after.rb

  def update_discussion_with_client( author, client, document, message )

    email_vars = {
      :locale       => client.locale,
      :job_ref      => document.ref,
      :message      => message,
      :job_link     => render_link(review_clients_project_path(id: document.project_id), client.locale) # I cannot find the route to open a document for review from the client's perspective
    }

    base_mail(
      receiver: client,
      template: "job-discussion-updated",
      sender: ->(country_code) { "TextMaster #{country_code} <[email protected]>" },
      template_vars: email_vars
    )
  end

  def base_mail(options)
    receiver = options.fetch :receiver
    template = options.fetch :template
    template_vars = options.fetch :template_vars
    sender  = options.fetch :sender

    @locale    = receiver.locale
    country_code = CustomData.get_country_code(@locale).upcase unless @locale.nil?
    email_from   = sender.call(country_code)
    
    set_headers(email_from)
    @title     = render_email_title(template, template_vars)
    @content   = render_email_content(template, template_vars)

    templatize_email
    set_user_variables(receiver)  #set %greetings, %signature, %home_title, etc. variables

    mail(:from    => email_from,
         :to      => receiver.email,
         :subject => @title)
  end

initial.rb

  def update_discussion_with_client( author, client, document, message )
    @locale      = client.locale
    country_code = CustomData.get_country_code(@locale).upcase unless @locale.nil?
    email_from   = "TextMaster #{country_code} <[email protected]>"

    set_headers(email_from)

    @email_vars = {
      :locale       => @locale,
      :job_ref      => document.ref,
      :message      => message,
      :job_link     => render_link(review_clients_project_path(id: document.project_id), @locale) # I cannot find the route to open a document for review from the client's perspective
    }

    @title   = render_email_title("job-discussion-updated", @email_vars)
    @content = render_email_content("job-discussion-updated", @email_vars)

    templatize_email #use default email template
    set_user_variables(client)  #set %greetings, %signature, %home_title, etc. variables

    mail(:from    => email_from,
         :to      => client.email,
         :subject => @title)
  end