mchess-client/lib/api/websocket_message.dart

import 'package:mchess/api/move.dart';

enum MessageType {
  boardState,
  move,
  invalidMove,
  colorDetermined;

  String toJson() => name;
  static MessageType fromJson(String json) => values.byName(json);
}

enum ApiColor {
  black,
  white;

  String toJson() => name;
  static ApiColor fromJson(String json) => values.byName(json);
}

class ApiWebsocketMessage {
  final MessageType type;
  final ApiMove? move;
  final ApiColor? turnColor;
  final ApiColor? playerColor;
  final String? reason;
  final String? position;
  final ApiCoordinate? squareInCheck;

  ApiWebsocketMessage({
    required this.type,
    required this.move,
    required this.turnColor,
    required this.playerColor,
    required this.reason,
    required this.position,
    required this.squareInCheck,
  });

  factory ApiWebsocketMessage.fromJson(Map<String, dynamic> json) {
    final type = MessageType.fromJson(json['messageType']);
    ApiWebsocketMessage ret;
    switch (type) {
      case MessageType.boardState:
        ret = ApiWebsocketMessage(
          type: type,
          move: ApiMove.fromJson(json['move']),
          turnColor: ApiColor.fromJson(json['turnColor']),
          reason: null,
          position: json['position'],
          squareInCheck: null,
          playerColor: ApiColor.fromJson(json['playerColor']),
        );
      case MessageType.colorDetermined:
        ret = ApiWebsocketMessage(
          type: type,
          move: null,
          turnColor: null,
          reason: null,
          position: null,
          squareInCheck: null,
          playerColor: ApiColor.fromJson(json['playerColor']),
        );
        break;
      case MessageType.move:
        ret = ApiWebsocketMessage(
            type: type,
            move: ApiMove.fromJson(json['move']),
            turnColor: null,
            reason: null,
            position: json['position'],
            squareInCheck: json['squareInCheck'],
            playerColor: null);
        break;
      case MessageType.invalidMove:
        ret = ApiWebsocketMessage(
          type: type,
          move: ApiMove.fromJson(json['move']),
          turnColor: null,
          reason: json['reason'],
          position: null,
          squareInCheck: json['squareInCheck'],
          playerColor: null,
        );
    }
    return ret;
  }

  Map<String, dynamic> toJson() => {
        'messageType': type,
        'move': move,
        'color': turnColor,
      };
}