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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/>.
/**
* User selector.
*
* @package core_role
* @copyright 1999 onwards Martin Dougiamas (http://dougiamas.com)
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
require_once($CFG->dirroot.'/user/selector/lib.php');
/**
* User selector subclass for the selection of users in the check permissions page.
*
* @copyright 2012 Petr Skoda {@link http://skodak.org}
*/
class core_role_check_users_selector extends user_selector_base {
/** @var bool limit listing of users to enrolled only */
protected $onlyenrolled;
/**
* Constructor.
*
* @param string $name the control name/id for use in the HTML.
* @param array $options other options needed to construct this selector.
* You must be able to clone a userselector by doing new get_class($us)($us->get_name(), $us->get_options());
*/
public function __construct($name, $options) {
if (!isset($options['multiselect'])) {
$options['multiselect'] = false;
}
parent::__construct($name, $options);
$coursecontext = $this->accesscontext->get_course_context(false);
if ($coursecontext and $coursecontext->id != SITEID and !has_capability('moodle/role:manage', $coursecontext)) {
// Prevent normal teachers from looking up all users.
$this->onlyenrolled = true;
} else {
$this->onlyenrolled = false;
}
}
public function find_users($search) {
global $DB;
list($wherecondition, $params) = $this->search_sql($search, 'u');
$fields = 'SELECT ' . $this->required_fields_sql('u');
$countfields = 'SELECT COUNT(1)';
$coursecontext = $this->accesscontext->get_course_context(false);
if ($coursecontext and $coursecontext != SITEID) {
$sql1 = " FROM {user} u
JOIN (SELECT DISTINCT subu.id
FROM {user} subu
JOIN {user_enrolments} ue ON (ue.userid = subu.id)
JOIN {enrol} e ON (e.id = ue.enrolid AND e.courseid = :courseid1)
) subq ON subq.id = u.id
WHERE $wherecondition";
$params['courseid1'] = $coursecontext->instanceid;
if ($this->onlyenrolled) {
$sql2 = null;
} else {
$sql2 = " FROM {user} u
LEFT JOIN ({user_enrolments} ue
JOIN {enrol} e ON (e.id = ue.enrolid AND e.courseid = :courseid2)) ON (ue.userid = u.id)
WHERE $wherecondition
AND ue.id IS NULL";
$params['courseid2'] = $coursecontext->instanceid;
}
} else {
if ($this->onlyenrolled) {
// Bad luck, current user may not view only enrolled users.
return array();
}
$sql1 = null;
$sql2 = " FROM {user} u
WHERE $wherecondition";
}
$params['contextid'] = $this->accesscontext->id;
list($sort, $sortparams) = users_order_by_sql('u', $search, $this->accesscontext);
$order = ' ORDER BY ' . $sort;
$result = array();
if ($search) {
$groupname1 = get_string('enrolledusersmatching', 'enrol', $search);
$groupname2 = get_string('potusersmatching', 'core_role', $search);
} else {
$groupname1 = get_string('enrolledusers', 'enrol');
$groupname2 = get_string('potusers', 'core_role');
}
if ($sql1) {
$enrolleduserscount = $DB->count_records_sql($countfields . $sql1, $params);
if (!$this->is_validating() and $enrolleduserscount > $this->maxusersperpage) {
$result[$groupname1] = array();
$toomany = $this->too_many_results($search, $enrolleduserscount);
$result[implode(' - ', array_keys($toomany))] = array();
} else {
$enrolledusers = $DB->get_records_sql($fields . $sql1 . $order, array_merge($params, $sortparams));
if ($enrolledusers) {
$result[$groupname1] = $enrolledusers;
}
}
if ($sql2) {
$result[''] = array();
}
}
if ($sql2) {
$otheruserscount = $DB->count_records_sql($countfields . $sql2, $params);
if (!$this->is_validating() and $otheruserscount > $this->maxusersperpage) {
$result[$groupname2] = array();
$toomany = $this->too_many_results($search, $otheruserscount);
$result[implode(' - ', array_keys($toomany))] = array();
} else {
$otherusers = $DB->get_records_sql($fields . $sql2 . $order, array_merge($params, $sortparams));
if ($otherusers) {
$result[$groupname2] = $otherusers;
}
}
}
return $result;
}
protected function get_options() {
global $CFG;
$options = parent::get_options();
$options['file'] = $CFG->admin . '/roles/lib.php';
return $options;
}
}