Class: Magic::Presenter::Base

Inherits:
Decorator::Base
  • Object
show all
Includes:
GlobalID, Helpers
Defined in:
lib/magic/presenter/base.rb

Overview

Magic Presenter

Any presenter should inherit Magic::Presenter::Base. It further inherits from SimpleDelegator and behaves like that.

Presenter class inference

Presenters provide automatic class inference for any model based on its class name powered by Magic Lookup. For example, MyModel.new looks for MyPresenter first. If not found, it looks for presenters of its ancestor classes, up to ObjectPresenter.

Class Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Magic::Presenter::Helpers

Class Method Details

.descendants ⇒ Object 



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# File 'lib/magic/presenter/base.rb', line 50

def descendants
  Magic.eager_load :presenters

  super
end

.model_class ⇒ Object 



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# File 'lib/magic/presenter/base.rb', line 30

def model_class
  Presentable.classes
      .select { self.for(_1) == self }
      .optional do |classes|
        next unless classes.many?

        classes
            .select { name_for(_1) == name }
            .optional { classes if _1.empty? } # lookup failed — return original
      end
      .sole
rescue Enumerable::SoleItemExpectedError => error
  raise Lookup::Error, "#{error.message
      .sub('items', 'model classes')
      .sub('item',  'model class')
  } for #{self}"
end

.name_for(object_class) ⇒ Object 



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# File 'lib/magic/presenter/base.rb', line 22

def name_for object_class
  object_class
      .to_s
      .delete_suffix('Model')
      .delete_suffix('Record')
      .then { "#{_1}Presenter" }
end