server.js

const express = require("express");
const dotenv = require("dotenv");
const morgan = require("morgan");
const colors = require("colors");
const helmet = require("helmet");
const cors = require("cors");
const hpp = require("hpp");
const rateLimit = require("express-rate-limit");
const xss = require("xss-clean");
const fileupload = require("express-fileupload");
const cookieParser = require("cookie-parser");
const connectDB = require("./config/db");
const mongoSanitize = require("express-mongo-sanitize");
const errorHandler = require("./middleware/error");
const path = require("path");

//Load env variables
dotenv.config({ path: "./config/config.env" });

//connect database
connectDB();

//Route Files
const bootcamps = require("./routes/bootcamps");
const courses = require("./routes/courses");
const auth = require("./routes/auth");
const users = require("./routes/users");
const reviews = require("./routes/reviews");

const app = express();

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

// Cookie Parser
app.use(cookieParser());

//Dev Logging middleware
if (process.env.NODE_ENV === "development") {
  app.use(morgan("dev"));
}

//File Uploading
app.use(fileupload());

//Sanitize Data
app.use(mongoSanitize());

//Set security headers
app.use(helmet());

//Prevent XSS attacks
app.use(xss());

//Rate Limit
const limiter = rateLimit({
  windowMs: 10 * 60 * 1000, //10 minutes
  max: 100,
});
app.use(limiter);

//Prevent http param pollution
app.use(hpp());

//Enable CORS
app.use(cors());

app.use(express.static(path.join(__dirname, "public")));

//Mount Routers
app.use("/api/v1/bootcamps", bootcamps);
app.use("/api/v1/courses", courses);
app.use("/api/v1/auth", auth);
app.use("/api/v1/users", users);
app.use("/api/v1/reviews", reviews);
app.use(errorHandler);

const PORT = process.env.PORT || 3000;

const server = app.listen(PORT, () => {
  console.log(
    `Server running in ${process.env.NODE_ENV} mode on port ${PORT} 🚀🚀🚀`
      .yellow.bold
  );
});

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