file-commons/src/dataUriToBlob.ts

type DataUriToBlob = (dataUri: string, name?: string) => Blob

const dataUriToBlob: DataUriToBlob = (dataUri, name) => {
  const [encoding, base64] = dataUri
    .slice('data:'.length)
    .split(',')
  const binary = atob(base64)
  const [type,] = encoding.split(';')
  const ab = new ArrayBuffer(binary.length)
  const ia = new Uint8Array(ab)
  for (let i = 0; i < binary.length; i++) {
    ia[i] = binary.charCodeAt(i)
  }
  if (typeof name! === 'string') {
    return new File([ab], name, { type, })
  }
  return new Blob([ab], { type, })
}

export default dataUriToBlob