ex_njuskalo

defmodule ExNjuskalo.Helpers do
  def maybe_put(map, _key, nil), do: map
  def maybe_put(map, key, value), do: Map.put(map, key, value)
  def maybe_put(map, false, _key, _value), do: map
  def maybe_put(map, true, key, value), do: maybe_put(map, key, value)

  @doc """
  Convert map string keys to :atom keys
  """
  def atomize_keys(nil), do: nil

  # Structs don't do enumerable and anyway the keys are already
  # atoms
  def atomize_keys(struct = %{__struct__: _}) do
    struct
  end

  def atomize_keys(map = %{}) do
    map
    |> Enum.map(fn {k, v} -> {String.to_atom(k), atomize_keys(v)} end)
    |> Enum.into(%{})
  end

  # Walk the list and atomize the keys of
  # of any map members
  def atomize_keys([head | rest]) do
    [atomize_keys(head) | atomize_keys(rest)]
  end

  def atomize_keys(not_a_map) do
    not_a_map
  end
end