skeleton.js

/**
 * Skeleton for Web Screenshot Service using Puppeteer-Cluster and PDF generation.
 * Students: Fill in the missing pieces (e.g., concurrency options, PDF creation steps, etc.).
 */

const { Cluster } = require("puppeteer-cluster");
// TODO: import fs, path, and pdf-lib (PDFDocument) libraries if you need them

(async () => {
  try {
    // 1. Create necessary directories (screenshotsDir)
    // HINT: Use fs.existsSync(...) and fs.mkdirSync(...)
    // 2. Launch the Puppeteer-Cluster with the desired concurrency
    // Example:
    // const cluster = await Cluster.launch({
    //   // concurrency: Cluster.CONCURRENCY_BROWSER,
    //   // maxConcurrency: 3,
    //   // puppeteerOptions: { headless: true }
    // });
    // 3. Define the cluster task to visit each URL and capture a screenshot
    // Example:
    // await cluster.task(async ({ page, data: url }) => {
    //   // ...
    // });
    // 4. Queue up a few URLs
    // Example:
    // const urls = ["https://example.com"];
    // urls.forEach(url => cluster.queue(url));
    // 5. Wait for cluster tasks to complete
    // await cluster.idle();
    // await cluster.close();
    // 6.(OPTIONAL) Generate a PDF from the captured images
    // HINT: Use the PDFDocument from pdf-lib
    // 7. (OPTIONAL)Clean up the screenshots folder
    // HINT: Use fs.unlinkSync(...) if needed
    // 8. Everytime you generate a pdf try naming it with a unique name and can embed the timestamp in the name
  } catch (error) {
    console.error("An error occurred in the skeleton script:", error);
  }
})();