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✏️ Editing: potential_assignees_below_course.php

<?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/>.

/**
 * Library code used by the roles administration interfaces.
 *
 * @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();

/**
 * User selector subclass for the list of potential users on the assign roles page,
 * when we are assigning in a context below the course level. (CONTEXT_MODULE and
 * some CONTEXT_BLOCK).
 *
 * This returns only enrolled users in this context.
 */
class core_role_potential_assignees_below_course extends core_role_assign_user_selector_base {
    public function find_users($search) {
        global $DB;

list($enrolsql, $eparams) = get_enrolled_sql($this->context);

// Now we have to go to the database.
        list($wherecondition, $params) = $this->search_sql($search, 'u');
        $params = array_merge($params, $eparams, $this->userfieldsparams);

if ($wherecondition) {
            $wherecondition = ' AND ' . $wherecondition;
        }

$fields      = 'SELECT u.id, ' . $this->userfieldsselects;
        $countfields = 'SELECT COUNT(u.id)';

$sql   = " FROM ($enrolsql) enrolled_users_view
                   JOIN {user} u ON u.id = enrolled_users_view.id
              LEFT JOIN {role_assignments} ra ON (ra.userid = enrolled_users_view.id AND
                                            ra.roleid = :roleid AND ra.contextid = :contextid)
                        $this->userfieldsjoin
                  WHERE ra.id IS NULL
                        $wherecondition";
        $params['contextid'] = $this->context->id;
        $params['roleid'] = $this->roleid;

list($sort, $sortparams) = users_order_by_sql('u', $search, $this->accesscontext, $this->userfieldsmappings);
        $order = ' ORDER BY ' . $sort;

// Check to see if there are too many to show sensibly.
        if (!$this->is_validating()) {
            $potentialmemberscount = $DB->count_records_sql($countfields . $sql, $params);
            if ($potentialmemberscount > $this->maxusersperpage) {
                return $this->too_many_results($search, $potentialmemberscount);
            }
        }

// If not, show them.
        $availableusers = $DB->get_records_sql($fields . $sql . $order, array_merge($params, $sortparams));

if (empty($availableusers)) {
            return array();
        }

if ($search) {
            $groupname = get_string('potusersmatching', 'core_role', $search);
        } else {
            $groupname = get_string('potusers', 'core_role');
        }

return array($groupname => $availableusers);
    }
}

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