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<?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\Console\Output;
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use Symfony\Component\Console\Exception\InvalidArgumentException;
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use Symfony\Component\Console\Formatter\OutputFormatterInterface;
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/**
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* A BufferedOutput that keeps only the last N chars.
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*
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* @author Jérémy Derussé <jeremy@derusse.com>
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*/
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class TrimmedBufferOutput extends Output
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{
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private int $maxLength;
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private string $buffer = '';
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public function __construct(int $maxLength, ?int $verbosity = self::VERBOSITY_NORMAL, bool $decorated = false, OutputFormatterInterface $formatter = null)
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{
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if ($maxLength <= 0) {
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throw new InvalidArgumentException(sprintf('"%s()" expects a strictly positive maxLength. Got %d.', __METHOD__, $maxLength));
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}
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parent::__construct($verbosity, $decorated, $formatter);
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$this->maxLength = $maxLength;
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}
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/**
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* Empties buffer and returns its content.
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*/
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public function fetch(): string
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{
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$content = $this->buffer;
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$this->buffer = '';
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return $content;
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}
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protected function doWrite(string $message, bool $newline)
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{
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$this->buffer .= $message;
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if ($newline) {
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$this->buffer .= \PHP_EOL;
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}
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$this->buffer = substr($this->buffer, 0 - $this->maxLength);
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}
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}
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