Merge branch 'master' into order-change-nplus1

doc/api/resources/orders.rst

@@ -864,6 +864,9 @@ Generating new secrets
 
    Triggers generation of new ``secret`` and ``web_secret`` attributes for both the order and all order positions.
 
+   Ticket secrets of order positions that have been used to issue a gift card can not
+   be changed. Only the link (``web_secret``) will be changed in this case.
+
    **Example request**:
 
    .. sourcecode:: http
@@ -895,6 +898,9 @@ Generating new secrets
 
    Triggers generation of a new ``secret`` and ``web_secret`` attribute for a single order position.
 
+   Ticket secrets of order positions that have been used to issue a gift card can not
+   be changed. Only the link (``web_secret``) will be changed in this case.
+
    **Example request**:
 
    .. sourcecode:: http

src/pretix/base/migrations/0302_fixup_eventmetaproperties.py

@@ -0,0 +1,91 @@
+# Generated by Django 5.2.12 on 2026-04-28 11:34
+import logging
+
+from django.db import IntegrityError, migrations, transaction
+from django.db.models import Count, F
+
+logger = logging.getLogger(__name__)
+
+
+def fix_cross_organizer_eventmetavalues(apps, schema_editor):
+    EventMetaProperty = apps.get_model("pretixbase", "EventMetaProperty")
+    EventMetaValue = apps.get_model("pretixbase", "EventMetaValue")
+
+    cross_org_values = EventMetaValue.objects.filter(
+        event__organizer__pk__ne=F('property__organizer__pk')
+    ).order_by('event__organizer__slug', 'event__slug')
+    for emv in cross_org_values:
+        logger.warning("%s", f"Fixing cross-organizer EventMetaValue: {emv.event.organizer.slug}/{emv.event.slug}")
+        logger.warning("  %s", f"{emv.property.name}({emv.property.id}@{emv.property.organizer.slug}) = {repr(emv.value)}")
+        try:
+            emv.property = emv.event.organizer.meta_properties.get(name=emv.property.name)
+            if EventMetaValue.objects.filter(event=emv.event, property=emv.property).exists():
+                correct = EventMetaValue.objects.get(event=emv.event, property=emv.property)
+                if correct.value != emv.value:
+                    logger.warning("  %s", f"WARN: conflicting EventMetaValue with property in correct organizer already exists, deleting the cross-organizer one")
+                else:
+                    logger.warning("  %s", f"OK: same-value EventMetaValue with property in correct organizer already exists, deleting the cross-organizer one")
+                logger.warning("  %s", f"keeping: {correct.property.name}({correct.property.id}@{correct.property.organizer.slug}) = {repr(correct.value)}")
+                emv.delete()
+            else:
+                logger.warning("  %s", f"OK: found existing EventMetaProperty in {emv.event.organizer.slug}, updating reference")
+                logger.warning("  %s", f"after: {emv.property.name}({emv.property.id}@{emv.property.organizer.slug}) = {repr(emv.value)}")
+                emv.save(update_fields=["property"])
+        except EventMetaProperty.DoesNotExist:
+            meta_prop = emv.property
+            meta_prop.pk = None
+            meta_prop.organizer = emv.event.organizer
+            meta_prop.filter_public = False
+            meta_prop.save(force_insert=True)
+            logger.warning("  %s", f"WARN: found no matching EventMetaProperty, creating")
+            logger.warning("  %s", f"after: {emv.property.name}({emv.property.id}@{emv.property.organizer.slug}) = {repr(emv.value)}")
+            emv.save(update_fields=["property"])
+
+
+def make_eventmetaproperties_unique(apps, schema_editor):
+    EventMetaProperty = apps.get_model("pretixbase", "EventMetaProperty")
+    EventMetaValue = apps.get_model("pretixbase", "EventMetaValue")
+
+    duplicates = EventMetaProperty.objects.values('organizer', 'organizer__slug', 'name').annotate(count=Count('id')).filter(count__gt=1)
+    for dup in duplicates:
+        logger.warning("%s", f"Fixup duplicate property {dup['organizer__slug']} {dup['name']}")
+        props = list(EventMetaProperty.objects.filter(organizer=dup['organizer'], name=dup['name']))
+
+        target = props[0]
+        invalid = props[1:]
+
+        try:
+            with transaction.atomic():
+                affected = EventMetaValue.objects.filter(
+                    event__organizer=dup['organizer'], property__in=invalid
+                ).update(
+                    property=target
+                )
+                logger.warning("%s", f"  Switching {affected} value(s) over to {target.name}({target.id}@{target.organizer.slug})")
+
+        except IntegrityError as e:
+            logger.warning("%s", f"  Failed to switch all value(s) over to {target.name}({target.id}@{target.organizer.slug})")
+            logger.warning("%s", f"  {e}")
+            for prop in invalid:
+                newname = f'{prop.name}_DUPLICATE_{prop.id}'
+                logger.warning("%s", f"  Renaming {prop.name}({prop.id}@{prop.organizer.slug}) to {newname}({prop.id}@{prop.organizer.slug})")
+                prop.name = newname
+                prop.filter_public = False
+                prop.save()
+
+        else:
+            for prop in invalid:
+                logger.warning("%s", f"  Deleting {prop.name}({prop.id}@{prop.organizer.slug})")
+                prop.delete()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretixbase", "0301_reusablemedium_remove_orderposition"),
+    ]
+
+    operations = [
+        migrations.RunPython(fix_cross_organizer_eventmetavalues, migrations.RunPython.noop),
+        migrations.RunPython(make_eventmetaproperties_unique, migrations.RunPython.noop),
+    ]

src/pretix/base/migrations/0303_alter_eventmetaproperty_unique_together.py

@@ -0,0 +1,17 @@
+# Generated by Django 5.2.12 on 2026-04-28 11:34
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretixbase", "0302_fixup_eventmetaproperties"),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name="eventmetaproperty",
+            unique_together={("organizer", "name")},
+        ),
+    ]

src/pretix/base/models/event.py

@@ -1851,6 +1851,7 @@ class EventMetaProperty(LoggedModel):
 
     class Meta:
         ordering = ("position", "name",)
+        unique_together = ('organizer', 'name')
 
     @property
     def choice_keys(self):

src/pretix/base/models/items.py

@@ -885,26 +885,6 @@ class Item(LoggedModel):
             return False
         return True
 
-    def unavailability_reason(self, now_dt: datetime=None, has_voucher=False, subevent=None) -> Optional[str]:
-        now_dt = now_dt or time_machine_now()
-        subevent_item = subevent and subevent.item_overrides.get(self.pk)
-        if not self.active:
-            return 'active'
-        elif self.available_from and self.available_from > now_dt:
-            return 'available_from'
-        elif self.available_until and self.available_until < now_dt:
-            return 'available_until'
-        elif (self.require_voucher or self.hide_without_voucher) and not has_voucher:
-            return 'require_voucher'
-        elif subevent_item and subevent_item.available_from and subevent_item.available_from > now_dt:
-            return 'available_from'
-        elif subevent_item and subevent_item.available_until and subevent_item.available_until < now_dt:
-            return 'available_until'
-        elif self.hidden_if_item_available and self._dependency_available:
-            return 'hidden_if_item_available'
-        else:
-            return None
-
     def _get_quotas(self, ignored_quotas=None, subevent=None):
         check_quotas = set(getattr(
             self, '_subevent_quotas',  # Utilize cache in product list
@@ -1413,22 +1393,6 @@ class ItemVariation(models.Model):
             return False
         return True
 
-    def unavailability_reason(self, now_dt: datetime=None, has_voucher=False, subevent=None) -> Optional[str]:
-        now_dt = now_dt or time_machine_now()
-        subevent_var = subevent and subevent.var_overrides.get(self.pk)
-        if not self.active:
-            return 'active'
-        elif self.available_from and self.available_from > now_dt:
-            return 'available_from'
-        elif self.available_until and self.available_until < now_dt:
-            return 'available_until'
-        elif subevent_var and subevent_var.available_from and subevent_var.available_from > now_dt:
-            return 'available_from'
-        elif subevent_var and subevent_var.available_until and subevent_var.available_until < now_dt:
-            return 'available_until'
-        else:
-            return None
-
     @property
     def meta_data(self):
         data = self.item.meta_data

src/pretix/base/payment.py

@@ -936,7 +936,7 @@ class BasePaymentProvider:
         """
         Will be called if the *event administrator* views the details of a payment.
 
-        It should return HTML code containing information regarding the current payment
+        It should return a SafeString containing HTML code, with information regarding the current payment
         status and, if applicable, next steps.
 
         The default implementation returns an empty string.
@@ -961,7 +961,7 @@ class BasePaymentProvider:
         """
         Will be called if the *event administrator* views the details of a refund.
 
-        It should return HTML code containing information regarding the current refund
+        It should return a SafeString containing HTML code, with information regarding the current refund
         status and, if applicable, next steps.
 
         The default implementation returns an empty string.

src/pretix/base/secrets.py

@@ -245,6 +245,9 @@ def recv_classic(sender, **kwargs):
 
 
 def assign_ticket_secret(event, position, force_invalidate_if_revokation_list_used=False, force_invalidate=False, save=True):
+    if position.pk and position.issued_gift_cards.exists():
+        return
+
     gen = event.ticket_secret_generator
     if gen.use_revocation_list and force_invalidate_if_revokation_list_used:
         force_invalidate = True

src/pretix/base/services/cross_selling.py

@@ -29,7 +29,7 @@ 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
+from pretix.presale.productlist import prepare_item_list_for_shop
 
 
 class DummyCategory:
@@ -162,7 +162,7 @@ class CrossSellingService:
         ]
 
     def _prepare_items(self, subevent, items_qs, discount_info):
-        items, _btn = get_grouped_items(
+        items, _btn = prepare_item_list_for_shop(
             self.event,
             subevent=subevent,
             voucher=None,

src/pretix/base/services/orders.py

@@ -110,6 +110,7 @@ from pretix.celery_app import app
 from pretix.helpers import OF_SELF
 from pretix.helpers.models import modelcopy
 from pretix.helpers.periodic import minimum_interval
+from pretix.presale.productlist import prepare_item_list_for_shop
 from pretix.testutils.middleware import debugflags_var
 
 
@@ -1599,6 +1600,7 @@ class OrderChangeManager:
         'seat_forbidden': gettext_lazy('The selected product does not allow to select a seat.'),
         'tax_rule_country_blocked': gettext_lazy('The selected country is blocked by your tax rule.'),
         'gift_card_change': gettext_lazy('You cannot change the price of a position that has been used to issue a gift card.'),
+        'gift_card_secret': gettext_lazy('You cannot change the ticket secret of a position that has been used to issue a gift card.'),
         'max_items_per_product': ngettext_lazy(
             "You cannot select more than %(max)s item of the product %(product)s.",
             "You cannot select more than %(max)s items of the product %(product)s.",
@@ -1756,6 +1758,9 @@ class OrderChangeManager:
         self._operations.append(self.RegenerateSecretOperation(position))
 
     def change_ticket_secret(self, position: OrderPosition, new_secret: str):
+        if position.issued_gift_cards.exists():
+            raise OrderError(self.error_messages['gift_card_secret'])
+
         self._operations.append(self.ChangeSecretOperation(position, new_secret))
 
     def change_valid_from(self, position: OrderPosition, new_value: datetime):
@@ -1943,13 +1948,18 @@ class OrderChangeManager:
 
         :param addons: A list of dictionaries with the keys ``"addon_to"``, ``"item"``, ``"variation"`` (all ID values),
                        ``"count"``, and ``"price"``.
-        :param limit_main_positions: By default, the method works on all methods of the order. If you set this to a
+        :param limit_main_positions: By default, the method works on all positions of the order. If you set this to a
                                      queryset or a list of positions, all other positions and their add-ons will be kept
                                      untouched.
         """
         if self._operations:
             raise ValueError("Setting addons should be the first/only operation")
 
