[BE] Feature/425 self following

backend/src/main/java/com/group1/programminglanguagesforum/DTOs/Responses/UserProfileResponseDto.java

@@ -16,5 +16,6 @@ public class UserProfileResponseDto {
     private Long answerCount;
     private int followersCount;
     private int followingCount;
+    private boolean selfFollowing;
     private int reputationPoints;
 }

backend/src/main/java/com/group1/programminglanguagesforum/Entities/User.java

@@ -48,6 +48,7 @@ public class User implements UserDetails {
     private Set<User> followers = new HashSet<>();
     @ManyToMany(mappedBy = "followers", fetch = FetchType.EAGER)
     private Set<User> following = new HashSet<>();
+    private boolean selfFollowing = false;
 
     @Builder.Default
     private int followersCount = 0;

backend/src/main/java/com/group1/programminglanguagesforum/Services/UserService.java

@@ -34,7 +34,8 @@ public User followUser(User user, Long id) throws UserNotFoundException {
             throw new UserNotFoundException("User not found");
         }
         if(user.getId().equals(id)) {
-            throw new UserNotFoundException("You can't follow yourself");
+            user.setSelfFollowing(true);
+            return userRepository.save(user);
         }
         User userToFollow = userToFollowOptional.get();
         user.getFollowing().add(userToFollow);
@@ -50,6 +51,10 @@ public User unfollowUser(User user, Long id) throws UserNotFoundException {
         if (userToUnfollowOptional.isEmpty()) {
             throw new UserNotFoundException("User not found");
         }
+        if (user.getId().equals(id)) {
+            user.setSelfFollowing(false);
+            return userRepository.save(user);
+        }
         User userToUnfollow = userToUnfollowOptional.get();
         user.getFollowing().remove(userToUnfollow);
         user.setFollowingCount(user.getFollowingCount() - 1);