<?php

  namespace Sabre\CalDAV\Property;
  
  use Sabre\DAV;
  use Sabre\CalDAV;

  /**
   * schedule-calendar-transp property.
   *
   * This property is a representation of the schedule-calendar-transp property.
   * This property is defined in RFC6638 (caldav scheduling).
   *
   * Its values are either 'transparent' or 'opaque'. If it's transparent, it
   * means that this calendar will not be taken into consideration when a
   * different user queries for free-busy information. If it's 'opaque', it will.
   *

   * @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
   * @author Evert Pot (http://evertpot.com/)
   * @license http://sabre.io/license/ Modified BSD License

   */

  class ScheduleCalendarTransp extends DAV\Property {

  
      const TRANSPARENT = 'transparent';
      const OPAQUE = 'opaque';
  
      protected $value;
  
      /**
       * Creates the property
       *
       * @param string $value
       */
      public function __construct($value) {
  
          if ($value !== self::TRANSPARENT && $value !== self::OPAQUE) {
              throw new \InvalidArgumentException('The value must either be specified as "transparent" or "opaque"');
          }
          $this->value = $value;
  
      }
  
      /**
       * Returns the current value
       *
       * @return string
       */
      public function getValue() {
  
          return $this->value;
  
      }
  
      /**
       * Serializes the property in a DOMDocument
       *

       * @param DAV\Server $server
       * @param \DOMElement $node

       * @return void
       */

      public function serialize(DAV\Server $server,\DOMElement $node) {

  
          $doc = $node->ownerDocument;
          switch($this->value) {
              case self::TRANSPARENT :
                  $xval = $doc->createElement('cal:transparent');
                  break;
              case self::OPAQUE :
                  $xval = $doc->createElement('cal:opaque');
                  break;
          }
  
          $node->appendChild($xval);
  
      }
  
      /**
       * Unserializes the DOMElement back into a Property class.
       *

       * @param \DOMElement $node
       * @return ScheduleCalendarTransp

       */

      static function unserialize(\DOMElement $node) {

  
          $value = null;
          foreach($node->childNodes as $childNode) {

              switch(DAV\XMLUtil::toClarkNotation($childNode)) {
                  case '{' . CalDAV\Plugin::NS_CALDAV . '}opaque' :

                      $value = self::OPAQUE;
                      break;

                  case '{' . CalDAV\Plugin::NS_CALDAV . '}transparent' :

                      $value = self::TRANSPARENT;
                      break;
              }
          }
          if (is_null($value))
             return null;
  
          return new self($value);
  
      }
  }