/*
/*
 * Copyright (C) 2003,2004 by 4system Polska Sp. z o.o.
 * All Rights Reserved.
 */

var PAGETYPE_UNKNOWN = "Unknown";
var PAGETYPE_INFORMATION = "Information";
var PAGETYPE_EXERCISE = "Exercise";
var PAGETYPE_HIDDEN = "Hidden";
var PAGETYPE_POLL = "Poll";

var PAGESTATUS_NOT_ATTEMPTED = "N";
var PAGESTATUS_INCOMPLETE = "I";
var PAGESTATUS_COMPLETED = "C";
var PAGESTATUS_PASSED = "P";
var PAGESTATUS_FAILED = "F";

var KEY_SEP = "#|#";

var CHAR_A_CODE = 97;

UELODDCalculator = function()
{
	var namesList = new Array();
}

UELODDCalculator.prototype.setNamesList = function(s)
{
	this.namesList = new Array();
	var list = s.split(":");
	for (var i = 0; i < list.length; i++)
	{
		var items = list[i].split("|");
		for (var j = 0; j < items.length; j++) 
		{
			var ex = false;
			for (var k = 0; k < this.namesList.length; k++)
			{
				if (this.namesList[k] == items[j])
				{
					ex = true;
					break;
				}
			}
			if (!ex) 
			{
				this.namesList[this.namesList.length] = items[j];
			}
		}
	}
}

UELODDCalculator.prototype.getNameCode = function(name)
{
	for (var i = 0; i < this.namesList.length; i++)
	{
		if (this.namesList[i] == name)
		{
			return String.fromCharCode(CHAR_A_CODE + i);
		}
	}
	return "";
}

UELODDCalculator.prototype.transform = function(ss, s)
{
	this.setNamesList(ss);
	var r = "{";
	if (s.length != 0)
	{
		var sr = s.split(":");
		for (var i = 0; i < sr.length; i++)
		{
			if (r.length > 1) r += ",";
			r += String.fromCharCode(CHAR_A_CODE + i) + ".";
			r += this.getNameCode(sr[i]);
		}
	}
	r += "}";
	return r;
}

UELODDCalculator.prototype.transformToPermutation = function(ss, s)
{
	this.setNamesList(ss);
	var g = new Array();
	var list = s.split(":");
	for (var i = 0; i < list.length; i++)
	{
		g[i] = new Array();
		var items = list[i].split("|");
		if (i == 0) {
			for (var k = 0; k < items.length; k++) 
			{
				g[i][g[i].length] = {"index":items[k],"parent":-1};
			}
		} else {
			for (var j = 0; j < g[i - 1].length; j++)
			{
				for (var k = 0; k < items.length; k++) 
				{
					g[i][g[i].length] = {"index":items[k],"parent":j};
				}
			}
		}
	}
	var res = "";
	for (var i = 0; i < g[g.length - 1].length; i++)
	{
		var p = g.length - 1;
		var mod = "";
		if (res.length > 0) res += ";"
		res += "{";
		var item = g[g.length - 1][i];
		mod += String.fromCharCode(CHAR_A_CODE + p) + "." + this.getNameCode(item["index"]);
		p--;
		var parent = item["parent"];
		for (var j = g.length - 2; j >= 0; j--)
		{
			mod = String.fromCharCode(CHAR_A_CODE + p) + "." + this.getNameCode(g[j][parent]["index"]) + "," + mod;
			parent = g[j][parent]["parent"]
			p--;
		}
		res += mod + "}";
	}	
	return (res);
}

/*
  *
  *
  */
UELOInteractions = function()
{
	this.id = "";
	this.correctResponses = "";
	this.time = "";
	this.type = "";
	this.weighting = "";
	this.studentResponse = "";
	this.status = "N";
	this.result = "";
	this.maxScore = 0;
	this.score = 0;
	this.question = "";
	this.latency = null;
	this.tryNumber=0;
	this.maxTryNumber=0;
};

UELOInteractions.prototype.AddCorrectResponses = function(pattern)
{
	var p = this.FindCorrectResponses(pattern);
	if (p == null)
	{
		p = this.correctResponses[this.correctResponses.length] = pattern; 
	}
	return p;
};

UELOInteractions.prototype.FindCorrectResponses = function(pattern)
{
	for (var i = 0; i < this.correctResponses.length; i++)
	{
		if (this.correctResponses[i] == pattern)
		{
			return this.correctResponses[i];
		}
	}
	return null;
};

