127 lines
3.5 KiB
PHP
127 lines
3.5 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.potencier@symfony-project.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\Config;
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/**
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* ConfigCache manages PHP cache files.
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*
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* When debug is enabled, it knows when to flush the cache
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* thanks to an array of ResourceInterface instances.
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*
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* @author Fabien Potencier <fabien.potencier@symfony-project.com>
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*/
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class ConfigCache
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{
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protected $debug;
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protected $cacheDir;
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protected $file;
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/**
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* Constructor.
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*
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* @param string $cacheDir The cache directory
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* @param string $file The cache file name (without the .php extension)
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* @param Boolean $debug Whether debugging is enabled or not
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*/
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public function __construct($cacheDir, $file, $debug)
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{
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$this->cacheDir = $cacheDir;
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$this->file = $file;
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$this->debug = (Boolean) $debug;
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}
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/**
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* Gets the cache file path.
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*
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* @return string The cache file path
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*/
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public function __toString()
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{
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return $this->cacheDir.'/'.$this->file.'.php';
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}
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/**
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* Checks if the cache is still fresh.
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*
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* This method always returns true is debug is on and the cache file exists.
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*
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* @return Boolean true if the cache is fresh, false otherwise
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*/
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public function isFresh()
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{
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$file = $this->getCacheFile();
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if (!file_exists($file)) {
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return false;
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}
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if (!$this->debug) {
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return true;
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}
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$metadata = $this->getCacheFile('meta');
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if (!file_exists($metadata)) {
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return false;
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}
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$time = filemtime($file);
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$meta = unserialize(file_get_contents($metadata));
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foreach ($meta as $resource) {
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if (!$resource->isFresh($time)) {
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return false;
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}
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}
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return true;
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}
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/**
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* Writes cache.
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*
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* @param string $content The content to write in the cache
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* @param array $metadata An array of ResourceInterface instances
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*
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* @throws \RuntimeException When cache file can't be wrote
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*/
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public function write($content, array $metadata = null)
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{
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$file = $this->getCacheFile();
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$dir = dirname($file);
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if (!is_dir($dir)) {
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if (false === @mkdir($dir, 0777, true)) {
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throw new \RuntimeException(sprintf('Unable to create the %s directory', $dir));
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}
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} elseif (!is_writable($dir)) {
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throw new \RuntimeException(sprintf('Unable to write in the %s directory', $dir));
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}
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$tmpFile = tempnam(dirname($file), basename($file));
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if (false !== @file_put_contents($tmpFile, $content) && @rename($tmpFile, $file)) {
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chmod($file, 0666);
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} else {
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throw new \RuntimeException(sprintf('Failed to write cache file "%s".', $this->file));
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}
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if (null !== $metadata && true === $this->debug) {
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$file = $this->getCacheFile('meta');
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$tmpFile = tempnam(dirname($file), basename($file));
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if (false !== @file_put_contents($tmpFile, serialize($metadata)) && @rename($tmpFile, $file)) {
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chmod($file, 0666);
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}
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}
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}
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protected function getCacheFile($extension = 'php')
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{
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return $this->cacheDir.'/'.$this->file.'.'.$extension;
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}
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}
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