feat: use zod for validation

apps/web/src/app/api/waitlist/route.ts

@@ -4,6 +4,11 @@ import { waitlist } from "@/lib/db/schema";
 import { eq } from "drizzle-orm";
 import { nanoid } from "nanoid";
 import { waitlistRateLimit } from "@/lib/rate-limit";
+import { z } from "zod";
+
+const waitlistSchema = z.object({
+  email: z.string().email("Invalid email format").min(1, "Email is required"),
+});
 
 export async function POST(request: NextRequest) {
   // Rate limit check
@@ -18,20 +23,8 @@ export async function POST(request: NextRequest) {
   }
 
   try {
-    const { email } = await request.json();
-
-    if (!email || typeof email !== "string") {
-      return NextResponse.json({ error: "Email is required" }, { status: 400 });
-    }
-
-    // Validate email format
-    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
-    if (!emailRegex.test(email)) {
-      return NextResponse.json(
-        { error: "Invalid email format" },
-        { status: 400 }
-      );
-    }
+    const body = await request.json();
+    const { email } = waitlistSchema.parse(body);
 
     // Check if email already exists
     const existingEmail = await db
@@ -58,6 +51,11 @@ export async function POST(request: NextRequest) {
       { status: 201 }
     );
   } catch (error) {
+    if (error instanceof z.ZodError) {
+      const firstError = error.errors[0];
+      return NextResponse.json({ error: firstError.message }, { status: 400 });
+    }
+
     console.error("Waitlist signup error:", error);
     return NextResponse.json(
       { error: "Internal server error" },