[FEAT] 라이브 코테 기능 추가 및 멱등성 보강

src/main/java/com/samhap/kokomen/answer/domain/Answer.java

@@ -37,7 +37,7 @@ public class Answer extends BaseEntity {
     @JoinColumn(name = "question_id", nullable = false)
     private Question question;
 
-    @Column(name = "content", nullable = false, length = 2_000)
+    @Column(name = "content", nullable = false, length = 10_000)
     private String content;
 
     @Column(name = "answer_rank", nullable = false)

src/main/java/com/samhap/kokomen/category/domain/Category.java

@@ -1,6 +1,7 @@
 package com.samhap.kokomen.category.domain;
 
 import com.samhap.kokomen.global.constant.AwsConstant;
+import java.util.Arrays;
 import java.util.List;
 import lombok.Getter;
 
@@ -71,7 +72,14 @@ public enum Category {
                     자바스크립트는 웹 브라우저와 서버에서 실행되는 동적 프로그래밍 언어로, 현대 웹 개발의 핵심 기술입니다.
                     주로 자바스크립트의 언어에 대한 이해도를 묻는 질문과 자바스크립트를 동작시키는 엔진, 추가적으로 정적 분석을 위한 타입스크립트에 대한 질문 또한 일부 출제됩니다.
                     """,
-            "kokomen-javascript-typescript.png");
+            "kokomen-javascript-typescript.png"),
+    LIVE_CODING("라이브 코테",
+            """
+                    라이브 코테는 실제 코딩 인터뷰처럼 코딩 문제를 풀고, 제출한 코드에 대해 면접관과 대화하며 진행됩니다.
+                    문제를 해결하는 코드를 작성한 뒤에는 시간·공간 복잡도, 최적화 방안, 엣지 케이스, 자료구조 선택 근거 등에 대한 꼬리 질문이 이어집니다.
+                    단순히 정답 코드를 작성하는 것을 넘어, 자신의 풀이를 설명하고 개선할 수 있는 능력을 평가하는 영역입니다.
+                    """,
+            "kokomen-live-coding.png");
 
     private static final String BASE_URL = AwsConstant.CLOUD_FRONT_DOMAIN_URL + "category-image/";
 
@@ -85,7 +93,9 @@ public enum Category {
         this.imageUrl = BASE_URL + imageUrl;
     }
 
-    private static final List<Category> CATEGORIES = List.of(values());
+    private static final List<Category> CATEGORIES = Arrays.stream(values())
+            .filter(category -> category != LIVE_CODING)
+            .toList();
 
     public static List<Category> getCategories() {
         return CATEGORIES;

src/main/java/com/samhap/kokomen/interview/controller/InterviewControllerV2.java

@@ -9,7 +9,6 @@
 import com.samhap.kokomen.interview.service.dto.proceedstate.InterviewProceedStateResponse;
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
@@ -34,7 +33,8 @@ public ResponseEntity<Void> proceedInterviewBlockAsync(
             @Authentication(required = false) MemberAuth memberAuth,
             ClientIp clientIp
     ) {
-        interviewProceedFacadeService.proceedInterviewByBedrockFlow(interviewId, curQuestionId, answerRequest, memberAuth,
+        interviewProceedFacadeService.proceedInterviewByBedrockFlow(interviewId, curQuestionId, answerRequest,
+                memberAuth,
                 clientIp);
         return ResponseEntity.noContent().build();
     }

src/main/java/com/samhap/kokomen/interview/domain/Interview.java

@@ -123,6 +123,12 @@ public Interview(Member member, RootQuestion rootQuestion, Integer maxQuestionCo
                 InterviewType.CATEGORY_BASED, null, null, 0L, 0L, null, null);
     }
 
+    public Interview(Member member, RootQuestion rootQuestion, Integer maxQuestionCount, InterviewMode interviewMode,
+                     InterviewType interviewType) {
+        this(null, member, rootQuestion, maxQuestionCount, InterviewState.IN_PROGRESS, interviewMode,
+                interviewType, null, null, 0L, 0L, null, null);
+    }
+
     public Interview(Member member, GeneratedQuestion generatedQuestion, Integer maxQuestionCount,
                      InterviewMode interviewMode) {
         this(null, member, null, maxQuestionCount, InterviewState.IN_PROGRESS, interviewMode,
@@ -178,6 +184,10 @@ public boolean isResumeBased() {
         return this.interviewType == InterviewType.RESUME_BASED;
     }
 
