TimePeriod.php

<?php
 
namespace ceLTIc\LTI\Content;
 
class TimePeriod
{
 
    private $startDateTime = null;
 
    private $endDateTime = null;
 
    function __construct($startDateTime, $endDateTime)
    {
        if (is_int($startDateTime)) {
            $this->startDateTime = $startDateTime;
        }
        if (is_int($endDateTime)) {
            $this->endDateTime = $endDateTime;
        }
    }
 
    public function toJsonldObject()
    {
        return $this->toJsonObject();
    }
 
    public function toJsonObject()
    {
        $timePeriod = new \stdClass();
        if (!is_null($this->startDateTime)) {
            $timePeriod->startDateTime = gmdate('Y-m-d\TH:i:s\Z', $this->startDateTime);
        } else {
            $timePeriod->startDateTime = null;
        }
        if (!is_null($this->endDateTime)) {
            $timePeriod->endDateTime = gmdate('Y-m-d\TH:i:s\Z', $this->endDateTime);
        } else {
            $timePeriod->endDateTime = null;
        }
 
        return $timePeriod;
    }
 
    public static function fromJsonObject($item)
    {
        $obj = null;
        $startDateTime = null;
        $endDateTime = null;
        if (is_object($item)) {
            $url = null;
            foreach (get_object_vars($item) as $name => $value) {
                switch ($name) {
                    case 'startDateTime':
                        $startDateTime = strtotime($item->startDateTime);
                        break;
                    case 'endDateTime':
                        $endDateTime = strtotime($item->endDateTime);
                        break;
                }
            }
        } else {
            $url = $item;
        }
        if ($startDateTime || $endDateTime) {
            $obj = new TimePeriod($startDateTime, $endDateTime);
        }
 
        return $obj;
    }
 
}