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

import type { ErrorHandleMode, ValueSelector, Var } from '../../types'
import type { IterationNodeType } from './types'
import type { VarType as VarKindType } from '@/app/components/workflow/nodes/tool/types'
import { isEqual } from 'es-toolkit/predicate'
import { produce } from 'immer'
import { useCallback } from 'react'
import {
  useAllBuiltInTools,
  useAllCustomTools,
  useAllMCPTools,
  useAllWorkflowTools,
} from '@/service/use-tools'
import { useIsChatMode, useNodesReadOnly, useWorkflow } from '../../hooks'
import useInspectVarsCrud from '../../hooks/use-inspect-vars-crud'
import { useStore } from '../../store'
import { VarType } from '../../types'
import { toNodeOutputVars } from '../_base/components/variable/utils'
import useNodeCrud from '../_base/hooks/use-node-crud'

type SelectOption = {
  value: ErrorHandleMode
  name: string
}

const useConfig = (id: string, payload: IterationNodeType) => {
  const { deleteNodeInspectorVars } = useInspectVarsCrud()
  const { nodesReadOnly: readOnly } = useNodesReadOnly()
  const isChatMode = useIsChatMode()

  const { inputs, setInputs } = useNodeCrud<IterationNodeType>(id, payload)

  const filterInputVar = useCallback((varPayload: Var) => {
    return [
      VarType.array,
      VarType.arrayString,
      VarType.arrayBoolean,
      VarType.arrayNumber,
      VarType.arrayObject,
      VarType.arrayFile,
    ].includes(varPayload.type)
  }, [])

  const handleInputChange = useCallback(
    (input: ValueSelector | string, _varKindType: VarKindType, varInfo?: Var) => {
      const newInputs = produce(inputs, (draft) => {
        draft.iterator_selector = (input as ValueSelector) || []
        draft.iterator_input_type = varInfo?.type || VarType.arrayString
      })
      setInputs(newInputs)
    },
    [inputs, setInputs],
  )

  // output
  const { getIterationNodeChildren } = useWorkflow()
  const iterationChildrenNodes = getIterationNodeChildren(id)
  const { data: buildInTools } = useAllBuiltInTools()
  const { data: customTools } = useAllCustomTools()
  const { data: workflowTools } = useAllWorkflowTools()
  const { data: mcpTools } = useAllMCPTools()
  const dataSourceList = useStore((s) => s.dataSourceList)
  const allPluginInfoList = {
    buildInTools: buildInTools || [],
    customTools: customTools || [],
    workflowTools: workflowTools || [],
    mcpTools: mcpTools || [],
    dataSourceList: dataSourceList || [],
  }
  const childrenNodeVars = toNodeOutputVars(
    iterationChildrenNodes,
    isChatMode,
    undefined,
    [],
    [],
    [],
    allPluginInfoList,
  )

  const handleOutputVarChange = useCallback(
    (output: ValueSelector | string, _varKindType: VarKindType, varInfo?: Var) => {
      if (isEqual(inputs.output_selector, output as ValueSelector)) return

      const newInputs = produce(inputs, (draft) => {
        draft.output_selector = (output as ValueSelector) || []
        const outputItemType = varInfo?.type || VarType.string

        draft.output_type =
          (
            {
              [VarType.string]: VarType.arrayString,
              [VarType.number]: VarType.arrayNumber,
              [VarType.object]: VarType.arrayObject,
              [VarType.file]: VarType.arrayFile,
              // list operator node can output array
              [VarType.array]: VarType.array,
              [VarType.arrayFile]: VarType.arrayFile,
              [VarType.arrayString]: VarType.arrayString,
              [VarType.arrayNumber]: VarType.arrayNumber,
              [VarType.arrayObject]: VarType.arrayObject,
            } as Record<VarType, VarType>
          )[outputItemType] || VarType.arrayString
      })
      setInputs(newInputs)
      deleteNodeInspectorVars(id)
    },
    [deleteNodeInspectorVars, id, inputs, setInputs],
  )

  const changeParallel = useCallback(
    (value: boolean) => {
      const newInputs = produce(inputs, (draft) => {
        draft.is_parallel = value
      })
      setInputs(newInputs)
    },
    [inputs, setInputs],
  )

  const changeErrorResponseMode = useCallback(
    (item: SelectOption) => {
      const newInputs = produce(inputs, (draft) => {
        draft.error_handle_mode = item.value
      })
      setInputs(newInputs)
    },
    [inputs, setInputs],
  )
  const changeParallelNums = useCallback(
    (num: number) => {
      const newInputs = produce(inputs, (draft) => {
        draft.parallel_nums = num
      })
      setInputs(newInputs)
    },
    [inputs, setInputs],
  )

  const changeFlattenOutput = useCallback(
    (value: boolean) => {
      const newInputs = produce(inputs, (draft) => {
        draft.flatten_output = value
      })
      setInputs(newInputs)
    },
    [inputs, setInputs],
  )

  return {
    readOnly,
    inputs,
    filterInputVar,
    handleInputChange,
    childrenNodeVars,
    iterationChildrenNodes,
    handleOutputVarChange,
    changeParallel,
    changeErrorResponseMode,
    changeParallelNums,
    changeFlattenOutput,
  }
}

export default useConfig