module Mailer

# File lib/volt/mailer/mailer.rb, line 7
def self.deliver(view_path, attrs, volt_app=nil)
  volt_app ||= $volt_app

  attrs = attrs.symbolize_keys

  raise ":to must be supplied when delivering e-mail" unless attrs[:to]

  subject = Volt::PathStringRenderer.new(volt_app, "#{view_path}/subject", attrs).html

  text = begin
    Volt::PathStringRenderer.new(volt_app, "#{view_path}/text", attrs).html
  rescue Volt::ViewLookupException => e
    nil
  end

  html = begin
    Volt::PathStringRenderer.new(volt_app, "#{view_path}/html", attrs).html
  rescue Volt::ViewLookupException => e
    nil
  end

  if !text && !html
    raise "No text or html version of the e-mail supplied in #{view_path}"
  end

  # If no html version is supplied, use the text version.
  html ||= "<pre>#{text}</pre>"

  attrs[:subject] = subject
  attrs[:html_body] = html
  attrs[:body] = text

  # Merge attrs into a copy of the mailer options
  attrs = Volt.config.mailer.to_h.dup.merge(attrs) if Volt.config.mailer

  allowed_opts = Pony.permissable_options

  pony_options = attrs.select {|k,v| allowed_opts.include?(k.to_sym) }

  # Send the e-mail
  Pony.mail(pony_options)
end