[longplay] Add ability to undo finishes

vrobbler/apps/scrobbles/views.py

@@ -909,6 +909,28 @@ def scrobble_longplay_finish(request, uuid):
     if not user.is_authenticated:
         return HttpResponseRedirect(success_url)
 
+    # Try scrobble UUID first
+    scrobble = Scrobble.objects.filter(uuid=uuid, user=user).first()
+    if scrobble:
+        if scrobble.long_play_complete == True:
+            scrobble.long_play_complete = None
+            scrobble.save(update_fields=["long_play_complete"])
+            messages.add_message(
+                request,
+                messages.INFO,
+                f"Long play of {scrobble.media_obj} marked as not complete.",
+            )
+        else:
+            scrobble.long_play_complete = True
+            scrobble.save(update_fields=["long_play_complete"])
+            messages.add_message(
+                request,
+                messages.SUCCESS,
+                f"Long play of {scrobble.media_obj} finished.",
+            )
+        return HttpResponseRedirect(success_url)
+
+    # Fall back to media UUID (existing behavior)
     media_obj = None
     for app, model in LONG_PLAY_MEDIA.items():
         media_model = apps.get_model(app_label=app, model_name=model)
@@ -917,10 +939,21 @@ def scrobble_longplay_finish(request, uuid):
             break
 
     if not media_obj:
-        return
+        messages.add_message(
+            request, messages.ERROR, f"Media with uuid {uuid} not found."
+        )
+        return HttpResponseRedirect(success_url)
 
     last_scrobble = media_obj.last_long_play_scrobble_for_user(user)
-    if last_scrobble and last_scrobble.long_play_complete == False:
+    if last_scrobble and last_scrobble.long_play_complete == True:
+        last_scrobble.long_play_complete = None
+        last_scrobble.save(update_fields=["long_play_complete"])
+        messages.add_message(
+            request,
+            messages.INFO,
+            f"Long play of {media_obj} marked as not complete.",
+        )
+    elif last_scrobble:
         last_scrobble.long_play_complete = True
         last_scrobble.save(update_fields=["long_play_complete"])
         messages.add_message(
@@ -928,12 +961,6 @@ def scrobble_longplay_finish(request, uuid):
             messages.SUCCESS,
             f"Long play of {media_obj} finished.",
         )
-    elif last_scrobble and last_scrobble.long_play_complete == True:
-        messages.add_message(
-            request,
-            messages.INFO,
-            f"Long play of {media_obj} was already completed.",
-        )
     else:
         messages.add_message(
             request, messages.ERROR, f"Media with uuid {uuid} not found."