+
+ @doc """
+ Deletes all users from an instance in a background task, thus also deleting
+ all of those users' activities and notifications.
+ """
+ def delete_users_and_activities(host) when is_binary(host) do
+ BackgroundWorker.enqueue("delete_instance", %{"host" => host})
+ end
+
+ def perform(:delete_instance, host) when is_binary(host) do
+ User.Query.build(%{nickname: "@#{host}"})
+ |> Repo.chunk_stream(100, :batches)
+ |> Stream.each(fn users ->
+ users
+ |> Enum.each(fn user ->
+ User.perform(:delete, user)
+ end)
+ end)
+ |> Stream.run()
+ end