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<?php
namespace Sabre\VObject\Splitter;
use Sabre\VObject;
/**
* Splitter
*
* This class is responsible for splitting up iCalendar objects.
*
* This class expects a single VCALENDAR object with one or more
* calendar-objects inside. Objects with identical UID's will be combined into
* a single object.
*
* @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
* @author Dominik Tobschall
* @author Armin Hackmann
* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
*/
class ICalendar implements SplitterInterface {
/**
* Timezones
*
* @var array
*/
protected $vtimezones = array();
/**
* iCalendar objects
*
* @var array
*/
protected $objects = array();
/**
* Constructor
*
* The splitter should receive an readable file stream as it's input.
*
* @param resource $input
*/
public function __construct($input) {
$data = VObject\Reader::read(stream_get_contents($input));
$vtimezones = array();
$components = array();
foreach($data->children as $component) {
if (!$component instanceof VObject\Component) {
continue;
}
// Get all timezones
if ($component->name === 'VTIMEZONE') {
$this->vtimezones[(string)$component->TZID] = $component;
continue;
}
// Get component UID for recurring Events search
if($component->UID) {
$uid = (string)$component->UID;
} else {
// Generating a random UID
$uid = sha1(microtime()) . '-vobjectimport';
}
// Take care of recurring events
if (!array_key_exists($uid, $this->objects)) {
$this->objects[$uid] = VObject\Component::create('VCALENDAR');
}
$this->objects[$uid]->add(clone $component);
}
}
/**
* Every time getNext() is called, a new object will be parsed, until we
* hit the end of the stream.
*
* When the end is reached, null will be returned.
*
* @return Sabre\VObject\Component|null
*/
public function getNext() {
if($object=array_shift($this->objects)) {
// create our baseobject
$object->version = '2.0';
$object->prodid = '-//Sabre//Sabre VObject ' . VObject\Version::VERSION . '//EN';
$object->calscale = 'GREGORIAN';
// add vtimezone information to obj (if we have it)
foreach ($this->vtimezones as $vtimezone) {
$object->add($vtimezone);
}
return $object;
} else {
return null;
}
}
}
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