Function handleChangesetRequest

src/node/handler/PadMessageHandler.ts:1530–1545

(socket:any, {data: {granularity, start, requestID}}: ChangesetRequest)

 * Handles a request for a rough changeset, the timeslider client needs it
 */
const handleChangesetRequest = async (socket:any, {data: {granularity, start, requestID}}: ChangesetRequest) => {
  if (granularity == null) throw new Error('missing granularity');
  if (!Number.isInteger(granularity)) throw new Error('granularity is not an integer');
  if (start == null) throw new Error('missing start');
  start = checkValidRev(start);
  if (requestID == null) throw new Error('mising requestID');
  const end = start + (100 * granularity);
  const {padId, author: authorId} = sessioninfos[socket.id];
  const pad = await padManager.getPad(padId, null, authorId);
  const headRev = pad.getHeadRevisionNumber();
  if (start > headRev)
    start = headRev;
  const data:MapArrayType<any> = await getChangesetInfo(pad, start, end, granularity);
  data.requestID = requestID;
  socket.emit('message', {type: 'CHANGESET_REQ', data});
};

/**
 * Tries to rebuild the getChangestInfo function of the original Etherpad