Add OAuth2 scopes to app config

(cherry picked from commit 1d3401aa)

aleksis/apps/resint/apps.py

+from django.apps import apps
+from django.utils.translation import gettext as _
+
 from aleksis.core.util.apps import AppConfig
 
 
@@ -14,3 +17,14 @@ class ResintConfig(AppConfig):
         ([2020, 2021], "Frank Poetzsch-Heffter", "p-h@katharineum.de"),
         ([2019], "Julian Leucker", "leuckeju@katharineum.de"),
     )
+
+    @classmethod
+    def get_all_scopes(cls) -> dict[str, str]:
+        """Return all OAuth scopes and their descriptions for this app."""
+        LiveDocument = apps.get_model("resint", "LiveDocument")
+        scopes = {}
+        for live_document in LiveDocument.objects.all():
+            scopes[live_document.scope] = _("Access PDF file for live document {}").format(
+                live_document.name
+            )
+        return scopes

aleksis/apps/resint/models.py

@@ -193,6 +193,11 @@ class LiveDocument(ExtensiblePolymorphicModel):
         """Get the filename without path of the PDF file."""
         return f"{self.slug}.pdf"
 
+    @property
+    def scope(self) -> str:
+        """Return OAuth2 scope name to access PDF file via API."""
+        return f"live_document_pdf_{self.slug}"
+
     def save(self, *args, **kwargs):
         with reversion.create_revision():
             super().save(*args, **kwargs)