
//JCLOZE CORE JAVASCRIPT CODE

function ItemState(){
	this.ClueGiven = false;
	this.HintsAndChecks = 0;
	this.MatchedAnswerLength = 0;
	this.ItemScore = 0;
	this.AnsweredCorrectly = false;
	this.Guesses = new Array();
	return this;
}

var Feedback = '';
var Correct = '[strCorrect]';
var Incorrect = '[strIncorrect]'; 
var GiveHint = '[strGiveHint]';
var CaseSensitive = [boolCaseSensitive];
var YourScoreIs = '[strYourScoreIs]';
var Finished = false;
var Locked = false;
var Score = 0;
var CurrentWord = 0;
var Guesses = '';
var TimeOver = false;

I = new Array();
[strItemArray]

State = new Array();

function StartUp(){
	RemoveBottomNavBarForIE();

[inclSendResults]
	GetUserName();
[/inclSendResults]

[inclPreloadImages]
	PreloadImages([PreloadImageList]);
[/inclPreloadImages]

	var i = 0;

	State.length = 0;
	for (i=0; i<I.length; i++){
		State[i] = new ItemState();
	}
	
	ClearTextBoxes();
	
[inclTimer]
	StartTimer();
[/inclTimer]

}

function ShowClue(ItemNum){
	if (Locked == true){return;}
	State[ItemNum].ClueGiven = true;
	ShowMessage(I[ItemNum][2]);
}

function SaveCurrentAnswers(){
	var Ans = ''
	for (var i=0; i<I.length; i++){
		Ans = GetGapValue(i);
		if ((Ans.length > 0)&&(Ans != State[i].Guesses[State[i].Guesses.length-1])){
			State[i].Guesses[State[i].Guesses.length] = Ans;
		}
	}
}

function CompileGuesses(){
	var F = document.getElementById('store');
	if (F != null){
		var Temp = '<?xml version="1.0"?><hpnetresult><fields>';
		var GapLabel = '';
		for (var i=0; i<State.length; i++){
			GapLabel = 'Gap ' + (i+1).toString();
			Temp += '<field><fieldname>' + GapLabel + '</fieldname>';
			Temp += '<fieldtype>student-responses</fieldtype><fieldlabel>' + GapLabel + '</fieldlabel>';
			Temp += '<fieldlabelid>JClozeStudentResponses</fieldlabelid><fielddata>';
			for (var j=0; j<State[i].Guesses.length; j++){
				if (j>0){Temp += '| ';}
				Temp += State[i].Guesses[j] + ' ';	
			}	
  		Temp += '</fielddata></field>';
		}
		Temp += '</fields></hpnetresult>';
		Detail = Temp;
	}
}

function CheckAnswers(){
	if (Locked == true){return;}
	SaveCurrentAnswers();
	var AllCorrect = true;

//Check each answer
	for (var i = 0; i<I.length; i++){

		if (State[i].AnsweredCorrectly == false){
//If it's right, calculate its score
			if (CheckAnswer(i, true) > -1){
				var TotalChars = GetGapValue(i).length;
				State[i].ItemScore = (TotalChars-State[i].HintsAndChecks)/TotalChars;
				if (State[i].ClueGiven == true){State[i].ItemScore /= 2;}
				if (State[i].ItemScore <0 ){State[i].ItemScore = 0;}
				State[i].AnsweredCorrectly = true;
//Drop the correct answer into the page, replacing the text box
				SetCorrectAnswer(i, GetGapValue(i));
			}
			else{
//Otherwise, increment the hints for this item, as a penalty
				State[i].HintsAndChecks++;

//then set the flag
				AllCorrect = false;
			}
		}
	}

//Calculate the total score
	var TotalScore = 0;
	for (i=0; i<State.length; i++){
		TotalScore += State[i].ItemScore;
	}
	TotalScore = Math.floor((TotalScore * 100)/I.length);

//Compile the output
	Output = '';

	if (AllCorrect == true){
		Output = Correct + '<br />';
	}

	Output += YourScoreIs + ' ' + TotalScore + '%.<br />';
	if (AllCorrect == false){
		Output += '<br />' + Incorrect;
	}
	ShowMessage(Output);
	setTimeout('WriteToInstructions(Output)', 50);
	
