/**
	* 	@desc: constructor, data processor object 
	*	@param: serverProcessorURL - url used for update
	*	@type: public
	*/
function dataProcessor(serverProcessorURL){
    this.serverProcessor = serverProcessorURL;
    this.action_param="!nativeeditor_status";
    
	this.object = null;
	this.updatedRows = []; //ids of updated rows
	
	this.autoUpdate = true;
	this.updateMode = "cell";
	this._tMode="GET"; 
	this.post_delim = "_";
	
    this._waitMode=0;
    this._in_progress={};//?
    this._invalid={};
    this.mandatoryFields=[];
    this.messages=[];
    
    this.styles={
    	updated:"font-weight:bold;",
    	inserted:"font-weight:bold;",
    	deleted:"text-decoration : line-through;",
    	invalid:"background-color:FFE0E0;",
    	invalid_cell:"border-bottom:2px solid red;",
    	error:"color:red;",
    	clear:"font-weight:normal;text-decoration:none;"
    };
    
    this.enableUTFencoding(true);
    dhtmlxEventable(this);

    return this;
    }

dataProcessor.prototype={
	/**
	* 	@desc: select GET or POST transaction model
	*	@param: mode - GET/POST
	*	@param: total - true/false - send records row by row or all at once (for grid only)
	*	@type: public
	*/
	setTransactionMode:function(mode,total){
        this._tMode=mode;
		this._tSend=total;
    },
    escape:function(data){
    	if (this._utf)
    		return encodeURIComponent(data);
    	else
        	return escape(data);
	},
    /**
	* 	@desc: allows to set escaping mode
	*	@param: true - utf based escaping, simple - use current page encoding
	*	@type: public
	*/	
	enableUTFencoding:function(mode){
        this._utf=convertStringToBoolean(mode);
    },
    /**
	* 	@desc: allows to define, which column may trigger update
	*	@param: val - array or list of true/false values
	*	@type: public
	*/
	setDataColumns:function(val){
		this._columns=(typeof val == "string")?val.split(","):val;
    },
    /**
	* 	@desc: get state of updating
	*	@returns:   true - all in sync with server, false - some items not updated yet.
	*	@type: public
	*/
	getSyncState:function(){
		return !this.updatedRows.length;
	},
	/**
	* 	@desc: enable/disable named field for data syncing, will use column ids for grid
	*	@param:   mode - true/false
	*	@type: public
	*/
	enableDataNames:function(mode){
		this._endnm=convertStringToBoolean(mode);
	},
	/**
	* 	@desc: enable/disable mode , when only changed fields and row id send to the server side, instead of all fields in default mode
	*	@param:   mode - true/false
	*	@type: public
	*/
	enablePartialDataSend:function(mode){
		this._changed=convertStringToBoolean(mode);
	},
	/**
	* 	@desc: set if rows should be send to server automaticaly
	*	@param: mode - "row" - based on row selection changed, "cell" - based on cell editing finished, "off" - manual data sending
	*	@type: public
	*/
	setUpdateMode:function(mode,dnd){
		this.autoUpdate = (mode=="cell");
		this.updateMode = mode;
		this.dnd=dnd;
	},
	ignore:function(code,master){
		this._silent_mode=true;
		code.call(master||window);
		this._silent_mode=false;
	},
	/**
	* 	@desc: mark row as updated/normal. check mandatory fields,initiate autoupdate (if turned on)
	*	@param: rowId - id of row to set update-status for
	*	@param: state - true for "updated", false for "not updated"
	*	@param: mode - update mode name
	*	@type: public
	*/
	setUpdated:function(rowId,state,mode){
		if (this._silent_mode) return;
		var ind=this.findRow(rowId);
		
		mode=mode||"updated";
		var existing = this.obj.getUserData(rowId,this.action_param);
		if (existing && mode == "updated") mode=existing;
		if (state){
			this.set_invalid(rowId,false); //clear previous error flag
			this.updatedRows[ind]=rowId;
			this.obj.setUserData(rowId,this.action_param,mode);
			if (this._in_progress[rowId]) 
				this._in_progress[rowId]="wait";
		} else{
			if (!this.is_invalid(rowId)){
				this.updatedRows.splice(ind,1);
				this.obj.setUserData(rowId,this.action_param,"");
			}
		}

