Class: Valuable

Inherits:
Object
  • Object
show all
Defined in:
lib/valuable.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(atts = {}) ⇒ Valuable

Returns a new instance of Valuable.



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# File 'lib/valuable.rb', line 9

def initialize(atts = {})
  atts.each { |name, value| __send__("#{name}=", value ) } 
end

Class Method Details

.attributes ⇒ Object 



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# File 'lib/valuable.rb', line 19

def attributes
  @attributes ||= []
end

.create_accessor_for(name) ⇒ Object 



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# File 'lib/valuable.rb', line 70

def create_accessor_for(name)
  define_method name do
    attributes[name]
  end
end

.create_setter_for(name, klass, default) ⇒ Object 



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# File 'lib/valuable.rb', line 35

def create_setter_for(name, klass, default)

  if klass == nil
    define_method "#{name}=" do |value|
      attributes[name] = value 
    end

  elsif klass == Integer

    define_method "#{name}=" do |value|
      value_as_integer = value && value.to_i
      attributes[name] = value_as_integer
    end

  elsif klass == String

    define_method "#{name}=" do |value|
      value_as_string = value && value.to_s
      attributes[name] = value_as_string
    end

  else

    define_method "#{name}=" do |value|
      if value.nil?
        attributes[name] = nil 
      elsif value.is_a? klass
        attributes[name] = value
      else
        attributes[name] = klass.new(value)
      end
    end
  end
end

.defaults ⇒ Object 



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# File 'lib/valuable.rb', line 23

def defaults
  @defaults ||= {}
end

.has_collection(name) ⇒ Object 



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# File 'lib/valuable.rb', line 76

def has_collection(name)
  has_value(name, default: [] )
end

.has_value(name, options = {}) ⇒ Object 



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# File 'lib/valuable.rb', line 27

def has_value(name, options={})
  attributes << name 
  defaults[name] = options[:default] unless options[:default].nil?

  create_accessor_for(name)
  create_setter_for(name, options[:klass], options[:default])
end

Instance Method Details

#attributes ⇒ Object 



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# File 'lib/valuable.rb', line 5

def attributes
  @attributes ||= HashWithIndifferentAccess.new(deep_duplicate_of(self.class.defaults)) 
end

#deep_duplicate_of(value) ⇒ Object 



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# File 'lib/valuable.rb', line 13

def deep_duplicate_of(value)
  Marshal.load(Marshal.dump(value))
end