protected function AliasManager::lookupPathSource

Given an alias, return its Drupal system URL if one exists. Otherwise, return FALSE.

Parameters

$path: The path to investigate for corresponding system URLs.

$langcode: Optional language code to search the path with. Defaults to the page language. If there's no path defined for that language it will search paths without language.

Return value

A Drupal system path, or FALSE if no path was found.

File

drupal/core/lib/Drupal/Core/Path/AliasManager.php, line 254

Contains Drupal\Core\Path\AliasManager.

Class

AliasManager

Namespace

Code

protected function lookupPathSource($path, $langcode) {
  if ($this->whitelist && !isset($this->noSource[$langcode][$path])) {

    // Look for the value $path within the cached $map
    $source = FALSE;
    if (!isset($this->lookupMap[$langcode]) || !($source = array_search($path, $this->lookupMap[$langcode]))) {
      $args = array(
        ':alias' => $path,
        ':langcode' => $langcode,
        ':langcode_undetermined' => LANGUAGE_NOT_SPECIFIED,
      );

      // See the queries above.
      if ($langcode == LANGUAGE_NOT_SPECIFIED) {
        unset($args[':langcode']);
        $result = $this->connection
          ->query("SELECT source FROM {url_alias} WHERE alias = :alias AND langcode = :langcode_undetermined ORDER BY pid DESC", $args);
      }
      elseif ($langcode > LANGUAGE_NOT_SPECIFIED) {
        $result = $this->connection
          ->query("SELECT source FROM {url_alias} WHERE alias = :alias AND langcode IN (:langcode, :langcode_undetermined) ORDER BY langcode DESC, pid DESC", $args);
      }
      else {
        $result = $this->connection
          ->query("SELECT source FROM {url_alias} WHERE alias = :alias AND langcode IN (:langcode, :langcode_undetermined) ORDER BY langcode ASC, pid DESC", $args);
      }
      if ($source = $result
        ->fetchField()) {
        $this->lookupMap[$langcode][$source] = $path;
      }
      else {

        // We can't record anything into $map because we do not have a valid
        // index and there is no need because we have not learned anything
        // about any Drupal path. Thus cache to $no_source.
        $this->noSource[$langcode][$path] = TRUE;
      }
    }
    return $source;
  }
  return FALSE;
}