hooks

web/app/components/workflow/hooks.ts

@@ -3,9 +3,11 @@ import produce from 'immer'
 import type {
   EdgeMouseHandler,
   NodeMouseHandler,
+  OnConnect,
 } from 'reactflow'
 import {
   getConnectedEdges,
+  getIncomers,
   useStoreApi,
 } from 'reactflow'
 import type {
@@ -88,6 +90,33 @@ export const useWorkflow = () => {
     setNodes(newNodes)
   }, [store])
 
+  const handleConnectNode = useCallback<OnConnect>(({
+    source,
+    sourceHandle,
+    target,
+    targetHandle,
+  }) => {
+    const {
+      edges,
+      setEdges,
+    } = store.getState()
+
+    const newEdges = produce(edges, (draft) => {
+      const filtered = draft.filter(edge => edge.source !== source && edge.target !== target)
+
+      filtered.push({
+        id: `${source}-${target}`,
+        source: source!,
+        target: target!,
+        sourceHandle,
+        targetHandle,
+      })
+
+      return filtered
+    })
+    setEdges(newEdges)
+  }, [store])
+
   const handleEnterEdge = useCallback<EdgeMouseHandler>((_, edge) => {
     const {
       edges,
@@ -158,6 +187,7 @@ export const useWorkflow = () => {
         x: currentNode.position.x + 304,
         y: currentNode.position.y,
       },
+      selected: true,
     }
     const newEdge = {
       id: `${currentNode.id}-${nextNode.id}`,
@@ -169,7 +199,7 @@ export const useWorkflow = () => {
     }
     const newNodes = produce(nodes, (draft) => {
       draft.forEach((node) => {
-        node.data = { ...node.data, selected: false }
+        node.selected = false
       })
       draft.push(nextNode)
     })
@@ -180,7 +210,7 @@ export const useWorkflow = () => {
     setEdges(newEdges)
   }, [store])
 
-  const handleChangeCurrentNode = useCallback((parentNodeId: string, currentNodeId: string, nodeType: BlockEnum, sourceHandle: string) => {
+  const handleChangeCurrentNode = useCallback((currentNodeId: string, nodeType: BlockEnum, sourceHandle?: string) => {
     const {
       getNodes,
       setNodes,
@@ -189,6 +219,7 @@ export const useWorkflow = () => {
     } = store.getState()
     const nodes = getNodes()
     const currentNode = nodes.find(node => node.id === currentNodeId)!
+    const incomers = getIncomers(currentNode, nodes, edges)
     const connectedEdges = getConnectedEdges([currentNode], edges)
     const newCurrentNode: Node = {
       id: `${Date.now()}`,
@@ -199,27 +230,32 @@ export const useWorkflow = () => {
         y: currentNode.position.y,
       },
     }
-    const newEdge = {
-      id: `${parentNodeId}-${newCurrentNode.id}`,
-      type: 'custom',
-      source: parentNodeId,
-      sourceHandle,
-      target: newCurrentNode.id,
-      targetHandle: 'target',
-    }
     const newNodes = produce(nodes, (draft) => {
       const index = draft.findIndex(node => node.id === currentNodeId)
 
       draft.splice(index, 1, newCurrentNode)
     })
     setNodes(newNodes)
-    const newEdges = produce(edges, (draft) => {
+    if (incomers.length === 1) {
-      const filtered = draft.filter(edge => !connectedEdges.find(connectedEdge => connectedEdge.id === edge.id))
+      const parentNodeId = incomers[0].id
-      filtered.push(newEdge)
 
-      return filtered
+      const newEdge = {
-    })
+        id: `${parentNodeId}-${newCurrentNode.id}`,
-    setEdges(newEdges)
+        type: 'custom',
+        source: parentNodeId,
+        sourceHandle: sourceHandle || 'source',
+        target: newCurrentNode.id,
+        targetHandle: 'target',
+      }
+
+      const newEdges = produce(edges, (draft) => {
+        const filtered = draft.filter(edge => !connectedEdges.find(connectedEdge => connectedEdge.id === edge.id))
+        filtered.push(newEdge)
+
+        return filtered
+      })
+      setEdges(newEdges)
+    }
   }, [store])
 
   const handleDeleteNode = useCallback((nodeId: string) => {
@@ -303,6 +339,7 @@ export const useWorkflow = () => {
     handleSelectNode,
     handleEnterEdge,
     handleLeaveEdge,
+    handleConnectNode,
     handleDeleteEdge,
     handleUpdateNodeData,
     handleAddNextNode,