+        def _allowed_on_order_sales_channel(item_or_var, order):
+            return item_or_var.all_sales_channels or (
+                order.sales_channel.identifier in (s.identifier for s in item_or_var.limit_sales_channels.all())
+            )
+
         # Prepare containers for min/max check of products
         item_counts = Counter()
         for p in self.order.positions.all():
@@ -2043,13 +2053,11 @@ class OrderChangeManager:
             if not item.is_available() or (variation and not variation.is_available()):
                 raise OrderError(error_messages['unavailable'])
 
-            if not item.all_sales_channels:
-                if self.order.sales_channel.identifier not in (s.identifier for s in item.limit_sales_channels.all()):
-                    raise OrderError(error_messages['unavailable'])
+            if not _allowed_on_order_sales_channel(item, self.order):
+                raise OrderError(error_messages['unavailable'])
 
-            if variation and not variation.all_sales_channels:
-                if self.order.sales_channel.identifier not in (s.identifier for s in variation.limit_sales_channels.all()):
-                    raise OrderError(error_messages['unavailable'])
+            if variation and not _allowed_on_order_sales_channel(variation, self.order):
+                raise OrderError(error_messages['unavailable'])
 
             if subevent and item.pk in subevent.item_overrides and not subevent.item_overrides[item.pk].is_available():
                 raise OrderError(error_messages['not_for_sale'])
@@ -2097,6 +2105,36 @@ class OrderChangeManager:
                     )
                     item_counts[item] += 1
 
+        def _addon_is_available(a):
+            # If an item is no longer available due to time, it should usually also be no longer
+            # user-removable, because e.g. the stock has already been ordered.
+            # We always set voucher=None because that's what's done when generating the form in
+            # OrderChangeMixin (vouchers for addons are not supported).
+            # This also prevents accidental removal through the UI because a hidden product will no longer
+            # be part of the input.
+            if not _allowed_on_order_sales_channel(a.item, self.order) or (
+                a.variation and not _allowed_on_order_sales_channel(a.variation, self.order)
+            ):
+                return False
+
+            items, _ = prepare_item_list_for_shop(
+                self.order.event,
+                channel=self.order.sales_channel,
+                subevent=a.subevent,
+                voucher=None,
+                base_qs=Item.objects.filter(pk=a.item.pk),
+                allow_addons=True
+            )
+            if (not items) or items[0].current_unavailability_reason:
+                return False
+
+            if a.variation:
+                variations = [var for var in items[0].available_variations if var.pk == a.variation.pk]
+                if (not variations) or variations[0].current_unavailability_reason:
+                    return False
+
+            return True
+
         # Detect removed add-ons and create RemoveOperations
         for cp, al in list(current_addons.items()):
             for k, v in al.items():
@@ -2106,22 +2144,7 @@ class OrderChangeManager:
                     for a in current_addons[cp][k][:current_num - input_num]:
                         if a.canceled:
                             continue
-                        is_unavailable = (
-                            # If an item is no longer available due to time, it should usually also be no longer
-                            # user-removable, because e.g. the stock has already been ordered.
-                            # We always pass has_voucher=True because if a product now requires a voucher, it usually does
-                            # not mean it should be unremovable for others.
-                            # This also prevents accidental removal through the UI because a hidden product will no longer
-                            # be part of the input.
-                            (a.variation and a.variation.unavailability_reason(has_voucher=True, subevent=a.subevent))
-                            or (a.variation and not a.variation.all_sales_channels and not a.variation.limit_sales_channels.contains(self.order.sales_channel))
-                            or a.item.unavailability_reason(has_voucher=True, subevent=a.subevent)
-                            or (
-                                not a.item.all_sales_channels and
-                                not a.item.limit_sales_channels.contains(self.order.sales_channel)
-                            )
-                        )
-                        if is_unavailable:
+                        if not _addon_is_available(a):
                             # "Re-select" add-on
                             selected_addons[cp.id, a.item.category_id][a.item_id, a.variation_id] += 1
                             continue

src/pretix/control/signals.py

@@ -141,7 +141,7 @@ event_dashboard_widgets = EventPluginSignal()
 This signal is sent out to include widgets in the event dashboard. Receivers
 should return a list of dictionaries, where each dictionary can have the keys:
 
-* content (str, containing HTML)
+* content (SafeString, containing HTML)
 * display_size (str, one of "full" (whole row), "big" (half a row) or "small"
   (quarter of a row). May be ignored on small displays, default is "small")
 * priority (int, used for ordering, higher comes first, default is 1)
@@ -158,7 +158,7 @@ Arguments: 'user'
 This signal is sent out to include widgets in the personal user dashboard. Receivers
 should return a list of dictionaries, where each dictionary can have the keys:
 
-* content (str, containing HTML)
+* content (SafeString, containing HTML)
 * display_size (str, one of "full" (whole row), "big" (half a row) or "small"
   (quarter of a row). May be ignored on small displays, default is "small")
 * priority (int, used for ordering, higher comes first, default is 1)

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

@@ -3,6 +3,7 @@
 {% load i18n %}
 {% load static %}
 {% load compress %}
+{% load escapejson %}
 {% block content %}
     <form class="form-signin" action="" method="post" id="webauthn-form">
         {% csrf_token %}
@@ -30,8 +31,7 @@
     </form>
     {% if jsondata %}
         <script type="text/json" id="webauthn-login">
-            {{ jsondata|safe }}
-
+            {{ jsondata|escapejson }}
         </script>
     {% endif %}
     {% compress js %}

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

@@ -28,7 +28,7 @@
                         {% if w.lazy %}
                             <span class="fa fa-cog fa-4x"></span>
                         {% else %}
-                            {{ w.content|safe }}
+                            {{ w.content }}
                         {% endif %}
                     </div>
                 </div>
@@ -51,7 +51,7 @@
                         {% if w.lazy %}
                             <span class="fa fa-cog fa-4x"></span>
                         {% else %}
-                            {{ w.content|safe }}
+                            {{ w.content }}
                         {% endif %}
                     </div>
                 </div>
@@ -72,7 +72,7 @@
                         {% if w.lazy %}
                             <span class="fa fa-cog fa-4x"></span>
                         {% else %}
-                            {{ w.content|safe }}
+                            {{ w.content }}
                         {% endif %}
                     </div>
                 </div>
@@ -94,7 +94,7 @@
                             {% if w.lazy %}
                                 <span class="fa fa-cog fa-4x"></span>
                             {% else %}
-                                {{ w.content|safe }}
+                                {{ w.content }}
                             {% endif %}
                         </a>
                     {% else %}
@@ -102,7 +102,7 @@
                             {% if w.lazy %}
                                 <span class="fa fa-cog fa-4x"></span>
                             {% else %}
-                                {{ w.content|safe }}
+                                {{ w.content }}
                             {% endif %}
                         </div>
                     {% endif %}

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

@@ -106,7 +106,7 @@
                         {% if w.lazy %}
                             <span class="fa fa-cog fa-4x"></span>
                         {% else %}
-                            {{ w.content|safe }}
+                            {{ w.content }}
                         {% endif %}
                     </a>
                 {% elif w.link %}
@@ -114,7 +114,7 @@
                         {% if w.lazy %}
                             <span class="fa fa-cog fa-4x´"></span>
                         {% else %}
-                            {{ w.content|safe }}
+                            {{ w.content }}
                         {% endif %}
                     </a>
                 {% else %}
@@ -122,7 +122,7 @@
                         {% if w.lazy %}
                             <span class="fa fa-cog fa-4x"></span>
                         {% else %}
-                            {{ w.content|safe }}
+                            {{ w.content }}
                         {% endif %}
                     </div>
                 {% endif %}

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

@@ -12,7 +12,7 @@
                 <table class="table table-payment-providers">
                     <tbody>
                     {% for provider in providers %}
-                        <tr>
+                        <tr{% if provider.highlight %} class="success-left"{% endif %}>
                             <td>
                                 <strong>{{ provider.verbose_name }}</strong>
                             </td>
@@ -56,7 +56,7 @@
                             <td colspan="4">
                                 <br>
                                 {% url "control:event.settings.plugins" event=request.event.slug organizer=request.organizer.slug as plugin_settings_url %}
-                                <a href="{{ plugin_settings_url }}#tab-0-1-open" class="btn btn-default">
+                                <a href="{{ plugin_settings_url }}?go=payment#tab-0-1-open" class="btn btn-default">
                                     <i class="fa fa-plus"></i> {% trans "Enable additional payment plugins" %}
                                 </a>
                             </td>

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

@@ -28,6 +28,7 @@
     </div>
     <form action="" method="post" class="form-horizontal form-plugins">
         {% csrf_token %}
+        <input type="hidden" name="go" value="{{ request.GET.go }}">
         <div id="plugin_search_results" class="panel panel-default collapse">
             <div class="panel-heading">
                 <button type="button" class="close" aria-label="Close"><span aria-hidden="true">×</span></button>

src/pretix/control/templates/pretixcontrol/order/cancel.html

@@ -2,6 +2,7 @@
 {% load i18n %}
 {% load bootstrap3 %}
 {% load money %}
+{% load wrap_in %}
 {% block title %}
     {% trans "Cancel order" %}
 {% endblock %}
@@ -26,7 +27,7 @@
         {% if form.cancellation_fee %}
             {% if fee %}
                 {% with fee|money:request.event.currency as f %}
-                    <p>{% blocktrans trimmed with fee="<strong>"|add:f|add:"</strong>"|safe %}
+                    <p>{% blocktrans trimmed with fee=f|wrap_in:"strong" %}
                         The configured cancellation fee for a self-service cancellation would be {{ fee }} for this
                         order, but for a cancellation performed by you, you need to set the cancellation fee here:
                     {% endblocktrans %}</p>

src/pretix/control/templates/pretixcontrol/order/change.html

@@ -284,6 +284,14 @@
                             </div>
                             <div class="col-sm-4">
                                 {% bootstrap_field position.form.operation_secret layout='inline' %}
+                                {% if position.issued_gift_cards.exists %}
+                                    <div class="alert alert-info">
+                                        {% blocktrans trimmed %}
+                                        Ticket secrets of order positions that have been used to issue a gift card can not
+                                        be changed. Only the link will be changed in this case.
+                                        {% endblocktrans %}
+                                    </div>
+                                {% endif %}
                             </div>
                         </div>
 

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

@@ -903,7 +903,7 @@
                                             <tr>
                                                 <td colspan="1"></td>
                                                 <td colspan="5">
-                                                    {{ p.html_info|safe }}
+                                                    {{ p.html_info }}
                                                     {% if staff_session %}
                                                         <p>
                                                             <a href="" class="btn btn-default btn-xs admin-only" data-expandpayment data-id="{{ p.pk }}">
@@ -1018,7 +1018,7 @@
                                                             </dl>
                                                         {% endif %}
                                                         {% if r.html_info %}
-                                                            {{ r.html_info|safe }}
+                                                            {{ r.html_info }}
                                                         {% endif %}
                                                         {% if staff_session %}
                                                             <p>

src/pretix/control/templates/pretixcontrol/organizers/device_connect.html

@@ -2,6 +2,7 @@
 {% load i18n %}
 {% load static %}
 {% load bootstrap3 %}
+{% load escapejson %}
 {% block inner %}
     <h1>{% trans "Connect to device:" %} {{ device.name }}</h1>
 
@@ -18,7 +19,7 @@
                 {% trans "Open the app that you want to connect and optionally reset it to the original state." %}
             </li>
             <li>{% trans "Scan the following configuration code:" %}<br><br>
-                <script type="text/json" data-replace-with-qr>{{ qrdata|safe }}</script><br>
+                <script type="application/json" data-replace-with-qr>{{ qrdata|escapejson_dumps }}</script><br>
                 {% trans "If your app/device does not support scanning a QR code, you can also enter the following information:" %}
                 <br>
                 <strong>{% trans "System URL:" %}</strong> <code id="system_url">{{ settings.SITE_URL }}</code>

src/pretix/control/templates/pretixcontrol/user/2fa_confirm_totp.html

@@ -1,6 +1,7 @@
 {% extends "pretixcontrol/base.html" %}
 {% load i18n %}
 {% load bootstrap3 %}
+{% load escapejson %}
 {% block title %}{% trans "Add a two-factor authentication device" %}{% endblock %}
 {% block content %}
     <h1>{% trans "Add a two-factor authentication device" %}</h1>
@@ -32,7 +33,7 @@
         </li>
         <li>
             {% trans "Add a new account to the app by scanning the following barcode:" %}
-            <div class="qrcode-canvas" data-qrdata="#qrdata"></div>
+            <script type="application/json" data-replace-with-qr>{{ qrdata|escapejson_dumps }}</script>
             <p>
                 <a data-toggle="collapse" href="#no_scan">
                     {% trans "Can't scan the barcode?" %}
@@ -81,9 +82,4 @@
         </li>
     </ol>
 
