class Ability
  include CanCan::Ability

  def initialize(user)
    clear_aliased_actions

    user ||= User.new

    if user.persisted?
      can :display, Cdao::Jurisprudence

      can :manage, :all

      cannot :update, Cdao::Jurisprudence

      cannot :destroy, Cdao::Jurisprudence
      cannot :destroy, Cdao::Library
      cannot :destroy, Cdao::LibrarySubject
      cannot :destroy, Cdao::Subject
    end
  end

  def clear_aliased_actions
    super

    # override cancan default aliasing (we don't want to differentiate
    # between read and index)
    alias_action :destroy, to: :delete
    alias_action :edit, to: :update
    alias_action :new, to: :create
    alias_action :show, to: :read
    alias_action :search, to: :index
    alias_action :index, :read, to: :display
    alias_action :create, :update, to: :modify
    alias_action :display, :modify, to: :basic_manage
  end
end