UELOInteractions.prototype.setValue = function(name, value)
{
	// wyjatki do poprawinie i ujednolicenia
	if (name == "answers") name = "studentResponse";
	if (name == "group") name = "id";
	
	if (typeof(this[name]) == "undefined") return;
	
	if (name == "status"){
		if(value=='P') this['result']=true;
		else this['result']=false;
	}
	
	if (typeof(this[name]) == "number" || typeof(this[name]) == "string" || typeof(this[name]) == "boolean"){
		this[name] = value;
	}
};

UELOInteractions.prototype.getValue = function(name)
{
	return (typeof(this[name] != "undefined")) ? this[name] : null;
}

UELOInteractions.prototype.setResult = function(value)
{
	if(value==true){
		this.result=true;
		this.status='P';
		this.score=1;
	}else{
		this.result=false;
		this.status='F';
		this.score=0;
	}
	
};

/*
  *
  *
  */
UELOPage = function()
{
	this.pageId = "";
	this.scoId = "";
	this.type = -1;
	this.pageType = PAGETYPE_UNKNOWN;
	this.status = PAGESTATUS_NOT_ATTEMPTED;
	this.title = "";
	this.globalIndex = -1;
	this.pageVisited = 0;
	this.chapterName = "";
	this.correctResponses = new Array();
	this.interactions = new Array();
};

UELOPage.prototype.setValue = function(name, value)
{
	// wyjatki do poprawinie i ujednolicenia
	if (typeof(this[name]) == "undefined") return;	
	
	if (typeof(this[name]) == "number" || typeof(this[name]) == "string" || typeof(this[name]) == "boolean"){
		
		this[name] = value;
	}
};

UELOPage.prototype.AddInteraction = function(elementId, question, correctResponses, maxScore, tryNumber, maxTryNumber, type)
{
	/*
	if (elementType.indexOf('Light',0) > 0){
		elementType=elementType.substring(0,elementType.indexOf('Light',0));
	}
	*/
	var interId = this.FormatInteractionId(elementId, this.globalIndex);
	var inter = this.FindInteraction(interId);
	if (inter == null)
	{	
		var inter = this.interactions[this.interactions.length] = new UELOInteractions();
		inter.id = interId;
		inter.question = question || "";
		inter.maxScore = maxScore || "";
		inter.maxTryNumber = maxTryNumber || "";
		inter.correctResponses = correctResponses || "";
		inter.type = type || "";
		return  inter;
	} else {
		return inter;
	}
};

UELOPage.prototype.FindInteraction = function(interId)
{
	//alert('1:'+interId+', il= '+this.interactions.length);
	for (var i = 0; i < this.interactions.length; i++)
	{
		var inter = this.interactions[i];
		if (inter.id == interId)
		{
			return inter;
		}
	}
	return null;
}

UELOPage.prototype.FormatInteractionId = function(elementId, pageGlobalIndex)
{
	return elementId + "_" + pageGlobalIndex;
}

/*
  *
  *
  */
UELO = function()
{
	this.pages = new Array();

	this.keySep = KEY_SEP;
	
	this.scoId = "";
	this.courseName = "";
	this.courseDescription = "";
	
	this.username = "";
	this.password = "";
	this.organisation = "";
	this.server = "";
	this.percentCompleted = "";
	this.pagesCount = 0;
	this.exercisePagesCount = 0;
	this.pagesVisited = 0;
	this.pointsMax = 100;
	this.points = 0;
	this.passThreshold = 100;
	this.beginTime = new Date();
	this.endTime = new Date();
	this.sessionTime = 0;
	this.userVars = "";
	this.lastVisitedPage = 0;
	this.saveUelo = 0;
	this.showUserAnswers = true;
	
	this.writeValuesList = new Array("organisation", "username", "password", "server", "percentCompleted", "pagesVisited", "pointsMax", "points", "passThreshold",  "beginTime", "endTime", "courseName", "courseDescription","keySep","userVars","lastVisitedPage","score");
}

UELO.prototype.AddPage = function()
{
	var p = new UELOPage();
	this.pages[this.pages.length] = p;
	this.pagesCount++;
	return p;
}

//parent.UELO.LoadFromForm(string textAreaName) - wczytuje wartosci z TextArea na formularzu
UELO.prototype.LoadFromForm = function(textAreaName)
{

