TimeZoneDAO.inc.php

<?php
 
class TimeZoneDAO extends DAO {
   var $cache;
 
   function __construct() {
      // Parent constructor intentionally not called
   }
 
   function getFilename() {
      return "lib/pkp/registry/timeZones.xml";
   }
 
   function &_getTimeZoneCache() {
      $cache =& Registry::get('allTimeZones', true, null);
      if ($cache === null) {
         $cacheManager = CacheManager::getManager();
         $cache = $cacheManager->getFileCache(
            'timeZone', 'list',
            array($this, '_timeZoneCacheMiss')
         );
 
         // Check to see if the data is outdated
         $cacheTime = $cache->getCacheTime();
         if ($cacheTime !== null && $cacheTime < filemtime($this->getFilename())) {
            $cache->flush();
         }
      }
      return $cache;
   }
 
   function _timeZoneCacheMiss($cache, $id) {
      $timeZones =& Registry::get('allTimeZonesData', true, null);
      if ($timeZones === null) {
         // Reload time zone registry file
         $xmlDao = new XMLDAO();
         $data = $xmlDao->parseStruct($this->getFilename(), array('timezones', 'entry'));
         $timeZones = array();
         if (isset($data['timezones'])) {
            foreach ($data['entry'] as $timeZoneData) {
               $timeZones[$timeZoneData['attributes']['key']] = $timeZoneData['attributes']['name'];
            }
         }
         asort($timeZones);
         $cache->setEntireCache($timeZones);
      }
      return null;
   }
 
   function &getTimeZones() {
      $cache =& $this->_getTimeZoneCache();
      return $cache->getContents();
   }
}