Fixed bug where user is unable to exit from secondary input to primar…

…y input in set-genre function and enhanced the code by including indentations for the respective level of input

src/main/java/seedu/bookbuddy/Ui.java

@@ -175,4 +175,10 @@ public static void printAuthorFound(ArrayList<BookMain> bookAuthor) {
             System.out.println(i + 1 + ". " + bookAuthor.get(i));
         }
     }
+    public static void printSingleIndentation() {
+        System.out.print("----");
+    }
+    public static void printDoubleIndentation() {
+        System.out.print("--------");
+    }
 }

src/main/java/seedu/bookbuddy/parser/parsercommands/parsegenre/InputLooper.java

@@ -12,7 +12,7 @@ public class InputLooper {
     public String inputLooper(String input, Scanner scanner, BookList books) throws IOException {
         while (input == null) {
             try {
-                input = handleInput(scanner);
+                input = handleInitialInput(scanner);
                 if (input == null) {
                     return null;  // Break out of the loop if input is null (exit command was used)
                 }
@@ -27,23 +27,53 @@ public String inputLooper(String input, Scanner scanner, BookList books) throws
         return input;
     }
 
-    private String handleInput(Scanner scanner) throws InvalidInputException, IOException {
+    private boolean handleExitCommands(String input, Integer indentationValue) throws IOException {
+        if (isExitCommand(input)) {
+            for (int i = 0; i < indentationValue; i++) {
+                Ui.printSingleIndentation();
+            }
+            Ui.exitCommandMessage();
+            for (int i = 0; i < indentationValue - 1; i++) {
+                Ui.printSingleIndentation();
+            }
+            if (indentationValue == 2) {
+                System.out.print("Enter the number for the desired genre, or add a new one:\n");
+                Ui.printSingleIndentation();
+            }
+            return true;
+        } else if (isByeCommand(input)) {
+            BookBuddy.performExit();
+            return true;
+        }
+        return false;
+    }
+
+    private String handleInitialInput(Scanner scanner) throws InvalidInputException, IOException {
         while (true) {
             String newInput = scanner.nextLine().trim();
+            Integer indentationValue = 1;
+            if (handleExitCommands(newInput, indentationValue)) {
+                return null;
+            }
+
             String[] parts = newInput.split("\\s+");
             if (parts.length == 1 && isValidNumber(parts[0])) {
                 return newInput;
             }
-            if (isExitCommand(newInput)) {
-                Ui.exitCommandMessage();
-                return null;
-            }
-            if (isByeCommand(newInput)) {
-                BookBuddy.performExit();
+
+            throw new InvalidInputException(newInput + " is an invalid input. Please enter a valid number or type 'exit' to cancel or 'bye' to exit the programme.");
+        }
+    }
+
+    private String handleSecondaryInput(Scanner scanner) throws IOException {
+        while (true) {
+            String newInput = scanner.nextLine().trim();
+            Integer indentationValue = 2;
+            if (handleExitCommands(newInput, indentationValue)) {
                 return null;
+            } else {
+                return newInput;
             }
-            throw new InvalidInputException(newInput + " is an invalid input. Please enter a valid " +
-                    "number or type 'exit' to cancel or 'bye' to exit the programme.");
         }
     }
 
@@ -59,11 +89,13 @@ private static boolean isByeCommand(String input) {
         return "bye".equalsIgnoreCase(input);
     }
 
-    private String processSelection(String newInput, Scanner scanner, BookList books) throws InvalidInputException {
+    private String processSelection(String newInput, Scanner scanner, BookList books) throws InvalidInputException, IOException {
         int selection = Integer.parseInt(newInput);
         if (selection == books.getAvailableGenres().size() + 1) {
-            System.out.println("Enter the new genre:");
-            String genre = scanner.nextLine().trim();
+            Ui.printDoubleIndentation();
+            System.out.print("Enter the new genre:\n");
+            Ui.printDoubleIndentation();
+            String genre = handleSecondaryInput(scanner);
             return NewGenreModifier.duplicateChecker(genre, books);
         }
         if (selection > 0 && selection <= books.getAvailableGenres().size()) {

src/main/java/seedu/bookbuddy/parser/parsercommands/parsegenre/NewGenreModifier.java

@@ -13,6 +13,9 @@ static void genreSelectionPrinter(BookList books) {
     }
 
     static String duplicateChecker(String input, BookList books) {
+        if (input == null) {
+            return null;
+        }
         boolean genreExists = false;
         for (String existingGenre : books.getAvailableGenres()) {
             if (existingGenre.equalsIgnoreCase(input)) {

src/main/java/seedu/bookbuddy/parser/parsercommands/parsegenre/ParserGenre.java

@@ -1,6 +1,7 @@
 package seedu.bookbuddy.parser.parsercommands.parsegenre;
 
 import exceptions.InvalidCommandArgumentException;
+import seedu.bookbuddy.Ui;
 import seedu.bookbuddy.bookdetailsmodifier.BookGenre;
 import seedu.bookbuddy.booklist.BookList;
 import seedu.bookbuddy.parser.parservalidation.Exceptions;
@@ -38,7 +39,9 @@ static void parseSetGenre(BookList books, String[] inputArray) throws IOExceptio
 
     private static void multiStepSetGenre(BookList books, int index) throws IOException {
         NewGenreModifier.genreSelectionPrinter(books);
-        System.out.println("Enter the number for the desired genre, or add a new one:");
+        Ui.printSingleIndentation();
+        System.out.print("Enter the number for the desired genre, or add a new one:\n");
+        Ui.printSingleIndentation();
         Scanner scanner = new Scanner(System.in);
         InputLooper looper = new InputLooper();
         String selectedGenre = looper.inputLooper(null, scanner, books);