		//clear changed flag
		if (!state)
			this._clearUpdateFlag(rowId);
     			
		this.markRow(rowId,state,mode);
		if (state && this.autoUpdate) this.sendData(rowId);
	},
	_clearUpdateFlag:function(id){},
	markRow:function(id,state,mode){ 
		var str="";
		var invalid=this.is_invalid(id);
		if (invalid){
        	str=this.styles[invalid];
        	state=true;
    	}
		if (this.callEvent("onRowMark",[id,state,mode,invalid])){
			//default logic
			str=this.styles[state?mode:"clear"]+str;
			
        	this.obj[this._methods[0]](id,str);

			if (invalid && invalid.details){
				str+=this.styles[invalid+"_cell"];
				for (var i=0; i < invalid.details.length; i++)
					if (invalid.details[i])
        				this.obj[this._methods[1]](id,i,str);
			}
		}
	},
	getState:function(id){
		return this.obj.getUserData(id,this.action_param);
	},
	is_invalid:function(id){
		return this._invalid[id];
	},
	set_invalid:function(id,mode,details){ 
		if (details) mode={value:mode, details:details, toString:function(){ return this.value.toString(); }};
		this._invalid[id]=mode;
	},
	/**
	* 	@desc: check mandatory fields and varify values of cells, initiate update (if specified)
	*	@param: rowId - id of row to set update-status for
	*	@type: public
	*/
	checkBeforeUpdate:function(rowId){ 
		return true;
	},
	/**
	* 	@desc: send row(s) values to server
	*	@param: rowId - id of row which data to send. If not specified, then all "updated" rows will be send
	*	@type: public
	*/
	sendData:function(rowId){
		if (this._waitMode && (this.obj.mytype=="tree" || this.obj._h2)) return;
		if (this.obj.editStop) this.obj.editStop();
	
		
		if(typeof rowId == "undefined" || this._tSend) return this.sendAllData();
		if (this._in_progress[rowId]) return false;
		
		this.messages=[];
		if (!this.checkBeforeUpdate(rowId) && this.callEvent("onValidatationError",[rowId,this.messages])) return false;
		this._beforeSendData(this._getRowData(rowId),rowId);
    },
    _beforeSendData:function(data,rowId){
    	if (!this.callEvent("onBeforeUpdate",[rowId,this.getState(rowId),data])) return false;	
		this._sendData(data,rowId);
    },
    serialize:function(data, id){
    	if (typeof data == "string")
    		return data;
    	if (typeof id != "undefined")
    		return this.serialize_one(data,"");
    	else{
    		var stack = [];
    		var keys = [];
    		for (var key in data)
    			if (data.hasOwnProperty(key)){
    				stack.push(this.serialize_one(data[key],key+this.post_delim));
    				keys.push(key);
				}
    		stack.push("ids="+this.escape(keys.join(",")));
    		return stack.join("&");
    	}
    },
    serialize_one:function(data, pref){
    	if (typeof data == "string")
    		return data;
    	var stack = [];
    	for (var key in data)
    		if (data.hasOwnProperty(key))
    			stack.push(this.escape((pref||"")+key)+"="+this.escape(data[key]));
		return stack.join("&");
    },
    _sendData:function(a1,rowId){
    	if (!a1) return; //nothing to send
		if (!this.callEvent("onBeforeDataSending",rowId?[rowId,this.getState(rowId),a1]:[null, null, a1])) return false;				
		
    	if (rowId)
			this._in_progress[rowId]=(new Date()).valueOf();
		var a2=new dtmlXMLLoaderObject(this.afterUpdate,this,true);
		
		var a3 = this.serverProcessor+(this._user?(getUrlSymbol(this.serverProcessor)+["dhx_user="+this._user,"dhx_version="+this.obj.getUserData(0,"version")].join("&")):"");

		if (this._tMode!="POST")
        	a2.loadXML(a3+((a3.indexOf("?")!=-1)?"&":"?")+this.serialize(a1,rowId));
		else
        	a2.loadXML(a3,true,this.serialize(a1,rowId));

		this._waitMode++;
    },
	sendAllData:function(){
		if (!this.updatedRows.length) return;			

		this.messages=[]; var valid=true;
		for (var i=0; i<this.updatedRows.length; i++)
			valid&=this.checkBeforeUpdate(this.updatedRows[i]);
		if (!valid && !this.callEvent("onValidatationError",["",this.messages])) return false;
	
		if (this._tSend) 
			this._sendData(this._getAllData());
		else
			for (var i=0; i<this.updatedRows.length; i++)
				if (!this._in_progress[this.updatedRows[i]]){
					if (this.is_invalid(this.updatedRows[i])) continue;
					this._beforeSendData(this._getRowData(this.updatedRows[i]),this.updatedRows[i]);
					if (this._waitMode && (this.obj.mytype=="tree" || this.obj._h2)) return; //block send all for tree
				}
	},
    
