/* Copyright (C) 2006 Technikum-Wien
 *
 * 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; either version 2 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 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.
 *
 * Authors: Christian Paminger <christian.paminger@technikum-wien.at>,
 *          Andreas Oesterreicher <andreas.oesterreicher@technikum-wien.at> and
 *          Rudolf Hangl <rudolf.hangl@technikum-wien.at>.
 */
/*
 * functions.js.php
 *
 * enthaelt globale JS Funktionen
 */

// ****
// * Liefert den Value aus einer XML-Datasource
// ****
function getTargetHelper(dsource,subj,predi)
{
	if (dsource.hasArcOut(subj, predi))
	{
		var target = dsource.GetTarget(subj, predi, true);
		if (target instanceof Components.interfaces.nsIRDFLiteral ||
			target instanceof Components.interfaces.nsIRDFInt)
		{
			return target.Value;
		}
	}
	return "";
}

// ****
// * Gibt eine Message auf die Javascript Console aus
// ****
function debug(msg)
{
	netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
	 var consoleService = Components.classes["@mozilla.org/consoleservice;1"]
                                 .getService(Components.interfaces.nsIConsoleService);
    consoleService.logStringMessage(msg);
}

// ****
// * Liefert einen Timestamp in Sekunden
// * zum anhaengen an eine URL um Caching zu verhindern
// ****
function gettimestamp()
{
	var now = new Date();
	var ret = now.getHours()*60*60*60;
	ret = ret + now.getMinutes()*60*60;
	ret = ret + now.getSeconds()*60;
	ret = ret + now.getMilliseconds();
	return ret;
}

// ****
// * Parst die Returnwerte der DBDML Scripte
// * @param response ... RDF Response des DBDML Scripts
// *
// * obj.dbdml_return ... Returnwert des Scripts
// * obj.dbdml_errormsg ... Errormessage
// * obj.dbdml_data ... zusaetzliche Daten vom Script. zB ID des angelegten Datansatzes
// ****
function ParseReturnValue(response)
{
	netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
	// Returnwerte aus RDF abfragen
	var dsource=parseRDFString(response, 'http://www.technikum-wien.at/dbdml');

	var rdfService = Components.classes["@mozilla.org/rdf/rdf-service;1"].
	               getService(Components.interfaces.nsIRDFService);
	var subject = rdfService.GetResource("http://www.technikum-wien.at/dbdml/0");

	var predicateNS = "http://www.technikum-wien.at/dbdml/rdf";

	retval = getTargetHelper(dsource, subject, rdfService.GetResource( predicateNS + "#return" ));
	if(retval=='true')
		this.dbdml_return = true;
	else
		this.dbdml_return = false;
	this.dbdml_errormsg = getTargetHelper(dsource, subject, rdfService.GetResource( predicateNS + "#errormsg" ));
	this.dbdml_data = getTargetHelper(dsource, subject, rdfService.GetResource( predicateNS + "#data" ));
	//debug('data:'+this.dbdml_data+' errormsg:'+this.dbdml_errormsg+' return:'+this.dbdml_return );
}

// ****
// * Zeigt einen Text in der Statusbar an
// ****
function SetStatusBarText(text)
{
	document.getElementById('statusbarpanel-text').label=text;
}


// ****
// * Prueft ein Datum auf Gueltigkeit
// * Erlaubte Formate: 1.1.2007, 31.12.2007
// ****
function CheckDatum(datum)
{
	var pattern = /^(0[1-9]|[1-9]|[12][0-9]|3[01])[.](0[1-9]|[1-9]|1[012])[.](19|20)\d\d$/
					
	if(pattern.exec(datum))
		return true;
	else
		return false;
}

// ****
// * Wandelt ein Datum ins ISO Format um
// * aus 31.2.2007 wird 2007-02-31
// ****
function ConvertDateToISO(datum)
{
	if(datum!='')
	{
		arr = datum.split('.');
		
		if(arr[0].length==1)
			arr[0]='0'+arr[0];
			
		if(arr[1].length==1)
			arr[1]='0'+arr[1];
			
		return arr[2]+'-'+arr[1]+'-'+arr[0];
	}
	else
		return '';
}