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