module ExtendIt::Base

Public Class Methods

extended(base) click to toggle source
# File lib/extend_it/base.rb, line 6
def self.extended(base)
  base.instance_eval do
    define_singleton_method :parents do
      @parents ||= ancestors.take_while { |a| a != base }.concat([base])
    end
  end
end

Public Instance Methods

attr_checker(*names) click to toggle source
# File lib/extend_it/base.rb, line 23
def attr_checker(*names)
  names = names.ensure_array(:flatten, :ensure_symbol, :compact, :uniq)
  names.each do |name|
    define_method "#{name}?" do
      instance_variable_get("@#{name}") == true
    end
  end
end
call_inherited(method_name, *args, base_first: false, &block) click to toggle source
# File lib/extend_it/base.rb, line 32
def call_inherited(method_name, *args, base_first: false, &block)
  arr = parents.select { |parent| parent.methods.include?(method_name) }
  arr.reverse! if base_first == true
  arr.reduce([]) { |a, e| a << e.send(method_name, *args, &block) }
end
class_attr_reader(*attrs) click to toggle source
# File lib/extend_it/base.rb, line 49
def class_attr_reader(*attrs)
  attrs.ensure_array(:flatten).each do |attr_name|
    attr_name.ensure_symbol(name_of: :local) || next
    next if instance_methods.include?(attr_name)
    var_name = attr_name.ensure_symbol(name_of: :instance_variable)
    if methods.include?(attr_name)
      define_method(attr_name) { self.class.send(attr_name) }
    else
      define_method attr_name do
        p = self.class.parents.find do |parent|
          parent.instance_variable_defined?(var_name)
        end
        p.nil? ? nil : p.instance_variable_get(var_name)
      end
    end
  end
end
inherited_class_reader(*names) click to toggle source
# File lib/extend_it/base.rb, line 38
def inherited_class_reader(*names)
  names = names.ensure_array(:flatten, :ensure_symbol, :compact, :uniq)
  names.each do |name|
    var = "@#{name}"
    define_singleton_method(name) do
      p = parents.find { |parent| parent.instance_variable_defined?(var) }
      p.nil? ? nil : p.instance_variable_get(var)
    end
  end
end
metaclass(&block) click to toggle source
# File lib/extend_it/base.rb, line 14
def metaclass(&block)
  if @metaclass.nil?
    @metaclass = (class << self; self end)
    @metaclass.extend(Base)
  end
  @metaclass.class_eval(&block) if block_given?
  @metaclass
end