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<?php |
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|
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/* |
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* This file is part of the Symfony package. |
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* |
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* (c) Fabien Potencier <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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|
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namespace Symfony\Component\Process; |
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|
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use Symfony\Component\Process\Exception\RuntimeException; |
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|
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/** |
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* Provides a way to continuously write to the input of a Process until the InputStream is closed. |
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* |
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* @author Nicolas Grekas <[email protected]> |
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* |
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* @implements \IteratorAggregate<int, string> |
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*/ |
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class InputStream implements \IteratorAggregate |
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{ |
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/** @var callable|null */ |
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private $onEmpty = null; |
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private $input = []; |
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private $open = true; |
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|
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/** |
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* Sets a callback that is called when the write buffer becomes empty. |
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*/ |
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public function onEmpty(?callable $onEmpty = null) |
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{ |
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$this->onEmpty = $onEmpty; |
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} |
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|
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/** |
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* Appends an input to the write buffer. |
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* |
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* @param resource|string|int|float|bool|\Traversable|null $input The input to append as scalar, |
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* stream resource or \Traversable |
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*/ |
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public function write($input) |
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{ |
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if (null === $input) { |
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return; |
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} |
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if ($this->isClosed()) { |
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throw new RuntimeException(sprintf('"%s" is closed.', static::class)); |
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} |
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$this->input[] = ProcessUtils::validateInput(__METHOD__, $input); |
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} |
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|
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/** |
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* Closes the write buffer. |
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*/ |
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public function close() |
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{ |
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$this->open = false; |
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} |
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|
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/** |
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* Tells whether the write buffer is closed or not. |
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*/ |
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public function isClosed() |
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{ |
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return !$this->open; |
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} |
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|
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/** |
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* @return \Traversable<int, string> |
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*/ |
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#[\ReturnTypeWillChange] |
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public function getIterator() |
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{ |
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$this->open = true; |
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|
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while ($this->open || $this->input) { |
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if (!$this->input) { |
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yield ''; |
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continue; |
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} |
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$current = array_shift($this->input); |
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|
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if ($current instanceof \Iterator) { |
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yield from $current; |
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} else { |
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yield $current; |
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} |
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if (!$this->input && $this->open && null !== $onEmpty = $this->onEmpty) { |
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$this->write($onEmpty($this)); |
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} |
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} |
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} |
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} |
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|
