What is the equivalent of Mage::app() in magento 2, like Magento 1?

Question

I am Migrating a website from Magento 1 to Magento 2. In Magento 1, I was using

<?php $isReviewScreen = Mage::app()->getFrontController()->getRequest()->getRouteName() == 'review'; ?>

I am trying to get the equivalent of this code in magento 2? Please help me to do it.

Thanks

Answer 1

you can get directly in controller

$this->getRequest()->getRouteName();

or phtml file

$this->getRequest()->getRouteName();

Answer 2

public function __construct(
        \Magento\Framework\App\RequestInterface $request,
        array $data = []
    ) {
        $this->_request = $request;
        parent::__construct($data);
    }

public function getroute(){
    $this->_request->getRouteName();
 }

You can also get Controller name, action name using below method in template file directly,

$this->getRequest()->getRouteName(),
$this->getRequest()->getControllerName(),
$this->getRequest()->getActionName(),

If you want to get inside Observer file you have to create __construct() method and set RequestInterface.