mirror of
https://github.com/langgenius/dify.git
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524 lines
14 KiB
TypeScript
524 lines
14 KiB
TypeScript
import { useCallback, useRef } from 'react'
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import produce from 'immer'
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import type {
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NodeDragHandler,
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NodeMouseHandler,
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OnConnect,
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} from 'reactflow'
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import {
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Position,
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getConnectedEdges,
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getIncomers,
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getOutgoers,
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useStoreApi,
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} from 'reactflow'
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import type { ToolDefaultValue } from '../block-selector/types'
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import type {
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Node,
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} from '../types'
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import { BlockEnum } from '../types'
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import { useStore } from '../store'
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import {
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NODE_WIDTH_X_OFFSET,
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Y_OFFSET,
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} from '../constants'
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import { useNodesInitialData } from './use-nodes-data'
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import { useNodesSyncDraft } from './use-nodes-sync-draft'
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export const useNodesInteractions = () => {
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const store = useStoreApi()
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const nodesInitialData = useNodesInitialData()
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const { handleSyncWorkflowDraft } = useNodesSyncDraft()
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const dragNodeStartPosition = useRef({ x: 0, y: 0 } as { x: number; y: number })
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const handleNodeDragStart = useCallback<NodeDragHandler>((_, node) => {
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const {
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runningStatus,
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} = useStore.getState()
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if (runningStatus)
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return
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dragNodeStartPosition.current = { x: node.position.x, y: node.position.y }
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}, [])
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const handleNodeDrag = useCallback<NodeDragHandler>((e, node: Node) => {
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const { runningStatus } = useStore.getState()
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if (runningStatus)
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return
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const {
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getNodes,
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setNodes,
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} = store.getState()
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const {
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setHelpLineHorizontal,
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setHelpLineVertical,
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} = useStore.getState()
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e.stopPropagation()
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const nodes = getNodes()
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const showHorizontalHelpLineNodes = nodes.filter((n) => {
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if (n.id === node.id)
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return false
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const nY = Math.ceil(n.position.y)
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const nodeY = Math.ceil(node.position.y)
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if (nY - nodeY < 5 && nY - nodeY > -5)
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return true
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return false
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}).sort((a, b) => a.position.x - b.position.x)
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const showHorizontalHelpLineNodesLength = showHorizontalHelpLineNodes.length
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if (showHorizontalHelpLineNodesLength > 0) {
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const first = showHorizontalHelpLineNodes[0]
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const last = showHorizontalHelpLineNodes[showHorizontalHelpLineNodesLength - 1]
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const helpLine = {
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top: first.position.y,
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left: first.position.x,
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width: last.position.x + last.width! - first.position.x,
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}
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if (node.position.x < first.position.x) {
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helpLine.left = node.position.x
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helpLine.width = first.position.x + first.width! - node.position.x
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}
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if (node.position.x > last.position.x)
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helpLine.width = node.position.x + node.width! - first.position.x
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setHelpLineHorizontal(helpLine)
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}
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else {
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setHelpLineHorizontal()
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}
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const showVerticalHelpLineNodes = nodes.filter((n) => {
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if (n.id === node.id)
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return false
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const nX = Math.ceil(n.position.x)
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const nodeX = Math.ceil(node.position.x)
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if (nX - nodeX < 5 && nX - nodeX > -5)
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return true
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return false
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}).sort((a, b) => a.position.x - b.position.x)
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const showVerticalHelpLineNodesLength = showVerticalHelpLineNodes.length
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if (showVerticalHelpLineNodesLength > 0) {
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const first = showVerticalHelpLineNodes[0]
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const last = showVerticalHelpLineNodes[showVerticalHelpLineNodesLength - 1]
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const helpLine = {
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top: first.position.y,
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left: first.position.x,
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height: last.position.y + last.height! - first.position.y,
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}
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if (node.position.y < first.position.y) {
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helpLine.top = node.position.y
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helpLine.height = first.position.y + first.height! - node.position.y
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}
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if (node.position.y > last.position.y)
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helpLine.height = node.position.y + node.height! - first.position.y
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setHelpLineVertical(helpLine)
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}
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else {
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setHelpLineVertical()
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}
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const newNodes = produce(nodes, (draft) => {
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const currentNode = draft.find(n => n.id === node.id)!
