Contents

# frozen_string_literal: true

module DefraRubyEmail
  class LastEmailCache
    include Singleton

    EMAIL_ATTRIBUTES = %i[date from to bcc cc reply_to subject].freeze

    attr_accessor :last_email

    # This is necessary to properly test the service functionality
    def reset
      @last_email = nil
    end

    def last_email_json
      return JSON.generate(error: "No emails sent.") unless last_email.present?

      message_hash = {}
      EMAIL_ATTRIBUTES.each do |attribute|
        message_hash[attribute] = last_email.public_send(attribute)
      end
      message_hash[:body] = email_body
      message_hash[:attachments] = last_email.attachments.map(&:filename)

      JSON.generate(last_email: message_hash)
    end

    # If you've set multipart emails then you'll have both a text and a html
    # version (determined by adding the relevant erb views). If you do so then
    # `my_mail.parts.length` will at least equal 2. If you only have one of them
    # e.g. just a text version then parts doesn't get populated.
    #
    # However any attachments will cause ActionMailer to use parts. So for example
    # if we have a text only email with an attached image, then parts will be of
    # length 2; one being the content and the other being the attachment.
    #
    # To cater for all possibilities we have this method to grab the body content
    # https://guides.rubyonrails.org/action_mailer_basics.html#sending-multipart-emails
    # https://stackoverflow.com/a/15818886
    def email_body
      part_to_use = last_email.text_part || last_email.html_part || last_email

      # return the message body without the header information
      part_to_use.body.decoded
    end
  end
end

Version data entries

6 entries across 6 versions & 1 rubygems

Version	Path
defra_ruby_email-1.3.0	lib/defra_ruby_email/last_email_cache.rb
defra_ruby_email-1.2.0	lib/defra_ruby_email/last_email_cache.rb
defra_ruby_email-1.1.0	lib/defra_ruby_email/last_email_cache.rb
defra_ruby_email-1.0.0	lib/defra_ruby_email/last_email_cache.rb
defra_ruby_email-0.2.0	lib/defra_ruby_email/last_email_cache.rb
defra_ruby_email-0.1.0	lib/defra_ruby_email/last_email_cache.rb