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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Log
  * @subpackage Writer
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /** Zend_Log */
 // require_once 'Zend/Log.php';
 
 /** Zend_Log_Writer_Abstract */
 // require_once 'Zend/Log/Writer/Abstract.php';
 
 /**
  * Writes log messages to syslog
  *
  * @category   Zend
  * @package    Zend_Log
  * @subpackage Writer
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Log_Writer_Syslog extends Zend_Log_Writer_Abstract
 {
     /**
      * Maps Zend_Log priorities to PHP's syslog priorities
      *
      * @var array
      */
     protected $_priorities = array(
         Zend_Log::EMERG  => LOG_EMERG,
         Zend_Log::ALERT  => LOG_ALERT,
         Zend_Log::CRIT   => LOG_CRIT,
         Zend_Log::ERR    => LOG_ERR,
         Zend_Log::WARN   => LOG_WARNING,
         Zend_Log::NOTICE => LOG_NOTICE,
         Zend_Log::INFO   => LOG_INFO,
         Zend_Log::DEBUG  => LOG_DEBUG,
     );
 
     /**
      * The default log priority - for unmapped custom priorities
      *
      * @var string
      */
     protected $_defaultPriority = LOG_NOTICE;
 
     /**
      * Last application name set by a syslog-writer instance
      *
      * @var string
      */
     protected static $_lastApplication;
 
     /**
      * Last facility name set by a syslog-writer instance
      *
      * @var string
      */
     protected static $_lastFacility;
 
     /**
      * Application name used by this syslog-writer instance
      *
      * @var string
      */
     protected $_application = 'Zend_Log';
 
     /**
      * Facility used by this syslog-writer instance
      *
      * @var int
      */
     protected $_facility = LOG_USER;
 
     /**
      * Types of program available to logging of message
      *
      * @var array
      */
     protected $_validFacilities = array();
 
     /**
      * Class constructor
      *
      * @param  array $params Array of options; may include "application" and "facility" keys
      * @return void
      */
     public function __construct(array $params = array())
     {
         if (isset($params['application'])) {
             $this->_application = $params['application'];
         }
 
         $runInitializeSyslog = true;
         if (isset($params['facility'])) {
             $this->setFacility($params['facility']);
             $runInitializeSyslog = false;
         }
 
         if ($runInitializeSyslog) {
             $this->_initializeSyslog();
         }
     }
 
     /**
      * Create a new instance of Zend_Log_Writer_Syslog
      *
      * @param  array|Zend_Config $config
      * @return Zend_Log_Writer_Syslog
      */
     static public function factory($config)
     {
         return new self(self::_parseConfig($config));
     }
 
     /**
      * Initialize values facilities
      *
      * @return void
      */
     protected function _initializeValidFacilities()
     {
         $constants = array(
             'LOG_AUTH',
             'LOG_AUTHPRIV',
             'LOG_CRON',
             'LOG_DAEMON',
             'LOG_KERN',
             'LOG_LOCAL0',
             'LOG_LOCAL1',
             'LOG_LOCAL2',
             'LOG_LOCAL3',
             'LOG_LOCAL4',
             'LOG_LOCAL5',
             'LOG_LOCAL6',
             'LOG_LOCAL7',
             'LOG_LPR',
             'LOG_MAIL',
             'LOG_NEWS',
             'LOG_SYSLOG',
             'LOG_USER',
             'LOG_UUCP'
         );
 
         foreach ($constants as $constant) {
             if (defined($constant)) {
                 $this->_validFacilities[] = constant($constant);
             }
         }
     }
 
     /**
      * Initialize syslog / set application name and facility
      *
      * @return void
      */
     protected function _initializeSyslog()
     {
         self::$_lastApplication = $this->_application;
         self::$_lastFacility    = $this->_facility;
         openlog($this->_application, LOG_PID, $this->_facility);
     }
 
     /**
      * Set syslog facility
      *
      * @param  int $facility Syslog facility
      * @return Zend_Log_Writer_Syslog
      * @throws Zend_Log_Exception for invalid log facility
      */
     public function setFacility($facility)
     {
         if ($this->_facility === $facility) {
             return $this;
         }
 
         if (!count($this->_validFacilities)) {
             $this->_initializeValidFacilities();
         }
 
         if (!in_array($facility, $this->_validFacilities)) {
             // require_once 'Zend/Log/Exception.php';
             throw new Zend_Log_Exception('Invalid log facility provided; please see http://php.net/openlog for a list of valid facility values');
         }
 
         if ('WIN' == strtoupper(substr(PHP_OS, 0, 3))
             && ($facility !== LOG_USER)
         ) {
             // require_once 'Zend/Log/Exception.php';
             throw new Zend_Log_Exception('Only LOG_USER is a valid log facility on Windows');
         }
 
         $this->_facility = $facility;
         $this->_initializeSyslog();
         return $this;
     }
 
     /**
      * Set application name
      *
      * @param  string $application Application name
      * @return Zend_Log_Writer_Syslog
      */
     public function setApplicationName($application)
     {
         if ($this->_application === $application) {
             return $this;
         }
         $this->_application = $application;
         $this->_initializeSyslog();
         return $this;
     }
 
     /**
      * Close syslog.
      *
      * @return void
      */
     public function shutdown()
     {
         closelog();
     }
 
     /**
      * Write a message to syslog.
      *
      * @param  array $event event data
      * @return void
      */
     protected function _write($event)
     {
         if (array_key_exists($event['priority'], $this->_priorities)) {
             $priority = $this->_priorities[$event['priority']];
         } else {
             $priority = $this->_defaultPriority;
         }
 
         if ($this->_application !== self::$_lastApplication
             || $this->_facility !== self::$_lastFacility)
         {
             $this->_initializeSyslog();
         }
 
         $message = $event['message'];
         if ($this->_formatter instanceof Zend_Log_Formatter_Interface) {
             $message = $this->_formatter->format($event);
         }
 
         syslog($priority, $message);
     }
 }