}

//String parent.UELO.getHeaderString(String Name) - daje text z naglowka 
UELO.prototype.GetHeaderString = function(name)
{
	for (var k in this)
	{
		var type = typeof(this[k]);
		if (type == "number" || type == "string" || type == "boolean" || type == "object")
		{
			return this[k];
		}
	}
	return null;
}

UELO.prototype.setHeaderString = function(name, value)
{
	///!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
	/// wyjatki do poprawinie i ujednolicenia
	if (name == "Server_for_check_Answers") name = "server";
	
	var f = new RegExp("^" + name + "$", "gi");
	for (var k in this)
	{
		if (k.match(f))
		{
			for (var j = 0; j < this.writeValuesList.length; j++)
			{
				if (this.writeValuesList[j].toLowerCase() == k.toLowerCase())
				{
					if (typeof(this[k]) == "number" || typeof(this[k]) == "string" || typeof(this[k]) == "boolean")
					{
						this[k] = value;
						return;
					}
					if (typeof(this[k]) == "object" && (k == "beginTime" || k == "endTime")) 
					{
						this[k] = this.stringToDate(value);
						return;
					}
				}
			}
		}
	}
}

//String parent.UELO.getDataStringByID(int PageId;String ColumnName) - daje text z danych linia szukajac po PageId
UELO.prototype.GetDataStringByID = function(pageId, name)
{

}

//String parent.UELO.getDataStringByIdx(int RowIdx;String ColumnName) - daje text z danych linia RowIdx
UELO.prototype.GetDataStringByIdx = function(rowIdx, columnName)
{

}

//String parent.UELO.getDataStringByName(String PageName;String ColumnName) - daje text z danych linia szukajac po PageId
UELO.prototype.GetDataStringByName = function(pageName, columnName)
{

}

//int parent.UELO.getDataRowCount() - daje ilosc linii
UELO.prototype.GetDataRowCount = function()
{

}

//String parent.UELO.setDataStringByID(int PageID;String ColumnName,String value)
UELO.prototype.SetDataStringByID = function(pageID, columnName, value)
{

}

UELO.prototype.setPageStatus = function(pageGlobalIndex,newPageStatus)
{
	var p = this.FindPage(pageGlobalIndex);
	if(p){
		p.status = newPageStatus;
		for (var i = 0; i < p.interactions.length; i++)
		{
			var inter = p.interactions[i];
			if (inter.status == 'N') inter.status = newPageStatus;
		}				
	}
}

UELO.prototype.updateUELOFromSD = function(statusString)
{
	var arr = statusString.split(",");
	for (var i = 0; i < arr.length; i++) {
			this.setPageStatus(struct.getGIX(i+2),arr[i]);
	}
}

UELO.prototype.getLastVisitedPage = function()
{
	if (this.lastVisitedPage != 0) return this.lastVisitedPage
	var lastPage = null;
	for (var i = 0; i < this.pages.length; i++) {
		if(this.pages[i].status == 'I'){
			this.pages[i].globalIndex;
		}else if(this.pages[i].status == 'N'){
			return lastPage;
		}
		lastPage = this.pages[i].globalIndex;
	}
	return lastPage;
}

UELO.prototype.setLastVisitedPage = function(pageNo)
{
	this.lastVisitedPage = pageNo;
}

UELO.prototype.getPageIndexInStruct = function(pageGlobalIndex)
{
	for (var i = 0; i < this.pages.length; i++) {
		if(this.pages[i].globalIndex == pageGlobalIndex) return i;
	}
}

UELO.prototype.getPageStatus = function(pageGlobalIndex)
{
	var p = this.FindPage(pageGlobalIndex);
	if(p){
		return p.status;
	}
}

UELO.prototype.setPageVisited = function(pageGlobalIndex)
{
	var p = this.FindPage(pageGlobalIndex);
	if(p){
		this.setLastVisitedPage(pageGlobalIndex);
		p.pageVisited = 1;
	}
	this.setPercentCompleted();
}

UELO.prototype.setPercentCompleted = function()
{
	var allPages=this.getPagesCount(null);
	var visitedPages=this.getPagesVisitedCount('VISITED');
	var pagesC=''+((visitedPages*100)/allPages);
	if(pagesC.indexOf('.')>0) pagesC=pagesC.substr(0,pagesC.indexOf('.')+3);
	//alert(allPages+', '+visitedPages+', '+pagesC);
	this.percentCompleted = pagesC;	
}

