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<?php
// This file is part of mod_grouptool for Moodle - http://moodle.org/
//
// It 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 3 of the License, or
// (at your option) any later version.
//
// It 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 Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Contains mod_grouptool's group resize form
*
* @package mod_grouptool
* @author Philipp Hager
* @copyright 2014 Academic Moodle Cooperation {@link http://www.academic-moodle-cooperation.org}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace mod_grouptool;
defined('MOODLE_INTERNAL') || die();
// Global variable $CFG is always set, but with this little wrapper PHPStorm won't give wrong error messages!
if (isset($CFG)) {
require_once($CFG->libdir . '/formslib.php');
require_once($CFG->dirroot . '/mod/grouptool/definitions.php');
require_once($CFG->dirroot . '/mod/grouptool/lib.php');
}
/**
* class representing the moodleform used when resizing groups
*
* @package mod_grouptool
* @author Philipp Hager
* @copyright 2014 Academic Moodle Cooperation {@link http://www.academic-moodle-cooperation.org}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class group_resize_form extends \moodleform {
/**
* Definition of resize form
*
* @throws \coding_exception
* @throws \dml_exception
*/
protected function definition() {
global $DB;
$mform = $this->_form;
$mform->addElement('hidden', 'id');
$mform->setDefault('id', $this->_customdata['id']);
$mform->setType('id', PARAM_INT);
$mform->addElement('hidden', 'instance');
$mform->setDefault('instance', $this->_customdata['instance']);
$mform->setType('instance', PARAM_INT);
$cm = get_coursemodule_from_instance('grouptool', $this->_customdata['instance']);
$course = $DB->get_record('course', ['id' => $cm->course]);
$group = $DB->get_record('groups', ['id' => $this->_customdata['resize']]);
$mform->addElement('hidden', 'tab');
$mform->setDefault('tab', 'group_admin');
$mform->setType('tab', PARAM_TEXT);
$mform->addElement('hidden', 'courseid');
$mform->setDefault('courseid', $course->id);
$mform->setType('courseid', PARAM_INT);
$mform->addElement('hidden', 'resize');
$mform->setType('resize', PARAM_INT);
$mform->setDefault('resize', $this->_customdata['resize']);
$mform->addElement('hidden', 'name');
$mform->setType('name', PARAM_TEXT);
$mform->setDefault('name', $group->name);
$mform->addElement('text', 'size', get_string('size'));
$mform->setType('size', PARAM_INT);
$mform->addElement('hidden', 'courseid');
$mform->setDefault('courseid', $course->id);
$mform->setType('courseid', PARAM_INT);
$grp = [];
$grp[] = $mform->createElement('submit', 'submit', get_string('savechanges'));
$grp[] = $mform->createElement('cancel');
$mform->addGroup($grp, 'actionbuttons', '', [' '], false);
$mform->setType('actionbuttons', PARAM_RAW);
}
/**
* Validation for resize form
* If there are errors return array of errors ("fieldname"=>"error message"),
* otherwise true if ok.
*
* @param array $data array of ("fieldname"=>value) of submitted data
* @param array $files array of uploaded files "element_name"=>tmp_file_path
* @return array of "element_name"=>"error_description" if there are errors,
* or an empty array if everything is OK.
* @throws \coding_exception
* @throws \dml_exception
*/
public function validation($data, $files) {
global $DB;
$errors = parent::validation($data, $files);
$sql = '
SELECT COUNT(reg.id) AS regcnt
FROM {grouptool_agrps} agrps
LEFT JOIN {grouptool_registered} reg ON reg.agrpid = agrps.id AND reg.modified_by >= 0
WHERE agrps.grouptoolid = :grouptoolid AND agrps.groupid = :groupid';
$params = ['grouptoolid' => $data['instance'], 'groupid' => $data['resize']];
$regs = $DB->count_records_sql($sql, $params);
if (($data['size'] != '') && (clean_param($data['size'], PARAM_INT) <= 0)) {
$errors['size'] = get_string('grpsizezeroerror', 'grouptool');
} else if (!empty($regs) && $data['size'] < $regs) {
$errors['size'] = get_string('toomanyregs', 'grouptool');
} else {
$DB->set_field('grouptool_agrps', 'grpsize', $data['size'],
['groupid' => $data['resize'], 'grouptoolid' => $data['instance']]);
if ($data['size'] != $DB->get_field('grouptool_agrps', 'grpsize', [
'groupid' => $data['resize'],
'grouptoolid' => $data['instance']
])) {
// Error happened...
$errors['size'] = get_string('couldnt_resize_group', 'grouptool', $data['size']);
}
}
return $errors;
}
}