text: const express = require('express');
  const app = express();
  const bodyParser = require('body-parser');
  const mongoose = require('mongoose');
  
  app.use(express.static(__dirname+'/client'));
  app.use(bodyParser.json());
  
  Genre =require('./models/genre');
  Book =require('./models/book');
  
  // Connect to Mongoose
  mongoose.connect('mongodb://localhost/bookstore');
  var db = mongoose.connection;
  
  app.get('/', (req, res) => {
  	res.send('Please use /api/books or /api/genres');
  });
  
  app.get('/api/genres', (req, res) => {
  	Genre.getGenres((err, genres) => {
  		if(err){
  			throw err;
  		}
  		res.json(genres);
  	});
  });
  
  app.post('/api/genres', (req, res) => {
  	var genre = req.body;
  	Genre.addGenre(genre, (err, genre) => {
  		if(err){
  			throw err;
  		}
  		res.json(genre);
  	});
  });
  
  app.put('/api/genres/:_id', (req, res) => {
  	var id = req.params._id;
  	var genre = req.body;
  	Genre.updateGenre(id, genre, {}, (err, genre) => {
  		if(err){
  			throw err;
  		}
  		res.json(genre);
  	});
  });
  
  app.delete('/api/genres/:_id', (req, res) => {
  	var id = req.params._id;
  	Genre.removeGenre(id, (err, genre) => {
  		if(err){
  			throw err;
  		}
  		res.json(genre);
  	});
  });
  
  app.get('/api/books', (req, res) => {
  	Book.getBooks((err, books) => {
  		if(err){
  			throw err;
  		}
  		res.json(books);
  	});
  });
  
  app.get('/api/books/:_id', (req, res) => {
  	Book.getBookById(req.params._id, (err, book) => {
  		if(err){
  			throw err;
  		}
  		res.json(book);
  	});
  });
  
  app.post('/api/books', (req, res) => {
  	var book = req.body;
  	Book.addBook(book, (err, book) => {
  		if(err){
  			throw err;
  		}
  		res.json(book);
  	});
  });
  
  app.put('/api/books/:_id', (req, res) => {
  	var id = req.params._id;
  	var book = req.body;
  	Book.updateBook(id, book, {}, (err, book) => {
  		if(err){
  			throw err;
  		}
  		res.json(book);
  	});
  });
  
  app.delete('/api/books/:_id', (req, res) => {
  	var id = req.params._id;
  	Book.removeBook(id, (err, book) => {
  		if(err){
  			throw err;
  		}
  		res.json(book);
  	});
  });
  
  app.listen(3000);
  console.log('Running on port 3000...');
  