Feat: Fixed the issue where the prompt always displayed the initial value when switching between different generate operators #4764 (#4808)

### What problem does this PR solve?

Feat: Fixed the issue where the prompt always displayed the initial
value when switching between different generate operators #4764

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/components/prompt-editor/constant.ts

@@ -0,0 +1 @@
+export const ProgrammaticTag = 'programmatic';

web/src/components/prompt-editor/index.tsx

@@ -1,13 +1,10 @@
 import { CodeHighlightNode, CodeNode } from '@lexical/code';
-import { AutoFocusPlugin } from '@lexical/react/LexicalAutoFocusPlugin';
 import {
   InitialConfigType,
   LexicalComposer,
 } from '@lexical/react/LexicalComposer';
 import { ContentEditable } from '@lexical/react/LexicalContentEditable';
 import { LexicalErrorBoundary } from '@lexical/react/LexicalErrorBoundary';
-import { HistoryPlugin } from '@lexical/react/LexicalHistoryPlugin';
-import { OnChangePlugin } from '@lexical/react/LexicalOnChangePlugin';
 import { RichTextPlugin } from '@lexical/react/LexicalRichTextPlugin';
 import { HeadingNode, QuoteNode } from '@lexical/rich-text';
 import {
@@ -18,9 +15,11 @@ import {
   LexicalNode,
 } from 'lexical';
 
+import { useCallback } from 'react';
 import { useTranslation } from 'react-i18next';
 import theme from './theme';
 import { VariableNode } from './variable-node';
+import { VariableOnChangePlugin } from './variable-on-change-plugin';
 import VariablePickerMenuPlugin from './variable-picker-plugin';
 
 // Catch any errors that occur during Lexical updates and log them
@@ -52,16 +51,20 @@ export function PromptEditor({ value, onChange }: IProps) {
     nodes: Nodes,
   };
 
-  function onValueChange(editorState: EditorState) {
-    editorState?.read(() => {
-      const listNodes = $nodesOfType(VariableNode); // to be removed
-      // const allNodes = $dfs();
-      console.log('🚀 ~ onChange ~ allNodes:', listNodes);
+  const onValueChange = useCallback(
+    (editorState: EditorState) => {
+      editorState?.read(() => {
+        const listNodes = $nodesOfType(VariableNode); // to be removed
+        // const allNodes = $dfs();
+        console.log('🚀 ~ onChange ~ allNodes:', listNodes);
 
-      const text = $getRoot().getTextContent();
-      onChange?.(text);
-    });
-  }
+        const text = $getRoot().getTextContent();
+
+        onChange?.(text);
+      });
+    },
+    [onChange],
+  );
 
   return (
     <LexicalComposer initialConfig={initialConfig}>
@@ -74,10 +77,8 @@ export function PromptEditor({ value, onChange }: IProps) {
         }
         ErrorBoundary={LexicalErrorBoundary}
       />
-      <HistoryPlugin />
-      <AutoFocusPlugin />
       <VariablePickerMenuPlugin value={value}></VariablePickerMenuPlugin>
-      <OnChangePlugin onChange={onValueChange}></OnChangePlugin>
+      <VariableOnChangePlugin onChange={onValueChange}></VariableOnChangePlugin>
     </LexicalComposer>
   );
 }

web/src/components/prompt-editor/variable-on-change-plugin.tsx

@@ -0,0 +1,35 @@
+import { useLexicalComposerContext } from '@lexical/react/LexicalComposerContext';
+import { EditorState, LexicalEditor } from 'lexical';
+import { useEffect } from 'react';
+import { ProgrammaticTag } from './constant';
+
+interface IProps {
+  onChange: (
+    editorState: EditorState,
+    editor?: LexicalEditor,
+    tags?: Set<string>,
+  ) => void;
+}
+
+export function VariableOnChangePlugin({ onChange }: IProps) {
+  // Access the editor through the LexicalComposerContext
+  const [editor] = useLexicalComposerContext();
+  // Wrap our listener in useEffect to handle the teardown and avoid stale references.
+  useEffect(() => {
+    // most listeners return a teardown function that can be called to clean them up.
+    return editor.registerUpdateListener(
+      ({ editorState, tags, dirtyElements }) => {
+        // Check if there is a "programmatic" tag
+        const isProgrammaticUpdate = tags.has(ProgrammaticTag);
+
+        // The onchange event is only triggered when the data is manually updated
+        // Otherwise, the content will be displayed incorrectly.
+        if (dirtyElements.size > 0 && !isProgrammaticUpdate) {
+          onChange(editorState);
+        }
+      },
+    );
+  }, [editor, onChange]);
+
+  return null;
+}

web/src/components/prompt-editor/variable-picker-plugin.tsx

@@ -33,6 +33,7 @@ import { FlowFormContext } from '@/pages/flow/context';
 import { useBuildComponentIdSelectOptions } from '@/pages/flow/hooks/use-get-begin-query';
 import { $createVariableNode } from './variable-node';
 
+import { ProgrammaticTag } from './constant';
 import './index.css';
 class VariableInnerOption extends MenuOption {
   label: string;
@@ -215,9 +216,12 @@ export default function VariablePickerMenuPlugin({
   useEffect(() => {
     if (editor && value && isFirstRender.current) {
       isFirstRender.current = false;
-      editor.update(() => {
-        parseTextToVariableNodes(value);
-      });
+      editor.update(
+        () => {
+          parseTextToVariableNodes(value);
+        },
+        { tag: ProgrammaticTag },
+      );
     }
   }, [parseTextToVariableNodes, editor, value]);
 

web/src/hooks/flow-hooks.ts

@@ -3,6 +3,7 @@ import { DSL, IFlow, IFlowTemplate } from '@/interfaces/database/flow';
 import { IDebugSingleRequestBody } from '@/interfaces/request/flow';
 import i18n from '@/locales/config';
 import { useGetSharedChatSearchParams } from '@/pages/chat/shared-hooks';
+import { BeginId } from '@/pages/flow/constant';
 import flowService from '@/services/flow-service';
 import { buildMessageListWithUuid } from '@/utils/chat';
 import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
@@ -16,7 +17,7 @@ export const EmptyDsl = {
   graph: {
     nodes: [
       {
-        id: 'begin',
+        id: BeginId,
         type: 'beginNode',
         position: {
           x: 50,

web/src/pages/flow/form/generate-form/index.tsx

@@ -35,6 +35,7 @@ const GenerateForm = ({ onValuesChange, form }: IOperatorForm) => {
           },
         ]}
       >
+        {/* <Input.TextArea rows={8}></Input.TextArea> */}
         <PromptEditor></PromptEditor>
       </Form.Item>
       <Form.Item

web/src/pages/flow/hooks/use-save-graph.ts

@@ -73,7 +73,7 @@ export const useWatchAgentChange = (chatDrawerVisible: boolean) => {
 
   useDebounceEffect(
     () => {
-      saveAgent();
+      // saveAgent();
     },
     [nodes, edges],
     {