interface UpdaterInterface

interface UpdaterInterface {

  /**
   * Checks if the project is installed.
   *
   * @return bool
   */
  public function isInstalled();

  /**
   * Returns the system name of the project.
   *
   * @param string $directory
   *  A directory containing a project.
   */
  public static function getProjectName($directory);

  /**
   * Returns the path to the default install location.
   *
   * @return string
   *   An absolute path to the default install location.
   */
  public function getInstallDirectory();

  /**
   * Determines if the Updater can handle the project provided in $directory.
   *
   * @todo Provide something more rational here, like a project spec file.
   *
   * @param string $directory
   *
   * @return bool
   *   TRUE if the project is installed, FALSE if not.
   */
  public static function canUpdateDirectory($directory);

  /**
   * Actions to run after an install has occurred.
   */
  public function postInstall();

  /**
   * Actions to run after an update has occurred.
   */
  public function postUpdate();

}