// Calculate How many time
public List<TestingCenterTimeSlots> generateTimeSlots(Exam exam) {
TestingCenterInfo tci = tcr.findByTerm(tcr.getCurrentTerm().getTermId());
int gap = tci.getGap();
int examDuration = exam.getDuration();
int openMinutes = (int) ChronoUnit.MINUTES.between(tci.getOpen(), tci.getClose());
// Ensure time chunk devides 30
int timeChuck =
(examDuration + gap) % 30 == 0 ? examDuration : 30 * ((examDuration + gap) / 30 + 1);
LocalTime endTime = exam.getEndDateTime().toLocalTime();
LocalTime beginTime = exam.getStartDateTime().toLocalTime();
LocalTime openTime = tci.getOpen();
LocalTime closeTime = tci.getClose();
LocalDate beginDate = exam.getStartDateTime().toLocalDate();
LocalDate endDate = exam.getEndDateTime().toLocalDate();
beginTime = adjustTime(beginTime); // Exam Begin Time
endTime = adjustTime(endTime); // Exam End Time
// Calculate Duration According to different day.
int startDayDuration = (int) ChronoUnit.MINUTES.between(beginTime, closeTime);
int dayLast = (int) ChronoUnit.DAYS.between(beginDate, endDate) - 1;
int endDayDuration = (int) ChronoUnit.MINUTES.between(openTime, endTime);
int startDayChucks = startDayDuration / timeChuck;
int endDayChucks = endDayDuration / timeChuck;
int regularDayChuncks = dayLast >= 0 ? (dayLast * openMinutes) / timeChuck : 0;
int dailyChuncks = openMinutes / timeChuck;
LocalDate dateCursor = beginDate;
LocalTime timeCursor = beginTime;
List<TestingCenterTimeSlots> timeSlotses = new ArrayList<>();
if (startDayChucks > 0) {
for (int i = 0; i < startDayChucks; i++) {
LocalDateTime slotsBegin = dateCursor.atTime(timeCursor);
LocalDateTime slotsEnd = dateCursor.atTime(timeCursor.plusMinutes(examDuration));
TestingCenterTimeSlots t =
new TestingCenterTimeSlots(
exam.getExamId(),
slotsBegin,
slotsEnd,
tci.getNumSeats(),
tci.getNumSetAsideSeats());
timeSlotses.add(t);
timeCursor = timeCursor.plusMinutes(timeChuck);
}
}
if (regularDayChuncks > 0) {
for (int i = 0; i < dayLast; i++) {
dateCursor = dateCursor.plusDays(1);
timeCursor = adjustTime(openTime);
for (int j = 0; j < dailyChuncks; j++) {
LocalDateTime slotsBegin = dateCursor.atTime(timeCursor);
LocalDateTime slotsEnd = dateCursor.atTime(timeCursor.plusMinutes(examDuration));
TestingCenterTimeSlots t =
new TestingCenterTimeSlots(
exam.getExamId(),
slotsBegin,
slotsEnd,
tci.getNumSeats(),
tci.getNumSetAsideSeats());
timeSlotses.add(t);
timeCursor = timeCursor.plusMinutes(timeChuck);
}
}
}
if (endDayChucks > 0) {
dateCursor = dateCursor.plusDays(1);
timeCursor = adjustTime(openTime);
for (int i = 0; i < endDayChucks; i++) {
LocalDateTime slotsBegin = dateCursor.atTime(timeCursor);
LocalDateTime slotsEnd = dateCursor.atTime(timeCursor.plusMinutes(examDuration));
TestingCenterTimeSlots t =
new TestingCenterTimeSlots(
exam.getExamId(),
slotsBegin,
slotsEnd,
tci.getNumSeats(),
tci.getNumSetAsideSeats());
timeSlotses.add(t);
timeCursor = timeCursor.plusMinutes(timeChuck);
}
}
return timeSlotses;
}