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import './hidden-review-comments-indicator.css';
import mem from 'mem';
import React from 'dom-chef';
import {$$} from 'select-dom';
import {CommentIcon} from '@primer/octicons-react';
import * as pageDetect from 'github-url-detection';
import delegate, {DelegateEvent} from 'delegate-it';
import features from '../feature-manager.js';
import preserveScroll from '../helpers/preserve-scroll.js';
import onAbort from '../helpers/abort-controller.js';
import observe from '../helpers/selector-observer.js';
// When an indicator is clicked, this will show comments on the current file
function handleIndicatorClick({delegateTarget}: DelegateEvent): void {
const commentedLine = delegateTarget.closest('tr')!.previousElementSibling!;
const resetScroll = preserveScroll(commentedLine);
delegateTarget
.closest('.file.js-file')!
.querySelector('input.js-toggle-file-notes')!
.click();
resetScroll();
}
// `mem` avoids adding the indicator twice to the same thread
const addIndicator = mem((commentThread: HTMLElement): void => {
const commentCount = commentThread.querySelectorAll('.review-comment.js-comment').length;
commentThread.before(
<tr>
<td className="rgh-comments-indicator blob-num" colSpan={2}>
<button type="button" className="btn-link">
<CommentIcon/>
<span>{commentCount}</span>
</button>
</td>
</tr>,
);
});
// Add indicator when the `show-inline-notes` class is removed (i.e. the comments are hidden)
const indicatorToggleObserver = new MutationObserver(mutations => {
for (const mutation of mutations) {
const file = mutation.target as HTMLElement;
const wasVisible = mutation.oldValue!.includes('show-inline-notes');
const isHidden = !file.classList.contains('show-inline-notes');
if (wasVisible && isHidden) {
for (const thread of $$('tr.inline-comments', file)) {
addIndicator(thread);
}
}
}
});
function init(signal: AbortSignal): void {
observe('.file.js-file', element => {
// #observe won't observe the same element twice
// TODO: toggle visibility via :has selector instead
indicatorToggleObserver.observe(element, {
attributes: true,
attributeOldValue: true,
attributeFilter: ['class'],
});
});
delegate('.rgh-comments-indicator', 'click', handleIndicatorClick, {signal});
onAbort(signal, indicatorToggleObserver);
}
void features.add(import.meta.url, {
include: [
pageDetect.isPRFiles,
],
init,
});
/*
Test URLs:
https://github.com/refined-github/sandbox/pull/18/files
*/
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