GeocodeData constructor

Implementation

GeocodeData(
  String inputString,
  String featureNameHeader,
  String stateHeader,
  String latitudeHeader,
  String longitudeHeader, {
  this.numMarkers = 1,
  String fieldDelimiter = defaultFieldDelimiter,
  String textDelimiter = defaultTextDelimiter,
  String eol = defaultEol,
}) {
  var rowsAsListOfValues = const CsvToListConverter().convert(
    inputString,
    fieldDelimiter: fieldDelimiter,
    textDelimiter: textDelimiter,
    eol: eol,
    shouldParseNumbers: false,
  );

  _featureNameHeaderSN =
      rowsAsListOfValues[0].indexWhere((x) => x == featureNameHeader);
  _stateHeaderSN = rowsAsListOfValues[0].indexWhere((x) => x == stateHeader);
  _latitudeHeaderSN =
      rowsAsListOfValues[0].indexWhere((x) => x == latitudeHeader);
  _longitudeHeaderSN =
      rowsAsListOfValues[0].indexWhere((x) => x == longitudeHeader);

  if (_featureNameHeaderSN == -1 ||
      _stateHeaderSN == -1 ||
      _latitudeHeaderSN == -1 ||
      _longitudeHeaderSN == -1) {
    throw Exception('Some of header is not find in file');
  }

  var locations = rowsAsListOfValues
      .sublist(1)
      .map((model) => LocationData(
          model[_featureNameHeaderSN],
          model[_stateHeaderSN],
          double.tryParse(model[_latitudeHeaderSN].toString()) ?? -1,
          double.tryParse(model[_longitudeHeaderSN].toString()) ?? -1))
      .map((model) => model.toJson())
      .toList();
  _kdTree = KDTree(locations, _distance, ['latitude', 'longitude']);
}