	Score = TotalScore;
	CompileGuesses();
	
	if ((AllCorrect == true)||(Finished == true)){
[inclSendResults]
		setTimeout('SendResults(' + TotalScore + ')', 50);
[/inclSendResults]
[inclTimer]
		window.clearInterval(Interval);
[/inclTimer]
		TimeOver = true;
		Locked = true;
		Finished = true;
		setTimeout('Finish()', SubmissionTimeout);
	}
}

function TrackFocus(BoxNumber){
	CurrentWord = BoxNumber;
	InTextBox = true;
}

function LeaveGap(){
	InTextBox = false;
}

function CheckBeginning(Guess, Answer){
	var OutString = '';
	var i = 0;
	var UpperGuess = '';
	var UpperAnswer = '';

	if (CaseSensitive == false) {
		UpperGuess = Guess.toUpperCase();
		UpperAnswer = Answer.toUpperCase();
	}
	else {
		UpperGuess = Guess;
		UpperAnswer = Answer;
	}

	while (UpperGuess.charAt(i) == UpperAnswer.charAt(i)) {
		OutString += Guess.charAt(i);
		i++;
	}
	OutString += Answer.charAt(i);
	return OutString;
}

function GetGapValue(GNum){
	var RetVal = '';
	if ((GNum<0)||(GNum>=I.length)){return RetVal;}
	if (document.getElementById('Gap' + GNum) != null){
		RetVal = document.getElementById('Gap' + GNum).value;
		RetVal = TrimString(RetVal);
	}
	else{
		RetVal = State[GNum].Guesses[State[GNum].Guesses.length-1];
	}
	return RetVal;
}

function SetGapValue(GNum, Val){
	if ((GNum<0)||(GNum>=I.length)){return;}
	if (document.getElementById('Gap' + GNum) != null){
		document.getElementById('Gap' + GNum).value = Val;
		document.getElementById('Gap' + GNum).focus();
	}
}

function SetCorrectAnswer(GNum, Val){
	if ((GNum<0)||(GNum>=I.length)){return;}
	if (document.getElementById('GapSpan' + GNum) != null){
		document.getElementById('GapSpan' + GNum).innerHTML = Val;
	}
}

function FindCurrent() {
	var x = 0;
	FoundCurrent = -1;

//Test the current word:
//If its state is not set to already correct, check the word.
	if (State[CurrentWord].AnsweredCorrectly == false){
		if (CheckAnswer(CurrentWord, false) < 0){
			return CurrentWord;
		}
	}
	
	x=CurrentWord + 1;
	while (x<I.length){
		if (State[x].AnsweredCorrectly == false){
			if (CheckAnswer(x, false) < 0){
				return x;
			}
		}
	x++;	
	}

	x = 0;
	while (x<CurrentWord){
		if (State[x].AnsweredCorrectly == false){
			if (CheckAnswer(x, false) < 0){
				return x;
			}
		}
	x++;	
	}
	return FoundCurrent;
}

function CheckAnswer(GapNum, MarkAnswer){
	var Guess = GetGapValue(GapNum);
	var UpperGuess = '';
	var UpperAnswer = '';
	if (CaseSensitive == false){
		UpperGuess = Guess.toUpperCase();
	}
	else{
		UpperGuess = Guess;
	}
	var Match = -1;
	for (var i = 0; i<I[GapNum][1].length; i++){
		if (CaseSensitive == false){
			UpperAnswer = I[GapNum][1][i][0].toUpperCase();
		}
		else{
			UpperAnswer = I[GapNum][1][i][0];
		}
		if (TrimString(UpperGuess) == UpperAnswer){
			Match = i;
			if (MarkAnswer == true){
				State[GapNum].AnsweredCorrectly = true;
			}
		}
	}
	return Match;
}

function GetHint(GapNum){
	Guess = GetGapValue(GapNum);

	if (CheckAnswer(GapNum, false) > -1){return ''}
	RightBits = new Array();
	for (var i=0; i<I[GapNum][1].length; i++){
		RightBits[i] = CheckBeginning(Guess, I[GapNum][1][i][0]);
	}
	var RightOne = FindLongest(RightBits);
	var Result = I[GapNum][1][RightOne][0].substring(0,RightBits[RightOne].length);
//Add another char if the last one is a space
	if (Result.charAt(Result.length-1) == ' '){
		Result = I[GapNum][1][RightOne][0].substring(0,RightBits[RightOne].length+1);
	}
	return Result;
}

function ShowHint(){
	if (Locked == true){return;}
	var CurrGap = FindCurrent();
	if (CurrGap < 0){return;}

	var HintString = GetHint(CurrGap);

	if (HintString.length > 0){
		SetGapValue(CurrGap, HintString);
		State[CurrGap].HintsAndChecks += 1;
	}
	ShowMessage(GiveHint);
}

function TypeChars(Chars){
	var CurrGap = FindCurrent();
	if (CurrGap < 0){return;}
	if (document.getElementById('Gap' + CurrGap) != null){
		SetGapValue(CurrGap, document.getElementById('Gap' + CurrGap).value + Chars);
	}
}

[inclTimer]
function TimesUp() {
	document.getElementById('Timer').innerHTML = '[strTimesUp]';
[inclPreloadImages]
	RefreshImages();
[/inclPreloadImages]
	TimeOver = true;
	Finished = true;
	CheckAnswers();
	Locked = true;
}
[/inclTimer]