require 'delegate' module ActionMailer # The ActionMailer::MessageDelivery class is used by # ActionMailer::Base when creating a new mailer. # MessageDelivery is a wrapper (+Delegator+ subclass) around a lazy # created Mail::Message. You can get direct access to the # Mail::Message, deliver the email or schedule the email to be sent # through Active Job. # # Notifier.welcome(User.first) # an ActionMailer::MessageDelivery object # Notifier.welcome(User.first).deliver_now # sends the email # Notifier.welcome(User.first).deliver_later # enqueue email delivery as a job through Active Job # Notifier.welcome(User.first).message # a Mail::Message object class MessageDelivery < Delegator def initialize(mailer, mail_method, *args) #:nodoc: @mailer = mailer @mail_method = mail_method @args = args end def __getobj__ #:nodoc: @obj ||= @mailer.send(:new, @mail_method, *@args).message end def __setobj__(obj) #:nodoc: @obj = obj end # Returns the Mail::Message object def message __getobj__ end # Enqueues the email to be delivered through Active Job. When the # job runs it will send the email using +deliver_now!+. That means # that the message will be sent bypassing checking +perform_deliveries+ # and +raise_delivery_errors+, so use with caution. # # Notifier.welcome(User.first).deliver_later! # Notifier.welcome(User.first).deliver_later!(wait: 1.hour) # Notifier.welcome(User.first).deliver_later!(wait_until: 10.hours.from_now) # # Options: # # * :wait - Enqueue the email to be delivered with a delay # * :wait_until - Enqueue the email to be delivered at (after) a specific date / time # * :queue - Enqueue the email on the specified queue def deliver_later!(options={}) enqueue_delivery :deliver_now!, options end # Enqueues the email to be delivered through Active Job. When the # job runs it will send the email using +deliver_now+. # # Notifier.welcome(User.first).deliver_later # Notifier.welcome(User.first).deliver_later(wait: 1.hour) # Notifier.welcome(User.first).deliver_later(wait_until: 10.hours.from_now) # # Options: # # * :wait - Enqueue the email to be delivered with a delay. # * :wait_until - Enqueue the email to be delivered at (after) a specific date / time. # * :queue - Enqueue the email on the specified queue. def deliver_later(options={}) enqueue_delivery :deliver_now, options end # Delivers an email without checking +perform_deliveries+ and +raise_delivery_errors+, # so use with caution. # # Notifier.welcome(User.first).deliver_now! # def deliver_now! message.deliver! end # Delivers an email: # # Notifier.welcome(User.first).deliver_now # def deliver_now message.deliver end private def enqueue_delivery(delivery_method, options={}) args = @mailer.name, @mail_method.to_s, delivery_method.to_s, *@args ActionMailer::DeliveryJob.set(options).perform_later(*args) end end end