web/app/components/workflow/index.tsx

@@ -41,6 +41,7 @@ const Workflow: FC<WorkflowProps> = memo(({
   const {
     handleEnterNode,
     handleLeaveNode,
+    handleConnectNode,
     handleEnterEdge,
     handleLeaveEdge,
     handleDeleteEdge,
@@ -58,6 +59,7 @@ const Workflow: FC<WorkflowProps> = memo(({
         edgeTypes={edgeTypes}
         nodes={nodes}
         edges={edges}
+        onConnect={handleConnectNode}
         onNodeMouseEnter={handleEnterNode}
         onNodeMouseLeave={handleLeaveNode}
         onEdgeMouseEnter={handleEnterEdge}

web/app/components/workflow/nodes/_base/components/next-step/index.tsx

@@ -33,9 +33,7 @@ const NextStep = ({
         {
           !branches && !!outgoers.length && (
             <Item
-              parentNodeId={selectedNode!.id}
               nodeId={outgoers[0].id}
-              sourceHandle='source'
               data={outgoers[0].data}
             />
           )
@@ -63,7 +61,6 @@ const NextStep = ({
                     connected && (
                       <Item
                         data={target!.data!}
-                        parentNodeId={selectedNode!.id}
                         nodeId={target!.id}
                         sourceHandle={branch.id}
                         branchName={branch.name}

web/app/components/workflow/nodes/_base/components/next-step/item.tsx

@@ -12,14 +12,12 @@ import { useWorkflow } from '../../../../hooks'
 import Button from '@/app/components/base/button'
 
 type ItemProps = {
-  parentNodeId: string
   nodeId: string
-  sourceHandle: string
+  sourceHandle?: string
   branchName?: string
   data: CommonNodeType
 }
 const Item = ({
-  parentNodeId,
   nodeId,
   sourceHandle,
   branchName,
@@ -27,8 +25,8 @@ const Item = ({
 }: ItemProps) => {
   const { handleChangeCurrentNode } = useWorkflow()
   const handleSelect = useCallback((type: BlockEnum) => {
-    handleChangeCurrentNode(parentNodeId, nodeId, type, sourceHandle)
+    handleChangeCurrentNode(nodeId, type, sourceHandle)
-  }, [parentNodeId, nodeId, sourceHandle, handleChangeCurrentNode])
+  }, [nodeId, sourceHandle, handleChangeCurrentNode])
   const renderTrigger = useCallback((open: boolean) => {
     return (
       <Button

web/app/components/workflow/nodes/_base/components/panel-operator/change-block.tsx

@@ -0,0 +1,42 @@
+import {
+  memo,
+  useCallback,
+} from 'react'
+import BlockSelector from '../../../../block-selector'
+import { useWorkflow } from '../../../../hooks'
+import type { BlockEnum } from '../../../../types'
+
+type ChangeBlockProps = {
+  nodeId: string
+}
+const ChangeBlock = ({
+  nodeId,
+}: ChangeBlockProps) => {
+  const { handleChangeCurrentNode } = useWorkflow()
+
+  const handleSelect = useCallback((type: BlockEnum) => {
+    handleChangeCurrentNode(nodeId, type)
+  }, [handleChangeCurrentNode, nodeId])
+
+  const renderTrigger = useCallback(() => {
+    return (
+      <div className='flex items-center px-3 w-[232px] h-8 text-sm text-gray-700 rounded-lg cursor-pointer hover:bg-gray-50'>
+        Change Block
+      </div>
+    )
+  }, [])
+
+  return (
+    <BlockSelector
+      placement='bottom-end'
+      offset={{
+        mainAxis: -36,
+        crossAxis: 4,
+      }}
+      onSelect={handleSelect}
+      trigger={renderTrigger}
+    />
+  )
+}
+
+export default memo(ChangeBlock)

web/app/components/workflow/nodes/_base/components/panel-operator/index.tsx

@@ -2,7 +2,8 @@ import {
   memo,
   useState,
 } from 'react'
-import { useWorkflow } from '../../../hooks'
+import { useWorkflow } from '../../../../hooks'
+import ChangeBlock from './change-block'
 import { DotsHorizontal } from '@/app/components/base/icons/src/vender/line/general'
 import {
   PortalToFollowElem,
@@ -43,7 +44,7 @@ const PanelOperator = ({
       <PortalToFollowElemContent className='z-[11]'>
         <div className='w-[240px] border-[0.5px] border-gray-200 rounded-2xl shadow-xl bg-white'>
           <div className='p-1'>
-            <div className='flex items-center px-3 h-8 text-sm text-gray-700 rounded-lg cursor-pointer hover:bg-gray-50'>Change Block</div>
+            <ChangeBlock nodeId={nodeId} />
             <div className='flex items-center px-3 h-8 text-sm text-gray-700 rounded-lg cursor-pointer hover:bg-gray-50'>Help Link</div>
           </div>
           <div className='h-[1px] bg-gray-100'></div>