itertools import groupby
-from math import ceil
-from typing import Dict, Optional, Tuple
+from math import ceil, inf
+from typing import Dict
 
 from django.core.exceptions import ValidationError
 from django.core.validators import MinValueValidator
@@ -36,6 +36,8 @@ from django_scopes import ScopedManager
 from pretix.base.decimal import round_decimal
 from pretix.base.models.base import LoggedModel
 
+PositionInfo = namedtuple('PositionInfo', ['item_id', 'subevent_id', 'line_price_gross', 'is_addon_to', 'voucher_discount'])
+
 
 class Discount(LoggedModel):
     SUBEVENT_MODE_MIXED = 'mixed'
@@ -245,22 +247,26 @@ class Discount(LoggedModel):
             return False
         return True
 
-    def _apply_min_value(self, positions, condition_idx_group, benefit_idx_group, result):
-        if self.condition_min_value and sum(positions[idx][2] for idx in condition_idx_group) < self.condition_min_value:
+    def _apply_min_value(self, positions, condition_idx_group, benefit_idx_group, result, collect_potential_discounts, subevent_id):
+        if self.condition_min_value and sum(positions[idx].line_price_gross for idx in condition_idx_group) < self.condition_min_value:
             return
 
         if self.condition_min_count or self.benefit_only_apply_to_cheapest_n_matches:
             raise ValueError('Validation invariant violated.')
 
         for idx in benefit_idx_group:
-            previous_price = positions[idx][2]
+            previous_price = positions[idx].line_price_gross
             new_price = round_decimal(
                 previous_price * (Decimal('100.00') - self.benefit_discount_matching_percent) / Decimal('100.00'),
                 self.event.currency,
             )
             result[idx] = new_price
 
-    def _apply_min_count(self, positions, condition_idx_group, benefit_idx_group, result):
+        if collect_potential_discounts is not None:
+            for idx in condition_idx_group:
+                collect_potential_discounts[idx] = [(self, inf, -1, subevent_id)]
+
+    def _apply_min_count(self, positions, condition_idx_group, benefit_idx_group, result, collect_potential_discounts, subevent_id):
         if len(condition_idx_group) < self.condition_min_count:
             return
 
@@ -268,23 +274,53 @@ class Discount(LoggedModel):
             raise ValueError('Validation invariant violated.')
 
         if self.benefit_only_apply_to_cheapest_n_matches:
-            if not self.condition_min_count:
-                raise ValueError('Validation invariant violated.')
-
-            condition_idx_group = sorted(condition_idx_group, key=lambda idx: (positions[idx][2], -idx))  # sort by line_price
-            benefit_idx_group = sorted(benefit_idx_group, key=lambda idx: (positions[idx][2], -idx))  # sort by line_price
+            # sort by line_price
+            condition_idx_group = sorted(condition_idx_group, key=lambda idx: (positions[idx].line_price_gross, -idx))
+            benefit_idx_group = sorted(benefit_idx_group, key=lambda idx: (positions[idx].line_price_gross, -idx))
 
             # Prevent over-consuming of items, i.e. if our discount is "buy 2, get 1 free", we only
             # want to match multiples of 3
-            n_groups = min(len(condition_idx_group) // self.condition_min_count, ceil(len(benefit_idx_group) / self.benefit_only_apply_to_cheapest_n_matches))
+
+            # how many discount applications are allowed according to condition products in cart
+            possible_applications_cond = len(condition_idx_group) // self.condition_min_count
+
+            # how many discount applications are possible according to benefitting products in cart
+            possible_applications_benefit = ceil(len(benefit_idx_group) / self.benefit_only_apply_to_cheapest_n_matches)
+
+            n_groups = min(possible_applications_cond, possible_applications_benefit)
             consume_idx = condition_idx_group[:n_groups * self.condition_min_count]
             benefit_idx = benefit_idx_group[:n_groups * self.benefit_only_apply_to_cheapest_n_matches]
+
+            if collect_potential_discounts is not None:
+                if n_groups * self.benefit_only_apply_to_cheapest_n_matches > len(benefit_idx_group):
+                    # partially used discount ("for each 1 ticket you buy, get 50% on 2 t-shirts", cart content: 1 ticket
+                    # but only 1 t-shirt) -> 1 shirt definitiv potential discount
+                    for idx in consume_idx:
+                        collect_potential_discounts[idx] = [
+                            (self, n_groups * self.benefit_only_apply_to_cheapest_n_matches - len(benefit_idx_group), -1, subevent_id)
+                        ]
+
+                if possible_applications_cond * self.benefit_only_apply_to_cheapest_n_matches > len(benefit_idx_group):
+                    # unused discount ("for each 1 ticket you buy, get 50% on 2 t-shirts", cart content: 1 ticket
+                    # but 0 t-shirts) -> 2 shirt maybe potential discount (if the 1 ticket is not consumed by a later discount)
+                    for i, idx in enumerate(condition_idx_group[
+                                            n_groups * self.condition_min_count:
+                                            possible_applications_cond * self.condition_min_count
+                                            ]):
+                        collect_potential_discounts[idx] += [
+                            (self, self.benefit_only_apply_to_cheapest_n_matches, i // self.condition_min_count, subevent_id)
+                        ]
+
         else:
             consume_idx = condition_idx_group
             benefit_idx = benefit_idx_group
 
+            if collect_potential_discounts is not None:
+                for idx in consume_idx:
+                    collect_potential_discounts[idx] = [(self, inf, -1, subevent_id)]
+
         for idx in benefit_idx:
-            previous_price = positions[idx][2]
+            previous_price = positions[idx].line_price_gross
             new_price = round_decimal(
                 previous_price * (Decimal('100.00') - self.benefit_discount_matching_percent) / Decimal('100.00'),
                 self.event.currency,
@@ -292,15 +328,16 @@ class Discount(LoggedModel):
             result[idx] = new_price
 
         for idx in consume_idx:
-            result.setdefault(idx, positions[idx][2])
+            result.setdefault(idx, positions[idx].line_price_gross)
 
-    def apply(self, positions: Dict[int, Tuple[int, Optional[int], Decimal, bool, Decimal]]) -> Dict[int, Decimal]:
+    def apply(self, positions: Dict[int, PositionInfo],
+              collect_potential_discounts=None) -> Dict[int, Decimal]:
         """
         Tries to apply this discount to a cart
 
-        :param positions: Dictionary mapping IDs to tuples of the form
-                          ``(item_id, subevent_id, line_price_gross, is_addon_to, voucher_discount)``.
+        :param positions: Dictionary mapping IDs to PositionInfo tuples.
                           Bundled positions may not be included.
+        :param collect_potential_discounts: For detailed description, see pretix.base.services.pricing.apply_discounts
 
         :return: A dictionary mapping keys from the input dictionary to new prices. All positions
                  contained in this dictionary are considered "consumed" and should not be considered
@@ -342,13 +379,13 @@ class Discount(LoggedModel):
 
         if self.subevent_mode == self.SUBEVENT_MODE_MIXED:  # also applies to non-series events
             if self.condition_min_count:
-                self._apply_min_count(positions, condition_candidates, benefit_candidates, result)
+                self._apply_min_count(positions, condition_candidates, benefit_candidates, result, collect_potential_discounts, None)
             else:
-                self._apply_min_value(positions, condition_candidates, benefit_candidates, result)
+                self._apply_min_value(positions, condition_candidates, benefit_candidates, result, collect_potential_discounts, None)
 
         elif self.subevent_mode == self.SUBEVENT_MODE_SAME:
             def key(idx):
-                return positions[idx][1] or 0  # subevent_id
+                return positions[idx].subevent_id or 0
 
             # Build groups of candidates with the same subevent, then apply our regular algorithm
             # to each group
@@ -357,11 +394,11 @@ class Discount(LoggedModel):
             candidate_groups = [(k, list(g)) for k, g in _groups]
 
             for subevent_id, g in candidate_groups:
-                benefit_g = [idx for idx in benefit_candidates if positions[idx][1] == subevent_id]
+                benefit_g = [idx for idx in benefit_candidates if positions[idx].subevent_id == subevent_id]
                 if self.condition_min_count:
-                    self._apply_min_count(positions, g, benefit_g, result)
+                    self._apply_min_count(positions, g, benefit_g, result, collect_potential_discounts, subevent_id)
                 else:
-                    self._apply_min_value(positions, g, benefit_g, result)
+                    self._apply_min_value(positions, g, benefit_g, result, collect_potential_discounts, subevent_id)
 
         elif self.subevent_mode == self.SUBEVENT_MODE_DISTINCT:
             if self.condition_min_value or not self.benefit_same_products:
@@ -377,9 +414,9 @@ class Discount(LoggedModel):
             # Build a list of subevent IDs in descending order of frequency
             subevent_to_idx = defaultdict(list)
             for idx, p in positions.items():
-                subevent_to_idx[p[1]].append(idx)
+                subevent_to_idx[p.subevent_id].append(idx)
             for v in subevent_to_idx.values():
-                v.sort(key=lambda idx: positions[idx][2])
+                v.sort(key=lambda idx: positions[idx].line_price_gross)
             subevent_order = sorted(list(subevent_to_idx.keys()), key=lambda s: len(subevent_to_idx[s]), reverse=True)
 
