Tipsy\Route::controller PHP Method

    public function controller()
    {
        if (!isset($this->_controllerRef)) {
            if (is_callable($this->_controller)) {
                $controller = new Controller(['closure' => $this->_controller, 'tipsy' => $this->tipsy()]);
                $this->_controllerRef = $controller;
            } elseif (is_object($this->_controller)) {
                $this->_controllerRef = $this->_controller;
                $this->_controllerRef->tipsy($this->tipsy());
            } elseif (is_string($this->_controller) && $this->tipsy()->controller($this->_controller)) {
                $this->_controllerRef = $this->tipsy()->controller($this->_controller);
            } elseif (is_string($this->_controller) && class_exists($this->_controller)) {
                $this->_controllerRef = new $this->_controller(['tipsy' => $this->tipsy()]);
            }
            if ($this->_controllerRef) {
                $this->_controllerRef->tipsy()->route($this);
            }
        }
        if (!$this->_controllerRef) {
            throw new Exception('No controller attached to route.');
        }
        return $this->_controllerRef;
    }