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// @author Group 3
import java.util.InputMismatchException;
import java.util.Scanner;
import java.util.ArrayList;
import java.time.format.DateTimeFormatter;
import java.time.LocalDate;
import java.time.format.DateTimeParseException;
public class ClassroomBookingApp {
// Create new Scanner object
private static final Scanner INPUT = new Scanner(System.in);
// Define the ArrayLists as static fields (so can be accessed by all methods instead of main method)
private static ArrayList<Classroom> classrooms = new ArrayList<>();
private static ArrayList<Lecturer> lecturers = new ArrayList<>();
private static ArrayList<Booking> bookings = new ArrayList<>();
// Display Main Menu
private static void printMainMenu() {
System.out.println("*".repeat(50));
System.out.println("Welcome to Classroom Booking Application");
System.out.println("*** Main Menu ***");
System.out.println("1. Manage Classrooms");
System.out.println("2. Manage Lecturers");
System.out.println("3. Manage Bookings");
System.out.println("4. Generate Reports");
System.out.println("0. Exit");
System.out.println("*".repeat(50));
}
// Display Classrooms Menu
private static void printClassroomsMenu() {
System.out.println("*".repeat(50));
System.out.println("Welcome to Classroom Booking Application");
System.out.println("*** Classrooms Menu ***");
System.out.println("1. Create Classroom");
System.out.println("2. Update Classroom");
System.out.println("3. Delete Classroom");
System.out.println("4. View All Classrooms");
System.out.println("5. Back to Main Menu");
System.out.println("*".repeat(50));
}
private static void printLecturersMenu() {
System.out.println("*".repeat(50));
System.out.println("Welcome to Classroom Booking Application");
System.out.println("*** Lecturers Menu ***");
System.out.println("1. Add Lecturer");
System.out.println("2. Edit Lecturer");
System.out.println("3. Remove Lecturer");
System.out.println("4. View All Lecturers");
System.out.println("5. Back to Main Menu");
System.out.println("*".repeat(50));
}
private static void printBookingsMenu() {
System.out.println("*".repeat(50));
System.out.println("Welcome to Classroom Booking Application");
System.out.println("*** Bookings Menu ***");
System.out.println("1. Make a Booking");
System.out.println("2. Cancel a Booking");
System.out.println("3. View All Bookings");
System.out.println("4. Back to Main Menu");
System.out.println("*".repeat(50));
}
private static void printReportsMenu() {
System.out.println("*".repeat(50));
System.out.println("Welcome to Classroom Booking Application");
System.out.println("*** Reports Menu ***");
System.out.println("1. Generate Bookings Report by Date");
System.out.println("2. Generate Bookings Report by Classroom");
System.out.println("3. Generate Bookings Report by Lecturer");
System.out.println("4. Generate Total Number of Bookings");
System.out.println("5. Back to Main Menu");
System.out.println("*".repeat(50));
}
// Get User's Menu Option Input
private static int getOptionInput() {
boolean validInput = false;
int menuOption = -1;
// First Prompt to Obtain Input
System.out.print("Please select an option to continue: ");
while (!validInput) {
try {
// Obtain Input
menuOption = INPUT.nextInt();
// Check Input Range
switch (menuOption) {
case 0:
case 1:
case 2:
case 3:
case 4:
break;
default:
System.out.println("Hey! You entered an invalid option!");
System.out.print("Please reselect a VALID option: ");
continue;
}
validInput = true;
// If Input Isn't Integer
} catch (InputMismatchException e) {
System.out.println("Hey! You entered an invalid option!");
INPUT.next(); // Clear Invalid Input
System.out.print("Please reselect a VALID option: ");
}
}
return menuOption; // Return Valid Input
}
private static void manageClassroomsMenu() { //Appendix C
boolean backToMainMenu = false;
while (!backToMainMenu) {
printClassroomsMenu(); //prints classroom menu
int choice = getOptionInput();
switch (choice) {
case 1:
createClassroom();
break;
case 2:
updateClassroom();
break;
case 3:
deleteClassroom();
break;
case 4:
viewAllClassrooms();
break;
case 5:
backToMainMenu = true;
