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<?php

namespace Sabre\CalDAV\Xml\Property;

use Sabre\Xml\XmlSerializable;
use Sabre\Xml\Writer;
use Sabre\CalDAV\Plugin;
use Sabre\DAV;

/**
 * Invite property
 *
 * This property encodes the 'invite' property, as defined by
 * the 'caldav-sharing-02' spec, in the http://calendarserver.org/ns/
 * namespace.
 *
 * @see https://trac.calendarserver.org/browser/CalendarServer/trunk/doc/Extensions/caldav-sharing-02.txt
 * @copyright Copyright (C) fruux GmbH (https://fruux.com/)
 * @author Evert Pot (http://evertpot.com/)
 * @license http://sabre.io/license/ Modified BSD License
 */
class Invite implements XmlSerializable {

    /**
     * The list of users a calendar has been shared to.
     *
     * @var Sharee[]
     */
    protected $sharees;

    /**
     * Creates the property.
     *
     * @param Sharee[] $sharees
     */
    function __construct(array $sharees) {

        $this->sharees = $sharees;

    }

    /**
     * Returns the list of users, as it was passed to the constructor.
     *
     * @return array
     */
    function getValue() {

        return $this->sharees;

    }

    /**
     * The xmlSerialize metod is called during xml writing.
     *
     * Use the $writer argument to write its own xml serialization.
     *
     * An important note: do _not_ create a parent element. Any element
     * implementing XmlSerializble should only ever write what's considered
     * its 'inner xml'.
     *
     * The parent of the current element is responsible for writing a
     * containing element.
     *
     * This allows serializers to be re-used for different element names.
     *
     * If you are opening new elements, you must also close them again.
     *
     * @param Writer $writer
     * @return void
     */
    function xmlSerialize(Writer $writer) {

        $cs = '{' . Plugin::NS_CALENDARSERVER . '}';

        foreach ($this->sharees as $sharee) {

            if ($sharee->access === \Sabre\DAV\Sharing\Plugin::ACCESS_SHAREDOWNER) {
                $writer->startElement($cs . 'organizer');
            } else {
                $writer->startElement($cs . 'user');

                switch ($sharee->inviteStatus) {
                    case DAV\Sharing\Plugin::INVITE_ACCEPTED :
                        $writer->writeElement($cs . 'invite-accepted');
                        break;
                    case DAV\Sharing\Plugin::INVITE_DECLINED :
                        $writer->writeElement($cs . 'invite-declined');
                        break;
                    case DAV\Sharing\Plugin::INVITE_NORESPONSE :
                        $writer->writeElement($cs . 'invite-noresponse');
                        break;
                    case DAV\Sharing\Plugin::INVITE_INVALID :
                        $writer->writeElement($cs . 'invite-invalid');
                        break;
                }

                $writer->startElement($cs . 'access');
                switch ($sharee->access) {
                    case DAV\Sharing\Plugin::ACCESS_READWRITE :
                        $writer->writeElement($cs . 'read-write');
                        break;
                    case DAV\Sharing\Plugin::ACCESS_READ :
                        $writer->writeElement($cs . 'read');
                        break;

                }
                $writer->endElement(); // access

            }

            $href = new \Sabre\DAV\Xml\Property\Href($sharee->href);
            $href->xmlSerialize($writer);

            if (isset($sharee->properties['{DAV:}displayname'])) {
                $writer->writeElement($cs . 'common-name', $sharee->properties['{DAV:}displayname']);
            }
            if ($sharee->comment) {
                $writer->writeElement($cs . 'summary', $sharee->comment);
            }
            $writer->endElement(); // organizer or user

        }

    }

}