chore: fix coding style

src/main/java/tw/commonground/backend/service/viewpoint/ViewpointReactionRepository.java

@@ -12,9 +12,8 @@
 public interface ViewpointReactionRepository extends JpaRepository<ViewpointReactionEntity, ViewpointReactionId> {
     Optional<ViewpointReactionEntity> findById(ViewpointReactionId id);
 
-    // @Modifying
-    //@Query("UPDATE ViewpointEntity v SET v.likeCount = v.likeCount - 1 WHERE v.id = :viewpointId AND v.likeCount > 0")
-    //void decrementLikeCount(@Param("viewpointId") Long viewpointId);
+    @Query("SELECT v.reaction FROM ViewpointReactionEntity v WHERE v.id = :id")
+    Optional<Reaction> findReactionById(ViewpointReactionId id);
 
     // need to query who liked the viewpoint
 

src/main/java/tw/commonground/backend/service/viewpoint/ViewpointService.java

@@ -58,30 +58,22 @@ public void deleteViewpoint(UUID id) {
     @Transactional
     public ViewpointReactionEntity reactToViewpoint(String email, UUID viewpointId, String reaction) {
 
-        // check if the user and viewpoint exist in the database
         Long userId = userRepository.findIdByEmail(email).orElseThrow(
                 () -> new EntityNotFoundException("User", "email", email)).getId();;
 
         ViewpointReactionId viewpointReactionId = new ViewpointReactionId(userId, viewpointId);
 
+        // check if the user and viewpoint exist in the database
         UserEntity userEntity = userRepository.findById(userId).orElseThrow(
                 () -> new EntityNotFoundException("User", "id", valueOf(userId)));
         ViewpointEntity viewpointEntity = viewpointRepository.findViewpointEntityById(viewpointId).orElseThrow(
                 () -> new EntityNotFoundException("Viewpoint", "id", viewpointId.toString()));
 
         // check if the viewpointReactionEntity exists in the database, if not means the user has not reacted to the viewpoint
-        ViewpointReactionEntity viewpointReactionEntity = viewpointReactionRepository.findById(viewpointReactionId).orElseGet(() -> {
-            ViewpointReactionEntity newViewpointReactionEntity = new ViewpointReactionEntity();
-            // create a new ViewpointReactionEntity with the given userId and viewpointId
-            newViewpointReactionEntity.setId(viewpointReactionId);
-            newViewpointReactionEntity.setReaction(Reaction.NONE);
-            return newViewpointReactionEntity;
+        Reaction previousReaction = viewpointReactionRepository.findReactionById(viewpointReactionId).orElseGet(() -> {
+            return Reaction.NONE;
         });
 
-        // test
-//        return viewpointReactionEntity;
-
-        Reaction previousReaction = viewpointReactionEntity.getReaction();
         switch (previousReaction) {
             case NONE:
                 break;
@@ -98,7 +90,11 @@ public ViewpointReactionEntity reactToViewpoint(String email, UUID viewpointId,
                 throw new IllegalArgumentException("Invalid reaction: " + previousReaction);
         }
 
+        ViewpointReactionEntity viewpointReactionEntity = new ViewpointReactionEntity();
+        // create a new ViewpointReactionEntity with the given userId and viewpointId
+        viewpointReactionEntity.setId(viewpointReactionId);
         viewpointReactionEntity.setReaction(Reaction.valueOf(reaction));
+
         switch (Reaction.valueOf(reaction)) {
             case NONE: // delete the viewpointReactionEntity if the reaction is NONE
                 viewpointReactionRepository.delete(viewpointReactionEntity);

src/main/java/tw/commonground/backend/service/viewpoint/dto/ViewpointResponse.java

@@ -23,7 +23,6 @@ public class ViewpointResponse {
     private UUID authorId;
     private String authorName;
     private URI authorAvatar;
-    private ViewpointReactionEntity userReaction;
     private Integer likeCount;
     private Integer reasonableCount;
     private Integer dislikeCount;