             # Build groups of exactly condition_min_count distinct subevents
@@ -394,7 +431,7 @@ class Discount(LoggedModel):
                     l = [ll for ll in l if ll in condition_candidates and ll not in current_group]
                     if cardinality and len(l) != cardinality:
                         continue
-                    if se not in {positions[idx][1] for idx in current_group}:
+                    if se not in {positions[idx].subevent_id for idx in current_group}:
                         candidates += l
                         cardinality = len(l)
 
@@ -403,7 +440,7 @@ class Discount(LoggedModel):
 
                 # Sort the list by prices, then pick one. For "buy 2 get 1 free" we apply a "pick 1 from the start
                 # and 2 from the end" scheme to optimize price distribution among groups
-                candidates = sorted(candidates, key=lambda idx: positions[idx][2])
+                candidates = sorted(candidates, key=lambda idx: positions[idx].line_price_gross)
                 if len(current_group) < (self.benefit_only_apply_to_cheapest_n_matches or 0):
                     candidate = candidates[0]
                 else:
@@ -415,14 +452,14 @@ class Discount(LoggedModel):
                 if len(current_group) >= max(self.condition_min_count, 1):
                     candidate_groups.append(current_group)
                     for c in current_group:
-                        subevent_to_idx[positions[c][1]].remove(c)
+                        subevent_to_idx[positions[c].subevent_id].remove(c)
                     current_group = []
 
             # Distribute "leftovers"
             for se in subevent_order:
                 if subevent_to_idx[se]:
                     for group in candidate_groups:
-                        if se not in {positions[idx][1] for idx in group}:
+                        if se not in {positions[idx].subevent_id for idx in group}:
                             group.append(subevent_to_idx[se].pop())
                             if not subevent_to_idx[se]:
                                 break
@@ -432,6 +469,8 @@ class Discount(LoggedModel):
                     positions,
                     [idx for idx in g if idx in condition_candidates],
                     [idx for idx in g if idx in benefit_candidates],
-                    result
+                    result,
+                    None,
+                    None
                 )
         return result

src/pretix/base/models/event.py

@@ -823,6 +823,9 @@ class Event(EventMixin, LoggedModel):
         self.save()
         self.log_action('pretix.object.cloned', data={'source': other.slug, 'source_id': other.pk})
 
+        if hasattr(other, 'alternative_domain_assignment'):
+            other.alternative_domain_assignment.domain.event_assignments.create(event=self)
+
         if not self.all_sales_channels:
             self.limit_sales_channels.set(
                 self.organizer.sales_channels.filter(
@@ -870,10 +873,12 @@ class Event(EventMixin, LoggedModel):
         for i in Item.objects.filter(event=other).prefetch_related(
             'variations', 'limit_sales_channels', 'require_membership_types',
             'variations__limit_sales_channels', 'variations__require_membership_types',
+            'matched_by_cross_selling_categories',
         ):
             vars = list(i.variations.all())
             require_membership_types = list(i.require_membership_types.all())
             limit_sales_channels = list(i.limit_sales_channels.all())
+            matched_by_cross_selling_categories = list(i.matched_by_cross_selling_categories.all())
             item_map[i.pk] = i
             i.pk = None
             i.event = self
@@ -911,6 +916,9 @@ class Event(EventMixin, LoggedModel):
                 if not v.all_sales_channels:
                     v.limit_sales_channels.set(self.organizer.sales_channels.filter(identifier__in=[s.identifier for s in limit_sales_channels]))
 
+            if matched_by_cross_selling_categories:
+                i.matched_by_cross_selling_categories.set([category_map[c.pk] for c in matched_by_cross_selling_categories])
+
         for i in self.items.filter(hidden_if_item_available__isnull=False):
             i.hidden_if_item_available = item_map[i.hidden_if_item_available_id]
             i.save()
@@ -1019,10 +1027,9 @@ class Event(EventMixin, LoggedModel):
 
         checkin_list_map = {}
         for cl in other.checkin_lists.filter(subevent__isnull=True).prefetch_related(
-            'limit_products', 'auto_checkin_sales_channels'
+            'limit_products'
         ):
             items = list(cl.limit_products.all())
-            auto_checkin_sales_channels = list(cl.auto_checkin_sales_channels.all())
             checkin_list_map[cl.pk] = cl
             cl.pk = None
             cl._prefetched_objects_cache = {}
@@ -1034,8 +1041,6 @@ class Event(EventMixin, LoggedModel):
             cl.log_action('pretix.object.cloned')
             for i in items:
                 cl.limit_products.add(item_map[i.pk])
-            if auto_checkin_sales_channels:
-                cl.auto_checkin_sales_channels.set(self.organizer.sales_channels.filter(identifier__in=[s.identifier for s in auto_checkin_sales_channels]))
 
         if other.seating_plan:
             if other.seating_plan.organizer_id == self.organizer_id:

src/pretix/base/models/items.py

@@ -63,14 +63,13 @@ from django_countries.fields import Country
 from django_scopes import ScopedManager
 from i18nfield.fields import I18nCharField, I18nTextField
 
+from pretix.base.media import MEDIA_TYPES
+from pretix.base.models import Event, SubEvent
 from pretix.base.models.base import LoggedModel
 from pretix.base.models.fields import MultiStringField
 from pretix.base.models.tax import TaxedPrice
 from pretix.base.timemachine import time_machine_now
-
-from ...helpers.images import ImageSizeValidator
-from ..media import MEDIA_TYPES
-from .event import Event, SubEvent
+from pretix.helpers.images import ImageSizeValidator
 
 
 class ItemCategory(LoggedModel):
@@ -111,6 +110,33 @@ class ItemCategory(LoggedModel):
                     'only be bought in combination with a product that has this category configured as a possible '
                     'source for add-ons.')
     )
+    CROSS_SELLING_MODES = (
+        (None, _('Normal category')),
+        ('both', _('Normal + cross-selling category')),
+        ('only', _('Cross-selling category')),
+    )
+    cross_selling_mode = models.CharField(
+        choices=CROSS_SELLING_MODES,
+        null=True,
+        max_length=5
+    )
+    CROSS_SELLING_CONDITION = (
+        ('always', _('Always show in cross-selling step')),
+        ('discounts', _('Only show products that qualify for a discount according to discount rules')),
+        ('products', _('Only show if the cart contains one of the following products')),
+    )
+    cross_selling_condition = models.CharField(
+        verbose_name=_("Cross-selling condition"),
+        choices=CROSS_SELLING_CONDITION,
+        null=True,
+        max_length=10,
+    )
+    cross_selling_match_products = models.ManyToManyField(
+        'pretixbase.Item',
+        blank=True,
+        verbose_name=_("Cross-selling condition products"),
+        related_name="matched_by_cross_selling_categories",
+    )
 
     class Meta:
         verbose_name = _("Product category")
@@ -119,19 +145,31 @@ class ItemCategory(LoggedModel):
 
     def __str__(self):
         name = self.internal_name or self.name
-        if self.is_addon:
-            return _('{category} (Add-On products)').format(category=str(name))
+        if self.category_type != 'normal':
+            return _('{category} ({category_type})').format(category=str(name),
+                                                            category_type=self.get_category_type_display())
         return str(name)
 
     def get_category_type_display(self):
         if self.is_addon:
-            return _('Add-On products')
+            return _('Add-on category')
+        elif self.cross_selling_mode:
+            return self.get_cross_selling_mode_display()
         else:
-            return None
+            return _('Normal category')
 
     @property
     def category_type(self):
-        return 'addon' if self.is_addon else 'normal'
+        return 'addon' if self.is_addon else self.cross_selling_mode or 'normal'
+
+    @category_type.setter
+    def category_type(self, new_value):
+        if new_value == 'addon':
+            self.is_addon = True
+            self.cross_selling_mode = None
+        else:
+            self.is_addon = False
+            self.cross_selling_mode = None if new_value == 'normal' else new_value
 
     def delete(self, *args, **kwargs):
         super().delete(*args, **kwargs)
@@ -270,7 +308,7 @@ class SubEventItemVariation(models.Model):
         return True
 
 
-def filter_available(qs, channel='web', voucher=None, allow_addons=False):
+def filter_available(qs, channel='web', voucher=None, allow_addons=False, allow_cross_sell=False):
     # Channel can currently be a SalesChannel or a str, since we need that compatibility, but a SalesChannel
     # makes the query SIGNIFICANTLY faster
     from .organizer import SalesChannel
@@ -291,6 +329,8 @@ def filter_available(qs, channel='web', voucher=None, allow_addons=False):
 
     if not allow_addons:
         q &= Q(Q(category__isnull=True) | Q(category__is_addon=False))
+    if not allow_cross_sell:
+        q &= Q(Q(category__isnull=True) | ~Q(category__cross_selling_mode='only'))
 
     if voucher:
         if voucher.item_id:
@@ -304,8 +344,8 @@ def filter_available(qs, channel='web', voucher=None, allow_addons=False):
 
 
 class ItemQuerySet(models.QuerySet):
-    def filter_available(self, channel='web', voucher=None, allow_addons=False):
-        return filter_available(self, channel, voucher, allow_addons)
+    def filter_available(self, channel='web', voucher=None, allow_addons=False, allow_cross_sell=False):
+        return filter_available(self, channel, voucher, allow_addons, allow_cross_sell)
 
 
 class ItemQuerySetManager(ScopedManager(organizer='event__organizer').__class__):
@@ -313,8 +353,8 @@ class ItemQuerySetManager(ScopedManager(organizer='event__organizer').__class__)
         super().__init__()
         self._queryset_class = ItemQuerySet
 
