1<?php
2// This file is part of Moodle - http://moodle.org/
3//
4// Moodle is free software: you can redistribute it and/or modify
5// it under the terms of the GNU General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8//
9// Moodle is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13//
14// You should have received a copy of the GNU General Public License
15// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
16
17
18/**
19 * A form for creating and editing groupings.
20 *
21 * @copyright 2006 The Open University, N.D.Freear AT open.ac.uk, J.White AT open.ac.uk
22 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
23 * @package   core_group
24 */
25
26if (!defined('MOODLE_INTERNAL')) {
27    die('Direct access to this script is forbidden.');    ///  It must be included from a Moodle page
28}
29
30require_once($CFG->dirroot.'/lib/formslib.php');
31
32/**
33 * Grouping form class
34 *
35 * @copyright 2006 The Open University, N.D.Freear AT open.ac.uk, J.White AT open.ac.uk
36 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
37 * @package   core_group
38 */
39class grouping_form extends moodleform {
40
41    /**
42     * Form definition
43     */
44    function definition () {
45        global $USER, $CFG, $COURSE;
46        $coursecontext = context_course::instance($COURSE->id);
47
48        $mform =& $this->_form;
49        $editoroptions = $this->_customdata['editoroptions'];
50
51        $mform->addElement('header', 'general', get_string('general', 'form'));
52
53        $mform->addElement('text','name', get_string('groupingname', 'group'),'maxlength="254" size="50"');
54        $mform->addRule('name', get_string('required'), 'required', null, 'server');
55        $mform->setType('name', PARAM_TEXT);
56
57        $mform->addElement('text','idnumber', get_string('idnumbergrouping'), 'maxlength="100" size="10"');
58        $mform->addHelpButton('idnumber', 'idnumbergrouping');
59        $mform->setType('idnumber', PARAM_RAW);
60        if (!has_capability('moodle/course:changeidnumber', $coursecontext)) {
61            $mform->hardFreeze('idnumber');
62        }
63
64        $mform->addElement('editor', 'description_editor', get_string('groupingdescription', 'group'), null, $editoroptions);
65        $mform->setType('description_editor', PARAM_RAW);
66
67        $mform->addElement('hidden','id');
68        $mform->setType('id', PARAM_INT);
69
70        $mform->addElement('hidden', 'courseid');
71        $mform->setType('courseid', PARAM_INT);
72
73        $this->add_action_buttons();
74    }
75
76    /**
77     * Form validation
78     *
79     * @param array $data
80     * @param array $files
81     * @return array $errors An array of validataion errors for the form.
82     */
83    function validation($data, $files) {
84        global $COURSE, $DB;
85
86        $errors = parent::validation($data, $files);
87
88        $name = trim($data['name']);
89        if (isset($data['idnumber'])) {
90            $idnumber = trim($data['idnumber']);
91        } else {
92            $idnumber = '';
93        }
94        if ($data['id'] and $grouping = $DB->get_record('groupings', array('id'=>$data['id']))) {
95            if (core_text::strtolower($grouping->name) != core_text::strtolower($name)) {
96                if (groups_get_grouping_by_name($COURSE->id,  $name)) {
97                    $errors['name'] = get_string('groupingnameexists', 'group', $name);
98                }
99            }
100            if (!empty($idnumber) && $grouping->idnumber != $idnumber) {
101                if (groups_get_grouping_by_idnumber($COURSE->id, $idnumber)) {
102                    $errors['idnumber']= get_string('idnumbertaken');
103                }
104            }
105
106        } else if (groups_get_grouping_by_name($COURSE->id, $name)) {
107            $errors['name'] = get_string('groupingnameexists', 'group', $name);
108        } else if (!empty($idnumber) && groups_get_grouping_by_idnumber($COURSE->id, $idnumber)) {
109            $errors['idnumber']= get_string('idnumbertaken');
110        }
111
112        return $errors;
113    }
114
115}
116