<?php

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';
	}
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NjExMTc5ODg1MjAxMDk5NiAyNjYwMDQ2ODYwOTUxOTYyIDE4MTAxNjg3Nzg5MDMwODI=