<?php

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/*

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* This file is part of the ManageWP Worker plugin.

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*

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* (c) ManageWP LLC <contact@managewp.com>

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*

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* For the full copyright and license information, please view the LICENSE

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* file that was distributed with this source code.

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*/

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class MWP_Worker_RequestStack

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{

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/**

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* @var MWP_Worker_Request[]

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*/

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private $requests = array();

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/**

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* Pushes a Request on the stack.

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*

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* This method should generally not be called directly as the stack

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* management should be taken care of by the application itself.

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*/

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public function push(MWP_Worker_Request $request)

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{

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$this->requests[] = $request;

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}

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/**

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* Pops the current request from the stack.

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*

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* This operation lets the current request go out of scope.

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*

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* This method should generally not be called directly as the stack

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* management should be taken care of by the application itself.

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*

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* @return MWP_Worker_Request|null

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*/

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public function pop()

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{

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if (!$this->requests) {

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return null;

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}

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return array_pop($this->requests);

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}

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/**

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* @return MWP_Worker_Request|null

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*/

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public function getCurrentRequest()

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{

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$lastRequest = end($this->requests);

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return $lastRequest ? $lastRequest : null;

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}

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/**

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* Gets the master Request.

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*

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* @return MWP_Worker_Request|null

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*/

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public function getMasterRequest()

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{

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if (!$this->requests) {

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return null;

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}

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return $this->requests[0];

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}

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/**

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* Returns the parent request of the current.

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*

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* If current Request is the master request, it returns null.

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*

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* @return MWP_Worker_Request|null

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*/

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public function getParentRequest()

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{

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$pos = count($this->requests) - 2;

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if (!isset($this->requests[$pos])) {

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return null;

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}

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return $this->requests[$pos];

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}

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}

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