# encoding: utf-8 module Origin # Allows for easy delegation of origin queryable instance methods to a # specific method. module Forwardable # Tells origin with method on the class to delegate to when calling an # original selectable or optional method on the class. # # @example Tell origin where to select from. # class Band # extend Origin::Forwardable # select_with :criteria # # def self.criteria # Query.new # end # end # # @param [ Symbol ] receiver The name of the receiver method. # # @return [ Array ] The names of the forwarded methods. # # @since 1.0.0 def select_with(receiver) (Selectable.forwardables + Optional.forwardables).each do |name| __forward__(name, receiver) end end private # Forwards the method name to the provided receiver method. # # @api private # # @example Define the forwarding. # Model.__forward__(:exists, :criteria) # # @param [ Symbol ] name The name of the method. # @param [ Symbol ] receiver The name of the receiver method. # # @since 1.0.0 def __forward__(name, receiver) if self.class == Module module_eval <<-SEL def #{name}(*args, &block) #{receiver}.__send__(:#{name}, *args, &block) end SEL else (class << self; self; end).class_eval <<-SEL def #{name}(*args, &block) #{receiver}.__send__(:#{name}, *args, &block) end SEL end end end end