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✏️ Editing: AmpBody.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\HttpClient\Internal;

use Amp\ByteStream\InputStream;
use Amp\ByteStream\ResourceInputStream;
use Amp\Http\Client\RequestBody;
use Amp\Promise;
use Amp\Success;
use Symfony\Component\HttpClient\Exception\TransportException;

/**
 * @author Nicolas Grekas <p@tchwork.com>
 *
 * @internal
 */
class AmpBody implements RequestBody, InputStream
{
    private ResourceInputStream|\Closure|string $body;
    private array $info;
    private \Closure $onProgress;
    private ?int $offset = 0;
    private int $length = -1;
    private ?int $uploaded = null;

/**
     * @param \Closure|resource|string $body
     */
    public function __construct($body, &$info, \Closure $onProgress)
    {
        $this->info = &$info;
        $this->onProgress = $onProgress;

if (\is_resource($body)) {
            $this->offset = ftell($body);
            $this->length = fstat($body)['size'];
            $this->body = new ResourceInputStream($body);
        } elseif (\is_string($body)) {
            $this->length = \strlen($body);
            $this->body = $body;
        } else {
            $this->body = $body;
        }
    }

public function createBodyStream(): InputStream
    {
        if (null !== $this->uploaded) {
            $this->uploaded = null;

if (\is_string($this->body)) {
                $this->offset = 0;
            } elseif ($this->body instanceof ResourceInputStream) {
                fseek($this->body->getResource(), $this->offset);
            }
        }

return $this;
    }

public function getHeaders(): Promise
    {
        return new Success([]);
    }

public function getBodyLength(): Promise
    {
        return new Success($this->length - $this->offset);
    }

public function read(): Promise
    {
        $this->info['size_upload'] += $this->uploaded;
        $this->uploaded = 0;
        ($this->onProgress)();

$chunk = $this->doRead();
        $chunk->onResolve(function ($e, $data) {
            if (null !== $data) {
                $this->uploaded = \strlen($data);
            } else {
                $this->info['upload_content_length'] = $this->info['size_upload'];
            }
        });

return $chunk;
    }

public static function rewind(RequestBody $body): RequestBody
    {
        if (!$body instanceof self) {
            return $body;
        }

$body->uploaded = null;

if ($body->body instanceof ResourceInputStream) {
            fseek($body->body->getResource(), $body->offset);

return new $body($body->body, $body->info, $body->onProgress);
        }

if (\is_string($body->body)) {
            $body->offset = 0;
        }

return $body;
    }

private function doRead(): Promise
    {
        if ($this->body instanceof ResourceInputStream) {
            return $this->body->read();
        }

if (null === $this->offset || !$this->length) {
            return new Success();
        }

if (\is_string($this->body)) {
            $this->offset = null;

return new Success($this->body);
        }

if ('' === $data = ($this->body)(16372)) {
            $this->offset = null;

return new Success();
        }

if (!\is_string($data)) {
            throw new TransportException(sprintf('Return value of the "body" option callback must be string, "%s" returned.', get_debug_type($data)));
        }

return new Success($data);
    }
}

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