gsmlg_logger

defmodule GSMLG.Logger.Formatter.MapBuilder do
  @moduledoc false

  @doc """
  Optionally put a value to a map.
  """
  def maybe_put(map, _key, nil), do: map
  def maybe_put(map, key, value), do: Map.put(map, key, value)

  @doc """
  Optionally merge two maps.
  """
  def maybe_merge(map, nil), do: map
  def maybe_merge(left_map, right_map), do: Map.merge(right_map, left_map)

  @doc """
  Update a map key using a callback function. Noop if the key does not exist.
  """
  def maybe_update(map, key, cb) do
    if Map.has_key?(map, key) do
      Map.update!(map, key, cb)
    else
      map
    end
  end
end