Also look for remote content to retract based on share activity ID

Fixes Socialhome to Socialhome share retract over ActivityPub which broke while fixing Socialhome to other ActivityPub platforms share retract fixing..

socialhome/federate/utils/tasks.py

@@ -5,6 +5,7 @@ import django_rq
 from federation.entities import base
 from federation.fetchers import retrieve_remote_profile, retrieve_remote_content
 
+from socialhome.content.enums import ContentType
 from socialhome.content.models import Content
 from socialhome.content.utils import safe_text, safe_text_for_markdown
 from socialhome.enums import Visibility
@@ -238,8 +239,12 @@ def _retract_content(target_fid, profile):
     try:
         content = Content.objects.fed(target_fid, local=False).get()
     except Content.DoesNotExist:
-        logger.warning("Retracted remote content %s cannot be found", target_fid)
-        return
+        # Try by shared activity fid
+        try:
+            content = Content.objects.get(activities__fid=target_fid, local=False, content_type=ContentType.SHARE)
+        except Content.DoesNotExist:
+            logger.warning("Retracted remote content %s cannot be found", target_fid)
+            return
     if content.author != profile:
         logger.warning("Content %s is not owned by remote retraction profile %s", content, profile)
         return