✨ feat: 이벤트에 대한 브로드 캐스팅 메서드 추가

- 이벤트 타입 별 SSE 본문 객체 추가

Author: LimKangHyun

backend/src/main/java/io/f1/backend/domain/game/sse/app/SseService.java

@@ -1,5 +1,6 @@
 package io.f1.backend.domain.game.sse.app;
 
+import io.f1.backend.domain.game.sse.dto.LobbySseEvent;
 import io.f1.backend.domain.game.sse.store.SseEmitterRepository;
 
 import lombok.RequiredArgsConstructor;
@@ -28,4 +29,18 @@ public SseEmitter subscribe() {
         }
         return emitter;
     }
+
+    // 로비로 SSE 메시지를 쏘기위한 메서드
+    public <T> void notifyLobbyUpdate(LobbySseEvent<T> event) {
+        for (SseEmitter emitter : emitterRepository.getAll()) {
+            try {
+                emitter.send(SseEmitter.event()
+                    .name(event.type())
+                    .data(event)
+                );
+            } catch (IOException e) {
+                emitterRepository.remove(emitter);
+            }
+        }
+    }
 }

backend/src/main/java/io/f1/backend/domain/game/sse/dto/LobbySseEvent.java

@@ -0,0 +1,4 @@
+package io.f1.backend.domain.game.sse.dto;
+
+public record LobbySseEvent<T>(String type, T payload) {
+}

backend/src/main/java/io/f1/backend/domain/game/sse/dto/RoomCreatedPayload.java

@@ -0,0 +1,17 @@
+package io.f1.backend.domain.game.sse.dto;
+
+public record RoomCreatedPayload(
+    Long roomId,
+    String roomName,
+    Integer maxUserCount,
+    int currentUserCount,
+    boolean locked,
+    String roomState,
+    String quizTitle,
+    String description,
+    String creator,
+    Integer numberOfQuestion,
+    String thumbnailUrl
+) {
+
+}

backend/src/main/java/io/f1/backend/domain/game/sse/dto/RoomDeletedPayload.java

@@ -0,0 +1,5 @@
+package io.f1.backend.domain.game.sse.dto;
+
+public record RoomDeletedPayload(Long roomId) {
+
+}

backend/src/main/java/io/f1/backend/domain/game/sse/dto/RoomUpdatedPayload.java

@@ -0,0 +1,13 @@
+package io.f1.backend.domain.game.sse.dto;
+
+public record RoomUpdatedPayload(
+    Long roomId,
+    int currentUserCount,
+    String roomState,
+    String quizTitle,
+    String description,
+    String creator,
+    int numberOfQuestion,
+    String thumbnailUrl
+) {
+}

backend/src/main/java/io/f1/backend/domain/game/sse/dto/SseEventType.java

@@ -0,0 +1,7 @@
+package io.f1.backend.domain.game.sse.dto;
+
+public enum SseEventType {
+    CREATE,
+    UPDATE,
+    DELETE
+}

backend/src/main/java/io/f1/backend/domain/game/sse/mapper/SseMapper.java

@@ -0,0 +1,56 @@
+package io.f1.backend.domain.game.sse.mapper;
+
+import io.f1.backend.domain.game.event.RoomCreatedEvent;
+import io.f1.backend.domain.game.event.RoomDeletedEvent;
+import io.f1.backend.domain.game.event.RoomUpdatedEvent;
+import io.f1.backend.domain.game.model.Room;
+import io.f1.backend.domain.game.sse.dto.RoomCreatedPayload;
+import io.f1.backend.domain.game.sse.dto.RoomDeletedPayload;
+import io.f1.backend.domain.game.sse.dto.LobbySseEvent;
+import io.f1.backend.domain.game.sse.dto.RoomUpdatedPayload;
+import io.f1.backend.domain.game.sse.dto.SseEventType;
+import io.f1.backend.domain.quiz.entity.Quiz;
+
+public class SseMapper {
+
+    public static LobbySseEvent<RoomCreatedPayload> fromRoomCreated(RoomCreatedEvent event) {
+        Room room = event.room();
+        Quiz quiz = event.quiz();
+        RoomCreatedPayload payload = new RoomCreatedPayload(
+            room.getId(),
+            room.getRoomSetting().roomName(),
+            room.getRoomSetting().maxUserCount(),
+            room.getPlayerSessionMap().size(),
+            room.getRoomSetting().locked(),
+            room.getState().name(),
+            quiz.getTitle(),
+            quiz.getDescription(),
+            quiz.getCreator().getNickname(),
+            quiz.getQuestions().size(),
+            quiz.getThumbnailUrl()
+        );
+        return new LobbySseEvent<>(SseEventType.CREATE.name(), payload);
+    }
+
+    public static LobbySseEvent<RoomUpdatedPayload> fromRoomUpdated(RoomUpdatedEvent event) {
+        Room room = event.room();
+        Quiz quiz = event.quiz();
+        RoomUpdatedPayload payload = new RoomUpdatedPayload(
+            room.getId(),
+            room.getPlayerSessionMap().size(),
+            room.getState().name(),
+            quiz.getTitle(),
+            quiz.getDescription(),
+            quiz.getCreator().getNickname(),
+            quiz.getQuestions().size(),
+            quiz.getThumbnailUrl()
+        );
+        return new LobbySseEvent<>(SseEventType.UPDATE.name(), payload);
+    }
+
+    public static LobbySseEvent<RoomDeletedPayload> fromRoomDeleted(RoomDeletedEvent event) {
+        Long roomId = event.roomId();
+        RoomDeletedPayload payload = new RoomDeletedPayload(roomId);
+        return new LobbySseEvent<>(SseEventType.DELETE.name(), payload);
+    }
+}