add flutter

ontime_merchant_flutter/lib/features/auth/application/auth_controller.dart

@@ -0,0 +1,77 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:ontime_merchant_flutter/data/api/api_client.dart';
+import 'package:ontime_merchant_flutter/features/auth/data/merchant_auth_api.dart';
+import 'package:ontime_merchant_flutter/features/auth/data/models/merchant_model.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class AuthState {
+  const AuthState({
+    this.merchant,
+    this.isLoading = false,
+    this.errorMessage,
+  });
+
+  final MerchantModel? merchant;
+  final bool isLoading;
+  final String? errorMessage;
+
+  AuthState copyWith({
+    MerchantModel? merchant,
+    bool? isLoading,
+    String? errorMessage,
+  }) {
+    return AuthState(
+      merchant: merchant ?? this.merchant,
+      isLoading: isLoading ?? this.isLoading,
+      errorMessage: errorMessage,
+    );
+  }
+}
+
+final authControllerProvider =
+    StateNotifierProvider<AuthController, AuthState>((ref) => AuthController());
+
+class AuthController extends StateNotifier<AuthState> {
+  AuthController() : super(const AuthState());
+
+  late final MerchantAuthApi _api =
+      MerchantAuthApi(ApiClient(basicAuthUser: null, basicAuthPassword: null));
+
+  Future<void> login({
+    required String noTelepon,
+    required String password,
+    String? fcmToken,
+  }) async {
+    state = state.copyWith(isLoading: true, errorMessage: null);
+    try {
+      final merchant = await _api.login(
+        noTelepon: noTelepon,
+        password: password,
+        fcmToken: fcmToken,
+      );
+      state = state.copyWith(merchant: merchant, isLoading: false);
+      final prefs = await SharedPreferences.getInstance();
+      await prefs.setString('merchant_id_mitra', merchant.idMitra);
+      await prefs.setString('merchant_id_merchant', merchant.idMerchant);
+      await prefs.setString('merchant_phone', merchant.teleponMitra);
+      await prefs.setString('merchant_token', merchant.tokenMerchant);
+    } catch (e) {
+      state = state.copyWith(
+        isLoading: false,
+        errorMessage: e.toString().replaceFirst('Exception: ', ''),
+      );
+    }
+  }
+
+  void logout() {
+    state = const AuthState();
+  }
+
+  static Future<void> clearStored() async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove('merchant_id_mitra');
+    await prefs.remove('merchant_id_merchant');
+    await prefs.remove('merchant_phone');
+    await prefs.remove('merchant_token');
+  }
+}