Mastodon API: ensure the notification endpoint doesn't return less than the requested amount of records unless it's the last page

lib/pleroma/notification.ex

@@ -166,8 +166,16 @@ defmodule Pleroma.Notification do
       query
       |> join(:left, [n, a], mutated_activity in Pleroma.Activity,
         on:
-          fragment("?->>'context'", a.data) ==
-            fragment("?->>'context'", mutated_activity.data) and
+          fragment(
+            "COALESCE((?->'object')->>'id', ?->>'object')",
+            a.data,
+            a.data
+          ) ==
+            fragment(
+              "COALESCE((?->'object')->>'id', ?->>'object')",
+              mutated_activity.data,
+              mutated_activity.data
+            ) and
             fragment("(?->>'type' = 'Like' or ?->>'type' = 'Announce')", a.data, a.data) and
             fragment("?->>'type'", mutated_activity.data) == "Create",
         as: :mutated_activity
@@ -541,6 +549,7 @@ defmodule Pleroma.Notification do
   def skip?(%Activity{} = activity, %User{} = user) do
     [
       :self,
+      :invisible,
       :followers,
       :follows,
       :non_followers,
@@ -557,6 +566,12 @@ defmodule Pleroma.Notification do
     activity.data["actor"] == user.ap_id
   end
 
+  def skip?(:invisible, %Activity{} = activity, _) do
+    actor = activity.data["actor"]
+    user = User.get_cached_by_ap_id(actor)
+    User.invisible?(user)
+  end
+
   def skip?(
         :followers,
         %Activity{} = activity,

lib/pleroma/user.ex

@@ -1488,6 +1488,7 @@ defmodule Pleroma.User do
     end)
 
     delete_user_activities(user)
+    delete_notifications_from_user_activities(user)
 
     delete_outgoing_pending_follow_requests(user)
 
@@ -1576,6 +1577,13 @@ defmodule Pleroma.User do
     })
   end
 
+  def delete_notifications_from_user_activities(%User{ap_id: ap_id}) do
+    Notification
+    |> join(:inner, [n], activity in assoc(n, :activity))
+    |> where([n, a], fragment("? = ?", a.actor, ^ap_id))
+    |> Repo.delete_all()
+  end
+
   def delete_user_activities(%User{ap_id: ap_id} = user) do
     ap_id
     |> Activity.Queries.by_actor()

lib/pleroma/web/mastodon_api/views/notification_view.ex

@@ -46,6 +46,7 @@ defmodule Pleroma.Web.MastodonAPI.NotificationView do
             activities
             |> Enum.filter(&(&1.data["type"] == "Move"))
             |> Enum.map(&User.get_cached_by_ap_id(&1.data["target"]))
+            |> Enum.filter(& &1)
 
           actors =
             activities
@@ -84,50 +85,45 @@ defmodule Pleroma.Web.MastodonAPI.NotificationView do
     # Note: :relationships contain user mutes (needed for :muted flag in :status)
     status_render_opts = %{relationships: opts[:relationships]}
 
-    with %{id: _} = account <-
-           AccountView.render(
-             "show.json",
-             %{user: actor, for: reading_user}
-           ) do
-      response = %{
-        id: to_string(notification.id),
-        type: notification.type,
-        created_at: CommonAPI.Utils.to_masto_date(notification.inserted_at),
-        account: account,
-        pleroma: %{
-          is_seen: notification.seen
-        }
+    account =
+      AccountView.render(
+        "show.json",
+        %{user: actor, for: reading_user}
+      )
+
+    response = %{
+      id: to_string(notification.id),
+      type: notification.type,
+      created_at: CommonAPI.Utils.to_masto_date(notification.inserted_at),
+      account: account,
+      pleroma: %{
+        is_seen: notification.seen
       }
+    }
 
-      case notification.type do
-        "mention" ->
-          put_status(response, activity, reading_user, status_render_opts)
+    case notification.type do
+      "mention" ->
+        put_status(response, activity, reading_user, status_render_opts)
 
-        "favourite" ->
-          put_status(response, parent_activity_fn.(), reading_user, status_render_opts)
+      "favourite" ->
+        put_status(response, parent_activity_fn.(), reading_user, status_render_opts)
 
-        "reblog" ->
-          put_status(response, parent_activity_fn.(), reading_user, status_render_opts)
+      "reblog" ->
+        put_status(response, parent_activity_fn.(), reading_user, status_render_opts)
 
-        "move" ->
-          put_target(response, activity, reading_user, %{})
+      "move" ->
+        put_target(response, activity, reading_user, %{})
 
-        "pleroma:emoji_reaction" ->
-          response
-          |> put_status(parent_activity_fn.(), reading_user, status_render_opts)
-          |> put_emoji(activity)
+      "pleroma:emoji_reaction" ->
+        response
+        |> put_status(parent_activity_fn.(), reading_user, status_render_opts)
+        |> put_emoji(activity)
 
-        "pleroma:chat_mention" ->
-          put_chat_message(response, activity, reading_user, status_render_opts)
+      "pleroma:chat_mention" ->
+        put_chat_message(response, activity, reading_user, status_render_opts)
 
-        type when type in ["follow", "follow_request"] ->
-          response
-
-        _ ->
-          nil
-      end
-    else
-      _ -> nil
+      type when type in ["follow", "follow_request"] ->
+        response
     end
   end