<?php

/**
 * $Id:$
 *
 * KnowledgeTree Community Edition
 * Document Management Made Simple
 * Copyright (C) 2008, 2009 KnowledgeTree Inc.
 * 
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License version 3 as published by the
 * Free Software Foundation.
 *
 * 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 General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * You can contact KnowledgeTree Inc., PO Box 7775 #87847, San Francisco,
 * California 94120-7775, or email info@knowledgetree.com.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "Powered by
 * KnowledgeTree" logo and retain the original copyright notice. If the display of the
 * logo is not reasonably feasible for technical reasons, the Appropriate Legal Notices
 * must display the words "Powered by KnowledgeTree" and retain the original
 * copyright notice.
 * Contributor( s): ______________________________________
 *
 */

class CreatedByField extends DBFieldExpr
{
    public function __construct()
    {
        parent::__construct('creator_id', 'documents',_kt('Created By'));
        $this->setAlias('CreatedBy');
		$this->joinTo('users', 'id');
		$this->matchField('name');
    }

    public function appliesToContext()
    {
        return ExprContext::DOCUMENT | ExprContext::FOLDER;
    }

    public function setContext($context)
    {
        parent::setContext($context);
        switch($context)
        {
            case ExprContext::DOCUMENT:
                $this->table = 'documents';
                break;
            case ExprContext::FOLDER:
                $this->table = 'folders';
                break;
        }
    }

    public function getInputRequirements()
    {
        return array('value'=>array('type'=>FieldInputType::USER_LIST));
    }

    public function is_valid()
    {
        return DefaultOpCollection::validateParent($this, DefaultOpCollection::$is);
    }
}

?>