<?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:----MTI5NjQyODc0MzA1NTY3MCA0NjE1Mjk0NTUzMTUyOTY1IDU3MDMzNTYyNzQ1MzI5NQ==