116 lines
3.1 KiB
TypeScript
116 lines
3.1 KiB
TypeScript
import { NextRequest, NextResponse } from "next/server";
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import clientPromise from "@/lib/db";
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import { Collection } from "mongodb";
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import dns from "dns/promises";
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import { isEmail } from "validator";
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export async function POST(req: NextRequest) {
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const generateUnsubscribeID = () => {
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const chars =
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"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
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let result = "";
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for (let i = 0; i < 32; i++) {
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result += chars.charAt(Math.floor(Math.random() * chars.length));
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}
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return result;
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};
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const generateUniqueUnsubscribeID = async (collection: Collection) => {
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const id = generateUnsubscribeID();
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const result = await collection
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.find({
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unsubscribeId: id
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})
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.toArray();
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if (result.length > 0) {
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return await generateUniqueUnsubscribeID(collection);
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}
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return id;
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};
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try {
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const { email, captchaToken } = await req.json();
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if (!email || !captchaToken) {
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return NextResponse.json(
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{ message: "Email and captcha token are required." },
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{ status: 400 }
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);
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}
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// Verify hCaptcha token
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const hcaptchaResponse = await fetch(
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`https://api.hcaptcha.com/siteverify`,
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{
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method: "POST",
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headers: {
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"Content-Type": "application/x-www-form-urlencoded"
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},
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body: `secret=${process.env.HCAPTCHA_SECRET}&response=${captchaToken}`
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}
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);
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const hcaptchaData = await hcaptchaResponse.json();
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if (!hcaptchaData.success) {
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return NextResponse.json(
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{ message: "Captcha verification failed." },
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{ status: 400 }
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);
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}
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// Check email address
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if (!isEmail(email)) {
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return NextResponse.json(
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{ message: "Invalid email address" },
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{ status: 400 }
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);
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}
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// Check email host
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const emailDomainMatch = email.match(/@([^@]+)/);
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const emailDomain = emailDomainMatch ? emailDomainMatch[1] : "";
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let isEmailHostValid = false;
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try {
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const mxRecords = await dns.resolveMx(emailDomain);
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if (mxRecords.length > 0) isEmailHostValid = true;
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} catch (err) {}
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if (!isEmailHostValid) {
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return NextResponse.json(
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{ message: "Email domain is misconfigured" },
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{ status: 400 }
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);
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}
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const client = await clientPromise;
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const db = client.db(process.env.MONGODB_DB);
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const collection = db.collection("subscribers");
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// checking if email alr exists
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const existingSubscriber = await collection.findOne({ email });
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if (existingSubscriber) {
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return NextResponse.json(
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{ message: "This email is already subscribed." },
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{ status: 409 }
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);
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}
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// saves the email in the db
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await collection.insertOne({
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email,
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subscribedAt: new Date(),
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unsubscribeId: await generateUniqueUnsubscribeID(collection)
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});
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return NextResponse.json(
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{ message: "Successfully subscribed!" },
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{ status: 201 }
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);
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} catch (error) {
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console.error("Error subscribing:", error);
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return NextResponse.json(
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{ message: "Internal Server Error" },
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{ status: 500 }
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);
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}
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}
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