/**
 * @copyright Rapidshare AG, 2008
 * www.rapidshare.com
 * @author Laurentiu Nat & saso nikolov
 * History: 13.04.2009 - dbogatz:   Möglichkeit von Synchronen Aufrufen hinzugefügt.
 * 
 * Beispiel: 
 *   RSAjax({
            url:'ttt.php',
            method:'POST',
            //textXML:'text',
            str:'arg=123&bbb=654',          
            onSuccess: function(h){
                alert(h.responseText)
            },
            onLoading: function(){
                document.getElementById('display').style.display=""
            },
            asynchron: false
        });
 */
function RSAjax(obj){
    var a=new RS__Ajax();
    a.ladeParameter(obj);
    return RS__getAjax(a);
}
function RS__Ajax(){
    this.method = 'GET';
    this.onLoading = function(){};
    this.onSuccess = function() { };
    this.onError = function() { alert("ERROR in " + this.url) };
    this.url = null;
    this.str = null;
    this.response = null;
    this.textXML = 'text';
    this.hatLoading=false;
    this.hatSuccess=false;
    this.istAsynchron   =   true;   //  default asynchroner Request
    this.sendFirstForm = false; // if str is empty
    this.xmlHttp = null;

    this.ladeParameter = function(obj){
        this.method = (typeof obj.method != "undefined" || obj.method == 'POST') ? obj.method : 'GET';
        if (typeof obj.url != "undefined") {
                this.url = obj.url;
        }
        else
            alert('Bitte url eingeben');
        
        if(obj.asynchron==false)    {
            this.istAsynchron   =   false;
        }
        
        if(typeof obj.onSuccess =="function"){
            this.onSuccess=obj.onSuccess;
            this.hatSuccess=true;
        }

        if (typeof obj.onLoading == "function") {
            this.onLoading = obj.onLoading;
            this.hatLoading=true;
        }

        if (typeof obj.textXML == "undefined" || (obj.textXML != 'text' && obj.textXML != 'xml'))
            this.textXML = 'text';
        else
            this.textXML = obj.textXML;

        if (typeof obj.str != "undefined")
            this.str = obj.str;
        else if (obj.sendFirstForm) {
            // welche methode wird verwendet? post or get, diese noch einstelln
            var array = new Array();
            var ff = document.forms[0];
            for (var i = 0; i < ff.length; i++) {
                try {
                    if (ff[i].value)
                        array[array.length] = ff.name + '=' + ff[i].value;
                }
                catch (e) {
                }
            }
            this.str = array.join('&');
        }
    }
}
function RS__getAjax(ob, async_request) {
    if (typeof XMLHttpRequest != 'undefined') { ob.xmlHttp = new XMLHttpRequest(); }
    if (!ob.xmlHttp) {
        try { ob.xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); }
        catch (e) {
            try { ob.xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); }
            catch (e) { ob.xmlHttp = null; }
        }
    }
    if (ob.xmlHttp == null) {
        alert('Es ist ein Verbindungsproblem aufgetreten. Bitte versuchen Sie es erneut....');
        return;
    }
    if (ob.xmlHttp) {
        if (ob.method == "GET") {
            if (ob.str) {
                ob.str = ob.str.replace(/^\s+|\s+$/g, '');
                if (ob.str != "") {
                    if (ob.url.indexOf("?") == -1) {
                        ob.url += "?";
                    } else if (ob.url[ob.url.length - 1] != "&") {
                        ob.url += "&";
                    }
                    if (ob.str.substr(0, 1) == "&")
                        ob.str = ob.str.substr(1);
                    ob.url += ob.str;
                }
                ob.str = null;
            }
        } else {
            // prüfe ob in der URL parameter enthalten sind
            // diese dann an die str hängen
            if (ob.url.indexOf("?") != -1) {
                var pos = ob.url.indexOf("?");
                var sstr = ob.url.substr(pos + 1);
                ob.url = ob.url.substr(0, pos);
                if (ob.str != "")
                    ob.str += "&";
                ob.str += sstr;
            }
        }
        try {
            ob.xmlHttp.open(ob.method, ob.url, ob.istAsynchron);
        } catch (e) {
            ob.onError();
            return false;
        }
        //  onreadystatechange nur notwendig wenn ein asynchroner request gestartet wurde:
        if (ob.istAsynchron)
        {
            ob.xmlHttp.onreadystatechange = function() {
                if (ob.xmlHttp.readyState == 2 && ob.hatLoading) {
                    ob.onLoading();
                }
                if (ob.xmlHttp.readyState == 4) {
                    if (ob.hatSuccess) {
                        ob.onSuccess(ob.xmlHttp)
                    }
                }
            }
        }                
        if (ob.method == "POST")
            ob.xmlHttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
        ob.xmlHttp.send(ob.str);
        //  Bei Synchronen Requests haben wir das Ergebnis gleich hier:
        if(!ob.istAsynchron)
        {
            if (ob.xmlHttp.readyState == 4) {
                if (ob.hatSuccess) {
                    return ob.onSuccess(ob.xmlHttp)
                }
                else return ob.xmlHttp;
            }
        }
    }
}