dify/web/app/components/workflow/nodes/data-source-empty/index.tsx

import {
  memo,
  useCallback,
} from 'react'
import { useTranslation } from 'react-i18next'
import type { NodeProps } from 'reactflow'
import { RiAddLine } from '@remixicon/react'
import cn from '@/utils/classnames'
import Button from '@/app/components/base/button'
import BlockSelector from '@/app/components/workflow/block-selector'
import { useReplaceDataSourceNode } from './hooks'

const DataSourceEmptyNode = ({ id }: NodeProps) => {
  const { t } = useTranslation()
  const { handleReplaceNode } = useReplaceDataSourceNode(id)

  const renderTrigger = useCallback(() => {
    return (
      <Button
        variant='primary'
        className='w-full'
      >
        <RiAddLine className='mr-1 h-4 w-4' />
        {t('workflow.nodes.dataSource.add')}
      </Button>
    )
  }, [])

  return (
    <div
      className={cn(
        'relative flex rounded-2xl border',
        'border-transparent',
      )}
    >
      <div className='absolute inset-[-2px] top-[-22px] z-[-1] rounded-[18px] bg-node-data-source-bg p-0.5 backdrop-blur-[6px]'>
        <div className='system-2xs-semibold-uppercase flex h-5 items-center px-2.5 text-text-tertiary'>
          {t('workflow.blocks.datasource')}
        </div>
      </div>
      <div
        className={cn(
          'group relative shadow-xs',
          'rounded-[15px] border border-transparent',
          'w-[240px] bg-workflow-block-bg',
        )}
      >
        <div className={cn(
          'flex items-center rounded-t-2xl p-3',
        )}>
          <BlockSelector
            asChild
            onSelect={handleReplaceNode}
            trigger={renderTrigger}
            noBlocks
            noTools
            popupClassName='w-[320px]'
            placement='bottom-start'
            offset={{
              mainAxis: 4,
              crossAxis: 0,
            }}
          />
        </div>
      </div>
    </div>
  )
}

export default memo(DataSourceEmptyNode)