activity_pub.ex: Move limit/max_id restrictions to Pagination helpers

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -7,6 +7,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   alias Pleroma.Instances
   alias Pleroma.Notification
   alias Pleroma.Object
+  alias Pleroma.Pagination
   alias Pleroma.Repo
   alias Pleroma.Upload
   alias Pleroma.User
@@ -474,7 +475,7 @@ def fetch_public_activities(opts \\ %{}) do
 
     q
     |> restrict_unlisted()
-    |> Repo.all()
+    |> Pagination.fetch_paginated(opts)
     |> Enum.reverse()
   end
 
@@ -617,26 +618,12 @@ defp restrict_recipients(query, recipients, user) do
     )
   end
 
-  defp restrict_limit(query, %{"limit" => limit}) do
-    from(activity in query, limit: ^limit)
-  end
-
-  defp restrict_limit(query, _), do: query
-
   defp restrict_local(query, %{"local_only" => true}) do
     from(activity in query, where: activity.local == true)
   end
 
   defp restrict_local(query, _), do: query
 
-  defp restrict_max(query, %{"max_id" => ""}), do: query
-
-  defp restrict_max(query, %{"max_id" => max_id}) do
-    from(activity in query, where: activity.id < ^max_id)
-  end
-
-  defp restrict_max(query, _), do: query
-
   defp restrict_actor(query, %{"actor_id" => actor_id}) do
     from(activity in query, where: activity.actor == ^actor_id)
   end
@@ -757,12 +744,7 @@ defp maybe_preload_objects(query, _) do
   end
 
   def fetch_activities_query(recipients, opts \\ %{}) do
-    base_query =
+    base_query = from(activity in Activity)
-      from(
-        activity in Activity,
-        limit: 20,
-        order_by: [fragment("? desc nulls last", activity.id)]
-      )
 
     base_query
     |> maybe_preload_objects(opts)
@@ -772,8 +754,6 @@ def fetch_activities_query(recipients, opts \\ %{}) do
     |> restrict_tag_all(opts)
     |> restrict_since(opts)
     |> restrict_local(opts)
-    |> restrict_limit(opts)
-    |> restrict_max(opts)
     |> restrict_actor(opts)
     |> restrict_type(opts)
     |> restrict_favorited_by(opts)
@@ -789,14 +769,14 @@ def fetch_activities_query(recipients, opts \\ %{}) do
 
   def fetch_activities(recipients, opts \\ %{}) do
     fetch_activities_query(recipients, opts)
-    |> Repo.all()
+    |> Pagination.fetch_paginated(opts)
     |> Enum.reverse()
   end
 
   def fetch_activities_bounded(recipients_to, recipients_cc, opts \\ %{}) do
     fetch_activities_query([], opts)
     |> restrict_to_cc(recipients_to, recipients_cc)
-    |> Repo.all()
+    |> Pagination.fetch_paginated(opts)
     |> Enum.reverse()
   end
 

lib/pleroma/web/mastodon_api/mastodon_api_controller.ex

@@ -10,6 +10,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
   alias Pleroma.Filter
   alias Pleroma.Notification
   alias Pleroma.Object
+  alias Pleroma.Pagination
   alias Pleroma.Repo
   alias Pleroma.Stats
   alias Pleroma.User
@@ -310,7 +311,7 @@ def dm_timeline(%{assigns: %{user: user}} = conn, params) do
     activities =
       [user.ap_id]
       |> ActivityPub.fetch_activities_query(params)
-      |> Repo.all()
+      |> Pagination.fetch_paginated(params)
 
     conn
     |> add_link_headers(:dm_timeline, activities)