launchMap function

dynamic launchMap(Uri? uri)

Implementation

launchMap(Uri? uri) async {
  if (uri == null) {
    throw 'No URI provided.';
  }

  final availableMaps = await MapLauncher.installedMaps;
  if (availableMaps.isEmpty) {
    throw 'No map applications are installed on the device.';
  }

  Position position;
  try {
    position = await determinePosition();
  } catch (e) {
    throw 'Unable to determine current position: $e';
  }

  Map<String, String>? queryParameters = uri.queryParameters;
  if (queryParameters["method"] == "showDirections") {
    String? destination = queryParameters["destination"];
    if (destination == null || !destination.contains(',')) {
      throw 'Invalid or missing destination coordinates.';
    }

    double latitude, longitude;
    try {
      latitude = double.parse(destination.split(",")[0]);
      longitude = double.parse(destination.split(",")[1]);
    } catch (e) {
      throw 'Error parsing destination coordinates: $e';
    }

    if (latitude < -90 ||
        latitude > 90 ||
        longitude < -180 ||
        longitude > 180) {
      throw 'Invalid latitude or longitude values.';
    }

    await availableMaps.first.showDirections(
      destination: Coords(latitude, longitude),
      origin: Coords(position.latitude, position.longitude),
    );
  } else {
    throw 'Unsupported method in URI.';
  }
}