Add GitHub integration

[tom-leamon]

In order to sync user's code with their GitHub repo, you will need to use the GitHub API. First, your application will need to authenticate with GitHub on behalf of the user. This generally involves OAuth authentication flow where the user grants your application the required permissions to interact with their GitHub account.

Below is a high-level description of the steps involved:

1. User Authorization: Redirect the user to the GitHub's authorization endpoint. The user will login to their GitHub account and grant your application the necessary permissions.

2. Get Access Token: GitHub will redirect the user back to your application with an authorization code. You use this code to request an access token from GitHub.

3. Use Access Token: Once you have an access token, you can use it to authenticate requests to the GitHub API on behalf of the user.

Here is a simplified example of how you could use the GitHub API to create a new file in the user's repository:

const octokit = new Octokit({ auth: `personal-access-token123` });

octokit.request('PUT /repos/{owner}/{repo}/contents/{path}', {
  owner: 'octocat',
  repo: 'hello-world',
  path: 'path/to/file.txt',
  message: 'Commit message',
  content: Buffer.from('File content').toString('base64'),
  branch: 'branch-name'
});

In this example, Octokit is a client for the GitHub API. We create a new instance with the user's access token. We then call octokit.request with the PUT /repos/{owner}/{repo}/contents/{path} endpoint, which creates or updates a file in the repository.

To sync all the user's code, you would need to create or update a file for each file in the user's project.

Please note that interacting with GitHub or any other external service requires careful handling of user data and credentials. Always make sure to follow best practices for security and user privacy. You should also handle errors and edge cases, such as rate limits or temporary network errors.

Lastly, it's important to mention that GitHub has a comprehensive set of APIs which allow you to perform nearly any operation that you can do on the website, including creating and managing branches, creating pull requests, managing issues and more. Your application can leverage these capabilities to provide advanced features to your users.

Remember to always respect GitHub's API Terms of Service and Guidelines when integrating with their services.