#
# Send a publication email whenever an elt is saved
#
# Important:
# the bcc, which is actually used for sending, is setup in the Mail class
#
class MailNotify < ActionMailer::Base
	def publish(elt)
		@subject = elt.subject
		# Try to render the element as html
		#@body = elt.body
		@body[:elt] = elt

		@recipients = (mailing_list(elt.parent).subject.blank? ? '' : mailing_list(elt.parent).subject ) \
			+ ' <' \
			+ mailing_list(elt.parent).id + '@' + ActionMailer::Base.server_settings[:domain] \
			+ '>'

		@from = ((elt.person and elt.person.name) ? elt.person.name : ANONYMOUS_POSTER) \
			+ ' <' \
			+ ((elt.person and elt.person.email) \
				? elt.person.email : ANONYMOUS_POSTER + '@' + ActionMailer::Base.server_settings[:domain]) \
			+ '> '

		# This is the essential of a mailing list, you reply to the mailing list,
		# where every body sends their mail.
		# This very mail can be a mailing list all by itself...
		@headers['Reply-to'] = mailing_list(elt).id + '@' + ActionMailer::Base.server_settings[:domain]

		@headers['In-Reply-To'] = elt.parent.mail.message if elt.parent \
			and elt.parent.mail and elt.parent.mail.message

		@sent_on = elt.created_on

		parentMsg = elt.parent.mail
		if parentMsg
			@headers['references'] = ''
			@headers['references'] << parentMsg.mail_parents if parentMsg.mail_parents
			@headers['references'] << parentMsg.message if parentMsg.message
		end

		@content_type = 'multipart/alternative'

		@headers['X-Mailer'] = ActionMailer::Base.server_settings[:domain] + " v" + PARLEMENT_VERSION
	end

	private

	#
	# Try to fine, define, the mailing list id this elt is part of
	#
	# The algo used is simple: find a parent id smaller than the usually auto
	# generated ids
	#
	def mailing_list(elt)
		e = elt
		while e.id.size > 21 and e.parent_id != 'ROOT'
			e = e.parent
		end
		e
	end
end