date.php

<?php
 
namespace Bitrix\Main\Type;
 
use Bitrix\Main;
use Bitrix\Main\Context;
 
class Date
{
    protected $value;
 
    public function __construct($date = null, $format = null)
    {
        $this->value = new \DateTime();
        if ($date !== null && $date !== "")
        {
            if ($format === null)
            {
                $format = static::getFormat();
            }
 
            $parsedValue = $this->parse($format, $date);
 
            if($parsedValue === false)
            {
                throw new Main\ObjectException("Incorrect date: ".$date);
            }
 
            if(isset($parsedValue["timestamp"]))
            {
                $this->value->setTimestamp($parsedValue["timestamp"]);
            }
            else
            {
                $this->value->setDate($parsedValue['year'], $parsedValue['month'], $parsedValue['day']);
            }
        }
        $this->value->setTime(0, 0);
    }
 
    protected function parse($format, $time)
    {
        $parsedValue = date_parse_from_format($format, $time);
 
        //Ignore errors when format is longer than date
        //or date string is longer than format
        if ($parsedValue['error_count'] > 1)
        {
            $error = current($parsedValue['errors']);
 
            if ($error === 'A two digit second could not be found')
            {
                //possibly missed seconds with am/pm format
                $timestamp = strtotime($time);
 
                if ($timestamp === false)
                {
                    return false;
                }
 
                return [
                    "timestamp" => $timestamp,
                ];
            }
            if ($error !== 'Trailing data' && $error !== 'Data missing')
            {
                return false;
            }
        }
 
        if(isset($parsedValue["relative"]["second"]) && $parsedValue["relative"]["second"] <> 0)
        {
            return [
                "timestamp" => $parsedValue["relative"]["second"],
            ];
        }
 
        //normalize values
        if($parsedValue['month'] === false)
        {
            $parsedValue['month'] = 1;
        }
        if($parsedValue['day'] === false)
        {
            $parsedValue['day'] = 1;
        }
 
        return $parsedValue;
    }
 
    public function format($format)
    {
        return $this->value->format($format);
    }
 
    public function __clone()
    {
        $this->value = clone $this->value;
    }
 
    public function add($interval)
    {
        $i = $this->tryToCreateIntervalByDesignators($interval);
        if ($i == null)
        {
            $i = \DateInterval::createFromDateString($interval);
        }
 
        $this->value->add($i);
 
        return $this;
    }
 
    public function setDate($year, $month, $day)
    {
        $this->value->setDate($year, $month, $day);
 
        return $this;
    }
 
    private function tryToCreateIntervalByDesignators($interval)
    {
        if (!is_string($interval) || strpos($interval, ' ') !== false)
        {
            return null;
        }
 
        $i = null;
        try
        {
            $intervalTmp = strtoupper($interval);
            $isNegative = false;
            $firstChar = substr($intervalTmp, 0, 1);
            if ($firstChar === "-")
            {
                $isNegative = true;
                $intervalTmp = substr($intervalTmp, 1);
                $firstChar = substr($intervalTmp, 0, 1);
            }
 
            if ($firstChar !== "P")
            {
                $intervalTmp = "P".$intervalTmp;
            }
            $i = new \DateInterval($intervalTmp);
            if ($isNegative)
            {
                $i->invert = 1;
            }
        }
        catch (\Exception $e)
        {
        }
 
        return $i;
    }
 
    public function getTimestamp()
    {
        return $this->value->getTimestamp();
    }
 
    public function getDiff(Date $time)
    {
        return $this->value->diff($time->value);
    }
 
    public function toString(Context\Culture $culture = null)
    {
        $format = static::getFormat($culture);
        return $this->format($format);
    }
 
    public function __toString()
    {
        return $this->toString();
    }
 
    public static function getFormat(Context\Culture $culture = null)
    {
        static $defaultCulture = null;
 
        if($culture === null)
        {
            if($defaultCulture === null)
            {
                $context = Context::getCurrent();
                if($context)
                {
                    $defaultCulture = $context->getCulture();
                }
            }
            $culture = $defaultCulture;
        }
 
        $format = static::getCultureFormat($culture);
 
        return static::convertFormatToPhp($format);
    }
 
    protected static function getCultureFormat(Context\Culture $culture = null)
    {
        if($culture)
        {
            return $culture->getDateFormat();
        }
        return "DD.MM.YYYY";
    }
 
    public static function convertFormatToPhp($format)
    {
        static $from = array(
            "YYYY", // 1999
            "MMMM", // January - December
            "MM", // 01 - 12
            "DD", // 01 - 31
            "TT", // AM - PM
            "T", // am - pm
            "MI", // 00 - 59
            "SS", // 00 - 59
        );
        static $to = array(
            "Y", // 1999
            "F", // January - December
            "m", // 01 - 12
            "d", // 01 - 31
            "A", // AM - PM
            "a", // am - pm
            "i", // 00 - 59
            "s", // 00 - 59
        );
 
        $format = str_replace($from, $to, $format);
 
        $tempFormat = $format;
        $format = str_replace("HH", "H", $format); // 00 - 24
        if ($tempFormat === $format)
        {
            $format = str_replace("H", "h", $format); // 01 - 12
        }
 
        $tempFormat = $format;
        $format = str_replace("GG", "G", $format); // 0 - 24
        if ($tempFormat === $format)
        {
            $format = str_replace("G", "g", $format); // 1 - 12
        }
 
        return $format;
    }
 
    public static function isCorrect($time, $format = null)
    {
        if (empty($time))
        {
            return false;
        }
 
        $result = true;
 
        try
        {
            new static($time, $format);
        }
        catch (Main\ObjectException $ex)
        {
            $result = false;
        }
 
        return $result;
    }
 
    public static function createFromPhp(\DateTime $datetime)
    {
        $d = new static();
        $d->value = clone $datetime;
        $d->value->setTime(0, 0);
        return $d;
    }
 
    public static function createFromTimestamp($timestamp)
    {
        $d = new static();
        $d->value->setTimestamp($timestamp);
        $d->value->setTime(0, 0);
        return $d;
    }
 
    public static function createFromText($text)
    {
        $result = Main\Text\DateConverter::decode($text);
        if (empty($result))
        {
            return null;
        }
        
        return $result[0]->getDate();
    }
}