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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 periodically.
*
* @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\local\time_splitting;
defined('MOODLE_INTERNAL') || die();
/**
* Time splitting method that generates predictions periodically.
*
* @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
*/
abstract class upcoming_periodic extends periodic implements after_now {
/**
* Gets the next range with start on the provided time.
*
* The next range is based on the upcoming period so we add this
* range's periodicity to $time.
*
* @param \DateTimeImmutable $time
* @return array
*/
protected function get_next_range(\DateTimeImmutable $time) {
$start = $time->getTimestamp();
$end = $time->add($this->periodicity())->getTimestamp();
return [
'start' => $start,
'end' => $end,
'time' => $start
];
}
/**
* Whether to cache or not the indicator calculations.
* @return bool
*/
public function cache_indicator_calculations(): bool {
return false;
}
/**
* Overriden as these time-splitting methods are based on future dates.
*
* @return bool
*/
public function valid_for_evaluation(): bool {
return false;
}
/**
* Get the start of the first time range.
*
* Overwriten to start generating predictions about upcoming stuff from time().
*
* @return int A timestamp.
*/
protected function get_first_start() {
global $DB;
$cache = \cache::make('core', 'modelfirstanalyses');
$key = $this->modelid . '_' . $this->analysable->get_id();
$firstanalysis = $cache->get($key);
if (!empty($firstanalysis)) {
return $firstanalysis;
}
// This analysable has not yet been analysed, the start is therefore now.
return time();
}
}