dify/web/app/components/workflow/nodes/iteration/panel.tsx

import type { FC } from 'react'
import React from 'react'
import { useTranslation } from 'react-i18next'
import VarReferencePicker from '../_base/components/variable/var-reference-picker'
import Split from '../_base/components/split'
import { MIN_ITERATION_PARALLEL_NUM } from '../../constants'
import type { IterationNodeType } from './types'
import useConfig from './use-config'
import { ErrorHandleMode, type NodePanelProps } from '@/app/components/workflow/types'
import Field from '@/app/components/workflow/nodes/_base/components/field'
import Switch from '@/app/components/base/switch'
import Select from '@/app/components/base/select'
import Slider from '@/app/components/base/slider'
import Input from '@/app/components/base/input'
import { MAX_PARALLEL_LIMIT } from '@/config'

const i18nPrefix = 'workflow.nodes.iteration'

const Panel: FC<NodePanelProps<IterationNodeType>> = ({
  id,
  data,
}) => {
  const { t } = useTranslation()
  const responseMethod = [
    {
      value: ErrorHandleMode.Terminated,
      name: t(`${i18nPrefix}.ErrorMethod.operationTerminated`),
    },
    {
      value: ErrorHandleMode.ContinueOnError,
      name: t(`${i18nPrefix}.ErrorMethod.continueOnError`),
    },
    {
      value: ErrorHandleMode.RemoveAbnormalOutput,
      name: t(`${i18nPrefix}.ErrorMethod.removeAbnormalOutput`),
    },
  ]
  const {
    readOnly,
    inputs,
    filterInputVar,
    handleInputChange,
    childrenNodeVars,
    iterationChildrenNodes,
    handleOutputVarChange,
    changeParallel,
    changeErrorResponseMode,
    changeParallelNums,
  } = useConfig(id, data)

  return (
    <div className='pb-2 pt-2'>
      <div className='space-y-4 px-4 pb-4'>
        <Field
          title={t(`${i18nPrefix}.input`)}
          required
          operations={(
            <div className='system-2xs-medium-uppercase flex h-[18px] items-center rounded-[5px] border border-divider-deep px-1 capitalize text-text-tertiary'>Array</div>
          )}
        >
          <VarReferencePicker
            readonly={readOnly}
            nodeId={id}
            isShowNodeName
            value={inputs.iterator_selector || []}
            onChange={handleInputChange}
            filterVar={filterInputVar}
          />
        </Field>
      </div>
      <Split />
      <div className='mt-2 space-y-4 px-4 pb-4'>
        <Field
          title={t(`${i18nPrefix}.output`)}
          required
          operations={(
            <div className='system-2xs-medium-uppercase flex h-[18px] items-center rounded-[5px] border border-divider-deep px-1 capitalize text-text-tertiary'>Array</div>
          )}
        >
          <VarReferencePicker
            readonly={readOnly}
            nodeId={id}
            isShowNodeName
            value={inputs.output_selector || []}
            onChange={handleOutputVarChange}
            availableNodes={iterationChildrenNodes}
            availableVars={childrenNodeVars}
          />
        </Field>
      </div>
      <div className='px-4 pb-2'>
        <Field title={t(`${i18nPrefix}.parallelMode`)} tooltip={<div className='w-[230px]'>{t(`${i18nPrefix}.parallelPanelDesc`)}</div>} inline>
          <Switch defaultValue={inputs.is_parallel} onChange={changeParallel} />
        </Field>
      </div>
      {
        inputs.is_parallel && (<div className='px-4 pb-2'>
          <Field title={t(`${i18nPrefix}.MaxParallelismTitle`)} isSubTitle tooltip={<div className='w-[230px]'>{t(`${i18nPrefix}.MaxParallelismDesc`)}</div>}>
            <div className='row flex'>
              <Input type='number' wrapperClassName='w-18 mr-4 ' max={MAX_PARALLEL_LIMIT} min={MIN_ITERATION_PARALLEL_NUM} value={inputs.parallel_nums} onChange={(e) => { changeParallelNums(Number(e.target.value)) }} />
              <Slider
                value={inputs.parallel_nums}
                onChange={changeParallelNums}
                max={MAX_PARALLEL_LIMIT}
                min={MIN_ITERATION_PARALLEL_NUM}
                className=' mt-4 flex-1 shrink-0'
              />
            </div>

          </Field>
        </div>)
      }
      <Split />

      <div className='px-4 py-2'>
        <Field title={t(`${i18nPrefix}.errorResponseMethod`)} >
          <Select items={responseMethod} defaultValue={inputs.error_handle_mode} onSelect={changeErrorResponseMode} allowSearch={false} />
        </Field>
      </div>
    </div>
  )
}

export default React.memo(Panel)