<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\App;

/**
* Request processing flag that allows to stop request dispatching in action controller from an observer
* Downside of this approach is temporal coupling and global communication.
* Will be deprecated when Action Component is decoupled.
*
* Please use plugins to prevent action dispatching instead.
*
* @api
* @since 100.0.2
*/
class ActionFlag
{
/**
* @var RequestInterface
*/
protected $_request;

/**
* @var array
*/
protected $_flags = [];

/**
* @param RequestInterface $request
*/
public function __construct(\Magento\Framework\App\RequestInterface $request)
{
$this->_request = $request;
}

/**
* Setting flag value
*
* @param string $action
* @param string $flag
* @param string $value
* @return void
*/
public function set($action, $flag, $value)
{
if ('' === $action) {
$action = $this->_request->getActionName();
}
$this->_flags[$this->_getControllerKey()][$action][$flag] = $value;
}

/**
* Retrieve flag value
*
* @param string $action
* @param string $flag
* @return bool
*
* @SuppressWarnings(PHPMD.BooleanGetMethodName)
*/
public function get($action, $flag = '')
{
if ('' === $action) {
$action = $this->_request->getActionName();
}
if ('' === $flag) {
return $this->_flags[$this->_getControllerKey()] ?? [];
} elseif (isset($this->_flags[$this->_getControllerKey()][$action][$flag])) {
return $this->_flags[$this->_getControllerKey()][$action][$flag];
} else {
return false;
}
}

/**
* Get controller key
*
* @return string
*/
protected function _getControllerKey()
{
return $this->_request->getRouteName() . '_' . $this->_request->getControllerName();
}
}