Your IP : 192.168.165.1
<?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/>.
/**
* Statement result for xAPI structure checking and usage.
*
* @package core_xapi
* @copyright 2020 Ferran Recio
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
namespace core_xapi\local\statement;
use core_xapi\xapi_exception;
use DateInterval;
use Exception;
use stdClass;
/**
* Abstract xAPI result class.
*
* @copyright 2020 Ferran Recio
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class item_result extends item {
/** @var int The second of duration if present. */
protected $duration;
/** @var item_score the result score if present. */
protected $score;
/**
* Function to create a result from part of the xAPI statement.
*
* @param stdClass $data the original xAPI element
* @param int $duration duration in seconds
* @param item_score $score the provided score
*/
protected function __construct(stdClass $data, int $duration = null, item_score $score = null) {
parent::__construct($data);
$this->duration = $duration;
$this->score = $score;
}
/**
* Function to create an item from part of the xAPI statement.
*
* @param stdClass $data the original xAPI element
* @return item item_result xAPI generated
*/
public static function create_from_data(stdClass $data): item {
$duration = null;
if (!empty($data->duration)) {
try {
// Duration uses ISO 8601 format which is ALMOST compatible with PHP DateInterval.
// Because we are mesuring human time we get rid of milliseconds, which are not
// compatible with DateInterval (More info: https://bugs.php.net/bug.php?id=53831),
// all other fractions like "P1.5Y" will throw an exception.
$value = preg_replace('/[.,][0-9]*S/', 'S', $data->duration);
$interval = new DateInterval($value);
$duration = date_create('@0')->add($interval)->getTimestamp();
} catch (Exception $e) {
throw new xapi_exception('Invalid duration format.');
}
}
$score = null;
if (!empty($data->score)) {
$score = item_score::create_from_data($data->score);
}
return new self($data, $duration, $score);
}
/**
* Returns the duration in seconds (if present).
*
* @return int|null duration in seconds
*/
public function get_duration(): ?int {
return $this->duration;
}
/**
* Returns the score.
*
* @return item_score|null the score item
*/
public function get_score(): ?item_score {
return $this->score;
}
}