UELO.prototype.getPagesCount = function(pageType)
{
	var exCnt = 0;
	var infCnt = 0;
	var fullCnt = 0;
	var visCnt = 0;
	//if(!pageType) return this.pages.length;
	
	for (var i = 0; i < this.pages.length; i++) {		
		if(this.pages[i].pageType==PAGETYPE_HIDDEN) continue;
		if (this.pages[i].pageType == PAGETYPE_EXERCISE) exCnt++;
		else infCnt++;
		fullCnt++;
	}
	
	if(!pageType) return fullCnt; 
	if (pageType=PAGETYPE_EXERCISE) return exCnt;
	else return infCnt;
}

UELO.prototype.getPointsMax = function()
{
	var retScore=0;
	for (var i = 0; i < this.pages.length; i++)
	{		
		var page = this.pages[i];
		if(page.pageType==PAGETYPE_HIDDEN) continue;
		if(page.pageType==PAGETYPE_EXERCISE){
			for (var j = 0; j < page.interactions.length; j++)
			{
				var inter = page.interactions[j];
				retScore += parseInt(inter.maxScore);
			}
		}
	}
	return retScore;
}


UELO.prototype.getPagesVisitedCount = function()
{
	var visCnt = 0;
	
	for (var i = 0; i < this.pages.length; i++) {		
		if(this.pages[i].pageType==PAGETYPE_HIDDEN) continue;
		if (this.pages[i].pageVisited == 1) visCnt++;
	}
	return visCnt;
}


UELO.prototype.getCourseScore = function()
{
	var retScore=0;
	for (var i = 0; i < this.pages.length; i++)
	{		
		var page = this.pages[i];
		if(page.pageType==PAGETYPE_HIDDEN) continue;
		if(page.pageType==PAGETYPE_EXERCISE){
			for (var j = 0; j < page.interactions.length; j++)
			{
				var inter = page.interactions[j];
				if(inter.status=="P") retScore += parseInt(inter.score);
			}
		}
	}
	return retScore;
}

UELO.prototype.getCourseStatus = function()
{
	if(this.getPagesCount()!=this.getPagesVisitedCount()) return 1;
	else return 0;
}


UELO.prototype.FindPage = function(pageGlobalIndex)
{
	for (var i = 0; i < this.pages.length; i++) {		
		if (this.pages[i].globalIndex == pageGlobalIndex) {
			return this.pages[i]
		}		
	}
	return null;
}

UELO.prototype.AddInteractionToPage = function(pageGlobalIndex,elementId)
{
	var iterPage=this.FindPage(pageGlobalIndex);
	if(iterPage==null) return null;
	return iterPage.AddInteraction(elementId);
}

UELO.prototype.findInteraction = function(pageGlobalIndex, elementId)
{
	var iterPage = this.FindPage(pageGlobalIndex);
	if(iterPage == null) return null;	
	return iterPage.FindInteraction(elementId);
}

//String parent.UELO.setDataStringByID(int PageID;String ColumnName,String value)
UELO.prototype.GetStudentAnswer = function(pageGlobalIndex, elementId)
{
	var iterPage=this.FindPage(pageGlobalIndex);
	if(iterPage==null) return null;
	var interId = iterPage.FormatInteractionId(elementId, iterPage.globalIndex);
	var iter=iterPage.FindInteraction(interId);
	if(iter==null) return null;
	return iter.studentResponse;
}

UELO.prototype.setUELOData = function()
{
	this.endTime = new Date();
	this.sessionTime = this.calculateTimeToString(this.beginTime, new Date());	
}

