그룹 상세 조회 api

Author: eunhye-ahn

polling-app-server/src/main/java/com/example/polls/controller/GroupController.java

@@ -3,6 +3,7 @@
 import com.example.polls.model.User;
 import com.example.polls.payload.Request.CreateGroupRequest;
 import com.example.polls.payload.Request.JoinGroupRequest;
+import com.example.polls.payload.Response.GroupDetailResponse;
 import com.example.polls.payload.Response.GroupSummaryResponse;
 import com.example.polls.repository.UserRepository;
 import com.example.polls.security.UserPrincipal;
@@ -49,4 +50,19 @@ public ResponseEntity<String> joinGroup(@RequestBody JoinGroupRequest request, @
         return ResponseEntity.ok("그룹에 성공적으로 참여했습니다.");
     }
 
+    //그룹 상세조회
+    @GetMapping("/{groupId}")
+    public ResponseEntity<GroupDetailResponse> getGroupDetail(@PathVariable Long groupId,
+                                                               @AuthenticationPrincipal UserPrincipal userPrincipal) {
+        GroupDetailResponse response = groupService.getGroupDetail(groupId,userPrincipal.getId());
+        return ResponseEntity.ok(response);
+    }
+
+    @GetMapping("{groupId}/members")
+    public ResponseEntity<List<GroupDetailResponse.MemberSummary>> getGroupMembers(@PathVariable Long groupId,
+                                                                                   @AuthenticationPrincipal UserPrincipal userPrincipal) {
+        GroupDetailResponse response = groupService.getGroupDetail(groupId, userPrincipal.getId());
+        return ResponseEntity.ok(response.getMembers());
+    }
+
 }

polling-app-server/src/main/java/com/example/polls/payload/Response/GroupDetailResponse.java

@@ -0,0 +1,26 @@
+package com.example.polls.payload.Response;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+
+import java.util.List;
+
+@Getter
+@Builder
+@AllArgsConstructor
+public class GroupDetailResponse {
+    private Long id;
+    private String name;
+    private String imageUrl;
+    private List<MemberSummary> members;
+
+    @Getter
+    @Builder
+    @AllArgsConstructor
+    public static class MemberSummary {
+        private Long id;
+        private String username;
+        private String email;
+    }
+}

polling-app-server/src/main/java/com/example/polls/service/GroupService.java

@@ -8,6 +8,7 @@
 import com.example.polls.model.GroupRole;
 import com.example.polls.model.User;
 import com.example.polls.payload.Request.CreateGroupRequest;
+import com.example.polls.payload.Response.GroupDetailResponse;
 import com.example.polls.payload.Response.GroupSummaryResponse;
 import com.example.polls.repository.GroupMemberRepository;
 import com.example.polls.repository.GroupRepository;
@@ -107,4 +108,20 @@ public void joinCode(Long userId, String joinCode) {
         groupMemberRepository.save(newMember);
 
     }
+
+    public GroupDetailResponse getGroupDetail(Long groupId, Long userId) {
+        Group group = groupRepository.findById(groupId)
+                .orElseThrow(()-> new ResourceNotFoundException("Group", "id", groupId));
+
+        List<GroupDetailResponse.MemberSummary> members = group.getMembers().stream()
+                .map(member-> new GroupDetailResponse.MemberSummary(
+                        member.getUser().getId(),
+                        member.getUser().getUsername(),
+                        member.getUser().getEmail()
+                ))
+                .collect(Collectors.toList());
+
+        return new GroupDetailResponse(group.getId(),group.getName(),group.getImageUrl(),members);
+
+    }
 }