feat: update global exception handler

Author: UmaxCode

src/main/java/org/umaxcode/exception/ErrorMessage.java

@@ -10,6 +10,6 @@
 public class ErrorMessage {
 
     private String path;
-    private String message;
+    private Object message;
     private String timestamp;
 }

src/main/java/org/umaxcode/exception/GlobalExceptionHandler.java

@@ -2,11 +2,17 @@
 
 import jakarta.servlet.http.HttpServletRequest;
 import org.springframework.http.HttpStatus;
+import org.springframework.security.access.AccessDeniedException;
+import org.springframework.security.core.AuthenticationException;
+import org.springframework.validation.FieldError;
+import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.ResponseStatus;
 import org.springframework.web.bind.annotation.RestControllerAdvice;
 
 import java.time.LocalDateTime;
+import java.util.HashMap;
+import java.util.Map;
 
 @RestControllerAdvice
 public class GlobalExceptionHandler {
@@ -22,6 +28,44 @@ public ErrorMessage taskManagementExceptionHandler(TaskManagementException ex, H
                 .build();
     }
 
+    @ExceptionHandler(AuthenticationException.class)
+    @ResponseStatus(HttpStatus.UNAUTHORIZED)
+    public ErrorMessage authenticationExceptionHandler(AuthenticationException ex, HttpServletRequest request) {
+
+        return ErrorMessage.builder()
+                .path(request.getRequestURI())
+                .message(ex.getMessage())
+                .timestamp(LocalDateTime.now().toString())
+                .build();
+    }
+
+    @ExceptionHandler(AccessDeniedException.class)
+    @ResponseStatus(HttpStatus.FORBIDDEN)
+    public ErrorMessage accessDeniedHandler(AccessDeniedException ex, HttpServletRequest request) {
+
+        return ErrorMessage.builder()
+                .path(request.getRequestURI())
+                .message("You do not have permission to access this resource.")
+                .timestamp(LocalDateTime.now().toString())
+                .build();
+    }
+
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ErrorMessage handleArgumentNotValidException(MethodArgumentNotValidException ex, HttpServletRequest request) {
+
+        Map<String, String> errors = new HashMap<>();
+
+        for (FieldError error : ex.getBindingResult().getFieldErrors()) {
+            errors.put(error.getField(), error.getDefaultMessage());
+        }
+
+        return ErrorMessage.builder()
+                .path(request.getRequestURI())
+                .message(errors)
+                .timestamp(LocalDateTime.now().toString())
+                .build();
+    }
+
     @ExceptionHandler(Exception.class)
     @ResponseStatus(HttpStatus.NOT_FOUND)
     public ErrorMessage exceptionHandler(Exception ex, HttpServletRequest request) {