+    public boolean isLiveCoding() {
+        return this.interviewType == InterviewType.LIVE_CODING;
+    }
+
     public String getDisplayCategory() {
         if (isResumeBased()) {
             return RESUME_BASED_DISPLAY_CATEGORY;

src/main/java/com/samhap/kokomen/interview/domain/InterviewType.java

@@ -2,5 +2,6 @@
 
 public enum InterviewType {
     CATEGORY_BASED,
-    RESUME_BASED
+    RESUME_BASED,
+    LIVE_CODING
 }

src/main/java/com/samhap/kokomen/interview/external/AnswerFeedbackBedrockClient.java

@@ -31,7 +31,8 @@ public AnswerFeedbackBedrockClient(
 
     public String requestAnswerFeedback(QuestionAndAnswers questionAndAnswers, AnswerRank curAnswerRank) {
         ConverseResponse response = converseClient.converse(
-                InterviewBedrockRequestFactory.createAnswerFeedbackSystem(curAnswerRank),
+                InterviewBedrockRequestFactory.createAnswerFeedbackSystem(
+                        questionAndAnswers.getInterview().getInterviewType(), curAnswerRank),
                 InterviewBedrockRequestFactory.createAnswerFeedbackMessages(questionAndAnswers),
                 InterviewBedrockRequestFactory.createAnswerFeedbackToolConfig(),
                 properties.answerFeedbackMaxTokens(),

src/main/java/com/samhap/kokomen/interview/external/InterviewProceedBedrockClient.java

@@ -36,7 +36,7 @@ public BedrockConverseResponse requestToBedrock(QuestionAndAnswers questionAndAn
 
     private BedrockConverseResponse requestProceed(QuestionAndAnswers questionAndAnswers) {
         ConverseResponse response = converseClient.converse(
-                InterviewBedrockRequestFactory.createProceedSystem(),
+                InterviewBedrockRequestFactory.createProceedSystem(questionAndAnswers.getInterview().getInterviewType()),
                 InterviewBedrockRequestFactory.createProceedMessages(questionAndAnswers),
                 InterviewBedrockRequestFactory.createProceedToolConfig(),
                 properties.proceedMaxTokens(),
@@ -47,7 +47,7 @@ private BedrockConverseResponse requestProceed(QuestionAndAnswers questionAndAns
 
     private BedrockConverseResponse requestEnd(QuestionAndAnswers questionAndAnswers) {
         ConverseResponse response = converseClient.converse(
-                InterviewBedrockRequestFactory.createEndSystem(),
+                InterviewBedrockRequestFactory.createEndSystem(questionAndAnswers.getInterview().getInterviewType()),
                 InterviewBedrockRequestFactory.createProceedMessages(questionAndAnswers),
                 InterviewBedrockRequestFactory.createEndToolConfig(),
                 properties.endMaxTokens(),

src/main/java/com/samhap/kokomen/interview/external/dto/request/InterviewBedrockRequestFactory.java

@@ -2,7 +2,9 @@
 
 import com.samhap.kokomen.answer.domain.Answer;
 import com.samhap.kokomen.answer.domain.AnswerRank;
+import com.samhap.kokomen.interview.domain.InterviewType;
 import com.samhap.kokomen.interview.domain.Question;
+import com.samhap.kokomen.interview.tool.CodingInterviewBedrockSystemMessageConstant;
 import com.samhap.kokomen.interview.tool.InterviewBedrockSystemMessageConstant;
 import com.samhap.kokomen.interview.tool.QuestionAndAnswers;
 import java.util.ArrayList;
@@ -28,22 +30,32 @@ public final class InterviewBedrockRequestFactory {
     private InterviewBedrockRequestFactory() {
     }
 
-    public static List<SystemContentBlock> createProceedSystem() {
+    public static List<SystemContentBlock> createProceedSystem(InterviewType interviewType) {
+        String prompt = interviewType == InterviewType.LIVE_CODING
+                ? CodingInterviewBedrockSystemMessageConstant.CODING_IN_PROGRESS_RANK_AND_NEXT_QUESTION_PROMPT
+                : InterviewBedrockSystemMessageConstant.IN_PROGRESS_RANK_AND_NEXT_QUESTION_PROMPT;
         return List.of(SystemContentBlock.builder()
-                .text(InterviewBedrockSystemMessageConstant.IN_PROGRESS_RANK_AND_NEXT_QUESTION_PROMPT)
+                .text(prompt)
                 .build());
     }
 
