feat(question-classifier): add drag-and-drop sorting for topics list

- Implement topic sorting functionality using react-sortablejs
- Add draggable handle and visual feedback during sorting
- Update node internals after sorting to ensure proper rendering

web/app/components/workflow/nodes/question-classifier/components/class-list.tsx

@@ -1,6 +1,6 @@
 'use client'
 import type { FC } from 'react'
-import React, { useCallback } from 'react'
+import React, { useCallback, useState } from 'react'
 import produce from 'immer'
 import { useTranslation } from 'react-i18next'
 import { useEdgesInteractions } from '../../../hooks'
@@ -8,6 +8,10 @@ import AddButton from '../../_base/components/add-button'
 import Item from './class-item'
 import type { Topic } from '@/app/components/workflow/nodes/question-classifier/types'
 import type { ValueSelector, Var } from '@/app/components/workflow/types'
+import { ReactSortable } from 'react-sortablejs'
+import { noop } from 'lodash-es'
+import { RiDraggable } from '@remixicon/react'
+import cn from '@/utils/classnames'
 
 const i18nPrefix = 'workflow.nodes.questionClassifiers'
 
@@ -17,6 +21,7 @@ type Props = {
   onChange: (list: Topic[]) => void
   readonly?: boolean
   filterVar: (payload: Var, valueSelector: ValueSelector) => boolean
+  handleSortTopic?: (newTopics: (Topic & { id: string })[]) => void
 }
 
 const ClassList: FC<Props> = ({
@@ -25,6 +30,7 @@ const ClassList: FC<Props> = ({
   onChange,
   readonly,
   filterVar,
+  handleSortTopic = noop,
 }) => {
   const { t } = useTranslation()
   const { handleEdgeDeleteByDeleteBranch } = useEdgesInteractions()
@@ -55,12 +61,34 @@ const ClassList: FC<Props> = ({
     }
   }, [list, onChange, handleEdgeDeleteByDeleteBranch, nodeId])
 
+  const [willDeleteCaseId, setWillDeleteCaseId] = useState('')
+  const topicCount = list.length
+  const handleSideWidth = 3
   // Todo Remove; edit topic name
   return (
-    <div className='space-y-2'>
+    <ReactSortable
+      list={list.map(item => ({ ...item }))}
+      setList={handleSortTopic}
+      handle='.handle'
+      ghostClass='bg-components-panel-bg'
+      animation={150}
+      disabled={readonly}
+      className='space-y-2'
+    >
       {
         list.map((item, index) => {
           return (
+            <div key={item.id}
+                className={cn(
+                  'group relative rounded-[10px] bg-components-panel-bg',
+                  willDeleteCaseId === item.id && 'bg-state-destructive-hover',
+                  `-ml-${handleSideWidth} min-h-[40px] px-0 py-0`,
+            )}>
+              <RiDraggable className={cn(
+                'handle absolute left-0 top-3 hidden h-3 w-3 cursor-pointer text-text-quaternary',
+                topicCount > 1 && 'group-hover:block',
+              )} />
+              <div className={`ml-${handleSideWidth}`}>
                 <Item
                   nodeId={nodeId}
                   key={list[index].id}
@@ -71,6 +99,8 @@ const ClassList: FC<Props> = ({
                   readonly={readonly}
                   filterVar={filterVar}
                 />
+              </div>
+            </div>
           )
         })
       }
@@ -81,7 +111,7 @@ const ClassList: FC<Props> = ({
         />
       )}
 
-    </div>
+    </ReactSortable>
   )
 }
 export default React.memo(ClassList)

web/app/components/workflow/nodes/question-classifier/panel.tsx

@@ -40,6 +40,7 @@ const Panel: FC<NodePanelProps<QuestionClassifierNodeType>> = ({
     handleVisionResolutionChange,
     handleVisionResolutionEnabledChange,
     filterVar,
+    handleSortTopic,
   } = useConfig(id, data)
 
   const model = inputs.model
@@ -99,6 +100,7 @@ const Panel: FC<NodePanelProps<QuestionClassifierNodeType>> = ({
             onChange={handleTopicsChange}
             readonly={readOnly}
             filterVar={filterVar}
+            handleSortTopic={handleSortTopic}
           />
         </Field>
         <Split />

web/app/components/workflow/nodes/question-classifier/use-config.ts

@@ -9,13 +9,15 @@ import {
 import { useStore } from '../../store'
 import useAvailableVarList from '../_base/hooks/use-available-var-list'
 import useConfigVision from '../../hooks/use-config-vision'
-import type { QuestionClassifierNodeType } from './types'
+import type { QuestionClassifierNodeType, Topic } from './types'
 import useNodeCrud from '@/app/components/workflow/nodes/_base/hooks/use-node-crud'
 import { useModelListAndDefaultModelAndCurrentProviderAndModel } from '@/app/components/header/account-setting/model-provider-page/hooks'
 import { ModelTypeEnum } from '@/app/components/header/account-setting/model-provider-page/declarations'
 import { checkHasQueryBlock } from '@/app/components/base/prompt-editor/constants'
+import { useUpdateNodeInternals } from 'reactflow'
 
 const useConfig = (id: string, payload: QuestionClassifierNodeType) => {
+  const updateNodeInternals = useUpdateNodeInternals()
   const { nodesReadOnly: readOnly } = useNodesReadOnly()
   const isChatMode = useIsChatMode()
   const defaultConfig = useStore(s => s.nodesDefaultConfigs)[payload.type]
@@ -166,6 +168,17 @@ const useConfig = (id: string, payload: QuestionClassifierNodeType) => {
     return varPayload.type === VarType.string
   }, [])
 
+  const handleSortTopic = useCallback((newTopics: (Topic & { id: string })[]) => {
+    const newInputs = produce(inputs, (draft) => {
+      draft.classes = newTopics.filter(Boolean).map(item => ({
+        id: item.id,
+        name: item.name,
+      }))
+    })
+    setInputs(newInputs)
+    updateNodeInternals(id)
+  }, [id, inputs, setInputs, updateNodeInternals])
+
   return {
     readOnly,
     inputs,
@@ -185,6 +198,7 @@ const useConfig = (id: string, payload: QuestionClassifierNodeType) => {
     isVisionModel,
     handleVisionResolutionEnabledChange,
     handleVisionResolutionChange,
+    handleSortTopic,
   }
 }