از Appwrite و Flutter برای ایجاد یک سرویس کیف پول موبایل بدون سرور استفاده کنید

git clone https://github.com/Mr-Malomz/mobile_wallet.git

flutter pub get

flutter run

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.mobile_wallet">
    <uses-permission android:name="android.permission.INTERNET"/>
    <application ...>
    <activity android:name="com.linusu.mobile_wallet.CallbackActivity" android:exported="true">
      <intent-filter android:label="mobile_wallet">
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />
        <data android:scheme="appwrite-callback-[PROJECT_ID]" />
      </intent-filter>
    </activity>
  </application>
</manifest>

class AppConstant {
  final String databaseId = "REPLACE WITH DATABASE ID";
  final String projectId = "REPLACE WITH PROJECT ID";
  final String userCollectionId = "REPLACE WITH USERS COLLECTION ID";
  final String transactionCollectionId = "REPLACE WITH TRANSACTIONS COLLECTION ID";
  final String userId = "REPLACE WITH SAMPLE ID";
  final String endpoint = "ENDPOINT";
}

class User {
  String? $id;
  String name;
  int balance;

  User({this.$id, required this.name, required this.balance});

  Map<dynamic, dynamic> toJson() {
    return {"name": name, "balance": balance};
  }

  factory User.fromJson(Map<dynamic, dynamic> json) {
    return User(
        $id: json['\$id'], name: json['name'], balance: json['balance']);
  }
}

class Transaction {
  String? $id;
  String userId;
  String name;
  String paymentMethod;
  int amount;

  Transaction({
    this.$id,
    required this.userId,
    required this.name,
    required this.paymentMethod,
    required this.amount,
  });

  Map<dynamic, dynamic> toJson() {
    return {
      "userId": userId,
      "name": name,
      "paymentMethod": paymentMethod,
      "amount": amount
    };
  }

  factory Transaction.fromJson(Map<dynamic, dynamic> json) {
    return Transaction(
        userId: json['userId'],
        name: json['name'],
        paymentMethod: json['paymentMethod'],
        amount: json['amount']);
  }
}

final String endpoint = "http://10.0.2.2/v1";

import 'package:appwrite/appwrite.dart';
import 'package:mobile_wallet/utils.dart';

class WalletService {
  Client _client = Client();
  Databases? _db;

  WalletService() {
    _init();
  }

  //initialize the application
  _init() async {
    _client
        .setEndpoint(AppConstant().endpoint)
        .setProject(AppConstant().projectId);
    _db = Databases(_client);

    //get current session
    Account account = Account(_client);
    try {
      await account.get();
    } on AppwriteException catch (e) {
      if (e.code == 401) {
        account
            .createAnonymousSession()
            .then((value) => value)
            .catchError((e) => e);
      }
    }
  }
}

//imports go here

class WalletService {
  Client _client = Client();
  Databases? _db;

  WalletService() {
    _init();
  }

  //initialize the application
  _init() async {
    //init code goes here
  }

  Future<User> getUserDetails() async {
    try {
      var data = await _db?.getDocument(
          databaseId: AppConstant().databaseId,
          collectionId: AppConstant().userCollectionId,
          documentId: AppConstant().userId);
      var user = data?.convertTo((doc) => User.fromJson(doc));
      return user!;
    } catch (e) {
      throw Exception('Error getting user details');
    }
  }

  Future updateUserBalance(
    String userId,
    String name,
    int balance,
    int amount,
  ) async {
    int newBalance = balance - amount;
    try {
      User updatedUserBalance = User(name: name, balance: newBalance);
      var result = await _db?.updateDocument(
          databaseId: AppConstant().databaseId,
          collectionId: AppConstant().userCollectionId,
          documentId: userId,
          data: updatedUserBalance.toJson());
      return result;
    } catch (e) {
      throw Exception('Error updating user balance!');
    }
  }