-    def filter_available(self, channel='web', voucher=None, allow_addons=False):
-        return filter_available(self.get_queryset(), channel, voucher, allow_addons)
+    def filter_available(self, channel='web', voucher=None, allow_addons=False, allow_cross_sell=False):
+        return filter_available(self.get_queryset(), channel, voucher, allow_addons, allow_cross_sell)
 
 
 class Item(LoggedModel):
@@ -1078,13 +1118,12 @@ class ItemVariation(models.Model):
     :param original_price: The item's "original" price. Will not be used for any calculations, will just be shown.
     :type original_price: decimal.Decimal
     :param require_approval: If set to ``True``, orders containing this variation can only be processed and paid after
-    approval by an administrator
+                             approval by an administrator
     :type require_approval: bool
     :param all_sales_channels: A flag indicating that this variation is available on all channels and limit_sales_channels will be ignored.
     :type all_sales_channels: bool
     :param limit_sales_channels: A list of sales channel identifiers, that this variation is available for sale on.
     :type limit_sales_channels: list
-
     """
     item = models.ForeignKey(
         Item,

src/pretix/base/models/memberships.py

@@ -159,10 +159,24 @@ class Membership(models.Model):
         de = date_format(self.date_end, 'SHORT_DATE_FORMAT')
         return f'{self.membership_type.name}: {self.attendee_name} ({ds} – {de})'
 
+    @property
+    def percentage_used(self):
+        if self.membership_type.max_usages and self.usages:
+            return int(self.usages / self.membership_type.max_usages * 100)
+        return 0
+
     @property
     def attendee_name(self):
         return build_name(self.attendee_name_parts, fallback_scheme=lambda: self.customer.organizer.settings.name_scheme)
 
+    @property
+    def expired(self):
+        return time_machine_now() > self.date_end
+
+    @property
+    def not_yet_valid(self):
+        return time_machine_now() < self.date_start
+
     def is_valid(self, ev=None, ticket_valid_from=None, valid_from_not_chosen=False):
         if valid_from_not_chosen:
             return not self.canceled and self.date_end >= time_machine_now()

src/pretix/base/models/notifications.py

@@ -43,7 +43,7 @@ class NotificationSetting(models.Model):
     :type enabled: bool
     """
     CHANNELS = (
-        ('mail', _('E-mail')),
+        ('mail', _('Email')),
     )
     user = models.ForeignKey('User', on_delete=models.CASCADE,
                              related_name='notification_settings')

src/pretix/base/models/orders.py

@@ -40,6 +40,7 @@ import json
 import logging
 import operator
 import string
+import warnings
 from collections import Counter
 from datetime import datetime, time, timedelta
 from decimal import Decimal
@@ -241,7 +242,7 @@ class Order(LockModel, LoggedModel):
     )
     email = models.EmailField(
         null=True, blank=True,
-        verbose_name=_('E-mail')
+        verbose_name=_('Email')
     )
     phone = PhoneNumberField(
         null=True, blank=True,
@@ -316,7 +317,7 @@ class Order(LockModel, LoggedModel):
     )
     email_known_to_work = models.BooleanField(
         default=False,
-        verbose_name=_('E-mail address verified')
+        verbose_name=_('Email address verified')
     )
     invoice_dirty = models.BooleanField(
         # Invoice needs to be re-issued when the order is paid again
@@ -381,8 +382,28 @@ class Order(LockModel, LoggedModel):
         self.event.cache.delete('complain_testmode_orders')
         self.delete()
 
+    def email_confirm_secret(self):
+        return self.tagged_secret("email_confirm", 9)
+
     def email_confirm_hash(self):
-        return hashlib.sha256(settings.SECRET_KEY.encode() + self.secret.encode()).hexdigest()[:9]
+        warnings.warn('Use email_confirm_secret() instead of email_confirm_hash().',
+                      DeprecationWarning)
+        return self.email_confirm_secret()
+
+    def check_email_confirm_secret(self, received_secret):
+        return (
+            hmac.compare_digest(
+                self.tagged_secret("email_confirm", 9),
+                received_secret[:9].lower()
+            ) or any(
+                # TODO: remove this clause after a while (compatibility with old secrets currently in flight)
+                hmac.compare_digest(
+                    hashlib.sha256(sk.encode() + self.secret.encode()).hexdigest()[:9],
+                    received_secret
+                )
+                for sk in [settings.SECRET_KEY, *settings.SECRET_KEY_FALLBACKS]
+            )
+        )
 
     def get_extended_status_display(self):
         # Changes in this method should to be replicated in pretixcontrol/orders/fragment_order_status.html
@@ -2254,6 +2275,7 @@ class OrderFee(models.Model):
     FEE_TYPE_SERVICE = "service"
     FEE_TYPE_CANCELLATION = "cancellation"
     FEE_TYPE_INSURANCE = "insurance"
+    FEE_TYPE_LATE = "late"
     FEE_TYPE_OTHER = "other"
     FEE_TYPE_GIFTCARD = "giftcard"
     FEE_TYPES = (
@@ -2262,6 +2284,7 @@ class OrderFee(models.Model):
         (FEE_TYPE_SERVICE, _("Service fee")),
         (FEE_TYPE_CANCELLATION, _("Cancellation fee")),
         (FEE_TYPE_INSURANCE, _("Insurance fee")),
+        (FEE_TYPE_LATE, _("Late fee")),
         (FEE_TYPE_OTHER, _("Other fees")),
         (FEE_TYPE_GIFTCARD, _("Gift card")),
     )
@@ -2835,6 +2858,14 @@ class OrderPosition(AbstractPosition):
             (self.order.event.settings.change_allow_user_addons and ItemAddOn.objects.filter(base_item_id__in=[op.item_id for op in positions]).exists())
         )
 
+    @property
+    def code(self):
+        """
+        A ticket code which is unique among all events of a single organizer,
+        built by the order code and the position number.
+        """
+        return '{order_code}-{position}'.format(order_code=self.order.code, position=self.positionid)
+
 
 class Transaction(models.Model):
     """
@@ -3175,9 +3206,9 @@ class InvoiceAddress(models.Model):
     company = models.CharField(max_length=255, blank=True, verbose_name=_('Company name'))
     name_cached = models.CharField(max_length=255, verbose_name=_('Full name'), blank=True)
     name_parts = models.JSONField(default=dict)
-    street = models.TextField(verbose_name=_('Address'), blank=False)
-    zipcode = models.CharField(max_length=30, verbose_name=_('ZIP code'), blank=False)
-    city = models.CharField(max_length=255, verbose_name=_('City'), blank=False)
+    street = models.TextField(verbose_name=_('Address'), blank=True)
+    zipcode = models.CharField(max_length=30, verbose_name=_('ZIP code'), blank=True)
+    city = models.CharField(max_length=255, verbose_name=_('City'), blank=True)
     country_old = models.CharField(max_length=255, verbose_name=_('Country'), blank=False)
     country = FastCountryField(verbose_name=_('Country'), blank=False, blank_label=_('Select country'),
                                countries=CachedCountries)
@@ -3362,6 +3393,74 @@ class BlockedTicketSecret(models.Model):
         unique_together = (('event', 'secret'),)
 
 
+class PrintLog(models.Model):
+    """
+    A print log object is created when a ticket or badge is printed with our apps.
+    """
+    TYPE_BADGE = 'badge'
+    TYPE_TICKET = 'ticket'
+    TYPE_CERTIFICATE = 'certificate'
+    TYPE_OTHER = 'other'
+    PRINT_TYPES = (
+        (TYPE_BADGE, _('Badge')),
+        (TYPE_TICKET, _('Ticket')),
+        (TYPE_CERTIFICATE, _('Certificate')),
+        (TYPE_OTHER, _('Other')),
+    )
+
+    position = models.ForeignKey(
+        'pretixbase.OrderPosition',
+        related_name='print_logs',
+        on_delete=models.CASCADE,
+    )
+    successful = models.BooleanField(
+        default=True,
+    )
+
+    # Datetime of checkin, might be different from created if past scans are uploaded
+    datetime = models.DateTimeField(default=now)
+
+    # Datetime of creation on server
+    created = models.DateTimeField(auto_now_add=True, null=True, blank=True)
+
+    # Who printed?
+    device = models.ForeignKey('Device', related_name='print_logs', null=True, blank=True, on_delete=models.PROTECT)
+    user = models.ForeignKey('User', related_name='print_logs', 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)
+
+    # Source = Tag field with undefined values, e.g. name of app ("pretixscan")
+    source = models.CharField(max_length=255)
+
+    # Type = Type of object printed ("badge", "ticket")
+    type = models.CharField(max_length=255, choices=PRINT_TYPES)
+
+    info = models.JSONField(default=dict)
+
+    objects = ScopedManager(organizer='position__order__event__organizer')
+
+    class Meta:
+        ordering = (('-datetime'),)
+
+    def __repr__(self):
+        return "<PrintLog: pos {} at {} from {}>".format(
+            self.position, self.datetime, self.source
+        )
+
+    def save(self, **kwargs):
+        super().save(**kwargs)
+        if self.position:
+            self.position.order.touch()
+
+    def delete(self, **kwargs):
+        super().delete(**kwargs)
+        self.position.order.touch()
+
+    @property
+    def is_late_upload(self):
+        return self.created and abs(self.created - self.datetime) > timedelta(minutes=2)
+
+
 @receiver(post_delete, sender=CachedTicket)
 def cachedticket_delete(sender, instance, **kwargs):
     if instance.file:

src/pretix/base/models/seating.py

@@ -53,6 +53,30 @@ class SeatingPlanLayoutValidator:
             e = str(e).replace('%', '%%')
             raise ValidationError(_('Your layout file is not a valid seating plan. Error message: {}').format(e))
 