UELO.prototype.toWBTSString = function()
{
	var r = "";
	r += "[UniversalElearningDataObjectHeader]\n";
	r += "Organisation=" + this.organisation + "\n";
	r += "Username=" + this.username + "\n";
	r += "Password=" + this.password + "\n";
	r += "ServerForCheckAnswers=" + this.server + "\n";
	r += "PercentCompleted=" + this.percentCompleted + "\n";
	r += "PagesCount=" + this.getPagesCount(null) + "\n";
	r += "ExercisePagesCount=" + this.getPagesCount(PAGETYPE_EXERCISE) + "\n";
	r += "PagesVisited=" + this.getPagesVisitedCount() + "\n";
	r += "PointsMax=" + this.getPointsMax() + "\n";
	r += "Points=" + this.points + "\n";
	r += "PassThreshold=" + this.passThreshold + "\n";
	r += "BeginTime=" + this.dateTimeToString(this.beginTime) + "\n";
	r += "EndTime=" + this.dateTimeToString(this.endTime) + "\n";
	r += "SessionTime=" + this.calculateTimeToString(this.beginTime, this.endTime) + "\n";
	r += "KeySep=" + this.keySep + "\n";
	r += "userVars=" + this.getUserVars() + "\n";
	r += "lastVisitedPage=" + this.getLastVisitedPage() + "\n";	
	r += "\n";
	r += "[UniversalElearningDataObjectDataFormat]" + "\n";
	r += "sco_identifier" + this.keySep + "page_identifier" + this.keySep + "globalPageIndex"+ this.keySep + "chapterName" + this.keySep + "group" + this.keySep + "question" + this.keySep + "answers"+ this.keySep + "maxScore" + this.keySep + "score" + this.keySep + "tryNumber" + this.keySep + "maxTryNumber" + this.keySep + "status" + this.keySep + "pageType" + "\n";
	r += "\n";
	r += "[UniversalElearningDataObjectData]" + "\n";
	
	for (var i = 0; i < this.pages.length; i++)
	{
		var page = this.pages[i];
		if(page.pageType==PAGETYPE_HIDDEN) continue;
		if(page.pageType==PAGETYPE_EXERCISE){
			for (var j = 0; j < page.interactions.length; j++)
			{
				var inter = page.interactions[j];
				r += uelo.scoId + this.keySep + page.pageId + this.keySep + page.globalIndex + this.keySep + page.chapterName + this.keySep + inter.id + this.keySep + inter.question + this.keySep + inter.studentResponse + this.keySep + inter.maxScore  + this.keySep + inter.score + this.keySep + inter.tryNumber + this.keySep + inter.maxTryNumber + this.keySep + inter.status + this.keySep + "E \n";
			}
		}else if(page.pageType==PAGETYPE_POLL){
			for (var j = 0; j < page.interactions.length; j++)
			{
				var inter = page.interactions[j];
				r += uelo.scoId + this.keySep + page.pageId + this.keySep + page.globalIndex + this.keySep + page.chapterName + this.keySep + inter.id + this.keySep + inter.question + this.keySep + inter.studentResponse + this.keySep + inter.maxScore  + this.keySep + inter.score + this.keySep + inter.tryNumber + this.keySep + inter.maxTryNumber + this.keySep + inter.status + this.keySep + "P \n";
			}			
		}else{
			//var pStatus="N";
			r += uelo.scoId + this.keySep + page.pageId + this.keySep + page.globalIndex + this.keySep + page.chapterName + this.keySep + this.keySep + this.keySep + this.keySep+ "1" + this.keySep + "0" + this.keySep + "0" + this.keySep + "0" + this.keySep + page.status + this.keySep + "I \n";
		}
	}
	
	return r;
}

UELO.prototype.toFullString = function()
{
	var r = "";
	r += "[UniversalElearningDataObjectHeader]\n";
	r += "ScoId=" + this.scoId + "\n";
	r += "CourseName=" + this.courseName + "\n";
	r += "CourseDescription=" + this.courseDescription + "\n";
	r += "Organisation=" + this.organisation + "\n";
	r += "Username=" + this.username + "\n";
	r += "Password=" + this.password + "\n";
	r += "ServerForCheckAnswers=" + this.server + "\n";
	r += "PercentCompleted=" + this.percentCompleted + "\n";
	r += "PagesCount=" + this.getPagesCount(null) + "\n";
	r += "ExercisePagesCount=" + this.getPagesCount(PAGETYPE_EXERCISE) + "\n";
	r += "PagesVisited=" + this.getPagesVisitedCount() + "\n";
	r += "PointsMax=" + this.getPointsMax() + "\n";
	r += "Points=" + this.points + "\n";
	r += "PassThreshold=" + this.passThreshold + "\n";
	r += "BeginTime=" + this.dateTimeToString(this.beginTime) + "\n";
	r += "EndTime=" + this.dateTimeToString(this.endTime) + "\n";
	r += "SessionTime=" + this.calculateTimeToString(this.beginTime, this.endTime) + "\n";
	r += "KeySep=" + this.keySep + "\n";
	r += "userVars=" + this.getUserVars() + "\n";
	r += "lastVisitedPage=" + this.getLastVisitedPage() + "\n";	
	r += "\n";
	r += "[UniversalElearningDataObjectDataFormat]" + "\n";
	r += "sco_identifier" + this.keySep + "page_identifier" + this.keySep + "globalPageIndex" + this.keySep + "group" + this.keySep + "question" + this.keySep + "answers" + this.keySep + "maxScore" + this.keySep + "score" + this.keySep + "status" + this.keySep + "pageType" + "\n";
	r += "\n";
	r += "[UniversalElearningDataObjectData]" + "\n";
	
