VTimeZone.php
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VTimeZone.php
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	<?php

	namespace Sabre\VObject\Component;

	use Sabre\VObject;

	/**
	* The VTimeZone component
	*
	* This component adds functionality to a component, specific for VTIMEZONE
	* components.
	*
	* @copyright Copyright (C) 2011-2015 fruux GmbH (https://fruux.com/).
	* @author Evert Pot (http://evertpot.com/)
	* @license http://sabre.io/license/ Modified BSD License
	*/
	class VTimeZone extends VObject\Component {

	/**
	* Returns the PHP DateTimeZone for this VTIMEZONE component.
	*
	* If we can't accurately determine the timezone, this method will return
	* UTC.
	*
	* @return \DateTimeZone
	*/
	function getTimeZone() {

	return VObject\TimeZoneUtil::getTimeZone((string)$this->TZID, $this->root);

	}

	/**
	* A simple list of validation rules.
	*
	* This is simply a list of properties, and how many times they either
	* must or must not appear.
	*
	* Possible values per property:
	* * 0 - Must not appear.
	* * 1 - Must appear exactly once.
	* * + - Must appear at least once.
	* * * - Can appear any number of times.
	* * ? - May appear, but not more than once.
	*
	* @var array
	*/
	function getValidationRules() {

	return array(
	'TZID' => 1,

	'LAST-MODIFIED' => '?',
	'TZURL' => '?',

	// At least 1 STANDARD or DAYLIGHT must appear, or more. But both
	// cannot appear in the same VTIMEZONE.
	//
	// The validator is not specific yet to pick this up, so these
	// rules are too loose.
	'STANDARD' => '*',
	'DAYLIGHT' => '*',
	);

	}

	}