[Refactor] commentSystem을 commentEvent로 변경

src/main/java/Mua/Mua_backend/domain/comment/entity/Comment.java

@@ -92,17 +92,18 @@ public static Comment createUserComment(
                 .build();
     }
 
-    // SYSTEM 댓글 생성
-    public static Comment createSystemComment(
+    // SYSTEMEVENT 댓글 생성
+    public static Comment createEventComment(
             String description,
             Feed feed,
-            Long participationId
+            Long participationId,
+            CommentType type
     ) {
         return Comment.builder()
                 .description(description)
                 .parentId(null)
                 .depth(0)
-                .commentType(CommentType.SYSTEM)
+                .commentType(type)
                 .member(null)
                 .feed(feed)
                 .participationId(participationId)

src/main/java/Mua/Mua_backend/domain/comment/entity/CommentType.java

@@ -2,5 +2,8 @@
 
 public enum CommentType {
     USER,
-    SYSTEM
+    APPLY,
+    APPROVE,
+    REJECT,
+    CANCEL
 }

src/main/java/Mua/Mua_backend/domain/comment/service/CommentService.java

@@ -84,11 +84,23 @@ public List<CommentResponse> getComments(Long feedId) {
     }
 
     // 시스템 댓글 생성
-    public void createSystemComment(Long feedId, String message, Long participationId) {
+    public void createEventComment(
+            Long feedId,
+            Long participationId,
+            String message,
+            CommentType type
+    ) {
+
         Feed feed = feedRepository.findById(feedId)
                 .orElseThrow(() -> new IllegalArgumentException("피드가 존재하지 않습니다."));
 
-        Comment comment = Comment.createSystemComment(message, feed, participationId);
+        Comment comment = Comment.createEventComment(
+                message,
+                feed,
+                participationId,
+                type
+        );
+
         commentRepository.save(comment);
     }
 
@@ -97,8 +109,8 @@ public void deleteComment(Long commentId, Long memberId) {
         Comment comment = commentRepository.findById(commentId)
                 .orElseThrow(() -> new IllegalArgumentException("댓글이 존재하지 않습니다."));
 
-        if (comment.getCommentType() == CommentType.SYSTEM) {
-            throw new IllegalArgumentException("SYSTEM 댓글은 삭제할 수 없습니다.");
+        if (comment.getCommentType() != CommentType.USER) {
+            throw new IllegalArgumentException("이벤트 댓글은 삭제할 수 없습니다.");
         }
 
         if (!comment.getMember().getId().equals(memberId)) {

src/main/java/Mua/Mua_backend/domain/participation/service/ParticipationService.java

@@ -1,5 +1,6 @@
 package Mua.Mua_backend.domain.participation.service;
 
+import Mua.Mua_backend.domain.comment.entity.CommentType;
 import Mua.Mua_backend.domain.comment.service.CommentService;
 import Mua.Mua_backend.domain.feed.entity.Feed;
 import Mua.Mua_backend.domain.feed.repository.FeedRepository;
@@ -56,7 +57,12 @@ public void apply(Long feedId, Member member) {
         participationRepository.save(participation);
 
         String message = member.getNickname() + "님이 참가 신청했습니다.";
-        commentService.createSystemComment(feed.getId(), message, participation.getId());
+        commentService.createEventComment(
+                feed.getId(),
+                participation.getId(),
+                message,
+                CommentType.APPLY
+        );
     }
 
     // 참가자 전체 조회
@@ -89,6 +95,15 @@ public void approve(Long participationId, Member writer) {
         Member applicant = participation.getApplicant();
         Feed feed = participation.getFeed();
 
+        String message = applicant.getNickname() + "님의 참가가 승인되었습니다.";
+
+        commentService.createEventComment(
+                feed.getId(),
+                participation.getId(),
+                message,
+                CommentType.APPROVE
+        );
+
         notificationService.sendNotification(
                 applicant,
                 NotificationType.PARTICIPATION_APPROVED,
@@ -110,6 +125,15 @@ public void reject(Long participationId, Member writer) {
         Member applicant = participation.getApplicant();
         Feed feed = participation.getFeed();
 
+        String message = applicant.getNickname() + "님의 참가가 거절되었습니다.";
+
+        commentService.createEventComment(
+                feed.getId(),
+                participation.getId(),
+                message,
+                CommentType.REJECT
+        );
+
         notificationService.sendNotification(
                 applicant,
                 NotificationType.PARTICIPATION_REJECTED,