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139 lines
3.9 KiB
PHP
139 lines
3.9 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* @copyright Copyright (c) 2023, Joas Schilling <coding@schilljs.com>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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namespace OC\Http\Client;
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use Exception;
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use GuzzleHttp\Exception\RequestException;
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use GuzzleHttp\Promise\PromiseInterface;
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use LogicException;
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use OCP\Http\Client\IPromise;
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use OCP\Http\Client\IResponse;
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use Psr\Http\Message\ResponseInterface;
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use Psr\Log\LoggerInterface;
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/**
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* A wrapper around Guzzle's PromiseInterface
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*
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* @see \GuzzleHttp\Promise\PromiseInterface
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* @since 28.0.0
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*/
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class GuzzlePromiseAdapter implements IPromise {
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public function __construct(
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protected PromiseInterface $promise,
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protected LoggerInterface $logger,
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) {
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}
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/**
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* Appends fulfillment and rejection handlers to the promise, and returns
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* a new promise resolving to the return value of the called handler.
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*
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* @param ?callable(IResponse): void $onFulfilled Invoked when the promise fulfills. Gets an \OCP\Http\Client\IResponse passed in as argument
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* @param ?callable(Exception): void $onRejected Invoked when the promise is rejected. Gets an \Exception passed in as argument
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*
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* @return IPromise
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* @since 28.0.0
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*/
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public function then(
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?callable $onFulfilled = null,
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?callable $onRejected = null,
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): IPromise {
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if ($onFulfilled !== null) {
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$wrappedOnFulfilled = static function (ResponseInterface $response) use ($onFulfilled) {
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$onFulfilled(new Response($response));
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};
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} else {
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$wrappedOnFulfilled = null;
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}
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if ($onRejected !== null) {
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$wrappedOnRejected = static function (RequestException $e) use ($onRejected) {
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$onRejected($e);
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};
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} else {
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$wrappedOnRejected = null;
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}
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$this->promise->then($wrappedOnFulfilled, $wrappedOnRejected);
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return $this;
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}
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/**
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* Get the state of the promise ("pending", "rejected", or "fulfilled").
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*
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* The three states can be checked against the constants defined:
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* STATE_PENDING, STATE_FULFILLED, and STATE_REJECTED.
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*
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* @return IPromise::STATE_*
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* @since 28.0.0
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*/
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public function getState(): string {
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$state = $this->promise->getState();
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if ($state === PromiseInterface::FULFILLED) {
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return self::STATE_FULFILLED;
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}
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if ($state === PromiseInterface::REJECTED) {
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return self::STATE_REJECTED;
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}
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if ($state === PromiseInterface::PENDING) {
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return self::STATE_PENDING;
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}
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$this->logger->error('Unexpected promise state "{state}" returned by Guzzle', [
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'state' => $state,
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]);
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return self::STATE_PENDING;
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}
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/**
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* Cancels the promise if possible.
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*
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* @link https://github.com/promises-aplus/cancellation-spec/issues/7
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* @since 28.0.0
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*/
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public function cancel(): void {
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$this->promise->cancel();
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}
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/**
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* Waits until the promise completes if possible.
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*
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* Pass $unwrap as true to unwrap the result of the promise, either
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* returning the resolved value or throwing the rejected exception.
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*
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* If the promise cannot be waited on, then the promise will be rejected.
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*
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* @param bool $unwrap
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*
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* @return mixed
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*
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* @throws LogicException if the promise has no wait function or if the
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* promise does not settle after waiting.
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* @since 28.0.0
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*/
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public function wait(bool $unwrap = true): mixed {
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return $this->promise->wait($unwrap);
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}
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}
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