-    public static List<SystemContentBlock> createEndSystem() {
+    public static List<SystemContentBlock> createEndSystem(InterviewType interviewType) {
+        String prompt = interviewType == InterviewType.LIVE_CODING
+                ? CodingInterviewBedrockSystemMessageConstant.CODING_END_PROMPT
+                : InterviewBedrockSystemMessageConstant.END_PROMPT;
         return List.of(SystemContentBlock.builder()
-                .text(InterviewBedrockSystemMessageConstant.END_PROMPT)
+                .text(prompt)
                 .build());
     }
 
-    public static List<SystemContentBlock> createAnswerFeedbackSystem(AnswerRank curAnswerRank) {
+    public static List<SystemContentBlock> createAnswerFeedbackSystem(InterviewType interviewType,
+                                                                      AnswerRank curAnswerRank) {
+        String prompt = interviewType == InterviewType.LIVE_CODING
+                ? CodingInterviewBedrockSystemMessageConstant.CODING_ANSWER_FEEDBACK_PROMPT
+                : InterviewBedrockSystemMessageConstant.ANSWER_FEEDBACK_PROMPT;
         return List.of(
                 SystemContentBlock.builder()
-                        .text(InterviewBedrockSystemMessageConstant.ANSWER_FEEDBACK_PROMPT)
+                        .text(prompt)
                         .build(),
                 SystemContentBlock.builder()
                         .text("<context>대상 답변 rank: " + curAnswerRank.name() + "</context>")

src/main/java/com/samhap/kokomen/interview/repository/RootQuestionRepository.java

@@ -50,4 +50,6 @@ Optional<RootQuestion> findRootQuestionByCategoryAndStateAndQuestionOrder(Catego
     List<RootQuestion> findAllByCategoryAndState(Category category, RootQuestionState state);
 
     List<RootQuestion> findAllByState(RootQuestionState state);
+
+    List<RootQuestion> findAllByStateAndCategoryNot(RootQuestionState state, Category category);
 }

src/main/java/com/samhap/kokomen/interview/service/InterviewStartFacadeService.java

@@ -1,5 +1,6 @@
 package com.samhap.kokomen.interview.service;
 
+import com.samhap.kokomen.category.domain.Category;
 import com.samhap.kokomen.global.dto.ClientIp;
 import com.samhap.kokomen.global.dto.MemberAuth;
 import com.samhap.kokomen.global.exception.BadRequestException;
@@ -8,6 +9,7 @@
 import com.samhap.kokomen.interview.domain.GeneratedQuestion;
 import com.samhap.kokomen.interview.domain.Interview;
 import com.samhap.kokomen.interview.domain.InterviewMode;
+import com.samhap.kokomen.interview.domain.InterviewType;
 import com.samhap.kokomen.interview.domain.Question;
 import com.samhap.kokomen.interview.domain.ResumeQuestionGeneration;
 import com.samhap.kokomen.interview.domain.RootQuestion;
@@ -56,13 +58,15 @@ public class InterviewStartFacadeService {
     @Transactional
     public InterviewStartResponse startInterview(InterviewRequest interviewRequest, MemberAuth memberAuth) {
         InterviewMode interviewMode = interviewRequest.mode();
+        validateModeSupportedForCategory(interviewRequest.category(), interviewMode);
         int requiredTokenCount = interviewRequest.maxQuestionCount() * interviewMode.getRequiredTokenCount()
                 - TOKEN_NOT_REQUIRED_FOR_ROOT_QUESTION_VOICE;
         tokenFacadeService.validateEnoughTokens(memberAuth.memberId(), requiredTokenCount);
         Member member = memberService.readById(memberAuth.memberId());
         RootQuestion rootQuestion = rootQuestionService.findNextRootQuestionForMember(member, interviewRequest);
         Interview interview = interviewService.saveInterview(
-                new Interview(member, rootQuestion, interviewRequest.maxQuestionCount(), interviewMode));
+                new Interview(member, rootQuestion, interviewRequest.maxQuestionCount(), interviewMode,
+                        resolveInterviewType(rootQuestion.getCategory())));
         Question question = questionService.saveQuestion(new Question(interview, rootQuestion.getContent()));
 
