Noosfero/noosfero

class ActivityPresenter < Presenter
  def self.base_class
    ActionTracker::Record
  end

  def self.available?(instance)
    instance.kind_of?(ActionTracker::Record) || instance.kind_of?(ProfileActivity)
  end

  def self.target(instance)
    if instance.kind_of?(ProfileActivity)
      target(instance.activity)
    elsif instance.kind_of?(ActionTracker::Record)
      instance.target
    else
      instance
    end
  end

  def self.owner(instance)
    instance.kind_of?(ProfileActivity) ? instance.profile : instance.user
  end

  def target
    self.class.target(encapsulated_instance)
  end

  def owner
    self.class.owner(encapsulated_instance)
  end

  def hidden_for?(user)
    (target.respond_to?(:display_to?) &&
    !target.display_to?(user)) ||
      !target_profile.display_to?(user, :wall) ||
      !target_profile.allow_followers?
  end

  def involved?(user)
    owner == user || target == user
  end

  private

    def target_profile
      if target.is_a? Profile
        target
      elsif target.is_a? Article
        target.profile
      elsif target.is_a? Scrap
        target.receiver
      else
        owner
      end
    end
end

# Preload ActivityPresenter subclasses to allow `Presenter.for()` to work
Dir.glob(File.join("app", "presenters", "activity", "*.rb")) do |file|
  load file
end