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kolab_format.php
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kolab_format.php
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<?php
/**
* Kolab format model class wrapping libkolabxml bindings
*
* Abstract base class for different Kolab groupware objects read from/written
* to the new Kolab 3 format using the PHP bindings of libkolabxml.
*
* @version @package_version@
* @author Thomas Bruederli <bruederli@kolabsys.com>
*
* Copyright (C) 2012, Kolab Systems AG <contact@kolabsys.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
abstract class kolab_format
{
public static $timezone;
protected $obj;
protected $data;
protected $xmldata;
protected $loaded = false;
/**
* Factory method to instantiate a kolab_format object of the given type
*
* @param string Object type to instantiate
* @param string Cached xml data to initialize with
* @return object kolab_format
*/
public static function factory($type, $xmldata = null)
{
if (!isset(self::$timezone))
self::$timezone = new DateTimeZone('UTC');
$suffix = preg_replace('/[^a-z]+/', '', $type);
$classname = 'kolab_format_' . $suffix;
if (class_exists($classname))
return new $classname($xmldata);
return PEAR::raiseError(sprintf("Failed to load Kolab Format wrapper for type %s", $type));
}
/**
* Convert the given date/time value into a cDateTime object
*
* @param mixed Date/Time value either as unix timestamp, date string or PHP DateTime object
* @param DateTimeZone The timezone the date/time is in. Use global default if empty
* @param boolean True of the given date has no time component
* @return object The libkolabxml date/time object
*/
public static function get_datetime($datetime, $tz = null, $dateonly = false)
{
if (!$tz) $tz = self::$timezone;
$result = new cDateTime();
// got a unix timestamp (in UTC)
if (is_numeric($datetime)) {
$datetime = new DateTime('@'.$datetime, new DateTimeZone('UTC'));
if ($tz) $datetime->setTimezone($tz);
}
else if (is_string($datetime) && strlen($datetime))
$datetime = new DateTime($datetime, $tz);
if (is_a($datetime, 'DateTime')) {
$result->setDate($datetime->format('Y'), $datetime->format('n'), $datetime->format('j'));
if (!$dateonly)
$result->setTime($datetime->format('G'), $datetime->format('i'), $datetime->format('s'));
if ($tz && $tz->getName() == 'UTC')
$result->setUTC(true);
else if ($tz)
$result->setTimezone($tz->getName());
}
return $result;
}
/**
* Convert the given cDateTime into a PHP DateTime object
*
* @param object cDateTime The libkolabxml datetime object
* @return object DateTime PHP datetime instance
*/
public static function php_datetime($cdt)
{
if (!is_object($cdt) || !$cdt->isValid())
return null;
$d = new DateTime;
$d->setTimezone(self::$timezone);
try {
if ($tzs = $cdt->timezone()) {
$tz = new DateTimeZone($tzs);
$d->setTimezone($tz);
}
else if ($cdt->isUTC()) {
$d->setTimezone(new DateTimeZone('UTC'));
}
}
catch (Exception $e) { }
$d->setDate($cdt->year(), $cdt->month(), $cdt->day());
if ($cdt->isDateOnly()) {
$d->_dateonly = true;
$d->setTime(12, 0, 0); // set time to noon to avoid timezone troubles
}
else {
$d->setTime($cdt->hour(), $cdt->minute(), $cdt->second());
}
return $d;
}
/**
* Convert a libkolabxml vector to a PHP array
*
* @param object vector Object
* @return array Indexed array contaning vector elements
*/
public static function vector2array($vec, $max = PHP_INT_MAX)
{
$arr = array();
for ($i=0; $i < $vec->size() && $i < $max; $i++)
$arr[] = $vec->get($i);
return $arr;
}
/**
* Build a libkolabxml vector (string) from a PHP array
*
* @param array Array with vector elements
* @return object vectors
*/
public static function array2vector($arr)
{
$vec = new vectors;
foreach ((array)$arr as $val) {
if (strlen($val))
$vec->push($val);
}
return $vec;
}
/**
* Check for format errors after calling kolabformat::write*()
*
* @return boolean True if there were errors, False if OK
*/
protected function format_errors()
{
$ret = $log = false;
switch (kolabformat::error()) {
case kolabformat.NoError:
$ret = false;
break;
case kolabformat.Warning:
$ret = false;
$log = "Warning";
break;
default:
$ret = true;
$log = "Error";
}
if ($log) {
raise_error(array(
'code' => 660,
'type' => 'php',
'file' => __FILE__,
'line' => __LINE__,
'message' => "kolabformat write $log: " . kolabformat::errorMessage(),
), true);
}
return $ret;
}
/**
* Save the last generated UID to the object properties.
* Should be called after kolabformat::writeXXXX();
*/
protected function update_uid()
{
// get generated UID
if (!$this->data['uid']) {
$this->data['uid'] = kolabformat::getSerializedUID();
$this->obj->setUid($this->data['uid']);
}
}
/**
* Initialize libkolabxml object with cached xml data
*/
protected function init()
{
if (!$this->loaded) {
if ($this->xmldata) {
$this->load($this->xmldata);
$this->xmldata = null;
}
$this->loaded = true;
}
}
/**
* Direct getter for object properties
*/
public function __get($var)
{
return $this->data[$var];
}
/**
* Load Kolab object data from the given XML block
*
* @param string XML data
*/
abstract public function load($xml);
/**
* Set properties to the kolabformat object
*
* @param array Object data as hash array
*/
abstract public function set(&$object);
/**
*
*/
abstract public function is_valid();
/**
* Write object data to XML format
*
* @return string XML data
*/
abstract public function write();
/**
* Convert the Kolab object into a hash array data structure
*
* @return array Kolab object data as hash array
*/
abstract public function to_array();
/**
* Load object data from Kolab2 format
*
* @param array Hash array with object properties (produced by Horde Kolab_Format classes)
*/
abstract public function fromkolab2($object);
/**
* Callback for kolab_storage_cache to get object specific tags to cache
*
* @return array List of tags to save in cache
*/
public function get_tags()
{
return array();
}
/**
* Callback for kolab_storage_cache to get words to index for fulltext search
*
* @return array List of words to save in cache
*/
public function get_words()
{
return array();
}
}

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