/**
* find the grade of a particular topic based on its difficulty level
*
* @param userId
* @param topic
* @param difficulty
* @return averageQuizGrade
* @throws Exception
*/
public static double findTopicDifficultyGrade(int userId, String topic, String difficulty)
throws Exception {
QuizAttempt quizAttempt = new QuizAttempt();
ArrayList<Integer> userQuizIds = quizAttempt.getUserQuizIds(userId);
ArrayList<Double> userQuizGrades = new ArrayList<Double>();
for (int i = 0; i < userQuizIds.size(); i++) {
QuizSlot quizSlot = new QuizSlot();
// get the question ids of questions belonging to a particular quiz
ArrayList<Integer> questionIds =
quizSlot.getDifficultyAndTopicWiseQuestionIdsOfAQuiz(
userQuizIds.get(i), topic, difficulty);
if (questionIds.size() > 0) {
double quizGrade = Grade.findQuizGrade(questionIds, userId);
userQuizGrades.add(quizGrade);
}
}
double quizGrade = 0;
for (int i = 0; i < userQuizGrades.size() - 1; i++) {
quizGrade += userQuizGrades.get(i);
}
double averageQuizGrade = 0;
if (quizGrade != 0) {
averageQuizGrade = quizGrade / userQuizGrades.size();
}
return averageQuizGrade;
}
/**
* find the progress of a particular topic based on its difficulty level
*
* @param userId
* @param topic
* @param difficulty
* @return quizGradingProgress
* @throws Exception
*/
public static double findTopicDifficultyProgress(int userId, String topic, String difficulty)
throws Exception {
QuizAttempt quizAttempt = new QuizAttempt();
ArrayList<Integer> userQuizIds = quizAttempt.getUserQuizIds(userId);
ArrayList<Double> userQuizGrades = new ArrayList<Double>();
for (int i = 0; i < userQuizIds.size(); i++) {
QuizSlot quizSlot = new QuizSlot();
// get the question ids of questions belonging to a particular quiz
ArrayList<Integer> questionIds =
quizSlot.getDifficultyAndTopicWiseQuestionIdsOfAQuiz(
userQuizIds.get(i), topic, difficulty);
double quizGradingProgress = Progress.findQuizProgress(questionIds, userId);
userQuizGrades.add(quizGradingProgress);
}
double quizProgress = 0;
for (int i = 0; i < userQuizGrades.size() - 1; i++) {
if (userQuizGrades.get(i + 1) >= userQuizGrades.get(i)) {
quizProgress += 1;
}
}
double quizGradingProgress = 0;
if (quizProgress != 0 && userQuizGrades.size() > 1) {
quizGradingProgress = quizProgress / (userQuizGrades.size() - 1);
}
return quizGradingProgress;
}