#
# Author:: John Keiser (<jkeiser@opscode.com>)
# Copyright:: Copyright (c) 2013 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

require 'chef_fs/file_system/base_fs_dir'
require 'chef_fs/file_system/acl_entry'
require 'chef_fs/file_system/operation_not_allowed_error'

module ChefFS
  module FileSystem
    class AclDir < BaseFSDir
      def api_path
        parent.parent.child(name).api_path
      end

      def child(name)
        result = @children.select { |child| child.name == name }.first if @children
        result ||= can_have_child?(name, false) ?
                   AclEntry.new(name, self) : NonexistentFSObject.new(name, self)
      end

      def can_have_child?(name, is_dir)
        name =~ /\.json$/ && !is_dir
      end

      def children
        if @children.nil?
          # Grab the ACTUAL children (/nodes, /containers, etc.) and get their names
          names = parent.parent.child(name).children.map { |child| child.dir? ? "#{child.name}.json" : child.name }
          @children = names.map { |name| AclEntry.new(name, self, true) }
        end
        @children
      end

      def create_child(name, file_contents)
        raise OperationNotAllowedError.new(:create_child, self), "ACLs can only be updated, and can only be created when the corresponding object is created."
      end

      def data_handler
        parent.data_handler
      end

      def rest
        parent.rest
      end
    end
  end
end
