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- <?php
- /*
- * This file is part of the Assetic package, an OpenSky project.
- *
- * (c) 2010-2012 OpenSky Project Inc
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
- namespace Assetic\Cache;
- /**
- * A config cache stores values using var_export() and include.
- *
- * @author Kris Wallsmith <kris.wallsmith@gmail.com>
- */
- class ConfigCache
- {
- private $dir;
- /**
- * Construct.
- *
- * @param string $dir The cache directory
- */
- public function __construct($dir)
- {
- $this->dir = $dir;
- }
- /**
- * Checks of the cache has a file.
- *
- * @param string $resource A cache key
- *
- * @return Boolean True if a file exists
- */
- public function has($resource)
- {
- return file_exists($this->getSourcePath($resource));
- }
- /**
- * Writes a value to a file.
- *
- * @param string $resource A cache key
- * @param mixed $value A value to cache
- */
- public function set($resource, $value)
- {
- $path = $this->getSourcePath($resource);
- if (!is_dir($dir = dirname($path)) && false === @mkdir($dir, 0777, true)) {
- // @codeCoverageIgnoreStart
- throw new \RuntimeException('Unable to create directory '.$dir);
- // @codeCoverageIgnoreEnd
- }
- if (false === @file_put_contents($path, sprintf("<?php\n\n// $resource\nreturn %s;\n", var_export($value, true)))) {
- // @codeCoverageIgnoreStart
- throw new \RuntimeException('Unable to write file '.$path);
- // @codeCoverageIgnoreEnd
- }
- }
- /**
- * Loads and returns the value for the supplied cache key.
- *
- * @param string $resource A cache key
- *
- * @return mixed The cached value
- */
- public function get($resource)
- {
- $path = $this->getSourcePath($resource);
- if (!file_exists($path)) {
- throw new \RuntimeException('There is no cached value for '.$resource);
- }
- return include $path;
- }
- /**
- * Returns a timestamp for when the cache was created.
- *
- * @param string $resource A cache key
- *
- * @return integer A UNIX timestamp
- */
- public function getTimestamp($resource)
- {
- $path = $this->getSourcePath($resource);
- if (!file_exists($path)) {
- throw new \RuntimeException('There is no cached value for '.$resource);
- }
- if (false === $mtime = @filemtime($path)) {
- // @codeCoverageIgnoreStart
- throw new \RuntimeException('Unable to determine file mtime for '.$path);
- // @codeCoverageIgnoreEnd
- }
- return $mtime;
- }
- /**
- * Returns the path where the file corresponding to the supplied cache key can be included from.
- *
- * @param string $resource A cache key
- *
- * @return string A file path
- */
- private function getSourcePath($resource)
- {
- $key = md5($resource);
- return $this->dir.'/'.$key[0].'/'.$key.'.php';
- }
- }
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