terminal.js

const readline = require('readline');

const REFRESH_INTERVAL = 50;

// Function to clear the terminal
function clearTerminal() {
  console.clear();
}

// Function to generate random characters
function getRandomCharacter() {
  const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  return characters.charAt(Math.floor(Math.random() * characters.length));
}

// Function to generate a random color using ANSI escape codes
function getRandomColor() {
  // ANSI escape codes for foreground colors (30–37 are standard colors)
  const colorCodes = [
    '\x1b[31m', // Red
    '\x1b[32m', // Green
    '\x1b[33m', // Yellow
    '\x1b[34m', // Blue
    '\x1b[35m', // Magenta
    '\x1b[36m', // Cyan
    '\x1b[37m', // White
  ];
  return colorCodes[Math.floor(Math.random() * colorCodes.length)];
}

// Function to reset the color to default
function resetColor() {
  return '\x1b[0m'; // ANSI escape code to reset color
}

// Function to generate a box frame with random colored characters inside
function generateBoxFrame(width, height) {
  const horizontalBorder = '─';
  const verticalBorder = '│';
  const topLeftCorner = '┌';
  const topRightCorner = '┐';
  const bottomLeftCorner = '└';
  const bottomRightCorner = '┘';

  let frame = '';

  // Top border
  frame += topLeftCorner + horizontalBorder.repeat(width - 2) + topRightCorner + '\n';

  // Middle rows with random colored characters
  for (let i = 0; i < height - 2; i++) {
    let row = verticalBorder; // Left border
    for (let j = 0; j < width - 2; j++) {
      const randomChar = getRandomCharacter();
      const coloredChar = getRandomColor() + randomChar + resetColor(); // Apply random color and reset
      row += coloredChar;
    }
    row += verticalBorder + '\n'; // Right border
    frame += row;
  }

  // Bottom border
  frame += bottomLeftCorner + horizontalBorder.repeat(width - 2) + bottomRightCorner + '\n';

  return frame;
}

// Function to continuously refresh the terminal with the box frame
function startRefreshingScreen() {
  setInterval(() => {
    const { columns: width, rows: height } = process.stdout;

    // Clear the terminal
    clearTerminal();

    // Generate and print the box frame with random colored characters
    const frame = generateBoxFrame(width, height - 1); // -1 to fit the terminal
    process.stdout.write(frame);
  }, REFRESH_INTERVAL); // Refresh interval
}

// Start the rendering loop
startRefreshingScreen();