  Future createTransaction(String userId, int amount) async {
    try {
      Transaction updatedTransaction = Transaction(
        userId: userId,
        name: "Stamp duty",
        paymentMethod: "internet payment",
        amount: amount,
      );
      var data = await _db?.createDocument(
        databaseId: AppConstant().databaseId,
        collectionId: AppConstant().transactionCollectionId,
        documentId: ID.unique(),
        data: updatedTransaction.toJson(),
      );
      return data;
    } catch (e) {
      throw Exception('Error creating transaction!');
    }
  }

  Future<List<Transaction>> getTransactions() async {
    try {
      var data = await _db?.listDocuments(
        databaseId: AppConstant().databaseId,
        collectionId: AppConstant().transactionCollectionId,
        queries: [Query.orderDesc('userId')],
      );
      var transactionList = data?.documents
          .map((transaction) => Transaction.fromJson(transaction.data))
          .toList();
      return transactionList!;
    } catch (e) {
      throw Exception('Error getting list of transactions!');
    }
  }
}

import 'package:flutter/material.dart';
import 'package:mobile_wallet/screens/transactions.dart';
import 'package:mobile_wallet/utils.dart';
import 'package:mobile_wallet/wallet_service.dart';

class Home extends StatefulWidget {
  const Home({super.key});
  @override
  State<Home> createState() => _HomeState();
}

class _HomeState extends State<Home> {
  late User user;
  bool _isLoading = false;
  bool _isTransacting = false;
  bool _isError = false;

  @override
  void initState() {
    _getUserDetails();
    super.initState();
  }

  _getUserDetails() {
    setState(() {
      _isLoading = true;
    });
    WalletService().getUserDetails().then((value) {
      setState(() {
        user = value;
        _isLoading = false;
      });
    }).catchError((e) {
      setState(() {
        _isLoading = false;
        _isError = true;
      });
    });
  }

  _createTransaction(String userId, String name, int balance) {
    setState(() {
      _isTransacting = true;
    });
    int amount = 20;
    WalletService().createTransaction(userId, amount).then((value) {
      WalletService()
          .updateUserBalance(userId, name, balance, amount)
          .then((value) {
        //update balance in app
        int newBalance = user.balance - amount;
        setState(() {
          _isTransacting = false;
          user.balance = newBalance;
        });
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Transaction created successfully!')),
        );
      }).catchError((e) {
        setState(() {
          _isTransacting = false;
        });
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Error creating transaction!')),
        );
      });
    }).catchError((e) {
      setState(() {
        _isTransacting = false;
      });
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('Error creating transaction!')),
      );
    });
  }

  @override
  Widget build(BuildContext context) {
    //UI code goes here
  }
}

//import goes here

class Home extends StatefulWidget {
  //code goes here
}

class _HomeState extends State<Home> {
  //states goes here

  @override
  void initState() {
    _getUserDetails();
    super.initState();
  }

  _getUserDetails() {
    //code goes here
  }

  _createTransaction(String userId, String name, int balance) {
    //code goes here
  }

