dify/web/app/components/workflow/nodes/iteration/default.ts

import type { TFunction } from 'i18next'
import type { NodeDefault } from '../../types'
import type { IterationNodeType } from './types'
import { BlockClassification } from '@/app/components/workflow/block-selector/types'
import { genNodeMetaData } from '@/app/components/workflow/utils'
import { BlockEnum, ErrorHandleMode } from '../../types'

const i18nPrefix = ''

const metaData = genNodeMetaData({
  classification: BlockClassification.Logic,
  sort: 2,
  type: BlockEnum.Iteration,
  isTypeFixed: true,
})
const nodeDefault: NodeDefault<IterationNodeType> = {
  metaData,
  defaultValue: {
    start_node_id: '',
    iterator_selector: [],
    output_selector: [],
    _children: [],
    _isShowTips: false,
    is_parallel: false,
    parallel_nums: 10,
    error_handle_mode: ErrorHandleMode.Terminated,
    flatten_output: true,
  },
  checkValid(payload: IterationNodeType, t: TFunction<'workflow'>) {
    let errorMessages = ''

    if (!errorMessages && (!payload.iterator_selector || payload.iterator_selector.length === 0)) {
      errorMessages = t(($) => $[`${i18nPrefix}errorMsg.fieldRequired`], {
        ns: 'workflow',
        field: t(($) => $[`${i18nPrefix}nodes.iteration.input`], { ns: 'workflow' }),
      })
    }

    if (!errorMessages && (!payload.output_selector || payload.output_selector.length === 0)) {
      errorMessages = t(($) => $[`${i18nPrefix}errorMsg.fieldRequired`], {
        ns: 'workflow',
        field: t(($) => $[`${i18nPrefix}nodes.iteration.output`], { ns: 'workflow' }),
      })
    }

    return {
      isValid: !errorMessages,
      errorMessage: errorMessages,
    }
  },
}

export default nodeDefault