40 lines
834 B
PHP
40 lines
834 B
PHP
<?php
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namespace Amp\ByteStream;
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use Amp\Promise;
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use Amp\Success;
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/**
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* Input stream with a single already known data chunk.
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*/
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final class InMemoryStream implements InputStream
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{
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private $contents;
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/**
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* @param string|null $contents Data chunk or `null` for no data chunk.
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*/
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public function __construct(string $contents = null)
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{
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$this->contents = $contents;
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}
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/**
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* Reads data from the stream.
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*
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* @return Promise<string|null> Resolves with the full contents or `null` if the stream has closed / already been consumed.
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*/
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public function read(): Promise
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{
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if ($this->contents === null) {
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return new Success;
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}
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$promise = new Success($this->contents);
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$this->contents = null;
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return $promise;
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}
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}
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