dify/web/app/components/workflow/nodes/document-extractor/use-config.ts

import type { ValueSelector, Var } from '../../types'
import type { DocExtractorNodeType } from './types'
import { produce } from 'immer'
import { useCallback, useMemo } from 'react'
import { useStoreApi } from 'reactflow'
import {
  useIsChatMode,
  useNodesReadOnly,
  useWorkflow,
  useWorkflowVariables,
} from '@/app/components/workflow/hooks'
import useNodeCrud from '@/app/components/workflow/nodes/_base/hooks/use-node-crud'
import { VarType } from '../../types'

const useConfig = (id: string, payload: DocExtractorNodeType) => {
  const { nodesReadOnly: readOnly } = useNodesReadOnly()
  const { inputs, setInputs } = useNodeCrud<DocExtractorNodeType>(id, payload)

  const filterVar = useCallback((varPayload: Var) => {
    return varPayload.type === VarType.file || varPayload.type === VarType.arrayFile
  }, [])

  const isChatMode = useIsChatMode()

  const store = useStoreApi()
  const { getBeforeNodesInSameBranch } = useWorkflow()
  const { getNodes } = store.getState()
  const currentNode = getNodes().find((n) => n.id === id)
  const isInIteration = payload.isInIteration
  const iterationNode = isInIteration
    ? getNodes().find((n) => n.id === currentNode!.parentId)
    : null
  const isInLoop = payload.isInLoop
  const loopNode = isInLoop ? getNodes().find((n) => n.id === currentNode!.parentId) : null
  const availableNodes = useMemo(() => {
    return getBeforeNodesInSameBranch(id)
  }, [getBeforeNodesInSameBranch, id])

  const { getCurrentVariableType } = useWorkflowVariables()
  const getType = useCallback(
    (variable?: ValueSelector) => {
      const varType = getCurrentVariableType({
        parentNode: isInIteration ? iterationNode : loopNode,
        valueSelector: variable || [],
        availableNodes,
        isChatMode,
        isConstant: false,
      })
      return varType
    },
    [getCurrentVariableType, isInIteration, availableNodes, isChatMode, iterationNode, loopNode],
  )

  const handleVarChanges = useCallback(
    (variable: ValueSelector | string) => {
      const newInputs = produce(inputs, (draft) => {
        draft.variable_selector = variable as ValueSelector
        draft.is_array_file = getType(draft.variable_selector) === VarType.arrayFile
      })
      setInputs(newInputs)
    },
    [getType, inputs, setInputs],
  )

  return {
    readOnly,
    inputs,
    filterVar,
    handleVarChanges,
  }
}

export default useConfig