prepguides.dev/callback.html at main · ishaileshpant/prepguides.dev · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>GitHub Authentication - PrepGuides.dev</title>
    <style>
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0;
            padding: 20px;
        }

        .auth-container {
            background: white;
            border-radius: 16px;
            padding: 40px;
            text-align: center;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
            max-width: 500px;
            width: 100%;
        }

        .loading {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
        }

        .spinner {
            width: 40px;
            height: 40px;
            border: 4px solid #f3f3f3;
            border-top: 4px solid #6366f1;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .success {
            color: #059669;
        }

        .error {
            color: #dc2626;
        }
    </style>
</head>
<body>
    <div class="auth-container">
        <div id="loading-state" class="loading">
            <div class="spinner"></div>
            <h2>Authenticating with GitHub...</h2>
            <p>Please wait while we complete your authentication.</p>
        </div>

        <div id="success-state" style="display: none;">
            <h2 class="success">✅ Authentication Successful!</h2>
            <p>You can now close this window and return to the main site.</p>
        </div>

        <div id="error-state" style="display: none;">
            <h2 class="error">❌ Authentication Failed</h2>
            <p id="error-message">There was an error during authentication.</p>
        </div>
    </div>

    <script>
        // Get OAuth parameters from URL
        const urlParams = new URLSearchParams(window.location.search);
        const code = urlParams.get('code');
        const state = urlParams.get('state');
        const error = urlParams.get('error');
        const errorDescription = urlParams.get('error_description');

        // Handle OAuth callback
        async function handleAuthCallback() {
            const loadingState = document.getElementById('loading-state');
            const successState = document.getElementById('success-state');
            const errorState = document.getElementById('error-state');
            const errorMessage = document.getElementById('error-message');

            try {
                // Check for OAuth errors
                if (error) {
                    showError(errorDescription || error);
                    return;
                }

                // Check for missing authorization code
                if (!code) {
                    showError('No authorization code received');
                    return;
                }

                // Process the OAuth callback
                const response = await fetch('/api/auth/github', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
                    },
                    body: JSON.stringify({
                        code: code,
                        state: state
                    })
                });

                if (!response.ok) {
                    const errorData = await response.json();
                    throw new Error(errorData.message || 'Authentication failed');
                }

                const tokenData = await response.json();

                // Get user info
                const userResponse = await fetch('https://api.github.com/user', {
                    headers: {
                        'Authorization': `token ${tokenData.access_token}`,
                        'Accept': 'application/vnd.github.v3+json'
                    }
                });

                if (userResponse.ok) {
                    const userData = await userResponse.json();

                    // Send success message to parent window
                    if (window.opener) {
                        window.opener.postMessage({
                            type: 'GITHUB_AUTH_SUCCESS',
                            access_token: tokenData.access_token,
                            user: userData
                        }, window.location.origin);
                    }

                    loadingState.style.display = 'none';
                    successState.style.display = 'block';

                    // Close popup after a short delay
                    setTimeout(() => {
                        window.close();
                    }, 2000);
                } else {
                    throw new Error('Failed to get user information');
                }
            } catch (error) {
                console.error('Auth callback error:', error);

                // Send error message to parent window
                if (window.opener) {
                    window.opener.postMessage({
                        type: 'GITHUB_AUTH_ERROR',
                        error: error.message
                    }, window.location.origin);
                }

                showError(error.message || 'An unexpected error occurred during authentication.');
            }
        }

        function showError(message) {
            const loadingState = document.getElementById('loading-state');
            const errorState = document.getElementById('error-state');
            const errorMessage = document.getElementById('error-message');

            loadingState.style.display = 'none';
            errorMessage.textContent = message;
            errorState.style.display = 'block';
        }

        // Start the authentication process when the page loads
        document.addEventListener('DOMContentLoaded', handleAuthCallback);
    </script>
</body>
</html>