first commit

lib/modules/auth/refresh_token/data/datasources/auth_remote_datasource.dart

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+import 'package:dio/dio.dart';
+import 'package:frontend_eccp_mobile/app/core/config/app_environment.dart';
+import 'package:frontend_eccp_mobile/app/core/network/api_endpoint.dart';
+import 'package:frontend_eccp_mobile/app/core/utils/session_manager.dart';
+import 'package:frontend_eccp_mobile/modules/auth/refresh_token/data/model/refresh_token_response.dart';
+import 'package:injectable/injectable.dart';
+
+@lazySingleton
+class AuthRemoteDataSource {
+  final Dio _dio = Dio(
+    BaseOptions(
+      baseUrl: AppEnvironment.baseUrl,
+    ),
+  );
+
+  Future<RefreshTokenResponse> refreshToken() async {
+    final token = await SessionManager.getRefreshToken();
+    final response = await _dio.post<Map<String, dynamic>>(
+      ApiEndpoint.refreshToken,
+      data: {'refresh_token': token},
+    );
+
+    final data = response.data;
+    if (data == null) {
+      throw Exception('EMPTY_RESPONSE');
+    }
+
+    return RefreshTokenResponse.fromJson(data);
+  }
+}

lib/modules/auth/refresh_token/data/model/refresh_token_response.dart

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+class RefreshTokenResponse {
+  RefreshTokenResponse({
+    required this.status,
+    required this.message,
+    required this.accessToken,
+    required this.refreshToken,
+    required this.tokenType,
+    required this.expiresIn,
+  });
+
+  factory RefreshTokenResponse.fromJson(Map<String, dynamic> json) {
+    final data = json['data'] as Map<String, dynamic>? ?? {};
+
+    return RefreshTokenResponse(
+      status: json['status']?.toString() ?? '',
+      message: json['message']?.toString() ?? '',
+      accessToken: data['access_token']?.toString() ?? '',
+      refreshToken: data['refresh_token']?.toString() ?? '',
+      tokenType: data['token_type']?.toString() ?? '',
+      expiresIn: int.tryParse(data['expires_in']?.toString() ?? '0') ?? 0,
+    );
+  }
+
+  final String status;
+  final String message;
+  final String accessToken;
+  final String refreshToken;
+  final String tokenType;
+  final int expiresIn;
+}

lib/modules/auth/refresh_token/data/repositories/auth_repository.dart

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+import 'package:frontend_eccp_mobile/modules/auth/refresh_token/data/datasources/auth_remote_datasource.dart';
+import 'package:frontend_eccp_mobile/modules/auth/refresh_token/data/model/refresh_token_response.dart';
+import 'package:injectable/injectable.dart';
+
+@lazySingleton
+class AuthRepository {
+  AuthRepository(this._remoteDatasource);
+
+  final AuthRemoteDataSource _remoteDatasource;
+
+  Future<RefreshTokenResponse> refreshToken() async {
+    final response = await _remoteDatasource.refreshToken();
+
+    if (response.status != 'success') {
+      throw Exception(response.message);
+    }
+
+    return response;
+  }
+}