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Quiz.pde
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Quiz.pde
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class Quiz {
ArrayList<Question> questions;
ArrayList<ClozeTest> clozeTests;
QuizState state;
boolean answersConfirmed;
int currQuestion;
IntList selectedAnswers;
StringList clozeAnswerValues;
int score;
int maxScore;
int availableTime;
ProcessingTimer timer;
QuizCallback endCallback;
Quiz(ArrayList<Question> questions, ArrayList<ClozeTest> clozeTests, int availableTime, QuizCallback endCallback) {
this.questions = questions;
this.clozeTests = clozeTests;
this.availableTime = availableTime;
this.state = QuizState.INITIAL;
this.currQuestion = 0;
this.score = 0;
this.selectedAnswers = new IntList();
this.endCallback = endCallback;
this.timer = new ProcessingTimer(new TimerCallback() {
@Override
void expired() {
state = QuizState.TIMEUP;
getCallback().onEnd(state);
}
});
// Caluclate max reachable score
for (Question question : questions) {
this.maxScore += question.solutions.size();
}
for (ClozeTest clozeTest : clozeTests) {
this.maxScore += clozeTest.solutions.size();
}
this.maxScore *= 10;
}
QuizCallback getCallback() {
return endCallback;
}
String getCurrQuestion() {
if (currQuestion < questions.size()) {
return this.questions.get(currQuestion).questionTitle;
}
return null;
}
String getCurrAnswer(int answer) {
if (currQuestion < questions.size()) {
return this.questions.get(currQuestion).answers.get(answer);
}
return null;
}
StringList getCurrClozeTextSnippets() {
if (currQuestion >= questions.size()) {
return this.clozeTests.get(currQuestion - questions.size()).textSnippets;
}
return null;
}
StringList getCurrClozeSolutions() {
if (currQuestion >= questions.size()) {
return this.clozeTests.get(currQuestion - questions.size()).solutions;
}
return null;
}
void reset() {
this.currQuestion = 0;
this.selectedAnswers = new IntList();
this.score = 0;
this.state = QuizState.INITIAL;
this.answersConfirmed = false;
this.timer.cancel();
}
void start() {
this.state = QuizState.QUESTIONS;
this.currQuestion = 0;
this.selectedAnswers.clear();
this.timer.start(availableTime);
}
void selectAnswer(int answer) {
selectedAnswers.append(answer);
}
void deselectAnswer(int answer) {
selectedAnswers.removeValue(answer);
}
ValidationResult confirmAnswers() {
ValidationResult result = questions.get(currQuestion).validate(selectedAnswers);
score += result.amountCorrect * 10;
score -= result.amountFalse * 5;
// Clamp Score > 0
if (score < 0) {score = 0;}
timer.subtract(result.amountFalse * 10 * 1000);
answersConfirmed = true;
return result;
}
IntList validateCloze() {
IntList result = clozeTests.get(currQuestion - questions.size()).validate(clozeAnswerValues);
score += result.size() * 10;
return result;
}
void endQuiz() {
this.state = QuizState.DONE;
getCallback().onEnd(state);
timer.pause();
}
void nextQuestion() {
switch (this.state) {
case QUESTIONS:
if (currQuestion < questions.size() - 1) {
currQuestion++;
answersConfirmed = false;
selectedAnswers = new IntList();
}
else if (! clozeTests.isEmpty()) {
this.state = QuizState.CLOZETESTS;
currQuestion++;
initializeClozeTest();
getCallback().onStartClozeTests();
}
else {
endQuiz();
}
break;
case CLOZETESTS:
if (currQuestion < questions.size() + clozeTests.size() - 1) {
currQuestion++;
initializeClozeTest();
} else {
endQuiz();
}
break;
}
}
void initializeClozeTest() {
clozeAnswerValues = new StringList();
for (int i = 0; i < clozeTests.get(currQuestion - questions.size()).solutions.size(); i++) {
clozeAnswerValues.append("");
}
}
}
interface QuizCallback {
void onEnd(QuizState reason);
void onStartClozeTests();
}
enum QuizState {
INITIAL, QUESTIONS, CLOZETESTS, TIMEUP, DONE;
}