index.js

const express = require("express");
const path = require("path");
const fs = require("fs");

const app = express();
// Serve static files from the "public" directory
app.use(express.static(path.join(__dirname, "public")));

// Add a GET method for /index route
app.get("/", (req, res) => {
  res.redirect("/index.html");
});

// Add a GET method for /learning route
app.get("/learning", (req, res) => {
  res.sendFile(path.join(__dirname, "public/learning.html"));
});

// Add a GET method for /service-a path
app.get("/service-a", (req, res) => {
  res.sendFile(path.join(__dirname, "public/service_a.html"));
});

// Add a GET method for /service-b path
app.get("/service-b", (req, res) => {
  res.sendFile(path.join(__dirname, "public/service_b.html"));
});

// Generate a random color
function getRandomColor() {
  const letters = "0123456789ABCDEF";
  let color = "#";
  for (let i = 0; i < 6; i++) {
    color += letters[Math.floor(Math.random() * 16)];
  }
  return color;
}

// Modify the content of index.html
const indexHtmlPath = path.join(__dirname, "public", "index.html");
fs.readFile(indexHtmlPath, "utf8", (err, data) => {
  if (err) {
    console.error("Error reading index.html:", err);
    return;
  }

  // Replace the color of the h1 element with a random color
  const modifiedData = data.replace(
    /<h1 id="welcome" style="color:.*?;">/,
    `<h1 id="welcome" style="color:${getRandomColor()};">`
  );

  // Write the modified content back to index.html
  fs.writeFile(indexHtmlPath, modifiedData, "utf8", (err) => {
    if (err) {
      console.error("Error writing index.html:", err);
      return;
    }
    console.log("index.html modified successfully");
  });
});

// Start the server
app.listen(3000, () => {
  console.log("Server is running on port 3000");
});

/*Below code block use to simulate a container crash after 15 seconds from started*/
// Sleep function using setTimeout
// function sleep(ms) {
//   return new Promise(resolve => setTimeout(resolve, ms));
// }

// // Usage
// async function main() {
//   console.log('Before sleep');
//   await sleep(15000); // Sleep for 15 seconds
//   console.log('Container crashed after 15s');
//   process.exit(101);
// }

// main();