<?php
  
  use Sabre_CalDAV_SharingPlugin as SharingPlugin;
  
  /**
   * This class represents the cs:invite-reply notification element.
   *
   * @package Sabre
   * @subpackage CalDAV
   * @copyright Copyright (C) 2007-2013 Rooftop Solutions. All rights reserved.
   * @author Evert Pot (http://www.rooftopsolutions.nl/)
   * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
   */
  class Sabre_CalDAV_Notifications_Notification_InviteReply extends Sabre_DAV_Property implements Sabre_CalDAV_Notifications_INotificationType {
  
      /**
       * A unique id for the message
       *
       * @var string
       */
      protected $id;
  
      /**
       * Timestamp of the notification
       *
       * @var DateTime
       */
      protected $dtStamp;
  
      /**
       * The unique id of the notification this was a reply to.
       *
       * @var string
       */
      protected $inReplyTo;
  
      /**
       * A url to the recipient of the original (!) notification.
       *
       * @var string
       */
      protected $href;
  
      /**
       * The type of message, see the SharingPlugin::STATUS_ constants.
       *
       * @var int
       */
      protected $type;
  
      /**
       * A url to the shared calendar.
       *
       * @var string
       */
      protected $hostUrl;
  
      /**
       * A description of the share request
       *
       * @var string
       */
      protected $summary;
  
      /**
       * Notification Etag
       *
       * @var string
       */
      protected $etag;
  
      /**
       * Creates the Invite Reply Notification.
       *
       * This constructor receives an array with the following elements:
       *
       *   * id           - A unique id
       *   * etag         - The etag
       *   * dtStamp      - A DateTime object with a timestamp for the notification.
       *   * inReplyTo    - This should refer to the 'id' of the notification
       *                    this is a reply to.
       *   * type         - The type of notification, see SharingPlugin::STATUS_*
       *                    constants for details.
       *   * hostUrl      - A url to the shared calendar.
       *   * summary      - Description of the share, can be the same as the
       *                    calendar, but may also be modified (optional).
       */
      public function __construct(array $values) {
  
          $required = array(
              'id',
              'etag',
              'href',
              'dtStamp',
              'inReplyTo',
              'type',
              'hostUrl',
          );
          foreach($required as $item) {
              if (!isset($values[$item])) {
                  throw new InvalidArgumentException($item . ' is a required constructor option');
              }
          }
  
          foreach($values as $key=>$value) {
              if (!property_exists($this, $key)) {
                  throw new InvalidArgumentException('Unknown option: ' . $key);
              }
              $this->$key = $value;
          }
  
      }
  
      /**
       * Serializes the notification as a single property.
       *
       * You should usually just encode the single top-level element of the
       * notification.
       *
       * @param Sabre_DAV_Server $server
       * @param DOMElement $node
       * @return void
       */
      public function serialize(Sabre_DAV_Server $server, \DOMElement $node) {
  
          $prop = $node->ownerDocument->createElement('cs:invite-reply');
          $node->appendChild($prop);
  
      }
  
      /**
       * This method serializes the entire notification, as it is used in the
       * response body.
       *
       * @param Sabre_DAV_Server $server
       * @param DOMElement $node
       * @return void
       */
      public function serializeBody(Sabre_DAV_Server $server, \DOMElement $node) {
  
          $doc = $node->ownerDocument;
  
          $dt = $doc->createElement('cs:dtstamp');
          $this->dtStamp->setTimezone(new \DateTimezone('GMT'));
          $dt->appendChild($doc->createTextNode($this->dtStamp->format('Ymd\\THis\\Z')));
          $node->appendChild($dt);
  
          $prop = $doc->createElement('cs:invite-reply');
          $node->appendChild($prop);
  
          $uid = $doc->createElement('cs:uid');
          $uid->appendChild($doc->createTextNode($this->id));
          $prop->appendChild($uid);
  
          $inReplyTo = $doc->createElement('cs:in-reply-to');
          $inReplyTo->appendChild( $doc->createTextNode($this->inReplyTo) );
          $prop->appendChild($inReplyTo);
  
          $href = $doc->createElement('d:href');
          $href->appendChild( $doc->createTextNode($this->href) );
          $prop->appendChild($href);
  
          $nodeName = null;
          switch($this->type) {
  
              case SharingPlugin::STATUS_ACCEPTED :
                  $nodeName = 'cs:invite-accepted';
                  break;
              case SharingPlugin::STATUS_DECLINED :
                  $nodeName = 'cs:invite-declined';
                  break;
  
          }
          $prop->appendChild(
              $doc->createElement($nodeName)
          );
          $hostHref = $doc->createElement('d:href', $server->getBaseUri() . $this->hostUrl);
          $hostUrl  = $doc->createElement('cs:hosturl');
          $hostUrl->appendChild($hostHref);
          $prop->appendChild($hostUrl);
  
          if ($this->summary) {
              $summary = $doc->createElement('cs:summary');
              $summary->appendChild($doc->createTextNode($this->summary));
              $prop->appendChild($summary);
          }
  
      }
  
      /**
       * Returns a unique id for this notification
       *
       * This is just the base url. This should generally be some kind of unique
       * id.
       *
       * @return string
       */
      public function getId() {
  
          return $this->id;
  
      }
  
      /**
       * Returns the ETag for this notification.
       *
       * The ETag must be surrounded by literal double-quotes.
       *
       * @return string
       */
      public function getETag() {
  
          return $this->etag;
  
      }
  }