dcadenas/gmail_sender

require 'base64'
require 'tls_smtp_patch'
require 'gmail_sender/message_stream_writer'
require 'gmail_sender/utils'
require 'gmail_sender/error'

class GmailSender
  def initialize(user_or_email, password, net_smtp_class = Net::SMTP, message_stream_writer_class = MessageStreamWriter)
    user, domain = user_or_email.split("@")
    @sender_domain = domain || "gmail.com"
    @sender_email = "#{user}@#{@sender_domain}"
    @sender_password = password

    @net_smtp = net_smtp_class.new("smtp.gmail.com", 587)
    @net_smtp.enable_starttls

    @message_stream_writer = message_stream_writer_class.new(@sender_email)
  end

  def attach(file)
    @message_stream_writer.attachments << file if File.exist?(file)
  end

 def send(options = {})
    raise(Error, "Missing receiver (:to => 'someone@somehost.com')") if Utils.blank?(options[:to])
    to = [options[:to]].flatten
    subject = options[:subject] || ""
    content = options[:content] || ""
    content_type = options[:content_type] || 'text/plain; charset=UTF-8'

    @net_smtp.start(@sender_domain, @sender_email, @sender_password, :plain) do |smtp|
      smtp.open_message_stream(@sender_email, to) do |msg_stream|
        @message_stream_writer.write(msg_stream, to, subject, content, content_type)
      end
    end
  end
end