Fix TypeError in checkout webhook when client_reference_id is None

- Handle case where client_reference_id is None or missing - Fall back
to checking metadata.user_id if client_reference_id not available -
Add try/except for int() conversion with proper error logging - Use
safe .get() for session ID in error messages - Prevents TypeError:
int() argument must be a string when webhook has None value

1 files changed, 15 insertions, 3 deletions

diff --git a/Biz/PodcastItLater/Billing.py b/Biz/PodcastItLater/Billing.py
index a58c1fa..46e67ff 100644
--- a/Biz/PodcastItLater/Billing.py
+++ b/Biz/PodcastItLater/Billing.py
@@ -284,13 +284,25 @@ def handle_webhook_event(payload: bytes, sig_header: str) -> dict[str, str]:
 
 def _handle_checkout_completed(session: dict[str, typing.Any]) -> None:
     """Handle checkout.session.completed event."""
-    user_id = int(session.get("client_reference_id", 0))
+    client_ref = session.get("client_reference_id") or session.get(
+        "metadata",
+        {},
+    ).get("user_id")
     customer_id = session.get("customer")
 
-    if not user_id or not customer_id:
+    if not client_ref or not customer_id:
         logger.warning(
             "Missing user_id or customer_id in checkout session: %s",
-            session["id"],
+            session.get("id", "unknown"),
+        )
+        return
+
+    try:
+        user_id = int(client_ref)
+    except (ValueError, TypeError):
+        logger.warning(
+            "Invalid user_id in checkout session: %s",
+            client_ref,
         )
         return