Add customized links to page footer (#2685)

Co-authored-by: Richard Schreiber <wiffbi@gmail.com>

src/pretix/base/migrations/0217_eventfooterlink_organizerfooterlink.py

@@ -0,0 +1,33 @@
+# Generated by Django 3.2.12 on 2022-06-15 08:10
+
+import django.db.models.deletion
+import i18nfield.fields
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0216_checkin_forced_sent'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='OrganizerFooterLink',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('label', i18nfield.fields.I18nCharField(max_length=200)),
+                ('url', models.URLField()),
+                ('organizer', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='footer_links', to='pretixbase.organizer')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='EventFooterLink',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('label', i18nfield.fields.I18nCharField(max_length=200)),
+                ('url', models.URLField()),
+                ('event', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='footer_links', to='pretixbase.event')),
+            ],
+        ),
+    ]

src/pretix/base/models/event.py

@@ -718,6 +718,11 @@ class Event(EventMixin, LoggedModel):
         self.save()
         self.log_action('pretix.object.cloned', data={'source': other.slug, 'source_id': other.pk})
 
+        for fl in EventFooterLink.objects.filter(event=other):
+            fl.pk = None
+            fl.event = self
+            fl.save(force_insert=True)
+
         tax_map = {}
         for t in other.tax_rules.all():
             tax_map[t.pk] = t
@@ -1612,3 +1617,25 @@ class SubEventMetaValue(LoggedModel):
         super().save(*args, **kwargs)
         if self.subevent:
             self.subevent.event.cache.clear()
+
+
+class EventFooterLink(models.Model):
+    """
+    A footer link assigned to an event.
+    """
+    event = models.ForeignKey('Event', on_delete=models.CASCADE, related_name='footer_links')
+    label = I18nCharField(
+        max_length=200,
+        verbose_name=_("Link text"),
+    )
+    url = models.URLField(
+        verbose_name=_("Link URL"),
+    )
+
+    def delete(self, *args, **kwargs):
+        super().delete(*args, **kwargs)
+        self.event.cache.clear()
+
+    def save(self, *args, **kwargs):
+        super().save(*args, **kwargs)
+        self.event.cache.clear()

src/pretix/base/models/organizer.py

@@ -46,6 +46,7 @@ from django.utils.crypto import get_random_string
 from django.utils.functional import cached_property
 from django.utils.timezone import get_current_timezone, make_aware, now
 from django.utils.translation import gettext_lazy as _
+from i18nfield.fields import I18nCharField
 
 from pretix.base.models.base import LoggedModel
 from pretix.base.validators import OrganizerSlugBanlistValidator
@@ -464,3 +465,25 @@ class TeamAPIToken(models.Model):
             return self.get_events_with_any_permission()
         else:
             return self.team.organizer.events.none()
+
+
+class OrganizerFooterLink(models.Model):
+    """
+    A footer link assigned to an organizer.
+    """
+    organizer = models.ForeignKey('Organizer', on_delete=models.CASCADE, related_name='footer_links')
+    label = I18nCharField(
+        max_length=200,
+        verbose_name=_("Link text"),
+    )
+    url = models.URLField(
+        verbose_name=_("Link URL"),
+    )
+
+    def delete(self, *args, **kwargs):
+        super().delete(*args, **kwargs)
+        self.organizer.cache.clear()
+
+    def save(self, *args, **kwargs):
+        super().save(*args, **kwargs)
+        self.organizer.cache.clear()