init

src/features/routines/provider.tsx

@@ -0,0 +1,74 @@
+import { useAsync, useAsyncCallback } from "#/hooks/async";
+import AsyncStorage from "@react-native-async-storage/async-storage";
+import React, { ReactNode, useMemo, useState } from "react";
+import { Routine, RoutinesContext } from "./context";
+
+type RoutinesProviderProps = {
+  children: ReactNode;
+}
+
+const ROUTINES_STORAGE_KEY = 'routines-items';
+
+const RoutinesProvider: React.FC<RoutinesProviderProps> = ({ children }) => {
+  const [routineIndex, setRoutineIndex] = useState<{[id: string]: Routine}>({});
+  const routines = useMemo(
+    () => Object.values(routineIndex),
+    [routineIndex]
+  );
+
+  useAsync(
+    async () => {
+      const raw = await AsyncStorage.getItem(ROUTINES_STORAGE_KEY);
+      if (!raw) {
+        return;
+      }
+      const result = JSON.parse(raw) as {[name: string]: Routine};
+      Object.values(result).forEach(item => {
+        item.start.max = new Date(item.start.max);
+        item.start.min = new Date(item.start.min);
+      });
+      
+      setRoutineIndex(result);
+    },
+    [setRoutineIndex],
+  );
+
+  const [set] = useAsyncCallback(
+    async (routine: Routine) => {
+      const index = {
+        ...routineIndex,
+        [routine.id]: routine,
+      };
+      setRoutineIndex(index);
+      await AsyncStorage.setItem(ROUTINES_STORAGE_KEY, JSON.stringify(index));
+    },
+    [setRoutineIndex, routineIndex],
+  );
+
+  const [remove] = useAsyncCallback(
+    async (id: string) => {
+      const index = {
+        ...routineIndex,
+      };
+      delete index[id];
+      setRoutineIndex(index);
+      await AsyncStorage.setItem(ROUTINES_STORAGE_KEY, JSON.stringify(index));
+    },
+    [setRoutineIndex, routineIndex],
+  );
+
+  return (
+    <RoutinesContext.Provider
+      value={{
+        routines,
+        set,
+        remove,
+      }}
+    >
+      {children}
+    </RoutinesContext.Provider>
+  )
+}
+
+export type { RoutinesProviderProps };
+export { RoutinesProvider };