[feat] 채팅목록 조회 구현

src/main/java/site/billbill/apiserver/api/chat/controller/ChatController.java

@@ -2,6 +2,7 @@
 
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
+import java.util.List;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.jboss.logging.MDC;
@@ -11,9 +12,11 @@
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 import site.billbill.apiserver.api.chat.dto.request.ChatRequest;
 import site.billbill.apiserver.api.chat.dto.response.ChatResponse;
+import site.billbill.apiserver.api.chat.dto.response.ChatResponse.ViewChatInfoResponse;
 import site.billbill.apiserver.api.chat.service.ChatService;
 import site.billbill.apiserver.common.response.BaseResponse;
 import site.billbill.apiserver.common.utils.jwt.JWTUtil;
@@ -29,24 +32,28 @@ public class ChatController {
     @Operation(summary = "채팅방 나가기", description = "채팅방 나가기 API")
     @PatchMapping("/{channelId}")
     public BaseResponse<String> leaveChatChannel(@PathVariable(value = "channelId") String channelId) {
-        log.info("api 호출 정상적~");
         String userId = MDC.get(JWTUtil.MDC_USER_ID).toString();
         return new BaseResponse<>(chatService.leaveChatChannel(channelId,userId));
     }
 
     @Operation(summary = "채팅방 생성 및 id 조회", description = "빌리기 버튼 누를 때 api")
     @PostMapping("")
     public BaseResponse<String> startChannel(@RequestBody ChatRequest.borrowInfo request) {
-        log.info("api 호출 정상적~");
         String userId = MDC.get(JWTUtil.MDC_USER_ID).toString();
         return new BaseResponse<>(chatService.startChannel(request, userId));
     }
 
     @Operation(summary = "채팅방 info 조회", description = "채팅방 info 조회 API")
     @GetMapping("/{channelId}")
     public BaseResponse<ChatResponse.ViewChannelInfoResponse> getInfoChannel(@PathVariable(value = "channelId") String channelId) {
-        log.info("api 호출 정상적~");
         String userId = MDC.get(JWTUtil.MDC_USER_ID).toString();
-        return new BaseResponse<>(chatService.getInfoChannel(channelId,userId));
+        return new BaseResponse<>(chatService.getInfoChannel(channelId, userId));
+    }
+
+    @Operation(summary = "채팅목록 조회", description = "채팅목록 조회 API")
+    @GetMapping("/list")
+    public BaseResponse<List<ViewChatInfoResponse>> getChatList(@RequestParam(required = false) String beforeTimestamp) {
+        String userId = MDC.get(JWTUtil.MDC_USER_ID).toString();
+        return new BaseResponse<>(chatService.getChatList(beforeTimestamp, userId));
     }
 }

src/main/java/site/billbill/apiserver/api/chat/converter/ChatConverter.java

@@ -1,6 +1,7 @@
 package site.billbill.apiserver.api.chat.converter;
 
 import java.time.LocalDate;
+import site.billbill.apiserver.api.chat.dto.request.WebhookRequest.ChatInfo;
 import site.billbill.apiserver.api.chat.dto.response.ChatResponse;
 import site.billbill.apiserver.model.chat.ChatChannelJpaEntity;
 import site.billbill.apiserver.model.post.ItemsJpaEntity;
@@ -19,7 +20,9 @@ public static ChatChannelJpaEntity toChatChannel(String channelId, ItemsJpaEntit
                 .build();
     }
 
-    public static ChatResponse.ViewChannelInfoResponse toViewChannelInfo(ChatChannelJpaEntity channel, UserJpaEntity opponent, ItemsJpaEntity item, int totalPrice,
+    public static ChatResponse.ViewChannelInfoResponse toViewChannelInfo(ChatChannelJpaEntity channel,
+                                                                         UserJpaEntity opponent, ItemsJpaEntity item,
+                                                                         int totalPrice,
                                                                          String status, String userId) {
 
         return ChatResponse.ViewChannelInfoResponse.builder()
@@ -36,4 +39,26 @@ public static ChatResponse.ViewChannelInfoResponse toViewChannelInfo(ChatChannel
                 .myId(userId)
                 .build();
     }
+
+    public static ChatResponse.ViewChatInfoResponse toViewChatInfo(ChatInfo chatInfo,
+                                                                           String userId, UserJpaEntity opponent,
+                                                                           ItemsJpaEntity item) {
+        int unReadCount = chatInfo.getUnreadCount();
+
+        if (chatInfo.getLastSender().equals(userId)) {
+            unReadCount = 0;
+        }
+
+        return ChatResponse.ViewChatInfoResponse.builder()
+                .channelId(chatInfo.getChannelId())
+                .lastChat(chatInfo.getLastChat())
+                .lastSender(chatInfo.getLastSender())
+                .updatedAt(chatInfo.getUpdatedAt())
+                .unreadCount(unReadCount)
+                .opponentId(opponent.getUserId())
+                .opponentProfileUrl(opponent.getProfile())
+                .opponentNickname(opponent.getNickname())
+                .itemFirstUrl(item.getImages().get(0))
+                .build();
+    }
 }