  @override
  Widget build(BuildContext context) {
    return _isLoading
        ? const Center(
            child: CircularProgressIndicator(
            color: Colors.blue,
          ))
        : _isError
            ? const Center(
                child: Text(
                  'Error getting users details',
                  style: TextStyle(
                    color: Colors.red,
                    fontWeight: FontWeight.bold,
                  ),
                ),
              )
            : Scaffold(
                backgroundColor: Colors.white,
                body: Center(
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.center,
                    crossAxisAlignment: CrossAxisAlignment.center,
                    children: [
                      Image.asset('images/wallet.jpg'),
                      const SizedBox(height: 40.0),
                      const Text(
                        'WALLET BALANCE',
                        style: TextStyle(
                            fontSize: 12.0, fontWeight: FontWeight.w500),
                      ),
                      const SizedBox(height: 5.0),
                      Text(
                        '\$ ${user.balance}',
                        style: TextStyle(
                            fontSize: 32.0, fontWeight: FontWeight.bold),
                      ),
                      const SizedBox(height: 40.0),
                      Padding(
                        padding: const EdgeInsets.symmetric(horizontal: 10.0),
                        child: Row(
                          mainAxisAlignment: MainAxisAlignment.center,
                          children: [
                            OutlinedButton(
                              onPressed: () {
                                Navigator.push(
                                  context,
                                  MaterialPageRoute(
                                      builder: (context) =>
                                          const Transactions()),
                                );
                              },
                              child: Text(
                                'View transactions',
                                style: TextStyle(
                                    fontSize: 12.0,
                                    fontWeight: FontWeight.bold,
                                    color: Colors.black),
                              ),
                              style: ButtonStyle(
                                shape: MaterialStateProperty.all(
                                  RoundedRectangleBorder(
                                    borderRadius: BorderRadius.circular(5.0),
                                  ),
                                ),
                                side: MaterialStateProperty.all(
                                  const BorderSide(
                                      color: Colors.black,
                                      width: 1.5,
                                      style: BorderStyle.solid),
                                ),
                              ),
                            ),
                            const SizedBox(width: 20.0),
                            TextButton(
                              onPressed: _isTransacting
                                  ? null
                                  : () {
                                      _createTransaction(
                                        user.$id.toString(),
                                        user.name,
                                        user.balance,
                                      );
                                    },
                              child: Text(
                                'Spend from wallet',
                                style: TextStyle(
                                    fontSize: 12.0,
                                    fontWeight: FontWeight.bold,
                                    color: Colors.white),
                              ),
                              style: ButtonStyle(
                                  backgroundColor:
                                      MaterialStateProperty.all(Colors.black),
                                  side: MaterialStateProperty.all(
                                    const BorderSide(
                                        color: Colors.black,
                                        width: 1.5,
                                        style: BorderStyle.solid),
                                  ),
                                  padding:
                                      MaterialStateProperty.all<EdgeInsets>(
                                    const EdgeInsets.symmetric(
                                        horizontal: 15.0),
                                  )),
                            ),
                          ],
                        ),
                      )
                    ],
                  ),
                ),
              );
  }
}

import 'package:flutter/material.dart';
import 'package:mobile_wallet/utils.dart';
import 'package:mobile_wallet/wallet_service.dart';

class Transactions extends StatefulWidget {
  const Transactions({super.key});
  @override
  State<Transactions> createState() => _TransactionsState();
}
class _TransactionsState extends State<Transactions> {
  late List<Transaction> transaction;
  bool _isLoading = false;
  bool _isError = false;

  @override
  void initState() {
    _getTransactions();
    super.initState();
  }

  _getTransactions() {
    setState(() {
      _isLoading = true;
    });
    WalletService().getTransactions().then((value) {
      setState(() {
        transaction = value;
        _isLoading = false;
      });
    }).catchError((e) {
      setState(() {
        _isLoading = false;
        _isError = true;
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    return _isLoading
        ? const Center(
            child: CircularProgressIndicator(
            color: Colors.blue,
          ))
        : _isError
            ? const Center(
                child: Text(
                  'Error getting list of transactions',
                  style: TextStyle(
                    color: Colors.red,
                    fontWeight: FontWeight.bold,
                  ),
                ),
              )
            : Scaffold(
                appBar: AppBar(
                  title: const Text('Transactions'),
                  backgroundColor: Colors.black,
                ),
                body: ListView.builder(
                  itemCount: transaction.length,
                  itemBuilder: (context, index) {
                    return Container(
                      decoration: const BoxDecoration(
                        border: Border(
                          bottom: BorderSide(width: .5, color: Colors.grey),
                        ),
                      ),
                      padding: EdgeInsets.fromLTRB(10, 20, 10, 20),
                      child: Row(
                        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                        children: [
                          Expanded(
                            flex: 7,
                            child: Column(
                              crossAxisAlignment: CrossAxisAlignment.start,
                              children: [
                                Text(
                                  transaction[index].name,
                                  style: TextStyle(
                                      color: Colors.black,
                                      fontWeight: FontWeight.w800),
                                ),
                                SizedBox(height: 10.0),
                                Text(transaction[index].paymentMethod)
                              ],
                            ),
                          ),
                          Column(
                            crossAxisAlignment: CrossAxisAlignment.end,
                            children: [
                              SizedBox(height: 10.0),
                              Text('\$ ${transaction[index].amount}')
                            ],
                          ),
                        ],
                      ),
                    );
                  },
                ),
              );
  }
}

flutter run