<?php
// Copyright (C) 2010 Combodo SARL
//
//   This program is free software; you can redistribute it and/or modify
//   it under the terms of the GNU General Public License as published by
//   the Free Software Foundation; version 3 of the License.
//
//   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, write to the Free Software
//   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

/**
 * Specific page to build the XML data describing the "relation" around a given seed object
 * This XML is desgined to be consumed by the Flash Navigator object (see ../navigator folder)
 *
 * @author      Erwan Taloc <erwan.taloc@combodo.com>
 * @author      Romain Quetiez <romain.quetiez@combodo.com>
 * @author      Denis Flaven <denis.flaven@combodo.com>
 * @license     http://www.opensource.org/licenses/gpl-3.0.html LGPL
 */

require_once('../application/application.inc.php');
require_once('../application/webpage.class.inc.php');
require_once('../application/ajaxwebpage.class.inc.php');
require_once('../application/wizardhelper.class.inc.php');
require_once('../application/ui.linkswidget.class.inc.php');

define('MAX_RECURSION_DEPTH', 20);

/**
 * Fills the given XML node with te details of the specified object
 */ 
function AddNodeDetails(&$oNode, $oObj)
{
	$aZlist = MetaModel::GetZListItems(get_class($oObj), 'details');
	$aLabels = array();
	$index = 0;
	foreach($aZlist as $sAttCode)
	{
		$oAttDef = MetaModel::GetAttributeDef(get_class($oObj), $sAttCode);
		$aLabels[] = $oAttDef->GetLabel();
		if (!$oAttDef->IsLinkSet())
		{
			$oNode->SetAttribute('att_'.$index, $oObj->Get($sAttCode));
		}
		$index++;
	}
	$oNode->SetAttribute('zlist', implode(',', $aLabels));
}

/**
 * Get the related objects through the given relation
 * @param DBObject $oObj The current object
 * @param string $sRelation The name of the relation to search with
 */
function GetRelatedObjects(DBObject $oObj, $sRelationName, &$oLinks, &$oXmlDoc, &$oXmlNode)
{
	$oContext = new UserContext();
	$aResults = array();
	$oObj->GetRelatedObjects($sRelationName, 1 /* iMaxDepth */, $aResults);
	static $iDepth = 0;
	$iDepth++;
	if ($iDepth > MAX_RECURSION_DEPTH) return;
	
	foreach($aResults as $sRelatedClass => $aObjects)
	{
		foreach($aObjects as $id => $oTargetObj)
		{
			if (is_object($oTargetObj))
			{
				$oLinkingNode =   $oXmlDoc->CreateElement('link');
				$oLinkingNode->SetAttribute('relation', $sRelationName);
				$oLinkingNode->SetAttribute('arrow', 1); // Such relations have a direction, display an arrow
				$oLinkedNode = $oXmlDoc->CreateElement('node');
				$oLinkedNode->SetAttribute('id', $oTargetObj->GetKey());
				$oLinkedNode->SetAttribute('obj_class', get_class($oTargetObj));
				$oLinkedNode->SetAttribute('name', $oTargetObj->GetName());
				$oLinkedNode->SetAttribute('icon', BuildIconPath($oTargetObj->GetIcon()));
				AddNodeDetails($oLinkedNode, $oTargetObj);
				$oSubLinks = $oXmlDoc->CreateElement('links');
				GetRelatedObjects($oTargetObj, $sRelationName, $oSubLinks, $oXmlDoc, $oLinkedNode);
				$oLinkingNode->AppendChild($oLinkedNode);
				$oLinks->AppendChild($oLinkingNode);
			}
		}
	}
	if (count($aResults) > 0)
	{
		$oXmlNode->AppendChild($oLinks);
	}
}

function BuildIconPath($sIconPath)
{
	$sFullURL = utils::GetAbsoluteURL(false, false);
	$iLastSlashPos = strrpos($sFullURL, '/');
	$sFullURLPath = substr($sFullURL, 0, 1 + $iLastSlashPos);
	return $sFullURLPath.$sIconPath;
}

require_once('../application/startup.inc.php');
require_once('../application/loginwebpage.class.inc.php');
//// For developping the Navigator
//session_start();
//$_SESSION['auth_user'] = 'admin';
//$_SESSION['auth_pwd'] = 'admin2';
//UserRights::Login($_SESSION['auth_user'], $_SESSION['auth_pwd']); // Set the user's language
LoginWebPage::DoLogin(); // Check user rights and prompt if needed

$oPage = new ajax_page("");
$oPage->no_cache();

$oContext = new UserContext();
$sClass = utils::ReadParam('class', 'Contact');
$id = utils::ReadParam('id', 1);
$sRelation = utils::ReadParam('relation', 'impacts');
$aValidRelations = MetaModel::EnumRelations();

if (!in_array($sRelation, $aValidRelations))
{
	// Not a valid relation, use the default one instead
	$sRelation = 'impacts';
}

if ($id != 0)
{
	$oObj = $oContext->GetObject($sClass, $id);
	// Build the root XML part
	$oXmlDoc = new DOMDocument( '1.0', 'UTF-8' );
	$oXmlRoot = $oXmlDoc->CreateElement('root');
	$oXmlNode = $oXmlDoc->CreateElement('node');
	$oXmlNode->SetAttribute('id', $oObj->GetKey());
	$oXmlNode->SetAttribute('obj_class', get_class($oObj));
	$oXmlNode->SetAttribute('name', $oObj->GetName());
	$oXmlNode->SetAttribute('icon', BuildIconPath($oObj->GetIcon())); // Hard coded for the moment
	AddNodeDetails($oXmlNode, $oObj);
	
	$oLinks = $oXmlDoc->CreateElement("links");

	$oXmlRoot->SetAttribute('position', 'left');
	$oXmlRoot->SetAttribute('title', MetaModel::GetRelationDescription($sRelation).' '.$oObj->GetName());
	GetRelatedObjects($oObj, $sRelation, $oLinks, $oXmlDoc, $oXmlNode);
	
	$oXmlRoot->AppendChild($oXmlNode);
	$oXmlDoc->AppendChild($oXmlRoot);
	$oPage->add($oXmlDoc->SaveXML());
}
$oPage->output();
?>