break;
default:
System.out.println("Invalid option, please try again!");
}
}
}
private static void createClassroom() { //create classroom method
System.out.print("Enter classroom number: ");
int classroomNum = INPUT.nextInt();
INPUT.nextLine(); // this is required as the integer is read and the newline character remains in the buffer. ( not required for the strings input)
System.out.print("Enter classroom name: ");
String classroomName = INPUT.nextLine();
System.out.print("Enter classroom location: ");
String classroomLocation = INPUT.nextLine();
Classroom newRoom = new Classroom(classroomNum, classroomName, classroomLocation);
classrooms.add(newRoom);
System.out.println("New Classroom created");
}
private static void updateClassroom() { //update classroom method
System.out.print("Enter classroom number to update: ");
int classroomNum = INPUT.nextInt();
INPUT.nextLine();
Classroom roomToUpdate = null;
for (Classroom existingClassroom : classrooms) {
if (existingClassroom.getClassroomNumber() == classroomNum) {
roomToUpdate = existingClassroom;
break;
}
}
if (roomToUpdate == null) {
System.out.println("Error: Invalid classroom number!");
return;
}
System.out.print("Update classroom name: "); // get user input for new details
String newClassroomName = INPUT.nextLine();
System.out.print("Update classroom location: ");
String newClassroomLocation = INPUT.nextLine();
roomToUpdate.setClassroomName(newClassroomName); //updates the ClassroomName var created in Classroom file
roomToUpdate.setClassroomLocation(newClassroomLocation);
System.out.println("Classroom '" + classroomNum + "' updated!");
}
private static void deleteClassroom() { //delete classroom method
System.out.print("Enter classroom number: ");
int classroomNum = INPUT.nextInt();
INPUT.nextLine();
Classroom roomToDelete = null;
for (Classroom existingClassroom : classrooms) {
if (existingClassroom.getClassroomNumber() == classroomNum) {
roomToDelete = existingClassroom;
break;
}
}
if (roomToDelete == null) {
System.out.println("Error: classroom number '" + classroomNum + "' does not exist!");
} else {
classrooms.remove(roomToDelete); //remove method
System.out.println("Classroom '" + classroomNum + "' deleted!");
}
}
private static void viewAllClassrooms() {
if (classrooms.isEmpty()) { //helps to check if list is empty
System.out.println("No classrooms created.");
} else {
System.out.println("** Classroom List **");
for (Classroom viewClassroom : classrooms) {
System.out.println("Classroom Number: " + viewClassroom.getClassroomNumber() + ", Name: " + viewClassroom.getClassroomName() + ", Location: " + viewClassroom.getClassroomLocation());
}
}
}
private static void manageLecturersMenu() { //Appendix D
boolean backToMainMenu = false;
while (!backToMainMenu) {
printLecturersMenu(); //prints lecturers menu
int choice = getOptionInput();
switch (choice) {
case 1:
addLecturer();
break;
case 2:
editLecturer();
break;
case 3:
removeLecturer();
break;
case 4:
viewAllLecturers();
break;
case 5:
backToMainMenu = true;
break;
default:
System.out.println("Invalid option, please try again!");
}
}
}
private static void addLecturer() { //create lecturer method
System.out.print("Enter lecturer ID: ");
int lecturerId = INPUT.nextInt();
INPUT.nextLine();
System.out.print("Enter lecturer full name: ");
String fullName = INPUT.nextLine();
System.out.print("Enter lecturer contact number: ");
String contactNumber = INPUT.nextLine();
System.out.print("Enter lecturer email: ");
String emailAddress = INPUT.nextLine();
Lecturer newLecturer = new Lecturer(lecturerId, fullName, contactNumber, emailAddress);
lecturers.add(newLecturer);
System.out.println("New lecturer added!");
}
private static void editLecturer() { //edit lecturer method
System.out.print("Enter lecturer ID to edit: ");
int lecturerId = INPUT.nextInt();
INPUT.nextLine();
Lecturer lecturerToEdit = null;
for (Lecturer existingLecturer : lecturers) {
if (existingLecturer.getLecturerId() == lecturerId) {
lecturerToEdit = existingLecturer;
break;
}
}
if (lecturerToEdit == null) {
System.out.println("Invalid lecturer ID!");
return;
}
System.out.print("Edit lecturer full name: ");
