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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/>.
/**
* Time splitting method that generates predictions 3 days after the analysable start.
*
* @package core_analytics
* @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace core\analytics\time_splitting;
defined('MOODLE_INTERNAL') || die();
/**
* Time splitting method that generates predictions 3 days after the analysable start.
*
* @package core_analytics
* @copyright 2019 David Monllao {@link http://www.davidmonllao.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class ten_percent_after_start extends \core_analytics\local\time_splitting\after_start {
/**
* The time splitting method name.
*
* @return \lang_string
*/
public static function get_name(): \lang_string {
return new \lang_string('timesplitting:tenpercentafterstart');
}
/**
* Extended as we require and end date here.
*
* @param \core_analytics\analysable $analysable
* @return bool
*/
public function is_valid_analysable(\core_analytics\analysable $analysable) {
// We require an end date to calculate the 10%.
if (!$analysable->get_end()) {
return false;
}
return parent::is_valid_analysable($analysable);
}
/**
* The period we should wait until we generate predictions for this.
*
* @throws \coding_exception
* @param \core_analytics\analysable $analysable
* @return \DateInterval
*/
protected function wait_period(\core_analytics\analysable $analysable) {
if (!$analysable->get_end() || !$analysable->get_start()) {
throw new \coding_exception('Analysables with no start or end should be discarded in is_valid_analysable.');
}
$diff = $analysable->get_end() - $analysable->get_start();
// A 10% of $diff.
return new \DateInterval('PT' . intval($diff / 10) . 'S');
}
}