dify/web/app/components/base/image-uploader/uploader.tsx

import type { ChangeEvent, FC } from 'react'
import { useState } from 'react'
import { useLocalFileUploader } from './hooks'
import type { ImageFile } from '@/types/app'
import { ALLOW_FILE_EXTENSIONS } from '@/types/app'

type UploaderProps = {
  children: (hovering: boolean) => JSX.Element
  onUpload: (imageFile: ImageFile) => void
  limit?: number
  disabled?: boolean
}

const Uploader: FC<UploaderProps> = ({
  children,
  onUpload,
  limit,
  disabled,
}) => {
  const [hovering, setHovering] = useState(false)
  const { handleLocalFileUpload } = useLocalFileUploader({ limit, onUpload, disabled })

  const handleChange = (e: ChangeEvent<HTMLInputElement>) => {
    const file = e.target.files?.[0]

    if (!file)
      return

    handleLocalFileUpload(file)
  }

  return (
    <div
      className='relative'
      onMouseEnter={() => setHovering(true)}
      onMouseLeave={() => setHovering(false)}
    >
      {children(hovering)}
      <input
        className={`
          absolute block inset-0 opacity-0 text-[0] w-full
          ${disabled ? 'cursor-not-allowed' : 'cursor-pointer'}
        `}
        onClick={e => (e.target as HTMLInputElement).value = ''}
        type='file'
        accept={ALLOW_FILE_EXTENSIONS.map(ext => `.${ext}`).join(',')}
        onChange={handleChange}
        disabled={disabled}
      />
    </div>
  )
}

export default Uploader