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sources/3rdparty/kriswallsmith/assetic/src/Assetic/Cache/ConfigCache.php
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<?php
/*
* This file is part of the Assetic package, an OpenSky project.
*
* (c) 2010-2014 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
// $resource
return %s;
", var_export($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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