hp_pricebot/server.js

/*
Name:       Weslley De Souza
Date:       30.08.2017
Version:    1.0
Notes:      minimal Server

CHANGELOG:

 */
var version;
/* Libraries */
const express    = require("express")
    , app        = express()
    , http       = require("http")
    , exec       = require('child_process').exec
    , figlet     = require('figlet')
    , fs         = require('fs')
    , request    = require('request')
    , fetch      = require('node-fetch')
    , path       = require('path')
    , os         = require('os')
    , moment     = require('moment');
      app.locals.moment = require('moment');


//CLEAR TERMINAL
exec("sudo clear", puts);

//EXEC FUNCTIONS

function puts(error, stdout, stderr) {
    console.log(stdout)
}
function showCurrentExternalIP(log=true) {
    return new Promise((resovle)=>{
        const rnd   = Math.floor(Math.random() * 6);
        const ipurl = [
        'http://ifconfig.co/ip',
        'http://whatismyip.akamai.com/',
        'http://ip.tyk.nu/',
        'http://tnx.nl/ip',
        'http://eth0.me/',
        'https://4.ifcfg.me/ip'
        ]
      try{
        const options = {
            url: ipurl[rnd],
            timeout: 9000
        };
        request(options, function (err, resp, body) {
           if(log)console.log("Current IP: " +body);
            resovle(body)
        })
      }catch (SynatxError)
      {
          console.error("error : showCurrentExternalIP")
          resovle(false)
      }
    })
}
function startServer()  {
        //Output IP,Port, ServerStatus
        figlet('HotelPartner', function(err, data) {

            if (err) console.dir(err);

            console.log(data)
            console.log(os.hostname()+ "is running " + moment().format("DD.MM.YYYY HH:mm"));
            getVersion(true);


        });
}
function rebootServer() {
    exec("reboot",                    puts);
    exec("echo 123 | sudo -S reboot", puts);
}
function upadteServer(package) {

    if(!package)return;
    fs.writeFile('/var/node/package.json', JSON.stringify(package), 'utf8', function readFileCallback(err, data){
        if(err)console.log(err);
        else {
            fs.unlink('/var/node/node_modules/hp_pricebot');
        }

    })

}

function getVersion(log=false) {
    return new Promise(resolve=>{
        fs.readFile('/var/node/package.json','utf8', function read(err, data)
        {
            const jsnpackage = JSON.parse(data)
            let currentversion = jsnpackage.dependencies.hp_pricebot.replace(`^`,'').replace(' ','')

            exec('npm show hp_pricebot version', function(error, newversion, stderr) {
                console.log(currentversion + " "+ newversion.replace(' ',''))
              if(newversion != currentversion){

                  //Set new version
                  jsnpackage.dependencies.hp_pricebot = newversion.replace(' ','');
                  upadteServer(jsnpackage);


                  if (log){
                      console.log('Current Version: '+currentversion +" There is a newer version: "+newversion);
                  }
                  resolve(newversion);
              }
              else{
                  if (log){
                      console.info("Version: "+currentversion);
                  }

              }

            });

        })
    })
}

// -----------  ------------- END SERVER CONF----------------------------------


//###Export
module.exports = {
      "start"  :startServer,
      "reboot" :rebootServer,
      "fetch"  :fetch,
      "request":request,
      "os"     :os,
      "exec"   :exec,
      "http"   :http,
      "fs"     :fs,
      "time"   :moment,
      "showExternalIP":showCurrentExternalIP,
      "version":getVersion
   };