dify/web/app/components/workflow/nodes/_base/node.tsx

import type {
  FC,
  ReactElement,
} from 'react'
import {
  cloneElement,
  memo,
  useEffect,
  useMemo,
  useRef,
} from 'react'
import cn from 'classnames'
import type { NodeProps } from '../../types'
import {
  BlockEnum,
  NodeRunningStatus,
} from '../../types'
import {
  useNodesReadOnly,
  useToolIcon,
} from '../../hooks'
import { useNodeIterationInteractions } from '../iteration/use-interactions'
import {
  NodeSourceHandle,
  NodeTargetHandle,
} from './components/node-handle'
import NodeResizer from './components/node-resizer'
import NodeControl from './components/node-control'
import AddVariablePopupWithPosition from './components/add-variable-popup-with-position'
import BlockIcon from '@/app/components/workflow/block-icon'
import {
  CheckCircle,
  Loading02,
} from '@/app/components/base/icons/src/vender/line/general'
import { AlertCircle } from '@/app/components/base/icons/src/vender/line/alertsAndFeedback'

type BaseNodeProps = {
  children: ReactElement
} & NodeProps

const BaseNode: FC<BaseNodeProps> = ({
  id,
  data,
  children,
}) => {
  const nodeRef = useRef<HTMLDivElement>(null)
  const { nodesReadOnly } = useNodesReadOnly()
  const { handleNodeIterationChildSizeChange } = useNodeIterationInteractions()
  const toolIcon = useToolIcon(data)

  useEffect(() => {
    if (nodeRef.current && data.selected && data.isInIteration) {
      const resizeObserver = new ResizeObserver(() => {
        handleNodeIterationChildSizeChange(id)
      })

      resizeObserver.observe(nodeRef.current)

      return () => {
        resizeObserver.disconnect()
      }
    }
  }, [data.isInIteration, data.selected, id, handleNodeIterationChildSizeChange])

  const showSelectedBorder = data.selected || data._isBundled || data._isEntering
  const {
    showRunningBorder,
    showSuccessBorder,
    showFailedBorder,
  } = useMemo(() => {
    return {
      showRunningBorder: data._runningStatus === NodeRunningStatus.Running && !showSelectedBorder,
      showSuccessBorder: data._runningStatus === NodeRunningStatus.Succeeded && !showSelectedBorder,
      showFailedBorder: data._runningStatus === NodeRunningStatus.Failed && !showSelectedBorder,
    }
  }, [data._runningStatus, showSelectedBorder])

  return (
    <div
      className={cn(
        'flex border-[2px] rounded-2xl',
        showSelectedBorder ? 'border-primary-600' : 'border-transparent',
      )}
      ref={nodeRef}
      style={{
        width: data.type === BlockEnum.Iteration ? data.width : 'auto',
        height: data.type === BlockEnum.Iteration ? data.height : 'auto',
      }}
    >
      <div
        className={cn(
          'group relative pb-1 shadow-xs',
          'border border-transparent rounded-[15px]',
          data.type !== BlockEnum.Iteration && 'w-[240px] bg-[#fcfdff]',
          data.type === BlockEnum.Iteration && 'flex flex-col w-full h-full bg-[#fcfdff]/80',
          !data._runningStatus && 'hover:shadow-lg',
          showRunningBorder && '!border-primary-500',
          showSuccessBorder && '!border-[#12B76A]',
          showFailedBorder && '!border-[#F04438]',
          data._isBundled && '!shadow-lg',
        )}
      >
        {
          data._showAddVariablePopup && (
            <AddVariablePopupWithPosition
              nodeId={id}
              nodeData={data}
            />
          )
        }
        {
          data.type === BlockEnum.Iteration && (
            <NodeResizer
              nodeId={id}
              nodeData={data}
            />
          )
        }
        {
          !data._isCandidate && (
            <NodeTargetHandle
              id={id}
              data={data}
              handleClassName='!top-4 !-left-[9px] !translate-y-0'
              handleId='target'
            />
          )
        }
        {
          data.type !== BlockEnum.IfElse && data.type !== BlockEnum.QuestionClassifier && !data._isCandidate && (
            <NodeSourceHandle
              id={id}
              data={data}
              handleClassName='!top-4 !-right-[9px] !translate-y-0'
              handleId='source'
            />
          )
        }
        {
          !data._runningStatus && !nodesReadOnly && !data._isCandidate && (
            <NodeControl
              id={id}
              data={data}
            />
          )
        }
        <div className={cn(
          'flex items-center px-3 pt-3 pb-2 rounded-t-2xl',
          data.type === BlockEnum.Iteration && 'bg-[rgba(250,252,255,0.9)]',
        )}>
          <BlockIcon
            className='shrink-0 mr-2'
            type={data.type}
            size='md'
            toolIcon={toolIcon}
          />
          <div
            title={data.title}
            className='grow mr-1 text-[13px] font-semibold text-gray-700 truncate'
          >
            {data.title}
          </div>
          {
            data._iterationLength && data._iterationIndex && data._runningStatus === NodeRunningStatus.Running && (
              <div className='mr-1.5 text-xs font-medium text-primary-600'>
                {data._iterationIndex}/{data._iterationLength}
              </div>
            )
          }
          {
            (data._runningStatus === NodeRunningStatus.Running || data._singleRunningStatus === NodeRunningStatus.Running) && (
              <Loading02 className='w-3.5 h-3.5 text-primary-600 animate-spin' />
            )
          }
          {
            data._runningStatus === NodeRunningStatus.Succeeded && (
              <CheckCircle className='w-3.5 h-3.5 text-[#12B76A]' />
            )
          }
          {
            data._runningStatus === NodeRunningStatus.Failed && (
              <AlertCircle className='w-3.5 h-3.5 text-[#F04438]' />
            )
          }
        </div>
        {
          data.type !== BlockEnum.Iteration && (
            cloneElement(children, { id, data })
          )
        }
        {
          data.type === BlockEnum.Iteration && (
            <div className='grow pl-1 pr-1 pb-1'>
              {cloneElement(children, { id, data })}
            </div>
          )
        }
        {
          data.desc && data.type !== BlockEnum.Iteration && (
            <div className='px-3 pt-1 pb-2 text-xs leading-[18px] text-gray-500 whitespace-pre-line break-words'>
              {data.desc}
            </div>
          )
        }
      </div>
    </div>
  )
}

export default memo(BaseNode)