Send an email to the user when a recording is done processing

Had to add an email attribute to users to store their email to send the
notification. Will only send it for user rooms since they are the only
ones we know who to notify.

app/jobs/recording_ready_email_job.rb

@@ -0,0 +1,25 @@
+# BigBlueButton open source conferencing system - http://www.bigbluebutton.org/.
+#
+# Copyright (c) 2016 BigBlueButton Inc. and by respective authors (see below).
+#
+# This program is free software; you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free Software
+# Foundation; either version 3.0 of the License, or (at your option) any later
+# version.
+#
+# BigBlueButton is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
+
+class RecordingReadyEmailJob < ApplicationJob
+  queue_as :default
+
+  def perform(user)
+    if user.email.present?
+      NotificationMailer.recording_ready_email(user).deliver
+    end
+  end
+end