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<?php
namespace Sabre\VObject\Splitter;
use Sabre\VObject;
use Sabre\VObject\Component\VCalendar;
/**
* 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) fruux GmbH (https://fruux.com/)
* @author Dominik Tobschall (http://tobschall.de/)
* @author Armin Hackmann
* @license http://sabre.io/license/ Modified BSD License
*/
class ICalendar implements SplitterInterface {
/**
* Timezones.
*
* @var array
*/
protected $vtimezones = [];
/**
* iCalendar objects.
*
* @var array
*/
protected $objects = [];
/**
* Constructor.
*
* The splitter should receive an readable file stream as it's input.
*
* @param resource $input
* @param int $options Parser options, see the OPTIONS constants.
*/
function __construct($input, $options = 0) {
$data = VObject\Reader::read($input, $options);
if (!$data instanceof VObject\Component\VCalendar) {
throw new VObject\ParseException('Supplied input could not be parsed as VCALENDAR.');
}
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) {
$component->UID = sha1(microtime()) . '-vobjectimport';
}
$uid = (string)$component->UID;
// Take care of recurring events
if (!array_key_exists($uid, $this->objects)) {
$this->objects[$uid] = new VCalendar();
}
$this->objects[$uid]->add(clone $component);
}
}
/**
* Every time getNext() is called, a new object will be parsed, until we
* hit the end of the stream.
*
* When the end is reached, null will be returned.
*
* @return \Sabre\VObject\Component|null
*/
function getNext() {
if ($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;
}
}
}