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