Rocket.Chat/app/message-snippet/server/methods/snippetMessage.js

import { Meteor } from 'meteor/meteor';

import { Subscriptions, Messages, Users, Rooms } from '../../../models';
import { settings } from '../../../settings';
import { callbacks } from '../../../../lib/callbacks';
import { isTheLastMessage } from '../../../lib';

Meteor.methods({
	snippetMessage(message, filename) {
		if (Meteor.userId() == null) {
			// noinspection JSUnresolvedFunction
			throw new Meteor.Error('error-invalid-user', 'Invalid user', { method: 'snippetMessage' });
		}

		const room = Rooms.findOne({ _id: message.rid });

		if (typeof room === 'undefined' || room === null) {
			return false;
		}

		const subscription = Subscriptions.findOneByRoomIdAndUserId(message.rid, Meteor.userId(), {
			fields: { _id: 1 },
		});
		if (!subscription) {
			return false;
		}

		const me = Users.findOneById(Meteor.userId());

		// If we keep history of edits, insert a new message to store history information
		if (settings.get('Message_KeepHistory')) {
			Messages.cloneAndSaveAsHistoryById(message._id, me);
		}

		message.snippeted = true;
		message.snippetedAt = Date.now;
		message.snippetedBy = {
			_id: Meteor.userId(),
			username: me.username,
		};

		message = callbacks.run('beforeSaveMessage', message);

		// Create the SnippetMessage
		Messages.setSnippetedByIdAndUserId(message, filename, message.snippetedBy, message.snippeted, Date.now, filename);
		if (isTheLastMessage(room, message)) {
			Rooms.setLastMessageSnippeted(room._id, message, filename, message.snippetedBy, message.snippeted, Date.now, filename);
		}

		Messages.createWithTypeRoomIdMessageAndUser('message_snippeted', message.rid, '', me, {
			snippetId: message._id,
			snippetName: filename,
		});
	},
});