-    <script type="text/json" id="qrdata">
-        {{ qrdata|safe }}
-
-
-    </script>
 {% endblock %}

src/pretix/control/templates/pretixcontrol/user/2fa_confirm_webauthn.html

@@ -3,6 +3,7 @@
 {% load bootstrap3 %}
 {% load static %}
 {% load compress %}
+{% load escapejson %}
 {% block title %}{% trans "Add a two-factor authentication device" %}{% endblock %}
 {% block content %}
     <h1>{% trans "Add a two-factor authentication device" %}</h1>
@@ -26,9 +27,7 @@
         {% trans "Device registration failed." %}
     </div>
     <script type="text/json" id="webauthn-enroll">
-        {{ jsondata|safe }}
-
-
+        {{ jsondata|escapejson }}
     </script>
     {% compress js %}
         <script type="text/javascript" src="{% static "pretixcontrol/js/base64js.js" %}"></script>

src/pretix/control/templates/pretixcontrol/user/reauth.html

@@ -3,6 +3,7 @@
 {% load bootstrap3 %}
 {% load compress %}
 {% load static %}
+{% load escapejson %}
 {% block content %}
     <form class="form-signin" id="webauthn-form" action="" method="post">
         {% csrf_token %}
@@ -43,7 +44,7 @@
 
         {% if jsondata %}
             <script type="text/json" id="webauthn-login">
-            {{ jsondata|safe }}
+                {{ jsondata|escapejson }}
             </script>
         {% endif %}
         {% compress js %}

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

@@ -115,34 +115,34 @@
                         {% endif %}
                         <th>
                             {% trans "Voucher code" %}
-                            <a href="?{% url_replace request 'ordering' '-code' %}"><i class="fa fa-caret-down"></i></a>
-                            <a href="?{% url_replace request 'ordering' 'code' %}"><i class="fa fa-caret-up"></i></a>
+                            <a href="?{% url_replace request 'filter-ordering' '-code' %}"><i class="fa fa-caret-down"></i></a>
+                            <a href="?{% url_replace request 'filter-ordering' 'code' %}"><i class="fa fa-caret-up"></i></a>
                         </th>
                         <th>
                             {% trans "Redemptions" %}
-                            <a href="?{% url_replace request 'ordering' '-redeemed' %}"><i class="fa fa-caret-down"></i></a>
-                            <a href="?{% url_replace request 'ordering' 'redeemed' %}"><i class="fa fa-caret-up"></i></a>
+                            <a href="?{% url_replace request 'filter-ordering' '-redeemed' %}"><i class="fa fa-caret-down"></i></a>
+                            <a href="?{% url_replace request 'filter-ordering' 'redeemed' %}"><i class="fa fa-caret-up"></i></a>
                         </th>
                         <th>
                             {% trans "Expiry" %}
-                            <a href="?{% url_replace request 'ordering' '-valid_until' %}"><i class="fa fa-caret-down"></i></a>
-                            <a href="?{% url_replace request 'ordering' 'valid_until' %}"><i class="fa fa-caret-up"></i></a>
+                            <a href="?{% url_replace request 'filter-ordering' '-valid_until' %}"><i class="fa fa-caret-down"></i></a>
+                            <a href="?{% url_replace request 'filter-ordering' 'valid_until' %}"><i class="fa fa-caret-up"></i></a>
                         </th>
                         <th>
                             {% trans "Tag" %}
-                            <a href="?{% url_replace request 'ordering' '-tag' %}"><i class="fa fa-caret-down"></i></a>
-                            <a href="?{% url_replace request 'ordering' 'tag' %}"><i class="fa fa-caret-up"></i></a>
+                            <a href="?{% url_replace request 'filter-ordering' '-tag' %}"><i class="fa fa-caret-down"></i></a>
+                            <a href="?{% url_replace request 'filter-ordering' 'tag' %}"><i class="fa fa-caret-up"></i></a>
                         </th>
                         <th>
                             {% trans "Product" %}
-                            <a href="?{% url_replace request 'ordering' '-item' %}"><i class="fa fa-caret-down"></i></a>
-                            <a href="?{% url_replace request 'ordering' 'item' %}"><i class="fa fa-caret-up"></i></a>
+                            <a href="?{% url_replace request 'filter-ordering' '-item' %}"><i class="fa fa-caret-down"></i></a>
+                            <a href="?{% url_replace request 'filter-ordering' 'item' %}"><i class="fa fa-caret-up"></i></a>
                         </th>
                         {% if request.event.has_subevents %}
                             <th>
                                 {% trans "Date" context "subevent" %}
-                                <a href="?{% url_replace request 'ordering' '-subevent' %}"><i class="fa fa-caret-down"></i></a>
-                                <a href="?{% url_replace request 'ordering' 'subevent' %}"><i class="fa fa-caret-up"></i></a>
+                                <a href="?{% url_replace request 'filter-ordering' '-subevent' %}"><i class="fa fa-caret-down"></i></a>
+                                <a href="?{% url_replace request 'filter-ordering' 'subevent' %}"><i class="fa fa-caret-up"></i></a>
                             </th>
                         {% endif %}
                         <th></th>

src/pretix/control/views/dashboards.py

@@ -49,7 +49,7 @@ from django.shortcuts import render
 from django.template.loader import get_template
 from django.urls import reverse
 from django.utils.formats import date_format
-from django.utils.html import escape
+from django.utils.html import conditional_escape, escape, format_html
 from django.utils.timezone import now
 from django.utils.translation import gettext_lazy as _, ngettext, pgettext
 
@@ -112,7 +112,7 @@ def base_widgets(sender, subevent=None, lazy=False, **kwargs):
 
     return [
         {
-            'content': None if lazy else NUM_WIDGET.format(num=intcomma(tickc), text=_('Attendees (ordered)')),
+            'content': None if lazy else format_html(NUM_WIDGET, num=intcomma(tickc), text=_('Attendees (ordered)')),
             'lazy': 'attendees-ordered',
             'display_size': 'small',
             'priority': 100,
@@ -122,7 +122,7 @@ def base_widgets(sender, subevent=None, lazy=False, **kwargs):
             }) + ('?subevent={}'.format(subevent.pk) if subevent else '')
         },
         {
-            'content': None if lazy else NUM_WIDGET.format(num=intcomma(paidc), text=_('Attendees (paid)')),
+            'content': None if lazy else format_html(NUM_WIDGET, num=intcomma(paidc), text=_('Attendees (paid)')),
             'lazy': 'attendees-paid',
             'display_size': 'small',
             'priority': 100,
@@ -132,7 +132,8 @@ def base_widgets(sender, subevent=None, lazy=False, **kwargs):
             }) + ('?subevent={}'.format(subevent.pk) if subevent else '')
         },
         {
-            'content': None if lazy else NUM_WIDGET.format(
+            'content': None if lazy else format_html(
+                NUM_WIDGET,
                 num=money_filter(round_decimal(rev, sender.currency), sender.currency, hide_currency=True),
                 text=_('Total revenue ({currency})').format(currency=sender.currency)
             ),
@@ -145,7 +146,7 @@ def base_widgets(sender, subevent=None, lazy=False, **kwargs):
             }) + ('?subevent={}'.format(subevent.pk) if subevent else '')
         },
         {
-            'content': None if lazy else NUM_WIDGET.format(num=prodc, text=_('Active products')),
+            'content': None if lazy else format_html(NUM_WIDGET, num=prodc, text=_('Active products')),
             'lazy': 'active-products',
             'display_size': 'small',
             'priority': 100,
@@ -209,8 +210,8 @@ def waitinglist_widgets(sender, subevent=None, lazy=False, **kwargs):
                             quota_cache[q.pk] = (quota_cache[q.pk][0], quota_cache[q.pk][1] - min(wlt['cnt'], row[1]))
 
         widgets.append({
-            'content': None if lazy else NUM_WIDGET.format(
-                num=intcomma(happy), text=_('available to give to people on waiting list')
+            'content': None if lazy else format_html(
+                NUM_WIDGET, num=intcomma(happy), text=_('available to give to people on waiting list')
             ),
             'lazy': 'waitinglist-avail',
             'priority': 50,
@@ -220,7 +221,9 @@ def waitinglist_widgets(sender, subevent=None, lazy=False, **kwargs):
             })
         })
         widgets.append({
-            'content': None if lazy else NUM_WIDGET.format(num=intcomma(wles.count()), text=_('total waiting list length')),
+            'content': None if lazy else format_html(
+                NUM_WIDGET, num=intcomma(wles.count()), text=_('total waiting list length')
+            ),
             'lazy': 'waitinglist-length',
             'display_size': 'small',
             'priority': 50,
@@ -247,7 +250,8 @@ def quota_widgets(sender, subevent=None, lazy=False, **kwargs):
         if not lazy:
             status, left = qa.results[q] if q in qa.results else q.availability(allow_cache=True)
         widgets.append({
-            'content': None if lazy else NUM_WIDGET.format(
+            'content': None if lazy else format_html(
+                NUM_WIDGET,
                 num='{}/{}'.format(intcomma(left), intcomma(q.size)) if q.size is not None else '\u221e',
                 text=_('{quota} left').format(quota=escape(q.name))
             ),
@@ -268,7 +272,8 @@ def shop_state_widget(sender, **kwargs):
     return [{
         'display_size': 'small',
         'priority': 1000,
-        'content': '<div class="shopstate">{t1}<br><span class="{cls}"><span class="fa {icon}"></span> {state}</span>{t2}</div>'.format(
+        'content': format_html(
+            '<div class="shopstate">{t1}<br><span class="{cls}"><span class="fa {icon}"></span> {state}</span>{t2}</div>',
             t1=_('Your ticket shop is'), t2=_('Click here to change'),
             state=_('live') if sender.live and not sender.testmode else (
                 _('live and in test mode') if sender.live else (
@@ -299,7 +304,8 @@ def checkin_widget(sender, subevent=None, lazy=False, **kwargs):
     qs = sender.checkin_lists.filter(subevent=subevent)
     for cl in qs:
         widgets.append({
-            'content': None if lazy else NUM_WIDGET.format(
+            'content': None if lazy else format_html(
+                NUM_WIDGET,
                 num='{}/{}'.format(intcomma(cl.inside_count), intcomma(cl.position_count)),
                 text=_('Present – {list}').format(list=escape(cl.name))
             ),
@@ -340,6 +346,12 @@ def welcome_wizard_widget(sender, **kwargs):
     }]
 
 
+def build_json_response(widgets):
+    for widget in widgets:
+        widget['content'] = conditional_escape(widget['content'])
+    return JsonResponse({'widgets': widgets})
+
+
 def event_index(request, organizer, event):
     from pretix.control.forms.event import CommentForm
 
@@ -418,7 +430,7 @@ def event_index_widgets_lazy(request, organizer, event):
     for r, result in event_dashboard_widgets.send(sender=request.event, subevent=subevent, lazy=False):
         widgets.extend(result)
 
