feat: allow to filter events by local-only

In addition to internal (self + federated) and global (global external search engine), introduce the
self possibility

Closes #1322

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/mobilizon/actors/actors.ex

@@ -525,6 +525,7 @@ defmodule Mobilizon.Actors do
       Keyword.get(options, :radius),
       Keyword.get(options, :bbox)
     )
+    |> filter_by_local_only(Keyword.get(options, :local_only, false))
     |> actors_for_location(Keyword.get(options, :location), Keyword.get(options, :radius))
     |> events_for_bounding_box(Keyword.get(options, :bbox))
     |> filter_by_type(Keyword.get(options, :actor_type, :Group))
@@ -1418,6 +1419,13 @@ defmodule Mobilizon.Actors do
 
   defp maybe_join_address(query, _location, _radius, _bbox), do: query
 
+  @spec filter_by_local_only(Ecto.Queryable.t(), boolean()) :: Ecto.Query.t()
+  defp filter_by_local_only(query, true) do
+    where(query, [q], is_nil(q.domain))
+  end
+
+  defp filter_by_local_only(query, false), do: query
+
   @spec actors_for_location(Ecto.Queryable.t(), String.t(), integer()) :: Ecto.Query.t()
   defp actors_for_location(query, location, radius)
        when is_valid_string(location) and not is_nil(radius) do

lib/mobilizon/events/events.ex

@@ -581,6 +581,7 @@ defmodule Mobilizon.Events do
     |> events_for_bounding_box(args)
     |> filter_online(args)
     |> filter_draft()
+    |> filter_local(if Map.get(args, :local_only, nil) == true, do: true, else: nil)
     |> filter_local_or_from_followed_instances_events()
     |> filter_public_visibility()
     |> event_order(Map.get(args, :sort_by, :match_desc), search_string)