defmodule Pushover do

  alias Pushover.AuthenticationError

  @missing_token_or_user_error_message"""
  To authenticated with Pushover you need to provide valid a user string and 
  an application token. Please include them in your application config file
  like so:

    config :pushover,
      user: "YOUR_USER"
      token: "YOUR_TOKEN",

  """

  def get_user do
    System.get_env("PUSHOVER_USER") ||
      Application.get_env(:pushover, :user) ||
        raise AuthenticationError, message: @missing_token_or_user_error_message
  end

  def get_token do
    System.get_env("PUSHOVER_TOKEN") ||
      Application.get_env(:pushover, :token) ||
        raise AuthenticationError, message: @missing_token_or_user_error_message
  end
end