The code defines a Node.js module that interacts with a ChromeDriver session using RESTful API endpoints and includes a function to retrieve window handles from the ChromeDriver. However, the code has several issues, including a function that doesn't use its intended parameter, a non-standard library that may require additional setup, and unimplemented routes in the Express router.

Cell 5

var fs = require('fs');
var path = require('path');
var express = require('express');
var router = express.Router();

function getWindowHandles() {
    return promisifyChrome('windows.getAll', {})
        .then(windows => {
            return {value: windows.map(w => w.id)};
        })
        .catch(e => console.log(e))
}

router.get('/session/:sessionId/window', (req, res) => {
    throw new Error('not implemented! ' + req.originalUrl + JSON.stringify(req.params).substr(0, 200));
}); //,"GetWindow",ExecuteGetCurrentWindowHandle,
router.get('/session/:sessionId/window_handle', (req, res) => {
    throw new Error('not implemented! ' + req.originalUrl + JSON.stringify(req.params).substr(0, 200));
}); //,"GetWindow",ExecuteGetCurrentWindowHandle,
router.get('/session/:sessionId/window/handles', (req, res) => {
    throw new Error('not implemented! ' + req.originalUrl + JSON.stringify(req.params).substr(0, 200));
}); //,"GetWindows",ExecuteGetWindowHandles,
router.get('/session/:sessionId/window_handles', (req, res) => {
    response(res, getWindowHandles(req.params['sessionId']));
}); //,"GetWindows",ExecuteGetWindowHandles,

module.exports = {
    getWindowHandles,
    router
}

// Import required modules
const express = require('express');
const router = express.Router();
const fs = require('fs');
const path = require('path');

// Define a function to promisify a chrome function
function promisifyChrome(method, params) {
    // Implementation for promisifyChrome function
    // For demonstration, assume it returns a function that takes a callback
    return (callback) => {
        // Simulate the chrome function call
        setTimeout(() => {
            callback(null, { windows: [{ id: 1 }, { id: 2 }] });
        }, 100);
    };
}

// Define a function to get window handles
async function getWindowHandles(sessionId) {
    try {
        const windows = await promisifyChrome('windows.getAll', {})(() => {});
        return windows.map(w => w.id);
    } catch (error) {
        console.error(error);
        throw error;
    }
}

// Define a function to create a response
function response(res, data) {
    res.json(data);
}

// Define routes for window handles
router.get('/session/:sessionId/window', (req, res) => {
    throw new Error(`Endpoint not implemented: ${req.originalUrl} ${JSON.stringify(req.params).substr(0, 200)}`);
});

router.get('/session/:sessionId/window_handle', (req, res) => {
    throw new Error(`Endpoint not implemented: ${req.originalUrl} ${JSON.stringify(req.params).substr(0, 200)}`);
});

router.get('/session/:sessionId/window/handles', (req, res) => {
    throw new Error(`Endpoint not implemented: ${req.originalUrl} ${JSON.stringify(req.params).substr(0, 200)}`);
});

router.get('/session/:sessionId/window_handles', (req, res) => {
    try {
        const sessionId = req.params['sessionId'];
        const windowHandles = getWindowHandles(sessionId);
        response(res, { sessionId, windowHandles });
    } catch (error) {
        console.error(error);
        res.status(500).json({ message: 'Error fetching window handles' });
    }
});

// Export the router
module.exports = { getWindowHandles, router };

Code Breakdown

Requires and Dependencies

• fs (File System) and path are Node.js built-in modules for file system operations.
• express is a popular Node.js web framework for building web applications.
• promisifyChrome is not a standard library, it is likely a custom function that wraps a ChromeDriver API call to make it promise-based.

getWindowHandles Function

• Returns an array of window handles from the ChromeDriver.
• Uses promisifyChrome to call the windows.getAll method, which returns a promise.
• If the promise resolves, it maps the window objects to their IDs and returns the array.
• If the promise rejects, it logs the error to the console.

Express Router

• Defines four routes for interacting with a WebDriver session (ChromeDriver) using RESTful API endpoints.
• The routes are:
  • /session/:sessionId/window (GET): Not implemented.
  • /session/:sessionId/window_handle (GET): Not implemented.
  • /session/:sessionId/window/handles (GET): Not implemented.
  • /session/:sessionId/window_handles (GET): Calls the getWindowHandles function with the session ID from the URL parameter.

Module Exports

• Exports the getWindowHandles function and the Express router instance.

Notes

• The getWindowHandles function is not actually using the req.params object, it should be updated to use the session ID from the URL parameter.
• The promisifyChrome function is not a standard library and may require additional setup or configuration.
• The Express router is not actually handling any requests, the routes are marked as "Not implemented".