def validate()

in api/src/main/scala/com/gu/adapters/http/Image.scala [38:50]

• 11 lines of code
• 5 McCabe index (conditional complexity)

  def validate(image: Array[Byte]): Either[Error, String] = {
    // guessContentTypeFromStream only works with streams than support mark and reset
    val is = new ByteArrayInputStream(image)
    val mimeType = attempt(URLConnection.guessContentTypeFromStream(is))
      .toEither
      .left.map(_ => invalidMimeType(List("Unable to verify mime type of file")))

    mimeType match {
      case i @ (Right("image/png") | Right("image/jpeg")) => i
      case i @ Right("image/gif") if notAnimated(is) => i
      case _ => Left(invalidMimeType(List("Uploaded images must be of type png, jpeg, or gif (non-animated)")))
    }
  }