Move caching to MobilizonWeb

lib/mobilizon_web/cache/activity_pub.ex

@@ -0,0 +1,70 @@
+defmodule MobilizonWeb.Cache.ActivityPub do
+  @moduledoc """
+  The ActivityPub related functions.
+  """
+
+  alias Mobilizon.{Actors, Events, Service}
+  alias Mobilizon.Actors.Actor
+  alias Mobilizon.Events.{Comment, Event}
+
+  @cache :activity_pub
+
+  @doc """
+  Gets a local actor by username.
+  """
+  @spec get_local_actor_by_name(String.t()) ::
+          {:commit, Actor.t()} | {:ignore, nil}
+  def get_local_actor_by_name(name) do
+    Cachex.fetch(@cache, "actor_" <> name, fn "actor_" <> name ->
+      case Actors.get_local_actor_by_name(name) do
+        %Actor{} = actor ->
+          {:commit, actor}
+
+        nil ->
+          {:ignore, nil}
+      end
+    end)
+  end
+
+  @doc """
+  Gets a public event by its UUID, with all associations loaded.
+  """
+  @spec get_public_event_by_uuid_with_preload(String.t()) ::
+          {:commit, Event.t()} | {:ignore, nil}
+  def get_public_event_by_uuid_with_preload(uuid) do
+    Cachex.fetch(@cache, "event_" <> uuid, fn "event_" <> uuid ->
+      case Events.get_public_event_by_uuid_with_preload(uuid) do
+        %Event{} = event ->
+          {:commit, event}
+
+        nil ->
+          {:ignore, nil}
+      end
+    end)
+  end
+
+  @doc """
+  Gets a comment by its UUID, with all associations loaded.
+  """
+  @spec get_comment_by_uuid_with_preload(String.t()) ::
+          {:commit, Comment.t()} | {:ignore, nil}
+  def get_comment_by_uuid_with_preload(uuid) do
+    Cachex.fetch(@cache, "comment_" <> uuid, fn "comment_" <> uuid ->
+      case Events.get_comment_from_uuid_with_preload(uuid) do
+        %Comment{} = comment ->
+          {:commit, comment}
+
+        nil ->
+          {:ignore, nil}
+      end
+    end)
+  end
+
+  @doc """
+  Gets a relay.
+  """
+  @spec get_relay :: {:commit, Actor.t()} | {:ignore, nil}
+  def get_relay do
+    Cachex.fetch(@cache, "relay_actor", &Service.ActivityPub.Relay.get_actor/0)
+  end
+end