server.js

const express = require("express");
const mongoose = require("mongoose");
require("dotenv").config();
const services = require("./services");
const cors = require("cors");
const bodyParser = require("body-parser");
const PORT = process.env.PORT
const { createMiddleware } = require("./middlewares");
const middleware = createMiddleware();
const jsonwebtoken = require("jsonwebtoken");
const commonCtrl = require("./src/controllers/common.controller")




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

app.use(bodyParser.json());

mongoose
  .connect(process.env.mongoDB, {
    useUnifiedTopology: true,
    useCreateIndex: true,
    useNewUrlParser: true,
    useFindAndModify: false,
  })
  .then(() => {
    console.log("Successfully connected to the database");
  })
  .catch((err) => {
    console.log("ENV => " + process.env.mongoDB);
    console.log("Could not connect to the database. Exiting now...", err);
    process.exit();
  });


  //JWT decoder
  app.use(function (req, res, next) {
    if (
      req.headers &&
      req.headers.authorization &&
      req.headers.authorization.split(" ")[0] === "Bearer"
    ) {
      jsonwebtoken.verify(
        req.headers.authorization.split(" ")[1],
        process.env.apiKey,
        function (err, decode) {
          if (err) req.user = undefined;
          req.user = decode;
          next();
        }
      );
    } else {
      req.user = undefined;
      next();
    }
  });

  //check logged in
  app.use(async function (req, res, next) {
    if (req.headers && req.headers.logintoken) {
      const result = await commonCtrl.checkUserLoggedin(req);
      if (result.isLoggedIn) {
        req.isLoggedIn = true;
		req.userDoc = result.userDoc
      }
      next();
    } else {
	  req.isLoggedIn = false;
	  req.userDoc = {}
      next();
    }
  });

  // define a simple route
app.get("/", (req, res) => {
	res.json({
	  message: "CAFS APIs"
	});
  });
  services({ app, middleware });

  // Error handler
  const errorHandler = (err, req, res, next) => {
    const {
      user,
    } = req;

    if (typeof err === "string") err = new Error(err);

    if (!err) err = new Error("An error occured");

    if (!err.statusCode) err.statusCode = 500;


    return res
      .status(err.statusCode)
      .send({ message : "An Unkown Error Occured", error: err.message});
  };

  // Should be the last handler
  app.use(errorHandler);


  // listen for requests
app.listen(PORT, () => {
	console.log("Server is listening on port", PORT);
  });