         if (interviewMode == InterviewMode.VOICE) {
@@ -99,13 +103,15 @@ public static String createGuestInterviewStartedLockKey(ClientIp clientIp) {
     public InterviewStartResponse startRootQuestionCustomInterview(RootQuestionCustomInterviewRequest request,
                                                                    MemberAuth memberAuth) {
         InterviewMode interviewMode = request.mode();
+        RootQuestion rootQuestion = rootQuestionService.readRootQuestion(request.rootQuestionId());
+        validateModeSupportedForCategory(rootQuestion.getCategory(), interviewMode);
         int requiredTokenCount = request.maxQuestionCount() * interviewMode.getRequiredTokenCount()
                 - TOKEN_NOT_REQUIRED_FOR_ROOT_QUESTION_VOICE;
         tokenFacadeService.validateEnoughTokens(memberAuth.memberId(), requiredTokenCount);
         Member member = memberService.readById(memberAuth.memberId());
-        RootQuestion rootQuestion = rootQuestionService.readRootQuestion(request.rootQuestionId());
         Interview interview = interviewService.saveInterview(
-                new Interview(member, rootQuestion, request.maxQuestionCount(), interviewMode));
+                new Interview(member, rootQuestion, request.maxQuestionCount(), interviewMode,
+                        resolveInterviewType(rootQuestion.getCategory())));
         Question question = questionService.saveQuestion(new Question(interview, rootQuestion.getContent()));
 
         if (interviewMode == InterviewMode.VOICE) {
@@ -154,4 +160,14 @@ private void validateGenerationCompleted(ResumeQuestionGeneration generation) {
             throw new BadRequestException("질문 생성이 완료되지 않았습니다.");
         }
     }
+
+    private InterviewType resolveInterviewType(Category category) {
+        return category == Category.LIVE_CODING ? InterviewType.LIVE_CODING : InterviewType.CATEGORY_BASED;
+    }
+
+    private void validateModeSupportedForCategory(Category category, InterviewMode interviewMode) {
+        if (category == Category.LIVE_CODING && interviewMode == InterviewMode.VOICE) {
+            throw new BadRequestException("라이브 코테는 음성 모드를 지원하지 않습니다.");
+        }
+    }
 }

src/main/java/com/samhap/kokomen/interview/service/core/InterviewService.java

@@ -222,7 +222,7 @@ private InterviewResultResponse findGuestInterviewResult(Long interviewId, Clien
     }
 
     private List<RootQuestionReferenceAnswer> getReferenceAnswers(Interview interview) {
-        if (interview.isResumeBased()) {
+        if (interview.isResumeBased() || interview.isLiveCoding()) {
             return List.of();
         }
         return findRootQuestionReferenceAnswers(interview.getRootQuestion().getId(), interview.getId());

src/main/java/com/samhap/kokomen/interview/service/dto/AnswerRequestV2.java

@@ -6,7 +6,7 @@
 import org.hibernate.validator.constraints.Length;
 
 public record AnswerRequestV2(
-        @Length(max = 2000, message = "answer는 최대 2000자까지 입력할 수 있습니다.")
+        @Length(max = 10000, message = "answer는 최대 10000자까지 입력할 수 있습니다.")
         @NotBlank(message = "answer는 비어있을 수 없습니다.")
         String answer,
         @NotNull(message = "mode는 null일 수 없습니다.")

src/main/java/com/samhap/kokomen/interview/service/question/RootQuestionService.java

@@ -28,7 +28,8 @@ public class RootQuestionService {
     private final QuestionVoicePathResolver questionVoicePathResolver;
 
     public RootQuestion readRandomActiveRootQuestion() {
-        List<RootQuestion> rootQuestions = rootQuestionRepository.findAllByState(RootQuestionState.ACTIVE);
+        List<RootQuestion> rootQuestions =
+                rootQuestionRepository.findAllByStateAndCategoryNot(RootQuestionState.ACTIVE, Category.LIVE_CODING);
         if (rootQuestions.isEmpty()) {
             throw new NotFoundException("활성화된 루트 질문이 존재하지 않습니다.");
         }