[Feat] 현재 위치한 채팅방에서 온 알림인 경우 생략 #390

app/src/main/java/com/project200/undabang/di/RepositoryModule.kt

@@ -0,0 +1,17 @@
+package com.project200.undabang.di
+
+import com.project200.common.utils.ChatRoomStateRepository
+import com.project200.undabang.fcm.ChatRoomStateRepositoryImpl
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+abstract class RepositoryModule {
+    @Binds
+    @Singleton
+    abstract fun bindChatRoomStateRepository(impl: ChatRoomStateRepositoryImpl): ChatRoomStateRepository
+}

app/src/main/java/com/project200/undabang/fcm/ChatRoomStateRepositoryImpl.kt

@@ -0,0 +1,19 @@
+package com.project200.undabang.fcm
+
+import com.project200.common.utils.ChatRoomStateRepository
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class ChatRoomStateRepositoryImpl
+    @Inject
+    constructor() : ChatRoomStateRepository {
+        private val _activeChatRoomId = MutableStateFlow<Long?>(null)
+        override val activeChatRoomId = _activeChatRoomId.asStateFlow()
+
+        override fun setActiveChatRoomId(roomId: Long?) {
+            _activeChatRoomId.value = roomId
+        }
+    }

app/src/main/java/com/project200/undabang/fcm/FcmService.kt

@@ -11,6 +11,7 @@ import androidx.core.net.toUri
 import com.google.firebase.messaging.FirebaseMessagingService
 import com.google.firebase.messaging.RemoteMessage
 import com.project200.common.constants.FcmConstants.KEY_FCM_TOKEN
+import com.project200.common.utils.ChatRoomStateRepository
 import com.project200.common.utils.EncryptedPrefs
 import com.project200.undabang.fcm.FcmConstant.CHAT_NOTI_CHANNEL_ID
 import com.project200.undabang.fcm.FcmConstant.CHAT_NOTI_CHANNEL_NAME
@@ -24,6 +25,9 @@ class FcmService : FirebaseMessagingService() {
     @EncryptedPrefs
     lateinit var sharedPreferences: SharedPreferences
 
+    @Inject
+    lateinit var chatRoomStateRepository: ChatRoomStateRepository
+
     /**
      * 새로운 FCM 토큰이 발급되거나 갱신될 때 호출됩니다.
      * 이 토큰은 백엔드 서버로 전송되어 특정 기기에 알림을 보내는 데 사용됩니다.
@@ -62,6 +66,9 @@ class FcmService : FirebaseMessagingService() {
 
         if (chatRoomId == null || nickname == null || memberId == null) return
 
+        // 현재 활성화된 채팅방과 동일한 채팅방에서 온 알림이면 무시
+        if (chatRoomId.toLong() == chatRoomStateRepository.activeChatRoomId.value) return
+
         // 알림 식별을 위한 고유 ID
         val uniqueId = chatRoomId.hashCode()
 

common/src/main/java/com/project200/common/utils/ChatRoomStateRepository.kt

@@ -0,0 +1,20 @@
+package com.project200.common.utils
+
+import kotlinx.coroutines.flow.StateFlow
+
+/**
+ * 앱 전체에서 현재 활성화된 채팅방의 상태를 관리하는 리포지토리 인터페이스
+ */
+interface ChatRoomStateRepository {
+    /**
+     * 현재 활성화된 채팅방의 ID를 StateFlow 형태로 제공합니다.
+     * 활성화된 채팅방이 없으면 null입니다.
+     */
+    val activeChatRoomId: StateFlow<Long?>
+
+    /**
+     * 현재 활성화된 채팅방의 ID를 설정합니다.
+     * @param roomId 채팅방에서 나갈 때는 null을 전달합니다.
+     */
+    fun setActiveChatRoomId(roomId: Long?)
+}

feature/chatting/src/main/java/com/project200/feature/chatting/chattingRoom/ChattingRoomFragment.kt

@@ -22,6 +22,7 @@ import androidx.navigation.fragment.navArgs
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import com.google.android.material.snackbar.Snackbar
+import com.project200.common.utils.ChatRoomStateRepository
 import com.project200.common.utils.CommonDateTimeFormatters.YYYY_MM_DD_KR
 import com.project200.feature.chatting.chattingRoom.adapter.ChatRVAdapter
 import com.project200.feature.chatting.utils.KeyboardVisibilityHelper
@@ -38,13 +39,17 @@ import kotlinx.coroutines.flow.collect
 import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
 import java.time.LocalDate
+import javax.inject.Inject
 
 @AndroidEntryPoint
 class ChattingRoomFragment : BindingFragment<FragmentChattingRoomBinding>(R.layout.fragment_chatting_room), KeyboardControlInterface {
     private val viewModel: ChattingRoomViewModel by viewModels()
     private lateinit var chatAdapter: ChatRVAdapter
     private val args: ChattingRoomFragmentArgs by navArgs()
 
+    @Inject
+    lateinit var chatRoomStateRepository: ChatRoomStateRepository
+
     // 이전 메시지 로드 상태를 추적하는 플래그
     private var isPaging = false
 
@@ -383,6 +388,20 @@ class ChattingRoomFragment : BindingFragment<FragmentChattingRoomBinding>(R.layo
         super.onDestroyView()
     }
 
+    override fun onResume() {
+        super.onResume()
+        // 현재 채팅방을 활성 채팅방으로 설정
+        chatRoomStateRepository.setActiveChatRoomId(args.roomId)
+    }
+
+    override fun onPause() {
+        super.onPause()
+        // 채팅방을 나갈 때 활성 채팅방 ID를 null로 설정
+        if (chatRoomStateRepository.activeChatRoomId.value == args.roomId) {
+            chatRoomStateRepository.setActiveChatRoomId(null)
+        }
+    }
+
     companion object {
         const val POLLING_PERIOD = 2000L
     }