40 lines
929 B
PHP
40 lines
929 B
PHP
<?php
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namespace Amp\ByteStream\Base64;
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use Amp\ByteStream\OutputStream;
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use Amp\Promise;
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final class Base64EncodingOutputStream 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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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_encode(\substr($this->buffer, 0, $length - $length % 3));
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$this->buffer = \substr($this->buffer, $length - $length % 3);
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return $this->destination->write($chunk);
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}
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public function end(string $finalData = ""): Promise
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{
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$chunk = \base64_encode($this->buffer . $finalData);
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$this->buffer = '';
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return $this->destination->end($chunk);
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}
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}
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