Class: Utopia::Controller::Variables

Inherits:
Object
  • Object
show all
Defined in:
lib/utopia/controller/variables.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Variables

Returns a new instance of Variables.



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# File 'lib/utopia/controller/variables.rb', line 24

def initialize
	@controllers = []
end

Instance Method Details

#<<(controller) ⇒ Object 



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# File 'lib/utopia/controller/variables.rb', line 28

def << controller
	top = @controllers.last
	
	@controllers << controller
	
	# This ensures that most variables will be at the top and controllers can naturally interactive with instance variables.
	controller.copy_instance_variables(top) if top
end

#[](key) ⇒ Object 



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# File 'lib/utopia/controller/variables.rb', line 65

def [] key
	fetch("@#{key}".to_sym) { nil }
end

#fetch(key) ⇒ Object 



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# File 'lib/utopia/controller/variables.rb', line 37

def fetch(key)
	@controllers.reverse_each do |controller|
		if controller.instance_variables.include?(key)
			return controller.instance_variable_get(key)
		end
	end
	
	if block_given?
		yield key
	else
		raise KeyError.new(key)
	end
end

#to_hash ⇒ Object 



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# File 'lib/utopia/controller/variables.rb', line 51

def to_hash
	attributes = {}

	@controllers.each do |controller|
		controller.instance_variables.each do |name|
			key = name[1..-1]
			
			attributes[key] = controller.instance_variable_get(name)
		end
	end

	return attributes
end