Potential solution

The plan to solve the bug involves implementing the Google sign-in feature by making changes to the front end (index.html, styles.css, scripts.js) and the back end (server.js). The reasoning behind this solution is that the absence of necessary code for Google sign-in in these files is causing the bug. By adding the required code, we can enable users to sign in using their Google accounts.

What is causing this bug?

The bug is caused by the absence of code necessary for implementing Google sign-in functionality. Specifically:

index.html: Missing Google API script and Google sign-in button.
styles.css: Missing styles for the Google sign-in button.
scripts.js: Missing JavaScript code to initialize the Google API and handle sign-in responses.
server.js: Missing server-side code to verify the Google sign-in token and manage user sessions.

Code

`index.html`

Add the Google API script and the Google sign-in button.

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Fall Limited Edition Sneakers</title>
  <link rel="stylesheet" href="styles.css" />
  <script src="https://apis.google.com/js/platform.js" async defer></script>
  <meta name="google-signin-client_id" content="YOUR_GOOGLE_CLIENT_ID.apps.googleusercontent.com">
</head>
<body>
  <nav class="top-nav">
    <a class="top-nav-item nav-hamburger-menu" href="#">
      <img src="images/icon-menu.svg" alt="hamburger menu" />
    </a>
    <a href="#" class="top-nav-item nav-company-logo">
      <img src="images/logo.svg" alt="company logo: sneakers" />
    </a>
    <a href="#" class="top-nav-item nav-cart-icon">
      <img src="images/icon-cart.svg" alt="shopping cart" />
    </a>
    <a href="#" class="top-nav-item nav-avatar">
      <img src="images/image-avatar.png" alt="user avatar" class="user-avatar" />
    </a>
    <!-- Google Sign-In Button -->
    <div class="g-signin2" data-onsuccess="onSignIn"></div>
  </nav>
  <main class="main-container">
    <img src="images/iamge-product-1.jpg" alt="fall limited edition sneakers" class="product-image" />
    <section class="product-details-container">
      <h3 class="company-category">Sneaker company</h3>
      <h2>Fall Limited Edition Sneakers</h2>
      <p class="product-description">
        These low-profile sneakers are your perfect casual wear companion. Featuring a durable rubber outer sole,
        they'll withstand everything the weather can offer.
      </p>
      <div class="prices-container">
        <span class="new-price">$125.00</span>
        <span class="price-percentage">50%</span>
        <span class="old-price">$250.00</span>
      </div>
      <button class="add-to-cart">
        <span>
          <img src="images/icon-cart.svg" alt="cart" />
        </span>
        Add to cart
      </button>
    </section>
  </main>
  <script src="scripts.js"></script>
</body>
</html>

`styles.css`

Add styles for the Google sign-in button.

.google-signin-button {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #4285F4; /* Google Blue */
  color: white;
  font-weight: 700;
  font-size: 1rem;
  border-radius: 4px;
  padding: 10px 20px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.google-signin-button:hover {
  background-color: #357ae8; /* Darker Google Blue */
}

.google-signin-button img {
  height: 20px;
  margin-right: 10px;
}

`scripts.js`

Add JavaScript code to initialize the Google API and handle sign-in responses.

// Load the Google API
function loadGoogleAPI() {
    gapi.load('auth2', function() {
        gapi.auth2.init({
            client_id: 'YOUR_GOOGLE_CLIENT_ID.apps.googleusercontent.com'
        });
    });
}

// Render the Google Sign-In button
function renderGoogleSignInButton() {
    gapi.signin2.render('google-signin-button', {
        'scope': 'profile email',
        'width': 240,
        'height': 50,
        'longtitle': true,
        'theme': 'dark',
        'onsuccess': onSignIn,
        'onfailure': onFailure
    });
}

// Handle the sign-in response
function onSignIn(googleUser) {
    var profile = googleUser.getBasicProfile();
    console.log('ID: ' + profile.getId());
    console.log('Name: ' + profile.getName());
    console.log('Image URL: ' + profile.getImageUrl());
    console.log('Email: ' + profile.getEmail());

    // Send the ID token to the server
    var id_token = googleUser.getAuthResponse().id_token;
    fetch('/api/google-signin', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json'
        },
        body: JSON.stringify({ token: id_token })
    }).then(response => {
        if (response.ok) {
            console.log('Successfully signed in');
        } else {
            console.log('Failed to sign in');
        }
    });
}

