c0323bd24b
* 4.1: fixed tests fixed CS fixed CS fixed CS fixed short array CS in comments fixed CS in ExpressionLanguage fixtures fixed CS in generated files fixed CS on generated container files fixed CS on Form PHP templates fixed CS on YAML fixtures fixed fixtures switched array() to []
91 lines
2.2 KiB
PHP
91 lines
2.2 KiB
PHP
<?php
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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 <fabien@symfony.com>
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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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namespace Symfony\Component\Process;
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use Symfony\Component\Process\Exception\RuntimeException;
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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 <p@tchwork.com>
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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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* 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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* 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__, $input);
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}
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/**
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* Closes the write buffer.
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*/
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public function close()
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{
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$this->open = false;
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}
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/**
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* 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 !$this->open;
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}
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public function getIterator()
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{
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$this->open = true;
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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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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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