feat: implement backend API clients for multi-marketplace integration and frontend service layer

backend/test_ae_api.py

@@ -0,0 +1,53 @@
+import os
+import sys
+from dotenv import load_dotenv
+
+# Add parent dir to path so we can import backend packages
+sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from backend.ae_api import AliExpressAPI
+from backend.ae_api.exceptions import AEAPIError
+
+def test_ae_api():
+    # Load environment variables
+    env_path = os.path.join(os.path.dirname(__file__), '.env')
+    load_dotenv(env_path)
+    
+    # Check if key is loaded
+    api_token = os.getenv('AE_API_TOKEN')
+    user_id = os.getenv('AE_USER_ID')
+    
+    if not api_token:
+        print("Error: AE_API_TOKEN must be in backend/.env")
+        return
+        
+    print(f"Initializing AliExpressAPI...")
+    if not user_id:
+        print("Warning: AE_USER_ID not provided. Transactions API might fail.")
+
+    api = AliExpressAPI()
+    
+    try:
+        # Test 1: Get Products Feeds (doesn't require user_id in URL)
+        print("\n--- Testing Products Feeds API ---")
+        feeds_response = api.products.get_products_feeds(limit=5)
+        print("Success! Response keys:", feeds_response.keys())
+        
+        data = feeds_response.get("data", [])
+        print(f"Found {len(data)} feeds.")
+        
+        if user_id:
+            # Test 2: Get Transactions
+            print("\n--- Testing Transactions API ---")
+            transactions_response = api.transactions.get_list(params={"limit": 5})
+            
+            t_data = transactions_response.get("data", [])
+            print(f"Found {len(t_data)} transactions.")
+            
+    except AEAPIError as e:
+        print(f"API Error: {e}")
+    except Exception as e:
+        print(f"Unexpected Error: {e}")
+
+if __name__ == '__main__':
+    test_ae_api()