nQuesFromGFG_LC.js

const puppeteer = require('puppeteer');
let createPDF=require("./convertJSON2PDF")
let getQuestionsGFG= require("./getQuestionsFromGFG").getQues;
let getQuestionsLC = require("./getQuestionsFromLC").getQues;
const readline = require("readline");
let questions = {}
let mainPage;
let mainBrowser;

let rl = readline.createInterface(
    process.stdin,
    process.stdout
)

rl.question("Which DSA do you want to practice ? \n", async function (topic) {
rl.question("Number of Questions you want to practice\n",async function(numQues){
rl.question("Enter your difficulty level:(Easy,Medium,Hard,All)\n",async function(difficulty)
{    
    if(difficulty.toLowerCase()=="easy")
    { 
        await questionsGFG(topic,numQues,0);
        await questionsLC(topic,numQues,0);
    }
    else if(difficulty.toLowerCase()=="medium")
    {     
        await questionsGFG(topic,numQues,1);
        await questionsLC(topic,numQues,1);
    }
    else if(difficulty.toLowerCase()=="hard")
    {      
        await questionsGFG(topic,numQues,2);
        await questionsLC(topic,numQues,2);
    }
    else
    {
        await questionsGFG(topic,numQues);
        await questionsLC(topic,numQues);
    }

    rl.close();
})
})
})

async function questionsGFG(dsaTopic, numQues, difficulty) {
const browser = await puppeteer.launch({
    headless: false,
    defaultViewport: null,
    args: ["--start-maximized"],
    slowMo: 50
});

let allPages = await browser.pages();
const pageGFG = allPages[0];
await pageGFG.setDefaultTimeout(60000)
mainBrowser=browser;
mainPage=pageGFG;

await pageGFG.goto('https://practice.geeksforgeeks.org/explore/?page=1');
await pageGFG.reload();
await pageGFG.waitForSelector(".panel.problem-block div>span",{visible:true})
await pageGFG.waitForSelector("div[href='#collapse4'] h4");

await pageGFG.evaluate(function () {
    document.querySelector("div[href='#collapse4'] h4").click();
    document.querySelector("#moreCategories").click();
})
await pageGFG.waitForSelector("#searchCategories");
await pageGFG.type("#searchCategories", dsaTopic)

await pageGFG.$('[style="font-size: 12px; padding: 10px; display: block;"]')
.then(async function(topicAvailable)
{
    if(topicAvailable!=null)
    await pageGFG.click('[style="font-size: 12px; padding: 10px; display: block;"]', { delay: 2000 })
    else
    {
    console.log(`${dsaTopic} questions are not availabe on GFG`);
    await questionsLC(dsaTopic,numQues,difficulty);
    process.exit(0);
    }
})
await pageGFG.click("#selectCategoryModal", { delay: 500 })
await pageGFG.click("div[href='#collapse1'] h4", { delay: 2000 });

if(difficulty==0)
{
    questions["Easy Questions: "] = await getQuestionsGFG(pageGFG, numQues,0, false);  
}
else if(difficulty==1)
{
    questions["Medium Questions: "] =  await getQuestionsGFG(pageGFG, numQues,1, false)
}
else if(difficulty==2)
{
    questions["Hard Questions: "] =  await getQuestionsGFG(pageGFG, numQues,2, false)
}
else
{
    questions["Easy Questions: "] = await getQuestionsGFG(pageGFG, numQues, 0, true); 
    questions["Medium Questions: "] =  await getQuestionsGFG(pageGFG, numQues, 1, true)
    questions["Hard Questions: "] =  await getQuestionsGFG(pageGFG, numQues, 2, true)  
}

createPDF(JSON.stringify(questions),dsaTopic,"GFG");

}

async function questionsLC(dsaTopic,numQues, difficulty) {
const pageLC = mainPage;
await pageLC.goto('https://leetcode.com/problemset/all/');
await pageLC.click("#headlessui-popover-button-17", { delay: 1000 })
await pageLC.click("[placeholder='Filter topics']", { delay: 1000 })
await pageLC.type("[placeholder='Filter topics']", dsaTopic)
await pageLC.$(".mt-4.text-red-s")
.then(async function(questionsAvailable)
{
    if(questionsAvailable==null)
    await pageLC.click(".flex.flex-wrap.py-4.-m-1 span")
    else
    {
    console.log(`${dsaTopic} questions not available on LeetCode.`);
    process.exit(0);
    }
})

if(difficulty==0)
questions["Easy Questions: "] = await getQuestionsLC(pageLC, difficulty, numQues);
else if(difficulty==1)
questions["Medium Questions: "] = await getQuestionsLC(pageLC, difficulty, numQues);
else if(difficulty==2)
questions["Hard Questions: "] = await getQuestionsLC(pageLC, difficulty, numQues);
else
{
    questions["Easy Questions: "] = await getQuestionsLC(pageLC, 0, numQues);
    questions["Medium Questions: "] = await getQuestionsLC(pageLC, 1, numQues);
    questions["Hard Questions: "] = await getQuestionsLC(pageLC, 2, numQues);
}

    createPDF(JSON.stringify(questions),dsaTopic,"LeetCode");
    mainBrowser.close();

}

module.exports;