import 'package:google_maps_flutter/google_maps_flutter.dart';

class DecodePolyline{
  // !DECODE POLY
  static List decodePoly(String poly) {
    var list = poly.codeUnits;
    var lList = [];
    int index = 0;
    int len = poly.length;
    int c = 0;
    // repeating until all attributes are decoded
    do {
      var shift = 0;
      int result = 0;

      // for decoding value of one attribute
      do {
        c = list[index] - 63;
        result |= (c & 0x1F) << (shift * 5);
        index++;
        shift++;
      } while (c >= 32);
      /* if value is negative then bitwise not the value */
      if (result & 1 == 1) {
        result = ~result;
      }
      var result1 = (result >> 1) * 0.00001;
      lList.add(result1);
    } while (index < len);

    /*adding to previous value as done in encoding */
    for (var i = 2; i < lList.length; i++) {
      lList[i] += lList[i - 2];
    }
    return lList;
  }
  static List<LatLng> convertToLatLng(List points) {
    List<LatLng> result = <LatLng>[];
    for (int i = 0; i < points.length; i++) {
      if (i % 2 != 0) {
        result.add(LatLng(points[i - 1], points[i]));
      }
    }
    return result;
  }
}