index.js

const express = require('express');
const morgan = require('morgan');
const path = require('path');

// makes an instance of an express app
const app = express();

// what is a port
const PORT = 5000;

// app.use means for every single route, use the morgan function
// middleware
app.use(morgan('tiny'))

// in memory database
const books = [
  {
    id: 1,
    name: 'harry potter 1',
    author: 'jk rowling',
    movie: true
  },
  {
    id: 2,
    name: 'brave new world',
    author: 'aldous huxley',
    movie: false 
  }
]

// 1.
app.get('/books', (req, res) => {
  res.send(books)
})

// 2. and 3. 
app.get('/books/:id', (req, res) => {
  const id = req.params.id
  // .find, Rails .find method
  const foundBook = books.find((book) => {
    return book.id === Number(id)
  })
  if (!foundBook) {
    res.status(404).send({message: 'error'})
  } else {
    res.send(foundBook)
  }
})

app.get('/send-html', (req, res) => {
  const options = {
    root: path.join(__dirname, 'public'),
  }
  res.sendFile('index.html', options)
})

// TODO
// 1. How might we make an endpoint to access all of these books?
// 2. How might we make an endpoint to access one of these books?
// 3. How might we send a 404 message if the book doesn't exist? Look up res.status for this.
// 4. How do you send an HTML file back to the client?

// listening on port 5000
app.listen(PORT, () => console.log(`listening on port ${PORT}`))