url_info

defmodule UrlInfo do

  def get(url) do
    uri = URI.parse(url)
    if valid_url?(uri) do
      [ type, name ] = parse_uri(uri)
      %{
        mime_type: "#{type}/#{name}",
        type: type
      }
    else
      %{ error: "invalid url" }
    end
  end

  def parse_uri(uri) do
    get_ext_from_uri(uri)
    |> MIME.type()
    |> String.split("/")
  end

  defp get_ext_from_uri(%URI{ path: nil }), do: nil
  defp get_ext_from_uri(%URI{ path: path }) do
    case Path.extname(path) do
      "" -> nil
      ext -> String.slice(ext, 1..(String.length(ext)))
    end
  end

  defp valid_url?(%URI{ scheme: nil }), do: false
  defp valid_url?(%URI{ host: nil }), do: false
  defp valid_url?(%URI{ scheme: "http" }), do: true
  defp valid_url?(%URI{ scheme: "https" }), do: true
  defp valid_url?(_uri), do: false

end