group/autogroup_form.php

   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  * Auto group form
  20  *
  21  * @package    core_group
  22  * @copyright  2007 mattc-catalyst (http://moodle.com)
  23  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24  */
  25 if (!defined('MOODLE_INTERNAL')) {
  26     die('Direct access to this script is forbidden.');    ///  It must be included from a Moodle page
  27 }
  28
  29 require_once($CFG->dirroot.'/lib/formslib.php');
  30 require_once($CFG->dirroot.'/cohort/lib.php');
  31
  32 /**
  33  * Auto group form class
  34  *
  35  * @package    core_group
  36  * @copyright  2007 mattc-catalyst (http://moodle.com)
  37  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  38  */
  39 class autogroup_form extends moodleform {
  40
  41     /**
  42      * Form Definition
  43      */
  44     function definition() {
  45         global $CFG, $COURSE;
  46
  47         $mform =& $this->_form;
  48
  49         $mform->addElement('header', 'autogroup', get_string('general'));
  50
  51         $mform->addElement('text', 'namingscheme', get_string('namingscheme', 'group'));
  52         $mform->addHelpButton('namingscheme', 'namingscheme', 'group');
  53         $mform->addRule('namingscheme', get_string('required'), 'required', null, 'client');
  54         $mform->setType('namingscheme', PARAM_TEXT);
  55         // There must not be duplicate group names in course.
  56         $template = get_string('grouptemplate', 'group');
  57         $gname = groups_parse_name($template, 0);
  58         if (!groups_get_group_by_name($COURSE->id, $gname)) {
  59             $mform->setDefault('namingscheme', $template);
  60         }
  61
  62         $options = array('groups' => get_string('numgroups', 'group'),
  63                          'members' => get_string('nummembers', 'group'));
  64         $mform->addElement('select', 'groupby', get_string('groupby', 'group'), $options);
  65
  66         $mform->addElement('text', 'number', get_string('number', 'group'),'maxlength="4" size="4"');
  67         $mform->setType('number', PARAM_INT);
  68         $mform->addRule('number', null, 'numeric', null, 'client');
  69         $mform->addRule('number', get_string('required'), 'required', null, 'client');
  70
  71         $mform->addElement('header', 'groupmembershdr', get_string('groupmembers', 'group'));
  72         $mform->setExpanded('groupmembershdr', true);
  73
  74         $options = array(0=>get_string('all'));
  75         $options += $this->_customdata['roles'];
  76         $mform->addElement('select', 'roleid', get_string('selectfromrole', 'group'), $options);
  77
  78         $student = get_archetype_roles('student');
  79         $student = reset($student);
  80
  81         if ($student and array_key_exists($student->id, $options)) {
  82             $mform->setDefault('roleid', $student->id);
  83         }
  84
  85         if ($cohorts = cohort_get_available_cohorts(context_course::instance($COURSE->id), COHORT_WITH_ENROLLED_MEMBERS_ONLY, 0, 0)) {
  86             $options = array(0 => get_string('anycohort', 'cohort'));
  87             foreach ($cohorts as $c) {
  88                 $options[$c->id] = format_string($c->name, true, context::instance_by_id($c->contextid));
  89             }
  90             $mform->addElement('select', 'cohortid', get_string('selectfromcohort', 'cohort'), $options);
  91             $mform->setDefault('cohortid', '0');
  92         } else {
  93             $mform->addElement('hidden','cohortid');
  94             $mform->setType('cohortid', PARAM_INT);
  95             $mform->setConstant('cohortid', '0');
  96         }
  97
  98         if ($groupings = groups_get_all_groupings($COURSE->id)) {
  99             $options = array();
 100             $options[0] = get_string('none');
 101             foreach ($groupings as $grouping) {
 102                 $options[$grouping->id] = format_string($grouping->name);
 103             }
 104             $mform->addElement('select', 'groupingid', get_string('selectfromgrouping', 'group'), $options);
 105             $mform->setDefault('groupingid', 0);
 106             $mform->disabledIf('groupingid', 'notingroup', 'checked');
 107         } else {
 108             $mform->addElement('hidden', 'groupingid');
 109             $mform->setType('groupingid', PARAM_INT);
 110             $mform->setConstant('groupingid', 0);
 111         }
 112
 113         if ($groups = groups_get_all_groups($COURSE->id)) {
 114             $options = array();
 115             $options[0] = get_string('none');
 116             foreach ($groups as $group) {
 117                 $options[$group->id] = format_string($group->name);
 118             }
 119             $mform->addElement('select', 'groupid', get_string('selectfromgroup', 'group'), $options);
 120             $mform->setDefault('groupid', 0);
 121             $mform->disabledIf('groupid', 'notingroup', 'checked');
 122         } else {
 123             $mform->addElement('hidden', 'groupid');
 124             $mform->setType('groupid', PARAM_INT);
 125             $mform->setConstant('groupid', 0);
 126         }
 127
 128         $options = array('no'        => get_string('noallocation', 'group'),
