app.js

const express = require("express");
const bodyParser = require("body-parser");
const HttpError = require("./errors/http-error");
const NotFoundError = require("./errors/not-found");

const app = express();
const courselistRouter = require("./controllers/courselist-controller");
const articleRouter = require("./controllers/article-controller");
const errorRouter = require("./controllers/error-controller");

app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

// app.get('/', (req, res, next) => {
//   res.status(200)
// })

app.use("/course-lists", courselistRouter);
app.use("/course-lists/articles", articleRouter);
app.use("/errors", errorRouter);

app.use((req, res, next) => {
  return next(new NotFoundError());
});

app.use((err, req, res, next) => {
  if (!(err instanceof HttpError)) {
    err = new HttpError(err.message);
  }

  res.status(err.statusCode);
  res.json({
    error: err
  });
});

if (!module.parent) {
  app.listen(3000, () => {
    console.log("Server launched on port 3000");
  });
}

module.exports = app;