lib/pres/presents.rb
def present(object, presenter: nil, **args)
      if object.respond_to?(:to_ary)
        object.map { |item| present(item, presenter: presenter, **args) }
      else
        presenter ||= presenter_klass(object)
        wrapper = presenter.new(object, view_context, **args)
        block_given? ? yield(wrapper) : wrapper
      end
    end
def present(object, presenter: nil, **args)
      if object.respond_to?(:to_ary)
        object.map { |item| present(item, presenter: presenter, **args) }
      else
        presenter ||= presenter_klass(object)
        wrapper = presenter.new(object, view_context, **args)
        block_given? ? yield(wrapper) : wrapper
      end
    end
Wrap an object or collection of objects with a presenter class.

 object    - A ruby object. May be nil.
 presenter - A Presenter class (optional)
 args      - optional hash / kwargs passed to the presenter

 An instance of a presenter class is created. The class is
 one of the following:
 - the `presenter` argument
 - `Pres::Presenter` if object is nil
 - object.presenter_class (if that method is defined)
 - the default presenter class for the object
   (for example: User -> UserPresenter)

 Examples

 user = User.new
 present(user, cool: true)
 => #<UserPresenter object: #<User> ...>

 user = User.new
 present(user) do |up|
   up.something
 end
 up => #<UserPresenter object: #<User> ...>

 user = User.new
 present(user, presenter: NiceUserPresenter, cool: true)
 => #<NiceUserPresenter object: #<User> ...>

 class User
   def presenter_class
     MyPresenter
   end
 end
 user = User.new
 present(user)
 => #<MyPresenter object: #<User> ...>

 present([user])
 => [#<UserPresenter object: #<User> ...>]

 present(nil)
 => [#<Presenter object: nil ...>]

 Returns a new Presenter object or array of new Presenter objects
 Yields a new Presenter object if a block is given