src/main/java/site/billbill/apiserver/api/chat/dto/request/WebhookRequest.java

@@ -0,0 +1,27 @@
+package site.billbill.apiserver.api.chat.dto.request;
+
+import java.time.LocalDateTime;
+import java.util.List;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+public class WebhookRequest {
+    @Getter
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class ChatInfo {
+        private String channelId;
+        private int unreadCount;
+        private String lastChat;
+        private String lastSender;
+        private LocalDateTime updatedAt;
+    }
+
+    @Getter
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class ChatInfoList {
+        private List<ChatInfo> chatInfoList;
+    }
+}

src/main/java/site/billbill/apiserver/api/chat/dto/response/ChatResponse.java

@@ -2,6 +2,8 @@
 
 import com.fasterxml.jackson.annotation.JsonFormat;
 import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.util.List;
 import lombok.Builder;
 import lombok.Getter;
 
@@ -23,4 +25,18 @@ public static class ViewChannelInfoResponse {
         @JsonFormat(pattern = "yyyy-MM-dd")
         LocalDate endedAt;
     }
+
+    @Getter
+    @Builder
+    public static class ViewChatInfoResponse {
+        private String channelId;
+        private int unreadCount;
+        private String lastChat;
+        private String lastSender;
+        private LocalDateTime updatedAt;
+        private String opponentId;
+        private String opponentNickname;
+        private String opponentProfileUrl;
+        private String itemFirstUrl;
+    }
 }

src/main/java/site/billbill/apiserver/api/chat/service/ChatService.java

@@ -1,12 +1,16 @@
 package site.billbill.apiserver.api.chat.service;
 
+import java.util.List;
 import site.billbill.apiserver.api.chat.dto.request.ChatRequest;
 import site.billbill.apiserver.api.chat.dto.response.ChatResponse.ViewChannelInfoResponse;
+import site.billbill.apiserver.api.chat.dto.response.ChatResponse.ViewChatInfoResponse;
 
 public interface ChatService {
     String leaveChatChannel(String postId, String userId);
 
     ViewChannelInfoResponse getInfoChannel(String channelId, String userId);
 
     String startChannel(ChatRequest.borrowInfo request, String userId);
+
+    List<ViewChatInfoResponse> getChatList(String beforeTimestamp, String userId);
 }

src/main/java/site/billbill/apiserver/api/chat/service/ChatServiceImpl.java

@@ -1,16 +1,19 @@
 package site.billbill.apiserver.api.chat.service;
 
 import java.time.temporal.ChronoUnit;
+import java.util.Collections;
 import java.util.List;
+import java.util.stream.Collectors;
 import lombok.RequiredArgsConstructor;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import site.billbill.apiserver.api.chat.converter.ChatConverter;
 import site.billbill.apiserver.api.chat.dto.request.ChatRequest;
+import site.billbill.apiserver.api.chat.dto.request.WebhookRequest.ChatInfo;
+import site.billbill.apiserver.api.chat.dto.request.WebhookRequest.ChatInfoList;
 import site.billbill.apiserver.api.chat.dto.response.ChatResponse;
+import site.billbill.apiserver.api.chat.dto.response.ChatResponse.ViewChatInfoResponse;
 import site.billbill.apiserver.common.enums.exception.ErrorCode;
 import site.billbill.apiserver.common.utils.ULID.ULIDUtil;
 import site.billbill.apiserver.exception.CustomException;
@@ -27,7 +30,6 @@
 @RequiredArgsConstructor
 @Transactional(readOnly = true)
 public class ChatServiceImpl implements ChatService {
-    private static final Logger log = LoggerFactory.getLogger(ChatServiceImpl.class);
     private final ChatRepository chatRepository;
     private final UserRepository userRepository;
     private final ItemsRepository itemsRepository;
@@ -89,4 +91,25 @@ public ChatResponse.ViewChannelInfoResponse getInfoChannel(String channelId, Str
 
         return ChatConverter.toViewChannelInfo(chatChannel, opponent, item, totalPrice, status, userId);
     }
+
+    public List<ViewChatInfoResponse> getChatList(String beforeTimestamp, String userId) {
+        userRepository.findById(userId)
+                .orElseThrow(() -> new CustomException(ErrorCode.NotFound, "회원을 찾을 수 없습니다.", HttpStatus.NOT_FOUND));
+
+        List<String> activeChatIdsByUserId = chatRepository.findActiveChatIdsByUserId(userId);
+
+        if (activeChatIdsByUserId == null || activeChatIdsByUserId.isEmpty()) {
+            return Collections.emptyList();
+        }
+
+        ChatInfoList webhookResult = webhookService.sendWebhookForChatList(activeChatIdsByUserId, beforeTimestamp);
+        List<ChatInfo> chatInfoList = webhookResult.getChatInfoList();
+
+        return chatInfoList.stream().map(chatInfo -> {
+            ChatChannelJpaEntity chatChannel = chatRepository.findById(chatInfo.getChannelId())
+                    .orElseThrow(() -> new CustomException(ErrorCode.NotFound, "채널을 찾을 수 없습니다.", HttpStatus.NOT_FOUND));
+            UserJpaEntity opponent = chatChannel.getOpponent(userId);
+            return ChatConverter.toViewChatInfo(chatInfo, userId, opponent, chatChannel.getItem());
+        }).collect(Collectors.toList());
+    }
 }

src/main/java/site/billbill/apiserver/api/chat/service/WebhookService.java

@@ -1,5 +1,9 @@
 package site.billbill.apiserver.api.chat.service;
 
