lib/zendesk_api/track_changes.rb
module ZendeskAPI
# Shamelessly stolen and modified from https://github.com/archan937/dirty_hashy
# @private
module TrackChanges
def self.included(base)
base.method_defined?(:regular_writer).tap do |defined|
base.send :include, InstanceMethods
unless defined
base.send :alias_method, :_store, :store
base.send :alias_method, :store, :regular_writer
base.send :alias_method, :[]=, :store
base.send :define_method, :update do |other|
other.each { |key, value| store key, value }
end
base.send :alias_method, :merge!, :update
end
end
end
# @private
module InstanceMethods
def clear_changes
each do |k, v|
if v.respond_to?(:clear_changes)
v.clear_changes
elsif v.is_a?(Array)
v.each do |val|
if val.respond_to?(:clear_changes)
val.clear_changes
end
end
end
end
changes.clear
end
def replace(other)
clear
merge! other
end
def clear
keys.each { |key| delete key }
end
def regular_writer(key, value)
if has_key?(key) && self[key] == value
value
else
changes[key] = value
defined?(_store) ? _store(key, value) : super(key, value)
end
end
def delete(key)
super.tap do |value|
changes[key] = nil
end
end
def changes
(@changes ||= self.class.superclass.new).tap do |changes|
each do |k, v|
if v.respond_to?(:changed?) && v.changed?
changes[k] = v.changes
elsif v.is_a?(Array) && v.any? { |val| val.respond_to?(:changed?) && val.changed? }
changes[k] = v
end
end
end
end
def changed?(key = nil)
if key.nil?
!changes.empty? || any? { |_, v| v.respond_to?(:changed?) && v.changed? }
else
changes.key?(key)
end
end
alias :dirty? :changed?
end
end
end