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#!/usr/bin/env php
<?php
/**
* DAViCal Timezone Service handler - update timezones
*
* @package davical
* @subpackage tzservice
* @author Andrew McMillan <andrew@morphoss.com>
* @copyright Morphoss Ltd
* @license http://gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
$script_file = __FILE__;
if ( $argc < 2 ) {
echo <<<USAGE
Usage:
$script_file davical.example.com [timezone_source]
Where 'davical.example.com' is the hostname of your DAViCal server and the
optional 'timezone_source' is the source of the timezone data. If not specified
this will default to the value of the $$c->tzsource configuration value, with
a further default to the zonedb/vtimezone directory relative to the root of the
DAViCal installation.
This script can be used to initialise or update the timezone information in
DAViCal used for the in-built timezone service.
USAGE;
exit(1);
}
$_SERVER['SERVER_NAME'] = $argv[1];
$original_dir = getcwd();
chdir(str_replace('/scripts/tz-update.php','/htdocs',$script_file));
require_once("./always.php");
if ( isset($argv[2]) ) {
$c->tzsource = $argv[2];
}
require_once('vCalendar.php');
require_once('XMLDocument.php');
require_once('RRule.php');
chdir($original_dir);
$new_zones = 0;
$modified_zones = 0;
$added_aliases = 0;
function fetch_remote_list($base_url ) {
global $request;
$result = array();
$list_url = $base_url . '?action=list';
printf( "Fetching timezone list\n", $list_url );
$raw_xml = file_get_contents($list_url);
$xml_parser = xml_parser_create_ns('UTF-8');
$xml_tags = array();
xml_parser_set_option ( $xml_parser, XML_OPTION_SKIP_WHITE, 1 );
xml_parser_set_option ( $xml_parser, XML_OPTION_CASE_FOLDING, 0 );
$rc = xml_parse_into_struct( $xml_parser, $raw_xml, $xml_tags );
if ( $rc == false ) {
dbg_error_log( 'ERROR', 'XML parsing error: %s at line %d, column %d', xml_error_string(xml_get_error_code($xml_parser)),
xml_get_current_line_number($xml_parser), xml_get_current_column_number($xml_parser) );
$request->PreconditionFailed(400, 'invalid-xml',
sprintf('XML parsing error: %s at line %d, column %d', xml_error_string(xml_get_error_code($xml_parser)),
xml_get_current_line_number($xml_parser), xml_get_current_column_number($xml_parser) ));
}
xml_parser_free($xml_parser);
return BuildXMLTree( $xml_tags );
}
function fetch_remote_zone( $base_url, $tzid ) {
$tz_url = $base_url . '?action=get&tzid=' .$tzid;
printf( "Fetching zone for %s from %s\n", $tzid, $tz_url );
dbg_error_log( 'tz/updatecheck', "Fetching zone for %s from %s\n", $tzid, $tz_url );
$vtimezone = file_get_contents( $tz_url );
return $vtimezone;
}
function fetch_db_zone( $tzid ) {
$tzrow = null;
$qry = new AwlQuery('SELECT * FROM timezones WHERE tzid=:tzid', array(':tzid' => $tzid));
if ( $qry->Exec('tz/update',__LINE__,__FILE__) && $qry->rows() > 0 ) {
$tzrow = $qry->Fetch();
}
return $tzrow;
}
function write_updated_zone( $vtimezone, $tzid ) {
global $new_zones, $modified_zones;
if ( empty($vtimezone) ) {
dbg_error_log('tz/updatecheck', 'Skipping zone "%s" - no data from server', $tzid );
return;
}
$tzrow = fetch_db_zone($tzid);
if ( isset($tzrow) && $vtimezone == $tzrow->vtimezone ) {
dbg_error_log('tz/updatecheck', 'Skipping zone "%s" - no change', $tzid );
return;
}
$vtz = new vCalendar($vtimezone);
$last_modified = $vtz->GetPValue('LAST-MODIFIED');
if ( empty($last_modified) ) {
$last_modified = gmdate('Ymd\THis\Z');
// Then it was probably that way when we last updated the data, too :-(
if ( !empty($tzrow) ) {
$old_vtz = new vCalendar($tzrow->vtimezone);
$old_vtz->ClearProperties('LAST-MODIFIED');
// We need to add & remove this property so the Render is equivalent.
