# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

defmodule KeysTrimPlugin do
  @moduledoc """
  trim
  """
  use Plugin
  require Logger
  def transform(dict, options \\ %{} ) do
    if not MapUtils.all_required_keys?(options, ["mode"]) do
      dict
    else
      List.foldl(Map.keys(dict), dict,
        fn old_key, acc ->
          new_key = String.trim(old_key)
          value = acc[old_key]
          #new_value = if is_binary(value), do: String.trim(value), else: value
          if old_key != new_key do
            acc
              |> KeysAddPlugin.transform(%{"keys" => %{new_key => value}, "mode" => options["mode"]})
              |> KeysDeletePlugin.transform(%{"keys" => [old_key]})
          else
            acc
          end #if
        end) #foldl
    end
  end

end