module Wongi::Engine::CoreExt::ClassMethods

Public Instance Methods

abstract(name) click to toggle source
# File lib/wongi-engine/core_ext.rb, line 43
def abstract(name)
  define_method name do |*_args|
    raise NoMethodError.new "#{name} is not implemented for #{self.class.name}", name
  end
end
attr_predicate(*names) click to toggle source
# File lib/wongi-engine/core_ext.rb, line 4
def attr_predicate(*names)
  names_hash = names.inject({}) do |hash, element|
    if element.is_a?(Hash)
      hash.merge element
    else
      hash[element] = false
      hash
    end
  end

  names_hash.each do |name, def_value|
    varname = "@#{name}".to_sym
    predname = "#{name}?".to_sym
    setname = "#{name}=".to_sym
    exclname = "#{name}!".to_sym
    noexclname = "no_#{name}!".to_sym

    define_method predname do
      if instance_variable_defined?(varname)
        instance_variable_get(varname)
      else
        def_value
      end
    end

    define_method setname do |newvalue|
      instance_variable_set(varname, newvalue == true)
    end

    define_method exclname do
      instance_variable_set(varname, true)
    end

    define_method noexclname do
      instance_variable_set(varname, false)
    end
  end
end