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currentNode.position = {
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x: showVerticalHelpLineNodesLength > 0 ? showVerticalHelpLineNodes[0].position.x : node.position.x,
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y: showHorizontalHelpLineNodesLength > 0 ? showHorizontalHelpLineNodes[0].position.y : node.position.y,
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}
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})
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setNodes(newNodes)
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}, [store])
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const handleNodeDragStop = useCallback<NodeDragHandler>((_, node) => {
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const {
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runningStatus,
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setHelpLineHorizontal,
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setHelpLineVertical,
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} = useStore.getState()
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if (runningStatus)
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return
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const { x, y } = dragNodeStartPosition.current
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if (!(x === node.position.x && y === node.position.y)) {
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setHelpLineHorizontal()
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setHelpLineVertical()
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handleSyncWorkflowDraft()
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}
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}, [handleSyncWorkflowDraft])
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const handleNodeEnter = useCallback<NodeMouseHandler>((_, node) => {
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const { runningStatus } = useStore.getState()
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if (runningStatus)
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return
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const {
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edges,
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setEdges,
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} = store.getState()
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const newEdges = produce(edges, (draft) => {
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const connectedEdges = getConnectedEdges([node], edges)
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connectedEdges.forEach((edge) => {
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const currentEdge = draft.find(e => e.id === edge.id)
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if (currentEdge)
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currentEdge.data = { ...currentEdge.data, _connectedNodeIsHovering: true }
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})
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})
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setEdges(newEdges)
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}, [store])
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const handleNodeLeave = useCallback<NodeMouseHandler>(() => {
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const { runningStatus } = useStore.getState()
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if (runningStatus)
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return
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const {
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edges,
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setEdges,
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} = store.getState()
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const newEdges = produce(edges, (draft) => {
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draft.forEach((edge) => {
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edge.data = { ...edge.data, _connectedNodeIsHovering: false }
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})
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})
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setEdges(newEdges)
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}, [store])
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const handleNodeSelect = useCallback((nodeId: string, cancelSelection?: boolean) => {
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const { runningStatus } = useStore.getState()
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if (runningStatus)
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return
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const {
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getNodes,
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setNodes,
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} = store.getState()
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const nodes = getNodes()
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const selectedNode = nodes.find(node => node.data.selected)
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if (!cancelSelection && selectedNode?.id === nodeId)
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return
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const newNodes = produce(nodes, (draft) => {
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draft.forEach((node) => {
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if (node.id === nodeId)
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node.data.selected = !cancelSelection
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else
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node.data.selected = false
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})
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})
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setNodes(newNodes)
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handleSyncWorkflowDraft()
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}, [store, handleSyncWorkflowDraft])
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const handleNodeClick = useCallback<NodeMouseHandler>((_, node) => {
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const {
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runningStatus,
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} = useStore.getState()
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if (runningStatus)
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return
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handleNodeSelect(node.id)
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}, [handleNodeSelect])
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const handleNodeConnect = useCallback<OnConnect>(({
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source,
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sourceHandle,
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target,
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targetHandle,
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}) => {
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const { runningStatus } = useStore.getState()
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if (runningStatus)
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return
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const {
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edges,
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setEdges,
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} = store.getState()
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const newEdges = produce(edges, (draft) => {
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const filtered = draft.filter(edge => (edge.source !== source && edge.sourceHandle !== sourceHandle) || (edge.target !== target && edge.targetHandle !== targetHandle))
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filtered.push({
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id: `${source}-${target}`,
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type: 'custom',
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source: source!,
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target: target!,
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sourceHandle,
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targetHandle,
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})
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return filtered
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})
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setEdges(newEdges)
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handleSyncWorkflowDraft()
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}, [store, handleSyncWorkflowDraft])
