Added Amazon price tracker (#916)

* Added Amazon price tracker

* Updated Demo Video

* Added Read Me file

* Upated the repositry after correction

* Update ReadMe.md

* Removed Extra Lines

* Added package files

* Delete package.json

Co-authored-by: vybhav72954 <[email protected]>

Author: haarsh01

JavaScript/Amazon_Price_Tracker/ReadMe.md

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+# Amazon Price Tracker
+
+A Script to track prices of products from Amazon.
+
+## Setup
+
+1. Clone the folder.  
+2. Open command line and change the directory to your folder by using ```cd foldername```.
+3. Run the command ```npm install```.
+4. Then run the script using command ```node index.js```.
+
+# Output
+
+![output-video] https://urlzs.com/9WgxH
+
+![img] https://urlzs.com/gqyCG
+
+# Author
+
+[Harsh Kaushik](https://github.com/haarsh01)

JavaScript/Amazon_Price_Tracker/index.js

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+const axios = require('axios');
+const cheerio = require('cheerio');
+const cron = require('node-cron');
+const nodemailer = require('nodemailer')
+const fetchPrice = async(url, targetPrice) =>{
+    const response = await axios.get(url);
+    const html = response.data;
+    const $ = cheerio.load(html);
+    const priceText = $('#priceblock_ourprice').text();
+    const price = parseFloat(priceText.replace('$',''));
+    if(targetPrice >= price){
+        sendEmail(url,price);
+    }else{
+        console.log('too expensive');
+    }
+}
+const sendEmail = async (url, price) => {
+    const testAccount = await nodemailer.createTestAccount();
+    const transport = nodemailer.createTransport({
+        host:'smtp.ethereal.email',
+        port: 587,
+        secure: false,
+        auth:{
+            user: testAccount.user,
+            pass:testAccount.pass,
+        }
+
+    });
+const info = await transport.sendMail({
+    from:'"UI Infinity" <[email protected]>',
+    to:'[email protected]',
+    subject:'amazon watcher',
+    text:`${price} - ${url}`,
+    html:`<p>${price}</p><p>${url}</p>`,
+});
+console.log(nodemailer.getTestMessageUrl(info));
+}
+
+const watchPrice = (priceTaget, url, schedule = '*/5 * * * * *') => {
+    cron.schedule(schedule, () => fetchPrice(url, priceTaget));
+};

JavaScript/Amazon_Price_Tracker/package-lock.json

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+{
+  "name": "amazon-price-tracker",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "axios": "^0.21.1",
+    "cheerio": "^1.0.0-rc.6",
+    "node-cron": "^3.0.0",
+    "nodemailer": "^6.5.0"
+  }
+}