Email notifications with weekly Epic Store Free Games

_epic_free_games_email_notifications.md

Epic Store Free Games email notifications

OS Setup: Linux (any), Postfix as a forwarder

Depends on: nodejs + AuroPick/epic-free-games

It's best to run cron once every 2-3 days, so as not to miss the release time window. The script compares with the last run to avoid sending duplicate emails.

v2: JS only

mkdir -p /root/bin/epic
cd /root/bin/epic
wget https://gist.githubusercontent.com/c0m4r/76c8497c34a093dfc63fbf02537c327d/raw/epic.cjs
wget https://gist.githubusercontent.com/c0m4r/76c8497c34a093dfc63fbf02537c327d/raw/package.json
npm update # or npm install epic-free-games nodemailer fs eslint

Cron

0 0 */3 * * /usr/bin/node /root/bin/epic/epic.cjs > /root/bin/epic/epic.log 2>&1

Linter

wget https://gist.githubusercontent.com/c0m4r/76c8497c34a093dfc63fbf02537c327d/raw/bb9cf89ebfcf49d3997ce5c6702b0a6b0d13c212/eslint.config.js
npx eslint epic.cjs

v1: Bash + JS

npm install epic-free-games nodemailer
mkdir -p /root/bin/epic
cd /root/bin/epic
wget https://gist.githubusercontent.com/c0m4r/76c8497c34a093dfc63fbf02537c327d/raw/epic.js
wget https://gist.githubusercontent.com/c0m4r/76c8497c34a093dfc63fbf02537c327d/raw/epic.sh
chmod o+x epic.sh

Cron

0 0 */3 * * /root/bin/epic/epic.sh > /root/bin/epic/epic.log 2>&1

epic.cjs

// Epic Free Games Newsletter
// https://www.npmjs.com/package/epic-free-games
// $ npm install epic-free-games nodemailer fs

const mail_from = "[email protected]";

const mails = [
  "[email protected]",
  "[email protected]"
];

const fs = require('fs')
const nodemailer = require('nodemailer');

const { EpicFreeGames } = require('epic-free-games');
const epicFreeGames = new EpicFreeGames({ country: 'PL', locale: 'pl', includeAll: true })

let last = "";

fs.readFile(__dirname + '/epic.last', (err, inputD) => {
   if (err) {
     last = "";
   } else {
     last = inputD.toString();
   }
});

function write_last(content) {
  fs.writeFile(__dirname + '/epic.last', content, err => {
    if (err) console.log(err);
  });
}

// mailer setup

const transporter = nodemailer.createTransport({
  host: "localhost",
  port: 25,
  tls: { rejectUnauthorized: false, },
});

function send_epic_mail(mail_to, mail_msg) {
  const mailOptions = {
    from: mail_from,
    to: mail_to,
    subject: 'Epic free games',
    html: `<h3>Epic free games</h3><table border="1">${mail_msg}</table>`
  };

  transporter.sendMail(mailOptions, function(error, info){
    if (error) {
      console.log(error);
    } else {
      console.log(`Email to ${mail_to} sent: ${info.response}`);
    }
  });
}

// looking for free games...
epicFreeGames.getGames().then(res => {
  let message = "";
  res.currentGames.forEach(function(item) {
    console.log(item.title);
    message = `${message}<tr>
	<td><a href="https://store.epicgames.com/pl/browse?q=${encodeURIComponent(item.title)}">${item.title}</a></td>
	<td>${item.description}</td>
    </tr>\n`;
  });

  // sending notifications
  if(last != message) {
    mails.forEach(mail => {
      send_epic_mail(mail, message);
    });
    write_last(message);
  } else {
    console.log("no new games since last run");
  }
}).catch(err => {
  console.log(err);
});

epic.js

// Epic Free Games
// https://www.npmjs.com/package/epic-free-games
// $ npm install epic-free-games nodemailer

const { EpicFreeGames } = require('epic-free-games');
const epicFreeGames = new EpicFreeGames({ country: 'PL', locale: 'pl', includeAll: true })

epicFreeGames.getGames().then(res => {
  var message = "";
  res.currentGames.forEach(function(item) {
    message = message + "GAME:<tr><td><a href=\"https://store.epicgames.com/pl/browse?q=" + encodeURIComponent(item.title) + "\">" + item.title + "</a></td><td>" + item.description + "</td></tr>\n";
  });
  console.log(message);
}).catch(err => {
  console.log(err);
});

epic.sh

#!/bin/bash

# Epic Free Games Newsletter

set -e

cd /root/bin/epic

EPIC=$(/usr/bin/node epic.js | grep ^GAME | sed 's/^GAME\://g;')

if [ ! -e epic.last ]; then
	echo $EPIC > epic.last
else
	echo $EPIC > epic.new
	set +e
	cmp --silent epic.last epic.new && echo "skip, no change since last run" && exit 0
	set -e
	mv epic.new epic.last
fi

send_epic_mail() {
	echo "sending to ${1}"
	echo -e "To: ${1}\nFrom: [email protected]\nContent-Type: text/html;\nSubject: Epic free games\n\n<h3>Epic free games</h3><table border=\"1\">${EPIC}</table>" | sendmail -t
}

if [[ "$EPIC" ]]; then
	send_epic_mail "[email protected]"
	send_epic_mail "[email protected]"
else
	echo "error: no output from epic.js"
fi

eslint.config.js

export default [
    {
        files: ["**/*.cjs"],
        rules: {}
    }
];

package.json

{
  "type": "module",
  "dependencies": {
    "epic-free-games": "^4.0.2",
    "eslint": "^9.12.0",
    "fs": "^0.0.1-security",
    "nodemailer": "^6.9.15"
  }
}