Class: ContractedValue::Value

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

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(input_attr_values = {}) ⇒ Value

rubocop:disable Metrics/CyclomaticComplexity rubocop:disable Metrics/AbcSize



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# File 'lib/contracted_value/core.rb', line 240

def initialize(input_attr_values = {})
  input_attr_values_hash =
    case input_attr_values
    when ::Hash
      input_attr_values
    when Value
      input_attr_values.to_h
    else
      raise(
        Errors::InvalidInputType.new(
          input_attr_values,
        ),
      )
    end

  attribute_set = self.class.send(:attribute_set)
  attribute_set.each_attribute do |attribute|
    attr_value = attribute.extract_value(input_attr_values_hash)

    sometimes_frozen_attr_value =
      case attribute.refrigeration_mode
      when RefrigerationMode::Enum::DEEP
        # Use ice_nine for deep freezing
        ::IceNine.deep_freeze(attr_value)
      when RefrigerationMode::Enum::SHALLOW
        # No need to re-freeze
        attr_value.frozen? ? attr_value : attr_value.freeze
      when RefrigerationMode::Enum::NONE
        # No freezing
        attr_value
      else
        raise Errors::InvalidRefrigerationMode.new(
          refrigeration_mode,
        )
      end

    # Using symbol since attribute names are limited in number
    # An alternative would be using frozen string
    instance_variable_set(
      :"@#{attribute.name}",
      sometimes_frozen_attr_value,
    )
  end

  if self.class.send(:should_detect_unexpected_keys)
    unexpected_keys = attribute_set.detect_unexpected_keys(input_attr_values_hash)
    if unexpected_keys.any?
      raise Errors::UnexpectedInputKeys.new(
        unexpected_keys,
      )
    end
  end

  freeze
end

Class Method Details

.inherited(child_klass) ⇒ Object 



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# File 'lib/contracted_value/core.rb', line 307

def inherited(child_klass)
  super

  child_klass.instance_variable_set(:@attribute_set, AttributeSet.new)
  child_klass.instance_variable_set(
    :@should_detect_unexpected_keys,
    if child_klass.superclass.respond_to?(:should_detect_unexpected_keys, true)
      child_klass.superclass.send(:should_detect_unexpected_keys)
    else
      false
    end
  )

end

Instance Method Details

#to_h ⇒ Object

rubocop:enable Metrics/AbcSize rubocop:enable Metrics/CyclomaticComplexity



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# File 'lib/contracted_value/core.rb', line 298

def to_h
  self.class.send(:attribute_set).
    each_attribute.each_with_object({}) do |attribute, hash|
      hash[attribute.name] = instance_variable_get(:"@#{attribute.name}")
    end
end