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const handleNodeDelete = useCallback((nodeId: string) => {
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const { runningStatus } = useStore.getState()
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if (runningStatus)
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return
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const {
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getNodes,
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setNodes,
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edges,
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setEdges,
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} = store.getState()
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const nodes = getNodes()
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const currentNodeIndex = nodes.findIndex(node => node.id === nodeId)
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const currentNode = nodes[currentNodeIndex]
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const incomersIds = getIncomers(currentNode, nodes, edges).map(incomer => incomer.id)
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const outgoersIds = getOutgoers(currentNode, nodes, edges).map(outgoer => outgoer.id)
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const connectedEdges = getConnectedEdges([{ id: nodeId } as Node], edges)
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const sourceEdgesHandleIds = connectedEdges.filter(edge => edge.target === nodeId).map(edge => edge.sourceHandle)
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const targetEdgesHandleIds = connectedEdges.filter(edge => edge.source === nodeId).map(edge => edge.targetHandle)
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const newNodes = produce(nodes, (draft: Node[]) => {
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draft.forEach((node) => {
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if (incomersIds.includes(node.id))
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node.data._connectedSourceHandleIds = node.data._connectedSourceHandleIds?.filter(handleId => !sourceEdgesHandleIds.includes(handleId))
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if (outgoersIds.includes(node.id))
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node.data._connectedTargetHandleIds = node.data._connectedTargetHandleIds?.filter(handleId => !targetEdgesHandleIds.includes(handleId))
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})
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draft.splice(currentNodeIndex, 1)
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})
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setNodes(newNodes)
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const newEdges = produce(edges, (draft) => {
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return draft.filter(edge => !connectedEdges.find(connectedEdge => connectedEdge.id === edge.id))
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})
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setEdges(newEdges)
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handleSyncWorkflowDraft()
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}, [store, handleSyncWorkflowDraft])
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const handleNodeAddNext = useCallback((
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currentNodeId: string,
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nodeType: BlockEnum,
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sourceHandle: string,
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toolDefaultValue?: ToolDefaultValue,
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) => {
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const { runningStatus } = useStore.getState()
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if (runningStatus)
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return
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const {
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getNodes,
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setNodes,
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edges,
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setEdges,
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} = store.getState()
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const nodes = getNodes()
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const currentNodeIndex = nodes.findIndex(node => node.id === currentNodeId)
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const currentNode = nodes[currentNodeIndex]
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const outgoers = getOutgoers(currentNode, nodes, edges).sort((a, b) => a.position.y - b.position.y)
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const lastOutgoer = outgoers[outgoers.length - 1]
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const nextNode: Node = {
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id: `${Date.now()}`,
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type: 'custom',
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data: {
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...nodesInitialData[nodeType],
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...(toolDefaultValue || {}),
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_connectedTargetHandleIds: ['target'],
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selected: true,
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},
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position: {
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x: lastOutgoer ? lastOutgoer.position.x : currentNode.position.x + NODE_WIDTH_X_OFFSET,
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y: lastOutgoer ? lastOutgoer.position.y + lastOutgoer.height! + Y_OFFSET : currentNode.position.y,
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},
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targetPosition: Position.Left,
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}
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const newEdge = {
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id: `${currentNode.id}-${nextNode.id}`,
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type: 'custom',
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source: currentNode.id,
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sourceHandle,
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target: nextNode.id,
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targetHandle: 'target',
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}
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const newNodes = produce(nodes, (draft: Node[]) => {
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draft.forEach((node, index) => {
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node.data.selected = false
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if (index === currentNodeIndex)
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node.data._connectedSourceHandleIds?.push(sourceHandle)
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})
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draft.push(nextNode)
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})
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setNodes(newNodes)
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const newEdges = produce(edges, (draft) => {
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draft.push(newEdge)
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})
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setEdges(newEdges)
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handleSyncWorkflowDraft()
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}, [store, nodesInitialData, handleSyncWorkflowDraft])
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const handleNodeAddPrev = useCallback((
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currentNodeId: string,
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nodeType: BlockEnum,
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targetHandle: string,
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toolDefaultValue?: ToolDefaultValue,
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) => {
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const { runningStatus } = useStore.getState()
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if (runningStatus)
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return
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const {
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getNodes,
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setNodes,
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edges,
