fix empty page evaluation

apps/app/src/client/services/page-operation.ts

@@ -1,6 +1,6 @@
 import { useCallback } from 'react';
 
-import { SubscriptionStatusType, Nullable } from '@growi/core';
+import { SubscriptionStatusType, type Nullable } from '@growi/core';
 import urljoin from 'url-join';
 
 import { OptionsToSave } from '~/interfaces/page-operation';
@@ -153,10 +153,8 @@ export const useSaveOrUpdate = (): SaveOrUpdateFunction => {
     // markdown = pageEditor.getMarkdown();
     // }
 
-    const isNoRevisionPage = pageId != null && revisionId == null;
-
     let res;
-    if (pageId == null || isNoRevisionPage) {
+    if (pageId == null || revisionId == null) {
       res = await createPage(path, markdown, options);
     }
     else {

apps/app/src/components/SavePageControls.tsx

@@ -14,7 +14,7 @@ import {
   useIsEditable, useIsAclEnabled,
 } from '~/stores/context';
 import { useWaitingSaveProcessing } from '~/stores/editor';
-import { useCurrentPagePath, useCurrentPageId } from '~/stores/page';
+import { useSWRxCurrentPage } from '~/stores/page';
 import { useSelectedGrant } from '~/stores/ui';
 import loggerFactory from '~/utils/logger';
 
@@ -38,11 +38,10 @@ export type SavePageControlsProps = {
 export const SavePageControls = (props: SavePageControlsProps): JSX.Element | null => {
   const { slackChannels } = props;
   const { t } = useTranslation();
-  const { data: currentPagePath } = useCurrentPagePath();
+  const { data: currentPage } = useSWRxCurrentPage();
   const { data: isEditable } = useIsEditable();
   const { data: isAclEnabled } = useIsAclEnabled();
   const { data: grantData, mutate: mutateGrant } = useSelectedGrant();
-  const { data: pageId } = useCurrentPageId();
   const { data: _isWaitingSaveProcessing } = useWaitingSaveProcessing();
 
   const isWaitingSaveProcessing = _isWaitingSaveProcessing === true; // ignore undefined
@@ -72,8 +71,8 @@ export const SavePageControls = (props: SavePageControlsProps): JSX.Element | nu
 
   const { grant, grantedGroup } = grantData;
 
-  const isRootPage = isTopPage(currentPagePath ?? '');
-  const labelSubmitButton = pageId == null ? t('Create') : t('Update');
+  const isRootPage = isTopPage(currentPage?.path ?? '');
+  const labelSubmitButton = (currentPage != null && !currentPage.isEmpty) ? t('Update') : t('Create');
   const labelOverwriteScopes = t('page_edit.overwrite_scopes', { operation: labelSubmitButton });
 
   return (