// Handle sign-in failure
function onFailure(error) {
    console.log(error);
}

// Initialize the Google API and render the sign-in button on page load
window.onload = function() {
    loadGoogleAPI();
    renderGoogleSignInButton();
};

`server.js`

Add server-side code to verify the Google sign-in token and manage user sessions.

const express = require('express');
const bodyParser = require('body-parser');
const { OAuth2Client } = require('google-auth-library');
const session = require('express-session');

const app = express();
const CLIENT_ID = 'YOUR_GOOGLE_CLIENT_ID';
const client = new OAuth2Client(CLIENT_ID);

app.use(bodyParser.json());
app.use(session({
  secret: 'your_secret_key',
  resave: false,
  saveUninitialized: true,
}));

app.post('/api/google-signin', async (req, res) => {
  const { token } = req.body;
  try {
    const ticket = await client.verifyIdToken({
      idToken: token,
      audience: CLIENT_ID,
    });
    const payload = ticket.getPayload();
    const userid = payload['sub'];

    // Create user session
    req.session.userId = userid;
    res.status(200).send({ message: 'User authenticated', userId: userid });
  } catch (error) {
    res.status(401).send({ message: 'Invalid token' });
  }
});

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});

How to replicate the bug

Without the Fix:
- Open the application in a web browser.
- Attempt to sign in using Google.
- Observe that there is no Google sign-in button and no functionality for Google sign-in.
With the Fix:
- Apply the changes to index.html, styles.css, scripts.js, and server.js.
- Open the application in a web browser.
- Observe the presence of the Google sign-in button.
- Click the Google sign-in button and complete the sign-in process.
- Verify that the sign-in is successful and the user session is created.

By following these steps, you can replicate the bug and verify that the fix resolves the issue.

Click here to create a Pull Request with the proposed solution

Files used for this task:

Changes on styles.css

## Analysis of `styles.css` The provided `styles.css` file contains various CSS rules for styling different elements of a webpage. The file includes styles for the overall layout, navigation bar, product details, and buttons. However, it does not currently include any styles specifically for a Google sign-in button. ## Potential Cause of the Bug Since the task is to implement a Google sign-in feature, the absence of CSS rules for the Google sign-in button could be a contributing factor to the bug. Without these styles, the button may not appear correctly or may not be visually integrated with the rest of the webpage. ## Recommendations To address the issue, you should add CSS rules to style the Google sign-in button. Below is an example of how you might style the button: ```css .google-signin-button { display: flex; align-items: center; justify-content: center; background-color: #4285F4; /* Google Blue */ color: white; font-weight: 700; font-size: 1rem; border-radius: 4px; padding: 10px 20px; cursor: pointer; transition: background-color 0.3s ease; } .google-signin-button:hover { background-color: #357ae8; /* Darker Google Blue */ } .google-signin-button img { height: 20px; margin-right: 10px; } ``` ## Conclusion The `styles.css` file does not currently include styles for the Google sign-in button, which could be a reason for the bug. Adding the recommended CSS rules should help in properly displaying and styling the Google sign-in button, thereby resolving the issue.

Changes on server.js

# Analysis Report for `server.js` ## Overview The `server.js` file is currently empty. According to the plan, this file is intended to handle the server-side logic for verifying the Google sign-in token and managing user sessions. ## Potential Causes of the Bug Since the file is empty, the server-side functionality for Google sign-in is missing entirely. This would result in the following issues: 1. **Token Verification Failure**: Without server-side code to verify the Google sign-in token, the application cannot authenticate users who sign in using Google. 2. **Session Management Issues**: Without code to manage user sessions, the application cannot maintain user state, leading to potential issues with user experience and security. ## Next Steps To address the bug, the following steps should be taken: 1. **Implement Token Verification**: Add code to verify the Google sign-in token using Google's OAuth2 API. 2. **Manage User Sessions**: Add code to create and manage user sessions after successful token verification. ## Example Implementation Here is a basic example of what the `server.js` file might look like: ```javascript const express = require('express'); const bodyParser = require('body-parser'); const { OAuth2Client } = require('google-auth-library'); const session = require('express-session'); const app = express(); const CLIENT_ID = 'YOUR_GOOGLE_CLIENT_ID'; const client = new OAuth2Client(CLIENT_ID); app.use(bodyParser.json()); app.use(session({ secret: 'your_secret_key', resave: false, saveUninitialized: true, })); app.post('/api/google-signin', async (req, res) => { const { token } = req.body; try { const ticket = await client.verifyIdToken({ idToken: token, audience: CLIENT_ID, }); const payload = ticket.getPayload(); const userid = payload['sub']; // Create user session req.session.userId = userid; res.status(200).send({ message: 'User authenticated', userId: userid }); } catch (error) { res.status(401).send({ message: 'Invalid token' }); } }); app.listen(3000, () => { console.log('Server is running on port 3000'); }); ``` ## Conclusion The `server.js` file is currently empty, which is the root cause of the bug related to Google sign-in functionality. Implementing the necessary server-side code for token verification and session management will resolve the issue.