-    return JsonResponse({'widgets': widgets})
+    return build_json_response(widgets)
 
 
 def event_index_log_lazy(request, organizer, event):
@@ -505,7 +517,7 @@ def widgets_for_event_qs(request, qs, user, nmax, lazy=False):
         <a href="{url}" class="event">
             <div class="name">{event}</div>
             <div class="daterange">{daterange}</div>
-            <div class="times">{times}</div>
+            <div class="times">{times}{timezone}</div>
         </a>
         <div class="bottomrow">
             {orders}
@@ -549,14 +561,16 @@ def widgets_for_event_qs(request, qs, user, nmax, lazy=False):
                 status = ('success', _('On sale'))
 
         widgets.append({
-            'content': tpl.format(
+            'content': format_html(
+                tpl,
                 event=escape(event.name),
                 times=_('Event series') if event.has_subevents else (
                     ((date_format(event.date_admission.astimezone(tz), 'TIME_FORMAT') + ' / ')
                      if event.date_admission and event.date_admission != event.date_from else '')
                     + (date_format(event.date_from.astimezone(tz), 'TIME_FORMAT') if event.date_from else '')
-                ) + (
-                    ' <span class="fa fa-globe text-muted" data-toggle="tooltip" title="{}"></span>'.format(tzname)
+                ),
+                timezone=(
+                    format_html(' <span class="fa fa-globe text-muted" data-toggle="tooltip" title="{}"></span>', tzname)
                     if tzname != request.timezone and not event.has_subevents else ''
                 ),
                 url=reverse('control:event.index', kwargs={
@@ -564,7 +578,8 @@ def widgets_for_event_qs(request, qs, user, nmax, lazy=False):
                     'organizer': event.organizer.slug
                 }),
                 orders=(
-                    '<a href="{orders_url}" class="orders">{orders_text}</a>'.format(
+                    format_html(
+                        '<a href="{orders_url}" class="orders">{orders_text}</a>',
                         orders_url=reverse('control:event.orders', kwargs={
                             'event': event.slug,
                             'organizer': event.organizer.slug
@@ -631,7 +646,7 @@ def user_index_widgets_lazy(request):
         request.user,
         8
     )
-    return JsonResponse({'widgets': widgets})
+    return build_json_response(widgets)
 
 
 def user_index(request):

src/pretix/control/views/event.py

@@ -41,7 +41,7 @@ from collections import OrderedDict, defaultdict
 from decimal import Decimal
 from io import BytesIO
 from itertools import groupby
-from urllib.parse import urlsplit
+from urllib.parse import quote, urlsplit
 from zoneinfo import ZoneInfo
 
 import bleach
@@ -82,7 +82,7 @@ from pretix.base.models import Event, LogEntry, Order, TaxRule, Voucher
 from pretix.base.models.event import EventMetaValue
 from pretix.base.services import tickets
 from pretix.base.services.invoices import build_preview_invoice_pdf
-from pretix.base.signals import register_ticket_outputs
+from pretix.base.signals import get_defining_app, register_ticket_outputs
 from pretix.base.templatetags.rich_text import markdown_compile_email
 from pretix.control.forms.event import (
     CancelSettingsForm, CommentForm, ConfirmTextFormset, EventDeleteForm,
@@ -441,6 +441,7 @@ class EventPlugins(EventSettingsViewMixin, EventPermissionRequiredMixin, Templat
         plugins_available = {
             p.module: p for p in self.available_plugins(self.object)
         }
+        plugin_enabled = None
 
         with transaction.atomic():
             save_organizer = False
@@ -490,6 +491,7 @@ class EventPlugins(EventSettingsViewMixin, EventPermissionRequiredMixin, Templat
                                 format_html(_('The plugin {} is now active.'),
                                             format_html("<strong>{}</strong>", pluginmeta.name)),
                             ]
+                        plugin_enabled = module
                         messages.success(self.request, mark_safe("".join(info)))
                     else:
                         self.request.event.log_action('pretix.event.plugins.disabled', user=self.request.user,
@@ -499,13 +501,19 @@ class EventPlugins(EventSettingsViewMixin, EventPermissionRequiredMixin, Templat
             self.object.save()
             if save_organizer:
                 self.object.organizer.save()
-        return redirect(self.get_success_url())
+        return redirect(self.get_success_url(plugin_enabled))
 
-    def get_success_url(self) -> str:
-        return reverse('control:event.settings.plugins', kwargs={
-            'organizer': self.request.organizer.slug,
-            'event': self.request.event.slug,
-        })
+    def get_success_url(self, plugin_enabled) -> str:
+        if plugin_enabled and self.request.POST.get('go') == 'payment':
+            return reverse('control:event.settings.payment', kwargs={
+                'organizer': self.request.organizer.slug,
+                'event': self.request.event.slug,
+            }) + '?highlight=' + quote(plugin_enabled) + '#'
+        else:
+            return reverse('control:event.settings.plugins', kwargs={
+                'organizer': self.request.organizer.slug,
+                'event': self.request.event.slug,
+            })
 
 
 class PaymentProviderSettings(EventSettingsViewMixin, EventPermissionRequiredMixin, TemplateView, SingleObjectMixin):
@@ -671,6 +679,8 @@ class PaymentSettings(WritePermissionMixin, EventSettingsViewMixin, EventSetting
             p.sales_channels = [sales_channels[channel] for channel in p.settings.get('_restrict_to_sales_channels', as_type=list, default=['web'])]
             if p.is_meta:
                 p.show_enabled = p.settings._enabled in (True, 'True')
+            if self.request.GET.get('highlight') and getattr(get_defining_app(p), 'name', None) == self.request.GET.get('highlight'):
+                p.highlight = True
         return context
 
 

src/pretix/control/views/orders.py

@@ -64,7 +64,7 @@ from django.urls import reverse
 from django.utils import formats
 from django.utils.formats import date_format, get_format
 from django.utils.functional import cached_property
-from django.utils.html import conditional_escape, escape
+from django.utils.html import conditional_escape, escape, format_html
 from django.utils.http import url_has_allowed_host_and_scheme
 from django.utils.safestring import mark_safe
 from django.utils.timezone import make_aware, now
@@ -79,7 +79,7 @@ from pretix.base.email import get_email_context
 from pretix.base.exporter import MultiSheetListExporter
 from pretix.base.i18n import language
 from pretix.base.models import (
-    CachedFile, CachedTicket, Checkin, Invoice, InvoiceAddress, Item,
+    CachedFile, CachedTicket, Checkin, GiftCard, Invoice, InvoiceAddress, Item,
     ItemVariation, LogEntry, Order, QuestionAnswer, Quota,
     ScheduledEventExport, generate_secret, SeatCategoryMapping,
 )
@@ -551,10 +551,10 @@ class OrderDetail(OrderView):
         ctx['refunds'] = self.order.refunds.select_related('payment').order_by('-created')
         for p in ctx['payments']:
             if p.payment_provider:
-                p.html_info = (p.payment_provider.payment_control_render(self.request, p) or "").strip()
+                p.html_info = p.payment_provider.payment_control_render(self.request, p) or ""
         for r in ctx['refunds']:
             if r.payment_provider:
-                r.html_info = (r.payment_provider.refund_control_render(self.request, r) or "").strip()
+                r.html_info = r.payment_provider.refund_control_render(self.request, r) or ""
         ctx['invoices'] = list(self.order.invoices.all().select_related('event'))
         ctx['comment_form'] = CommentForm(initial={
             'comment': self.order.comment,
@@ -2285,6 +2285,12 @@ class OrderContactChange(OrderView):
     def get_context_data(self, **kwargs):
         ctx = super().get_context_data()
         ctx['form'] = self.form
+        if self.order.all_positions.filter(Exists(GiftCard.objects.filter(issued_in=OuterRef('pk')))).exists():
+            self.form.fields['regenerate_secrets'].help_text = format_html(
+                '{}<br><br><strong><span class="fa fa-warning"></span> {}</strong>',
+                self.form.fields['regenerate_secrets'].help_text,
+                _("Ticket secrets of order positions that have been used to issue a gift card can not be changed. Only the link will be changed in this case."),
+            )
         return ctx
 
     @cached_property

src/pretix/helpers/escapejson.py

@@ -47,5 +47,5 @@ def escapejson(value):
 
 @keep_lazy(str, SafeText)
 def escapejson_attr(value):
-    """Hex encodes characters for use in a html attributw script."""
+    """Hex encodes characters for use in a html attribute."""
     return mark_safe(force_str(value).translate(_json_escapes_attr))

src/pretix/plugins/stripe/static/pretixplugins/stripe/pretix-stripe.js

@@ -323,7 +323,7 @@ $(function () {
             }
         }
     } else if ($("#stripe_payment_intent_next_action_redirect_url").length) {
-        let payment_intent_next_action_redirect_url = $.trim($("#stripe_payment_intent_next_action_redirect_url").html());
+        let payment_intent_next_action_redirect_url = JSON.parse($("#stripe_payment_intent_next_action_redirect_url").html());
         pretixstripe.handlePaymentRedirectAction(payment_intent_next_action_redirect_url);
     } else if ($.trim($("#stripe_payment_intent_action_type").html()) === "promptpay_display_qr_code") {
         waitingDialog.hide();
@@ -432,4 +432,4 @@ $(function () {
             }
         }
     );
-});
+});

src/pretix/plugins/stripe/templates/pretixplugins/stripe/sca.html

@@ -9,7 +9,7 @@
     <script type="text/plain" id="stripe_payment_intent_action_type">{{ payment_intent_action_type }}</script>
     <script type="text/plain" id="stripe_payment_intent_client_secret">{{ payment_intent_client_secret }}</script>
     {% if payment_intent_next_action_redirect_url %}
-        <script type="text/plain" id="stripe_payment_intent_next_action_redirect_url">{{ payment_intent_next_action_redirect_url|safe }}</script>
+        {{ payment_intent_next_action_redirect_url|json_script:"stripe_payment_intent_next_action_redirect_url" }}
     {% endif %}
     {% if payment_intent_redirect_action_handling %}
         <script type="text/plain" id="stripe_payment_intent_redirect_action_handling">{{ payment_intent_redirect_action_handling }}</script>

src/pretix/presale/checkoutflow.py

@@ -87,6 +87,7 @@ from pretix.presale.forms.checkout import (
     ContactForm, InvoiceAddressForm, InvoiceNameForm, MembershipForm,
 )
 from pretix.presale.forms.customer import AuthenticationForm, RegistrationForm
+from pretix.presale.productlist import prepare_item_list_for_shop
 from pretix.presale.signals import (
     checkout_all_optional, checkout_confirm_messages, checkout_flow_steps,
     contact_form_fields, contact_form_fields_overrides,
@@ -99,7 +100,6 @@ from pretix.presale.views.cart import (
     _items_from_post_data, cart_session, create_empty_cart_id,
     get_or_create_cart_id,
 )
-from pretix.presale.views.event import get_grouped_items
 from pretix.presale.views.questions import QuestionsViewMixin
 
