db.js

const admin = require("firebase-admin");
const { initializeApp, cert } = require("firebase-admin/app");
const { getFirestore } = require("firebase-admin/firestore");
const serviceAccount = JSON.parse(process.env.firebaseCredential);

exports.handler = async function (event, context) {
  let app;
  if (admin.apps.length === 0) {
    app = initializeApp({
      credential: cert(serviceAccount),
    });
  }

  const db = getFirestore(app);

  try {
    const body = JSON.parse(event.body);
    const customerEmail = body.email;
    const orders = body.orders;

    const response = await db.collection("orders").add({
      customerEmail,
      orders,
    });

    return {
      statusCode: 200,
      body: JSON.stringify({
        message: "Document added successfully - " + response.id,
      }),
    };
  } catch (error) {
    console.log("Error adding document ", error);
  }
};