module RoutableActions extend ActiveSupport::Concern def find_routable!(routable_klass, requested_full_path, extra_authorization_proc: nil) routable = routable_klass.find_by_full_path(requested_full_path, follow_redirects: request.get?) if routable_authorized?(routable, extra_authorization_proc) ensure_canonical_path(routable, requested_full_path) routable else route_not_found nil end end def routable_authorized?(routable, extra_authorization_proc) action = :"read_#{routable.class.to_s.underscore}" return false unless can?(current_user, action, routable) if extra_authorization_proc extra_authorization_proc.call(routable) else true end end def ensure_canonical_path(routable, requested_full_path) return unless request.get? canonical_path = routable.full_path if canonical_path != requested_full_path if canonical_path.casecmp(requested_full_path) != 0 flash[:notice] = "#{routable.class.to_s.titleize} '#{requested_full_path}' was moved to '#{canonical_path}'. Please update any links and bookmarks that may still have the old path." end redirect_to build_canonical_path(routable) end end end