refactor: rundown (#597)

* refactor: add revision number to rundown

* chore: migrate query

apps/client/src/common/hooks-query/useRundown.ts

@@ -1,19 +1,29 @@
 import { useQuery } from '@tanstack/react-query';
+import { GetRundownCached } from 'ontime-types';
 
 import { queryRefetchInterval } from '../../ontimeConfig';
-import { RUNDOWN_TABLE } from '../api/apiConstants';
-import { fetchRundown } from '../api/eventsApi';
+import { RUNDOWN } from '../api/apiConstants';
+import { fetchCachedRundown } from '../api/eventsApi';
 
+const cachedRundownPlaceholder = { rundown: [], revision: -1 };
+
+// TODO: can we leverage structural sharing to see if data has changed?
 export default function useRundown() {
-  const { data, status, isError, refetch } = useQuery({
-    queryKey: RUNDOWN_TABLE,
-    queryFn: fetchRundown,
-    placeholderData: [],
+  return useQuery<GetRundownCached>({
+    queryKey: RUNDOWN,
+    queryFn: fetchCachedRundown,
+    placeholderData: cachedRundownPlaceholder,
     retry: 5,
+    select: (data) => data.rundown,
     retryDelay: (attempt) => attempt * 2500,
     refetchInterval: queryRefetchInterval,
     networkMode: 'always',
+    // structuralSharing: (oldData: GetRundownCached | undefined, newData: GetRundownCached) => {
+    //   if (oldData === undefined) {
+    //     cachedRundownPlaceholder;
+    //   }
+    //   const hasDataChanged = oldData?.revision === newData.revision;
+    //   return hasDataChanged ? oldData : newData;
+    // },
   });
-
-  return { data, status, isError, refetch };
 }