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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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* This is filter is used to see which students are enroled on any courses
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*
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* @package core_user
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* @copyright 2014 Krister Viirsaar
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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 filter to distinguish users with no or any enroled courses.
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* @copyright 2014 Krister Viirsaar
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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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class user_filter_anycourses extends user_filter_yesno {
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/**
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* Returns the condition to be used with SQL
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*
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* @param array $data filter settings
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* @return array sql string and $params
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*/
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public function get_sql_filter($data) {
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$value = $data['value'];
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$not = $value ? '' : 'NOT';
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return array("EXISTS ( SELECT userid FROM {user_enrolments} ) AND " .
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" id $not IN ( SELECT userid FROM {user_enrolments} )", array());
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}
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}
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