maybe_notify_subscribers: Don't create notifications from ingested replies

Backport of: !3505

CHANGELOG.md

@@ -20,6 +20,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - MastodonAPI: Stream out Create activities
 - MRF ObjectAgePolicy: Fix pattern matching on "published"
 - TwitterAPI: Make `change_password` and `change_email` require params on body instead of query
+- Subscription(Bell) Notifications: Don't create from Pipeline Ingested replies
 
 ## 2.4.0 - 2021-08-08
 

lib/pleroma/web/common_api/utils.ex

@@ -412,19 +412,14 @@ def maybe_notify_mentioned_recipients(
 
   def maybe_notify_mentioned_recipients(recipients, _), do: recipients
 
-  # Do not notify subscribers if author is making a reply
-  def maybe_notify_subscribers(recipients, %Activity{
-        object: %Object{data: %{"inReplyTo" => _ap_id}}
-      }) do
-    recipients
-  end
-
   def maybe_notify_subscribers(
         recipients,
-        %Activity{data: %{"actor" => actor, "type" => type}} = activity
-      )
-      when type == "Create" do
-    with %User{} = user <- User.get_cached_by_ap_id(actor) do
+        %Activity{data: %{"actor" => actor, "type" => "Create"}} = activity
+      ) do
+    # Do not notify subscribers if author is making a reply
+    with %Object{data: object} <- Object.normalize(activity, fetch: false),
+         nil <- object["inReplyTo"],
+         %User{} = user <- User.get_cached_by_ap_id(actor) do
       subscriber_ids =
         user
         |> User.subscriber_users()