Extend Pleroma.Pagination to support offset-based pagination, use async/await to execute status and account search in parallel

lib/pleroma/activity/search.ex

@@ -5,14 +5,17 @@
 defmodule Pleroma.Activity.Search do
   alias Pleroma.Activity
   alias Pleroma.Object.Fetcher
-  alias Pleroma.Repo
+  alias Pleroma.Pagination
   alias Pleroma.User
   alias Pleroma.Web.ActivityPub.Visibility
 
   import Ecto.Query
 
-  def search(user, search_query) do
+  def search(user, search_query, options \\ []) do
     index_type = if Pleroma.Config.get([:database, :rum_enabled]), do: :rum, else: :gin
+    limit = Enum.min([Keyword.get(options, :limit), 40])
+    offset = Keyword.get(options, :offset, 0)
+    author = Keyword.get(options, :author)
 
     Activity
     |> Activity.with_preloaded_object()
@@ -20,15 +23,23 @@ defmodule Pleroma.Activity.Search do
     |> restrict_public()
     |> query_with(index_type, search_query)
     |> maybe_restrict_local(user)
-    |> Repo.all()
+    |> maybe_restrict_author(author)
+    |> Pagination.fetch_paginated(%{"offset" => offset, "limit" => limit}, :offset)
     |> maybe_fetch(user, search_query)
   end
 
+  def maybe_restrict_author(query, %User{} = author) do
+    from([a, o] in query,
+      where: a.actor == ^author.ap_id
+    )
+  end
+
+  def maybe_restrict_author(query, _), do: query
+
   defp restrict_public(q) do
     from([a, o] in q,
       where: fragment("?->>'type' = 'Create'", a.data),
-      where: "https://www.w3.org/ns/activitystreams#Public" in a.recipients,
-      limit: 40
+      where: "https://www.w3.org/ns/activitystreams#Public" in a.recipients
     )
   end