	for (var i = 0; i < this.pages.length; i++)
	{
		var page = this.pages[i];
		r += "\n";
		r += "[UniversalElearningDataObjectDataPage]" + "\n";
		r += page.pageId + this.keySep + page.scoId+ this.keySep + page.type+ this.keySep + page.pageType+ this.keySep + page.status+ this.keySep + page.title+ this.keySep + page.globalIndex+ "\n";
		for (var j = 0; j < page.interactions.length; j++)
		{
			var inter = page.interactions[j];
			r += "    [UniversalElearningDataObjectDataPageInteraction]" + "\n";
			r += "    "+inter.id + this.keySep + inter.correctResponses + this.keySep + inter.studentResponse + this.keySep + inter.time + this.keySep + inter.type + this.keySep + inter.weighting + this.keySep + inter.status + this.keySep + inter.result + this.keySep + inter.maxScore + this.keySep + inter.score + this.keySep + inter.question + this.keySep + inter.latency + "\n";
		}
	}
	
	return r;
}

// To jest metoda która tłumaczy z formatu UELO do normy HACP
// generalnie CUDA na KIJU ;) tam sie dzieja

var _CORRECT_RESPONSES = 1;
var _STUDENT_RESPONSE = 2;

UELO.prototype.formatResponseToHACPFormat = function(mode, inter)
{
	var s = "";
	if (mode == _CORRECT_RESPONSES)
	{
		s = inter.correctResponses;
	}
	else if (mode == _STUDENT_RESPONSE)
	{
		s = inter.studentResponse;
	}
	else
	{
		return null;
	}
	
	var type = inter.type.toLowerCase();
	if (typeof(s) == "string" && type == "choice")
	{
		var r = s;
		var arr = s.split(":");
		if (arr.length > 1)
		{
			var r = "{";
			for (var i = 0; i < arr.length; i++)
			{
				if (arr[i] == "1")
				{
					if (r.length > 1) r += ",";
					r += String.fromCharCode(97 + i);
				}
			}
			r += "}";
		}
		return r;
	} 
	else if (type == "numeric")
	{
		// sa takie przypadki ze komponent przedstawia sie jako "numeric"
		// a dane dostaracza takie jak "choice" - aw
		if (typeof(s) == "string")
		{
			var arr = s.split(":");
			if (arr.length > 0)
			{
				var r = "";
				for (var i = 0; i < arr.length; i++)
				{
					if (arr[i] == "1")
					{
						return i;
					}
				}
			}
			return s;
		}
		return s.toString();
	}
	else if (type == "fill-in")
	{
		s = s.replace(/\|\|/gi, "; ");
		return s;
	}
	else if (type == "matching")
	{
//		var list = inter.correctResponses.split(":");
		var calc = new UELODDCalculator();

		if (mode == _CORRECT_RESPONSES)
		{
			return calc.transformToPermutation(inter.correctResponses, inter.correctResponses);
		}
		else if (mode == _STUDENT_RESPONSE)
		{
			return calc.transform(inter.correctResponses, inter.studentResponse);
		}
		return r;
	}
	return s;
}

UELO.prototype.toHACPInteractionsString = function(course_id, student_id, lesson_id)
{
	var r = "";
	var d = new Date();
	r += '"course_id","student_id","lesson_id","date","time","interaction_id","objective_id","type_interaction","correct_response","student_response","result","weighting","latency"\n';
	for (var i = 0; i < this.pages.length; i++)
	{
		var page = this.pages[i];
		for (var j = 0; j < page.interactions.length; j++)
		{
			var inter = page.interactions[j];
			r += '"' + course_id + '"'; //course_id
			r += ',"'+ student_id +'"'; //student_id
			r += ',"0"'; //lesson_id
			r += ',"'+this.dateToString(d, "/")+'"'; // date
			r += ',"'+this.timeToString(d)+'"'; // time
			r += ',"p_' + i + '_e_' + j + '"'; // interaction_id  -> r += ',"'+inter.id+'"'; // interaction_id
			r += ',""'; // objective_id
			r += ',"'+inter.type+'"'; // type_interaction
			r += ',"'+this.formatResponseToHACPFormat(_CORRECT_RESPONSES, inter)+'"'; // correct_response
			r += ',"'+this.formatResponseToHACPFormat(_STUDENT_RESPONSE, inter)+'"'; // student_response
			r += ',"'+((inter.result == true)?"c":"w")+'"'; // result
			r += ',"1.0"'; // weighting
			r += ',"'+((inter.latency == null)?"00:00:00":inter.latency)+'"'; // latency
			r += '\n';
		}
	}
	return r;
}