 
@@ -603,7 +603,7 @@ class AddOnsStep(CartMixin, AsyncAction, TemplateFlowStep):
 
                 if ckey not in item_cache:
                     # Get all items to possibly show
-                    items, _btn = get_grouped_items(
+                    items, _btn = prepare_item_list_for_shop(
                         self.request.event,
                         subevent=cartpos.subevent,
                         voucher=None,

src/pretix/presale/productlist.py

@@ -0,0 +1,460 @@
+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix 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/>.
+#
+import sys
+from datetime import datetime
+from typing import Optional
+
+from django.conf import settings
+from django.db.models import (
+    Count, Exists, IntegerField, OuterRef, Prefetch, Q, Value,
+)
+from django.db.models.lookups import Exact
+
+from pretix.base.models import (
+    ItemVariation, Quota, SalesChannel, SeatCategoryMapping,
+)
+from pretix.base.models.items import (
+    Item, ItemAddOn, ItemBundle, SubEventItem, SubEventItemVariation,
+)
+from pretix.base.services.quotas import QuotaAvailability
+from pretix.base.timemachine import time_machine_now
+from pretix.presale.signals import item_description
+
+
+def item_group_by_category(items):
+    return sorted(
+        [
+            # a group is a tuple of a category and a list of items
+            (cat, [i for i in items if i.category == cat])
+            for cat in set([i.category for i in items])
+            # insert categories into a set for uniqueness
+            # a set is unsorted, so sort again by category
+        ],
+        key=lambda group: (group[0].position, group[0].id) if (
+            group[0] is not None and group[0].id is not None) else (0, 0)
+    )
+
+
+def prepare_item_list_for_shop(event, *, channel: SalesChannel, subevent=None, voucher=None, require_seat=0, base_qs=None,
+                               allow_addons=False, allow_cross_sell=False,
+                               quota_cache=None, filter_items=None, filter_categories=None, memberships=None,
+                               ignore_hide_sold_out_for_item_ids=None):
+    base_qs_set = base_qs is not None
+    base_qs = base_qs if base_qs is not None else event.items
+
+    requires_seat = Exists(
+        SeatCategoryMapping.objects.filter(
+            product_id=OuterRef('pk'),
+            subevent=subevent
+        )
+    )
+    if not event.settings.seating_choice:
+        requires_seat = Value(0, output_field=IntegerField())
+
+    variation_q = (
+        Q(Q(available_from__isnull=True) | Q(available_from__lte=time_machine_now()) | Q(available_from_mode='info')) &
+        Q(Q(available_until__isnull=True) | Q(available_until__gte=time_machine_now()) | Q(available_until_mode='info'))
+    )
+    if not voucher or not voucher.show_hidden_items:
+        variation_q &= Q(hide_without_voucher=False)
+
+    if memberships is not None:
+        prefetch_membership_types = ['require_membership_types']
+    else:
+        prefetch_membership_types = []
+
+    prefetch_var = Prefetch(
+        'variations',
+        to_attr='available_variations',
+        queryset=ItemVariation.objects.using(settings.DATABASE_REPLICA).annotate(
+            subevent_disabled=Exists(
+                SubEventItemVariation.objects.filter(
+                    Q(disabled=True)
+                    | (Exact(OuterRef('available_from_mode'), 'hide') & Q(available_from__gt=time_machine_now()))
+                    | (Exact(OuterRef('available_until_mode'), 'hide') & Q(available_until__lt=time_machine_now())),
+                    variation_id=OuterRef('pk'),
+                    subevent=subevent,
+                )
+            ),
+        ).filter(
+            variation_q,
+            Q(all_sales_channels=True) | Q(limit_sales_channels=channel),
+            Exists(Quota.variations.through.objects.filter(quota__subevent_id=subevent, itemvariation_id=OuterRef("pk"))),
+            active=True,
+            subevent_disabled=False
+        ).prefetch_related(
+            *prefetch_membership_types,
+            Prefetch('quotas',
+                     to_attr='_subevent_quotas',
+                     queryset=event.quotas.using(settings.DATABASE_REPLICA).filter(
+                         subevent=subevent).select_related("subevent"))
+        ).distinct()
+    )
+    prefetch_quotas = Prefetch(
+        'quotas',
+        to_attr='_subevent_quotas',
+        queryset=event.quotas.using(settings.DATABASE_REPLICA).filter(subevent=subevent).select_related("subevent")
+    )
+    prefetch_bundles = Prefetch(
+        'bundles',
+        queryset=ItemBundle.objects.using(settings.DATABASE_REPLICA).prefetch_related(
+            Prefetch('bundled_item',
+                     queryset=event.items.using(settings.DATABASE_REPLICA).select_related(
+                         'tax_rule').prefetch_related(
+                         Prefetch('quotas',
+                                  to_attr='_subevent_quotas',
+                                  queryset=event.quotas.using(settings.DATABASE_REPLICA).filter(
+                                      subevent=subevent)),
+                     )),
+            Prefetch('bundled_variation',
+                     queryset=ItemVariation.objects.using(
+                         settings.DATABASE_REPLICA
+                     ).select_related('item', 'item__tax_rule').filter(item__event=event).prefetch_related(
+                         Prefetch('quotas',
+                                  to_attr='_subevent_quotas',
+                                  queryset=event.quotas.using(settings.DATABASE_REPLICA).filter(
+                                      subevent=subevent)),
+                     )),
+        )
+    )
+
+    items = base_qs.using(settings.DATABASE_REPLICA).filter_available(
+        channel=channel.identifier, voucher=voucher, allow_addons=allow_addons, allow_cross_sell=allow_cross_sell
+    ).select_related(
+        'category', 'tax_rule',  # for re-grouping
+        'hidden_if_available',
+    ).prefetch_related(
+        *prefetch_membership_types,
+        Prefetch(
+            'hidden_if_item_available',
+            queryset=event.items.annotate(
+                has_variations=Count('variations'),
+            ).prefetch_related(
+                prefetch_var,
+                prefetch_quotas,
+                prefetch_bundles,
+            )
+        ),
+        prefetch_quotas,
+        prefetch_var,
+        prefetch_bundles,
+    ).annotate(
+        has_variations=Count('variations'),
+        subevent_disabled=Exists(
+            SubEventItem.objects.filter(
+                Q(disabled=True)
+                | (Exact(OuterRef('available_from_mode'), 'hide') & Q(available_from__gt=time_machine_now()))
+                | (Exact(OuterRef('available_until_mode'), 'hide') & Q(available_until__lt=time_machine_now())),
+                item_id=OuterRef('pk'),
+                subevent=subevent,
+            )
+        ),
+        mandatory_priced_addons=Exists(
+            ItemAddOn.objects.filter(
+                base_item_id=OuterRef('pk'),
+                min_count__gte=1,
+                price_included=False
+            )
+        ),
+        requires_seat=requires_seat,
+    ).filter(
+        Exists(Quota.items.through.objects.filter(quota__subevent_id=subevent, item_id=OuterRef("pk"))),
+        subevent_disabled=False,
+    ).order_by('category__position', 'category_id', 'position', 'name')
+    if require_seat:
+        items = items.filter(requires_seat__gt=0)
+    elif require_seat is not None:
+        items = items.filter(requires_seat=0)
+
+    if filter_items:
+        items = items.filter(pk__in=[a for a in filter_items if a.isdigit()])
+    if filter_categories:
+        items = items.filter(category_id__in=[a for a in filter_categories if a.isdigit()])
+
+    display_add_to_cart = False
+    quota_cache_key = f'item_quota_cache:{subevent.id if subevent else 0}:{channel.identifier}:{bool(require_seat)}'
+    quota_cache = quota_cache or event.cache.get(quota_cache_key) or {}
+    quota_cache_existed = bool(quota_cache)
+
+    if subevent:
+        item_price_override = subevent.item_price_overrides
+        var_price_override = subevent.var_price_overrides
+    else:
+        item_price_override = {}
+        var_price_override = {}
+
+    restrict_vars = set()
+    if voucher and voucher.quota_id:
+        # If a voucher is set to a specific quota, we need to filter out on that level
+        restrict_vars = set(voucher.quota.variations.all())
+
+    quotas_to_compute = []
+    for item in items:
+        assert item.event_id == event.pk
+        item.event = event  # save a database query if this is looked up
+        if item.has_variations:
+            for v in item.available_variations:
+                for q in v._subevent_quotas:
+                    if q.pk not in quota_cache:
+                        quotas_to_compute.append(q)
+        else:
+            for q in item._subevent_quotas:
+                if q.pk not in quota_cache:
+                    quotas_to_compute.append(q)
+
+    if quotas_to_compute:
+        qa = QuotaAvailability()
+        qa.queue(*quotas_to_compute)
+        qa.compute()
+        quota_cache.update({q.pk: r for q, r in qa.results.items()})
+
+    for item in items:
+        if voucher and voucher.item_id and voucher.variation_id:
+            # Restrict variations if the voucher only allows one
+            item.available_variations = [v for v in item.available_variations
+                                         if v.pk == voucher.variation_id]
+
+        if channel.type_instance.unlimited_items_per_order:
+            max_per_order = sys.maxsize
+        else:
+            max_per_order = item.max_per_order or int(event.settings.max_items_per_order)
+        if voucher:
+            max_per_order = min(max_per_order, voucher.max_usages - voucher.redeemed)
+
+        if item.hidden_if_available:
+            q = item.hidden_if_available.availability(_cache=quota_cache)
+            if q[0] == Quota.AVAILABILITY_OK:
+                item._remove = True
+                continue
+
+        if item.hidden_if_item_available:
+            if item.hidden_if_item_available.has_variations:
+                item._dependency_available = any(
+                    var.check_quotas(subevent=subevent, _cache=quota_cache, include_bundled=True)[0] == Quota.AVAILABILITY_OK
+                    for var in item.hidden_if_item_available.available_variations
+                )
+            else:
+                q = item.hidden_if_item_available.check_quotas(subevent=subevent, _cache=quota_cache, include_bundled=True)
+                time_available = item.hidden_if_item_available.is_available()
+                item._dependency_available = (q[0] == Quota.AVAILABILITY_OK) and time_available
+            if item._dependency_available and item.hidden_if_item_available_mode == Item.UNAVAIL_MODE_HIDDEN:
+                item._remove = True
+                continue
+
+        if item.require_membership and item.require_membership_hidden:
+            if not memberships or not any([m.membership_type in item.require_membership_types.all() for m in memberships]):
+                item._remove = True
+                continue
+
+        item.current_unavailability_reason = _get_item_unavailability_reason(item, has_voucher=voucher, subevent=subevent)
+
+        item.description = str(item.description)
+        for recv, resp in item_description.send(sender=event, item=item, variation=None, subevent=subevent):
+            if resp:
+                item.description += ("<br/>" if item.description else "") + resp
+
+        if not item.has_variations:
+            item._remove = False
+            if not bool(item._subevent_quotas):
+                item._remove = True
+                continue
+
+            if voucher and (voucher.allow_ignore_quota or voucher.block_quota):
+                item.cached_availability = (
+                    Quota.AVAILABILITY_OK, voucher.max_usages - voucher.redeemed
+                )
+            else:
+                item.cached_availability = list(
+                    item.check_quotas(subevent=subevent, _cache=quota_cache, include_bundled=True)
+                )
+
+            if not (
+                    ignore_hide_sold_out_for_item_ids and item.pk in ignore_hide_sold_out_for_item_ids
+            ) and event.settings.hide_sold_out and item.cached_availability[0] < Quota.AVAILABILITY_RESERVED:
+                item._remove = True
+                continue
+
+            item.order_max = min(
+                item.cached_availability[1]
+                if item.cached_availability[1] is not None else sys.maxsize,
+                max_per_order
+            )
+
+            original_price = item_price_override.get(item.pk, item.default_price)
+            voucher_reduced = False
+            if voucher:
+                price = voucher.calculate_price(original_price)
+                voucher_reduced = price < original_price
+                include_bundled = not voucher.all_bundles_included
+            else:
+                price = original_price
+                include_bundled = True
+
+            item.display_price = item.tax(price, currency=event.currency, include_bundled=include_bundled)
+            if item.free_price and item.free_price_suggestion is not None and not voucher_reduced:
+                item.suggested_price = item.tax(max(price, item.free_price_suggestion), currency=event.currency, include_bundled=include_bundled)
+            else:
+                item.suggested_price = item.display_price
+
+            if price != original_price:
+                item.original_price = item.tax(original_price, currency=event.currency, include_bundled=True)
+            else:
+                item.original_price = (
+                    item.tax(item.original_price, currency=event.currency, include_bundled=True,
+                             base_price_is='net' if event.settings.display_net_prices else 'gross')  # backwards-compat
+                    if item.original_price else None
+                )
+            if not display_add_to_cart:
+                display_add_to_cart = not item.requires_seat and item.order_max > 0
+        else:
+            for var in item.available_variations:
+                if var.require_membership and var.require_membership_hidden:
+                    if not memberships or not any([m.membership_type in var.require_membership_types.all() for m in memberships]):
+                        var._remove = True
+                        continue
+
+                var.description = str(var.description)
+                for recv, resp in item_description.send(sender=event, item=item, variation=var, subevent=subevent):
+                    if resp:
+                        var.description += ("<br/>" if var.description else "") + resp
+
+                if voucher and (voucher.allow_ignore_quota or voucher.block_quota):
+                    var.cached_availability = (
+                        Quota.AVAILABILITY_OK, voucher.max_usages - voucher.redeemed
+                    )
+                else:
+                    var.cached_availability = list(
+                        var.check_quotas(subevent=subevent, _cache=quota_cache, include_bundled=True)
+                    )
+
+                var.order_max = min(
+                    var.cached_availability[1]
+                    if var.cached_availability[1] is not None else sys.maxsize,
+                    max_per_order
+                )
+
+                original_price = var_price_override.get(var.pk, var.price)
+                voucher_reduced = False
+                if voucher:
+                    price = voucher.calculate_price(original_price)
+                    voucher_reduced = price < original_price
+                    include_bundled = not voucher.all_bundles_included
+                else:
+                    price = original_price
+                    include_bundled = True
+
+                var.display_price = var.tax(price, currency=event.currency, include_bundled=include_bundled)
+
+                if item.free_price and var.free_price_suggestion is not None and not voucher_reduced:
+                    var.suggested_price = item.tax(max(price, var.free_price_suggestion), currency=event.currency,
+                                                   include_bundled=include_bundled)
+                elif item.free_price and item.free_price_suggestion is not None and not voucher_reduced:
+                    var.suggested_price = item.tax(max(price, item.free_price_suggestion), currency=event.currency,
+                                                   include_bundled=include_bundled)
+                else:
+                    var.suggested_price = var.display_price
+
+                if price != original_price:
+                    var.original_price = var.tax(original_price, currency=event.currency, include_bundled=True)
+                else:
+                    var.original_price = (
+                        var.tax(var.original_price or item.original_price, currency=event.currency,
+                                include_bundled=True,
+                                base_price_is='net' if event.settings.display_net_prices else 'gross')  # backwards-compat
+                    ) if var.original_price or item.original_price else None
+
+                var.current_unavailability_reason = _get_variant_unavailability_reason(var, has_voucher=voucher, subevent=subevent)
+
+            item.original_price = (
+                item.tax(item.original_price, currency=event.currency, include_bundled=True,
+                         base_price_is='net' if event.settings.display_net_prices else 'gross')  # backwards-compat
+                if item.original_price else None
+            )
+
+            item.available_variations = [
+                v for v in item.available_variations if v._subevent_quotas and (
+                    not voucher or not voucher.quota_id or v in restrict_vars
+                ) and not getattr(v, '_remove', False)
+            ]
+
+            if not (ignore_hide_sold_out_for_item_ids and item.pk in ignore_hide_sold_out_for_item_ids) and event.settings.hide_sold_out:
+                item.available_variations = [v for v in item.available_variations
+                                             if v.cached_availability[0] >= Quota.AVAILABILITY_RESERVED]
+
+            if voucher and voucher.variation_id:
+                item.available_variations = [v for v in item.available_variations
+                                             if v.pk == voucher.variation_id]
+
+            if len(item.available_variations) > 0:
+                item.min_price = min([v.display_price.net if event.settings.display_net_prices else
+                                      v.display_price.gross for v in item.available_variations])
+                item.max_price = max([v.display_price.net if event.settings.display_net_prices else
+                                      v.display_price.gross for v in item.available_variations])
+                item.best_variation_availability = max([v.cached_availability[0] for v in item.available_variations])
+
+            item._remove = not bool(item.available_variations)
+            if not item._remove and not display_add_to_cart:
+                display_add_to_cart = not item.requires_seat and any(v.order_max > 0 for v in item.available_variations)
+
+    if not quota_cache_existed and not voucher and not allow_addons and not base_qs_set and not filter_items and not filter_categories:
+        event.cache.set(quota_cache_key, quota_cache, 5)
+    items = [item for item in items
+             if (len(item.available_variations) > 0 or not item.has_variations) and not item._remove]
+    return items, display_add_to_cart
+
+
+def _get_item_unavailability_reason(item, now_dt: Optional[datetime]=None, has_voucher=False, subevent=None) -> Optional[str]:
+    now_dt = now_dt or time_machine_now()
+    subevent_item = subevent and subevent.item_overrides.get(item.pk)
+    if not item.active:
+        return 'active'
+    elif item.available_from and item.available_from > now_dt:
+        return 'available_from'
+    elif item.available_until and item.available_until < now_dt:
+        return 'available_until'
+    elif (item.require_voucher or item.hide_without_voucher) and not has_voucher:
+        return 'require_voucher'
+    elif subevent_item and subevent_item.available_from and subevent_item.available_from > now_dt:
+        return 'available_from'
+    elif subevent_item and subevent_item.available_until and subevent_item.available_until < now_dt:
+        return 'available_until'
+    elif item.hidden_if_item_available and item._dependency_available:
+        return 'hidden_if_item_available'
+    else:
+        return None
+
+
+def _get_variant_unavailability_reason(variant, now_dt: Optional[datetime]=None, has_voucher=False, subevent=None) -> Optional[str]:
+    now_dt = now_dt or time_machine_now()
+    subevent_var = subevent and subevent.var_overrides.get(variant.pk)
+    if not variant.active:
+        return 'active'
+    elif variant.available_from and variant.available_from > now_dt:
+        return 'available_from'
+    elif variant.available_until and variant.available_until < now_dt:
+        return 'available_until'
+    elif subevent_var and subevent_var.available_from and subevent_var.available_from > now_dt:
+        return 'available_from'
+    elif subevent_var and subevent_var.available_until and subevent_var.available_until < now_dt:
+        return 'available_until'
+    else:
+        return None

