[Doom - Downgrade] Email ops when subscription cancelation takes effe…

…ct (#2603)

front/lib/email.ts

@@ -107,3 +107,20 @@ export async function sendReactivateSubscriptionEmail(
   };
   return sendEmail(email, reactivateMessage);
 }
+
+export async function sendOpsEmail(workspaceSId: string): Promise<void> {
+  const opsMessage = {
+    from: {
+      name: "System",
+      email: "ops@dust.tt",
+    },
+    subject: `[OPS] A subscription has been canceled`,
+    html: `<p>Hi Dust ops,</p> 
+    <p>The subscription of workspace '${workspaceSId}' was just canceled. Go to the <a href="https://dust.tt/poke/${workspaceSId}">Poke Page</a> and manually delete its connections</p>
+    <p>Also, for the first cancellations, quickly check that users have been properly revoked and the plan switched back to free</p>
+    <p>We'll automate this soon. Just doing that to be extra sure for the ~10 first downgrades.</p>
+    <p>Sincerely,
+    <p>Ourselves</p>`,
+  };
+  return sendEmail("ops@dust.tt", opsMessage);
+}

front/pages/api/stripe/webhook.ts

@@ -8,6 +8,7 @@ import { Authenticator } from "@app/lib/auth";
 import { front_sequelize } from "@app/lib/databases";
 import {
   sendCancelSubscriptionEmail,
+  sendOpsEmail,
   sendReactivateSubscriptionEmail,
 } from "@app/lib/email";
 import { ReturnedAPIErrorType } from "@app/lib/error";
@@ -351,6 +352,7 @@ async function handler(
             // We can end the subscription in our database.
             const activeSubscription = await Subscription.findOne({
               where: { stripeSubscriptionId: stripeSubscription.id },
+              include: [Workspace],
             });
             if (!activeSubscription) {
               return apiError(req, res, {
@@ -366,6 +368,7 @@ async function handler(
               status: "ended",
               endDate: new Date(),
             });
+            await sendOpsEmail(activeSubscription.workspace.sId);
           } else {
             logger.warn(
               { event },