UELO.prototype.calculateTimeToString = function(dateStart, dateEnd)
{
  var dd = Math.abs( dateEnd.getTime() - dateStart.getTime() );
  var ts = Math.floor( ( ( (dd % (60 * 60 * 1000 * 24) ) % (60 * 60 * 1000) ) % ( 60 * 1000 ) ) / 1000 * 1 );
  var tm = Math.floor( (dd % (60 * 60 * 1000 * 24)) % ((60 * 60 * 1000)) / (60 * 1000) );
  var th = Math.floor( (dd % (60 * 60 * 1000 * 24)) / (60 * 60 * 1000) );

  var sh = ((th < 10) ? "0" : "") + th;
  var sm = ((tm < 10) ? "0" : "") + tm;
  var ss = ((ts < 10) ? "0" : "") + ts;

  return ("" + sh + ":" + sm + ":" + ss);
};

UELO.prototype.dateToString = function(date, separator)
{
	if (typeof(separator) == "undefined")
	{
		separator = "-";
	}
	var day = date.getDate();
	var month = date.getMonth() + 1;
	var year = date.getFullYear();
	var day = ((day < 10) ? "0" : "") + day;
	var month = ((month < 10) ? "0" : "") + month;
	return (year + separator + month + separator + day);
};

UELO.prototype.timeToString = function(date)
{
  var ts = date.getSeconds();
  var tm = date.getMinutes();
  var th = date.getHours();
  var th = ((th < 10) ? "0" : "") + th;
  var tm = ((tm < 10) ? "0" : "") + tm;
  var ts = ((ts < 10) ? "0" : "") + ts;

  return ("" + th + ":" + tm + ":" + ts);
};

UELO.prototype.dateTimeToString = function(date)
{
  var ts = date.getSeconds();
  var tm = date.getMinutes();
  var th = date.getHours();
  var th = ((th < 10) ? "0" : "") + th;
  var tm = ((tm < 10) ? "0" : "") + tm;
  var ts = ((ts < 10) ? "0" : "") + ts;
  
  var day = date.getDate();
  var month = date.getMonth() + 1;
  var year = date.getFullYear();
  var day = ((day < 10) ? "0" : "") + day;
  var month = ((month < 10) ? "0" : "") + month;
  var year = ((year < 10) ? "0" : "") + year;

  return (year + "-" + month + "-" + day + " " + th + ":" + tm + ":" + ts);
};

UELO.prototype.stringToDate = function(s)
{
	var r = new RegExp("(\\d{4})-(\\d{2})-(\\d{2}) (\\d{2}):(\\d{2}):(\\d{2})");
	var a = s.match(r);
	return (a.length == 7) ? new Date(a[1], parseInt(a[2]) - 1, a[3], a[4], a[5], a[6]) : new Date();
}

UELO.prototype.toString = function()
{
	return this.toFullString();
}

UELO.prototype.__parseFindGroup = function(a, name)
{
	var key = new RegExp("^\\[" + name + "\\]$", "i");
	for (var i = 0; i < a.length; i++)
	{
		if (a[i].match(key)) 
		{
			return i;
		}
	}
	return null;
}

