flutter-webapp-anwendung-tanken/lib/models/tank_model.dart

import 'dart:convert';

class TankModel {
  final String documentId;
  final String userId;
  final String date;
  final String odometer;
  final String liters;
  final String pricePerLiter;
  final String location;
  final String totalPrice;
  TankModel({
    required this.documentId,
    required this.userId,
    required this.date,
    required this.odometer,
    required this.liters,
    required this.pricePerLiter,
    required this.location,
    required this.totalPrice,
  });

  TankModel copyWith({
    String? documentId,
    String? userId,
    String? date,
    String? odometer,
    String? liters,
    String? pricePerLiter,
    String? location,
    String? totalPrice,
  }) {
    return TankModel(
      documentId: documentId ?? this.documentId,
      userId: userId ?? this.userId,
      date: date ?? this.date,
      odometer: odometer ?? this.odometer,
      liters: liters ?? this.liters,
      pricePerLiter: pricePerLiter ?? this.pricePerLiter,
      location: location ?? this.location,
      totalPrice: totalPrice ?? this.totalPrice,
    );
  }

  Map<String, dynamic> toMap() {
    return <String, dynamic>{
      'documentId': documentId,
      'userId': userId,
      'date': date,
      'odometer': odometer,
      'liters': liters,
      'pricePerLiter': pricePerLiter,
      'location': location,
      'totalPrice': totalPrice,
    };
  }

  factory TankModel.fromMap(Map<String, dynamic> map) {
    return TankModel(
      documentId: map['documentId'] as String,
      userId: map['userId'] as String,
      date: map['date'] as String,
      odometer: map['odometer'] as String,
      liters: map['liters'] as String,
      pricePerLiter: map['pricePerLiter'] as String,
      location: map['location'] as String,
      totalPrice: map['totalPrice'] as String,
    );
  }

  String toJson() => json.encode(toMap());

  factory TankModel.fromJson(String source) => TankModel.fromMap(json.decode(source) as Map<String, dynamic>);

  @override
  String toString() {
    return 'TankModel(documentId: $documentId, userId: $userId, date: $date, odometer: $odometer, liters: $liters, pricePerLiter: $pricePerLiter, location: $location, totalPrice: $totalPrice)';
  }

  @override
  bool operator ==(covariant TankModel other) {
    if (identical(this, other)) return true;
  
    return 
      other.documentId == documentId &&
      other.userId == userId &&
      other.date == date &&
      other.odometer == odometer &&
      other.liters == liters &&
      other.pricePerLiter == pricePerLiter &&
      other.location == location &&
      other.totalPrice == totalPrice;
  }

  @override
  int get hashCode {
    return documentId.hashCode ^
      userId.hashCode ^
      date.hashCode ^
      odometer.hashCode ^
      liters.hashCode ^
      pricePerLiter.hashCode ^
      location.hashCode ^
      totalPrice.hashCode;
  }
}