<?php

/**
 * 
 * Copyright (C) 2007  IVLOS
 * 
 * This file is part of PDF Annotation Engine.
 * 
 * PDF Annotation Engine 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.
 * 
 * PDF Annotation Engine 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.
 * 
 * You should have received a copy of the GNU General Public License
 * along with PDF Annotation Engine.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * PDF Annotation Engine was originaly made by Infi, The Netherlands.
 * 
 * If you have any questions or suggestions, mail us at hide@address.com
 * 
 **/

class group extends crud_db {
	// regular methods
	
	function check_owner() {
		$course = $this->get_course();
		return $course->check_owner();
	}	
	
	function get_users() {
		global $db;
		
		$sql = 'SELECT user.* FROM user INNER JOIN user_group ON(user.id = user_group.user_id) WHERE user_group.group_id = ?';
		$data = array($this->id);
		
		$result = $db->getAll($sql, $data);
		
		return crud_db::from_result($result, 'user');
	}
	
	function delete() {
		$documents = $this->get_documents();
		
		foreach($documents as $document) {
			$document->delete();
		}
		
		return parent::delete(__CLASS__);
	}
	
	function get_documents() {
		return document::select(array('group_id' => $this->id));
	}
	
	function check_create() {
		return ($this->create_ok == 'true');
	}
	
	function contains($user_id) {
		$rows = $this->get_all(array('group_id' => $this->id, 'user_id' => $user_id), 'user_group', false);
		
		return isset($rows[0]['group_id']);
	}
	
	function add_user($user_id) {
		return $this->auto_insert(array('group_id' => $this->id, 'user_id' => $user_id), 'user_group');
	}
	
	function del_user($user_id) {
		return $this->auto_delete(array('group_id' => $this->id, 'user_id' => $user_id), 'user_group');
	}
	
	function get_course()
	{
		return course::from_id($this->course_id);
	}
	
	// inherited static methods

	function from_row($row) {
		return parent::from_row($row, __CLASS__);
	}
	
	function from_values($values) {
		return parent::from_values($values, __CLASS__);
	}
	
	function array_from_id($id) {
		return parent::array_from_id($id, __CLASS__);
	}
	
	function from_id($id) {
		return parent::from_id($id, __CLASS__);
	}

	function select($filter=array()) {
		return parent::select($filter, __CLASS__);
	}
	
	function assoc_list($field, $filter=array()) {
		return parent::assoc_list($field, $filter, __CLASS__);
	}
	
	// inherited regular methods

	function update() {
		return parent::update(__CLASS__);
	}
	
	function insert() {
		return parent::insert(__CLASS__);
	}
}