server.js

const HTTP = require('http');
const { sendJSON, sendHTML } = require('./utils');
const fileSystem = require('fs');


const server = HTTP.createServer((request, response) => {
  let path = request.url;
  console.log("request received", path);
  if (path === '/'){
    response.end("home");
  }
  else if (path === '/opensesame'){
    response.end("ooh you found the easter egg!");
  }
  else if (path === '/example.gif'){
    let filePath = "./assets/wombat.gif";
    let stat = fileSystem.statSync(filePath);
    response.writeHead(200, {
      'Content-Type': 'image/gif',
      'Content-length': stat.size
    });
    fileSystem.createReadStream(filePath).pipe(response);
  }
  else if (path === '/postcode.json'){
    sendJSON(response, 200, [
      {"name": "Melbourne", "postcode": 3000},
      {"name": "Tottenham", "postcode": 3012},
      {"name": "Albion", "postcode": 3020},
      {"name": "Sunshine", "postcode": 3011},
    ]);
  }
  else if (path.startsWith('/postcode/')){
    //get the part of the url that should be a postcode and attempt to convert it to an integer
    postcodeNumber = parseInt(path.slice(10));
    //check if there is a file with that number that exists in our /postcode/ folder:
    pathToPostcodeFile = `./postcode/${postcodeNumber}.json`;
    fileSystem.exists(pathToPostcodeFile, function(exists){
      if (exists){
        response.writeHead(200, {
          "Content-Type": "application/json"
        })
        fileSystem.createReadStream(pathToPostcodeFile).pipe(response)
      }
      else{ //when no postcode file exists..
        sendHTML(response, 404, `
        <h1>Sorry I don't have anything on postcode ${postcodeNumber}</h1>
        `, 'main.css');
      }
    })

    console.log(postcodeNumber);

    // sendJSON(response, 200, `./postcode/${postcodeNumber}.json`);

  }
  else if (path.startsWith('/assets/colors/')){
    color = path.slice(15);
    color = color.split('.')[0];
    response.end(`
    h1{
      color: ${color};
    }`);
  }
  else if (path.startsWith('/about')){ // instead of /about.html because its more modern to leave off the .html
    let color = path.slice(6);
    sendHTML(response, 200, `
      <h1>about</h1>
      <p>
      This is a paragraph
      </p>
      `, `${color}.css`);
  }
  else {
    sendJSON(response, 404, {"message": "page not found"});    
  }
});

//start the server:

server.listen(8001, (error) => {
  console.log('Server has started at http://localhost:8001');
});