mirror of
https://github.com/EGroupware/egroupware.git
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248 lines
7.8 KiB
PHP
248 lines
7.8 KiB
PHP
<?php
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/**
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* eGroupWare - Calendar's timezone information
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*
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* Timezone information get imported from SQLite database, "borrowed" of Lighting TB extension.
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*
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* @link http://www.egroupware.org
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* @package calendar
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* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
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* @copyright (c) 2009 by RalfBecker-At-outdoor-training.de
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @version $Id$
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*/
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/**
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* Class for timezone information
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*
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* This class serves two purposes:
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* - convert between TZID strings and nummeric tz_id's stored in database
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* - get iCal VTIMEZONE component for a TZID (data from Lighting extension)
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*
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* Recommendations about timezone handling in calendars:
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* @link http://www.calconnect.org/publications/icalendartimezoneproblemsandrecommendationsv1.0.pdf
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*
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* Mapping Windows timezone to standard TZID's:
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* @link http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/windows_tzid.html
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*/
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class calendar_timezones
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{
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/**
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* Methods callable via menuation
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*
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* @var array
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*/
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public $public_functions = array(
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'update' => true,
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);
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/**
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* Name of timezone table
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*/
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const TABLE = 'egw_cal_timezones';
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/**
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* Cached timezone data (reference to session created by init_static)
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*
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* @var array id => data
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*/
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protected static $tz_cache = array();
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/**
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* Cached timezone data (reference to session created by init_static)
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*
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* @var array tzid => id
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*/
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protected static $tz2id = array();
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/**
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* Get the nummeric id (or other data) for a given TZID
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*
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* Examples:
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* - calendar_timezone::tz2id('Europe/Berlin') returns nummeric id for given TZID
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* - calendar_timezone::tz2id('Europe/Berlin','component') returns VTIMEZONE component for given TZID
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*
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* @param string $tzid TZID
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* @param string $what='id' what to return, default id, null for whole array
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* @return int tz_id or null if not found
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*/
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public static function tz2id($tzid,$what='id')
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{
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$id =& self::$tz2id[$tzid];
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if (!isset($id))
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{
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if (($data = $GLOBALS['egw']->db->select(self::TABLE,'*',array(
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'tz_tzid' => $tzid,
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),__LINE__,__FILE__,false,'','calendar')->fetch()))
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{
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$id = $data['tz_id'];
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self::$tz_cache[$id] = egw_db::strip_array_keys($data,'tz_');
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}
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}
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if (isset($id) && $what != 'id')
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{
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return self::id2tz($id,$what);
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}
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return $id;
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}
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/**
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* Get timezone data for a given nummeric id
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*
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* if NOT tzid or alias queried, we automatically resolve an evtl. alias
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*
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* Example:
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* - calendar_timezone::id2tz($id) returns TZID
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* - calendar_timezone::id2tz($id,'component') returns VTIMEZONE component for the given id
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*
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* @param int $id
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* @param string $what='tzid' what data to return or null for whole data array, with keys 'id', 'tzid', 'component', 'alias', 'latitude', 'longitude'
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* @return mixed false: if not found
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*/
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public static function id2tz($id,$what='tzid')
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{
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$data =& self::$tz_cache[$id];
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if (!isset($data))
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{
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if (($data = $GLOBALS['egw']->db->select(self::TABLE,'*',array(
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'tz_id' => $id,
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),__LINE__,__FILE__,false,'','calendar')->fetch()))
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{
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$data = egw_db::strip_array_keys($data,'tz_');
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self::$tz2id[$data['tzid']] = $id;
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}
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}
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// if not tzid queried, resolve aliases automatically
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if ($data && $data['alias'] && $what != 'tzid' && $what != 'alias')
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{
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$data = self::id2tz($data['alias'],null);
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}
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return !$data ? $data : ($what ? $data[$what] : $data);
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}
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/**
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* Init static variables for session
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*
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* As we use the returned reference, we do NOT need to care about storing the information in the session
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*/
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public static function init_static()
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{
