Chris@14: <?php
Chris@14: 
Chris@14: /*
Chris@14:  * This file is part of the Symfony package.
Chris@14:  *
Chris@14:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@14:  *
Chris@14:  * For the full copyright and license information, please view the LICENSE
Chris@14:  * file that was distributed with this source code.
Chris@14:  */
Chris@14: 
Chris@14: namespace Symfony\Component\Serializer\Normalizer;
Chris@14: 
Chris@14: use Symfony\Component\Serializer\Exception\InvalidArgumentException;
Chris@14: use Symfony\Component\Serializer\Exception\UnexpectedValueException;
Chris@14: 
Chris@14: /**
Chris@14:  * Normalizes an instance of {@see \DateInterval} to an interval string.
Chris@14:  * Denormalizes an interval string to an instance of {@see \DateInterval}.
Chris@14:  *
Chris@14:  * @author Jérôme Parmentier <jerome@prmntr.me>
Chris@14:  */
Chris@14: class DateIntervalNormalizer implements NormalizerInterface, DenormalizerInterface
Chris@14: {
Chris@14:     const FORMAT_KEY = 'dateinterval_format';
Chris@14: 
Chris@14:     private $format;
Chris@14: 
Chris@14:     /**
Chris@14:      * @param string $format
Chris@14:      */
Chris@14:     public function __construct($format = 'P%yY%mM%dDT%hH%iM%sS')
Chris@14:     {
Chris@14:         $this->format = $format;
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * {@inheritdoc}
Chris@14:      *
Chris@14:      * @throws InvalidArgumentException
Chris@14:      */
Chris@17:     public function normalize($object, $format = null, array $context = [])
Chris@14:     {
Chris@14:         if (!$object instanceof \DateInterval) {
Chris@14:             throw new InvalidArgumentException('The object must be an instance of "\DateInterval".');
Chris@14:         }
Chris@14: 
Chris@14:         $dateIntervalFormat = isset($context[self::FORMAT_KEY]) ? $context[self::FORMAT_KEY] : $this->format;
Chris@14: 
Chris@14:         return $object->format($dateIntervalFormat);
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * {@inheritdoc}
Chris@14:      */
Chris@14:     public function supportsNormalization($data, $format = null)
Chris@14:     {
Chris@14:         return $data instanceof \DateInterval;
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * {@inheritdoc}
Chris@14:      *
Chris@14:      * @throws InvalidArgumentException
Chris@14:      * @throws UnexpectedValueException
Chris@14:      */
Chris@17:     public function denormalize($data, $class, $format = null, array $context = [])
Chris@14:     {
Chris@17:         if (!\is_string($data)) {
Chris@17:             throw new InvalidArgumentException(sprintf('Data expected to be a string, %s given.', \gettype($data)));
Chris@14:         }
Chris@14: 
Chris@14:         if (!$this->isISO8601($data)) {
Chris@14:             throw new UnexpectedValueException('Expected a valid ISO 8601 interval string.');
Chris@14:         }
Chris@14: 
Chris@14:         $dateIntervalFormat = isset($context[self::FORMAT_KEY]) ? $context[self::FORMAT_KEY] : $this->format;
Chris@14: 
Chris@14:         $valuePattern = '/^'.preg_replace('/%([yYmMdDhHiIsSwW])(\w)/', '(?P<$1>\d+)$2', $dateIntervalFormat).'$/';
Chris@14:         if (!preg_match($valuePattern, $data)) {
Chris@14:             throw new UnexpectedValueException(sprintf('Value "%s" contains intervals not accepted by format "%s".', $data, $dateIntervalFormat));
Chris@14:         }
Chris@14: 
Chris@14:         try {
Chris@14:             return new \DateInterval($data);
Chris@14:         } catch (\Exception $e) {
Chris@14:             throw new UnexpectedValueException($e->getMessage(), $e->getCode(), $e);
Chris@14:         }
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * {@inheritdoc}
Chris@14:      */
Chris@14:     public function supportsDenormalization($data, $type, $format = null)
Chris@14:     {
Chris@14:         return \DateInterval::class === $type;
Chris@14:     }
Chris@14: 
Chris@14:     private function isISO8601($string)
Chris@14:     {
Chris@14:         return preg_match('/^P(?=\w*(?:\d|%\w))(?:\d+Y|%[yY]Y)?(?:\d+M|%[mM]M)?(?:(?:\d+D|%[dD]D)|(?:\d+W|%[wW]W))?(?:T(?:\d+H|[hH]H)?(?:\d+M|[iI]M)?(?:\d+S|[sS]S)?)?$/', $string);
Chris@14:     }
Chris@14: }