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