towards mroe robust backend transactions

backend/src/payments/payment_handler.py

@@ -5,6 +5,7 @@ from datetime import datetime, timedelta
 
 import requests
 from pydantic import BaseModel, Field, field_validator
+from fastapi.responses import RedirectResponse
 
 from ..configuration.environment import Environment
 from ..cache import CreditCache, make_credit_cache_key
@@ -268,8 +269,11 @@ class PaypalClient:
                     }
                 }
             ],
+            # No redirect from paypal
             'application_context': {
-                'return_url': return_url_success,
+                # 'return_url': f'https://anydev.info/orders/{json.loads(order_response.text)["id"]}/{order_request.user_id}capture',   # This returns to backend capture-payment URL
+                # 'cancel_url': return_url_failure
+                'return_url': 'https://anydev.info/api/paypal/capture',
                 'cancel_url': return_url_failure
             }
         }
@@ -289,10 +293,16 @@ class PaypalClient:
             self.logger.error(f'Error creating PayPal order: {exc}')
             return None
 
-        order_response.raise_for_status()
+        try: 
+            order_response.raise_for_status()
+        except:
+            return RedirectResponse(url=return_url_failure)
+
+        user_id = order_request.user_id
+        order_id = json.loads(order_response.text)["id"]
 
         # TODO Now that we have the order ID, we can inscribe the details in sql database using the order id given by paypal
-        # DB for storing the transactions:
+        # DB for storing the transaction records:
 
         # order_id (key): json.loads(order_response.text)["id"]
         # user_id       : order_request.user_id
@@ -305,12 +315,13 @@ class PaypalClient:
 
         # Create a cache item for credits to be granted to user
         CreditCache.set_credits(
-            user_id  = order_request.user_id,
+            user_id  = user_id,
-            order_id = json.loads(order_response.text)["id"],
+            order_id = order_id,
             credits_to_grant = order_request.total_credits)
 
 
-        return order_response.json()
+        # return order_response.json()
+        return RedirectResponse(url=f'https://anydev.info/orders/{order_id}/{user_id}capture')
 
 
     # Standalone function to capture a payment

backend/src/payments/payment_router.py

@@ -2,6 +2,7 @@ import logging
 from typing import Literal
 
 from fastapi import APIRouter, Query, Body
+from fastapi.responses import RedirectResponse
 from ..payments import PaypalClient, OrderRequest
 from ..supabase.supabase import SupabaseClient
 from ..cache import CreditCache, make_credit_cache_key
@@ -24,8 +25,8 @@ def create_order(
         user_id: str            = Query(...),
         basket: list            = Query(...),
         currency: str           = Query(...),
-        return_url_success: str = Query('https://anydev.info'),
+        return_url_success: str = Query('https://anydev.info/orders/success'),
-        return_url_failure: str = Query('https://anydev.info')
+        return_url_failure: str = Query('https://anydev.info/orders/failed')
     ):
     """
     Creates a new PayPal order.
@@ -47,7 +48,10 @@ def create_order(
     )
 
     # Process the order and return the details
-    return paypal_client.order(order_request=order, return_url_success=return_url_success, return_url_failure=return_url_failure)
+    return paypal_client.order(
+        order_request=order,
+        return_url_success=return_url_success,
+        return_url_failure=return_url_failure)
 
 
 
@@ -72,11 +76,12 @@ def capture_order(order_id: str, user_id: str):
             user_id=user_id,
             amount=credits
         )
-        logger.info('Payment capture succeeded: incrementing balance of user {user_id} by {credits}.')
+        logger.info(f'Payment capture succeeded: incrementing balance of user {user_id} by {credits}.')
-    else:
+        return RedirectResponse(url='https://anydev.info/orders/success')
-        logger.error('Capture payment failed. Could not find cache key for user {user_id} and order {order_id}')
+    
+    logger.error(f'Capture payment failed. Could not find cache key for user {user_id} and order {order_id}')
 
-    return result
+    return RedirectResponse(url='https://anydev.info/orders/failed')