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