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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Library code used by the roles administration interfaces.
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*
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* @package core_role
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* @copyright 1999 onwards Martin Dougiamas (http://dougiamas.com)
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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defined('MOODLE_INTERNAL') || die();
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/**
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* User selector subclass for the list of potential users on the assign roles page,
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* when we are assigning in a context below the course level. (CONTEXT_MODULE and
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* some CONTEXT_BLOCK).
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*
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* This returns only enrolled users in this context.
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*/
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class core_role_potential_assignees_below_course extends core_role_assign_user_selector_base {
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public function find_users($search) {
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global $DB;
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list($enrolsql, $eparams) = get_enrolled_sql($this->context);
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// Now we have to go to the database.
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list($wherecondition, $params) = $this->search_sql($search, 'u');
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$params = array_merge($params, $eparams, $this->userfieldsparams);
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if ($wherecondition) {
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$wherecondition = ' AND ' . $wherecondition;
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}
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$fields = 'SELECT u.id, ' . $this->userfieldsselects;
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$countfields = 'SELECT COUNT(u.id)';
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$sql = " FROM ($enrolsql) enrolled_users_view
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JOIN {user} u ON u.id = enrolled_users_view.id
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LEFT JOIN {role_assignments} ra ON (ra.userid = enrolled_users_view.id AND
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ra.roleid = :roleid AND ra.contextid = :contextid)
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$this->userfieldsjoin
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WHERE ra.id IS NULL
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$wherecondition";
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$params['contextid'] = $this->context->id;
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$params['roleid'] = $this->roleid;
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list($sort, $sortparams) = users_order_by_sql('u', $search, $this->accesscontext, $this->userfieldsmappings);
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$order = ' ORDER BY ' . $sort;
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// Check to see if there are too many to show sensibly.
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if (!$this->is_validating()) {
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$potentialmemberscount = $DB->count_records_sql($countfields . $sql, $params);
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if ($potentialmemberscount > $this->maxusersperpage) {
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return $this->too_many_results($search, $potentialmemberscount);
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}
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}
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// If not, show them.
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$availableusers = $DB->get_records_sql($fields . $sql . $order, array_merge($params, $sortparams));
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if (empty($availableusers)) {
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return array();
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}
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if ($search) {
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$groupname = get_string('potusersmatching', 'core_role', $search);
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} else {
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$groupname = get_string('potusers', 'core_role');
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}
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return array($groupname => $availableusers);
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}
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}
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