server.js

// imports
let cfg = require("./config.json"); // config file
let express = require("express"); // express module
let cors = require("cors"); // cross origin requests (localhost -> localhost:3000)
const db = require("./database/db"); // database connector

const app = express();
app.use(cors()); // allow all origins -> Access-Control-Allow-Origin: *

// bodyparser for sending different http request bodies
let bodyParser = require("body-parser");
app.use(bodyParser.urlencoded({ extended: true })); // support encoded bodies
app.use(bodyParser.json()); // support json encoded bodies

// routes
const loginRoute = require("./routes/login");
const tokenRoute = require("./routes/token");
const registerRoute = require("./routes/register");
const spendingsRoute = require("./routes/spendings");
const filterRoute = require("./routes/filter");
const updateRoute = require("./routes/update");
const addDeleteRoute = require("./routes/alter");
const userData = require("./routes/user");
const changePW = require("./routes/password");

app.use("/login", loginRoute);
app.use("/token", tokenRoute);
app.use("/register", registerRoute);
app.use("/spendings", spendingsRoute);
app.use("/filter", filterRoute);
app.use("/alter", addDeleteRoute);
app.use("/update", updateRoute);
app.use("/user", userData);
app.use("/pw", changePW);

app.use("/", (req, res) => {
  res.send("Hello, its MySpendings server!");
});

const PORT = process.env.PORT || cfg.server.port;
db.initDb.then(
  () => {
    app.listen(PORT, () => {
      console.log("Listening on port " + PORT + "...");
    });
  },
  () => {
    console.log("Failed to connect to DB!");
  }
);