+        try:
+            seat_guids = set()
+            for z in val["zones"]:
+                for r in z["rows"]:
+                    for s in r["seats"]:
+                        if not s.get("seat_guid"):
+                            raise ValidationError(
+                                _("Seat with zone {zone}, row {row}, and number {number} has no seat ID.").format(
+                                    zone=z["name"],
+                                    row=r["row_number"],
+                                    number=s["seat_number"],
+                                )
+                            )
+                        elif s["seat_guid"] in seat_guids:
+                            raise ValidationError(
+                                _("Multiple seats have the same ID: {id}").format(
+                                    id=s["seat_guid"],
+                                )
+                            )
+
+                        seat_guids.add(s["seat_guid"])
+        except ValidationError as e:
+            raise ValidationError(_('Your layout file is not a valid seating plan. Error message: {}').format(", ".join(e.message for e in e.error_list)))
+
 
 class SeatingPlan(LoggedModel):
     """

src/pretix/base/models/tax.py

@@ -29,6 +29,8 @@ from django.core.validators import MaxValueValidator, MinValueValidator
 from django.db import models
 from django.utils.deconstruct import deconstructible
 from django.utils.formats import localize
+from django.utils.functional import lazy
+from django.utils.html import format_html
 from django.utils.translation import gettext_lazy as _, pgettext
 from i18nfield.fields import I18nCharField
 from i18nfield.strings import LazyI18nString
@@ -120,6 +122,8 @@ EU_CURRENCIES = {
 }
 VAT_ID_COUNTRIES = EU_COUNTRIES | {'CH', 'NO'}
 
+format_html_lazy = lazy(format_html, str)
+
 
 def is_eu_country(cc):
     cc = str(cc)
@@ -193,11 +197,17 @@ class TaxRule(LoggedModel):
     eu_reverse_charge = models.BooleanField(
         verbose_name=_("Use EU reverse charge taxation rules"),
         default=False,
-        help_text=_("Not recommended. Most events will NOT be qualified for reverse charge since the place of "
-                    "taxation is the location of the event. This option disables charging VAT for all customers "
-                    "outside the EU and for business customers in different EU countries who entered a valid EU VAT "
-                    "ID. Only enable this option after consulting a tax counsel. No warranty given for correct tax "
-                    "calculation. USE AT YOUR OWN RISK.")
+        help_text=format_html_lazy(
+            '<span class="label label-warning" data-toggle="tooltip" title="{}">{}</span> {}',
+            _('This feature will be removed in the future as it does not handle VAT for non-business customers in '
+              'other EU countries in a way that works for all organizers. Use custom rules instead.'),
+            _('DEPRECATED'),
+            _("Not recommended. Most events will NOT be qualified for reverse charge since the place of "
+              "taxation is the location of the event. This option disables charging VAT for all customers "
+              "outside the EU and for business customers in different EU countries who entered a valid EU VAT "
+              "ID. Only enable this option after consulting a tax counsel. No warranty given for correct tax "
+              "calculation. USE AT YOUR OWN RISK.")
+        ),
     )
     home_country = FastCountryField(
         verbose_name=_('Merchant country'),
@@ -294,10 +304,24 @@ class TaxRule(LoggedModel):
                     subtract_from_gross = Decimal('0.00')
                 rate = adjust_rate
 
+        def _limit_subtract(base_price, subtract_from_gross):
+            if not subtract_from_gross:
+                return base_price
+            if base_price >= Decimal('0.00'):
+                # For positive prices, make sure they don't go negative because of bundles
+                return max(Decimal('0.00'), base_price - subtract_from_gross)
+            else:
+                # If the price is already negative, we don't really care any more
+                return base_price - subtract_from_gross
+
         if rate == Decimal('0.00'):
+            gross = _limit_subtract(base_price, subtract_from_gross)
             return TaxedPrice(
-                net=base_price - subtract_from_gross, gross=base_price - subtract_from_gross, tax=Decimal('0.00'),
-                rate=rate, name=self.name
+                net=gross,
+                gross=gross,
+                tax=Decimal('0.00'),
+                rate=rate,
+                name=self.name,
             )
 
         if base_price_is == 'auto':
@@ -307,19 +331,14 @@ class TaxRule(LoggedModel):
                 base_price_is = 'net'
 
         if base_price_is == 'gross':
-            if base_price >= Decimal('0.00'):
-                # For positive prices, make sure they don't go negative because of bundles
-                gross = max(Decimal('0.00'), base_price - subtract_from_gross)
-            else:
-                # If the price is already negative, we don't really care any more
-                gross = base_price - subtract_from_gross
+            gross = _limit_subtract(base_price, subtract_from_gross)
             net = round_decimal(gross - (gross * (1 - 100 / (100 + rate))),
                                 currency)
         elif base_price_is == 'net':
             net = base_price
             gross = round_decimal((net * (1 + rate / 100)), currency)
             if subtract_from_gross:
-                gross -= subtract_from_gross
+                gross = _limit_subtract(gross, subtract_from_gross)
                 net = round_decimal(gross - (gross * (1 - 100 / (100 + rate))),
                                     currency)
         else:

src/pretix/base/models/waitinglist.py

@@ -73,7 +73,7 @@ class WaitingListEntry(LoggedModel):
         blank=True, default=dict
     )
     email = models.EmailField(
-        verbose_name=_("E-mail address")
+        verbose_name=_("Email address")
     )
     phone = PhoneNumberField(
         null=True, blank=True,

src/pretix/base/services/cart.py

@@ -343,11 +343,13 @@ class CartManager:
                 err = error_messages['some_subevent_not_started']
                 cp.addons.all().delete()
                 cp.delete()
+                continue
 
             if cp.subevent and cp.subevent.presale_end and time_machine_now(self.real_now_dt) > cp.subevent.presale_end:
                 err = error_messages['some_subevent_ended']
                 cp.addons.all().delete()
                 cp.delete()
+                continue
 
             if cp.subevent:
                 tlv = self.event.settings.get('payment_term_last', as_type=RelativeDateWrapper)
@@ -360,6 +362,7 @@ class CartManager:
                         err = error_messages['some_subevent_ended']
                         cp.addons.all().delete()
                         cp.delete()
+                        continue
         return err
 
     def _update_subevents_cache(self, se_ids: List[int]):
@@ -1542,10 +1545,9 @@ def add_items_to_cart(self, event: int, items: List[dict], cart_id: str=None, lo
 @app.task(base=ProfiledEventTask, bind=True, max_retries=5, default_retry_delay=1, throws=(CartError,))
 def apply_voucher(self, event: Event, voucher: str, cart_id: str=None, locale='en', sales_channel='web', override_now_dt: datetime=None) -> None:
     """
-    Removes a list of items from a user's cart.
     :param event: The event ID in question
     :param voucher: A voucher code
-    :param session: Session ID of a guest
+    :param cart_id: The cart ID of the cart to modify
     """
     with language(locale), time_machine_now_assigned(override_now_dt):
         try:
@@ -1566,10 +1568,10 @@ def apply_voucher(self, event: Event, voucher: str, cart_id: str=None, locale='e
 @app.task(base=ProfiledEventTask, bind=True, max_retries=5, default_retry_delay=1, throws=(CartError,))
 def remove_cart_position(self, event: Event, position: int, cart_id: str=None, locale='en', sales_channel='web', override_now_dt: datetime=None) -> None:
     """
-    Removes a list of items from a user's cart.
+    Removes an item specified by its position ID from a user's cart.
     :param event: The event ID in question
     :param position: A cart position ID
-    :param session: Session ID of a guest
+    :param cart_id: The cart ID of the cart to modify
     """
     with language(locale), time_machine_now_assigned(override_now_dt):
         try:
@@ -1590,9 +1592,9 @@ def remove_cart_position(self, event: Event, position: int, cart_id: str=None, l
 @app.task(base=ProfiledEventTask, bind=True, max_retries=5, default_retry_delay=1, throws=(CartError,))
 def clear_cart(self, event: Event, cart_id: str=None, locale='en', sales_channel='web', override_now_dt: datetime=None) -> None:
     """
-    Removes a list of items from a user's cart.
+    Removes all items from a user's cart.
     :param event: The event ID in question
-    :param session: Session ID of a guest
+    :param cart_id: The cart ID of the cart to modify
     """
     with language(locale), time_machine_now_assigned(override_now_dt):
         try:
@@ -1611,13 +1613,15 @@ def clear_cart(self, event: Event, cart_id: str=None, locale='en', sales_channel
 
