module OrbitModel

  module Authorizable

    def self.included(base)
      base.class_eval do
        has_one :auth_approval, as: :approval_authorizable, dependent: :destroy
        has_one :auth_sub_manager, as: :sub_manager_authorizable, dependent: :destroy
        delegate :authorized_users, to: :auth_approval, prefix: true, allow_nil: true
        delegate :authorized_users, to: :auth_manager, prefix: true, allow_nil: true
        delegate :authorized_users, to: :auth_sub_manager, prefix: true, allow_nil: true
        send :include, InstanceMethods
      end
    end

    module InstanceMethods

    	# Normal case
    	# Use of categories to define approval and sub-manager
	    def approval_users
	    	auth_approval_authorized_users
	    end

	    def sub_managers
	    	auth_sub_manager_authorized_users
	    end

    	def user_can_approve?(user)
    		approval_users.include?(user) if approval_users
    	end

    	def user_can_sub_manage?(user)
    		sub_managers.include?(user) if sub_managers
    	end

    	# Specific case
    	# Approval or sub-manager is defined on something else than categories
	    def authorized_users_by_title(title)
	    	return approval_users if auth_approval && auth_approval.title.eql?(title)
	    	return sub_managers if auth_sub_manager && auth_sub_manager.title.eql?(title)
	    end

	    def get_authorization_by_title(title)
	    	return auth_approval if auth_approval && auth_approval.title.eql?(title)
	    	return auth_sub_manager if auth_sub_manager && auth_sub_manager.title.eql?(title)
	    end

    	def user_is_authorized_by_title?(user, title)
    		authorized_users_by_title(title).include?(user)
    	end

    end
    
  end

end