collab: Prevent canceling the free plan (#31292)

Marshall Bowers created 6 months ago

This PR makes it so the Zed Free plan cannot be canceled.

We were already preventing this on the zed.dev side, but this will make
it more airtight.

Release Notes:

- N/A

Change summary

crates/collab/src/api/billing.rs | 42 +++++++++++++++++++++------------
1 file changed, 26 insertions(+), 16 deletions(-)

Detailed changes

crates/collab/src/api/billing.rs

@@ -269,7 +269,8 @@ async fn list_billing_subscriptions(
                         .and_utc()
                         .to_rfc3339_opts(SecondsFormat::Millis, true)
                 }),
-                is_cancelable: subscription.stripe_subscription_status.is_cancelable()
+                is_cancelable: subscription.kind != Some(SubscriptionKind::ZedFree)
+                    && subscription.stripe_subscription_status.is_cancelable()
                     && subscription.stripe_cancel_at.is_none(),
             })
             .collect(),
@@ -591,23 +592,32 @@ async fn manage_billing_subscription(
             }),
             ..Default::default()
         }),
-        ManageSubscriptionIntent::Cancel => Some(CreateBillingPortalSessionFlowData {
-            type_: CreateBillingPortalSessionFlowDataType::SubscriptionCancel,
-            after_completion: Some(CreateBillingPortalSessionFlowDataAfterCompletion {
-                type_: stripe::CreateBillingPortalSessionFlowDataAfterCompletionType::Redirect,
-                redirect: Some(CreateBillingPortalSessionFlowDataAfterCompletionRedirect {
-                    return_url: format!("{}/account", app.config.zed_dot_dev_url()),
+        ManageSubscriptionIntent::Cancel => {
+            if subscription.kind == Some(SubscriptionKind::ZedFree) {
+                return Err(Error::http(
+                    StatusCode::BAD_REQUEST,
+                    "free subscription cannot be canceled".into(),
+                ));
+            }
+
+            Some(CreateBillingPortalSessionFlowData {
+                type_: CreateBillingPortalSessionFlowDataType::SubscriptionCancel,
+                after_completion: Some(CreateBillingPortalSessionFlowDataAfterCompletion {
+                    type_: stripe::CreateBillingPortalSessionFlowDataAfterCompletionType::Redirect,
+                    redirect: Some(CreateBillingPortalSessionFlowDataAfterCompletionRedirect {
+                        return_url: format!("{}/account", app.config.zed_dot_dev_url()),
+                    }),
+                    ..Default::default()
                 }),
+                subscription_cancel: Some(
+                    stripe::CreateBillingPortalSessionFlowDataSubscriptionCancel {
+                        subscription: subscription.stripe_subscription_id,
+                        retention: None,
+                    },
+                ),
                 ..Default::default()
-            }),
-            subscription_cancel: Some(
-                stripe::CreateBillingPortalSessionFlowDataSubscriptionCancel {
-                    subscription: subscription.stripe_subscription_id,
-                    retention: None,
-                },
-            ),
-            ..Default::default()
-        }),
+            })
+        }
         ManageSubscriptionIntent::StopCancellation => unreachable!(),
     };