Method Parse

libs/ge0/geo_url_parser.cpp:158–293

{}

bool GeoParser::Parse(std::string const & raw, GeoURLInfo & info) const
{
  info.Reset();

  /*
   * References:
   * - https://datatracker.ietf.org/doc/html/rfc5870
   * - https://developer.android.com/guide/components/intents-common#Maps
   * - https://developers.google.com/maps/documentation/urls/android-intents
   */

  /*
   * Check that URI starts with geo:
   */
  if (!raw.starts_with("geo:"))
    return false;

  /*
   * Check for trailing `(label)` which is not RFC3986-compliant (thanks, Google).
   */
  size_t end = string::npos;
  if (raw.size() > 2 && raw.back() == ')' && string::npos != (end = raw.rfind('(')))
  {
    // head (label)
    //      ^end
    info.m_label = url::UrlDecode(raw.substr(end + 1, raw.size() - end - 2));
    // Remove any whitespace between `head` and `(`.
    end--;
    while (end > 0 && (raw[end] == ' ' || raw[end] == '+'))
      end--;
  }

  url::Url url(end == string::npos ? raw : raw.substr(0, end + 1));
  if (!url.IsValid())
    return false;
  ASSERT_EQUAL(url.GetScheme(), "geo", ());

  // Fix non-RFC url/hostname, reported by an Android user, with & instead of ?
  std::string_view constexpr kWrongZoomInHost = "&z=";
  if (std::string::npos != url.GetHost().find(kWrongZoomInHost))
  {
    auto fixedUrl = raw;
    fixedUrl.replace(raw.find(kWrongZoomInHost), 1, 1, std::string::value_type{'?'});
    url = url::Url{fixedUrl};
  }

  /*
   * Parse coordinates before ';' character
   */
  std::string coordinates = url.GetHost().substr(0, url.GetHost().find(';'));
  if (!coordinates.empty())
  {
    boost::smatch m;
    if (!boost::regex_match(coordinates, m, m_latlonRe) || m.size() < 3)
    {
      // no match? try URL decoding before giving up
      coordinates = url::UrlDecode(coordinates);
      if (!boost::regex_match(coordinates, m, m_latlonRe) || m.size() < 3)