Language Changes

lib/api/interceptors/auth_interceptor.dart

@@ -0,0 +1,56 @@
+import 'package:dio/dio.dart';
+import '../../data/repositories/auth_repository.dart';
+
+class AuthInterceptor extends Interceptor {
+  final AuthRepository _authRepository;
+  final Dio _dio;
+  
+  AuthInterceptor(this._authRepository, this._dio);
+  
+  @override
+  Future<void> onRequest(
+    RequestOptions options, 
+    RequestInterceptorHandler handler,
+  ) async {
+    // Skip auth header for login and refresh endpoints
+    if (options.path.contains('/login') ||
+        options.path.contains('/auth/refresh')) {
+      return handler.next(options);
+    }
+    
+    // Get token and add to request
+    final token = await _authRepository.getAccessToken();
+    if (token != null) {
+      options.headers['Authorization'] = 'Bearer $token';
+    }
+    
+    return handler.next(options);
+  }
+  
+  @override
+  Future<void> onError(
+    DioException err, 
+    ErrorInterceptorHandler handler,
+  ) async {
+    // Handle 401 errors by refreshing token and retrying
+    if (err.response?.statusCode == 401) {
+      // On 401, try to get a new token
+      final token = await _authRepository.getAccessToken();
+      
+      if (token != null) {
+        // If we have a new token, retry the request
+        final opts = err.requestOptions;
+        opts.headers['Authorization'] = 'Bearer $token';
+        
+        try {
+          final response = await _dio.fetch(opts);
+          return handler.resolve(response);
+        } on DioException catch (e) {
+          return handler.next(e);
+        }
+      }
+    }
+    
+    return handler.next(err);
+  }
+}