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class crumbs_ParentFinder in Crumbs, the Breadcrumbs suite 7.2

Same name and namespace in other branches
  1. 6.2 crumbs.trail.inc \crumbs_ParentFinder
  2. 7 lib/ParentFinder.php \crumbs_ParentFinder

Can find a parent path for a given path. Contains a cache.

Hierarchy

Expanded class hierarchy of crumbs_ParentFinder

File

lib/ParentFinder.php, line 8

View source
class crumbs_ParentFinder {

  /**
   * @var crumbs_PluginSystem_PluginEngine
   */
  protected $pluginEngine;

  /**
   * @var crumbs_Router;
   */
  protected $router;

  /**
   * @var array
   *   Cached parent paths
   */
  protected $parents = array();

  /**
   * @param crumbs_PluginSystem_PluginEngine $pluginEngine
   * @param crumbs_Router $router
   */
  function __construct($pluginEngine, $router) {
    $this->pluginEngine = $pluginEngine;
    $this->router = $router;
  }

  /**
   * @param string $path
   * @param array|null &$item
   *
   * @return string
   */
  function getParentPath($path, &$item) {
    if (!isset($this->parents[$path])) {
      $parent_path = $this
        ->_findParentPath($path, $item);
      if (is_string($parent_path)) {
        $parent_path = $this->router
          ->getNormalPath($parent_path);
      }
      $this->parents[$path] = $parent_path;
    }
    return $this->parents[$path];
  }

  /**
   * @param string $path
   * @param array|null &$item
   *
   * @return string|bool
   */
  protected function _findParentPath($path, &$item) {
    if ($item) {
      if (!$item['access']) {

        // Parent should be the front page.
        return FALSE;
      }
      $parent_path = $this->pluginEngine
        ->findParent($path, $item);
      if (isset($parent_path)) {
        return $parent_path;
      }
    }

    // fallback: chop off the last fragment of the system path.
    $parent_path = $this->router
      ->reducePath($path);
    return isset($parent_path) ? $parent_path : FALSE;
  }

}

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