[feat/#94] 사용자 새끼문항 조회 api 구현

Author: seokbeom00

src/main/java/com/moplus/moplus_server/client/submit/controller/ClientGetController.java

@@ -1,6 +1,7 @@
 package com.moplus.moplus_server.client.submit.controller;
 
 import com.moplus.moplus_server.client.submit.dto.response.AllProblemGetResponse;
+import com.moplus.moplus_server.client.submit.dto.response.ChildProblemClientGetResponse;
 import com.moplus.moplus_server.client.submit.dto.response.CommentaryGetResponse;
 import com.moplus.moplus_server.client.submit.dto.response.ProblemClientGetResponse;
 import com.moplus.moplus_server.client.submit.service.ClientGetService;
@@ -49,4 +50,14 @@ public ResponseEntity<ProblemClientGetResponse> getProblem(
     ) {
         return ResponseEntity.ok(clientGetService.getProblem(publishId, problemId));
     }
+
+    @GetMapping("problem/{publishId}/{problemId}/{childProblemId}")
+    @Operation(summary = "새끼문항 조회", description = "사용자에게 보여지는 새끼문항을 조회합니다.")
+    public ResponseEntity<ChildProblemClientGetResponse> getChildProblem(
+            @PathVariable Long publishId,
+            @PathVariable Long problemId,
+            @PathVariable Long childProblemId
+    ) {
+        return ResponseEntity.ok(clientGetService.getChildProblem(publishId, problemId, childProblemId));
+    }
 }

src/main/java/com/moplus/moplus_server/client/submit/dto/response/ChildProblemClientGetResponse.java

@@ -0,0 +1,23 @@
+package com.moplus.moplus_server.client.submit.dto.response;
+
+import com.moplus.moplus_server.client.submit.domain.ChildProblemSubmitStatus;
+import lombok.Builder;
+
+@Builder
+public record ChildProblemClientGetResponse(
+        int problemNumber,
+        int childProblemNumber,
+        String imageUrl,
+        ChildProblemSubmitStatus status
+) {
+    public static ChildProblemClientGetResponse of(int problemNumber, int childProblemNumber, String imageUrl,
+                                                   ChildProblemSubmitStatus status
+    ) {
+        return ChildProblemClientGetResponse.builder()
+                .problemNumber(problemNumber)
+                .childProblemNumber(childProblemNumber)
+                .imageUrl(imageUrl)
+                .status(status)
+                .build();
+    }
+}

src/main/java/com/moplus/moplus_server/client/submit/service/ClientGetService.java

@@ -7,6 +7,7 @@
 import com.moplus.moplus_server.client.submit.domain.ProblemSubmit;
 import com.moplus.moplus_server.client.submit.domain.ProblemSubmitStatus;
 import com.moplus.moplus_server.client.submit.dto.response.AllProblemGetResponse;
+import com.moplus.moplus_server.client.submit.dto.response.ChildProblemClientGetResponse;
 import com.moplus.moplus_server.client.submit.dto.response.ChildProblemDetailResponse;
 import com.moplus.moplus_server.client.submit.dto.response.CommentaryGetResponse;
 import com.moplus.moplus_server.client.submit.dto.response.DayProgress;
@@ -17,6 +18,7 @@
 import com.moplus.moplus_server.client.submit.repository.ProblemSubmitRepository;
 import com.moplus.moplus_server.domain.problem.domain.childProblem.ChildProblem;
 import com.moplus.moplus_server.domain.problem.domain.problem.Problem;
+import com.moplus.moplus_server.domain.problem.repository.ChildProblemRepository;
 import com.moplus.moplus_server.domain.problem.repository.ProblemRepository;
 import com.moplus.moplus_server.domain.problemset.repository.ProblemSetRepository;
 import com.moplus.moplus_server.domain.publish.repository.PublishRepository;
@@ -38,6 +40,7 @@ public class ClientGetService {
     private final ProblemRepository problemRepository;
     private final ProblemSetRepository problemSetRepository;
     private final ChildProblemSubmitRepository childProblemSubmitRepository;
+    private final ChildProblemRepository childProblemRepository;
 
 
     @Transactional(readOnly = true)
@@ -125,6 +128,7 @@ private String getMainProblemImageUrl(Long problemSetId) {
     public ProblemClientGetResponse getProblem(Long publishId, Long problemId) {
         Long memberId = 1L;
 
+        // 문항조회
         Problem problem = problemRepository.findByIdElseThrow(problemId);
 
         // 문항 제출 조회
@@ -143,4 +147,27 @@ public ProblemClientGetResponse getProblem(Long publishId, Long problemId) {
 
         return ProblemClientGetResponse.of(problem, problemSubmit.getStatus(), childProblemStatuses);
     }
+
+    @Transactional(readOnly = true)
+    public ChildProblemClientGetResponse getChildProblem(Long publishId, Long problemId, Long childProblemId) {
+        Long memberId = 1L;
+
+        // 문항/새끼문항 조회
+        Problem problem = problemRepository.findByIdElseThrow(problemId);
+        ChildProblem childProblem = childProblemRepository.findByIdElseThrow(childProblemId);
+
+        // 새끼문항 제출 조회
+        ChildProblemSubmit childProblemSubmit = childProblemSubmitRepository.findByMemberIdAndPublishIdAndChildProblemIdElseThrow(
+                memberId, publishId, childProblemId);
+
+        int sequence = 0;
+        for (int i = 0; i < problem.getChildProblems().size(); i++) {
+            if (problem.getChildProblems().get(i).getId().equals(childProblemId)) {
+                sequence = i + 1;
+                break;
+            }
+        }
+
+        return ChildProblemClientGetResponse.of(problem.getNumber(), sequence, childProblem.getImageUrl(), childProblemSubmit.getStatus());
+    }
 }