# Engenharia de Software 2007.1
# Copyright (C) 2007, Adriano, Alinson, Andre, Rafael e Bustamante
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

class Message < ActiveRecord::Base
	acts_as_paranoid
	belongs_to :user,   :foreign_key => "sender_id"
end


class PrivateMessage < Message
end


class News < Message
	validates_presence_of :title
	belongs_to :course, :foreign_key => "receiver_id"
end


class ShoutboxMessage < Message
end


class CourseShoutboxMessage < ShoutboxMessage
end


class UserShoutboxMessage < ShoutboxMessage
end