Changes on scripts.js

# Analysis Report for `scripts.js` ## Overview The file `scripts.js` is currently empty. According to the task plan, this file is supposed to handle the Google sign-in functionality, including initializing the Google API and managing the sign-in response. ## Potential Causes of the Bug Since the file is empty, the bug is likely due to the absence of the necessary JavaScript code to implement the Google sign-in feature. Without this code, the application cannot initialize the Google API or handle user sign-ins, leading to the reported issue. ## Recommendations To resolve the issue, the following steps should be taken: 1. **Initialize the Google API**: Add the necessary code to load and initialize the Google API. 2. **Add Google Sign-In Button**: Ensure that the Google sign-in button is properly rendered and functional. 3. **Handle Sign-In Response**: Implement the logic to handle the sign-in response, including verifying the user's identity and managing sessions. ### Example Implementation Here is a basic example of what the `scripts.js` file might look like after implementing the required functionality: ```javascript // Load the Google API function loadGoogleAPI() { gapi.load('auth2', function() { gapi.auth2.init({ client_id: 'YOUR_CLIENT_ID.apps.googleusercontent.com' }); }); } // Render the Google Sign-In button function renderGoogleSignInButton() { gapi.signin2.render('google-signin-button', { 'scope': 'profile email', 'width': 240, 'height': 50, 'longtitle': true, 'theme': 'dark', 'onsuccess': onSignIn, 'onfailure': onFailure }); } // Handle the sign-in response function onSignIn(googleUser) { var profile = googleUser.getBasicProfile(); console.log('ID: ' + profile.getId()); console.log('Name: ' + profile.getName()); console.log('Image URL: ' + profile.getImageUrl()); console.log('Email: ' + profile.getEmail()); // Send the ID token to the server var id_token = googleUser.getAuthResponse().id_token; fetch('/tokensignin', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ id_token: id_token }) }).then(response => { if (response.ok) { console.log('Successfully signed in'); } else { console.log('Failed to sign in'); } }); } // Handle sign-in failure function onFailure(error) { console.log(error); } // Initialize the Google API and render the sign-in button on page load window.onload = function() { loadGoogleAPI(); renderGoogleSignInButton(); }; ``` ## Conclusion The absence of code in `scripts.js` is the primary cause of the bug. Implementing the Google sign-in functionality as described above should resolve the issue.

Changes on index.html

# Analysis Report for `index.html` ## Overview The `index.html` file is a basic HTML document for a product page featuring "Fall Limited Edition Sneakers." The page includes a navigation bar, a main content area with product details, and a button to add the product to the cart. ## Task The task for this file is to add a Google sign-in button and include the Google API script. ## Potential Issues 1. **Missing Google Sign-In Button**: The current HTML does not include a Google sign-in button. 2. **Missing Google API Script**: The Google API script necessary for handling Google sign-in is not included. ## Steps to Implement the Task ### 1. Add Google API Script Include the Google API script in the `` section of the HTML file. ```html Fall Limited Edition Sneakers ``` ### 2. Add Google Sign-In Button Add the Google sign-in button within the `` section, preferably in the navigation bar or a prominent location. ```html

Sneaker company

FallLmited Edition Sneakers

These low-profile sneakers are your perfect casual wear companion. Featuring a durable rubber outer sole, they'll withstand everything the weather can offer.

$125.00 50% $250.00

``` ### Summary The `index.html` file needs to be updated to include the Google API script and a Google sign-in button. These additions will enable users to sign in using their Google accounts. The changes should be made in the `` and `` sections as described above. This file appears to be relevant to the bug as it is part of the task to implement Google sign-in functionality.

robson972 / practice

Task Tile #2