izyim-mockapi/node_modules/json-server/lib/server/router/singular.js

'use strict';

const express = require('express');
const write = require('./write');
const getFullURL = require('./get-full-url');
const delay = require('./delay');

module.exports = (db, name) => {
  const router = express.Router();
  router.use(delay);

  function show(req, res, next) {
    res.locals.data = db.get(name).value();
    next();
  }

  function create(req, res, next) {
    db.set(name, req.body).value();
    res.locals.data = db.get(name).value();

    res.setHeader('Access-Control-Expose-Headers', 'Location');
    res.location(`${getFullURL(req)}`);

    res.status(201);
    next();
  }

  function update(req, res, next) {
    if (req.method === 'PUT') {
      db.set(name, req.body).value();
    } else {
      db.get(name).assign(req.body).value();
    }

    res.locals.data = db.get(name).value();
    next();
  }

  const w = write(db);

  router.route('/').get(show).post(create, w).put(update, w).patch(update, w);

  return router;
};