<?php
if(!defined('sugarEntry') || !sugarEntry) die('Not A Valid Entry Point');
/*********************************************************************************
 * SugarCRM Community Edition is a customer relationship management program developed by
 * SugarCRM, Inc. Copyright (C) 2004-2013 SugarCRM Inc.
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License version 3 as published by the
 * Free Software Foundation with the addition of the following permission added
 * to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
 * IN WHICH THE COPYRIGHT IS OWNED BY SUGARCRM, SUGARCRM DISCLAIMS THE WARRANTY
 * OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 * 
 * 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 or write to the Free
 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 * 
 * You can contact SugarCRM, Inc. headquarters at 10050 North Wolfe Road,
 * SW2-130, Cupertino, CA 95014, USA. or at email address contact@sugarcrm.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 Affero General Public License version 3.
 * 
 * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "Powered by
 * SugarCRM" logo. If the display of the logo is not reasonably feasible for
 * technical reasons, the Appropriate Legal Notices must display the words
 * "Powered by SugarCRM".
 ********************************************************************************/


require_once("data/Relationships/SugarRelationship.php");
require_once("data/Relationships/One2MRelationship.php");

/**
 * Represents 1-1 relationship
 * @api
 */
class One2OneRelationship extends M2MRelationship
{

    public function __construct($def)
    {
        parent::__construct($def);
    }
    /**
     * @param  $lhs SugarBean left side bean to add to the relationship.
     * @param  $rhs SugarBean right side bean to add to the relationship.
     * @param  $additionalFields key=>value pairs of fields to save on the relationship
     * @return boolean true if successful
     */
    public function add($lhs, $rhs, $additionalFields = array())
    {
        $dataToInsert = $this->getRowToInsert($lhs, $rhs, $additionalFields);
        //If the current data matches the existing data, don't do anything
        if (!$this->checkExisting($dataToInsert))
        {
            $lhsLinkName = $this->lhsLink;
            $rhsLinkName = $this->rhsLink;
            //In a one to one, any existing links from both sides must be removed first.
            //one2Many will take care of the right side, so we'll do the left.
            $lhs->load_relationship($lhsLinkName);
            $this->removeAll($lhs->$lhsLinkName);
            $rhs->load_relationship($rhsLinkName);
            $this->removeAll($rhs->$rhsLinkName);

            return parent::add($lhs, $rhs, $additionalFields);
        }

        // data matched what was there so return false, since nothing happened
        return false;
    }


}
