1<?php
2/*
3        +-----------------------------------------------------------------------------+
4        | ILIAS open source                                                           |
5        +-----------------------------------------------------------------------------+
6        | Copyright (c) 1998-2006 ILIAS open source, University of Cologne            |
7        |                                                                             |
8        | This program is free software; you can redistribute it and/or               |
9        | modify it under the terms of the GNU General Public License                 |
10        | as published by the Free Software Foundation; either version 2              |
11        | of the License, or (at your option) any later version.                      |
12        |                                                                             |
13        | This program is distributed in the hope that it will be useful,             |
14        | but WITHOUT ANY WARRANTY; without even the implied warranty of              |
15        | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               |
16        | GNU General Public License for more details.                                |
17        |                                                                             |
18        | You should have received a copy of the GNU General Public License           |
19        | along with this program; if not, write to the Free Software                 |
20        | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
21        +-----------------------------------------------------------------------------+
22*/
23
24include_once('./Modules/Course/classes/class.ilCourseObjectiveResult.php');
25
26/**
27* Caches results for a specific user and course
28*
29* @author Stefan Meyer <smeyer.ilias@gmx.de>
30* @version $Id$
31*
32* @ingroup ModulesCourse
33*/
34class ilCourseObjectiveResultCache
35{
36    private static $suggested = null;
37    private static $status = null;
38
39
40    /**
41     * check if objective is suggested
42     *
43     * @access public
44     * @param int usr_id
45     * @param int course_id
46     * @return bool
47     * @static
48     */
49    public static function isSuggested($a_usr_id, $a_crs_id, $a_objective_id)
50    {
51        if (!is_array(self::$suggested[$a_usr_id][$a_crs_id])) {
52            self::$suggested[$a_usr_id][$a_crs_id] = self::readSuggested($a_usr_id, $a_crs_id);
53        }
54        return in_array($a_objective_id, self::$suggested[$a_usr_id][$a_crs_id]) ? true : false;
55    }
56
57    /**
58     * get status of user
59     *
60     * @access public
61     * @param int usr_id
62     * @param int crs_id
63     * @return
64     * @static
65     */
66    public static function getStatus($a_usr_id, $a_crs_id)
67    {
68        if (isset(self::$status[$a_usr_id][$a_crs_id])) {
69            return self::$status[$a_usr_id][$a_crs_id];
70        }
71        $tmp_res = new ilCourseObjectiveResult($a_usr_id);
72        return self::$status[$a_usr_id][$a_crs_id] = $tmp_res->getStatus($a_crs_id);
73    }
74
75
76    /**
77     * read suggested objectives
78     *
79     * @access protected
80     * @param
81     * @return
82     */
83    protected function readSuggested($a_usr_id, $a_crs_id)
84    {
85        return ilCourseObjectiveResult::_getSuggested($a_usr_id, $a_crs_id, self::getStatus($a_usr_id, $a_crs_id));
86    }
87}
88