surgeventures/surgex

defmodule Surgex.Parser.BooleanParser do
  @moduledoc false

  @spec call(term()) :: {:ok, boolean() | nil} | {:error, :invalid_boolean}
  def call(nil), do: {:ok, nil}
  def call(""), do: {:ok, nil}
  def call("0"), do: {:ok, false}
  def call("1"), do: {:ok, true}
  def call("false"), do: {:ok, false}
  def call("true"), do: {:ok, true}
  def call(false), do: {:ok, false}
  def call(true), do: {:ok, true}
  def call(_input), do: {:error, :invalid_boolean}
end