You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: email.rb
    path of file: ./repos/staytus/lib/staytus
    
    the code of the file until where you have to start completion: module Staytus
  class Email

    class << self

      #
      # Send an email to the given recipient
      #
      def deliver(subscriber, template, attributes = {})
        original_zone = Time.zone
    
    
      def deliver(subscriber, template, attributes = {})
        original_zone = Time.zone
        Time.zone = Site.first.time_zone
        mail = Mail.new
        mail.to         subscriber.email_address
        mail.from       "#{from_name} <#{from_address}>"
        mail.subject    self.subject_for(template, attributes.merge(:subscriber => subscriber))

        # Generate and set the plain text version of this message
        plain_text = self.body_for(template, attributes.merge(:subscriber => subscriber))
        mail.text_part do
          body plain_text
        end

        # Convert the plain text message into HTML
        markdown = Redcarpet::Markdown.new(Redcarpet::Render::HTML)
        content_html = markdown.render(plain_text)

        # Get the HTML template and generate a final HTML message
        template_html = File.read(File.join(Staytus::Config.theme_root, 'views', 'email.html'))
        final_html = Florrick.convert(template_html, add_default_attributes(:content => content_html).merge(:subscriber => subscriber))

        # Pass the HTML through premailer to add inline CSS
        premailer = Premailer.new(final_html, :with_html_string => true)
        final_html = premailer.to_inline_css

        # Add the final html to the message
        mail.html_part do
          body final_html
        end

        mail.deliver
        mail
      ensure
        Time.zone = original_zone
      end