$vtz->AddProperty('LAST-MODIFIED',$last_modified);
$vtz->ClearProperties('LAST-MODIFIED');
if ( $vtz->Render() == $old_vtz->Render() ) {
dbg_error_log('tz/updatecheck', 'Skipping zone "%s" - no change', $tzid );
return;
}
}
$vtz->AddProperty('LAST-MODIFIED',$last_modified);
}
dbg_error_log('tz/updatecheck', 'Writing %s zone for "%s"', (empty($tzrow)?"new":"updated"), $tzid );
printf("Writing %s zone for '%s'\n", (empty($tzrow)?"new":"updated"), $tzid );
$params = array(
':tzid' => $tzid,
':olson_name' => $tzid,
':vtimezone' => $vtz->Render(),
':last_modified' => $last_modified,
':etag' => md5($vtz->Render())
);
if ( empty($tzrow) ) {
$new_zones++;
$sql = 'INSERT INTO timezones(tzid,active,olson_name,last_modified,etag,vtimezone) ';
$sql .= 'VALUES(:tzid,TRUE,:olson_name,:last_modified,:etag,:vtimezone)';
}
else {
$modified_zones++;
$sql = 'UPDATE timezones SET active=TRUE, olson_name=:olson_name, last_modified=:last_modified, ';
$sql .= 'etag=:etag, vtimezone=:vtimezone WHERE tzid=:tzid';
}
$qry = new AwlQuery($sql,$params);
$qry->Exec('tz/update',__LINE__,__FILE__);
}
function write_zone_aliases( $tzid, $aliases ) {
global $added_aliases;
foreach( $aliases AS $alias_node ) {
$alias = $alias_node->GetContent();
$params = array(':tzid' => $tzid, ':alias' => $alias );
$qry = new AwlQuery('SELECT * FROM tz_aliases JOIN timezones USING(our_tzno) WHERE tzid=:tzid AND tzalias=:alias', $params);
if ( $qry->Exec('tz/update', __LINE__, __FILE__) && $qry->rows() < 1 ) {
$qry->QDo('INSERT INTO tz_aliases(our_tzno,tzalias) SELECT our_tzno, :alias FROM timezones WHERE tzid = :tzid', $params);
$added_aliases++;
}
}
}
if ( empty($c->tzsource) ) $c->tzsource = '../zonedb/vtimezones';
if ( preg_match('{^http}', $c->tzsource ) ) {
$changesince = null;
$qry = new AwlQuery("SELECT tzid, to_char(last_modified,'YYYY-MM-DD\"T\"HH24:MI:SS\"Z\"') AS last_modified FROM timezones ORDER BY tzid");
$current_zones = array();
if ( $qry->Exec('tz/updatecheck',__LINE__,__FILE__) && $qry->rows() > 0 ) {
while( $row = $qry->Fetch() )
$current_zones[$row->tzid] = new RepeatRuleDateTime($row->last_modified);
}
$xmltree = fetch_remote_list($c->tzsource);
$zones = $xmltree->GetElements('urn:ietf:params:xml:ns:timezone-service:summary');
foreach( $zones AS $zone ) {
$elements = $zone->GetElements('urn:ietf:params:xml:ns:timezone-service:tzid');
$tzid = $elements[0]->GetContent();
$elements = $zone->GetElements('urn:ietf:params:xml:ns:timezone-service:last-modified');
$last_modified = new RepeatRuleDateTime($elements[0]->GetContent());
if ( !isset($current_zones[$tzid]) || $last_modified > $current_zones[$tzid] ) {
printf("Found timezone %s needs updating\n", $tzid );
$vtimezone = fetch_remote_zone($c->tzsource,$tzid);
write_updated_zone($vtimezone, $tzid);
}
$elements = $zone->GetElements('urn:ietf:params:xml:ns:timezone-service:alias');
write_zone_aliases($tzid, $elements);
}
}
else if ( file_exists($c->tzsource) ) {
/**
* Find all files recursively within the diectory given.
* @param string $dirname The directory to find files in
* @return array of filenames with full path
*/
function recursive_files( $dirname ) {
$d = opendir($dirname);
$result = array();
while( false !== ($fn = readdir($d)) ) {
if ( substr($fn,0,1) == '.' ) continue;
if ( substr($fn,0,14) == 'primary-source' ) continue;
if ( substr($fn,0,5) == 'zones' ) continue;
$fn = $dirname.'/'.$fn;
if ( is_dir($fn) ) {
$result = array_merge($result,recursive_files($fn));
}
else {
$result[] = $fn;
}
}
sort($result, SORT_STRING);
return $result;
}
$qry = new AwlQuery();
foreach( recursive_files($c->tzsource) AS $filename ) {
$tzid = str_replace('.ics', '', str_replace($c->tzsource.'/', '', $filename));
$vtimezone = file_get_contents( $filename, false );
write_updated_zone($vtimezone, $tzid);
}
}
else {
dbg_error_log('ERROR', '$c->tzsource is not configured to a good source of timezone data');
}
printf("Added %d new zones, updated data for %d zones and added %d new aliases\n",
$new_zones, $modified_zones, $added_aliases);
exit(0);
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