source: moodle/trunk/fuentes/admin/roles/classes/potential_assignees_below_course.php @ 136

Last change on this file since 136 was 136, checked in by mabarracus, 4 years ago

Ported code to xenial

File size: 3.2 KB
Line 
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 * Library code used by the roles administration interfaces.
19 *
20 * @package    core_role
21 * @copyright  1999 onwards Martin Dougiamas (http://dougiamas.com)
22 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
23 */
24
25defined('MOODLE_INTERNAL') || die();
26
27/**
28 * User selector subclass for the list of potential users on the assign roles page,
29 * when we are assigning in a context below the course level. (CONTEXT_MODULE and
30 * some CONTEXT_BLOCK).
31 *
32 * This returns only enrolled users in this context.
33 */
34class core_role_potential_assignees_below_course extends core_role_assign_user_selector_base {
35    public function find_users($search) {
36        global $DB;
37
38        list($enrolsql, $eparams) = get_enrolled_sql($this->context);
39
40        // Now we have to go to the database.
41        list($wherecondition, $params) = $this->search_sql($search, 'u');
42        $params = array_merge($params, $eparams);
43
44        if ($wherecondition) {
45            $wherecondition = ' AND ' . $wherecondition;
46        }
47
48        $fields      = 'SELECT ' . $this->required_fields_sql('u');
49        $countfields = 'SELECT COUNT(u.id)';
50
51        $sql   = " FROM ($enrolsql) enrolled_users_view
52                   JOIN {user} u ON u.id = enrolled_users_view.id
53              LEFT JOIN {role_assignments} ra ON (ra.userid = enrolled_users_view.id AND
54                                            ra.roleid = :roleid AND ra.contextid = :contextid)
55                  WHERE ra.id IS NULL
56                        $wherecondition";
57        $params['contextid'] = $this->context->id;
58        $params['roleid'] = $this->roleid;
59
60        list($sort, $sortparams) = users_order_by_sql('u', $search, $this->accesscontext);
61        $order = ' ORDER BY ' . $sort;
62
63        // Check to see if there are too many to show sensibly.
64        if (!$this->is_validating()) {
65            $potentialmemberscount = $DB->count_records_sql($countfields . $sql, $params);
66            if ($potentialmemberscount > $this->maxusersperpage) {
67                return $this->too_many_results($search, $potentialmemberscount);
68            }
69        }
70
71        // If not, show them.
72        $availableusers = $DB->get_records_sql($fields . $sql . $order, array_merge($params, $sortparams));
73
74        if (empty($availableusers)) {
75            return array();
76        }
77
78        if ($search) {
79            $groupname = get_string('potusersmatching', 'core_role', $search);
80        } else {
81            $groupname = get_string('potusers', 'core_role');
82        }
83
84        return array($groupname => $availableusers);
85    }
86}
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