feat: Add comment notifications for posts

Author: saebyeok0306

backend/main-service/src/main/java/io/blog/devlog/domain/comment/controller/CommentController.java

@@ -12,6 +12,8 @@
 import io.blog.devlog.domain.user.service.UserService;
 import io.blog.devlog.global.exception.NoPermissionException;
 import io.blog.devlog.global.exception.NotFoundException;
+import io.blog.devlog.global.redis.message.CommentEmailMessage;
+import io.blog.devlog.global.redis.service.CommentEmailPubService;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.http.ResponseEntity;
@@ -27,9 +29,12 @@
 @RequestMapping("/comments")
 @Slf4j
 public class CommentController {
+
     private final UserService userService;
     private final PostService postService;
     private final CommentService commentService;
+    private final CommentEmailPubService commentEmailPubService;
+
     @PostMapping
     public void uploadComment(@RequestBody RequestCommentDto requestCommentDto) {
         log.info("RequestCommentDto : " + requestCommentDto);
@@ -42,6 +47,16 @@ public void uploadComment(@RequestBody RequestCommentDto requestCommentDto) {
             throw new NoPermissionException("댓글을 작성할 권한이 없습니다.");
         }
         commentService.saveComment(user, requestCommentDto, postDetail.getPost());
+
+        CommentEmailMessage emailMessage = new CommentEmailMessage(
+                postDetail.getPost().getUser().getEmail(),
+                String.format("[devLog] {%s} 게시글에 댓글이 달렸습니다.", postDetail.getPost().getTitle()),
+                postDetail.getPost().getTitle(),
+                postDetail.getPost().getUrl(),
+                requestCommentDto.getContent(),
+                user.getUsername()
+        );
+        commentEmailPubService.sendEmail(emailMessage);
     }
 
     @PostMapping("/{commentId}")

backend/main-service/src/main/java/io/blog/devlog/global/redis/message/CommentEmailMessage.java

@@ -0,0 +1,17 @@
+package io.blog.devlog.global.redis.message;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+@AllArgsConstructor
+public class CommentEmailMessage {
+    private String email;
+    private String subject;
+    private String postName;
+    private String postUrl;
+    private String commentContent;
+    private String commentAuthor;
+}

backend/main-service/src/main/java/io/blog/devlog/global/redis/service/CommentEmailPubService.java

@@ -0,0 +1,19 @@
+package io.blog.devlog.global.redis.service;
+
+import io.blog.devlog.global.redis.message.CommentEmailMessage;
+import io.blog.devlog.global.redis.message.VerifyEmailMessage;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.data.redis.core.RedisTemplate;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+@Slf4j
+public class CommentEmailPubService {
+    private final RedisTemplate<String, Object> redisTemplate;
+
+    public void sendEmail(CommentEmailMessage emailMessage) {
+        redisTemplate.convertAndSend("CommentEmail", emailMessage);
+    }
+}