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module EmailHelper
  def email_image_tag(image, **options)
    attachments[image] = File.read(Rails.root.join("app/assets/images/#{image}"))
    image_tag attachments[image].url, **options
  end
end

class ApplicationMailer < ActionMailer::Base
  default from: Setting.first.email_from
  add_template_helper(EmailHelper)
  layout 'mailer'
end