DirectoryResource.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\Factory\Resource;


/**
 * A resource is something formulae can be loaded from.
 *
 * @author Kris Wallsmith <kris.wallsmith@gmail.com>
 */
class DirectoryResource implements IteratorResourceInterface {
  private $path;
  private $pattern;

  /**
   * Constructor.
   *
   * @param string $path    A directory path
   * @param string $pattern A filename pattern
   */
  public function __construct($path, $pattern = null) {
    if (DIRECTORY_SEPARATOR != substr($path, -1)) {
      $path .= DIRECTORY_SEPARATOR;
    }
    $this->path = $path;
    $this->pattern = $pattern;
  }
  public function isFresh($timestamp) {
    if (!is_dir($this->path) || filemtime($this->path) > $timestamp) {
      return false;
    }
    foreach ($this as $resource) {
      if (!$resource
        ->isFresh($timestamp)) {
        return false;
      }
    }
    return true;
  }

  /**
   * Returns the combined content of all inner resources.
   */
  public function getContent() {
    $content = array();
    foreach ($this as $resource) {
      $content[] = $resource
        ->getContent();
    }
    return implode("\n", $content);
  }
  public function __toString() {
    return $this->path;
  }
  public function getIterator() {
    return is_dir($this->path) ? new DirectoryResourceIterator($this
      ->getInnerIterator()) : new \EmptyIterator();
  }
  protected function getInnerIterator() {
    return new DirectoryResourceFilterIterator(new \RecursiveDirectoryIterator($this->path, \RecursiveDirectoryIterator::FOLLOW_SYMLINKS), $this->pattern);
  }

}

/**
 * An iterator that converts file objects into file resources.
 *
 * @author Kris Wallsmith <kris.wallsmith@gmail.com>
 * @access private
 */
class DirectoryResourceIterator extends \RecursiveIteratorIterator {
  public function current() {
    return new FileResource(parent::current()
      ->getPathname());
  }

}

/**
 * Filters files by a basename pattern.
 *
 * @author Kris Wallsmith <kris.wallsmith@gmail.com>
 * @access private
 */
class DirectoryResourceFilterIterator extends \RecursiveFilterIterator {
  protected $pattern;
  public function __construct(\RecursiveDirectoryIterator $iterator, $pattern = null) {
    parent::__construct($iterator);
    $this->pattern = $pattern;
  }
  public function accept() {
    $file = $this
      ->current();
    $name = $file
      ->getBasename();
    if ($file
      ->isDir()) {
      return '.' != $name[0];
    }
    else {
      return null === $this->pattern || 0 < preg_match($this->pattern, $name);
    }
  }
  public function getChildren() {
    return new self(new \RecursiveDirectoryIterator($this
      ->current()
      ->getPathname(), \RecursiveDirectoryIterator::FOLLOW_SYMLINKS), $this->pattern);
  }

}