server.js

const express = require("express");
const dotenv = require("dotenv");
const connectDB = require("./config/db");
const admin = require("firebase-admin");
const path = require("path");

const cors = require("cors");
//env vars
dotenv.config({ path: "config/config.env" });

//Connect to database
connectDB();

// Init Firebase Admin SDK
if (!admin.apps.length) {
  const serviceAccountPath = path.join(
    __dirname,
    "config/firebaseServiceAccountKey.json"
  );

  admin.initializeApp({
    credential: admin.credential.cert(require(serviceAccountPath)),
  });
}

//Route files
const campgrounds = require("./routes/campgrounds");
const auth = require("./routes/auth");
const bookings = require("./routes/bookings");

const app = express();
app.use(cors());

//Body parser
app.use(express.json());

app.use("/api/v1/campgrounds", campgrounds);
app.use("/api/v1/auth", auth);
app.use("/api/v1/bookings", bookings);

const PORT = process.env.PORT || 5000;

const server = app.listen(
  PORT,
  console.log(
    "Server running in ",
    process.env.NODE_ENV,
    " mode on port ",
    PORT
  )
);

//Handle unhandled promise rejections
process.on("unhandledRejection", (err, promise) => {
  console.log(`Error: ${err.message}`);
  //Close server & exit process
  server.close(() => process.exit(1));
});