dblommesteijn/wiki-api

# frozen_string_literal: true

module Wiki
  module Api
    class Util
      class << self
        def element_to_text(element)
          raise('not an element') unless element.is_a?(Nokogiri::XML::Element)

          clean_text(element.text)
        end

        def element_filter_lists(element)
          raise('not an element') unless element.is_a?(Nokogiri::XML::Element)

          result = {}
          element.search('li').each_with_index do |li, i|
            li.children.each do |child|
              result[i] ||= []
              result[i] << clean_text(child.text)
            end
          end
          result.map { |_k, v| v.join('') }
        end

        def parent_root(current_object)
          current = current_object
          loop do
            break if current.parent.nil?

            current = current.parent
          end
          current
        end

        protected

        def clean_text(text)
          text.gsub(/\n/, ' ').squeeze(' ').gsub(/\s(\W)/, '\1').gsub(/(\W)\s/, '\1 ').strip
        end
      end
    end
  end
end