Module: Statisfy::Subscriber::ClassMethods

Defined in:
lib/statisfy/subscriber.rb

Instance Method Summary collapse

Instance Method Details

#append_callback_to_model(model, event) ⇒ Object 



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# File 'lib/statisfy/subscriber.rb', line 17

def append_callback_to_model(model, event)
  listener = self

  statisfy_counter = lambda {
    counter = listener.new
    counter.subject = self
    counter.params = attributes
    counter
  }

  trigger_event = lambda { |statisfy_trigger|
    if listener.respond_to?(Statisfy.configuration.default_async_method) && statisfy_trigger != :destroy
      listener.send(Statisfy.configuration.default_async_method, attributes.merge(statisfy_trigger:))
    else
      instance_exec(&statisfy_counter).perform(attributes.merge(statisfy_trigger:))
    end
  }

  model.class_eval do
    after_commit on: [:destroy] do
      counter = instance_exec(&statisfy_counter)
      next unless counter.decrement_on_destroy? || counter.respond_to?(:on_destroy)

      instance_exec(:destroy, &trigger_event)
    end

    after_commit on: [event] do
      next unless instance_exec(&statisfy_counter).should_run?

      instance_exec(event, &trigger_event)
    end
  end
end

#catch_events(*event_names) ⇒ Object 



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# File 'lib/statisfy/subscriber.rb', line 8

def catch_events(*event_names)
  [*event_names].flatten.map do |event_name|
    model_and_event_from_event_name(event_name).tap do |model, event|
      append_callback_to_model(model, event)
      define_subject_method(model)
    end
  end
end

#define_subject_method(model) ⇒ Object 



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# File 'lib/statisfy/subscriber.rb', line 66

def define_subject_method(model)
  instance_name = model.name.underscore
  return if method_defined?(instance_name)

  define_method(instance_name) do
    model = instance_name.camelize.constantize
    @subject ||= @params.instance_of?(model) ? @params : model.find_by(id: params["id"])
  end
  alias_method :subject, instance_name
end

#model_and_event_from_event_name(event_name) ⇒ Object 



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# File 'lib/statisfy/subscriber.rb', line 51

def model_and_event_from_event_name(event_name)
  model_with_event = event_name.to_s.split("_")
  event = {
    "created": :create,
    "updated": :update,
    "destroyed": :destroy
  }[model_with_event.pop.to_sym]

  model_name = model_with_event.join("_").camelize

  [Object.const_get(model_name), event]
rescue NameError
  raise Statisfy::Error, "The model #{model_name} does not exist"
end