 
 @app.task(base=ProfiledEventTask, bind=True, max_retries=5, default_retry_delay=1, throws=(CartError,))
-def set_cart_addons(self, event: Event, addons: List[dict], cart_id: str=None, locale='en',
+def set_cart_addons(self, event: Event, addons: List[dict], add_to_cart_items: List[dict], cart_id: str=None, locale='en',
                     invoice_address: int=None, sales_channel='web', override_now_dt: datetime=None) -> None:
     """
-    Removes a list of items from a user's cart.
+    Assigns addons to eligible products in a user's cart, adding and removing the addon products as necessary to
+    ensure the requested addon state.
     :param event: The event ID in question
     :param addons: A list of dicts with the keys addon_to, item, variation
-    :param session: Session ID of a guest
+    :param add_to_cart_items: A list of dicts with the keys item, variation, count, custom_price, voucher, seat ID
+    :param cart_id: The cart ID of the cart to modify
     """
     with language(locale), time_machine_now_assigned(override_now_dt):
         ia = False
@@ -1635,6 +1639,7 @@ def set_cart_addons(self, event: Event, addons: List[dict], cart_id: str=None, l
             try:
                 cm = CartManager(event=event, cart_id=cart_id, invoice_address=ia, sales_channel=sales_channel)
                 cm.set_addons(addons)
+                cm.add_new_items(add_to_cart_items)
                 cm.commit()
             except LockTimeoutException:
                 self.retry()

src/pretix/base/services/checkin.py

@@ -57,7 +57,7 @@ from pretix.base.models import (
     Checkin, CheckinList, Device, Event, Gate, Item, ItemVariation, Order,
     OrderPosition, QuestionOption,
 )
-from pretix.base.signals import checkin_created, order_placed, periodic_task
+from pretix.base.signals import checkin_created, periodic_task
 from pretix.helpers import OF_SELF
 from pretix.helpers.jsonlogic import Logic
 from pretix.helpers.jsonlogic_boolalg import convert_to_dnf
@@ -1154,23 +1154,6 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
             )
 
 
-@receiver(order_placed, dispatch_uid="legacy_autocheckin_order_placed")
-def order_placed(sender, **kwargs):
-    order = kwargs['order']
-    event = sender
-
-    cls = list(event.checkin_lists.filter(auto_checkin_sales_channels=order.sales_channel).prefetch_related(
-        'limit_products'))
-    if not cls:
-        return
-    for op in order.positions.all():
-        for cl in cls:
-            if cl.all_products or op.item_id in {i.pk for i in cl.limit_products.all()}:
-                if not cl.subevent_id or cl.subevent_id == op.subevent_id:
-                    ci = Checkin.objects.create(position=op, list=cl, auto_checked_in=True, type=Checkin.TYPE_ENTRY)
-                    checkin_created.send(event, checkin=ci)
-
-
 @receiver(periodic_task, dispatch_uid="autocheckout_exit_all")
 @scopes_disabled()
 def process_exit_all(sender, **kwargs):
@@ -1182,10 +1165,11 @@ def process_exit_all(sender, **kwargs):
         positions = cl.positions_inside_query(ignore_status=True, at_time=cl.exit_all_at)
         for p in positions:
             with scope(organizer=cl.event.organizer):
-                ci = Checkin.objects.create(
+                ci, created = Checkin.objects.get_or_create(
                     position=p, list=cl, auto_checked_in=True, type=Checkin.TYPE_EXIT, datetime=cl.exit_all_at
                 )
-                checkin_created.send(cl.event, checkin=ci)
+                if created:
+                    checkin_created.send(cl.event, checkin=ci)
         d = cl.exit_all_at.astimezone(cl.event.timezone)
         if cl.event.settings.get(f'autocheckin_dst_hack_{cl.pk}'):  # move time back if yesterday was DST switch
             d -= timedelta(hours=1)

src/pretix/base/services/cross_selling.py

@@ -0,0 +1,234 @@
+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2020-2021 rami.io GmbH and contributors
+#
+# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
+# Public License as published by the Free Software Foundation in version 3 of the License.
+#
+# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
+# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
+# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
+# this file, see <https://pretix.eu/about/en/license>.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
+# <https://www.gnu.org/licenses/>.
+#
+
+from collections import defaultdict
+from decimal import Decimal
+from itertools import groupby
+from math import inf
+from typing import List
+
+from django.utils.functional import cached_property
+
+from pretix.base.models import CartPosition, ItemCategory, SalesChannel
+from pretix.presale.views.event import get_grouped_items
+
+
+class DummyCategory:
+    """
+    Used to create fake category objects for displaying the same cross-selling category multiple times,
+    once for each subevent
+    """
+
+    def __init__(self, category: ItemCategory, subevent):
+        self.id = category.id
+        self.name = str(category.name)
+        self.subevent_name = str(subevent)
+        self.description = category.description
+
+
+class CrossSellingService:
+    def __init__(self, event, sales_channel: SalesChannel, cartpositions: List[CartPosition], customer):
+        self.event = event
+        self.sales_channel = sales_channel
+        self.cartpositions = cartpositions
+        self.customer = customer
+
+    def get_data(self):
+        if self.event.has_subevents:
+            subevents = set(pos.subevent for pos in self.cartpositions)
+            result = (
+                (DummyCategory(category, subevent),
+                 self._prepare_items(subevent, items_qs, discount_info),
+                 f'subevent_{subevent.pk}_')
+                for subevent in subevents
+                for (category, items_qs, discount_info) in self._applicable_categories(subevent.pk)
+            )
+        else:
+            result = (
+                (category,
+                 self._prepare_items(None, items_qs, discount_info),
+                 '')
+                for (category, items_qs, discount_info) in self._applicable_categories(0)
+            )
+        result = [(category, items, form_prefix) for (category, items, form_prefix) in result if len(items) > 0]
+        for category, items, form_prefix in result:
+            category.category_has_discount = any(item.original_price or (
+                item.has_variations and any(var.original_price for var in item.available_variations)
+            ) for item in items)
+        return result
+
+    def _applicable_categories(self, subevent_id):
+        return [
+            (c, products_qs, discount_info) for (c, products_qs, discount_info) in
+            (
+                (c, *self._get_visible_items_for_category(subevent_id, c))
+                for c in self.event.categories.filter(cross_selling_mode__isnull=False).prefetch_related('items')
+            )
+            if products_qs is not None
+        ]
+
+    def _get_visible_items_for_category(self, filter_subevent_id, category: ItemCategory):
+        """
+        If this category should be visible in the cross-selling step for a given cart and sales_channel, this method
+        returns a queryset of the items that should be displayed, as well as a dict giving additional information on them.
+
+        :returns: (QuerySet<Item>, dict<(subevent_id, item_pk): (max_count, discount_rule)>)
+            max_count is `inf` if the item should not be limited
+            discount_rule is None if the item will not be discounted
+        """
+        if category.cross_selling_mode is None:
+            return None, {}
+        if category.cross_selling_condition == 'always':
+            return category.items.all(), {}
+        if category.cross_selling_condition == 'products':
+            match = set(match.pk for match in category.cross_selling_match_products.only('pk'))  # TODO prefetch this
+            return (category.items.all(), {}) if any(pos.item.pk in match for pos in self.cartpositions) else (None, {})
+        if category.cross_selling_condition == 'discounts':
+            my_item_pks = [item.id for item in category.items.all()]
+            potential_discount_items = {
+                item.pk: (max_count, discount_rule)
+                for subevent_id, item, max_count, discount_rule in self._potential_discounts_by_subevent_and_item_for_current_cart
+                if max_count > 0 and item.pk in my_item_pks and item.is_available() and (subevent_id == filter_subevent_id or subevent_id is None)
+            }
+            return category.items.filter(pk__in=potential_discount_items), potential_discount_items
+
+    @cached_property
+    def _potential_discounts_by_subevent_and_item_for_current_cart(self):
+        potential_discounts_by_cartpos = defaultdict(list)
+
+        from ..services.pricing import apply_discounts
+        self._discounted_prices = apply_discounts(
+            self.event,
+            self.sales_channel,
+            [
+                (cp.item_id, cp.subevent_id, cp.line_price_gross, bool(cp.addon_to), cp.is_bundled,
+                 cp.listed_price - cp.price_after_voucher)
+                for cp in self.cartpositions
+            ],
+            collect_potential_discounts=potential_discounts_by_cartpos
+        )
+
+        # flatten potential_discounts_by_cartpos (a dict of lists of potential discounts) into a set of potential discounts
+        # (which is technically stored as a dict, but we use it as an OrderedSet here)
+        potential_discount_set = dict.fromkeys(
+            info for lst in potential_discounts_by_cartpos.values() for info in lst)
+
+        # sum up the max_counts and pass them on (also pass on the discount_rules so we can calculate actual discounted prices later):
+        # group by benefit product
+        # - max_count for product: sum up max_counts
+        # - discount_rule for product: take first discount_rule
+
+        def discount_info(subevent_id, item, infos_for_item):
+            infos_for_item = list(infos_for_item)
+            return (
+                subevent_id,
+                item,
+                sum(max_count for (subevent_id, item, discount_rule, max_count, i) in infos_for_item),
+                next(discount_rule for (subevent_id, item, discount_rule, max_count, i) in infos_for_item),
+            )
+
+        return [
+            discount_info(subevent_id, item, infos_for_item) for (subevent_id, item), infos_for_item in
+            groupby(
+                sorted(
+                    (
+                        (subevent_id, item, discount_rule, max_count, i)
+                        for (discount_rule, max_count, i, subevent_id) in potential_discount_set.keys()
+                        for item in discount_rule.benefit_limit_products.all()
+                    ),
+                    key=lambda tup: (tup[0], tup[1].pk)
+                ),
+                lambda tup: (tup[0], tup[1]))
+        ]
+
+    def _prepare_items(self, subevent, items_qs, discount_info):
+        items, _btn = get_grouped_items(
+            self.event,
+            subevent=subevent,
+            voucher=None,
+            channel=self.sales_channel,
+            base_qs=items_qs,
+            allow_addons=False,
+            allow_cross_sell=True,
+            memberships=(
+                self.customer.usable_memberships(
+                    for_event=subevent or self.event,
+                    testmode=self.event.testmode
+                )
+                if self.customer else None
+            ),
+        )
+        new_items = list()
+        for item in items:
+            max_count = inf
+            if item.pk in discount_info:
+                (max_count, discount_rule) = discount_info[item.pk]
+
+                # only benefit_only_apply_to_cheapest_n_matches discounted items have a max_count, all others get 'inf'
+                if not max_count:
+                    max_count = inf
+
+                # calculate discounted price
+                if discount_rule and discount_rule.benefit_discount_matching_percent > 0:
+                    if not item.has_variations:
+                        item.original_price = item.original_price or item.display_price
+                        previous_price = item.display_price
+                        new_price = (
+                            previous_price * (
+                                (Decimal('100.00') - discount_rule.benefit_discount_matching_percent) / Decimal('100.00'))
+                        )
+                        item.display_price = new_price
+                    else:
+                        # discounts always match "whole" items, not specific variations -> we apply the discount to all
+                        # available variations of the item
+                        for var in item.available_variations:
+                            var.original_price = var.original_price or var.display_price
+                            previous_price = var.display_price
+                            new_price = (
+                                previous_price * (
+                                    (Decimal('100.00') - discount_rule.benefit_discount_matching_percent) / Decimal('100.00'))
+                            )
+                            var.display_price = new_price
+
+            if not item.has_variations:
+                # reduce order_max by number of items already in cart (prevent recommending a product the user can't add anyway)
+                item.order_max = min(
+                    item.order_max - sum(1 for pos in self.cartpositions if pos.item_id == item.pk),
+                    max_count
+                )
+                if item.order_max > 0:
+                    new_items.append(item)
+            else:
+                new_vars = list()
+                for var in item.available_variations:
+                    # reduce order_max by number of items already in cart (prevent recommending a product the user can't add anyway)
+                    var.order_max = min(
+                        var.order_max - sum(1 for pos in self.cartpositions if pos.item_id == item.pk and pos.variation_id == var.pk),
+                        max_count
+                    )
+                    if var.order_max > 0:
+                        new_vars.append(var)
+                if len(new_vars):
+                    item.available_variations = new_vars
+                    new_items.append(item)
+
+        return new_items

