/**

Given any element in a comment, returns the comment’s author

This works on:

- First comment

- Following comments

- Main review comment

- Following review comments

- Gist comments

- Bots

Note: Bots are used as `name[bot]`, `app/name`, or `apps/name` depending on the context:

- https://github.com/webpack/webpack/commits?author=dependabot%5Bbot%5D

- https://github.com/webpack/webpack/pulls/app%2Fdependabot

- https://github.com/apps/dependabot

@returns user-name or dependabot[bot]

*/

export default function getCommentAuthor(anyElementInsideComment: Element): string {

const avatar: HTMLImageElement = anyElementInsideComment

.closest([

'.TimelineItem', // PR comments (and pre-issue redesign issue comments)

'.review-comment', // PR review comments

'.react-issue-body', // First issue comment

'.react-issue-comment', // Issue comments

'[data-testid="comment-header"]', // Commit comments

])!

.querySelector([

'.TimelineItem-avatar img', // PR comments (and pre-issue redesign issue comments)

'img.avatar', // PR review comments

'img[data-testid="github-avatar"]', // Issue comments

'img[data-component="Avatar"]', // Commit comments

])!;

const name = avatar

.alt // Occasionally ends with `[bot]`

.replace(/^@/, ''); // May or may not be present

if (!name.endsWith('[bot]') && avatar.closest('[href^="https://github.com/apps/"]')) {

// Example: https://github.com/webpack/webpack/pull/15926#issuecomment-1170670173

return name + '[bot]';

}

return name;

}