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#--
# Copyright:: Copyright 2016, Chef Software, 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.
#
class Chef
class Node
module Mixin
module StateTracking
attr_reader :__path__
attr_reader :__root__
attr_reader :__node__
attr_reader :__precedence__
def initialize(data = nil, root = self, node = nil, precedence = nil)
# __path__ and __root__ must be nil when we call super so it knows
# to avoid resetting the cache on construction
data.nil? ? super() : super(data)
@__path__ = []
@__root__ = root
@__node__ = node
@__precedence__ = precedence
end
def [](*args)
ret = super
key = args.first
next_path = [ __path__, convert_key(key) ].flatten.compact
copy_state_to(ret, next_path)
end
def []=(*args)
ret = super
key = args.first
value = args.last
next_path = [ __path__, convert_key(key) ].flatten.compact
send_attribute_changed_event(next_path, value)
copy_state_to(ret, next_path)
end
protected
def __path__=(path)
@__path__ = path
end
def __root__=(root)
@__root__ = root
end
def __precedence__=(precedence)
@__precedence__ = precedence
end
def __node__=(node)
@__node__ = node
end
private
def send_attribute_changed_event(next_path, value)
if __node__ && __node__.run_context && __node__.run_context.events
__node__.run_context.events.attribute_changed(__precedence__, next_path, value)
end
end
def send_reset_cache(path = nil, key = nil)
next_path = [ path, key ].flatten.compact
__root__.reset_cache(next_path.first) if !__root__.nil? && __root__.respond_to?(:reset_cache) && !next_path.nil?
end
def copy_state_to(ret, next_path)
if ret.is_a?(StateTracking)
ret.__path__ = next_path
ret.__root__ = __root__
ret.__node__ = __node__
ret.__precedence__ = __precedence__
end
ret
end
end
end
end
end
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