[Flutter] Clone - 당근마켓32(ItemModel)

이번에는 거래할 아이템을 등록하는 화면을 위한 데이터 모델을 구현해보겠습니다.

개발환경 : 윈도우11, 안드로이드 스튜디오(Arctic Fox | 2020.3.1 Patch 4), flutter 3.0.1

 

일단 모델링만 한 상태이므로 차후에 개발중에 필요한 부분 또는 오류가 발생한 부분이 있다면 추가/수정이 있을수 있습니다.

 

/src/models/item_model.dart 신규 생성 - 2가지 방식으로 생성했고, 둘다 테스트 예정입니다.

 

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:geoflutterfire/geoflutterfire.dart';
import 'dart:convert';

import '../constants/data_keys.dart';

/* 모델링 샘플 데이터
{
"itemKey":"itemKey",
"userKey":"userKey",
"userPhone":"userPhone",
"imageDownloadUrls":["aaa"],
"title":"title",
"category":"category",
"price":0.0,
"negotiable":true,
"detail":"detail",
"address":"address",
"geoFirePoint":"geoFirePoint",
"createdDate":"createdDate",
"reference":"referenc"
}
*/


// https://app.quicktype.io/ 사이트를 이용해서 변환 후, 약간의 수작업,
//     final itemModel2 = itemModel2FromJson(jsonString);

ItemModel2 itemModel2FromJson(String str) => ItemModel2.fromJson(json.decode(str));

String itemModel2ToJson(ItemModel2 data) => json.encode(data.toJson());

class ItemModel2 {
  String itemKey;
  String userKey;
  String userPhone;
  List<String> imageDownloadUrls;
  String title;
  String category;
  int price;
  bool negotiable;
  String detail;
  String address;
  GeoFirePoint geoFirePoint;
  DateTime createdDate;
  DocumentReference? reference;

  ItemModel2({
    required this.itemKey,
    required this.userKey,
    required this.userPhone,
    required this.imageDownloadUrls,
    required this.title,
    required this.category,
    required this.price,
    required this.negotiable,
    required this.detail,
    required this.address,
    required this.geoFirePoint,
    required this.createdDate,
    this.reference,
  });

  factory ItemModel2.fromJson(Map<String, dynamic> json) => ItemModel2(
        itemKey: json["itemKey"] ?? '',
        userKey: json["userKey"] ?? '',
        userPhone: json["userPhone"] ?? '',
        imageDownloadUrls: List<String>.from(json["imageDownloadUrls"].map((x) => x)),
        title: json["title"] ?? '',
        category: json["category"] ?? 'none',
        price: json["price"] ?? 0,
        negotiable: json["negotiable"],
        detail: json["detail"],
        address: json["address"],
        geoFirePoint: json[DOC_GEOFIREPOINT] == null
            ? GeoFirePoint(0, 0)
            : GeoFirePoint((json[DOC_GEOFIREPOINT][DOC_GEOPOINT]).latitude,
                (json[DOC_GEOFIREPOINT][DOC_GEOPOINT]).longitude),
        createdDate: json[DOC_CREATEDDATE] == null
            ? DateTime.now().toUtc()
            : (json[DOC_CREATEDDATE] as Timestamp).toDate(),
        // reference: json["reference"],
      );

  Map<String, dynamic> toJson() => {
        "itemKey": itemKey,
        "userKey": userKey,
        "userPhone": userPhone,
        "imageDownloadUrls": List<dynamic>.from(imageDownloadUrls.map((x) => x)),
        "title": title,
        "category": category,
        "price": price,
        "negotiable": negotiable,
        "detail": detail,
        "address": address,
        "geoFirePoint": geoFirePoint,
        "createdDate": createdDate,
        // "reference": reference,
      };
}


// Json to Dart 플러그인을 이용해서 변환 후, 약간의 수작업,

/// itemKey : "itemKey"
/// userKey : "userKey"
/// userPhone : "userPhone"
/// imageDownloadUrls : ["aaa"]
/// title : "title"
/// category : "category"
/// price : 0.0
/// negotiable : true
/// detail : "detail"
/// address : "address"
/// geoFirePoint : "geoFirePoint"
/// createdDate : "createdDate"
/// reference : "referenc"

class ItemModel {
// late 키워드 없으면 초기화에서 required 선언해도 오류발생함,
  late String itemKey;
  late String userKey;
  late String userPhone;
  late List<String> imageDownloadUrls;
  late String title;
  late String category;
  late num price;
  late bool negotiable;
  late String detail;
  late String address;
  late GeoFirePoint geoFirePoint;
  late DateTime createdDate;
  DocumentReference? reference;

  ItemModel({
    required this.itemKey,
    required this.userKey,
    required this.userPhone,
    required this.imageDownloadUrls,
    required this.title,
    required this.category,
    required this.price,
    required this.negotiable,
    required this.detail,
    required this.address,
    required this.geoFirePoint,
    required this.createdDate,
    this.reference,
  });

  ItemModel.fromJson(Map<String, dynamic> json, this.itemKey, this.reference) {
    itemKey = json['itemKey'] ?? '';
    userKey = json['userKey'] ?? '';
    userPhone = json['userPhone'] ?? '';
    imageDownloadUrls =
        json['imageDownloadUrls'] != null ? json['imageDownloadUrls'].cast<String>() : [];
    title = json['title'] ?? '';
    category = json['category'] ?? 'none';
    price = json['price'] ?? 0;
    negotiable = json['negotiable'] ?? false;
    detail = json['detail'] ?? '';
    address = json['address'] ?? '';
    geoFirePoint = json[DOC_GEOFIREPOINT] == null
        ? GeoFirePoint(0, 0)
        : GeoFirePoint((json[DOC_GEOFIREPOINT][DOC_GEOPOINT]).latitude,
            (json[DOC_GEOFIREPOINT][DOC_GEOPOINT]).longitude);
    createdDate = json[DOC_CREATEDDATE] == null
        ? DateTime.now().toUtc()
        : (json[DOC_CREATEDDATE] as Timestamp).toDate();
    // reference = json['reference'];
  }

// DocumentSnapshot.data 는 null 가능하므로 ! 처리 필요함, doc().get() 인 경우 리턴타입임,
  ItemModel.fromSnapshot(DocumentSnapshot<Map<String, dynamic>> snapshot)
      : this.fromJson(snapshot.data()!, snapshot.id, snapshot.reference);

// QueryDocumentSnapshot.data 는 null 불가능(! 필요없음), collection().get() 인 경우 리턴타입임,
  ItemModel.fromQuerySnapshot(QueryDocumentSnapshot<Map<String, dynamic>> snapshot)
      : this.fromJson(snapshot.data(), snapshot.id, snapshot.reference);

  Map<String, dynamic> toJson() {
    final map = <String, dynamic>{};
    map['itemKey'] = itemKey;
    map['userKey'] = userKey;
    map['userPhone'] = userPhone;
    map['imageDownloadUrls'] = imageDownloadUrls;
    map['title'] = title;
    map['category'] = category;
    map['price'] = price;
    map['negotiable'] = negotiable;
    map['detail'] = detail;
    map['address'] = address;
    map['geoFirePoint'] = geoFirePoint.data;
    map['createdDate'] = createdDate;
    // map['reference'] = reference;
    return map;
  }
}