DroppingStream.php — SureCart – Ecommerce Made Easy For Selling Physical Products, Digital Downloads, Subscriptions, Donations, & Payments 4.6.4

surecart / vendor / guzzlehttp / psr7 / src / DroppingStream.php

surecart / vendor / guzzlehttp / psr7 / src Last commit date

DroppingStream.php

50 lines

1	<?php
2
3	declare(strict_types=1);
4
5	namespace SureCartVendors\GuzzleHttp\Psr7;
6
7	use SureCartVendors\Psr\Http\Message\StreamInterface;
8
9	/**
10	* Stream decorator that begins dropping data once the size of the underlying
11	* stream becomes too full.
12	*/
13	final class DroppingStream implements StreamInterface
14	{
15	use StreamDecoratorTrait;
16
17	/** @var int */
18	private $maxLength;
19
20	/** @var StreamInterface */
21	private $stream;
22
23	/**
24	* @param StreamInterface $stream Underlying stream to decorate.
25	* @param int $maxLength Maximum size before dropping data.
26	*/
27	public function __construct(StreamInterface $stream, int $maxLength)
28	{
29	$this->stream = $stream;
30	$this->maxLength = $maxLength;
31	}
32
33	public function write($string): int
34	{
35	$diff = $this->maxLength - $this->stream->getSize();
36
37	// Begin returning 0 when the underlying stream is too large.
38	if ($diff <= 0) {
39	return 0;
40	}
41
42	// Write the stream or a subset of the stream if needed.
43	if (strlen($string) < $diff) {
44	return $this->stream->write($string);
45	}
46
47	return $this->stream->write(substr($string, 0, $diff));
48	}
49	}
50