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<?php

    namespace Core;

    /**
     * Class LoginController contains functions for user (de)authentication.
     *
     * @hooks
     * <code>
     * ('on_userauth', ['user' => $user]) // Called just after the login session has been created {@see \Core\LoginController::login}
     * ('on_userdeauth', ['user' => Session::getUser()]) // Called just before destroying the login session. {@see \Core\LoginController::deauthenticateUser}
     * </code>
     * @package Core
     */
    abstract class AbstractClass {

        /**
         * @var CLASS Controller The class instance.
         * @internal
         */
        protected static $instance;

        /**
         * @var CLASS Model The instance of the model
         */
        protected $model;


        /**
         * Returns a LoginController instance, creating it if it did not exist.
         * @return bool CLASS Controller
         */
        final public static function singleton()
        {
            if (static::$instance === null) {
                $v = __CLASS__;

                static::$instance = new $v();// self();
            }

            return static::$instance;
        }

        /**
         * Returns the instance of the model for this controller
         * @return bool CLASS
         */
        final public function getModel() {
            return $this->model;
        }
    }