<?php

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
{
    /** @var callable|null */
    private $onEmpty = null;
    private $input = [];
    private $open = true;

    /**
     * Sets a callback that is called when the write buffer becomes empty.
     */
    public function onEmpty(callable $onEmpty = null)
    {
        $this->onEmpty = $onEmpty;
    }

    /**
     * Appends an input to the write buffer.
     *
     * @param resource|string|int|float|bool|\Traversable|null $input The input to append as scalar,
     *                                                                stream resource or \Traversable
     */
    public function write($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.
     */
    public function close()
    {
        $this->open = false;
    }

    /**
     * Tells whether the write buffer is closed or not.
     */
    public function isClosed()
    {
        return !$this->open;
    }

    /**
     * @return \Traversable<int, string>
     */
    #[\ReturnTypeWillChange]
    public function getIterator()
    {
        $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));
            }
        }
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NTk1MzAzODM2ODcxNzM2NSA1ODI4Mzg5OTEyNTM0MDM0IDI1MzM5MDc2NTM1MTc2Njk=