PhysiGo/app/lib/navigation/models/directions.dart

import 'package:latlong2/latlong.dart';

class Directions {
  final List<DirectionSegment> segments;
  final List<LatLng> waypointsCoordinates;

  const Directions({required this.segments, required this.waypointsCoordinates});

  factory Directions.fromJson(Map<String, dynamic> json) {
    return Directions(
      segments: _getSegmentsFromJson(json),
      waypointsCoordinates: _getWaypointsCoordinatesFromJson(json),
    );
  }

  static List<DirectionSegment> _getSegmentsFromJson(Map<String, dynamic> json) {
    final segmentsJson = List<Map<String, dynamic>>.from(json['features'][0]['properties']['segments'][0]['steps']);
    final List<DirectionSegment> segments = [];
    for (final segmentJson in segmentsJson) {
      segments.add(DirectionSegment.fromJson(segmentJson));
    }
    return segments;
  }

  static List<LatLng> _getWaypointsCoordinatesFromJson(Map<String, dynamic> json) {
    final coordinatesJson = List.from(json['features'][0]['geometry']['coordinates']);
    final List<LatLng> waypointsCoordinates = [];
    for (final coordinateJson in coordinatesJson) {
      waypointsCoordinates.add(LatLng(coordinateJson[1], coordinateJson[0]));
    }
    return waypointsCoordinates;
  }
}

class DirectionSegment {
  final num distance;
  final num duration;
  final int type;
  final String instruction;
  final List<int> waypoints;

  const DirectionSegment({
    required this.distance,
    required this.duration,
    required this.type,
    required this.instruction,
    required this.waypoints,
  });

  factory DirectionSegment.fromJson(Map<String, dynamic> json) {
    return DirectionSegment(
      distance: json['distance'],
      duration: json['duration'],
      type: json['type'],
      instruction: json['instruction'],
      waypoints: List<int>.from(json['way_points']),
    );
  }
}