refactor: rundown id context

apps/client/src/common/context/RundownSelectionContext.tsx

@@ -0,0 +1,72 @@
+import { Maybe, ProjectRundown } from 'ontime-types';
+import {
+  PropsWithChildren,
+  createContext,
+  startTransition,
+  useCallback,
+  useContext,
+  useEffect,
+  useMemo,
+  useState,
+} from 'react';
+
+import { useProjectRundowns } from '../hooks-query/useProjectRundowns';
+
+export type RundownScopeValue = {
+  loadedRundownId: string;
+  selectedRundownId: Maybe<string>;
+  isLoadedRundown: boolean;
+  effectiveRundownId: string;
+  selectRundownId: (val: Maybe<string>) => void;
+  rundowns: ProjectRundown[];
+};
+
+const RundownScopeContext = createContext<RundownScopeValue | null>(null);
+
+export function RundownSelectionContextProvider({ children }: PropsWithChildren) {
+  'use memo';
+  const { data } = useProjectRundowns();
+  const { loaded, rundowns } = data;
+  const [selectedRundownId, setSelectedRundownId] = useState<Maybe<string>>(null);
+
+  const selectRundownId = useCallback(
+    (rundownId: Maybe<string>) => {
+      startTransition(() => {
+        if (rundowns.find((entry) => entry.id === rundownId)) setSelectedRundownId(rundownId);
+        else setSelectedRundownId(null);
+      });
+    },
+    [rundowns],
+  );
+
+  const effectiveRundownId = selectedRundownId ? selectedRundownId : loaded;
+  const isLoadedRundown = effectiveRundownId === loaded;
+
+  useEffect(() => {
+    if (!rundowns.find((entry) => entry.id === effectiveRundownId)) setSelectedRundownId(null);
+  }, [rundowns, effectiveRundownId]);
+
+  const value = useMemo(
+    (): RundownScopeValue => ({
+      loadedRundownId: loaded,
+      isLoadedRundown,
+      selectedRundownId,
+      effectiveRundownId,
+      selectRundownId,
+      rundowns,
+    }),
+    [loaded, isLoadedRundown, selectedRundownId, effectiveRundownId, selectRundownId, rundowns],
+  );
+
+  return <RundownScopeContext.Provider value={value}>{children}</RundownScopeContext.Provider>;
+}
+
+export function useRundownSelectionContext() {
+  const context = useContext(RundownScopeContext);
+
+  if (!context) {
+    throw new Error('useRundownScopeSelection requires a RundownSelectionContextProvider');
+  }
+
+  return context;
+}