gistfile1.rb

	def mail_subscribers(book, attrs = {})
		@book = book
		@body ||=attrs[:body]

		if attrs[:attachments] 
			puts attrs[:attachments] 
			attrs[:attachments].all? {
				|attachment|
				attachments[attachment[:filename]] = attachment[:content]
			}
		end
		mail(bcc: users.join(','), subject: attrs[:subject])
	end

	def self.deliver_mail_chapter(book, chapter_index, attrs = {})
		attachments = Array.new
		attachments.push({
				:filename => "myAttachment.txt",
				:content => "some content"
				})
		default_attrs = {
			:subject => "convert",
			:attachments => attachments
		}
		attrs = default_attrs.merge(attrs)
		mail_subscribers(book, attrs).deliver
	end