+import java.util.List;
+import site.billbill.apiserver.api.chat.dto.request.WebhookRequest;
+
 public interface WebhookService {
     void sendWebhookForChatRoomCreate(String channelId, String contact, String owner);
+    WebhookRequest.ChatInfoList sendWebhookForChatList(List<String> chatRoomIds, String beforeTimestamp);
 }

src/main/java/site/billbill/apiserver/api/chat/service/WebhookServiceImpl.java

@@ -1,24 +1,33 @@
 package site.billbill.apiserver.api.chat.service;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpStatus;
 import org.springframework.stereotype.Service;
 import org.springframework.web.reactive.function.client.WebClient;
+import site.billbill.apiserver.api.chat.dto.request.WebhookRequest;
+import site.billbill.apiserver.common.enums.exception.ErrorCode;
+import site.billbill.apiserver.exception.CustomException;
 
 @Slf4j
 @Service
-public class WebhookServiceImpl {
+public class WebhookServiceImpl implements WebhookService {
     private final WebClient webClient;
+    private final ObjectMapper objectMapper;
 
     @Value("${webhook.url}")
     private String webhookUrl;
 
     @Autowired
-    public WebhookServiceImpl(WebClient.Builder webClientBuilder) {
+    public WebhookServiceImpl(WebClient.Builder webClientBuilder, ObjectMapper objectMapper) {
         this.webClient = webClientBuilder.baseUrl(webhookUrl).build();
+        this.objectMapper = objectMapper;
     }
 
     public void sendWebhookForChatRoomCreate(String channelId, String contact, String owner) {
@@ -27,12 +36,33 @@ public void sendWebhookForChatRoomCreate(String channelId, String contact, Strin
         payload.put("contactId", contact);
         payload.put("ownerId", owner);
 
-        webClient.post()
-                .uri("")
-                .bodyValue(payload)
+        try {
+            webClient.post()
+                    .uri("/channel")
+                    .bodyValue(payload)
+                    .retrieve()
+                    .bodyToMono(Void.class)
+                    .block();
+        } catch (Exception e) {
+            log.error("Webhook 호출 실패: {}", e.getMessage());
+            throw new CustomException(ErrorCode.ServerError, "Webhook 호출 실패", HttpStatus.BAD_GATEWAY);
+        }
+    }
+
+    public WebhookRequest.ChatInfoList sendWebhookForChatList(List<String> chatRoomIds, String beforeTimestamp) {
+        String jsonResponse = webClient.post()
+                .uri("/chat/list")
+                .bodyValue(Map.of(
+                        "chatRoomIds", chatRoomIds,
+                        "beforeTimestamp", beforeTimestamp
+                ))
                 .retrieve()
-                .bodyToMono(Void.class)
-                .doOnError(error -> log.error("Webhook 호출 실패: {}", error.getMessage()))
-                .subscribe();
+                .bodyToMono(String.class)
+                .block();
+        try {
+            return objectMapper.readValue(jsonResponse, WebhookRequest.ChatInfoList.class);
+        } catch (JsonProcessingException e) {
+            throw new RuntimeException(e);
+        }
     }
 }

src/main/java/site/billbill/apiserver/common/enums/chat/ChannelState.java

@@ -2,7 +2,6 @@
 
 public enum ChannelState {
     PRE,   // 거래전
-    ACCEPTED, // 거래수락
     CONFIRMED, // 거래확정
     CANCELLED // 거래취소
 }

src/main/java/site/billbill/apiserver/repository/chat/ChatRepository.java

@@ -4,6 +4,7 @@
 import java.util.List;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 import site.billbill.apiserver.model.chat.ChatChannelJpaEntity;
 import site.billbill.apiserver.model.post.ItemsJpaEntity;
 import site.billbill.apiserver.model.user.UserJpaEntity;
@@ -25,4 +26,10 @@ public interface ChatRepository extends JpaRepository<ChatChannelJpaEntity,Strin
             "And c.contact = :user "
     )
     List<ChatChannelJpaEntity> findAllByItemAndContactUser(ItemsJpaEntity item, UserJpaEntity user);
+
+    @Query("SELECT c.channelId " +
+            "FROM ChatChannelJpaEntity c " +
+            "WHERE (c.owner.userId = :userId AND c.ownerLeft = false) " +
+            "   OR (c.contact.userId = :userId AND c.contactLeft = false)")
+    List<String> findActiveChatIdsByUserId(String userId);
 }