<?php

/**
 * Kolab Task (ToDo) model class
 *
 * @version @package_version@
 * @author Thomas Bruederli <bruederli@kolabsys.com>
 *
 * Copyright (C) 2012, Kolab Systems AG <contact@kolabsys.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

class kolab_format_task extends kolab_format_xcal
{
    public $CTYPEv2 = 'application/x-vnd.kolab.task';

    public static $scheduling_properties = array('start', 'due', 'summary', 'status');

    protected $objclass = 'Todo';
    protected $read_func = 'readTodo';
    protected $write_func = 'writeTodo';

    /**
     * Default constructor
     */
    function __construct($data = null, $version = 3.0)
    {
        parent::__construct(is_string($data) ? $data : null, $version);

        // copy static property overriden by this class
        $this->_scheduling_properties = self::$scheduling_properties;
    }

    /**
     * Set properties to the kolabformat object
     *
     * @param array  Object data as hash array
     */
    public function set(&$object)
    {
        // set common xcal properties
        parent::set($object);

        $this->obj->setPercentComplete(intval($object['complete']));

        $status = kolabformat::StatusUndefined;
        if ($object['complete'] == 100 && !array_key_exists('status', $object))
            $status = kolabformat::StatusCompleted;
        else if ($object['status'] && array_key_exists($object['status'], $this->status_map))
            $status = $this->status_map[$object['status']];
        $this->obj->setStatus($status);

        $this->obj->setStart(self::get_datetime($object['start'], null, $object['start']->_dateonly));
        $this->obj->setDue(self::get_datetime($object['due'], null, $object['due']->_dateonly));

        $related = new vectors;
        if (!empty($object['parent_id']))
            $related->push($object['parent_id']);
        $this->obj->setRelatedTo($related);

        // cache this data
        $this->data = $object;
        unset($this->data['_formatobj']);
    }

    /**
     *
     */
    public function is_valid()
    {
        return !$this->formaterror && ($this->data || (is_object($this->obj) && $this->obj->isValid()));
    }

    /**
     * Convert the Configuration object into a hash array data structure
     *
     * @param array Additional data for merge
     *
     * @return array  Config object data as hash array
     */
    public function to_array($data = array())
    {
        // return cached result
        if (!empty($this->data))
            return $this->data;

        // read common xcal props
        $object = parent::to_array($data);

        $object['complete'] = intval($this->obj->percentComplete());

        // if due date is set
        if ($due = $this->obj->due())
            $object['due'] = self::php_datetime($due);

        // related-to points to parent task; we only support one relation
        $related = self::vector2array($this->obj->relatedTo());
        if (count($related))
            $object['parent_id'] = $related[0];

        // TODO: map more properties

        $this->data = $object;
        return $this->data;
    }

    /**
     * Return the reference date for recurrence and alarms
     *
     * @return mixed DateTime instance of null if no refdate is available
     */
    public function get_reference_date()
    {
        if ($this->data['due'] && $this->data['due'] instanceof DateTime) {
            return $this->data['due'];
        }

        return self::php_datetime($this->obj->due()) ?: parent::get_reference_date();
    }

    /**
     * Callback for kolab_storage_cache to get object specific tags to cache
     *
     * @return array List of tags to save in cache
     */
    public function get_tags($obj = null)
    {
        $tags = parent::get_tags($obj);
        $object = $obj ?: $this->data;

        if ($object['status'] == 'COMPLETED' || ($object['complete'] == 100 && empty($object['status'])))
            $tags[] = 'x-complete';

        if ($object['priority'] == 1)
            $tags[] = 'x-flagged';

        if ($object['parent_id'])
            $tags[] = 'x-parent:' . $object['parent_id'];

        return array_unique($tags);
    }

}