/* build up a session attribute, currentQuestionHTML, containing the HTML for *ALL*
* the questions.
* set session attribute lastQuestion to true so that only one page of questions is displayed.
*/
void onePageQuiz(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
HttpSession session = request.getSession();
Boolean alreadyAnswered = (Boolean) session.getAttribute(Constants.session_lastQuestionBool);
Vector<Integer> quizQuestions =
(Vector<Integer>)
session.getAttribute(Constants.session_quizQuestions); // need to initialize this
ArrayList<Feedback> feedbacks = new ArrayList<Feedback>();
if (alreadyAnswered) {
Integer score = 0;
String feedback = "";
int i = 1;
for (Integer questionI : quizQuestions) {
Question question =
mysqlManager.getQuestion(
request,
session,
questionI,
(java.sql.Connection)
(request.getServletContext().getAttribute(Constants.context_Connection)));
score += question.scoreAnswer(request);
Feedback f =
new Feedback(
question.displayQuestion(),
question.getFeedback(request),
question.scoreAnswer(request),
i);
feedbacks.add(f);
feedback += "<br>Question " + i + ":<br> " + question.getFeedback(request);
i++;
}
session.setAttribute(Constants.session_allFeedbackObjs, feedbacks);
session.setAttribute(Constants.session_allFeedback, feedback);
session.setAttribute(Constants.session_currentScore, score);
RequestDispatcher dispatcher = request.getRequestDispatcher("quizTakenSummary.jsp");
dispatcher.forward(request, response);
} else {
String allHTML = "<form action = \"questionServlet\" method = \"post\">";
for (Integer questionI : quizQuestions) {
Question question =
mysqlManager.getQuestion(
request,
session,
questionI,
(java.sql.Connection)
(request.getServletContext().getAttribute(Constants.context_Connection)));
allHTML += question.displayQuestion();
allHTML += "<br><br>";
}
allHTML += "<input type=\"submit\" value=\"submit\">";
allHTML += "</form>";
session.setAttribute(Constants.session_lastQuestionBool, true);
session.setAttribute(Constants.session_questionHTML, allHTML);
RequestDispatcher dispatcher = request.getRequestDispatcher("showQuestion.jsp");
dispatcher.forward(request, response);
}
}
/*
* score the previous question and add its
*/
void scorePreviousAnswer(HttpSession session, HttpServletRequest request) {
Integer previousQuestionIndex =
(Integer) session.getAttribute(Constants.session_currentQuestionIndex);
Integer score = (Integer) session.getAttribute(Constants.session_currentScore);
Question prevQuestion = (Question) session.getAttribute(Constants.session_currentQuestion);
if (prevQuestion != null) score += prevQuestion.scoreAnswer(request);
if (((Quiz) session.getAttribute(Constants.session_currentQuiz)).immediateFeedback) {
if (prevQuestion != null)
session.setAttribute(Constants.session_previousFeedback, prevQuestion.getFeedback(request));
}
String allFeedback = (String) session.getAttribute(Constants.session_allFeedback);
ArrayList<Feedback> allFeedbacks =
(ArrayList<Feedback>) session.getAttribute(Constants.session_allFeedbackObjs);
if (allFeedbacks == null) allFeedbacks = new ArrayList<Feedback>();
if (prevQuestion != null) {
Feedback f =
new Feedback(
prevQuestion.displayQuestion(),
prevQuestion.getFeedback(request),
prevQuestion.scoreAnswer(request),
previousQuestionIndex);
allFeedbacks.add(f);
session.setAttribute(Constants.session_previousFeedbackObj, f);
}
session.setAttribute(Constants.session_allFeedbackObjs, allFeedbacks);
if (allFeedback != null) allFeedback += "<br><br> " + prevQuestion.getFeedback(request);
else if (prevQuestion != null) allFeedback = "<br><br> " + prevQuestion.getFeedback(request);
else allFeedback = "";
session.setAttribute(Constants.session_allFeedback, allFeedback);
session.setAttribute(Constants.session_currentScore, score);
}
void multiplePageQuiz(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
HttpSession session = request.getSession();
Object previousAnswer = session.getAttribute(Constants.session_previousAnswer);
Integer previousQuestionIndex =
(Integer) session.getAttribute(Constants.session_currentQuestionIndex);
Integer currentQuestionIndex = previousQuestionIndex + 1;
Vector<Integer> quizQuestions =
(Vector<Integer>)
session.getAttribute(Constants.session_quizQuestions); // need to initialize this
// if (previousAnswer != null && previousQuestionIndex >= 0)
scorePreviousAnswer(session, request);
String form = "";
if (currentQuestionIndex == quizQuestions.size()) {
form += "<form action=\"quizTakenSummary.jsp\" method=\"post\">";
form += "<input type=\"submit\" value=\"Finish quiz\">";
form += "</form>";
session.setAttribute(Constants.session_lastQuestionBool, true);
} else {
form += "<form action=\"questionServlet\" method=\"post\">";
session.setAttribute(Constants.session_currentQuestionIndex, currentQuestionIndex);
System.out.println(
"getting from quizQuestions at index "
+ currentQuestionIndex
+ " with length"
+ quizQuestions.size());
Integer currentQuestionpKey = quizQuestions.get(currentQuestionIndex);
Question question =
mysqlManager.getQuestion(
request,
session,
currentQuestionpKey,
(java.sql.Connection)
(request.getServletContext().getAttribute(Constants.context_Connection)));
session.setAttribute(Constants.session_currentQuestion, question);
form += question.displayQuestion();
form += "<input type=\"submit\" value=\"Next question\">";
form += "</form>";
session.setAttribute(Constants.session_lastQuestionBool, false);
}
session.setAttribute(Constants.session_questionHTML, form);
}