src/pretix/presale/views/cart.py

@@ -68,13 +68,13 @@ from pretix.base.timemachine import time_machine_now
 from pretix.base.views.tasks import AsyncAction
 from pretix.helpers.http import redirect_to_url
 from pretix.multidomain.urlreverse import eventreverse
+from pretix.presale.productlist import (
+    item_group_by_category, prepare_item_list_for_shop,
+)
 from pretix.presale.views import (
     CartMixin, EventViewMixin, allow_cors_if_namespaced,
     allow_frame_if_namespaced, get_cart, iframe_entry_view_wrapper,
 )
-from pretix.presale.views.event import (
-    get_grouped_items, item_group_by_category,
-)
 from pretix.presale.views.robots import NoSearchIndexViewMixin
 
 try:
@@ -669,7 +669,7 @@ class RedeemView(NoSearchIndexViewMixin, EventViewMixin, CartMixin, TemplateView
         context['max_times'] = self.voucher.max_usages - self.voucher.redeemed
 
         # Fetch all items
-        items, display_add_to_cart = get_grouped_items(
+        items, display_add_to_cart = prepare_item_list_for_shop(
             self.request.event,
             subevent=self.subevent,
             voucher=self.voucher,

src/pretix/presale/views/event.py

@@ -34,7 +34,6 @@
 
 import calendar
 import hashlib
-import sys
 from collections import defaultdict
 from datetime import date, datetime, timedelta
 from decimal import Decimal
@@ -47,10 +46,7 @@ from django import forms
 from django.conf import settings
 from django.contrib import messages
 from django.core.exceptions import PermissionDenied
-from django.db.models import (
-    Count, Exists, IntegerField, OuterRef, Prefetch, Q, Value,
-)
-from django.db.models.lookups import Exact
+from django.db.models import Count
 from django.http import Http404, HttpResponse
 from django.shortcuts import get_object_or_404, redirect, render
 from django.utils.decorators import method_decorator
@@ -65,15 +61,9 @@ from django.views.generic import TemplateView
 
 from pretix.base.auth import has_event_access_permission
 from pretix.base.forms.widgets import SplitDateTimePickerWidget
-from pretix.base.models import (
-    ItemVariation, Quota, SalesChannel, SeatCategoryMapping, Voucher,
-)
+from pretix.base.models import Quota, Voucher
 from pretix.base.models.event import Event, SubEvent
-from pretix.base.models.items import (
-    Item, ItemAddOn, ItemBundle, SubEventItem, SubEventItemVariation,
-)
 from pretix.base.services.placeholders import PlaceholderContext
-from pretix.base.services.quotas import QuotaAvailability
 from pretix.base.timemachine import time_machine_now
 from pretix.helpers.compat import date_fromisocalendar
 from pretix.helpers.formats.en.formats import (
@@ -82,7 +72,10 @@ from pretix.helpers.formats.en.formats import (
 from pretix.helpers.http import redirect_to_url
 from pretix.multidomain.urlreverse import eventreverse
 from pretix.presale.ical import get_public_ical
-from pretix.presale.signals import item_description, seatingframe_html_head
+from pretix.presale.productlist import (
+    item_group_by_category, prepare_item_list_for_shop,
+)
+from pretix.presale.signals import seatingframe_html_head
 from pretix.presale.views.organizer import (
     EventListMixin, add_subevents_for_days, days_for_template,
     filter_qs_by_attr, filter_subevents_with_plugins, has_before_after,
@@ -94,391 +87,12 @@ from . import (
     iframe_entry_view_wrapper,
 )
 
+from pretix.presale.productlist import prepare_item_list_for_shop as get_grouped_items  # noqa
+
+
 SessionStore = import_module(settings.SESSION_ENGINE).SessionStore
 
