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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\Cache\Marshaller; /** * A marshaller optimized for data structures generated by AbstractTagAwareAdapter. * * @author Nicolas Grekas <p@tchwork.com> */ class TagAwareMarshaller implements MarshallerInterface { private $marshaller; public function __construct(MarshallerInterface $marshaller = null) { $this->marshaller = $marshaller ?? new DefaultMarshaller(); } /** * {@inheritdoc} */ public function marshall(array $values, ?array &$failed): array { $failed = $notSerialized = $serialized = []; foreach ($values as $id => $value) { if (\is_array($value) && \is_array($value['tags'] ?? null) && \array_key_exists('value', $value) && \count($value) === 2 + (\is_string($value['meta'] ?? null) && 8 === \strlen($value['meta']))) { // if the value is an array with keys "tags", "value" and "meta", use a compact serialization format // magic numbers in the form 9D-..-..-..-..-00-..-..-..-5F allow detecting this format quickly in unmarshall() $v = $this->marshaller->marshall($value, $f); if ($f) { $f = []; $failed[] = $id; } else { if ([] === $value['tags']) { $v['tags'] = ''; } $serialized[$id] = "\x9D".($value['meta'] ?? "\0\0\0\0\0\0\0\0").pack('N', \strlen($v['tags'])).$v['tags'].$v['value']; $serialized[$id][9] = "\x5F"; } } else { // other arbitratry values are serialized using the decorated marshaller below $notSerialized[$id] = $value; } } if ($notSerialized) { $serialized += $this->marshaller->marshall($notSerialized, $f); $failed = array_merge($failed, $f); } return $serialized; } /** * {@inheritdoc} */ public function unmarshall(string $value) { // detect the compact format used in marshall() using magic numbers in the form 9D-..-..-..-..-00-..-..-..-5F if (13 >= \strlen($value) || "\x9D" !== $value[0] || "\0" !== $value[5] || "\x5F" !== $value[9]) { return $this->marshaller->unmarshall($value); } // data consists of value, tags and metadata which we need to unpack $meta = substr($value, 1, 12); $meta[8] = "\0"; $tagLen = unpack('Nlen', $meta, 8)['len']; $meta = substr($meta, 0, 8); return [ 'value' => $this->marshaller->unmarshall(substr($value, 13 + $tagLen)), 'tags' => $tagLen ? $this->marshaller->unmarshall(substr($value, 13, $tagLen)) : [], 'meta' => "\0\0\0\0\0\0\0\0" === $meta ? null : $meta, ]; } }