feat(ui): add loading state for builder

invokeai/frontend/web/public/locales/en.json

@@ -1004,6 +1004,7 @@
         "unknownOutput": "Unknown output: {{name}}",
         "updateNode": "Update Node",
         "updateApp": "Update App",
+        "loadingTemplates": "Loading {{name}}",
         "updateAllNodes": "Update Nodes",
         "allNodesUpdated": "All Nodes Updated",
         "unableToUpdateNodes_one": "Unable to update {{count}} node",

invokeai/frontend/web/src/features/nodes/components/sidePanel/builder/WorkflowBuilder.tsx

@@ -2,12 +2,15 @@ import { combine } from '@atlaskit/pragmatic-drag-and-drop/combine';
 import { draggable } from '@atlaskit/pragmatic-drag-and-drop/element/adapter';
 import type { SystemStyleObject } from '@invoke-ai/ui-library';
 import { Button, Flex, Spacer } from '@invoke-ai/ui-library';
+import { useStore } from '@nanostores/react';
 import { useAppSelector } from 'app/store/storeHooks';
+import { IAINoContentFallback } from 'common/components/IAIImageFallback';
 import ScrollableContent from 'common/components/OverlayScrollbars/ScrollableContent';
 import { firefoxDndFix } from 'features/dnd/util';
 import { FormElementComponent } from 'features/nodes/components/sidePanel/builder/ContainerElementComponent';
 import { buildFormElementDndData, useBuilderDndMonitor } from 'features/nodes/components/sidePanel/builder/dnd-hooks';
 import { WorkflowBuilderEditMenu } from 'features/nodes/components/sidePanel/builder/WorkflowBuilderMenu';
+import { $hasTemplates } from 'features/nodes/store/nodesSlice';
 import { selectFormRootElementId, selectIsFormEmpty } from 'features/nodes/store/workflowSlice';
 import type { FormElement } from 'features/nodes/types/workflow';
 import { buildContainer, buildDivider, buildHeading, buildText } from 'features/nodes/types/workflow';
@@ -15,6 +18,7 @@ import { startCase } from 'lodash-es';
 import type { RefObject } from 'react';
 import { memo, useEffect, useRef, useState } from 'react';
 import { useTranslation } from 'react-i18next';
+import { useGetOpenAPISchemaQuery } from 'services/api/endpoints/appInfo';
 import { assert } from 'tsafe';
 
 const sx: SystemStyleObject = {
@@ -28,8 +32,7 @@ const sx: SystemStyleObject = {
 
 export const WorkflowBuilder = memo(() => {
   const { t } = useTranslation();
-  const rootElementId = useAppSelector(selectFormRootElementId);
-  const isFormEmpty = useAppSelector(selectIsFormEmpty);
+
   useBuilderDndMonitor();
 
   return (
@@ -47,9 +50,7 @@ export const WorkflowBuilder = memo(() => {
           <WorkflowBuilderEditMenu />
         </Flex>
         <ScrollableContent>
-          <Flex sx={sx} data-is-empty={isFormEmpty}>
-            <FormElementComponent id={rootElementId} />
-          </Flex>
+          <WorkflowBuilderContent />
         </ScrollableContent>
       </Flex>
     </Flex>
@@ -57,6 +58,25 @@ export const WorkflowBuilder = memo(() => {
 });
 WorkflowBuilder.displayName = 'WorkflowBuilder';
 
+const WorkflowBuilderContent = memo(() => {
+  const { t } = useTranslation();
+  const rootElementId = useAppSelector(selectFormRootElementId);
+  const isFormEmpty = useAppSelector(selectIsFormEmpty);
+  const openApiSchemaQuery = useGetOpenAPISchemaQuery();
+  const loadedTemplates = useStore($hasTemplates);
+
+  if (openApiSchemaQuery.isLoading || !loadedTemplates) {
+    return <IAINoContentFallback label={t('nodes.loadingNodes')} icon={null} />;
+  }
+
+  return (
+    <Flex sx={sx} data-is-empty={isFormEmpty}>
+      <FormElementComponent id={rootElementId} />
+    </Flex>
+  );
+});
+WorkflowBuilderContent.displayName = 'WorkflowBuilderContent';
+
 const useAddFormElementDnd = (
   type: Exclude<FormElement['type'], 'node-field'>,
   draggableRef: RefObject<HTMLElement>

invokeai/frontend/web/src/features/nodes/components/sidePanel/viewMode/EmptyState.tsx

@@ -10,7 +10,7 @@ export const EmptyState = () => {
   const isCleanEditor = useAppSelector(selectCleanEditor);
 
   return (
-    <Flex w="full" userSelect="none" justifyContent="center">
+    <Flex w="full" h="full" userSelect="none" justifyContent="center">
       <Flex
         alignItems="center"
         justifyContent="center"

invokeai/frontend/web/src/features/nodes/components/sidePanel/viewMode/ViewModeLeftPanelContent.tsx

@@ -1,9 +1,11 @@
 import { Box, Flex } from '@invoke-ai/ui-library';
+import { useStore } from '@nanostores/react';
 import { useAppSelector } from 'app/store/storeHooks';
 import { IAINoContentFallback } from 'common/components/IAIImageFallback';
 import ScrollableContent from 'common/components/OverlayScrollbars/ScrollableContent';
 import { FormElementComponent } from 'features/nodes/components/sidePanel/builder/ContainerElementComponent';
 import { EmptyState } from 'features/nodes/components/sidePanel/viewMode/EmptyState';
+import { $hasTemplates } from 'features/nodes/store/nodesSlice';
 import { selectFormRootElementId, selectIsFormEmpty } from 'features/nodes/store/workflowSlice';
 import { t } from 'i18next';
 import { memo } from 'react';
@@ -13,9 +15,7 @@ export const ViewModeLeftPanelContent = memo(() => {
   return (
     <Box position="relative" w="full" h="full">
       <ScrollableContent>
-        <Flex flexDir="column" w="full" maxW="768px">
-          <ViewModeLeftPanelContentInner />
-        </Flex>
+        <ViewModeLeftPanelContentInner />
       </ScrollableContent>
     </Box>
   );
@@ -24,10 +24,11 @@ ViewModeLeftPanelContent.displayName = 'ViewModeLeftPanelContent';
 
 const ViewModeLeftPanelContentInner = memo(() => {
   const { isLoading } = useGetOpenAPISchemaQuery();
+  const loadedTemplates = useStore($hasTemplates);
   const rootElementId = useAppSelector(selectFormRootElementId);
   const isFormEmpty = useAppSelector(selectIsFormEmpty);
 
-  if (isLoading) {
+  if (isLoading || !loadedTemplates) {
     return <IAINoContentFallback label={t('nodes.loadingNodes')} icon={null} />;
   }
 
@@ -35,6 +36,10 @@ const ViewModeLeftPanelContentInner = memo(() => {
     return <EmptyState />;
   }
 
-  return <FormElementComponent id={rootElementId} />;
+  return (
+    <Flex flexDir="column" w="full" maxW="768px">
+      <FormElementComponent id={rootElementId} />
+    </Flex>
+  );
 });
 ViewModeLeftPanelContentInner.displayName = ' ViewModeLeftPanelContentInner';