src/pretix/base/services/mail.py

@@ -76,7 +76,7 @@ from pretix.base.services.tasks import TransactionAwareTask
 from pretix.base.services.tickets import get_tickets_for_order
 from pretix.base.signals import email_filter, global_email_filter
 from pretix.celery_app import app
-from pretix.helpers.format import format_map
+from pretix.helpers.format import SafeFormatter, format_map
 from pretix.helpers.hierarkey import clean_filename
 from pretix.multidomain.urlreverse import build_absolute_uri
 from pretix.presale.ical import get_private_icals
@@ -301,7 +301,7 @@ def mail(email: Union[str, Sequence[str]], subject: str, template: Union[str, La
                         order.event, 'presale:event.order.open', kwargs={
                             'order': order.code,
                             'secret': order.secret,
-                            'hash': order.email_confirm_hash()
+                            'hash': order.email_confirm_secret()
                         }
                     )
                 )
@@ -311,11 +311,17 @@ def mail(email: Union[str, Sequence[str]], subject: str, template: Union[str, La
             try:
                 if plain_text_only:
                     body_html = None
+                elif 'context' in inspect.signature(renderer.render).parameters:
+                    body_html = renderer.render(content_plain, signature, raw_subject, order, position, context)
                 elif 'position' in inspect.signature(renderer.render).parameters:
+                    # Backwards compatibility
+                    warnings.warn('Email renderer called without context argument because context argument is not '
+                                  'supported.',
+                                  DeprecationWarning)
                     body_html = renderer.render(content_plain, signature, raw_subject, order, position)
                 else:
                     # Backwards compatibility
-                    warnings.warn('E-mail renderer called without position argument because position argument is not '
+                    warnings.warn('Email renderer called without position argument because position argument is not '
                                   'supported.',
                                   DeprecationWarning)
                     body_html = renderer.render(content_plain, signature, raw_subject, order)
@@ -323,6 +329,8 @@ def mail(email: Union[str, Sequence[str]], subject: str, template: Union[str, La
                 logger.exception('Could not render HTML body')
                 body_html = None
 
+        body_plain = format_map(body_plain, context, mode=SafeFormatter.MODE_RICH_TO_PLAIN)
+
         send_task = mail_send_task.si(
             to=[email] if isinstance(email, str) else list(email),
             cc=cc,
@@ -655,7 +663,7 @@ def render_mail(template, context):
     if isinstance(template, LazyI18nString):
         body = str(template)
         if context:
-            body = format_map(body, context)
+            body = format_map(body, context, mode=SafeFormatter.MODE_IGNORE_RICH)
     else:
         tpl = get_template(template)
         body = tpl.render(context)

src/pretix/base/services/placeholders.py

@@ -26,6 +26,7 @@ from decimal import Decimal
 
 from django.dispatch import receiver
 from django.utils.formats import date_format
+from django.utils.html import escape
 from django.utils.timezone import now
 from django.utils.translation import gettext_lazy as _
 
@@ -39,7 +40,8 @@ from pretix.base.settings import PERSON_NAME_SCHEMES, get_name_parts_localized
 from pretix.base.signals import (
     register_mail_placeholders, register_text_placeholders,
 )
-from pretix.helpers.format import SafeFormatter
+from pretix.base.templatetags.rich_text import markdown_compile_email
+from pretix.helpers.format import PlainHtmlAlternativeString, SafeFormatter
 
 logger = logging.getLogger('pretix.base.services.placeholders')
 
@@ -107,6 +109,91 @@ class SimpleFunctionalTextPlaceholder(BaseTextPlaceholder):
             return self._sample
 
 
+class BaseRichTextPlaceholder(BaseTextPlaceholder):
+    """
+    This is the base class for all placeholders which can render either to plain text
+    or to a rich HTML element.
+    """
+
+    def __init__(self, identifier, args):
+        self._identifier = identifier
+        self._args = args
+
+    @property
+    def identifier(self):
+        return self._identifier
+
+    @property
+    def required_context(self):
+        return self._args
+
+    @property
+    def is_block(self):
+        return False
+
+    def render(self, context):
+        return PlainHtmlAlternativeString(
+            self.render_plain(**{k: context[k] for k in self._args}),
+            self.render_html(**{k: context[k] for k in self._args}),
+            self.is_block,
+        )
+
+    def render_html(self, **kwargs):
+        """
+        HTML rendering of the placeholder. Should return "safe" HTML, i.e. everything needs to be
+        escaped.
+        """
+        raise NotImplementedError
+
+    def render_plain(self, **kwargs):
+        """
+        Plain text rendering of the placeholder.
+        """
+        raise NotImplementedError
+
+    def render_sample(self, event):
+        return PlainHtmlAlternativeString(
+            self.render_sample_plain(event=event),
+            self.render_sample_html(event=event),
+            self.is_block,
+        )
+
+    def render_sample_html(self, event):
+        raise NotImplementedError
+
+    def render_sample_plain(self, event):
+        raise NotImplementedError
+
+
+class SimpleButtonPlaceholder(BaseRichTextPlaceholder):
+    def __init__(self, identifier, args, url_func, text_func, sample_url_func, sample_text_func):
+        super().__init__(identifier, args)
+        self._url_func = url_func
+        self._text_func = text_func
+        self._sample_url_func = sample_url_func
+        self._sample_text_func = sample_text_func
+
+    def render_html(self, **context):
+        text = self._text_func(**{k: context[k] for k in self._args})
+        url = self._url_func(**{k: context[k] for k in self._args})
+        return f'<a href="{url}" class="button">{escape(text)}</a>'
+
+    def render_plain(self, **context):
+        text = self._text_func(**{k: context[k] for k in self._args})
+        url = self._url_func(**{k: context[k] for k in self._args})
+        return f'{text}: {url}'
+
+    def render_sample_html(self, event):
+        text = self._sample_text_func(event)
+        url = self._sample_url_func(event)
+        return f'<a href="{url}" class="button">{escape(text)}</a>'
+
+    def render_sample_plain(self, event):
+        text = self._sample_text_func(event)
+        url = self._sample_url_func(event)
+        return f'{text}: {url}'
+
+
 class PlaceholderContext(SafeFormatter):
     """
     Holds the contextual arguments and corresponding list of available placeholders for formatting
@@ -209,13 +296,24 @@ def get_best_name(position_or_address, parts=False):
 def base_placeholders(sender, **kwargs):
     from pretix.multidomain.urlreverse import build_absolute_uri
 
