-export const getDataExplorer = (state: DataExplorerState, id: string) =>
- state[id] || initialDataExplorer;
-
-const update = (state: DataExplorerState, id: string, updateFn: (dataExplorer: DataExplorer) => DataExplorer) =>
- ({ ...state, [id]: updateFn(getDataExplorer(state, id)) });
-
-const canUpdateColumns = (prevColumns: DataColumns<any>, nextColumns: DataColumns<any>) => {
+export const getSortColumn = <R>(dataExplorer: DataExplorer): DataColumn<any, R> | undefined =>
+ dataExplorer.columns.find(
+ (c: DataColumn<any, R>) => !!c.sort && c.sort.direction !== SortDirection.NONE
+ );
+
+const update = (
+ state: DataExplorerState,
+ id: string,
+ updateFn: (dataExplorer: DataExplorer) => DataExplorer
+) => ({ ...state, [id]: updateFn(getDataExplorer(state, id)) });
+
+const canUpdateColumns = (
+ prevColumns: DataColumns<any, any>,
+ nextColumns: DataColumns<any, any>
+) => {