added wallet functionality

lib/screens/accounts/account_provider.dart

@@ -0,0 +1,101 @@
+import 'package:dio/dio.dart';
+import 'package:flutter/foundation.dart';
+import 'package:qpay/http/http.dart';
+import 'package:qpay/models/api_response.dart';
+import 'package:qpay/screens/accounts/models/account_model.dart';
+import 'package:qpay/screens/accounts/models/statement_model.dart';
+
+class AccountProvider extends ChangeNotifier {
+  final Http http = Http();
+
+  AccountProvider();
+
+  AccountModel? _account;
+  StatementModel? _statement;
+  bool _isLoadingAccount = false;
+  bool _isLoadingStatement = false;
+  String? _accountError;
+  String? _statementError;
+
+  AccountModel? get account => _account;
+  StatementModel? get statement => _statement;
+  bool get isLoadingAccount => _isLoadingAccount;
+  bool get isLoadingStatement => _isLoadingStatement;
+  String? get accountError => _accountError;
+  String? get statementError => _statementError;
+
+  Future<ApiResponse<AccountModel>> fetchAccount(String phoneNumber) async {
+    _isLoadingAccount = true;
+    _accountError = null;
+    notifyListeners();
+
+    try {
+      Map<String, dynamic> response = await http.get(
+        '/accounts/phone/$phoneNumber',
+      );
+
+      _account = AccountModel.fromJson(response);
+      _isLoadingAccount = false;
+      notifyListeners();
+      return ApiResponse.success(_account!);
+    } on DioException catch (e, s) {
+      logger.e(s);
+      _isLoadingAccount = false;
+      _accountError = 'Failed to fetch account. Please try again.';
+      notifyListeners();
+      return ApiResponse.failure(_accountError!);
+    } catch (e, s) {
+      logger.e(s);
+      _isLoadingAccount = false;
+      _accountError = 'An unexpected error occurred. Please try again.';
+      notifyListeners();
+      return ApiResponse.failure(_accountError!);
+    }
+  }
+
+  Future<ApiResponse<StatementModel>> fetchStatement({
+    required String phoneNumber,
+    required String startDate,
+    required String endDate,
+  }) async {
+    _isLoadingStatement = true;
+    _statementError = null;
+    notifyListeners();
+
+    try {
+      Map<String, dynamic> response = await http.get(
+        '/accounts/phone/$phoneNumber/statement'
+        '?startDate=$startDate&endDate=$endDate',
+      );
+
+      _statement = StatementModel.fromJson(response);
+      _isLoadingStatement = false;
+      notifyListeners();
+      return ApiResponse.success(_statement!);
+    } on DioException catch (e, s) {
+      logger.e(s);
+      _isLoadingStatement = false;
+      _statementError = 'Failed to fetch statement. Please try again.';
+      notifyListeners();
+      return ApiResponse.failure(_statementError!);
+    } catch (e, s) {
+      logger.e(s);
+      _isLoadingStatement = false;
+      _statementError = 'An unexpected error occurred. Please try again.';
+      notifyListeners();
+      return ApiResponse.failure(_statementError!);
+    }
+  }
+
+  void clearAccount() {
+    _account = null;
+    _accountError = null;
+    notifyListeners();
+  }
+
+  void clearStatement() {
+    _statement = null;
+    _statementError = null;
+    notifyListeners();
+  }
+}