Teej Settings parser

settings.ex

❯ iex
Erlang/OTP 26 [erts-14.2.3] [source] [64-bit] [smp:24:24] [ds:24:24:10] [async-threads:1] [jit:ns]

Interactive Elixir (1.16.2) - press Ctrl+C to exit (type h() ENTER for help)
[dev] iex [17:05 :: 1] > defmodule Settings do
[dev] ... [17:05 :: 1] >   def parse(settings) do
[dev] ... [17:05 :: 1] >     [
[dev] ... [17:05 :: 1] >       Enum.map(~w[feature feature2]a, &{:"is_#{&1}_enabled", &1}),
[dev] ... [17:05 :: 1] >       Enum.map(~w[feature3 feature4]a, &{:"is_another_#{&1}_true", &1})
[dev] ... [17:05 :: 1] >     ]
[dev] ... [17:05 :: 1] >     |> List.flatten()
[dev] ... [17:05 :: 1] >     |> Enum.map(fn {toggle, setting} ->
[dev] ... [17:05 :: 1] >       {Map.get(settings, toggle), setting, Map.get(settings, setting)}
[dev] ... [17:05 :: 1] >     end)
[dev] ... [17:05 :: 1] >     |> Enum.reduce(%{}, fn
[dev] ... [17:05 :: 1] >       {true, key, value}, acc -> Map.put(acc, key, value)
[dev] ... [17:05 :: 1] >       _, acc -> acc
[dev] ... [17:05 :: 1] >     end)
[dev] ... [17:05 :: 1] >   end
[dev] ... [17:05 :: 1] > end
{:module, Settings, <<...>>, {:parse, 1}}
[dev] iex [17:05 :: 2] > settings = %{
[dev] ... [17:05 :: 2] >   is_feature_enabled: true,
[dev] ... [17:05 :: 2] >   feature: :test,
[dev] ... [17:05 :: 2] >   is_feature2_enabled: false,
[dev] ... [17:05 :: 2] >   feature2: :test2,
[dev] ... [17:05 :: 2] >   is_another_feature3_true: true,
[dev] ... [17:05 :: 2] >   feature3: :test3,
[dev] ... [17:05 :: 2] >   is_another_feature4_true: false,
[dev] ... [17:05 :: 2] >   feature4: :test4
[dev] ... [17:05 :: 2] > }
%{
  feature: :test,
  feature2: :test2,
  feature3: :test3,
  feature4: :test4,
  is_another_feature3_true: true,
  is_another_feature4_true: false,
  is_feature2_enabled: false,
  is_feature_enabled: true
}
[dev] iex [17:05 :: 3] > Settings.parse(settings)
%{feature: :test, feature3: :test3}