bigbluebutton-Github/bigbluebutton-html5/imports/api/annotations/server/methods/undoAnnotation.js

import { getMultiUserStatus } from '/imports/api/common/server/helpers';
import RedisPubSub from '/imports/startup/server/redis';
import { Meteor } from 'meteor/meteor';
import { check } from 'meteor/check';

import isPodPresenter from '/imports/api/presentation-pods/server/utils/isPodPresenter';

export default function undoAnnotation(credentials, whiteboardId) {
  const REDIS_CONFIG = Meteor.settings.private.redis;
  const CHANNEL = REDIS_CONFIG.channels.toAkkaApps;
  const EVENT_NAME = 'UndoWhiteboardPubMsg';

  const { meetingId, requesterUserId, requesterToken } = credentials;

  check(meetingId, String);
  check(requesterUserId, String);
  check(requesterToken, String);
  check(whiteboardId, String);

  const allowed = isPodPresenter(meetingId, whiteboardId, requesterUserId)
    || getMultiUserStatus(meetingId, whiteboardId);

  if (!allowed) {
    throw new Meteor.Error('not-allowed', `User ${requesterUserId} is not allowed to undo the annotation`);
  }

  const payload = {
    whiteboardId,
  };

  return RedisPubSub.publishUserMessage(CHANNEL, EVENT_NAME, meetingId, requesterUserId, payload);
}