+    def _event_sample(event):
+        if event.has_subevents:
+            se = event.subevents.first()
+            if se:
+                return se.name
+        return event.name
+
     ph = [
         SimpleFunctionalTextPlaceholder(
             'event', ['event'], lambda event: event.name, lambda event: event.name
         ),
         SimpleFunctionalTextPlaceholder(
             'event', ['event_or_subevent'], lambda event_or_subevent: event_or_subevent.name,
-            lambda event_or_subevent: event_or_subevent.name
+            _event_sample,
+        ),
+        SimpleFunctionalTextPlaceholder(
+            'event_series_name', ['event', 'event_or_subevent'], lambda event, event_or_subevent: event.name,
+            lambda event: event.name
         ),
         SimpleFunctionalTextPlaceholder(
             'event_slug', ['event'], lambda event: event.slug, lambda event: event.slug
@@ -262,7 +360,7 @@ def base_placeholders(sender, **kwargs):
                 'presale:event.order.open', kwargs={
                     'order': order.code,
                     'secret': order.secret,
-                    'hash': order.email_confirm_hash()
+                    'hash': order.email_confirm_secret()
                 }
             ), lambda event: build_absolute_uri(
                 event,
@@ -273,6 +371,27 @@ def base_placeholders(sender, **kwargs):
                 }
             ),
         ),
+        SimpleButtonPlaceholder(
+            'url_button', ['order', 'event'],
+            url_func=lambda order, event: build_absolute_uri(
+                event,
+                'presale:event.order.open', kwargs={
+                    'order': order.code,
+                    'secret': order.secret,
+                    'hash': order.email_confirm_secret()
+                }
+            ),
+            text_func=lambda order, event: _("View order details"),
+            sample_url_func=lambda event: build_absolute_uri(
+                event,
+                'presale:event.order.open', kwargs={
+                    'order': 'F8VVL',
+                    'secret': '6zzjnumtsx136ddy',
+                    'hash': '98kusd8ofsj8dnkd'
+                }
+            ),
+            sample_text_func=lambda event: _("View order details"),
+        ),
         SimpleFunctionalTextPlaceholder(
             'url_info_change', ['order', 'event'], lambda order, event: build_absolute_uri(
                 event,
@@ -337,6 +456,27 @@ def base_placeholders(sender, **kwargs):
                 }
             ),
         ),
+        SimpleButtonPlaceholder(
+            'url_button', ['event', 'position'],
+            url_func=lambda event, position: build_absolute_uri(
+                event,
+                'presale:event.order.position', kwargs={
+                    'order': position.order.code,
+                    'secret': position.web_secret,
+                    'position': position.positionid
+                }
+            ),
+            text_func=lambda event, position: _("View registration details"),
+            sample_url_func=lambda event: build_absolute_uri(
+                event,
+                'presale:event.order.position', kwargs={
+                    'order': 'F8VVL',
+                    'secret': '6zzjnumtsx136ddy',
+                    'position': '123'
+                }
+            ),
+            sample_text_func=lambda event: _("View registration details"),
+        ),
         SimpleFunctionalTextPlaceholder(
             'url_info_change', ['position', 'event'], lambda position, event: build_absolute_uri(
                 event,
@@ -443,7 +583,7 @@ def base_placeholders(sender, **kwargs):
                         'organizer': event.organizer.slug,
                         'order': order.code,
                         'secret': order.secret,
-                        'hash': order.email_confirm_hash(),
+                        'hash': order.email_confirm_secret(),
                     }),
                 )
                 for order in orders
@@ -592,8 +732,8 @@ def base_placeholders(sender, **kwargs):
 
 
 class FormPlaceholderMixin:
-    def _set_field_placeholders(self, fn, base_parameters):
-        placeholders = get_available_placeholders(self.event, base_parameters)
+    def _set_field_placeholders(self, fn, base_parameters, rich=False):
+        placeholders = get_available_placeholders(self.event, base_parameters, rich=rich)
         ht = format_placeholders_help_text(placeholders, self.event)
         if self.fields[fn].help_text:
             self.fields[fn].help_text += ' ' + str(ht)
@@ -604,7 +744,7 @@ class FormPlaceholderMixin:
         )
 
 
-def get_available_placeholders(event, base_parameters):
+def get_available_placeholders(event, base_parameters, rich=False):
     if 'order' in base_parameters:
         base_parameters.append('invoice_address')
         base_parameters.append('position_or_address')
@@ -613,6 +753,35 @@ def get_available_placeholders(event, base_parameters):
         if not isinstance(val, (list, tuple)):
             val = [val]
         for v in val:
+            if isinstance(v, BaseRichTextPlaceholder) and not rich:
+                continue
             if all(rp in base_parameters for rp in v.required_context):
                 params[v.identifier] = v
     return params
+
+
+def get_sample_context(event, context_parameters, rich=True):
+    context_dict = {}
+    lbl = _('This value will be replaced based on dynamic parameters.')
+    for k, v in get_available_placeholders(event, context_parameters, rich=rich).items():
+        sample = v.render_sample(event)
+        if isinstance(sample, PlainHtmlAlternativeString):
+            context_dict[k] = PlainHtmlAlternativeString(
+                sample.plain,
+                '<{el} class="placeholder placeholder-html" title="{title}">{html}</{el}>'.format(
+                    el='div' if sample.is_block else 'span',
+                    title=lbl,
+                    html=sample.html,
+                )
+            )
+        elif str(sample).strip().startswith('* ') or str(sample).startswith('  '):
+            context_dict[k] = '<div class="placeholder" title="{}">{}</div>'.format(
+                lbl,
+                markdown_compile_email(str(sample))
+            )
+        else:
+            context_dict[k] = '<span class="placeholder" title="{}">{}</span>'.format(
+                lbl,
+                escape(sample)
+            )
+    return context_dict

src/pretix/base/services/pricing.py

@@ -20,8 +20,9 @@
 # <https://www.gnu.org/licenses/>.
 #
 import re
+from collections import defaultdict
 from decimal import Decimal
-from typing import List, Optional, Tuple
+from typing import List, Optional, Tuple, Union
 
 from django import forms
 from django.db.models import Q
@@ -31,6 +32,7 @@ from pretix.base.models import (
     AbstractPosition, InvoiceAddress, Item, ItemAddOn, ItemVariation,
     SalesChannel, Voucher,
 )
+from pretix.base.models.discount import Discount, PositionInfo
 from pretix.base.models.event import Event, SubEvent
 from pretix.base.models.tax import TAXED_ZERO, TaxedPrice, TaxRule
 from pretix.base.timemachine import time_machine_now
@@ -155,14 +157,22 @@ def get_line_price(price_after_voucher: Decimal, custom_price_input: Decimal, cu
     return price
 
 
-def apply_discounts(event: Event, sales_channel: str,
-                    positions: List[Tuple[int, Optional[int], Decimal, bool, bool]]) -> List[Decimal]:
+def apply_discounts(event: Event, sales_channel: Union[str, SalesChannel],
+                    positions: List[Tuple[int, Optional[int], Decimal, bool, bool, Decimal]],
+                    collect_potential_discounts: Optional[defaultdict]=None) -> List[Tuple[Decimal, Optional[Discount]]]:
     """
     Applies any dynamic discounts to a cart
 
     :param event: Event the cart belongs to
     :param sales_channel: Sales channel the cart was created with
     :param positions: Tuple of the form ``(item_id, subevent_id, line_price_gross, is_addon_to, is_bundled, voucher_discount)``
+    :param collect_potential_discounts: If a `defaultdict(list)` is supplied, all discounts that could be applied to the cart
+    based on the "consumed" items, but lack matching "benefitting" items will be collected therein.
+    The dict will contain a mapping from index in the `positions` list of the item that could be consumed, to a list
+    of tuples describing the discounts that could be applied in the form `(discount, max_count, grouping_id)`.
+    `max_count` is either the maximum number of benefitting items that the discount would apply to, or `inf` if that number
+    is not limited. The `grouping_id` can be used to distinguish several occurrences of the same discount.
+
     :return: A list of ``(new_gross_price, discount)`` tuples in the same order as the input
     """
     if isinstance(sales_channel, SalesChannel):
@@ -177,10 +187,10 @@ def apply_discounts(event: Event, sales_channel: str,
     ).prefetch_related('condition_limit_products', 'benefit_limit_products').order_by('position', 'pk')
     for discount in discount_qs:
         result = discount.apply({
-            idx: (item_id, subevent_id, line_price_gross, is_addon_to, voucher_discount)
+            idx: PositionInfo(item_id, subevent_id, line_price_gross, is_addon_to, voucher_discount)
             for idx, (item_id, subevent_id, line_price_gross, is_addon_to, is_bundled, voucher_discount) in enumerate(positions)
             if not is_bundled and idx not in new_prices
-        })
+        }, collect_potential_discounts)
         for k in result.keys():
             result[k] = (result[k], discount)
         new_prices.update(result)

src/pretix/base/services/vouchers.py

@@ -53,7 +53,7 @@ def vouchers_send(event: Event, vouchers: list, subject: str, message: str, reci
                     v.tag = r.get('tag')
                 if v.comment:
                     v.comment += '\n\n'
-                v.comment = gettext('The voucher has been sent to {recipient}.').format(recipient=r['email'])
+                v.comment += gettext('The voucher has been sent to {recipient}.').format(recipient=r['email'])
                 logs.append(v.log_action(
                     'pretix.voucher.sent',
                     user=user,