String newFullName = INPUT.nextLine();
System.out.print("Edit lecturer contact number: ");
String newContactNumber = INPUT.nextLine();
System.out.print("Edit lecturer email: ");
String newEmailAddress = INPUT.nextLine();
lecturerToEdit.setFullName(newFullName); //update lecturer details
lecturerToEdit.setContactNumber(newContactNumber);
lecturerToEdit.setEmailAddress(newEmailAddress);
System.out.println("Lecturer '" + lecturerId + "' edited!");
}
private static void removeLecturer() { //remove lecturer method
System.out.print("Enter lecturer ID to remove: ");
int lecturerId = INPUT.nextInt();
INPUT.nextLine();
Lecturer lecturerToRemove = null; //finding lecturer in the list
for (Lecturer existingLecturer : lecturers) {
if (existingLecturer.getLecturerId() == lecturerId) {
lecturerToRemove = existingLecturer;
break;
}
}
if (lecturerToRemove != null) {
lecturers.remove(lecturerToRemove); //remove lecturer
System.out.println("Lecturer '" + lecturerId + "' removed!");
} else {
System.out.println("Error: Lecturer ID '" + lecturerId + "' does not exist!");
}
}
private static void viewAllLecturers() { //view lecturer method
if (lecturers.isEmpty()) {
System.out.println("No lecturers added!");
} else {
System.out.println("** Lecturer List **");
for (Lecturer viewLecturer : lecturers) {
System.out.println("Lecturer ID: " + viewLecturer.getLecturerId() + ", Name: " + viewLecturer.getFullName() + ", Contact: " + viewLecturer.getContactNumber() + ", Email: " + viewLecturer.getEmailAddress());
}
}
}
private static void manageBookingsMenu() { //Appendix E
boolean backToMainMenu = false;
while (!backToMainMenu) {
printBookingsMenu(); //prints booking menu
int choice = getOptionInput();
switch (choice) {
case 1:
makeBooking();
break;
case 2:
cancelBooking();
break;
case 3:
viewAllBookings();
break;
case 4:
backToMainMenu = true;
break;
default:
System.out.println("Invalid option, please try again!");
}
}
}
private static void makeBooking() { //make a booking method
System.out.print("Enter booking date (dd/mm/yyyy): ");
String inputDate = INPUT.nextLine();
LocalDate bookingDate = LocalDate.parse(inputDate, DateTimeFormatter.ofPattern("dd/MM/yyyy")); //converts inputDate from string format to LocalDate
System.out.print("Enter lecturer id: ");
int lecturerId = INPUT.nextInt();
INPUT.nextLine();
Lecturer selectedLecturer = null; // Finds if lecturer exists
for (Lecturer existingLecturer : lecturers) {
if (existingLecturer.getLecturerId() == lecturerId) {
selectedLecturer = existingLecturer;
break;
}
}
if (selectedLecturer == null) {
System.out.println("Error: Lecturer ID '" + lecturerId + "' not found!");
return;
}
Classroom availableClassroom = null; //method to check if have available classes
for (Classroom reservedClass : classrooms) {
boolean isBooked = false;
for (Booking reservedBooking : bookings) {
if (reservedBooking.getClassroom().equals(reservedClass) && reservedBooking.getBookingDate().equals(bookingDate)) {
isBooked = true;
break;
}
}
if (!isBooked) {
availableClassroom = reservedClass;
break;
}
}
if (availableClassroom == null) {
System.out.println("No available classroom on " + bookingDate);
return;
}
int bookingId = generateBookingId();
Booking newBooking = new Booking(bookingId, bookingDate, availableClassroom, selectedLecturer);
bookings.add(newBooking);
System.out.println("Classroom '" + availableClassroom.getClassroomName() + "' booked, booking ID is " + bookingId);
}
private static int nextBookingId = 50001; // Static variable to keep track of the next booking ID ( following appendix number, else should start from 1)
private static int generateBookingId() {
return nextBookingId++; // Return the current ID and increment the counter
}
private static void cancelBooking() { //cancel booking method
System.out.print("Enter booking ID: ");
int bookingId = INPUT.nextInt();
INPUT.nextLine();
boolean found = false;
//Iterator<Booking> iterator = bookings.iterator();
for (Booking booked : bookings) { //finds the booking then cancels it
if (booked.getBookingId() == bookingId) {
bookings.remove(booked); // or can use iterator.remove(); // Remove the booking using the iterator safer option
