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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle 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.
//
// Moodle 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/>.
/**
* This file contains the cohort membership badge award criteria type class
*
* @package core
* @subpackage badges
* @copyright 2016 onwards Catalyst IT {@link https://www.catalyst.net.nz/}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @author Eugene Venter <eugene@catalyst.net.nz>
*/
defined('MOODLE_INTERNAL') || die();
require_once($CFG->dirroot.'/cohort/lib.php');
/**
* Badge award criteria -- award on cohort membership
*
* @package core
* @subpackage badges
* @copyright 2016 onwards Catalyst IT {@link https://www.catalyst.net.nz/}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @author Eugene Venter <eugene@catalyst.net.nz>
*/
class award_criteria_cohort extends award_criteria {
/* @var int $criteriatype Criteria [BADGE_CRITERIA_TYPE_COHORT] */
public $criteriatype = BADGE_CRITERIA_TYPE_COHORT;
/* @var string $required_param Required form param */
public $required_param = 'cohort';
/* @var array $optional_params Optional form params */
public $optional_params = array();
/**
* Get criteria details for displaying to users
* @param string $short Print short version of criteria
* @return string
*/
public function get_details($short = '') {
global $DB, $OUTPUT;
$output = array();
foreach ($this->params as $p) {
$cohortname = $DB->get_field('cohort', 'name', array('id' => $p['cohort']));
if (!$cohortname) {
$str = $OUTPUT->error_text(get_string('error:nosuchcohort', 'badges'));
} else {
$str = html_writer::tag('b', '"' . format_string($cohortname, true) . '"');
}
$output[] = $str;
}
if ($short) {
return implode(', ', $output);
} else {
return html_writer::alist($output, array(), 'ul');
}
}
/**
* Add appropriate new criteria options to the form
*
* @param object $mform moodle form
*/
public function get_options(&$mform) {
global $DB;
$none = false;
$mform->addElement('header', 'first_header', $this->get_title());
$mform->addHelpButton('first_header', 'criteria_' . $this->criteriatype, 'badges');
// Get cohorts.
$cohorts = $DB->get_records_menu('cohort', array(), 'name ASC', 'id, name');
if (!empty($cohorts)) {
$select = array();
$selected = array();
foreach ($cohorts as $cid => $cohortname) {
$select[$cid] = format_string($cohortname, true);
}
if ($this->id !== 0) {
$selected = array_keys($this->params);
}
$settings = array('multiple' => 'multiple', 'size' => 20, 'class' => 'selectcohort');
$mform->addElement('select', 'cohort_cohorts', get_string('addcohort', 'badges'), $select, $settings);
$mform->addRule('cohort_cohorts', get_string('requiredcohort', 'badges'), 'required');
$mform->addHelpButton('cohort_cohorts', 'addcohort', 'badges');
if ($this->id !== 0) {
$mform->setDefault('cohort_cohorts', $selected);
}
} else {
$mform->addElement('static', 'nocohorts', '', get_string('error:nocohorts', 'badges'));
$none = true;
}
// Add aggregation.
if (!$none) {
$mform->addElement('header', 'aggregation', get_string('method', 'badges'));
$agg = array();
$agg[] =& $mform->createElement('radio', 'agg', '', get_string('allmethodcohort', 'badges'), 1);
$agg[] =& $mform->createElement('radio', 'agg', '', get_string('anymethodcohort', 'badges'), 2);
$mform->addGroup($agg, 'methodgr', '', array('<br/>'), false);
if ($this->id !== 0) {
$mform->setDefault('agg', $this->method);
} else {
$mform->setDefault('agg', BADGE_CRITERIA_AGGREGATION_ANY);
}
}
return array($none, get_string('noparamstoadd', 'badges'));
}
/**
* Save criteria records
*
* @param array $params Values from the form or any other array.
*/
public function save($params = array()) {
$cohorts = $params['cohort_cohorts'];
unset($params['cohort_cohorts']);
foreach ($cohorts as $cohortid) {
$params["cohort_{$cohortid}"] = $cohortid;
}
parent::save($params);
}
/**
* Review this criteria and decide if it has been completed
*
* @param int $userid User whose criteria completion needs to be reviewed.
* @param bool $filtered An additional parameter indicating that user list
* has been reduced and some expensive checks can be skipped.
*
* @return bool Whether criteria is complete.
*/
public function review($userid, $filtered = false) {
global $DB;
$overall = false;
foreach ($this->params as $param) {
$cohort = $DB->get_record('cohort', array('id' => $param['cohort']));
// Extra check in case a cohort was deleted while badge is still active.
if (!$cohort) {
if ($this->method == BADGE_CRITERIA_AGGREGATION_ALL) {
return false;
} else {
continue;
}
}
if ($this->method == BADGE_CRITERIA_AGGREGATION_ALL) {
if (cohort_is_member($cohort->id, $userid)) {
$overall = true;
continue;
} else {
return false;
}
} else if ($this->method == BADGE_CRITERIA_AGGREGATION_ANY) {
if (cohort_is_member($cohort->id, $userid)) {
return true;
} else {
$overall = false;
continue;
}
}
}
return $overall;
}
/**
* Checks criteria for any major problems.
*
* @return array A list containing status and an error message (if any).
*/
public function validate() {
global $DB;
$params = array_keys($this->params);
$method = ($this->method == BADGE_CRITERIA_AGGREGATION_ALL);
$singleparam = (count($params) == 1);
foreach ($params as $param) {
// Perform check if there only one parameter with any type of aggregation,
// Or there are more than one parameter with aggregation ALL.
if (($singleparam || $method) && !$DB->record_exists('cohort', array('id' => $param))) {
return array(false, get_string('error:invalidparamcohort', 'badges'));
}
}
return array(true, '');
}
/**
* Returns array with sql code and parameters returning all ids
* of users who meet this particular criterion.
*
* @return array list($join, $where, $params)
*/
public function get_completed_criteria_sql() {
$join = '';
$where = '';
$params = array();
if ($this->method == BADGE_CRITERIA_AGGREGATION_ANY) {
// User is a member of ANY of the specified cohorts.
$join = " LEFT JOIN {cohort_members} cm ON cm.userid = u.id";
$where = "AND (";
$i = 0;
foreach ($this->params as $param) {
if ($i == 0) {
$where .= ' cm.cohortid = :cohortid'.$i;
} else {
$where .= ' OR cm.cohortid = :cohortid'.$i;
}
$params['cohortid'.$i] = $param['cohort'];
$i++;
}
$where .= ") ";
return array($join, $where, $params);
} else {
// User is a member of ALL of the specified cohorts.
$join = " LEFT JOIN {cohort_members} cm ON cm.userid = u.id";
$i = 0;
foreach ($this->params as $param) {
$i++;
$where = ' AND cm.cohortid = :cohortid'.$i;
$params['cohortid'.$i] = $param['cohort'];
}
return array($join, $where, $params);
}
}
}