	
	
	
	
	
	
	
	_getAllData:function(rowId){
		var out={};
		var has_one = false;
		for(var i=0;i<this.updatedRows.length;i++){
			var id=this.updatedRows[i];
			if (this._in_progress[id] || this.is_invalid(id)) continue;
			if (!this.callEvent("onBeforeUpdate",[id,this.getState(id)])) continue;	
			out[id]=this._getRowData(id,id+this.post_delim);
			has_one = true;
			this._in_progress[id]=(new Date()).valueOf();
		}
		return has_one?out:null;
	},
	
	
	/**
	* 	@desc: specify column which value should be varified before sending to server
	*	@param: ind - column index (0 based)
	*	@param: verifFunction - function (object) which should verify cell value (if not specified, then value will be compared to empty string). Two arguments will be passed into it: value and column name
	*	@type: public
	*/
	setVerificator:function(ind,verifFunction){
		this.mandatoryFields[ind] = verifFunction||(function(value){return (value!="");});
	},
	/**
	* 	@desc: remove column from list of those which should be verified
	*	@param: ind - column Index (0 based)
	*	@type: public
	*/
	clearVerificator:function(ind){
		this.mandatoryFields[ind] = false;
	},
	
	
	
	
	
	findRow:function(pattern){
		var i=0;
    	for(i=0;i<this.updatedRows.length;i++)
		    if(pattern==this.updatedRows[i]) break;
	    return i;
    },

   
	


    





	/**
	* 	@desc: define custom actions
	*	@param: name - name of action, same as value of action attribute
	*	@param: handler - custom function, which receives a XMl response content for action
	*	@type: private
	*/
	defineAction:function(name,handler){
        if (!this._uActions) this._uActions=[];
            this._uActions[name]=handler;
	},




	/**
*     @desc: used in combination with setOnBeforeUpdateHandler to create custom client-server transport system
*     @param: sid - id of item before update
*     @param: tid - id of item after up0ate
*     @param: action - action name
*     @type: public
*     @topic: 0
*/
	afterUpdateCallback:function(sid, tid, action, btag) {
		var marker = sid;
		var correct=(action!="error" && action!="invalid");
		if (!correct) this.set_invalid(sid,action);
		if ((this._uActions)&&(this._uActions[action])&&(!this._uActions[action](btag))) 
			return (delete this._in_progress[marker]);
			
		if (this._in_progress[marker]!="wait")
	    	this.setUpdated(sid, false);
	    	
	    var soid = sid;
	
	    switch (action) {
	    case "inserted":
	    case "insert":
	        if (tid != sid) {
	            this.obj[this._methods[2]](sid, tid);
	            sid = tid;
	        }
	        break;
	    case "delete":
	    case "deleted":
	    	this.obj.setUserData(sid, this.action_param, "true_deleted");
	        this.obj[this._methods[3]](sid);
	        delete this._in_progress[marker];
	        return this.callEvent("onAfterUpdate", [sid, action, tid, btag]);
	        break;
	    }
	    
	    if (this._in_progress[marker]!="wait"){
	    	if (correct) this.obj.setUserData(sid, this.action_param,'');
	    	delete this._in_progress[marker];
    	} else {
    		delete this._in_progress[marker];
    		this.setUpdated(tid,true,this.obj.getUserData(sid,this.action_param));
		}
	    
	    this.callEvent("onAfterUpdate", [sid, action, tid, btag]);
	},

	/**
	* 	@desc: response from server
	*	@param: xml - XMLLoader object with response XML
	*	@type: private
	*/
	afterUpdate:function(that,b,c,d,xml){
		xml.getXMLTopNode("data"); //fix incorrect content type in IE
		if (!xml.xmlDoc.responseXML) return;
		var atag=xml.doXPath("//data/action");
		for (var i=0; i<atag.length; i++){
        	var btag=atag[i];
			var action = btag.getAttribute("type");
			var sid = btag.getAttribute("sid");
			var tid = btag.getAttribute("tid");
			
			that.afterUpdateCallback(sid,tid,action,btag);
		}
		that.finalizeUpdate();
	},
	finalizeUpdate:function(){
		if (this._waitMode) this._waitMode--;
		
		if ((this.obj.mytype=="tree" || this.obj._h2) && this.updatedRows.length) 
			this.sendData();
		this.callEvent("onAfterUpdateFinish",[]);
		if (!this.updatedRows.length)
			this.callEvent("onFullSync",[]);
	},