System.out.println("Booking '" + bookingId + "' cancelled!");
found = true;
break;
}
}
if (!found) {
System.out.println("Booking ID '" + bookingId + "' not found.");
}
}
private static void viewAllBookings() { // view bookings method
if (bookings.isEmpty()) {
System.out.println("No bookings found.");
} else {
System.out.println("All Bookings:");
for (Booking booked : bookings) {
System.out.println("Booking ID: " + booked.getBookingId() + ", Date: " + booked.getBookingDate() + ", Classroom Number: " + booked.getClassroom().getClassroomNumber() + ", Lecturer ID: " + booked.getLecturer().getLecturerId());
}
}
}
private static void manageReportsMenu() { //Appendix F
boolean backToMainMenu = false;
while (!backToMainMenu) {
printReportsMenu(); //prints reports menu
int choice = getOptionInput();
switch (choice) {
case 1:
generateBookingsByDate();
break;
case 2:
generateBookingsByClassroom();
break;
case 3:
generateBookingsByLecturer();
break;
case 4:
generateTotalBookings();
break;
case 5:
backToMainMenu = true;
break;
default:
System.out.println("Invalid option, please try again!");
}
}
}
private static void generateBookingsByDate() { //generate bookings by date method
System.out.print("Enter date (dd/MM/yyyy): ");
String inputDate = INPUT.nextLine();
LocalDate reportDate;
try {
reportDate = LocalDate.parse(inputDate, DateTimeFormatter.ofPattern("dd/MM/yyyy"));
} catch (DateTimeParseException e) { //imported from java, use exception handling try-catch
System.out.println("Invalid date format! Make sure to enter the date in dd/MM/yyyy format.");
return;
}
boolean found = false;
for (Booking bookedByDate : bookings) {
if (bookedByDate.getBookingDate().equals(reportDate)) {
System.out.println("Booking ID: " + bookedByDate.getBookingId() + ", Classroom number: " + bookedByDate.getClassroom().getClassroomNumber() + ", Lecturer ID: " + bookedByDate.getLecturer().getLecturerId());
found = true;
}
}
if (!found) {
System.out.println("No bookings found for " + reportDate);
}
}
private static void generateBookingsByClassroom() { //generate bookings by classroom method
System.out.print("Enter classroom number: ");
int classroomNumber = INPUT.nextInt();
INPUT.nextLine();
boolean found = false;
for (Booking bookedByClassroom : bookings) {
if (bookedByClassroom.getClassroom().getClassroomNumber() == classroomNumber) {
System.out.println("Booking ID: " + bookedByClassroom.getBookingId() + ", Date: " + bookedByClassroom.getBookingDate().format(DateTimeFormatter.ofPattern("dd/MM/yyyy")) + ", Lecturer ID: " + bookedByClassroom.getLecturer().getLecturerId());
found = true;
}
}
if (!found) {
System.out.println("No bookings found for classroom number " + classroomNumber);
}
}
private static void generateBookingsByLecturer() { //generate bookings by lecturer method
System.out.print("Enter lecturer id: ");
int lecturerId = INPUT.nextInt();
INPUT.nextLine();
boolean found = false;
for (Booking bookedByLecturer : bookings) {
if (bookedByLecturer.getLecturer().getLecturerId() == lecturerId) {
System.out.println("Booking ID: " + bookedByLecturer.getBookingId() + ", Date: " + bookedByLecturer.getBookingDate().format(DateTimeFormatter.ofPattern("dd/MM/yyyy")) + ", Classroom number: " + bookedByLecturer.getClassroom().getClassroomNumber());
found = true;
}
}
if (!found) {
System.out.println("No bookings found for lecturer ID: " + lecturerId);
}
}
private static void generateTotalBookings() { // find total number of booking method
System.out.println("Total number of bookings: " + bookings.size());
}
// Main Method
public static void main(String[] args) {
// Display Main Menu
printMainMenu();
// Obtain Main Menu Option from User
int menuOption = getOptionInput();
switch (menuOption) {
case 1: // Manage Classrooms
manageClassroomsMenu();
break;
case 2: // Manage Lecturers
manageLecturersMenu();
break;
case 3: // Manage Bookings
manageBookingsMenu();
break;
case 4: // Generate Reports
manageReportsMenu();
break;
case 0: // Exit
System.out.println("Thank you for using the Classroom Booking Application!");
System.exit(0);
}
}
}
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