Module: SmartInit

Included in:
Base
Defined in:
lib/smart_init.rb,
lib/smart_init/main.rb,
lib/smart_init/version.rb

Defined Under Namespace

Classes: Base

Constant Summary collapse

VERSION = 
"2.0.2"

Instance Method Summary collapse

Instance Method Details

#initialize_with(*attributes) ⇒ Object 



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# File 'lib/smart_init/main.rb', line 8

def initialize_with *attributes
  define_method :initialize do |*parameters|
    if attributes.count != parameters.count
      raise ArgumentError, "wrong number of arguments (given #{parameters.count}, expected #{attributes.count})"
    end

    attributes.zip(parameters).each do |pair|
      name = pair[0]
      value = pair[1]
      instance_variable_set("@#{name}", value)
    end
  end

  instance_eval do
    private

    attr_reader *attributes
  end
end

#initialize_with_keywords(*attributes) ⇒ Object 



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# File 'lib/smart_init/main.rb', line 28

def initialize_with_keywords *attributes
  class_variable_set(:@@_attributes, attributes)
  @@_attributes = attributes

  required_attrs = attributes.select { |attr| attr.is_a?(Symbol) }
  default_value_attrs = attributes.select { |attr| attr.is_a?(Hash) }.first || {}

  class_variable_set(:@@_required_attrs, required_attrs)
  class_variable_set(:@@_default_value_attrs, default_value_attrs)
  @@_required_attrs = required_attrs
  @@_default_value_attrs = default_value_attrs

  class_eval <<-METHOD
    def initialize(#{(@@_required_attrs + @@_default_value_attrs.keys).compact.map { |a| @@_default_value_attrs[a] ? "#{a.to_s}: '#{@@_default_value_attrs.fetch(a)}'" : "#{a}:" }.join(', ')})
      @@_required_attrs&.each do |attribute|
        instance_variable_set(
          "@"+ attribute.to_s,
          eval(attribute.to_s)
        )
      end

      @@_default_value_attrs&.keys.each do |attribute|
        instance_variable_set(
          "@"+ attribute.to_s,
          eval(attribute.to_s)
        )
      end
    end
  METHOD

  instance_eval do
    private

    attr_reader *(required_attrs + default_value_attrs&.keys)
  end
end

#is_callable ⇒ Object 



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# File 'lib/smart_init/main.rb', line 2

def is_callable
  define_singleton_method :call do |*parameters|
    new(*parameters).call
  end
end