 
-def item_group_by_category(items):
-    return sorted(
-        [
-            # a group is a tuple of a category and a list of items
-            (cat, [i for i in items if i.category == cat])
-            for cat in set([i.category for i in items])
-            # insert categories into a set for uniqueness
-            # a set is unsorted, so sort again by category
-        ],
-        key=lambda group: (group[0].position, group[0].id) if (
-            group[0] is not None and group[0].id is not None) else (0, 0)
-    )
-
-
-def get_grouped_items(event, *, channel: SalesChannel, subevent=None, voucher=None, require_seat=0, base_qs=None,
-                      allow_addons=False, allow_cross_sell=False,
-                      quota_cache=None, filter_items=None, filter_categories=None, memberships=None,
-                      ignore_hide_sold_out_for_item_ids=None):
-    base_qs_set = base_qs is not None
-    base_qs = base_qs if base_qs is not None else event.items
-
-    requires_seat = Exists(
-        SeatCategoryMapping.objects.filter(
-            product_id=OuterRef('pk'),
-            subevent=subevent
-        )
-    )
-    if not event.settings.seating_choice:
-        requires_seat = Value(0, output_field=IntegerField())
-
-    variation_q = (
-        Q(Q(available_from__isnull=True) | Q(available_from__lte=time_machine_now()) | Q(available_from_mode='info')) &
-        Q(Q(available_until__isnull=True) | Q(available_until__gte=time_machine_now()) | Q(available_until_mode='info'))
-    )
-    if not voucher or not voucher.show_hidden_items:
-        variation_q &= Q(hide_without_voucher=False)
-
-    if memberships is not None:
-        prefetch_membership_types = ['require_membership_types']
-    else:
-        prefetch_membership_types = []
-
-    prefetch_var = Prefetch(
-        'variations',
-        to_attr='available_variations',
-        queryset=ItemVariation.objects.using(settings.DATABASE_REPLICA).annotate(
-            subevent_disabled=Exists(
-                SubEventItemVariation.objects.filter(
-                    Q(disabled=True)
-                    | (Exact(OuterRef('available_from_mode'), 'hide') & Q(available_from__gt=time_machine_now()))
-                    | (Exact(OuterRef('available_until_mode'), 'hide') & Q(available_until__lt=time_machine_now())),
-                    variation_id=OuterRef('pk'),
-                    subevent=subevent,
-                )
-            ),
-        ).filter(
-            variation_q,
-            Q(all_sales_channels=True) | Q(limit_sales_channels=channel),
-            Exists(Quota.variations.through.objects.filter(quota__subevent_id=subevent, itemvariation_id=OuterRef("pk"))),
-            active=True,
-            subevent_disabled=False
-        ).prefetch_related(
-            *prefetch_membership_types,
-            Prefetch('quotas',
-                     to_attr='_subevent_quotas',
-                     queryset=event.quotas.using(settings.DATABASE_REPLICA).filter(
-                         subevent=subevent).select_related("subevent"))
-        ).distinct()
-    )
-    prefetch_quotas = Prefetch(
-        'quotas',
-        to_attr='_subevent_quotas',
-        queryset=event.quotas.using(settings.DATABASE_REPLICA).filter(subevent=subevent).select_related("subevent")
-    )
-    prefetch_bundles = Prefetch(
-        'bundles',
-        queryset=ItemBundle.objects.using(settings.DATABASE_REPLICA).prefetch_related(
-            Prefetch('bundled_item',
-                     queryset=event.items.using(settings.DATABASE_REPLICA).select_related(
-                         'tax_rule').prefetch_related(
-                         Prefetch('quotas',
-                                  to_attr='_subevent_quotas',
-                                  queryset=event.quotas.using(settings.DATABASE_REPLICA).filter(
-                                      subevent=subevent)),
-                     )),
-            Prefetch('bundled_variation',
-                     queryset=ItemVariation.objects.using(
-                         settings.DATABASE_REPLICA
-                     ).select_related('item', 'item__tax_rule').filter(item__event=event).prefetch_related(
-                         Prefetch('quotas',
-                                  to_attr='_subevent_quotas',
-                                  queryset=event.quotas.using(settings.DATABASE_REPLICA).filter(
-                                      subevent=subevent)),
-                     )),
-        )
-    )
-
-    items = base_qs.using(settings.DATABASE_REPLICA).filter_available(
-        channel=channel.identifier, voucher=voucher, allow_addons=allow_addons, allow_cross_sell=allow_cross_sell
-    ).select_related(
-        'category', 'tax_rule',  # for re-grouping
-        'hidden_if_available',
-    ).prefetch_related(
-        *prefetch_membership_types,
-        Prefetch(
-            'hidden_if_item_available',
-            queryset=event.items.annotate(
-                has_variations=Count('variations'),
-            ).prefetch_related(
-                prefetch_var,
-                prefetch_quotas,
-                prefetch_bundles,
-            )
-        ),
-        prefetch_quotas,
-        prefetch_var,
-        prefetch_bundles,
-    ).annotate(
-        has_variations=Count('variations'),
-        subevent_disabled=Exists(
-            SubEventItem.objects.filter(
-                Q(disabled=True)
-                | (Exact(OuterRef('available_from_mode'), 'hide') & Q(available_from__gt=time_machine_now()))
-                | (Exact(OuterRef('available_until_mode'), 'hide') & Q(available_until__lt=time_machine_now())),
-                item_id=OuterRef('pk'),
-                subevent=subevent,
-            )
-        ),
-        mandatory_priced_addons=Exists(
-            ItemAddOn.objects.filter(
-                base_item_id=OuterRef('pk'),
-                min_count__gte=1,
-                price_included=False
-            )
-        ),
-        requires_seat=requires_seat,
-    ).filter(
-        Exists(Quota.items.through.objects.filter(quota__subevent_id=subevent, item_id=OuterRef("pk"))),
-        subevent_disabled=False,
-    ).order_by('category__position', 'category_id', 'position', 'name')
-    if require_seat:
-        items = items.filter(requires_seat__gt=0)
-    elif require_seat is not None:
-        items = items.filter(requires_seat=0)
-
-    if filter_items:
-        items = items.filter(pk__in=[a for a in filter_items if a.isdigit()])
-    if filter_categories:
-        items = items.filter(category_id__in=[a for a in filter_categories if a.isdigit()])
-
-    display_add_to_cart = False
-    quota_cache_key = f'item_quota_cache:{subevent.id if subevent else 0}:{channel.identifier}:{bool(require_seat)}'
-    quota_cache = quota_cache or event.cache.get(quota_cache_key) or {}
-    quota_cache_existed = bool(quota_cache)
-
-    if subevent:
-        item_price_override = subevent.item_price_overrides
-        var_price_override = subevent.var_price_overrides
-    else:
-        item_price_override = {}
-        var_price_override = {}
-
-    restrict_vars = set()
-    if voucher and voucher.quota_id:
-        # If a voucher is set to a specific quota, we need to filter out on that level
-        restrict_vars = set(voucher.quota.variations.all())
-
-    quotas_to_compute = []
-    for item in items:
-        assert item.event_id == event.pk
-        item.event = event  # save a database query if this is looked up
-        if item.has_variations:
-            for v in item.available_variations:
-                for q in v._subevent_quotas:
-                    if q.pk not in quota_cache:
-                        quotas_to_compute.append(q)
-        else:
-            for q in item._subevent_quotas:
-                if q.pk not in quota_cache:
-                    quotas_to_compute.append(q)
-
-    if quotas_to_compute:
-        qa = QuotaAvailability()
-        qa.queue(*quotas_to_compute)
-        qa.compute()
-        quota_cache.update({q.pk: r for q, r in qa.results.items()})
-
-    for item in items:
-        if voucher and voucher.item_id and voucher.variation_id:
-            # Restrict variations if the voucher only allows one
-            item.available_variations = [v for v in item.available_variations
-                                         if v.pk == voucher.variation_id]
-
-        if channel.type_instance.unlimited_items_per_order:
-            max_per_order = sys.maxsize
-        else:
-            max_per_order = item.max_per_order or int(event.settings.max_items_per_order)
-        if voucher:
-            max_per_order = min(max_per_order, voucher.max_usages - voucher.redeemed)
-
-        if item.hidden_if_available:
-            q = item.hidden_if_available.availability(_cache=quota_cache)
-            if q[0] == Quota.AVAILABILITY_OK:
-                item._remove = True
-                continue
-
-        if item.hidden_if_item_available:
-            if item.hidden_if_item_available.has_variations:
-                item._dependency_available = any(
-                    var.check_quotas(subevent=subevent, _cache=quota_cache, include_bundled=True)[0] == Quota.AVAILABILITY_OK
-                    for var in item.hidden_if_item_available.available_variations
-                )
-            else:
-                q = item.hidden_if_item_available.check_quotas(subevent=subevent, _cache=quota_cache, include_bundled=True)
-                time_available = item.hidden_if_item_available.is_available()
-                item._dependency_available = (q[0] == Quota.AVAILABILITY_OK) and time_available
-            if item._dependency_available and item.hidden_if_item_available_mode == Item.UNAVAIL_MODE_HIDDEN:
-                item._remove = True
-                continue
-
-        if item.require_membership and item.require_membership_hidden:
-            if not memberships or not any([m.membership_type in item.require_membership_types.all() for m in memberships]):
-                item._remove = True
-                continue
-
-        item.current_unavailability_reason = item.unavailability_reason(has_voucher=voucher, subevent=subevent)
-
-        item.description = str(item.description)
-        for recv, resp in item_description.send(sender=event, item=item, variation=None, subevent=subevent):
-            if resp:
-                item.description += ("<br/>" if item.description else "") + resp
-
-        if not item.has_variations:
-            item._remove = False
-            if not bool(item._subevent_quotas):
-                item._remove = True
-                continue
-
-            if voucher and (voucher.allow_ignore_quota or voucher.block_quota):
-                item.cached_availability = (
-                    Quota.AVAILABILITY_OK, voucher.max_usages - voucher.redeemed
-                )
-            else:
-                item.cached_availability = list(
-                    item.check_quotas(subevent=subevent, _cache=quota_cache, include_bundled=True)
-                )
-
-            if not (
-                    ignore_hide_sold_out_for_item_ids and item.pk in ignore_hide_sold_out_for_item_ids
-            ) and event.settings.hide_sold_out and item.cached_availability[0] < Quota.AVAILABILITY_RESERVED:
-                item._remove = True
-                continue
-
-            item.order_max = min(
-                item.cached_availability[1]
-                if item.cached_availability[1] is not None else sys.maxsize,
-                max_per_order
-            )
-
-            original_price = item_price_override.get(item.pk, item.default_price)
-            voucher_reduced = False
-            if voucher:
-                price = voucher.calculate_price(original_price)
-                voucher_reduced = price < original_price
-                include_bundled = not voucher.all_bundles_included
-            else:
-                price = original_price
-                include_bundled = True
-
-            item.display_price = item.tax(price, currency=event.currency, include_bundled=include_bundled)
-            if item.free_price and item.free_price_suggestion is not None and not voucher_reduced:
-                item.suggested_price = item.tax(max(price, item.free_price_suggestion), currency=event.currency, include_bundled=include_bundled)
-            else:
-                item.suggested_price = item.display_price
-
-            if price != original_price:
-                item.original_price = item.tax(original_price, currency=event.currency, include_bundled=True)
-            else:
-                item.original_price = (
-                    item.tax(item.original_price, currency=event.currency, include_bundled=True,
-                             base_price_is='net' if event.settings.display_net_prices else 'gross')  # backwards-compat
-                    if item.original_price else None
-                )
-            if not display_add_to_cart:
-                display_add_to_cart = not item.requires_seat and item.order_max > 0
-        else:
-            for var in item.available_variations:
-                if var.require_membership and var.require_membership_hidden:
-                    if not memberships or not any([m.membership_type in var.require_membership_types.all() for m in memberships]):
-                        var._remove = True
-                        continue
-
-                var.description = str(var.description)
-                for recv, resp in item_description.send(sender=event, item=item, variation=var, subevent=subevent):
-                    if resp:
-                        var.description += ("<br/>" if var.description else "") + resp
-
-                if voucher and (voucher.allow_ignore_quota or voucher.block_quota):
-                    var.cached_availability = (
-                        Quota.AVAILABILITY_OK, voucher.max_usages - voucher.redeemed
-                    )
-                else:
-                    var.cached_availability = list(
-                        var.check_quotas(subevent=subevent, _cache=quota_cache, include_bundled=True)
-                    )
-
-                var.order_max = min(
-                    var.cached_availability[1]
-                    if var.cached_availability[1] is not None else sys.maxsize,
-                    max_per_order
-                )
-
-                original_price = var_price_override.get(var.pk, var.price)
-                voucher_reduced = False
-                if voucher:
-                    price = voucher.calculate_price(original_price)
-                    voucher_reduced = price < original_price
-                    include_bundled = not voucher.all_bundles_included
-                else:
-                    price = original_price
-                    include_bundled = True
-
-                var.display_price = var.tax(price, currency=event.currency, include_bundled=include_bundled)
-
-                if item.free_price and var.free_price_suggestion is not None and not voucher_reduced:
-                    var.suggested_price = item.tax(max(price, var.free_price_suggestion), currency=event.currency,
-                                                   include_bundled=include_bundled)
-                elif item.free_price and item.free_price_suggestion is not None and not voucher_reduced:
-                    var.suggested_price = item.tax(max(price, item.free_price_suggestion), currency=event.currency,
-                                                   include_bundled=include_bundled)
-                else:
-                    var.suggested_price = var.display_price
-
-                if price != original_price:
-                    var.original_price = var.tax(original_price, currency=event.currency, include_bundled=True)
-                else:
-                    var.original_price = (
-                        var.tax(var.original_price or item.original_price, currency=event.currency,
-                                include_bundled=True,
-                                base_price_is='net' if event.settings.display_net_prices else 'gross')  # backwards-compat
-                    ) if var.original_price or item.original_price else None
-
-                var.current_unavailability_reason = var.unavailability_reason(has_voucher=voucher, subevent=subevent)
-
-            item.original_price = (
-                item.tax(item.original_price, currency=event.currency, include_bundled=True,
-                         base_price_is='net' if event.settings.display_net_prices else 'gross')  # backwards-compat
-                if item.original_price else None
-            )
-
-            item.available_variations = [
-                v for v in item.available_variations if v._subevent_quotas and (
-                    not voucher or not voucher.quota_id or v in restrict_vars
-                ) and not getattr(v, '_remove', False)
-            ]
-
-            if not (ignore_hide_sold_out_for_item_ids and item.pk in ignore_hide_sold_out_for_item_ids) and event.settings.hide_sold_out:
-                item.available_variations = [v for v in item.available_variations
-                                             if v.cached_availability[0] >= Quota.AVAILABILITY_RESERVED]
-
-            if voucher and voucher.variation_id:
-                item.available_variations = [v for v in item.available_variations
-                                             if v.pk == voucher.variation_id]
-
-            if len(item.available_variations) > 0:
-                item.min_price = min([v.display_price.net if event.settings.display_net_prices else
-                                      v.display_price.gross for v in item.available_variations])
-                item.max_price = max([v.display_price.net if event.settings.display_net_prices else
-                                      v.display_price.gross for v in item.available_variations])
-                item.best_variation_availability = max([v.cached_availability[0] for v in item.available_variations])
-
-            item._remove = not bool(item.available_variations)
-            if not item._remove and not display_add_to_cart:
-                display_add_to_cart = not item.requires_seat and any(v.order_max > 0 for v in item.available_variations)
-
-    if not quota_cache_existed and not voucher and not allow_addons and not base_qs_set and not filter_items and not filter_categories:
-        event.cache.set(quota_cache_key, quota_cache, 5)
-    items = [item for item in items
-             if (len(item.available_variations) > 0 or not item.has_variations) and not item._remove]
-    return items, display_add_to_cart
-
-
 @method_decorator(allow_frame_if_namespaced, 'dispatch')
 @method_decorator(iframe_entry_view_wrapper, 'dispatch')
 class EventIndex(EventViewMixin, EventListMixin, CartMixin, TemplateView):
@@ -582,7 +196,7 @@ class EventIndex(EventViewMixin, EventListMixin, CartMixin, TemplateView):
 
