How to Send Email from a v0-Generated App

import { AhaSendClient } from "@ahasend/sdk";

function requireEnv(name: string): string {
  const value = process.env[name];
  if (!value) throw new Error(`Missing required environment variable: ${name}`);
  return value;
}

export const ahasend = new AhaSendClient({
  apiKey: requireEnv("AHASEND_API_KEY"),
  accountId: requireEnv("AHASEND_ACCOUNT_ID"),
});

const deliveryMode = requireEnv("AHASEND_DELIVERY_MODE");
if (deliveryMode !== "sandbox" && deliveryMode !== "live") {
  throw new Error("AHASEND_DELIVERY_MODE must be sandbox or live");
}

export const sandboxMode = deliveryMode === "sandbox";

import { NextResponse } from "next/server";
import { AhaSendAPIError } from "@ahasend/sdk";
import { ahasend, sandboxMode } from "@/lib/ahasend";
import { requireUser } from "@/lib/auth";
import { getPendingEmailConfirmation } from "@/lib/email-confirmations";

export async function POST(request: Request) {
  try {
    const user = await requireUser(request);
    if (!user) {
      return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
    }

    const confirmation = await getPendingEmailConfirmation(user.id);
    if (!confirmation) {
      return NextResponse.json({ error: "No pending confirmation" }, { status: 404 });
    }

    const result = await ahasend.messages.send(
      {
        from: { email: "hello@yourdomain.com", name: "Your App" },
        recipients: [{ email: confirmation.email }],
        subject: "Confirm your email",
        text_content: `Thanks for signing up. Confirm your email: ${confirmation.url}`,
        sandbox: sandboxMode,
      },
      {
        idempotencyKey: `${sandboxMode ? "sandbox" : "live"}-email-confirmation-${confirmation.id}`,
      },
    );

    const rejected = result.data.filter((message) => message.status === "error").length;
    const accepted = result.data.length - rejected;

    if (accepted === 0 || rejected > 0) {
      return NextResponse.json({ accepted, rejected }, { status: 502 });
    }

    return NextResponse.json({ accepted, rejected }, { status: 202 });
  } catch (error) {
    if (error instanceof AhaSendAPIError) {
      console.error("AhaSend request failed", {
        status: error.status,
        code: error.code,
        requestId: error.requestId,
      });
      return NextResponse.json({ error: "Failed to send email" }, { status: 502 });
    }
    throw error;
  }
}

async function sendConfirmation() {
  const response = await fetch("/api/send-confirmation", { method: "POST" });

  if (!response.ok) {
    throw new Error("The confirmation email could not be queued");
  }

  return response.json();
}