class_name ProxyData
extends Data
#

#05. signals
#06. enums
#07. constants
#08. exported variables
#09. public variables
#10. private variables
#11. onready variables
#12. optional built-in virtual _init method
#13. built-in virtual _ready method
#14. remaining built-in virtual methods
#15. public methods

func _init( p_data_filename, p_data = null ):
	.set_data( "item_filename", p_data_filename )
	.set_data( "modified_values", {} )

	var ref_data = Data.new()
	ref_data.set_data( "name", .get_data( "item_filename" ) )
	ref_data.load()
	if ref_data and ref_data is Data:
		self.data = ref_data
		var modified_values = {}
		for data_name in self.data.datas.keys():
			if self.data and p_data and not self.data.get_data( data_name ) == p_data.get_data( data_name ):               
				modified_values[ data_name ] = p_data.get_data( data_name )
		.set_data( "modified_values", modified_values )

func set_data( p_data_name, p_value ):
	if not .get_data( "modified_values" ):
		.set_data( "modified_values", {} )
	var new_modified_value = .get_data( "modified_values" )
	new_modified_value[ p_data_name ] = p_value
	.set_data( "modified_values", new_modified_value )

func get_data( p_key, p_default_value = null ):
	if .get_data( "modified_values" ) and p_key in .get_data( "modified_values" ):
		return .get_data( "modified_values" )[ p_key ]
	elif self.data:
		return self.data.get_data( p_key, p_default_value )
	return p_default_value

#func save( p_emplacement = "usr"):
#	.save( p_emplacement )
#
#func load( p_path = null, p_emplacement = "usr" ):
#	.load( p_path, p_emplacement )

#16. private methods