Federate participations

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

lib/mobilizon_web/api/participations.ex

@@ -0,0 +1,24 @@
+defmodule MobilizonWeb.API.Participations do
+  @moduledoc """
+  Common API to join events and groups
+  """
+
+  alias Mobilizon.Actors.Actor
+  alias Mobilizon.Events.{Event, Participant}
+  alias Mobilizon.Service.ActivityPub
+  require Logger
+
+  @spec join(Event.t(), Actor.t()) :: {:ok, Participant.t()}
+  def join(%Event{id: event_id} = event, %Actor{id: actor_id} = actor) do
+    with {:error, :participant_not_found} <- Mobilizon.Events.get_participant(event_id, actor_id),
+         {:ok, activity, participant} <- ActivityPub.join(event, actor, true) do
+      {:ok, activity, participant}
+    end
+  end
+
+  def leave(%Event{} = event, %Actor{} = actor) do
+    with {:ok, activity, participant} <- ActivityPub.leave(event, actor, true) do
+      {:ok, activity, participant}
+    end
+  end
+end