Add an authenticated fetch route for members

If the member is remote, it redirects to original instance

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

lib/web/cache/activity_pub.ex

@@ -4,7 +4,7 @@ defmodule Mobilizon.Web.Cache.ActivityPub do
   """
 
   alias Mobilizon.{Actors, Discussions, Events, Posts, Resources, Todos, Tombstone}
-  alias Mobilizon.Actors.Actor
+  alias Mobilizon.Actors.{Actor, Member}
   alias Mobilizon.Discussions.{Comment, Discussion}
   alias Mobilizon.Events.Event
   alias Mobilizon.Federation.ActivityPub.Relay
@@ -174,6 +174,23 @@ defmodule Mobilizon.Web.Cache.ActivityPub do
     end)
   end
 
+  @doc """
+  Gets a member by its UUID, with all associations loaded.
+  """
+  @spec get_member_by_uuid_with_preload(String.t()) ::
+          {:commit, Todo.t()} | {:ignore, nil}
+  def get_member_by_uuid_with_preload(uuid) do
+    Cachex.fetch(@cache, "member_" <> uuid, fn "member_" <> uuid ->
+      case Actors.get_member(uuid) do
+        %Member{} = member ->
+          {:commit, member}
+
+        nil ->
+          {:ignore, nil}
+      end
+    end)
+  end
+
   @doc """
   Gets a relay.
   """

lib/web/cache/cache.ex

@@ -24,6 +24,7 @@ defmodule Mobilizon.Web.Cache do
   defdelegate get_resource_by_uuid_with_preload(uuid), to: ActivityPub
   defdelegate get_todo_list_by_uuid_with_preload(uuid), to: ActivityPub
   defdelegate get_todo_by_uuid_with_preload(uuid), to: ActivityPub
+  defdelegate get_member_by_uuid_with_preload(uuid), to: ActivityPub
   defdelegate get_post_by_slug_with_preload(slug), to: ActivityPub
   defdelegate get_discussion_by_slug_with_preload(slug), to: ActivityPub
   defdelegate get_relay, to: ActivityPub