handler.php

<?hh

function get_app_to_handle_uri(string $uri): {
  switch ($uri->getProtocol()) {
    case 'itunes':
      return ITUNES_APP;
    case 'irc':
      return IRC_APP;
    case 'https':
      if ($uri->getAuthority()->endsWith('.onion')) {
        return TOR_BROWSER_APP;
      } else {
        return WEB_BROWSER_APP;
      }
  }
}