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<?php

/*
 * This file is part of the Monolog package.
 *
 * (c) Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Monolog\Handler;

use Monolog\Logger;
use Monolog\Handler\SyslogUdp\UdpSocket;

/**
 * A Handler for logging to a remote syslogd server.
 *
 * @author Jesper Skovgaard Nielsen <nulpunkt@gmail.com>
 * @author Dominik Kukacka <dominik.kukacka@gmail.com>
 */
class SyslogUdpHandler extends AbstractSyslogHandler
{
    const RFC3164 = 0;
    const RFC5424 = 1;

private $dateFormats = array(
        self::RFC3164 => 'M d H:i:s',
        self::RFC5424 => \DateTime::RFC3339,
    );

protected $socket;
    protected $ident;
    protected $rfc;

/**
     * @param string $host
     * @param int    $port
     * @param mixed  $facility
     * @param int    $level    The minimum logging level at which this handler will be triggered
     * @param bool   $bubble   Whether the messages that are handled can bubble up the stack or not
     * @param string $ident    Program name or tag for each log message.
     * @param int    $rfc      RFC to format the message for.
     */
    public function __construct($host, $port = 514, $facility = LOG_USER, $level = Logger::DEBUG, $bubble = true, $ident = 'php', $rfc = self::RFC5424)
    {
        parent::__construct($facility, $level, $bubble);

$this->ident = $ident;
        $this->rfc = $rfc;

$this->socket = new UdpSocket($host, $port ?: 514);
    }

protected function write(array $record)
    {
        $lines = $this->splitMessageIntoLines($record['formatted']);

$header = $this->makeCommonSyslogHeader($this->logLevels[$record['level']]);

foreach ($lines as $line) {
            $this->socket->write($line, $header);
        }
    }

public function close()
    {
        $this->socket->close();
    }

private function splitMessageIntoLines($message)
    {
        if (is_array($message)) {
            $message = implode("\n", $message);
        }

return preg_split('/$\R?^/m', $message, -1, PREG_SPLIT_NO_EMPTY);
    }

/**
     * Make common syslog header (see rfc5424 or rfc3164)
     */
    protected function makeCommonSyslogHeader($severity)
    {
        $priority = $severity + $this->facility;

if (!$pid = getmypid()) {
            $pid = '-';
        }

if (!$hostname = gethostname()) {
            $hostname = '-';
        }

$date = $this->getDateTime();

if ($this->rfc === self::RFC3164) {
            return "<$priority>" .
                $date . " " .
                $hostname . " " .
                $this->ident . "[" . $pid . "]: ";
        } else {
            return "<$priority>1 " .
                $date . " " .
                $hostname . " " .
                $this->ident . " " .
                $pid . " - - ";
        }
    }

protected function getDateTime()
    {
        return date($this->dateFormats[$this->rfc]);
    }

/**
     * Inject your own socket, mainly used for testing
     */
    public function setSocket($socket)
    {
        $this->socket = $socket;
    }
}