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setEdges,
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} = store.getState()
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const nodes = getNodes()
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const currentNodeIndex = nodes.findIndex(node => node.id === currentNodeId)
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const currentNode = nodes[currentNodeIndex]
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const prevNode: Node = {
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id: `${Date.now()}`,
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type: 'custom',
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data: {
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...nodesInitialData[nodeType],
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...(toolDefaultValue || {}),
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selected: true,
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},
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position: {
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x: currentNode.position.x,
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y: currentNode.position.y,
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},
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targetPosition: Position.Left,
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}
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const newNodes = produce(nodes, (draft) => {
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draft.forEach((node, index) => {
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node.data.selected = false
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if (index === currentNodeIndex)
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node.position.x += NODE_WIDTH_X_OFFSET
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})
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draft.push(prevNode)
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})
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setNodes(newNodes)
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if (prevNode.type !== BlockEnum.IfElse && prevNode.type !== BlockEnum.QuestionClassifier) {
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const newEdge = {
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id: `${prevNode.id}-${currentNode.id}`,
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type: 'custom',
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source: prevNode.id,
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sourceHandle: 'source',
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target: currentNode.id,
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targetHandle,
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}
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const newEdges = produce(edges, (draft) => {
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draft.push(newEdge)
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})
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setEdges(newEdges)
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}
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handleSyncWorkflowDraft()
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}, [store, nodesInitialData, handleSyncWorkflowDraft])
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const handleNodeChange = useCallback((
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currentNodeId: string,
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nodeType: BlockEnum,
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sourceHandle: string,
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toolDefaultValue?: ToolDefaultValue,
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) => {
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const { runningStatus } = useStore.getState()
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if (runningStatus)
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return
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const {
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getNodes,
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setNodes,
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edges,
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setEdges,
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} = store.getState()
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const nodes = getNodes()
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const currentNode = nodes.find(node => node.id === currentNodeId)!
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const incomers = getIncomers(currentNode, nodes, edges)
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const connectedEdges = getConnectedEdges([currentNode], edges)
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const newCurrentNode: Node = {
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id: `${Date.now()}`,
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type: 'custom',
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data: {
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...nodesInitialData[nodeType],
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...(toolDefaultValue || {}),
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selected: currentNode.data.selected,
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},
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position: {
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x: currentNode.position.x,
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y: currentNode.position.y,
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},
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targetPosition: Position.Left,
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}
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const newNodes = produce(nodes, (draft) => {
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const index = draft.findIndex(node => node.id === currentNodeId)
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draft.splice(index, 1, newCurrentNode)
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})
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setNodes(newNodes)
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if (incomers.length === 1) {
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const parentNodeId = incomers[0].id
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const newEdge = {
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id: `${parentNodeId}-${newCurrentNode.id}`,
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type: 'custom',
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source: parentNodeId,
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sourceHandle,
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target: newCurrentNode.id,
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targetHandle: 'target',
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}
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const newEdges = produce(edges, (draft) => {
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const filtered = draft.filter(edge => !connectedEdges.find(connectedEdge => connectedEdge.id === edge.id))
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filtered.push(newEdge)
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return filtered
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})
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setEdges(newEdges)
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handleSyncWorkflowDraft()
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}
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}, [store, nodesInitialData, handleSyncWorkflowDraft])
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return {
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handleNodeDragStart,
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handleNodeDrag,
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handleNodeDragStop,
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handleNodeEnter,
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handleNodeLeave,
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handleNodeSelect,
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handleNodeClick,
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handleNodeConnect,
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handleNodeDelete,
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handleNodeAddNext,
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handleNodeAddPrev,
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handleNodeChange,
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}
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}
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