44 lines
1.5 KiB
PHP
44 lines
1.5 KiB
PHP
<?php
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namespace WP_Ultimo\Dependencies\Amp\ByteStream\Base64;
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use WP_Ultimo\Dependencies\Amp\ByteStream\OutputStream;
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use WP_Ultimo\Dependencies\Amp\ByteStream\StreamException;
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use WP_Ultimo\Dependencies\Amp\Failure;
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use WP_Ultimo\Dependencies\Amp\Promise;
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final class Base64DecodingOutputStream implements OutputStream
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{
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/** @var OutputStream */
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private $destination;
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/** @var string */
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private $buffer = '';
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/** @var int */
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private $offset = 0;
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public function __construct(OutputStream $destination)
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{
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$this->destination = $destination;
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}
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public function write(string $data) : Promise
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{
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$this->buffer .= $data;
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$length = \strlen($this->buffer);
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$chunk = \base64_decode(\substr($this->buffer, 0, $length - $length % 4), \true);
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if ($chunk === \false) {
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return new Failure(new StreamException('Invalid base64 near offset ' . $this->offset));
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}
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$this->offset += $length - $length % 4;
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$this->buffer = \substr($this->buffer, $length - $length % 4);
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return $this->destination->write($chunk);
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}
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public function end(string $finalData = "") : Promise
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{
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$this->offset += \strlen($this->buffer);
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$chunk = \base64_decode($this->buffer . $finalData, \true);
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if ($chunk === \false) {
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return new Failure(new StreamException('Invalid base64 near offset ' . $this->offset));
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}
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$this->buffer = '';
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return $this->destination->end($chunk);
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}
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}
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