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<?php
/**
 * Handles api-version 1 of auto-generated date attributes.
 *
 * PHP version 5
 *
 * @category Kolab
 * @package  Kolab_Format
 * @author   Gunnar Wrobel <wrobel@pardus.de>
 * @license  http://www.horde.org/licenses/lgpl21 LGPL
 * @link     http://www.horde.org/libraries/Horde_Kolab_Format
 */

/**
 * Handles api-version 1 of auto-generated date attributes.
 *
 * Copyright 2011-2016 Horde LLC (http://www.horde.org/)
 *
 * See the enclosed file COPYING for license information (LGPL). If you did not
 * receive this file, see
 * http://www.horde.org/licenses/lgpl21.
 *
 * @category Kolab
 * @package  Kolab_Format
 * @author   Gunnar Wrobel <wrobel@pardus.de>
 * @license  http://www.horde.org/licenses/lgpl21 LGPL
 * @link     http://www.horde.org/libraries/Horde_Kolab_Format
 */
class Horde_Kolab_Format_Xml_Type_AutomaticDate_V1
extends Horde_Kolab_Format_Xml_Type_Base
{
    /**
     * Load the node value from the Kolab object.
     *
     * @param string                        $name        The name of the the
     *                                                   attribute to be fetched.
     * @param array                         &$attributes The data array that
     *                                                   holds all attribute
     *                                                   values.
     * @param DOMNode                       $parent_node The parent node of the
     *                                                   node to be loaded.
     * @param Horde_Kolab_Format_Xml_Helper $helper      A XML helper instance.
     * @param array                         $params      Additiona parameters for
     *                                                   this parse operation.
     *
     * @return DOMNode|boolean The named DOMNode or false if no node value was
     *                         found.
     */
    public function load(
        $name,
        &$attributes,
        $parent_node,
        Horde_Kolab_Format_Xml_Helper $helper,
        $params = array()
    )
    {
        $result = parent::load($name, $attributes, $parent_node, $helper, $params);
        if ($result !== false) {
            return $result;
        } else {
            $attributes[$name] = time();
        }
    }

    /**
     * Load the value of a node.
     *
     * @param DOMNode                       $node   Retrieve value for this node.
     * @param Horde_Kolab_Format_Xml_Helper $helper A XML helper instance.
     * @param array                         $params Additiona parameters for
     *                                              this parse operation.
     *
     * @return mixed|null The value or null if no value was found.
     */
    public function loadNodeValue(
        $node,
        Horde_Kolab_Format_Xml_Helper $helper,
        $params = array()
    )
    {
        $result = $helper->fetchNodeValue($node);
        if ($result !== null) {
            $date = Horde_Kolab_Format_Date::readUtcDateTime($result);
            if ($date === false && !$this->isRelaxed($params)) {
                throw new Horde_Kolab_Format_Exception(
                    sprintf('Invalid date input "%s"!', $result)
                );
            }
            return $date;
        } else {
            return $result;
        }
    }
}