feat: full studio build -- light theme, canvas thumbnails, i18n (fa/en)

src/app/api/webhooks/stripe/route.ts

@@ -0,0 +1,123 @@
+import { NextResponse } from "next/server";
+import type Stripe from "stripe";
+
+import { isPaidPlanId, type PlanId } from "@/lib/plans";
+import { getStripe } from "@/lib/stripe";
+import { createAdminClient } from "@/lib/supabase/admin";
+
+export const runtime = "nodejs";
+
+function resolvePlanId(metadata: Stripe.Metadata | null): PlanId | null {
+  const planId = metadata?.planId;
+  if (planId && isPaidPlanId(planId)) {
+    return planId;
+  }
+  return null;
+}
+
+async function upsertProfileFromSession(session: Stripe.Checkout.Session) {
+  const userId = session.client_reference_id ?? session.metadata?.userId;
+
+  if (!userId) {
+    return;
+  }
+
+  const plan = resolvePlanId(session.metadata);
+  if (!plan) {
+    return;
+  }
+
+  const admin = createAdminClient();
+
+  const { error } = await admin.from("profiles").upsert(
+    {
+      id: userId,
+      email: session.customer_email ?? session.customer_details?.email ?? null,
+      plan,
+      billing_period: session.metadata?.billingPeriod ?? null,
+      stripe_customer_id:
+        typeof session.customer === "string" ? session.customer : null,
+      stripe_subscription_id:
+        typeof session.subscription === "string"
+          ? session.subscription
+          : null,
+      updated_at: new Date().toISOString(),
+    },
+    { onConflict: "id" }
+  );
+
+  if (error) {
+    throw new Error(`Failed to update profile: ${error.message}`);
+  }
+}
+
+export async function POST(request: Request) {
+  const webhookSecret = process.env.STRIPE_WEBHOOK_SECRET;
+
+  if (!webhookSecret) {
+    return NextResponse.json(
+      { error: "Webhook secret not configured." },
+      { status: 500 }
+    );
+  }
+
+  const signature = request.headers.get("stripe-signature");
+
+  if (!signature) {
+    return NextResponse.json(
+      { error: "Missing stripe-signature header." },
+      { status: 400 }
+    );
+  }
+
+  const body = await request.text();
+  const stripe = getStripe();
+
+  let event: Stripe.Event;
+
+  try {
+    event = stripe.webhooks.constructEvent(body, signature, webhookSecret);
+  } catch (error) {
+    const message =
+      error instanceof Error ? error.message : "Webhook signature verification failed.";
+    return NextResponse.json({ error: message }, { status: 400 });
+  }
+
+  try {
+    switch (event.type) {
+      case "checkout.session.completed": {
+        const session = event.data.object as Stripe.Checkout.Session;
+        if (session.mode === "subscription") {
+          await upsertProfileFromSession(session);
+        }
+        break;
+      }
+      case "customer.subscription.deleted": {
+        const subscription = event.data.object as Stripe.Subscription;
+        const userId = subscription.metadata?.userId;
+
+        if (userId) {
+          const admin = createAdminClient();
+          await admin
+            .from("profiles")
+            .update({
+              plan: "free",
+              billing_period: null,
+              stripe_subscription_id: null,
+              updated_at: new Date().toISOString(),
+            })
+            .eq("id", userId);
+        }
+        break;
+      }
+      default:
+        break;
+    }
+  } catch (error) {
+    const message =
+      error instanceof Error ? error.message : "Webhook handler failed.";
+    return NextResponse.json({ error: message }, { status: 500 });
+  }
+
+  return NextResponse.json({ received: true });
+}