<?
/*
 * The idea is to have a full set of functionality, that I could use within all my projects for free
 * and transparently. Per project rewrites done only for the parts that has to be changed.
 * Otherwise use the defaults
 *
 * Make sure "Shared" parts are loaded I add this:
 */

<?
    #app/webroot/index.php
    App::uses('Dispatcher', 'Routing');

    App::build(array(
        'Controller' => array(ROOT . DS . 'cake/Share/Controller/'),
        'Model' => array(ROOT . DS . 'cake/Share/Model/'),
        'Plugin' => array(ROOT . DS . 'cake/',ROOT . DS . 'cake/Share/'),
        'View' => array(ROOT . DS . 'cake/Share/View/')
        ),APP::APPEND);

    CakePlugin::load('Share', array('path' => ROOT . DS . 'cake/Share/'));
?>

// To have e.g. shared Users Controller:

#path/Share/Controller/UsersController.php
<?php
# To prevent collisions prefix the controller
class SharedUsersController extends AppController {
    function login() {
        if (isset($this->data['User'])) {
            if ($this->Auth->login())
                $this->redirect($this->Auth->redirect());
           else
                $this->Session->setFlash(__('You failed'));
        }
    }

    function register() {/* Do something */}
    function remind(){/* Do something */}
}

# If no UsersController declared - declare.
if (!class_exists('UsersController')) {
    class UsersController extends SharedUsersController {}
}
?>

/*
 * At his point in any projects I could go to site.com/users/login
 * And it just works (TM)
 *
 * However if I what to have custom layout for login, just do:
 */
<?
var_dump(App::import('Controller', 'Share.Users'));

class UsersController extends SharedUsersController {
    function login() {
    $this->layout="fancy";
    parent::login();
   }
}

/*
 * Thats IT. All register/remind/etc functionality works as originally intended,
 * but login has new layout.
 */