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index.js
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index.js
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const puppeteer = require('puppeteer');
const CronJob = require('cron').CronJob;
const nodemailer = require('nodemailer');
const smtpTransport = require('nodemailer-smtp-transport');
require('dotenv').config();
const {Pool} = require('pg');
const connectURI = "postgres://xnyhqsdgfkgbbi:82b53469e34e73b89dd7a77bd035cd54c41ee10f9e958e86145f51f500c94b2e@ec2-54-247-79-178.eu-west-1.compute.amazonaws.com:5432/d3rf1g2ceonf2s";
const pool = new Pool({
connectionString: connectURI,
ssl: { rejectUnauthorized: false }
});
pool.connect((err, client, done) => {
if(err){
console.log("Postgres error which is: "+err);
}
else{
console.log("Postgres Connection successfull...");
done();
}
});
//table created on 10 June, 2020
// pool.query('CREATE TABLE aiubnotice (noticetitle VARCHAR (2000) NOT NULL);',(err,res) => {
// if(err){
// console.log("Table creation error which is: "+err);
// }
// else{
// console.log('Table creation successful.');
// }
// });
const aiubNoticeURL = 'https://www.aiub.edu/category/notices';
var noticeTitle, noticeDesc, postURL, day, month, year;
var lastNoticeTitle;
var dateObj, cday, cmonth, cyear; //for current date
var timeObj, chour, cminute, ampm; //for watch time
const monthArray = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
var countCronjobHour = -1;
$PORT = process.env.PORT || 5000;
//pupp
async function configureBrowser(){
try{
const browser = await puppeteer.launch({
headless: true,
'args' : [
'--no-sandbox',
'--disable-setuid-sandbox'
]
});
const page = await browser.newPage();
await page.goto(aiubNoticeURL);
page.waitForSelector("#frame > div > div.row > div.col-xs-12.col-sm-12.col-md-9.pull-right > ul > li:nth-child(1)").then(async function(){
noticeTitle = await page.$eval("#frame > div > div.row > div.col-xs-12.col-sm-12.col-md-9.pull-right > ul > li:nth-child(1) > div.info > h2", element => element.innerHTML);
noticeDesc = await page.$eval("#frame > div > div.row > div.col-xs-12.col-sm-12.col-md-9.pull-right > ul > li:nth-child(1) > div.info > p", element => element.innerHTML);
day = await page.$eval("#frame > div > div.row > div.col-xs-12.col-sm-12.col-md-9.pull-right > ul > li:nth-child(1) > time > span.day", element => element.innerHTML);
month = await page.$eval("#frame > div > div.row > div.col-xs-12.col-sm-12.col-md-9.pull-right > ul > li:nth-child(1) > time > span.month", element => element.innerHTML);
year = await page.$eval("#frame > div > div.row > div.col-xs-12.col-sm-12.col-md-9.pull-right > ul > li:nth-child(1) > time > span.year", element => element.innerHTML);
postURL = await page.$$eval('#frame > div > div.row > div.col-xs-12.col-sm-12.col-md-9.pull-right > ul > li:nth-child(1) > a', e=>e.map((a)=>a.href))
//Current Date Calculate
dateObj = new Date();
cday = dateObj.getUTCDate();
cmonth = dateObj.getUTCMonth();
cyear = dateObj.getUTCFullYear();
function watchTime(){
timeObj = new Date();
chour = timeObj.getHours() + 6; //+6 added for Heroku server to respond in UTC Asia/Dhaka
cminute = timeObj.getUTCMinutes();
ampm = "AM";
if (cminute < 10){
cminute = "0" + cminute;
}
if(chour > 12){
chour -= 12;
ampm = "PM";
}
console.log(`Current Time: ${chour}:${cminute} ${ampm}`);
}
//nodemailer
//before pushing, set pass as password
var transporter = nodemailer.createTransport(smtpTransport({
service: 'gmail',
host: 'smtp.gmail.com',
port: 465,
secure: true,
auth: {
user: process.env.USERNAME,
pass: process.env.PASSWORD
}
}));
var mailOptions = {
from: `AIUB Notice Bell <${process.env.USERNAME}>`,
to: process.env.SEND_MAIL,
subject: 'New Notice',
text: `${noticeTitle}`,
html: `<b>${noticeTitle}</b><br><br>Notice Date: ${day} ${month},${year}<br><br>See full notice: ${postURL}<br><br><img src="cid:ahmedalif.com"/>`,
attachments: [
{
filename: 'logo.png',
path: './assets/logo.png',
cid: 'ahmedalif.com'
}
],
};
sendMailFinal = function(){
transporter.sendMail(mailOptions,function(err,data){
if(err){
console.log("Send Faild. reason: "+err);
}
else{
console.log("Mail send successfully");
}
});
}
//clear database's data
function noticeClear(){
pool.query("UPDATE aiubnotice SET noticetitle=null;",(err,res) => {
if(err){
console.log("Table clear error which is: "+err);
}
else{
console.log("Table cleared successfully");
}
});
}
//insertion data to database
function noticeInsertion(){
noticeClear();
pool.query("INSERT INTO aiubnotice (noticetitle) VALUES ('"+noticeTitle+"');",(err,res) => {
if(err){
console.log("Table insertion error which is: "+err);
}
else{
console.log('Table insertion successful.');
console.log('Your inserted notice title is: '+noticeTitle);
}
});
}
function centralProcessing(lastNoticeTitle){
var lnt = lastNoticeTitle;
if(lnt != noticeTitle){
console.log(`${day} ${month},${year}`);
console.log(noticeTitle);
console.log(noticeDesc);
console.log("See full post: "+postURL);
watchTime();
noticeInsertion();
//Sending Mail Here
sendMailFinal();
}
else{
console.log('No further Notice Today');
watchTime();
}
}
//see data from database save
pool.query("SELECT noticetitle FROM aiubnotice",(err,res) => {
if(err){
console.log("Table selecting error which is: "+err);
}
else{
console.log('Table selecting successfully.');
//To see the rows in database
//console.log(res.rows);
lastNoticeTitle = res.rows[0].noticetitle;
console.log('got notice data from database : '+lastNoticeTitle);
centralProcessing(lastNoticeTitle);
}
});
//Have to initialize first when we start the app for the first time
// pool.query("INSERT INTO aiubnotice (noticetitle) VALUES ('"+noticeTitle+"');",(err,res) => {
// if(err){
// console.log("Table insertion error which is: "+err);
// }
// else{
// console.log('Table insertion successful.');
// console.log('Your inserted notice title is: '+noticeTitle);
// }
// });
browser.close();
});
}
catch(e){
console.log("Error Catched in configureBrowser(): "+e);
}
}
// main application starts from here
// cronjob will execute every 1 minute with this: * * * * *
// cronjob will execute every 1 hour with this: 0 * * * *
async function tracking(){
try{
let track = new CronJob('0 * * * *', function(){
console.log('===================<App Started>===================');
configureBrowser();
countCronjobHour++;
console.log('Total Hour Monitored: '+countCronjobHour);
}, null, true, null, null, true);
track.start();
}
catch(e){
console.log("Error Catched in tracking(): "+e);
}
}
//start tracking
tracking();