<?php
Route::filter('administrator', function(){
    Auth::basic();

    if (!Auth::user()->isAdministrator) {
        throw new \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException();
    }
});

Route::filter('current_user', function(){
    Auth::basic();

    if (empty(Auth::user()) || Route::input('user') != Auth::user()->id) {
        throw new \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException();
    }
});