refactoring: fixed indentations and removed useless comments in LoginGUI

src/main/java/CreateUser.java

@@ -105,7 +105,7 @@ class CreateUser {
         }    return new CreateUser(id, userName, password, birthday, firstName, surname);
     }
     
- // Function to hash the password using SHA-256 algorithm
+    // Function to hash the password using SHA-256 algorithm
     private String hashPassword(String password) {
     	try {
             MessageDigest digest = MessageDigest.getInstance("SHA-256");
@@ -123,7 +123,7 @@ class CreateUser {
         }
     }
     
- // Function to save to JSON file, replace with database call later
+    // Function to save to JSON file, replace with database call later
     public void saveToJsonFile(String filename) {
     	List<CreateUser> userList = readUserListFromJsonFile(filename);
         userList.add(this);
@@ -133,11 +133,11 @@ class CreateUser {
             gson.toJson(userList, fileWriter);
             System.out.println("User information appended to " + filename);
         } catch (IOException e) {
-        System.out.println("Error occurred while saving user information to JSON file: " + e.getMessage());
+        	System.out.println("Error occurred while saving user information to JSON file: " + e.getMessage());
         }
     }
     
- // Function to read user information from a JSON file
+    // Function to read user information from a JSON file
     public static List<CreateUser> readUserListFromJsonFile(String filename) {
         List<CreateUser> userList = new ArrayList<>();
         try (Reader reader = new FileReader(filename)) {
@@ -152,7 +152,7 @@ class CreateUser {
         return userList;
     }
     
- // Function to update stayLoggedIn variable in the JSON file
+    // Function to update stayLoggedIn variable in the JSON file
     public static void updateStayLoggedIn(String filename, String username, boolean stayLoggedIn) {
         List<CreateUser> userList = readUserListFromJsonFile(filename);
 

src/main/java/LoginGUI.java

@@ -35,7 +35,6 @@ public class LoginGUI extends JFrame implements ActionListener {
         return signUpButton;
     }
 
-    
     public LoginGUI() {
         setTitle("Login");
         setSize(300, 220);
@@ -81,9 +80,9 @@ public class LoginGUI extends JFrame implements ActionListener {
             public void actionPerformed(ActionEvent e) {
                 boolean stayLoggedIn = stayLoggedInCheckbox.isSelected();
                 String username = usernameField.getText();
-             // Set stayLoggedIn to false if the checkbox is unchecked
+                // Set stayLoggedIn to false if the checkbox is unchecked
                 if (!stayLoggedInCheckbox.isSelected()) {
-                stayLoggedIn = false;
+                	stayLoggedIn = false;
                 }
                 updateStayLoggedIn(username, stayLoggedIn);
             }
@@ -94,63 +93,57 @@ public class LoginGUI extends JFrame implements ActionListener {
     @Override
     public void actionPerformed(ActionEvent e) {
         if (e.getSource() == loginButton) {
-            login();
+        	login();
         }else if (e.getSource() == signUpButton) {
             SignUpGUI signUpGUI = new SignUpGUI();
             signUpGUI.setVisible(true);
-            
         }
     }
 
     private void login() {
         String username = usernameField.getText();
         String password = new String(passwordField.getPassword());
-        boolean stayLoggedIn = stayLoggedInCheckbox.isSelected(); // Get checkbox state
 
         if (authenticateUser(username, password)) {
-            JOptionPane.showMessageDialog(this, "Login successful!");
-            // Perform actions after successful login
-            
+            JOptionPane.showMessageDialog(this, "Login successful!");            
             dispose();
         } else {
             JOptionPane.showMessageDialog(this, "Invalid username or password", "Login Error", JOptionPane.ERROR_MESSAGE);
         }
     }
     
-    private void updateStayLoggedIn(String username, boolean stayLoggedIn) {
     // Update stayLoggedIn in the JSON file for the user
-    CreateUser.updateStayLoggedIn("user.json", username, stayLoggedIn);
+    private void updateStayLoggedIn(String username, boolean stayLoggedIn) {
+    	CreateUser.updateStayLoggedIn("user.json", username, stayLoggedIn);
     }
     
- // Function to authenticate the user by comparing the entered username and password with the saved user data
+    // Function to authenticate the user by comparing the entered username and password with the saved user data
     private boolean authenticateUser(String username, String password) {
         List<CreateUser> userList = CreateUser.readUserListFromJsonFile("user.json");
         if (userList != null) {
         	for (CreateUser user : userList) {
                 if (user.getUserName().equals(username)) {
-                // Hash the user input password
-                String hashedPassword = hashPassword(password);
-                // Compare the hashed passwords
-                if (user.getPassword().equals(hashedPassword)) {
-             return true; // Success
-           }
-            }
-        }
+                	String hashedPassword = hashPassword(password);
+                	if (user.getPassword().equals(hashedPassword)) {
+                		return true; 
+                	}
+                }
+        	}
         }
-        return false; // Fail
+        return false; 
     }
 
-        private String hashPassword(String password) {
-            try {
-                MessageDigest digest = MessageDigest.getInstance("SHA-256");
-                byte[] hash = digest.digest(password.getBytes());
-                StringBuilder hexString = new StringBuilder();
-                for (byte b : hash) {
-                String hex = Integer.toHexString(0xff & b);
-                if (hex.length() == 1) {
-                hexString.append('0');
-                }
-                hexString.append(hex);
+    private String hashPassword(String password) {
+    	try {
+    		MessageDigest digest = MessageDigest.getInstance("SHA-256");
+    		byte[] hash = digest.digest(password.getBytes());
+    		StringBuilder hexString = new StringBuilder();
+    		for (byte b : hash) {
+    			String hex = Integer.toHexString(0xff & b);
+    			if (hex.length() == 1) {
+    				hexString.append('0');
+    			}
+    			hexString.append(hex);
                 }
                 return hexString.toString();
             } catch (NoSuchAlgorithmException e) {