Testing the status of a room while selecting a timerange

If you store the resource status in dp.resource[].tags object you will be able to access it like this:

dp.resources = [
  { name: "Resource 1", id: 1, tags : {disabled: true } }
];

// ...
dp.onTimeRangeSelecting = function(args) {
  var row = dp.rows.find(args.resource);
  var disabled = row.tags && row.tags.disabled;
  if (disabled) {
    args.allowed = false;
  }
};