[#1364] Minor improvements / comments.

Further fixes of incorrect usage of "relations" as a short form of "relationships".

lib/pleroma/activity.ex

@@ -95,6 +95,7 @@ def with_preloaded_object(query, join_type \\ :inner) do
     |> preload([activity, object: object], object: object)
   end
 
+  # Note: applies to fake activities (ActivityPub.Utils.get_notified_from_object/1 etc.)
   def user_actor(%Activity{actor: nil}), do: nil
 
   def user_actor(%Activity{} = activity) do

lib/pleroma/notification.ex

@@ -322,6 +322,8 @@ def create_notification(%Activity{} = activity, %User{} = user, do_send \\ true)
   @doc """
   Returns a tuple with 2 elements:
     {enabled notification receivers, currently disabled receivers (blocking / [thread] muting)}
+
+  NOTE: might be called for FAKE Activities, see ActivityPub.Utils.get_notified_from_object/1
   """
   def get_notified_from_activity(activity, local_only \\ true)
 
@@ -338,7 +340,7 @@ def get_notified_from_activity(%Activity{data: %{"type" => type}} = activity, lo
     # Since even subscribers and followers can mute / thread-mute, filtering all above AP IDs
     notification_enabled_ap_ids =
       potential_receiver_ap_ids
-      |> exclude_relation_restricting_ap_ids(activity)
+      |> exclude_relationship_restricted_ap_ids(activity)
       |> exclude_thread_muter_ap_ids(activity)
 
     potential_receivers =
@@ -355,10 +357,10 @@ def get_notified_from_activity(%Activity{data: %{"type" => type}} = activity, lo
   def get_notified_from_activity(_, _local_only), do: {[], []}
 
   @doc "Filters out AP IDs of users basing on their relationships with activity actor user"
-  def exclude_relation_restricting_ap_ids([], _activity), do: []
+  def exclude_relationship_restricted_ap_ids([], _activity), do: []
 
-  def exclude_relation_restricting_ap_ids(ap_ids, %Activity{} = activity) do
-    relation_restricted_ap_ids =
+  def exclude_relationship_restricted_ap_ids(ap_ids, %Activity{} = activity) do
+    relationship_restricted_ap_ids =
       activity
       |> Activity.user_actor()
       |> User.incoming_relationships_ungrouped_ap_ids([
@@ -366,7 +368,7 @@ def exclude_relation_restricting_ap_ids(ap_ids, %Activity{} = activity) do
         :notification_mute
       ])
 
-    Enum.uniq(ap_ids) -- relation_restricted_ap_ids
+    Enum.uniq(ap_ids) -- relationship_restricted_ap_ids
   end
 
   @doc "Filters out AP IDs of users who mute activity thread"

lib/pleroma/thread_mute.ex

@@ -41,15 +41,16 @@ def muters_query(context) do
 
   def muter_ap_ids(context, ap_ids \\ nil)
 
-  def muter_ap_ids(context, ap_ids) when context not in [nil, ""] do
+  # Note: applies to fake activities (ActivityPub.Utils.get_notified_from_object/1 etc.)
+  def muter_ap_ids(context, _ap_ids) when is_nil(context), do: []
+
+  def muter_ap_ids(context, ap_ids) do
     context
     |> muters_query()
     |> maybe_filter_on_ap_id(ap_ids)
     |> Repo.all()
   end
 
-  def muter_ap_ids(_context, _ap_ids), do: []
-
   defp maybe_filter_on_ap_id(query, ap_ids) when is_list(ap_ids) do
     where(query, [tm, u], u.ap_id in ^ap_ids)
   end