src/pretix/base/settings.py

@@ -550,7 +550,7 @@ DEFAULTS = {
         'serializer_class': serializers.BooleanField,
         'type': bool,
         'form_kwargs': dict(
-            label=_("Require a business addresses"),
+            label=_("Require a business address"),
             help_text=_('This will require users to enter a company name.'),
             widget=forms.CheckboxInput(attrs={'data-checkbox-dependency': '#id_invoice_address_required'}),
         )
@@ -571,7 +571,7 @@ DEFAULTS = {
         'form_class': I18nFormField,
         'serializer_class': I18nField,
         'form_kwargs': dict(
-            label=_("Custom recipient field"),
+            label=_("Custom recipient field label"),
             widget=I18nTextInput,
             help_text=_("If you want to add a custom text field, e.g. for a country-specific registration number, to "
                         "your invoice address form, please fill in the label here. This label will both be used for "
@@ -580,6 +580,18 @@ DEFAULTS = {
                         "The field will not be required.")
         )
     },
+    'invoice_address_custom_field_helptext': {
+        'default': '',
+        'type': LazyI18nString,
+        'form_class': I18nFormField,
+        'serializer_class': I18nField,
+        'form_kwargs': dict(
+            label=_("Custom recipient field help text"),
+            widget=I18nTextInput,
+            help_text=_("If you use the custom recipient field, you can specify a help text which will be displayed "
+                        "underneath the field. It will not be displayed on the invoice.")
+        )
+    },
     'invoice_address_vatid': {
         'default': 'False',
         'type': bool,
@@ -1295,7 +1307,8 @@ DEFAULTS = {
         'form_kwargs': dict(
             label=_("Show event times and dates on the ticket shop"),
             help_text=_("If disabled, no date or time will be shown on the ticket shop's front page. This settings "
-                        "does however not affect the display in other locations."),
+                        "also affects a few other locations, however it should not be expected that the date of the "
+                        "event is shown nowhere to users."),
         )
     },
     'show_date_to': {

src/pretix/base/shredder.py

@@ -287,9 +287,9 @@ class PhoneNumberShredder(BaseDataShredder):
 
 
 class EmailAddressShredder(BaseDataShredder):
-    verbose_name = _('E-mails')
+    verbose_name = _('Emails')
     identifier = 'order_emails'
-    description = _('This will remove all e-mail addresses from orders and attendees, as well as logged email '
+    description = _('This will remove all email addresses from orders and attendees, as well as logged email '
                     'contents. This will also remove the association to customer accounts.')
 
     def generate_files(self) -> List[Tuple[str, str, str]]:

src/pretix/base/signals.py

@@ -367,7 +367,7 @@ validate_cart_addons = EventPluginSignal()
 Arguments: ``addons``, ``base_position``, ``iao``
 
 This signal is sent when a user tries to select a combination of addons. In contrast to
- ``validate_cart``, this is executed before the cart is actually modified. You are passed
+``validate_cart``, this is executed before the cart is actually modified. You are passed
 an argument ``addons`` containing a dict of ``(item, variation or None) → count`` tuples as well
 as the ``ItemAddOn`` object as the argument ``iao`` and the base cart position as
 ``base_position``.
@@ -838,3 +838,12 @@ is given as the first argument.
 
 The ``sender`` keyword argument will contain the organizer.
 """
+
+device_info_updated = django.dispatch.Signal()
+"""
+Arguments: ``old_device``, ``new_device``
+
+This signal is sent out each time the information for a Device is modified.
+Both the original and updated versions of the Device are included to allow
+receivers to see what has been updated.
+"""

src/pretix/base/templates/pretixbase/email/base.html

@@ -131,6 +131,9 @@
             text-align: left;
             padding: 0;
         }
+        .content table td.align-right {
+            text-align: right;
+        }
 
         a.button {
             display: inline-block;
@@ -178,6 +181,9 @@
         pre, pre code {
             white-space: pre-line;
         }
+        .text-right, .content table td.text-right {
+            text-align: right;
+        }
 
         {% if rtl %}
             body {
@@ -186,6 +192,9 @@
             .content {
                 text-align: right;
             }
+            .text-right, .content table td.text-right {
+                text-align: left;
+            }
         {% endif %}
 
         {% block addcss %}{% endblock %}

src/pretix/base/templates/pretixbase/email/order_details.html

@@ -143,7 +143,7 @@
         </tr>
     </table>
     <div class="order-button">
-        <a href="{% abseventurl event "presale:event.order.open" hash=order.email_confirm_hash order=order.code secret=order.secret %}" class="button">
+        <a href="{% abseventurl event "presale:event.order.open" hash=order.email_confirm_secret order=order.code secret=order.secret %}" class="button">
             {% trans "View order details" %}
         </a>
     </div>

src/pretix/base/templatetags/icon.py

@@ -0,0 +1,34 @@
+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2020-2021 rami.io GmbH and contributors
+#
+# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
+# Public License as published by the Free Software Foundation in version 3 of the License.
+#
+# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
+# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
+# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
+# this file, see <https://pretix.eu/about/en/license>.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
+# <https://www.gnu.org/licenses/>.
+#
+from django import template
+from django.utils.html import format_html
+
+register = template.Library()
+
+
+@register.simple_tag
+def icon(key, *args, **kwargs):
+    return format_html(
+        '<span class="fa fa-{} {}" aria-hidden="true"></span>',
+        key,
+        kwargs["class"] if "class" in kwargs else "",
+    )

src/pretix/base/templatetags/money.py

@@ -52,12 +52,12 @@ def money_filter(value: Decimal, arg='', hide_currency=False):
         # would make the numbers incorrect. If this branch executes, it's likely a bug in
         # pretix, but we won't show wrong numbers!
         if hide_currency:
-            return floatformat(value, 2)
+            return floatformat(value, "2g")
         else:
-            return '{} {}'.format(arg, floatformat(value, 2))
+            return '{} {}'.format(arg, floatformat(value, "2g"))
 
     if hide_currency:
-        return floatformat(value, places)
+        return floatformat(value, f"{places}g")
 
     locale_parts = translation.get_language().split("-", 1)
     locale = locale_parts[0]
@@ -70,7 +70,7 @@ def money_filter(value: Decimal, arg='', hide_currency=False):
     try:
         return format_currency(value, arg, locale=locale)
     except:
-        return '{} {}'.format(arg, floatformat(value, places))
+        return '{} {}'.format(arg, floatformat(value, f"{places}g"))
 
 
 @register.filter("money_numberfield")

src/pretix/base/templatetags/rich_text.py

@@ -54,7 +54,7 @@ from tlds import tld_set
 
 register = template.Library()
 
-ALLOWED_TAGS_SNIPPET = [
+ALLOWED_TAGS_SNIPPET = {
     'a',
     'abbr',
     'acronym',
@@ -68,8 +68,8 @@ ALLOWED_TAGS_SNIPPET = [
     'strike',
     's',
     # Update doc/user/markdown.rst if you change this!
-]
-ALLOWED_TAGS = ALLOWED_TAGS_SNIPPET + [
+}
+ALLOWED_TAGS = ALLOWED_TAGS_SNIPPET | {
     'blockquote',
     'li',
     'ol',
@@ -91,7 +91,7 @@ ALLOWED_TAGS = ALLOWED_TAGS_SNIPPET + [
     'h6',
     'pre',
     # Update doc/user/markdown.rst if you change this!
-]
+}
 
 ALLOWED_ATTRIBUTES = {
     'a': ['href', 'title', 'class'],
@@ -106,7 +106,7 @@ ALLOWED_ATTRIBUTES = {
     # Update doc/user/markdown.rst if you change this!
 }
 
-ALLOWED_PROTOCOLS = ['http', 'https', 'mailto', 'tel']
+ALLOWED_PROTOCOLS = {'http', 'https', 'mailto', 'tel'}
 
 URL_RE = SimpleLazyObject(lambda: build_url_re(tlds=sorted(tld_set, key=len, reverse=True)))
 
@@ -211,9 +211,9 @@ class CleanPostprocessor(Postprocessor):
     def run(self, text):
         return bleach.clean(
             text,
-            tags=self.tags,
+            tags=set(self.tags),
             attributes=self.attributes,
-            protocols=self.protocols,
+            protocols=set(self.protocols),
             strip=self.strip
         )
 
@@ -305,10 +305,11 @@ def markdown_compile_email(source, allowed_tags=ALLOWED_TAGS, allowed_attributes
         source,
         extensions=[
             'markdown.extensions.sane_lists',
+            'markdown.extensions.tables',
             EmailNl2BrExtension(),
             LinkifyAndCleanExtension(
                 linker,
-                tags=allowed_tags,
+                tags=set(allowed_tags),
                 attributes=allowed_attributes,
                 protocols=ALLOWED_PROTOCOLS,
                 strip=False,

src/pretix/base/templatetags/textbubble.py

@@ -0,0 +1,42 @@
+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020 Raphael Michel and contributors
+# Copyright (C) 2020-2021 rami.io GmbH and contributors
+#
+# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
+# Public License as published by the Free Software Foundation in version 3 of the License.
+#
+# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
+# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
+# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
+# this file, see <https://pretix.eu/about/en/license>.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
+# <https://www.gnu.org/licenses/>.
+#
+from django import template
+from django.utils.html import format_html, mark_safe
+
+register = template.Library()
+
+
+@register.simple_tag
+def textbubble(type, *args, **kwargs):
+    return format_html(
+        '<span class="textbubble-{}">{}',
+        type or "info",
+        "" if "icon" not in kwargs else format_html(
+            '<i class="fa fa-{}" aria-hidden="true"></i> ',
+            kwargs["icon"]
+        )
+    )
+
+
+@register.simple_tag
+def endtextbubble():
+    return mark_safe('</span>')