<?php

declare (strict_types=1);
namespace OCA\News\Vendor\GuzzleHttp\Psr7;

use OCA\News\Vendor\Psr\Http\Message\StreamInterface;
/**
 * Stream decorator that begins dropping data once the size of the underlying
 * stream becomes too full.
 */
final class DroppingStream implements StreamInterface
{
    use StreamDecoratorTrait;
    use NonSerializableStreamTrait;
    private int $maxLength;
    private StreamInterface $stream;
    /**
     * @param StreamInterface $stream    Underlying stream to decorate.
     * @param int             $maxLength Maximum size before dropping data.
     */
    public function __construct(StreamInterface $stream, int $maxLength)
    {
        $this->stream = $stream;
        $this->maxLength = Integers::assertNonNegativeInteger($maxLength, 'Maximum length');
    }
    public function write(string $string): int
    {
        $diff = $this->maxLength - $this->stream->getSize();
        // Begin returning 0 when the underlying stream is too large.
        if ($diff <= 0) {
            return 0;
        }
        // Write the stream or a subset of the stream if needed.
        if (strlen($string) < $diff) {
            return $this->stream->write($string);
        }
        return $this->stream->write(substr($string, 0, $diff));
    }
}
