FileAsset.php

<?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\Asset;

use Assetic\Util\PathUtils;
use Assetic\Filter\FilterInterface;

/**
 * Represents an asset loaded from a file.
 *
 * @author Kris Wallsmith <kris.wallsmith@gmail.com>
 */
class FileAsset extends BaseAsset {
  private $source;

  /**
   * Constructor.
   *
   * @param string $source     An absolute path
   * @param array  $filters    An array of filters
   * @param string $sourceRoot The source asset root directory
   * @param string $sourcePath The source asset path
   *
   * @throws \InvalidArgumentException If the supplied root doesn't match the source when guessing the path
   */
  public function __construct($source, $filters = array(), $sourceRoot = null, $sourcePath = null, array $vars = array()) {
    if (null === $sourceRoot) {
      $sourceRoot = dirname($source);
      if (null === $sourcePath) {
        $sourcePath = basename($source);
      }
    }
    elseif (null === $sourcePath) {
      if (0 !== strpos($source, $sourceRoot)) {
        throw new \InvalidArgumentException(sprintf('The source "%s" is not in the root directory "%s"', $source, $sourceRoot));
      }
      $sourcePath = substr($source, strlen($sourceRoot) + 1);
    }
    $this->source = $source;
    parent::__construct($filters, $sourceRoot, $sourcePath, $vars);
  }
  public function load(FilterInterface $additionalFilter = null) {
    $source = PathUtils::resolvePath($this->source, $this
      ->getVars(), $this
      ->getValues());
    if (!is_file($source)) {
      throw new \RuntimeException(sprintf('The source file "%s" does not exist.', $source));
    }
    $this
      ->doLoad(file_get_contents($source), $additionalFilter);
  }
  public function getLastModified() {
    $source = PathUtils::resolvePath($this->source, $this
      ->getVars(), $this
      ->getValues());
    if (!is_file($source)) {
      throw new \RuntimeException(sprintf('The source file "%s" does not exist.', $source));
    }
    return filemtime($source);
  }

}