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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Form\Extension\Core\DataTransformer;
use Symfony\Component\Form\Exception\TransformationFailedException;
use Symfony\Component\Form\Exception\UnexpectedTypeException;
/**
* Transforms between a normalized time and a localized time string
*
* @author Bernhard Schussek <bschussek@gmail.com>
* @author Florian Eckerstorfer <florian@eckerstorfer.org>
*/
class DateTimeToLocalizedStringTransformer extends BaseDateTimeTransformer
{
private $dateFormat;
private $timeFormat;
private $pattern;
private $calendar;
/**
* Constructor.
*
* @see BaseDateTimeTransformer::formats for available format options
*
* @param string $inputTimezone The name of the input timezone
* @param string $outputTimezone The name of the output timezone
* @param integer $dateFormat The date format
* @param integer $timeFormat The time format
* @param integer $calendar One of the \IntlDateFormatter calendar constants
* @param string $pattern A pattern to pass to \IntlDateFormatter
*
* @throws UnexpectedTypeException If a format is not supported or if a timezone is not a string
*/
public function __construct($inputTimezone = null, $outputTimezone = null, $dateFormat = null, $timeFormat = null, $calendar = \IntlDateFormatter::GREGORIAN, $pattern = null)
{
parent::__construct($inputTimezone, $outputTimezone);
if (null === $dateFormat) {
$dateFormat = \IntlDateFormatter::MEDIUM;
}
if (null === $timeFormat) {
$timeFormat = \IntlDateFormatter::SHORT;
}
if (!in_array($dateFormat, self::$formats, true)) {
throw new UnexpectedTypeException($dateFormat, implode('", "', self::$formats));
}
if (!in_array($timeFormat, self::$formats, true)) {
throw new UnexpectedTypeException($timeFormat, implode('", "', self::$formats));
}
$this->dateFormat = $dateFormat;
$this->timeFormat = $timeFormat;
$this->calendar = $calendar;
$this->pattern = $pattern;
}
/**
* Transforms a normalized date into a localized date string/array.
*
* @param \DateTime $dateTime Normalized date.
*
* @return string|array Localized date string/array.
*
* @throws TransformationFailedException If the given value is not an instance
* of \DateTime or if the date could not
* be transformed.
*/
public function transform($dateTime)
{
if (null === $dateTime) {
return '';
}
if (!$dateTime instanceof \DateTime) {
throw new TransformationFailedException('Expected a \DateTime.');
}
// convert time to UTC before passing it to the formatter
$dateTime = clone $dateTime;
if ('UTC' !== $this->inputTimezone) {
$dateTime->setTimezone(new \DateTimeZone('UTC'));
}
$value = $this->getIntlDateFormatter()->format((int) $dateTime->format('U'));
if (intl_get_error_code() != 0) {
throw new TransformationFailedException(intl_get_error_message());
}
return $value;
}
/**
* Transforms a localized date string/array into a normalized date.
*
* @param string|array $value Localized date string/array
*
* @return \DateTime Normalized date
*
* @throws TransformationFailedException if the given value is not a string,
* if the date could not be parsed or
* if the input timezone is not supported
*/
public function reverseTransform($value)
{
if (!is_string($value)) {
throw new TransformationFailedException('Expected a string.');
}
if ('' === $value) {
return null;
}
$timestamp = $this->getIntlDateFormatter()->parse($value);
if (intl_get_error_code() != 0) {
throw new TransformationFailedException(intl_get_error_message());
}
try {
// read timestamp into DateTime object - the formatter delivers in UTC
$dateTime = new \DateTime(sprintf('@%s UTC', $timestamp));
} catch (\Exception $e) {
throw new TransformationFailedException($e->getMessage(), $e->getCode(), $e);
}
if ('UTC' !== $this->inputTimezone) {
try {
$dateTime->setTimezone(new \DateTimeZone($this->inputTimezone));
} catch (\Exception $e) {
throw new TransformationFailedException($e->getMessage(), $e->getCode(), $e);
}
}
return $dateTime;
}
/**
* Returns a preconfigured IntlDateFormatter instance
*
* @return \IntlDateFormatter
*/
protected function getIntlDateFormatter()
{
$dateFormat = $this->dateFormat;
$timeFormat = $this->timeFormat;
$timezone = $this->outputTimezone;
$calendar = $this->calendar;
$pattern = $this->pattern;
$intlDateFormatter = new \IntlDateFormatter(\Locale::getDefault(), $dateFormat, $timeFormat, $timezone, $calendar, $pattern);
$intlDateFormatter->setLenient(false);
return $intlDateFormatter;
}
}
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