request.js

const request = require('request');
const fs = require('fs');
const log = require('electron-log');
const electron = require('electron');

const {spawn} = require('child_process');
const {Utils} = require('../Utils');


const nameMap = {
  "darwin": "mac",
  "win32": "win",
  "linux": "linux",
};
const suffix = nameMap[process.platform];

let checkRepo = new Promise((resolve, reject) => {
  request(
    {
      url: 'https://api.github.com/repos/spajak/cef-pdf/releases',
      headers: {'User-Agent': 'Awesome-Octocat-App'}
    },
    (error, requestx, body) => {
      const data = JSON.parse(body);
      resolve(data[0].assets);
    });
});

module.exports = checkRepo
  .then((assets) => {
    if (!fs.existsSync("./cef-pdf")) {
      fs.mkdirSync("./cef-pdf");
    }

    for (let i in assets) {
      let asset = assets[i];

      if(asset.browser_download_url.includes(suffix)){
        log.info(process.platform);
        return asset;
      }
    }
  })
  .then((asset)=> {
    request({url: asset.browser_download_url})
    .pipe(fs.createWriteStream('./cef-pdf/' + asset.name))
    .on('finish', ()=> {
        let pathTo7za = `${Utils.getPathToPublic()}/7z/${suffix}/7za`;
        if(suffix == 'win')
          pathTo7za += '.exe';
        const pathToFile = './cef-pdf/' + asset.name;
        const unzip = spawn(pathTo7za,
          ['x', `-o${electron.app.getPath('userData')}/cef-pdf/${suffix}`, pathToFile, '-y']);
        unzip.on('exit', ()=>{
          log.info('done');
        });
    });
  });