Rocket.Chat/client/startup/renderMessage/highlightWords.js

import { Meteor } from 'meteor/meteor';
import { Tracker } from 'meteor/tracker';

import { callbacks } from '../../../app/callbacks';
import { getUserPreference } from '../../../app/utils';

Meteor.startup(() => {
	Tracker.autorun(() => {
		const isEnabled = getUserPreference(Meteor.userId(), 'highlights')?.some((highlight) => highlight?.trim()) ?? false;

		if (!isEnabled) {
			callbacks.remove('renderMessage', 'highlight-words');
			return;
		}

		const options = {
			wordsToHighlight: getUserPreference(Meteor.userId(), 'highlights')
				.filter((highlight) => highlight?.trim()),
		};

		import('../../../app/highlight-words').then(({ createHighlightWordsMessageRenderer }) => {
			const renderMessage = createHighlightWordsMessageRenderer(options);
			callbacks.remove('renderMessage', 'highlight-words');
			callbacks.add('renderMessage', renderMessage, callbacks.priority.MEDIUM + 1, 'highlight-words');
		});
	});
});