datetime.php

<?
 
namespace Bitrix\Main\UI\Filter;
 
 
use Bitrix\Main\Type as MainType;
 
 
class DateTime
{
    protected $date;
 
    protected $dateTime;
 
    protected $timestamp;
 
 
    public function __construct($timestamp = "")
    {
        $this->timestamp = $timestamp;
 
        if (empty($this->timestamp))
        {
            $this->date = new MainType\Date();
            $this->timestamp = $this->date->getTimestamp();
        }
 
        $this->dateTime = MainType\DateTime::createFromTimestamp($this->timestamp);
        static::adjustTime($this->dateTime);
    }
 
 
    public static function adjustTime(MainType\DateTime $dateTime)
    {
        if(\CTimeZone::Enabled())
        {
            static $diff = null;
            if($diff === null)
            {
                $diff = \CTimeZone::GetOffset();
            }
            if($diff <> 0)
            {
                $dateTime->add(($diff > 0? "-":"")."PT".abs($diff)."S");
            }
        }
    }
 
 
 
    public function month()
    {
        $date = new MainType\Date($this->toString());
        return $date->format("n");
    }
 
 
    public function year()
    {
        $date = new MainType\Date($this->toString());
        return $date->format("Y");
    }
 
 
    public function quarter()
    {
        $date = new MainType\Date($this->toString());
        return Quarter::get($date);
    }
 
 
    public function quarterStart()
    {
        $startDate = Quarter::getStartDate($this->quarter(), $this->year());
        $dateTime = MainType\DateTime::createFromTimestamp(MakeTimeStamp($startDate));
        static::adjustTime($dateTime);
        return $dateTime->toString();
    }
 
 
    public function quarterEnd()
    {
        $endDate = Quarter::getEndDate($this->quarter(), $this->year());
        $dateTime = MainType\DateTime::createFromUserTime($endDate);
        $dateTime->add("- 1 second");
        return $dateTime->toString();
    }
 
 
    public function offset($offset)
    {
        $date = MainType\DateTime::createFromTimestamp($this->getTimestamp());
        $date->add($offset);
        static::adjustTime($date);
        return $date->toString();
    }
 
 
    public function toString()
    {
        return $this->dateTime->toString();
    }
 
 
    public function getTimestamp()
    {
        return $this->timestamp;
    }
}