 129                          'random'    => get_string('random', 'group'),
 130                          'firstname' => get_string('byfirstname', 'group'),
 131                          'lastname'  => get_string('bylastname', 'group'),
 132                          'idnumber'  => get_string('byidnumber', 'group'));
 133         $mform->addElement('select', 'allocateby', get_string('allocateby', 'group'), $options);
 134         $mform->setDefault('allocateby', 'random');
 135
 136         $mform->addElement('checkbox', 'nosmallgroups', get_string('nosmallgroups', 'group'));
 137         $mform->disabledIf('nosmallgroups', 'groupby', 'noteq', 'members');
 138
 139         $mform->addElement('checkbox', 'notingroup', get_string('notingroup', 'group'));
 140         $mform->disabledIf('notingroup', 'groupingid', 'neq', 0);
 141         $mform->disabledIf('notingroup', 'groupid', 'neq', 0);
 142
 143         $mform->addElement('header', 'groupinghdr', get_string('grouping', 'group'));
 144
 145         $options = array('0' => get_string('nogrouping', 'group'),
 146                          '-1'=> get_string('newgrouping', 'group'));
 147         if ($groupings = groups_get_all_groupings($COURSE->id)) {
 148             foreach ($groupings as $grouping) {
 149                 $options[$grouping->id] = strip_tags(format_string($grouping->name));
 150             }
 151         }
 152         $mform->addElement('select', 'grouping', get_string('createingrouping', 'group'), $options);
 153         if ($groupings) {
 154             $mform->setDefault('grouping', '-1');
 155         }
 156
 157         $mform->addElement('text', 'groupingname', get_string('groupingname', 'group'), $options);
 158         $mform->setType('groupingname', PARAM_TEXT);
 159         $mform->disabledIf('groupingname', 'grouping', 'noteq', '-1');
 160
 161         $mform->addElement('hidden','courseid');
 162         $mform->setType('courseid', PARAM_INT);
 163
 164         $mform->addElement('hidden','seed');
 165         $mform->setType('seed', PARAM_INT);
 166
 167         $buttonarray = array();
 168         $buttonarray[] = &$mform->createElement('submit', 'preview', get_string('preview'));
 169         $buttonarray[] = &$mform->createElement('submit', 'submitbutton', get_string('submit'));
 170         $buttonarray[] = &$mform->createElement('cancel');
 171         $mform->addGroup($buttonarray, 'buttonar', '', array(' '), false);
 172         $mform->closeHeaderBefore('buttonar');
 173     }
 174
 175     /**
 176      * Performs validation of the form information
 177      *
 178      * @param array $data
 179      * @param array $files
 180      * @return array $errors An array of $errors
 181      */
 182     function validation($data, $files) {
 183         global $CFG, $COURSE;
 184         $errors = parent::validation($data, $files);
 185
 186         if ($data['allocateby'] != 'no') {
 187             $source = array();
 188             if ($data['cohortid']) {
 189                 $source['cohortid'] = $data['cohortid'];
 190             }
 191             if ($data['groupingid']) {
 192                 $source['groupingid'] = $data['groupingid'];
 193             }
 194             if ($data['groupid']) {
 195                 $source['groupid'] = $data['groupid'];
 196             }
 197             if (!$users = groups_get_potential_members($data['courseid'], $data['roleid'], $source)) {
 198                 $errors['roleid'] = get_string('nousersinrole', 'group');
 199             }
 200
 201            /// Check the number entered is sane
 202             if ($data['groupby'] == 'groups') {
 203                 $usercnt = count($users);
 204
 205                 if ($data['number'] > $usercnt || $data['number'] < 1) {
 206                     $errors['number'] = get_string('toomanygroups', 'group', $usercnt);
 207                 }
 208             }
 209         }
 210
 211         //try to detect group name duplicates
 212         $name = groups_parse_name(trim($data['namingscheme']), 0);
 213         if (groups_get_group_by_name($COURSE->id, $name)) {
 214             $errors['namingscheme'] = get_string('groupnameexists', 'group', $name);
 215         }
 216
 217         // check grouping name duplicates
 218         if ( isset($data['grouping']) && $data['grouping'] == '-1') {
 219             $name = trim($data['groupingname']);
 220             if (empty($name)) {
 221                 $errors['groupingname'] = get_string('required');
 222             } else if (groups_get_grouping_by_name($COURSE->id, $name)) {
 223                 $errors['groupingname'] = get_string('groupingnameexists', 'group', $name);
 224             }
 225         }
 226
 227        /// Check the naming scheme
 228         if ($data['groupby'] == 'groups' and $data['number'] == 1) {
 229             // we can use the name as is because there will be only one group max
 230         } else {
 231             $matchcnt = preg_match_all('/[#@]{1,1}/', $data['namingscheme'], $matches);
 232             if ($matchcnt != 1) {
 233                 $errors['namingscheme'] = get_string('badnamingscheme', 'group');
 234             }
 235         }
 236
 237         return $errors;
 238     }
 239 }