From 2ab4e8b40a96f4cf1f07c5a27e7ae31ce887765f Mon Sep 17 00:00:00 2001
From: Alex van Andel <me@alexvanandel.com>
Date: Wed, 26 Mar 2025 23:24:38 +0000
Subject: [PATCH] fix: support Stripe subscription items (#20389)

* fix: Implement backwards compatible stripe change to customer.subscription.deleted

* Further handling, including price -> plan change
---
 .../webhook/_customer.subscription.deleted.ts | 23 +++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/packages/features/ee/billing/api/webhook/_customer.subscription.deleted.ts b/packages/features/ee/billing/api/webhook/_customer.subscription.deleted.ts
index 383c3a144f..0e3c5bdd2b 100644
--- a/packages/features/ee/billing/api/webhook/_customer.subscription.deleted.ts
+++ b/packages/features/ee/billing/api/webhook/_customer.subscription.deleted.ts
@@ -9,10 +9,25 @@ const STRIPE_TEAM_PRODUCT_ID = process.env.STRIPE_TEAM_PRODUCT_ID || "";
 
 const stripeWebhookProductHandler = (handlers: Handlers) => async (data: Data) => {
   const subscription = data.object;
-  // @ts-expect-error - we know subscription.plan.product is defined when unsubscribing
-  const productId = subscription.plan.product; // prod_xxxxx
-
-  const handlerGetter = handlers[productId];
+  let productId: string | null = null;
+  // @ts-expect-error - support legacy just in case.
+  if (subscription.plan) {
+    // @ts-expect-error - we know subscription.plan.product is defined when unsubscribing
+    productId = subscription.plan.product; // prod_xxxxx
+  } else {
+    const subscriptionItem = subscription.items?.data?.[0];
+    if (!subscriptionItem) {
+      throw new Error("Subscription item and plan missing");
+    }
+    const product = subscription.items.data[0]?.plan.product;
+    if (product) {
+      productId = typeof product === "string" ? product : product.id;
+    }
+  }
+  if (typeof productId !== "string") {
+    throw new Error(`Unable to determine Product ID from subscription: ${subscription.id}`);
+  }
+  const handlerGetter = handlers[productId as any];
   if (!handlerGetter) throw new HttpCode(202, `No product handler found for product: ${productId}`);
   const handler = (await handlerGetter())?.default;
   // auto catch unsupported Stripe products.