	
	/**
	* 	@desc: initializes data-processor
	*	@param: anObj - dhtmlxGrid object to attach this data-processor to
	*	@type: public
	*/
	init:function(anObj){
		this.obj = anObj;
		if (this.obj._dp_init) 
			this.obj._dp_init(this);
	},
	
	
	setOnAfterUpdate:function(ev){
		this.attachEvent("onAfterUpdate",ev);
	},
	enableDebug:function(mode){
	},
	setOnBeforeUpdateHandler:function(func){  
		this.attachEvent("onBeforeDataSending",func);
	},



	/*! starts autoupdate mode
		@param interval
			time interval for sending update requests
	*/
	setAutoUpdate: function(interval, user) {
		interval = interval || 2000;
		
		this._user = user || (new Date()).valueOf();
		this._need_update = false;
		this._loader = null;
		this._update_busy = false;
		
		this.attachEvent("onAfterUpdate",function(sid,action,tid,xml_node){
			this.afterAutoUpdate(sid, action, tid, xml_node);
		});
		this.attachEvent("onFullSync",function(){
			this.fullSync();
		});
		
		var self = this;
		window.setInterval(function(){
			self.loadUpdate();
		}, interval);
	},


	/*! process updating request answer
		if status == collision version is depricated
		set flag for autoupdating immidiatly
	*/
	afterAutoUpdate: function(sid, action, tid, xml_node) {
		if (action == 'collision') {
			this._need_update = true;
			return false;
		} else {
			return true;
		}
	},


	/*! callback function for onFillSync event
		call update function if it's need
	*/
	fullSync: function() {
		if (this._need_update == true) {
			this._need_update = false;
			this.loadUpdate();
		}
		return true;
	},


	/*! sends query to the server and call callback function
	*/
	getUpdates: function(url,callback){
		if (this._update_busy) 
			return false;
		else
			this._update_busy = true;
		
		this._loader = this._loader || new dtmlXMLLoaderObject(true);
		
		this._loader.async=true;
		this._loader.waitCall=callback;
		this._loader.loadXML(url);
	},


	/*! returns xml node value
		@param node
			xml node
	*/
	_v: function(node) {
		if (node.firstChild) return node.firstChild.nodeValue;
		return "";
	},


	/*! returns values array of xml nodes array
		@param arr
			array of xml nodes
	*/
	_a: function(arr) {
		var res = [];
		for (var i=0; i < arr.length; i++) {
			res[i]=this._v(arr[i]);
		};
		return res;
	},


	/*! loads updates and processes them
	*/
	loadUpdate: function(){
		var self = this;
		var version = this.obj.getUserData(0,"version");
		var url = this.serverProcessor+getUrlSymbol(this.serverProcessor)+["dhx_user="+this._user,"dhx_version="+version].join("&");
		url = url.replace("editing=true&","");
		this.getUpdates(url, function(){
			var vers = self._loader.doXPath("//userdata");
			self.obj.setUserData(0,"version",self._v(vers[0]));
			
			var upds = self._loader.doXPath("//update");
			if (upds.length){
				self._silent_mode = true;
				
				for (var i=0; i<upds.length; i++) {
					var status = upds[i].getAttribute('status');
					var id = upds[i].getAttribute('id');
					var parent = upds[i].getAttribute('parent');
					switch (status) {
						case 'inserted':
							self.callEvent("insertCallback",[upds[i], id, parent]);
							break;
						case 'updated':
							self.callEvent("updateCallback",[upds[i], id, parent]);
							break;
						case 'deleted':
							self.callEvent("deleteCallback",[upds[i], id, parent]);
							break;
					}
				}
				
				self._silent_mode = false;
			}
			
			self._update_busy = false;
			self = null;
		});
	}

};

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