Resolve Alex cherry-pick

bigbluebutton-html5/imports/api/2.0/annotation/server/eventHandlers.js

@@ -2,7 +2,9 @@ import RedisPubSub from '/imports/startup/server/redis2x';
 import handleWhiteboardCleared from './handlers/whiteboardCleared';
 import handleWhiteboardUndo from './handlers/whiteboardUndo';
 import handleWhiteboardSend from './handlers/whiteboardSend';
+import handleWhiteboardAnnotations from './handlers/whiteboardAnnotations';
 
 RedisPubSub.on('ClearWhiteboardEvtMsg', handleWhiteboardCleared);
 RedisPubSub.on('UndoWhiteboardEvtMsg', handleWhiteboardUndo);
 RedisPubSub.on('SendWhiteboardAnnotationEvtMsg', handleWhiteboardSend);
+RedisPubSub.on('GetWhiteboardAnnotationsRespMsg', handleWhiteboardAnnotations);

bigbluebutton-html5/imports/api/2.0/annotation/server/handlers/whiteboardAnnotations.js

@@ -0,0 +1,30 @@
+import _ from 'lodash';
+import { check } from 'meteor/check';
+import Annotations from '/imports/api/2.0/annotations';
+import addAnnotation from '../modifiers/addAnnotation';
+import removeAnnotation from '../modifiers/removeAnnotation';
+
+export default function handleWhiteboardAnnotations({ body }, meetingId) {
+  check(meetingId, String);
+  check(body, Object);
+
+  const { annotations, whiteboardId } = body;
+  const annotationIds = annotations.map(annotation => annotation.id);
+  const annotationsToRemove = Annotations.find({
+    meetingId,
+    wbId: whiteboardId,
+    'annotationInfo.id': { $nin: annotationIds },
+  }).fetch();
+
+  _.each(annotationsToRemove, (annotation) => {
+    removeAnnotation(meetingId, annotation.whiteboardId, annotation.annotationInfo.id);
+  });
+
+  const annotationsAdded = [];
+  _.each(annotations, (annotation) => {
+    const { wbId, userId } = annotation;
+    annotationsAdded.push(addAnnotation(meetingId, wbId, userId, annotation));
+  });
+
+  return annotationsAdded;
+}