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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/>.
/**
* Abstract analyser in course basis.
*
* @package core_analytics
* @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace core_analytics\local\analyser;
defined('MOODLE_INTERNAL') || die();
/**
* Abstract analyser in course basis.
*
* @package core_analytics
* @copyright 2016 David Monllao {@link http://www.davidmonllao.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
abstract class by_course extends base {
/**
* Return the list of courses to analyse.
*
* @param string|null $action 'prediction', 'training' or null if no specific action needed.
* @param \context[] $contexts Only analysables that depend on the provided contexts. All analysables in the system if empty.
* @return \Iterator
*/
public function get_analysables_iterator(?string $action = null, array $contexts = []) {
global $DB;
list($sql, $params) = $this->get_iterator_sql('course', CONTEXT_COURSE, $action, 'c', $contexts);
$ordersql = $this->order_sql('sortorder', 'ASC', 'c');
$recordset = $DB->get_recordset_sql($sql . $ordersql, $params);
if (!$recordset->valid()) {
$this->add_log(get_string('nocourses', 'analytics'));
return new \ArrayIterator([]);
}
return new \core\dml\recordset_walk($recordset, function($record) {
if ($record->id == SITEID) {
return false;
}
$context = \context_helper::preload_from_record($record);
return \core_analytics\course::instance($record, $context);
});
}
/**
* Can be limited to course categories or specific courses.
*
* @return array
*/
public static function context_restriction_support(): array {
return [CONTEXT_COURSE, CONTEXT_COURSECAT];
}
}