defmodule DockerAPI.Auth do
  defstruct username: "", password: "", email: "", auth: ""
  @type t :: %{username: String.t, password: String.t, email: String.t, auth: String.t}

  @doc """
  Generate a Base64 encoded auth header from a struct
  """
  @spec encode(DockerAPI.Auth.t) :: String.t
  def encode(auth) when is_map(auth) do
    auth |> Poison.encode! |> Base.encode64
  end

  @doc """
  Generate a Base64 encoded auth header from values
  """
  @spec encode(username::String.t, password::String.t, email::String.t) :: base64::String.t
  def encode(username, password, email) do
    %DockerAPI.Auth{username: username, password: password, email: email}
      |> Poison.encode!
      |> Base.encode64
  end
end