LeetCode to GitHub Extension

A Chrome extension that automatically syncs your LeetCode solutions to your GitHub repository as .java files with proper naming conventions and source URLs.

🚀 Features

• Automatic Java File Creation: Converts any LeetCode solution to .java format
• Smart File Naming: Uses camelCase convention (e.g., "Two Sum" → twoSum.java)
• Source URL Tracking: Adds the LeetCode problem URL as a comment at the top of each file
• GitHub Integration: Direct upload to your specified GitHub repository
• Manual Code Capture: Easy-to-use interface for capturing and uploading solutions
• File Overwriting: Updates existing solutions automatically
• Secure Token Storage: Your GitHub token is stored locally and encrypted

📦 Installation

Option 1: Load as Unpacked Extension (Developer Mode)

1. Download or clone this repository
2. Open Chrome and navigate to chrome://extensions/
3. Enable "Developer mode" (toggle in top right)
4. Click "Load unpacked" and select the extension folder
5. The extension icon should appear in your toolbar

Option 2: Chrome Web Store

*Coming soon

⚙️ Setup

1. Generate GitHub Personal Access Token

1. Go to GitHub Settings → Developer settings → Personal access tokens
2. Click "Generate new token (classic)"
3. Give it a descriptive name like "LeetCode Extension"
4. Select the following scopes:
   • repo (Full control of private repositories)
   • public_repo (Access to public repositories)
5. Click "Generate token" and copy the token immediately

2. Configure the Extension

1. Click the extension icon in your Chrome toolbar
2. Paste your GitHub token in the "GitHub Token" field
3. Enter your repository in the format: username/repository-name
   • Example: johnsmith/leetcode-solutions
4. Click "Save Configuration"

🎯 Usage

Method 1: Manual Capture (Recommended)

1. Navigate to any LeetCode problem page
2. Write and test your solution in the LeetCode editor
3. Click the green "📤 Capture & Upload to GitHub (.java)" button that appears on the page
4. Follow the popup instructions:
   • Select all your code (Ctrl+A)
   • Copy it (Ctrl+C)
   • Click OK
5. Your solution will be automatically uploaded as a .java file

📁 File Structure

Your solutions will be saved with the following structure:

your-repo/
├── twoSum.java
├── addTwoNumbers.java
├── longestSubstringWithoutRepeatingCharacters.java
└── ...

Each file includes:

• URL Comment: The LeetCode problem URL at the top
• Your Solution: The complete Java code you wrote

Example file content:

//https://leetcode.com/problems/two-sum/
class Solution {
    public int[] twoSum(int[] nums, int target) {
        // Your solution here
    }
}

🔧 Technical Details

File Naming Convention

• Converts problem titles to camelCase
• Removes special characters and numbers
• Examples:
  • "1. Two Sum" → twoSum.java
  • "Add Two Numbers" → addTwoNumbers.java
  • "Longest Substring Without Repeating Characters" → longestSubstringWithoutRepeatingCharacters.java

Security

• GitHub tokens are stored locally using Chrome's secure storage API
• No data is sent to external servers except GitHub's official API
• All operations are performed client-side

Permissions Required

• activeTab: To read the current LeetCode page
• storage: To save your GitHub configuration
• clipboardRead: To capture code from clipboard
• scripting: To inject the capture button
• Host permissions for LeetCode and GitHub API

🐛 Troubleshooting

Common Issues

"Please configure GitHub token first"

• Make sure you've entered a valid GitHub personal access token
• Verify the token has repo permissions
• Check that your repository exists and is accessible

"Upload failed: Configuration missing"

• Double-check your repository format: username/repo-name
• Ensure your GitHub token hasn't expired
• Verify the repository exists

"No code found in clipboard"

• Make sure to copy your code (Ctrl+C) before clicking the capture button
• Try refreshing the page and attempting again
• Ensure clipboard permissions are granted to the extension

Extension button not appearing

• Refresh the LeetCode problem page
• Make sure you're on a /problems/ URL
• Check that the extension is enabled in chrome://extensions/

Manual Upload Issues

• If automatic capture fails, use the extension popup
• Copy your code and paste it manually in the popup
• The problem title should auto-populate from the current page

🤝 Contributing

Contributions are welcome! Please feel free to submit issues and pull requests.

Development Setup

1. Clone the repository
2. Make your changes
3. Test by loading as unpacked extension
4. Submit a pull request

Planned Features

• Support for multiple programming languages
• Batch upload functionality
• Custom file organization options
• Solution statistics and tracking

📞 Support

If you encounter any issues or have feature requests:

1. Check the troubleshooting section above
2. Open an issue on GitHub
3. Include your Chrome version and extension version in bug reports

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Happy Coding! 🚀

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