<?php

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namespace Guzzle\Plugin\Cache;

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use Guzzle\Common\Exception\InvalidArgumentException;

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use Guzzle\Http\Message\RequestInterface;

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use Guzzle\Http\Message\Response;

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/**

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* Determines if a request can be cached using a callback

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*/

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class CallbackCanCacheStrategy extends DefaultCanCacheStrategy

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{

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/** @var callable Callback for request */

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protected $requestCallback;

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/** @var callable Callback for response */

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protected $responseCallback;

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/**

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* @param \Closure|array|mixed $requestCallback Callable method to invoke for requests

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* @param \Closure|array|mixed $responseCallback Callable method to invoke for responses

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*

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* @throws InvalidArgumentException

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*/

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public function __construct($requestCallback = null, $responseCallback = null)

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{

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if ($requestCallback && !is_callable($requestCallback)) {

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throw new InvalidArgumentException('Method must be callable');

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}

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if ($responseCallback && !is_callable($responseCallback)) {

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throw new InvalidArgumentException('Method must be callable');

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}

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$this->requestCallback = $requestCallback;

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$this->responseCallback = $responseCallback;

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}

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public function canCacheRequest(RequestInterface $request)

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{

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return $this->requestCallback

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? call_user_func($this->requestCallback, $request)

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: parent::canCacheRequest($request);

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}

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public function canCacheResponse(Response $response)

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{

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return $this->responseCallback

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? call_user_func($this->responseCallback, $response)

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: parent::canCacheResponse($response);

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}

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}

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