defmodule DecentralisedBookIndex.Helpers do
  @moduledoc "Helpers for tests"

  @doc """
  Rerurn a new map with same keys as in map_with_keys.
  """
  def get_submap(map, map_with_keys) when is_map(map_with_keys) do
    Map.take(map, Map.keys(map_with_keys))
  end

  def get_submap(map, keys) when is_list(keys) do
    Map.take(map, keys)
  end

  def get_submaps(map_list, keys) do
    Enum.map(map_list, fn map ->
      get_submap(map, keys)
    end)
  end
end