Bug fixes -

1. Set-genre does not take into trailling and leading spaces
2. Set-genre does not detect existing genres in the genre list

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

@@ -12,7 +12,7 @@ static void parseSetGenre(BookList books, String[] inputArray) {
         Exceptions.validateCommandArguments(inputArray, 2, "The set-genre command requires " +
                 "at least a book index.");
 
-        String[] parts = inputArray[1].split(" ", 2); // Attempt to split inputArray[1] into two parts
+        String[] parts = inputArray[1].trim().split(" ", 2); //Attempt to split inputArray[1] into two parts
         int index;
         try {
             index = Integer.parseInt(parts[0]); // The first part should be the index
@@ -49,25 +49,11 @@ private static void multiStepSetGenre(BookList books, int index) {
     }
 
     private static void singleStepSetGenre(BookList books, String[] parts, int index) {
-        String genreInput = parts[1];
-        boolean genreExists = false;
-        for (String existingGenre : BookList.getAvailableGenres()) {
-            if (existingGenre.equalsIgnoreCase(genreInput)) {
-                genreExists = true;
-                genreInput = existingGenre; // Normalize to the existing genre's case
-                break;
-            }
-        }
-
-        if (!genreExists) {
-            BookList.getAvailableGenres().add(genreInput);
-            System.out.println("Added new genre to the list: " + genreInput);
-        }
+        String genreInput = parts[1].trim();
+        genreInput = duplicateChecker(genreInput);
         BookGenre.setBookGenreByIndex(index, genreInput, books);
-        System.out.println("Genre set to " + genreInput + " for book at index " + index);
     }
 
-
     static void genreSelectionPrinter() {
         System.out.println("Available genres:");
         for (int i = 0; i < BookList.getAvailableGenres().size(); i++) {
@@ -79,7 +65,7 @@ static void genreSelectionPrinter() {
     public static String invalidInputLooper(String input, Scanner scanner) {
         while (input == null) {
             while (!scanner.hasNextInt()) {  // Ensure the next input is an integer
-                String newInput = scanner.nextLine();
+                String newInput = scanner.nextLine().trim();
                 if ("exit".equalsIgnoreCase(newInput)) {
                     Ui.exitCommandMessage();
                     return null;
@@ -94,8 +80,8 @@ public static String invalidInputLooper(String input, Scanner scanner) {
 
             if (genreSelection == BookList.getAvailableGenres().size() + 1) {
                 System.out.println("Enter the new genre:");
-                input = scanner.nextLine();
-                BookList.getAvailableGenres().add(input); // Add the new genre to the list
+                input = scanner.nextLine().trim();
+                input = duplicateChecker(input);
             } else if (genreSelection > 0 && genreSelection <= BookList.getAvailableGenres().size()) {
                 input = BookList.getAvailableGenres().get(genreSelection - 1);
             } else {
@@ -107,6 +93,26 @@ public static String invalidInputLooper(String input, Scanner scanner) {
         return input;
     }
 
+    private static String duplicateChecker(String input) {
+        boolean genreExists = false;
+        for (String existingGenre : BookList.getAvailableGenres()) {
+            if (existingGenre.equalsIgnoreCase(input)) {
+                genreExists = true;
+                input = existingGenre; // Normalize to the existing genre's case
+                break;
+            }
+        }
+        if (!genreExists) {
+            BookList.getAvailableGenres().add(input);
+            Ui.printLine();
+            System.out.println("Added new genre to the list: " + input);
+        } else {
+            Ui.printLine();
+            System.out.println("[" + input + "] exists in the existing genre list!");
+        }
+        return input;
+    }
+
     public static void executeParseSetGenre (BookList books, String[] inputArray) {
         parseSetGenre(books, inputArray);
     }