<?php

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namespace YoastSEO_Vendor\GuzzleHttp;

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use YoastSEO_Vendor\GuzzleHttp\Promise as P;

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use YoastSEO_Vendor\GuzzleHttp\Promise\EachPromise;

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use YoastSEO_Vendor\GuzzleHttp\Promise\PromiseInterface;

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use YoastSEO_Vendor\GuzzleHttp\Promise\PromisorInterface;

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use YoastSEO_Vendor\Psr\Http\Message\RequestInterface;

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/**

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* Sends an iterator of requests concurrently using a capped pool size.

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*

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* The pool will read from an iterator until it is cancelled or until the

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* iterator is consumed. When a request is yielded, the request is sent after

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* applying the "request_options" request options (if provided in the ctor).

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*

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* When a function is yielded by the iterator, the function is provided the

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* "request_options" array that should be merged on top of any existing

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* options, and the function MUST then return a wait-able promise.

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*

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* @final

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*/

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class Pool implements \YoastSEO_Vendor\GuzzleHttp\Promise\PromisorInterface

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{

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/**

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* @var EachPromise

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*/

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private $each;

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/**

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* @param ClientInterface $client Client used to send the requests.

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* @param array|\Iterator $requests Requests or functions that return

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* requests to send concurrently.

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* @param array $config Associative array of options

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* - concurrency: (int) Maximum number of requests to send concurrently

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* - options: Array of request options to apply to each request.

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* - fulfilled: (callable) Function to invoke when a request completes.

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* - rejected: (callable) Function to invoke when a request is rejected.

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*/

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public function __construct(\YoastSEO_Vendor\GuzzleHttp\ClientInterface $client, $requests, array $config = [])

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{

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if (!isset($config['concurrency'])) {

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$config['concurrency'] = 25;

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}

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if (isset($config['options'])) {

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$opts = $config['options'];

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unset($config['options']);

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} else {

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$opts = [];

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}

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$iterable = \YoastSEO_Vendor\GuzzleHttp\Promise\Create::iterFor($requests);

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$requests = static function () use($iterable, $client, $opts) {

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foreach ($iterable as $key => $rfn) {

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if ($rfn instanceof \YoastSEO_Vendor\Psr\Http\Message\RequestInterface) {

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(yield $key => $client->sendAsync($rfn, $opts));

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} elseif (\is_callable($rfn)) {

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(yield $key => $rfn($opts));

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} else {

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throw new \InvalidArgumentException('Each value yielded by the iterator must be a Psr7\\Http\\Message\\RequestInterface or a callable that returns a promise that fulfills with a Psr7\\Message\\Http\\ResponseInterface object.');

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}

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}

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};

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$this->each = new \YoastSEO_Vendor\GuzzleHttp\Promise\EachPromise($requests(), $config);

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}

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/**

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* Get promise

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*/

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public function promise() : \YoastSEO_Vendor\GuzzleHttp\Promise\PromiseInterface

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{

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return $this->each->promise();

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}

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/**

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* Sends multiple requests concurrently and returns an array of responses

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* and exceptions that uses the same ordering as the provided requests.

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*

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* IMPORTANT: This method keeps every request and response in memory, and

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* as such, is NOT recommended when sending a large number or an

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* indeterminate number of requests concurrently.

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*

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* @param ClientInterface $client Client used to send the requests

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* @param array|\Iterator $requests Requests to send concurrently.

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* @param array $options Passes through the options available in

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* {@see \GuzzleHttp\Pool::__construct}

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*

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* @return array Returns an array containing the response or an exception

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* in the same order that the requests were sent.

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*

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* @throws \InvalidArgumentException if the event format is incorrect.

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*/

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public static function batch(\YoastSEO_Vendor\GuzzleHttp\ClientInterface $client, $requests, array $options = []) : array

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{

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$res = [];

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self::cmpCallback($options, 'fulfilled', $res);

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self::cmpCallback($options, 'rejected', $res);

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$pool = new static($client, $requests, $options);

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$pool->promise()->wait();

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\ksort($res);

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return $res;

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}

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/**

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* Execute callback(s)

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*/

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private static function cmpCallback(array &$options, string $name, array &$results) : void

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{

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if (!isset($options[$name])) {

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$options[$name] = static function ($v, $k) use(&$results) {

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$results[$k] = $v;

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};

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} else {

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$currentFn = $options[$name];

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$options[$name] = static function ($v, $k) use(&$results, $currentFn) {

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$currentFn($v, $k);

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$results[$k] = $v;

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};

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}

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}

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}

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