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self::$tz_cache =& egw_cache::getSession(__CLASS__,'tz_cache');
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self::$tz2id =& egw_cache::getSession(__CLASS__,'tz2id');
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}
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/**
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* Import timezones from sqlite file
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*
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* @param string $file='calendar/setup/timezones.sqlite' filename relative to EGW_SERVER_ROOT
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* @param boolean $check_version=true true: check version and only act, if it's different
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* @return string message about update
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* @throws egw_exception_wrong_parameter if $file is not readable or wrong format/version
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* @throws egw_exception_assertion_failed if no PDO sqlite support
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*/
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public static function import_sqlite($file='calendar/setup/timezones.sqlite',$check_version=true)
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{
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$path = EGW_SERVER_ROOT.'/'.$file;
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if (!file_exists($path) || !is_readable($path))
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{
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throw new egw_exception_wrong_parameter(__METHOD__."('$file') not found or readable!");
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}
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if (!check_load_extension('pdo') || !check_load_extension('pdo_sqlite'))
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{
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throw new egw_exception_assertion_failed(__METHOD__."('$file') required SQLite support (PHP extension pdo_sqlite) missing!");
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}
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$pdo = new PDO('sqlite:'.$path);
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if ($pdo->query('SELECT version FROM tz_schema_version')->fetchColumn() != 1)
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{
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throw new egw_exception_wrong_parameter(__METHOD__."('$file') only schema version 1 supported!");
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}
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$tz_version = $pdo->query('SELECT version FROM tz_version')->fetchColumn();
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$tz_db_version = $GLOBALS['egw']->db->query("SELECT config_value FROM egw_config WHERE config_name='tz_version' AND config_app='phpgwapi'",__LINE__,__FILE__)->fetchColumn();
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//echo "<p>tz_version($path)=$tz_version, tz_db_version=$tz_db_version</p>\n";
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if ($tz_version === $tz_db_version)
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{
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return lang('Nothing to update, version is already %1.',$tz_db_version); // we already have the right
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}
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$tz2id = array();
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foreach($pdo->query('SELECT * FROM tz_data ORDER BY alias') as $data)
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{
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if ($data['alias'])
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{
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$data['alias'] = $tz2id[$data['alias']];
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if (!$data['alias']) continue; // there's no such tzid
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}
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$GLOBALS['egw']->db->insert('egw_cal_timezones',array(
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'tz_alias' => $data['alias'],
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'tz_latitude' => $data['latitude'],
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'tz_longitude' => $data['longitude'],
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'tz_component' => $data['component'],
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),array(
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'tz_tzid' => $data['tzid'],
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),__LINE__,__FILE__,'calendar');
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if (!($tz2id[$data['tzid']] = $GLOBALS['egw']->db->get_last_insert_id('egw_cal_timezones','tz_id')))
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{
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$tz2id[$data['tzid']] = $GLOBALS['egw']->db->select('egw_cal_timezones','tz_id',array(
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'tz_tzid' => $data['tzid'],
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),__LINE__,__FILE__,false,'','calendar')->fetchColumn();
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}
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}
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$GLOBALS['egw']->db->insert('egw_config',array('config_value' => $tz_version),array(
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'config_name' => 'tz_version',
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'config_app' => 'phpgwapi',
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),__LINE__,__FILE__,'phpgwapi');
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//_debug_array($tz2id);
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return lang('Timezones updated to version %1 (%2 records updated).',$tz_version,count($tz2id));
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}
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/**
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* Admin >> Update timezones
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*
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*/
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public function update()
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{
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if (!$GLOBALS['egw_info']['user']['apps']['admin'])
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{
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throw new egw_exception_no_permission_admin();
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}
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$GLOBALS['egw']->framework->render('<h3>'.self::import_sqlite()."</h3>\n",lang('Update timezones'),true);
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}
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}
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/*
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if (isset($_SERVER['SCRIPT_FILENAME']) && $_SERVER['SCRIPT_FILENAME'] == __FILE__) // some tests
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{
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$GLOBALS['egw_info'] = array(
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'flags' => array(
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'currentapp' => 'calendar',
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)
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);
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include('../../header.inc.php');
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calendar_timezones::init_static();
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// echo "<h3>Testing availability of VTIMEZONE data for each tzid supported by PHP</h3>\n";
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// foreach(DateTimeZone::listIdentifiers() as $tz)
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echo "<h3>Testing availability of VTIMEZONE data for each TZID supported by EGroupware</h3>\n";
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foreach(call_user_func_array('array_merge',egw_time::getTimezones()) as $tz => $label)
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{
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if (($id = calendar_timezones::tz2id($tz,'component')) || $tz == 'UTC') // UTC is always supported
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{
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$found[] = $tz;
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//if (substr($tz,0,10) == 'Australia/') echo "$tz: found<br />\n";
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}
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else
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{
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$not_found[] = $tz;
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echo "$tz: <b>NOT</b> found<br />\n";
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}
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}
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echo '<h3>'.count($found).' found, '.count($not_found)." <b>NOT</b> found</h3>\n";
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if ($not_found) echo "<pre>\n\$no_vtimezone = array(\n\t'".implode("',\n\t'",$not_found)."',\n);\n</pre>\n";
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}
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else*/
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calendar_timezones::init_static();
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