<?php

namespace Sabre\DAV;

/**
 * IProperties interface
 *
 * Implement this interface to support custom WebDAV properties requested and sent from clients.
 *
 * @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
 */
interface IProperties extends INode {

    /**
     * Updates properties on this node,
     *
     * The properties array uses the propertyName in clark-notation as key,
     * and the array value for the property value. In the case a property
     * should be deleted, the property value will be null.
     *
     * This method must be atomic. If one property cannot be changed, the
     * entire operation must fail.
     *
     * If the operation was successful, true can be returned.
     * If the operation failed, false can be returned.
     *
     * Deletion of a non-existent property is always successful.
     *
     * Lastly, it is optional to return detailed information about any
     * failures. In this case an array should be returned with the following
     * structure:
     *
     * array(
     *   403 => array(
     *      '{DAV:}displayname' => null,
     *   ),
     *   424 => array(
     *      '{DAV:}owner' => null,
     *   )
     * )
     *
     * In this example it was forbidden to update {DAV:}displayname.
     * (403 Forbidden), which in turn also caused {DAV:}owner to fail
     * (424 Failed Dependency) because the request needs to be atomic.
     *
     * @param array $mutations
     * @return bool|array
     */
    function updateProperties($mutations);

    /**
     * Returns a list of properties for this nodes.
     *
     * The properties list is a list of propertynames the client requested,
     * encoded in clark-notation {xmlnamespace}tagname
     *
     * If the array is empty, it means 'all properties' were requested.
     *
     * Note that it's fine to liberally give properties back, instead of
     * conforming to the list of requested properties.
     * The Server class will filter out the extra.
     *
     * @param array $properties
     * @return void
     */
    function getProperties($properties);

}

