ama-team / cookbook-linux-user-management

          class RoleTree

            include Mixin::Entity

            attribute :root, [Hash, K: Symbol, V: [:*, NilClass]], default: {}

            normalizer_block do |entity, *|

              entity.root

            end

            denormalizer_block do |input, *|

              break RoleTree.new(input) if input.is_a?(Hash)

              raise "Expected Hash, received #{input.class}"

            end

            def initialize(root = {})

              @root = root

            end

            def contains(path)

              cursor = @root

              path.each do |segment|

                return false unless cursor.respond_to?(:key?)

                candidates = [segment.to_s, segment.to_sym]

                next_segment = candidates.find do |candidate|

                  cursor.key?(candidate)

                end

                return false unless next_segment

                cursor = cursor[next_segment]

              end

              true

            end

          end