feat: Completely rework notification framework

This change is needed as
a) there are many different types of notifications. A notification about a new comment does not only relate the comment but also adoption notice and a user that made the comment. Therefore, I introduce a new general notification that has optional links to other objects.
b) this change allows to define a different representation of e-mails vs. display on the website. The new notification type is in charge of representation from now on. Title and text will be deprecated and eventually removed

src/fellchensammlung/tools/admin.py

@@ -10,7 +10,7 @@ from django.core import mail
 from django.utils.html import strip_tags
 
 from fellchensammlung.models import AdoptionNotice, Location, RescueOrganization, AdoptionNoticeStatus, Log, \
-    AdoptionNoticeNotification
+    Notification, NotificationTypeChoices
 from fellchensammlung.tools.misc import is_404
 
 
@@ -92,10 +92,11 @@ def deactivate_404_adoption_notices():
 
                 deactivation_message = f'Die Vermittlung  [{adoption_notice.name}]({adoption_notice.get_absolute_url()}) wurde automatisch deaktiviert, da die Website unter "Mehr Informationen" nicht mehr online ist.'
                 for subscription in adoption_notice.get_subscriptions():
-                    AdoptionNoticeNotification.objects.create(user=subscription.owner,
-                                                              title="Vermittlung deaktiviert",
-                                                              adoption_notice=adoption_notice,
-                                                              text=deactivation_message)
+                    Notification.objects.create(user_to_notify=subscription.owner,
+                                                notification_type=NotificationTypeChoices.AN_WAS_DEACTIVATED,
+                                                title="Vermittlung deaktiviert",
+                                                adoption_notice=adoption_notice,
+                                                text=deactivation_message)
 
 
 def dedup_location(location: Location, destructive=False):

src/fellchensammlung/tools/notifications.py

@@ -1,4 +1,4 @@
-from fellchensammlung.models import User, AdoptionNoticeNotification, TrustLevel
+from fellchensammlung.models import User, Notification, TrustLevel, NotificationTypeChoices
 
 
 def notify_of_AN_to_be_checked(adoption_notice):
@@ -6,8 +6,9 @@ def notify_of_AN_to_be_checked(adoption_notice):
         users_to_notify = set(User.objects.filter(trust_level__gt=TrustLevel.MODERATOR))
         users_to_notify.add(adoption_notice.owner)
         for user in users_to_notify:
-            AdoptionNoticeNotification.objects.create(adoption_notice=adoption_notice,
-                                                      user=user,
-                                                      title=f" Prüfe Vermittlung {adoption_notice}",
-                                                      text=f"{adoption_notice} muss geprüft werden bevor sie veröffentlicht wird.",
-                                                      )
+            Notification.objects.create(adoption_notice=adoption_notice,
+                                        user_to_notify=user,
+                                        notification_type=NotificationTypeChoices.AN_IS_TO_BE_CHECKED,
+                                        title=f" Prüfe Vermittlung {adoption_notice}",
+                                        text=f"{adoption_notice} muss geprüft werden bevor sie veröffentlicht wird.",
+                                        )

src/fellchensammlung/tools/search.py

@@ -3,7 +3,8 @@ from django.utils.translation import gettext_lazy as _
 
 from .geo import LocationProxy, Position
 from ..forms import AdoptionNoticeSearchForm
-from ..models import SearchSubscription, AdoptionNotice, AdoptionNoticeNotification, SexChoicesWithAll, Location
+from ..models import SearchSubscription, AdoptionNotice, SexChoicesWithAll, Location, \
+    Notification, NotificationTypeChoices
 
 
 def notify_search_subscribers(adoption_notice: AdoptionNotice, only_if_active: bool = True):
@@ -20,10 +21,11 @@ def notify_search_subscribers(adoption_notice: AdoptionNotice, only_if_active: b
         search = Search(search_subscription=search_subscription)
         if search.adoption_notice_fits_search(adoption_notice):
             notification_text = f"{_('Zu deiner Suche')} {search_subscription} wurde eine neue Vermittlung gefunden"
-            AdoptionNoticeNotification.objects.create(user=search_subscription.owner,
-                                                      title=f"{_('Neue Vermittlung')}: {adoption_notice}",
-                                                      adoption_notice=adoption_notice,
-                                                      text=notification_text)
+            Notification.objects.create(user_to_notify=search_subscription.owner,
+                                        notification_type=NotificationTypeChoices.AN_FOR_SEARCH_FOUND,
+                                        title=f"{_('Neue Vermittlung')}: {adoption_notice}",
+                                        adoption_notice=adoption_notice,
+                                        text=notification_text)
             logging.debug(f"Notification for search subscription {search_subscription} was sent.")
         else:
             logging.debug(f"Adoption notice {adoption_notice} was not fitting the search subscription.")