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