defmodule DateParams.Plug do
  @moduledocc"""
  A helpful plug that take incoming paramaters and transforms the values into
  native `Date` and `NaiveDateTime` structs.
  
  Set it up in a controller like so:

      plug DateParams.Plug, [["vacation", "starts_at"], ["vacation", "ends_at"]]

  """

  def init(opts), do: opts

  def call(conn = %{params: params}, opts) do
    %{conn | params: DateParams.to_structs(params, opts)}
  end
end