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import type { MouseEvent } from 'react'
import {
useCallback,
} from 'react'
import produce from 'immer'
import type {
OnSelectionChangeFunc,
} from 'reactflow'
import { useStoreApi } from 'reactflow'
import { useWorkflowStore } from '../store'
import type { Node } from '../types'
export const useSelectionInteractions = () => {
const store = useStoreApi()
const workflowStore = useWorkflowStore()
const handleSelectionStart = useCallback(() => {
const {
getNodes,
setNodes,
edges,
setEdges,
userSelectionRect,
} = store.getState()
if (!userSelectionRect?.width || !userSelectionRect?.height) {
const nodes = getNodes()
const newNodes = produce(nodes, (draft) => {
draft.forEach((node) => {
if (node.data._isBundled)
node.data._isBundled = false
})
})
setNodes(newNodes)
const newEdges = produce(edges, (draft) => {
draft.forEach((edge) => {
if (edge.data._isBundled)
edge.data._isBundled = false
})
})
setEdges(newEdges)
}
}, [store])
const handleSelectionChange = useCallback<OnSelectionChangeFunc>(({ nodes: nodesInSelection, edges: edgesInSelection }) => {
const {
getNodes,
setNodes,
edges,
setEdges,
userSelectionRect,
} = store.getState()
const nodes = getNodes()
if (!userSelectionRect?.width || !userSelectionRect?.height)
return
const newNodes = produce(nodes, (draft) => {
draft.forEach((node) => {
const nodeInSelection = nodesInSelection.find(n => n.id === node.id)
if (nodeInSelection)
node.data._isBundled = true
else
node.data._isBundled = false
})
})
setNodes(newNodes)
const newEdges = produce(edges, (draft) => {
draft.forEach((edge) => {
const edgeInSelection = edgesInSelection.find(e => e.id === edge.id)
if (edgeInSelection)
edge.data._isBundled = true
else
edge.data._isBundled = false
})
})
setEdges(newEdges)
}, [store])
const handleSelectionDrag = useCallback((_: MouseEvent, nodesWithDrag: Node[]) => {
const {
getNodes,
setNodes,
} = store.getState()
workflowStore.setState({
nodeAnimation: false,
})
const nodes = getNodes()
const newNodes = produce(nodes, (draft) => {
draft.forEach((node) => {
const dragNode = nodesWithDrag.find(n => n.id === node.id)
if (dragNode)
node.position = dragNode.position
})
})
setNodes(newNodes)
}, [store, workflowStore])
const handleSelectionCancel = useCallback(() => {
const {
getNodes,
setNodes,
edges,
setEdges,
} = store.getState()
store.setState({
userSelectionRect: null,
userSelectionActive: true,
})
const nodes = getNodes()
const newNodes = produce(nodes, (draft) => {
draft.forEach((node) => {
if (node.data._isBundled)
node.data._isBundled = false
})
})
setNodes(newNodes)
const newEdges = produce(edges, (draft) => {
draft.forEach((edge) => {
if (edge.data._isBundled)
edge.data._isBundled = false
})
})
setEdges(newEdges)
}, [store])
return {
handleSelectionStart,
handleSelectionChange,
handleSelectionDrag,
handleSelectionCancel,
}
}
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