<?php
declare (strict_types=1);
namespace MailPoetVendor\Monolog\Handler;
if (!defined('ABSPATH')) exit;
use MailPoetVendor\Monolog\Logger;
class ProcessHandler extends AbstractProcessingHandler
{
private $process;
private $command;
private $cwd;
private $pipes = [];
protected const DESCRIPTOR_SPEC = [
0 => ['pipe', 'r'],
// STDIN is a pipe that the child will read from
1 => ['pipe', 'w'],
// STDOUT is a pipe that the child will write to
2 => ['pipe', 'w'],
];
public function __construct(string $command, $level = Logger::DEBUG, bool $bubble = \true, ?string $cwd = null)
{
if ($command === '') {
throw new \InvalidArgumentException('The command argument must be a non-empty string.');
}
if ($cwd === '') {
throw new \InvalidArgumentException('The optional CWD argument must be a non-empty string or null.');
}
parent::__construct($level, $bubble);
$this->command = $command;
$this->cwd = $cwd;
}
protected function write(array $record) : void
{
$this->ensureProcessIsStarted();
$this->writeProcessInput($record['formatted']);
$errors = $this->readProcessErrors();
if (empty($errors) === \false) {
throw new \UnexpectedValueException(\sprintf('Errors while writing to process: %s', $errors));
}
}
private function ensureProcessIsStarted() : void
{
if (\is_resource($this->process) === \false) {
$this->startProcess();
$this->handleStartupErrors();
}
}
private function startProcess() : void
{
$this->process = \proc_open($this->command, static::DESCRIPTOR_SPEC, $this->pipes, $this->cwd);
foreach ($this->pipes as $pipe) {
\stream_set_blocking($pipe, \false);
}
}
private function handleStartupErrors() : void
{
$selected = $this->selectErrorStream();
if (\false === $selected) {
throw new \UnexpectedValueException('Something went wrong while selecting a stream.');
}
$errors = $this->readProcessErrors();
if (\is_resource($this->process) === \false || empty($errors) === \false) {
throw new \UnexpectedValueException(\sprintf('The process "%s" could not be opened: ' . $errors, $this->command));
}
}
protected function selectErrorStream()
{
$empty = [];
$errorPipes = [$this->pipes[2]];
return \stream_select($errorPipes, $empty, $empty, 1);
}
protected function readProcessErrors() : string
{
return (string) \stream_get_contents($this->pipes[2]);
}
protected function writeProcessInput(string $string) : void
{
\fwrite($this->pipes[0], $string);
}
public function close() : void
{
if (\is_resource($this->process)) {
foreach ($this->pipes as $pipe) {
\fclose($pipe);
}
\proc_close($this->process);
$this->process = null;
}
}
}