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import { NextRequest, NextResponse } from "next/server";
import { db, eq, waitlist } from "@opencut/db";
import { checkBotId } from "botid/server";
import { nanoid } from "nanoid";
import { waitlistRateLimit } from "@/lib/rate-limit";
import { z } from "zod";
import { env } from "@/env";
import { cookies } from "next/headers";
import crypto from "crypto";
const waitlistSchema = z.object({
email: z.string().email("Invalid email format").min(1, "Email is required"),
});
const CSRF_TOKEN_NAME = "waitlist-csrf";
const TOKEN_EXPIRY = 60 * 60 * 1000;
async function validateCSRFToken(request: NextRequest): Promise<boolean> {
const clientToken = request.headers.get("x-csrf-token");
if (!clientToken) return false;
const cookieStore = await cookies();
const cookieValue = cookieStore.get(CSRF_TOKEN_NAME)?.value;
if (!cookieValue) return false;
const [token, timestamp, signature] = cookieValue.split(":");
if (!token || !timestamp || !signature) return false;
if (clientToken !== token) return false;
const now = Date.now();
const tokenTime = parseInt(timestamp);
if (now - tokenTime > TOKEN_EXPIRY) return false;
const expectedSignature = crypto
.createHmac("sha256", env.BETTER_AUTH_SECRET)
.update(`${token}:${timestamp}`)
.digest("hex");
return signature === expectedSignature;
}
export async function POST(request: NextRequest) {
const verification = await checkBotId();
if (verification.isBot) {
return NextResponse.json({ error: "Access denied" }, { status: 403 });
}
const identifier = request.headers.get("x-forwarded-for") ?? "127.0.0.1";
const { success } = await waitlistRateLimit.limit(identifier);
if (!success) {
return NextResponse.json(
{ error: "Too many requests. Please try again later." },
{ status: 429 },
);
}
const isValidToken = await validateCSRFToken(request);
if (!isValidToken) {
return NextResponse.json(
{ error: "Invalid security token" },
{ status: 403 },
);
}
try {
const body = await request.json();
const { email } = waitlistSchema.parse(body);
const existingEmail = await db
.select()
.from(waitlist)
.where(eq(waitlist.email, email.toLowerCase()))
.limit(1);
if (existingEmail.length > 0) {
return NextResponse.json(
{ error: "Email already registered" },
{ status: 409 },
);
}
await db.insert(waitlist).values({
id: nanoid(),
email: email.toLowerCase(),
});
return NextResponse.json(
{ message: "Successfully joined waitlist!" },
{ 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" },
{ status: 500 },
);
}
}
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