// requires jQuery
var operationFailed = -1;
function GAjaxManager(options){
    Manager=this;
    this.timer = 0;
         
    // opcje dla managera AJAXowego
    Manager.Options = {
        // domena strony
        Domain: '',
        // URL strony do ktorej bedzie wysylane rzadanie AJAXowe
        URL:        'ajaxpage.aspx',    
        
        // WebPage BID
		BID:        0,              
		
		// nazwa funkcji
		Function:   '',             
		
		// nazwa namespace dla tej funkcji
		NameSpace:  '',             
		
		// funkcja wykonywana do formatowania parametrow przekazywanych dla AJAxa besposrednio ze strony na obiekcie XMLWriter, np: myFunc(XMLWriter){...}
		FormatParams: false,
		
		// zdarzenie wykonywane po wykonaniu porpawnego sie AJAXa lub  false - wowczas nie bedzie wykonywane, np: mySuccess(response){...}
		AfterAjax:	false,
		
		// czy pokazywac znacznik pracy AJAXa - domyslnie wlaczone
		ShowProcessInfo: true
	};
	Manager.Options = $.extend(Manager.Options,options);
    this.showInProcessInfo = function(show){
        if (Manager.Options.ShowProcessInfo){
            var infoDiv = $("#processing");
        
            $(infoDiv).css("position", "fixed");
            $(infoDiv).css("top", ($(window).height() - $(infoDiv).height()) /2);
            $(infoDiv).css("left", ($(window).width() - $(infoDiv).width()) /2);
            
            if (show) $(infoDiv).fadeIn(500);
            else $(infoDiv).fadeOut(500);
         }
    /*
		if (show == true) {
			clearTimeout(Manager.timer);
			$('#processing').hide();
			$('#processing').html("AJAX processing...");
			$('#processing').show();
			
		}
		else {
			$('#processing').hide();
		}		
	*/
	}
	this.showOperationInfo = function (text){
	/*
		$('#processing').html(text);	
		$('#processing').fadeIn(1, function(){			
			Manager.timer = setTimeout("$('#processing').fadeOut(1000)", 1000);			
		});
	*/
	}
	this.normalize = function toHtml(value){ 
        value = value.replace(/</gi,'&lt;');
        value = value.replace(/\>/gi,'&gt;');
        return value;
    }
	this.isInt = function(t) {
		try {
			var y = parseInt(t);			
			if (isNaN(y)) {
				return false;
			}
			return t == y && t.toString() == y.toString();
		}
		catch(ex){			
		}
		return false;
 	} 
 	this.formatRequest = function(){
        var XML=new XMLWriter();
        XML.BeginNode("ajax");
            XML.BeginNode("head");
                XML.Node("BID", Manager.Options.BID);
                XML.Node("namespace",Manager.Options.NameSpace);
                XML.Node("function",Manager.Options.Function);
           XML.EndNode();
           XML.BeginNode("body");  
           if (typeof Manager.Options.FormatParams == 'function') {
				Manager.Options.FormatParams(XML);	
		   }
           XML.EndNode();
        XML.EndNode();
        XML.Close();         
        return XML.ToString();
    }
    this.getXml = function (str) {
        if (window.ActiveXObject) {
            var doc = new ActiveXObject('Microsoft.XMLDOM');
            doc.async=false;
            doc.loadXML(str);
            return doc;
        } else if (window.DOMParser) {
            return (new DOMParser).parseFromString(str, 'text/xml');
        } else
            return str;
    }
    this.getString = function(xml) {
      //for IE 
      if (window.ActiveXObject) {
          return xml.xml;
      }
      // code for Mozilla, Firefox, Opera, etc.
      else {
         return (new XMLSerializer()).serializeToString(xml);
      }
    }
	this.process = function(callback)
	{
		var successFunction = function(result){						
			Manager.showInProcessInfo(false);
			try {
				var t = eval(result);
				// if result is less than 0, it means an error occured														
				if (Manager.isInt(t) == true  && t < 0) { 
					alert("Error: " + t);									
				}	
				else{ // if result is greater than 0 it means operation is succesfull
		            if (typeof Manager.Options.AfterAjax == 'function') {
			            Manager.Options.AfterAjax(result);	
		            }
					if(callback)callback(result);
				}
			}
			catch(ex) {	// if result is string it means operation is succesfull				
	            if (typeof Manager.Options.AfterAjax == 'function') {
		            Manager.Options.AfterAjax(result);	
	            }
				if(callback)callback(result);
			}
		};		
		var _u=Manager.Options.URL;
		if (Manager.Options.Domain != ''){
		    _u=Manager.Options.Domain+'/'+Manager.Options.URL;
		}
	 	$.ajax({
	 	        type: "POST",
				url: _u,
				dataType: 'html',
				data: ({__ajax_param : Manager.normalize(Manager.formatRequest())}), 
				cache:false,
				timeout:100000,
				beforeSend: function(){ Manager.showInProcessInfo(true);  },
				success: successFunction,
				failure: function(result) {								
						Manager.showInProcessInfo(false);
						if (result == operationFailed) {
							alert("Error in ajax.")
						}
				},
				error: function(par1, par2, par3){
					Manager.showInProcessInfo(false);
					alert("Error in ajax..[" + par1 + "][" + par2 + "][" + par3 + "]")
				}
		});
	}
}