         if not self.request.event.has_subevents or self.subevent:
             # Fetch all items
-            items, display_add_to_cart = get_grouped_items(
+            items, display_add_to_cart = prepare_item_list_for_shop(
                 self.request.event,
                 subevent=self.subevent,
                 filter_items=self.request.GET.getlist('item'),
@@ -634,10 +248,6 @@ class EventIndex(EventViewMixin, EventListMixin, CartMixin, TemplateView):
         context['has_addon_choices'] = any(cp.has_addon_choices for cp in get_cart(self.request))
 
         templating_context = PlaceholderContext(event_or_subevent=self.subevent or self.request.event, event=self.request.event)
-
-        for field in ('presale_has_ended_text',):
-            context[field] = templating_context.format(str(self.request.event.settings[field]))
-
         if self.subevent:
             context['frontpage_text'] = templating_context.format(str(self.subevent.frontpage_text))
         else:

src/pretix/presale/views/order.py

@@ -79,7 +79,7 @@ from pretix.base.services.invoices import (
 )
 from pretix.base.services.orders import (
     OrderChangeManager, OrderError, _try_auto_refund, cancel_order,
-    change_payment_provider, error_messages,
+    change_payment_provider,
 )
 from pretix.base.services.pricing import get_price
 from pretix.base.services.tickets import generate, invalidate_cache
@@ -92,11 +92,11 @@ from pretix.helpers.safedownload import check_token
 from pretix.multidomain.urlreverse import eventreverse, eventreverse_absolute
 from pretix.presale.forms.checkout import InvoiceAddressForm, QuestionsForm
 from pretix.presale.forms.order import OrderPositionChangeForm
+from pretix.presale.productlist import prepare_item_list_for_shop
 from pretix.presale.signals import question_form_fields_overrides
 from pretix.presale.views import (
     CartMixin, EventViewMixin, iframe_entry_view_wrapper,
 )
-from pretix.presale.views.event import get_grouped_items
 from pretix.presale.views.robots import NoSearchIndexViewMixin
 
 logger = logging.getLogger(__name__)
@@ -1452,7 +1452,7 @@ class OrderChangeMixin:
 
                     if ckey not in item_cache:
                         # Get all items to possibly show
-                        items, _btn = get_grouped_items(
+                        items, _btn = prepare_item_list_for_shop(
                             self.request.event,
                             subevent=p.subevent,
                             voucher=None,
@@ -1592,30 +1592,6 @@ class OrderChangeMixin:
                 if val:
                     selected[i, None] = val, price
 
-        if sum(a[0] for a in selected.values()) > category['max_count']:
-            raise ValidationError(
-                error_messages['addon_max_count'] % {
-                    'base': str(form['pos'].item.name),
-                    'max': category['max_count'],
-                    'cat': str(category['category'].name),
-                }
-            )
-        elif sum(a[0] for a in selected.values()) < category['min_count']:
-            raise ValidationError(
-                error_messages['addon_min_count'] % {
-                    'base': str(form['pos'].item.name),
-                    'min': category['min_count'],
-                    'cat': str(category['category'].name),
-                }
-            )
-        elif any(sum(v[0] for k, v in selected.items() if k[0] == i) > 1 for i in category['items']) and not category['multi_allowed']:
-            raise ValidationError(
-                error_messages['addon_no_multi'] % {
-                    'base': str(form['pos'].item.name),
-                    'cat': str(category['category'].name),
-                }
-            )
-
         return selected
 
     def post(self, request, *args, **kwargs):

src/pretix/presale/views/waiting.py

@@ -40,8 +40,8 @@ from pretix.presale.views import EventViewMixin, iframe_entry_view_wrapper
 from ...base.i18n import get_language_without_region
 from ...base.models import Voucher, WaitingListEntry
 from ..forms.waitinglist import WaitingListForm
+from ..productlist import prepare_item_list_for_shop
 from . import allow_frame_if_namespaced
-from .event import get_grouped_items
 
 
 @method_decorator(allow_frame_if_namespaced, 'dispatch')
@@ -53,7 +53,7 @@ class WaitingView(EventViewMixin, FormView):
     @cached_property
     def itemvars(self):
         customer = getattr(self.request, 'customer', None)
-        items, display_add_to_cart = get_grouped_items(
+        items, display_add_to_cart = prepare_item_list_for_shop(
             self.request.event,
             subevent=self.subevent,
             require_seat=None,

src/pretix/presale/views/widget.py

@@ -67,11 +67,11 @@ from pretix.helpers.daterange import daterange
 from pretix.helpers.thumb import get_thumbnail
 from pretix.multidomain.urlreverse import eventreverse_absolute
 from pretix.presale.forms.organizer import meta_filtersets
+from pretix.presale.productlist import (
+    item_group_by_category, prepare_item_list_for_shop,
+)
 from pretix.presale.style import get_theme_vars_css
 from pretix.presale.views.cart import get_or_create_cart_id
-from pretix.presale.views.event import (
-    get_grouped_items, item_group_by_category,
-)
 from pretix.presale.views.organizer import (
     EventListMixin, add_events_for_days, add_subevents_for_days,
     days_for_template, filter_qs_by_attr, filter_subevents_with_plugins,
@@ -321,7 +321,7 @@ class WidgetAPIProductList(EventListMixin, View):
                 ).values_list('item_id', flat=True)
             )
 
-        items, display_add_to_cart = get_grouped_items(
+        items, display_add_to_cart = prepare_item_list_for_shop(
             self.request.event,
             subevent=self.subevent,
             voucher=self.voucher,

src/pretix/static/pretixcontrol/js/ui/main.js

@@ -874,14 +874,6 @@ function setup_basics(el) {
         });
     });
 
-    el.find(".qrcode-canvas").each(function () {
-        $(this).qrcode(
-            {
-                text: $.trim($($(this).attr("data-qrdata")).html())
-            }
-        );
-    });
-
     el.find(".propagated-settings-box").find("input, textarea, select").not("[readonly]")
         .attr("data-propagated-locked", "true").prop("readonly", true);
 

src/pretix/static/pretixcontrol/js/ui/orderchange.js

@@ -1,6 +1,5 @@
 /*global $, gettext*/
 $(function () {
-    // Question view
     if (!$(".form-order-change").length) {
         return;
     }
@@ -57,51 +56,4 @@ $(function () {
             }
         });
     });
-    $('[data-model-select2=seat]').each(function () {
-        var $s = $(this);
-        $s.select2({
-            theme: "bootstrap",
-            delay: 100,
-            allowClear: !$s.prop("required"),
-            width: '100%',
-            language: $("body").attr("data-select2-locale"),
-            placeholder: $(this).attr("data-placeholder"),
-            ajax: {
-                url: function() {
-                    var se = $(this).closest(".form-order-change, .form-horizontal").attr("data-subevent");
-                    var url = $(this).attr('data-select2-url');
-                    var changed = $(this).closest(".form-order-change, .form-horizontal").find("[id$=subevent]").val();
-                    if (changed) {
-                        return url + '?subevent=' + changed;
-                    } else if (se) {
-                        return url + '?subevent=' + se;
-                    } else {
-                        return url;
-                    }
-                },
-                data: function (params) {
-                    return {
-                        query: params.term,
-                        page: params.page || 1
-                    }
-                }
-            },
-            templateResult: function (res) {
-                if (!res.id) {
-                    return res.text;
-                }
-                var $ret = $("<span>").append(
-                    $("<span>").addClass("primary").append($("<div>").text(res.text).html())
-                );
-                if (res.event) {
-                    $ret.append(
-                        $("<span>").addClass("secondary").append(
-                            $("<span>").addClass("fa fa-calendar fa-fw")
-                        ).append(" ").append($("<div>").text(res.event).html())
-                    );
-                }
-                return $ret;
-            },
-        });
-    });
 });

src/pretix/static/pretixcontrol/scss/main.scss

@@ -646,7 +646,10 @@ ul.pagination {
 .table-payment-providers > tbody > tr > td {
     vertical-align: middle;
 }
-
+.success-left {
+  border-left: 3px solid $brand-success;
+  background: var(--pretix-brand-success-lighten-50);
+}
 
 details {
     list-style: none;

src/tests/presale/test_order_change.py

@@ -994,7 +994,7 @@ class OrderChangeAddonsTest(BaseOrdersTest):
             self.order.refresh_from_db()
             assert self.order.total == Decimal('23.00')
 
-    def test_do_not_remove_unavailable_on_adding(self):
+    def test_do_not_remove_timeunavailable_on_adding(self):
         self.iao.max_count = 2
         self.iao.save()
         self.workshop1.available_until = now() - datetime.timedelta(days=1)
@@ -1036,6 +1036,48 @@ class OrderChangeAddonsTest(BaseOrdersTest):
         with scopes_disabled():
             assert self.ticket_pos.addons.count() == 2
 
+    def test_do_not_remove_dependencyunavailable_on_adding(self):
+        self.iao.max_count = 2
+        self.iao.save()
+        self.workshop1.hidden_if_item_available = self.workshop2
+        self.workshop1.save()
+        with scopes_disabled():
+            OrderPosition.objects.create(
+                order=self.order,
+                item=self.workshop1,
+                variation=None,
+                price=Decimal("12"),
+                addon_to=self.ticket_pos,
+                attendee_name_parts={'full_name': "Peter"}
+            )
+            self.order.total += Decimal("12")
+            self.order.save()
+
+        response = self.client.get(
+            '/%s/%s/order/%s/%s/change' % (self.orga.slug, self.event.slug, self.order.code, self.order.secret)
+        )
+        assert response.status_code == 200
+        assert '<li>1x Workshop 1</li>' in response.content.decode()
+        assert f'cp_{self.ticket_pos.pk}_item_{self.workshop1.pk}' not in response.content.decode()
+
+        response = self.client.post(
+            '/%s/%s/order/%s/%s/change' % (self.orga.slug, self.event.slug, self.order.code, self.order.secret),
+            {
+                f'cp_{self.ticket_pos.pk}_variation_{self.workshop2.pk}_{self.workshop2a.pk}': '1'
+            },
+            follow=True
+        )
+        doc = BeautifulSoup(response.content.decode(), "lxml")
+        form_data = extract_form_fields(doc.select('.main-box form')[0])
+        form_data['confirm'] = 'true'
+        response = self.client.post(
+            '/%s/%s/order/%s/%s/change' % (self.orga.slug, self.event.slug, self.order.code, self.order.secret), form_data, follow=True
+        )
+        assert 'alert-success' in response.content.decode()
+
+        with scopes_disabled():
+            assert self.ticket_pos.addons.count() == 2
+
     def test_do_not_overbook_unavailable_on_adding(self):
         self.iao.max_count = 1
         self.iao.save()