UELO.prototype.loadFromString = function(s)
{
	s = s.replace(new RegExp("\r", "g"), "");
	var lines = s.split("\n");
	//header
	var index = this.__parseFindGroup(lines, "UniversalElearningDataObjectHeader");
	if (index == null) 
	{
		return;
	}
	
	var i = index;
	while (i++ < lines.length - 1)
	{
		var p = lines[i].indexOf("=");
		if (p > 0)
		{
			var key = lines[i].slice(0, p);
			var value = lines[i].slice(p + 1);
			this.setHeaderString(key, value);
		} else {
			break;
		}
	}
	var index = this.__parseFindGroup(lines, "UniversalElearningDataObjectDataFormat");
	if (index == null) 
	{
		return;
	}

	var keyMatrix = lines[index + 1].split(this.keySep);
	var gpi = -1; // globalPageIndex
	var eii = -1;  // elementIdIndex
	var dataPageType = -1; // pageType
	var dataPageId = -1; // pageId
	for (var j = 0; j < keyMatrix.length; j++)
	{
		//alert(keyMatrix[j]);
		if (keyMatrix[j].match(new RegExp("^globalPageIndex$", "gi")))
		{
			gpi = j;
		}
		if (keyMatrix[j].match(new RegExp("^group$", "gi")))
		{
			eii = j;
		}
		if (keyMatrix[j].match(new RegExp("^pageType$", "gi")))
		{
			dataPageType = j;
		}
		if (keyMatrix[j].match(new RegExp("^page_identifier$", "gi")))
		{
			dataPageId = j;
		}
		
	}
	//alert('dataPageType='+dataPageType);
	if (gpi == -1 || eii == -1)
	{
		return;
	}


	var index = this.__parseFindGroup(lines, "UniversalElearningDataObjectData");
	if (index == null) 
	{
		return;
	}
	var i = index;	
	while (i++ < lines.length - 1)
	{
		var data = lines[i].split(this.keySep);
		
		//if (data.length != keyMatrix.length) alert(data+'::'+data.length+'::'+keyMatrix.length+'::'+i);
		if (data.length == keyMatrix.length)
		{
			var o = this.findInteraction(data[gpi], data[eii]);
			var ueloPage = this.FindPage(data[gpi]);
			//alert(data[gpi]+", "+data[eii]);
			if(!o){ 
				//var ueloPage = this.FindPage(data[gpi]);				
				if(!ueloPage){ 
					//alert('0::'+data[dataPageType]+'::'+data[dataPageType].indexOf('E'));
					ueloPage= this.AddPage();
					ueloPage.type = 0;
					if(data[dataPageType].indexOf('E')>=0){
						ueloPage.pageType = PAGETYPE_EXERCISE;
					}else if(data[dataPageType].indexOf('P')>=0){
						ueloPage.pageType = PAGETYPE_POLL;
					}else{
						ueloPage.pageType = PAGETYPE_INFORMATION;
					}
					ueloPage.pageId = data[dataPageId];
					ueloPage.globalIndex = data[gpi];	
					if((ueloPage.pageType == PAGETYPE_EXERCISE) || (ueloPage.pageType == PAGETYPE_POLL)){
						o = ueloPage.interactions[ueloPage.interactions.length] = new UELOInteractions();
					}else{
						//
					}
				}
				if(ueloPage){
					//o = ueloPage.interactions[ueloPage.interactions.length] = new UELOInteractions();
				}
			}else{
				//alert('Wrong data!!!: '+data);
			}
			
			if (ueloPage){
				for (var j = 0; j < keyMatrix.length; j++){
					if (j != gpi && j != eii && j != dataPageType){
						//alert(keyMatrix[j]+"::"+data[j]);
						ueloPage.setValue(keyMatrix[j], data[j]);
					}
				}			
			}
			
			if (o){
				for (var j = 0; j < keyMatrix.length; j++){
					if (j != gpi){
						//alert(keyMatrix[j]+"::"+data[j]);
						o.setValue(keyMatrix[j], data[j]);
					}
				}
			}
		}
	}
}

UELO.prototype.getChapters = function(){
	var chapters = new Array();
	var chapterPageName = "";
	for (var i = 0; i < this.pages.length; i++) {
		var p = this.pages[i];
		if (chapterPageName != p.chapterName){
			if (this.courseName != p.chapterName){
					chapters[chapters.length] = p.chapterName;
			}
			chapterPageName = p.chapterName;
		}
	}
	return chapters;
}

UELO.prototype.getPagesInChapter = function(chName){
	var chapterPages = new Array();
	for (var i = 0; i < this.pages.length; i++) {
		var p = this.pages[i];
		if (p.chapterName == chName){
			if (this.courseName != p.chapterName){
					chapterPages[chapterPages.length] = p.globalIndex;
			}
		}
	}
	return chapterPages;
}

UELO.prototype.getUserVars = function(){
	return this.userVars;
}

UELO.prototype.setUserVars = function(uVars){
	this.userVars = uVars;
}


var uelo = new UELO();