index.js

const fs = require('fs');
const http = require('http');
const path = require('path/posix');
const url = require('url');

const slugify = require('slugify');

const replaceTemplate = require('./modules/replaceTemplate');

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//SERVER

//reading file only once(sychronously)
const tempOverview = fs.readFileSync(`${__dirname}/templates/template-overview.html`, 'utf-8');
const tempCard = fs.readFileSync(`${__dirname}/templates/template-card.html`, 'utf-8');
const tempProduct = fs.readFileSync(`${__dirname}/templates/template-product.html`, 'utf-8');

//reading and parsing json data
const data = fs.readFileSync(`${__dirname}/dev-data/data.json`, 'utf-8');
const dataObj = JSON.parse(data);

//slugify
//console.log(slugify('FRESH AVOCADOS',{lower:true}))
const slugs = dataObj.map((el) => slugify(el.productName, { lower: true }));
console.log(slugs);

let server = http.createServer((req, res) => {
  //const pathName = req.url;

  const { query, pathname } = url.parse(req.url, true);
  //FOR OVERVIEW
  if (pathname === '/' || pathname === '/overview') {
    res.writeHead(200, {
      'Content-type': 'text/html',
    });
    //loop
    const cardshtml = dataObj.map((el) => replaceTemplate(tempCard, el)).join('');
    const output = tempOverview.replace('{%PRODUCT_CARDS%}', cardshtml);
    res.end(output);
    // console.log(output)
    //console.log(cardshtml)
    //res.end(tempOverview)
  }
  //FOR PRODUCT
  else if (pathname === '/product') {
    res.writeHead(200, {
      'Content-type': 'text/html',
    });
    const product = dataObj[query.id];
    const output = replaceTemplate(tempProduct, product);
    res.end(output);
  }
  //FOR API
  else if (pathname === '/api') {
    res.writeHead(200, {
      'Content-type': 'application/json',
    });
    res.end(data);
  }
  //PAGE NOT FOUND
  else {
    res.writeHead(404, {
      'Content-type': 'text/html',
      'my-own-header': 'hello world',
    });
    res.end('<h1>page not found</h1>');
  }
});

//server listening
server.listen(8000, '127.0.0.1', () => {
  console.log('server started');
});

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//FILES practice

//blocking or synchronous way
/*let text= fs.readFileSync('./txt/input.txt','utf-8')
console.log(text)

let textout = `this is what we know about the avocado ${text}.\n Created on ${Date.now()}`
fs.writeFileSync('./txt/output.txt',textout);
*/

//non-blocking or assynchronous way
/*fs.readFile('./txt/start.txt', 'utf-8', (err, data1) => {
    if(err) return console.log('ERROR!!!')
    fs.readFile(`./txt/${data1}.txt`, 'utf-8', (err, data2) => {
        console.log(data2)
        fs.readFile('./txt/append.txt', 'utf-8', (err, data3) => {
            console.log(data3)
            fs.writeFile('./txt/final.txt', `${data2}\n${data3}`, 'utf-8', (err) => {
                console.log('data written successfully')
            })
        })
    })
})
console.log('Reading File...')*/