Add task to test emails

lib/mix/tasks/pleroma/digest.ex

@@ -0,0 +1,34 @@
+defmodule Mix.Tasks.Pleroma.Digest do
+  use Mix.Task
+  alias Mix.Tasks.Pleroma.Common
+
+  @shortdoc "Manages digest emails"
+  @moduledoc """
+  Manages digest emails
+
+  ## Send digest email since given date (user registration date by default)
+  ignoring user activity status.
+
+  ``mix pleroma.digest test <nickname> <since_date>``
+
+  Example: ``mix pleroma.digest test donaldtheduck 2019-05-20``
+  """
+  def run(["test", nickname | opts]) do
+    Common.start_pleroma()
+
+    user = Pleroma.User.get_by_nickname(nickname)
+
+    last_digest_emailed_at =
+      with [date] <- opts,
+           {:ok, datetime} <- Timex.parse(date, "{YYYY}-{0M}-{0D}") do
+        datetime
+      else
+        _ -> user.inserted_at
+      end
+
+    patched_user = %{user | last_digest_emailed_at: last_digest_emailed_at}
+
+    :ok = Pleroma.DigestEmailWorker.run([patched_user])
+    Mix.shell().info("Digest email have been sent to #{nickname} (#{user.email})")
+  end
+end