create maintenaceMode.tsx

packages/app/src/stores/maintenanceMode.tsx

@@ -0,0 +1,31 @@
+import { withUtils, SWRResponseWithUtils } from '@growi/core/src/utils/with-utils';
+
+import { apiv3Post } from '~/client/util/apiv3-client';
+
+import { useStaticSWR } from './use-static-swr';
+
+
+type maintenanceModeUtils = {
+  start(): Promise<void>,
+  end(): Promise<void>,
+}
+
+export const useIsMaintenanceMode = (initialData?: boolean): SWRResponseWithUtils<maintenanceModeUtils, boolean> => {
+  const swrResult = useStaticSWR<boolean, Error>('isMaintenanceMode', initialData, { fallbackData: false });
+
+  const utils = {
+    start: async() => {
+      const { mutate } = swrResult;
+      await apiv3Post('/app-settings/maintenance-mode', { flag: true });
+      mutate(true);
+    },
+
+    end: async() => {
+      const { mutate } = swrResult;
+      await apiv3Post('/app-settings/maintenance-mode', { flag: false });
+      mutate(false);
+    },
+  };
+
+  return withUtils(swrResult, utils);
+};