feat : 반례게시판 이슈 해결 및 정렬을 위한 분기 param 추가 (#404)

Co-authored-by: sh0723 <pshpark12345@naver.com>

Author: junggyo1020

src/main/java/com/gamzabat/algohub/feature/edgecase/controller/EdgeCaseController.java

@@ -1,7 +1,7 @@
 package com.gamzabat.algohub.feature.edgecase.controller;
 
-import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
+import org.springframework.validation.Errors;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PatchMapping;
@@ -14,14 +14,13 @@
 
 import com.gamzabat.algohub.common.annotation.AuthedUser;
 import com.gamzabat.algohub.exception.RequestException;
-import com.gamzabat.algohub.feature.edgecase.domain.EdgeCaseLike;
+import com.gamzabat.algohub.feature.edgecase.domain.EdgeCaseSortType;
 import com.gamzabat.algohub.feature.edgecase.dto.CreateEdgeCaseRequest;
 import com.gamzabat.algohub.feature.edgecase.dto.GetEdgeCaseListResponse;
 import com.gamzabat.algohub.feature.edgecase.dto.TogleEdgeCaseResponse;
 import com.gamzabat.algohub.feature.edgecase.service.EdgeCaseService;
 import com.gamzabat.algohub.feature.user.domain.User;
 
-import org.springframework.validation.Errors;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import jakarta.validation.Valid;
@@ -36,20 +35,24 @@ public class EdgeCaseController {
 
 	@PostMapping
 	@Operation(summary = "반례 등록")
-	public ResponseEntity<Void> createEdgeCase(@AuthedUser User user, @RequestBody @Valid CreateEdgeCaseRequest creatEdgeCaseRequest,
+	public ResponseEntity<Void> createEdgeCase(@AuthedUser User user,
+		@RequestBody @Valid CreateEdgeCaseRequest createEdgeCaseRequest,
 		Errors errors) {
 		if (errors.hasErrors())
 			throw new RequestException("올바르지 않은 요청입니다.", errors);
 
-		edgeCaseService.createEdgeCase(user, creatEdgeCaseRequest);
+		edgeCaseService.createEdgeCase(user, createEdgeCaseRequest);
 
 		return ResponseEntity.ok().build();
 	}
 
 	@GetMapping("/list")
 	@Operation(summary = "반례리스트 조회")
-	public ResponseEntity<GetEdgeCaseListResponse> getEdgeCaseList(@AuthedUser User user, @RequestParam(required = false) Integer problemNumber) {
-		GetEdgeCaseListResponse response = edgeCaseService.getEdgeCaseList(problemNumber);
+	public ResponseEntity<GetEdgeCaseListResponse> getEdgeCaseList(
+		@RequestParam(required = false) Integer problemNumber,
+		@RequestParam(required = false, defaultValue = "RECENT") EdgeCaseSortType sort
+	) {
+		GetEdgeCaseListResponse response = edgeCaseService.getEdgeCaseList(problemNumber, sort);
 
 		return ResponseEntity.ok().body(response);
 	}

src/main/java/com/gamzabat/algohub/feature/edgecase/domain/EdgeCase.java

@@ -1,8 +1,6 @@
 package com.gamzabat.algohub.feature.edgecase.domain;
 
 import java.time.LocalDateTime;
-import java.util.ArrayList;
-import java.util.List;
 
 import org.hibernate.annotations.SQLDelete;
 
@@ -16,8 +14,6 @@
 import jakarta.persistence.Id;
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
-import jakarta.persistence.OneToMany;
-import jakarta.persistence.OneToOne;
 import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
@@ -40,7 +36,6 @@ public class EdgeCase {
 	@Column(columnDefinition = "TEXT")
 	private String output;
 
-
 	@ManyToOne(fetch = FetchType.LAZY)
 	@JoinColumn(name = "user_id")
 	private User author;
@@ -52,14 +47,25 @@ public class EdgeCase {
 	private int likeCount = 0;
 
 	@Builder
-	public EdgeCase(Integer level, String link, Integer problemNumber, String title, String input, String output, User author) {
+	public EdgeCase(Integer level, String link, Integer problemNumber, String title, String input, String output,
+		User author) {
 		this.level = level;
 		this.link = link;
 		this.problemNumber = problemNumber;
 		this.title = title;
 		this.input = input;
 		this.output = output;
 		this.author = author;
+		this.createdAt = LocalDateTime.now();
+	}
+
+	public void increaseLikeCount() {
+		this.likeCount++;
 	}
 
+	public void decreaseLikeCount() {
+		if (this.likeCount > 0) {
+			this.likeCount--;
+		}
+	}
 }

src/main/java/com/gamzabat/algohub/feature/edgecase/domain/EdgeCaseSortType.java

@@ -0,0 +1,7 @@
+package com.gamzabat.algohub.feature.edgecase.domain;
+
+public enum EdgeCaseSortType {
+	RECENT, // 최신순 (기본값)
+	LIKE,   // 좋아요순
+	OLD     // 오래된순
+}

src/main/java/com/gamzabat/algohub/feature/edgecase/repository/EdgeCaseLikeRepository.java

@@ -1,5 +1,6 @@
 package com.gamzabat.algohub.feature.edgecase.repository;
 
+import java.util.List;
 import java.util.Optional;
 
 import org.springframework.data.jpa.repository.JpaRepository;
@@ -10,4 +11,5 @@
 
 public interface EdgeCaseLikeRepository extends JpaRepository<EdgeCaseLike, Long> {
 	Optional<EdgeCaseLike> findByEdgeCaseAndUser(EdgeCase edgeCase, User user);
+	List<EdgeCaseLike> findAllByEdgeCase(EdgeCase edgeCase);
 }

src/main/java/com/gamzabat/algohub/feature/edgecase/repository/EdgeCaseRepository.java

@@ -7,6 +7,18 @@
 import com.gamzabat.algohub.feature.edgecase.domain.EdgeCase;
 
 public interface EdgeCaseRepository extends JpaRepository<EdgeCase, Long> {
+	// RECENT
 	List<EdgeCase> findAllByProblemNumberOrderByCreatedAtDesc(Integer problemNumber);
+
 	List<EdgeCase> findAllByOrderByCreatedAtDesc();
+
+	// LIKE
+	List<EdgeCase> findAllByProblemNumberOrderByLikeCountDesc(Integer problemNumber);
+
+	List<EdgeCase> findAllByOrderByLikeCountDesc();
+
+	// OLD
+	List<EdgeCase> findAllByProblemNumberOrderByCreatedAtAsc(Integer problemNumber);
+
+	List<EdgeCase> findAllByOrderByCreatedAtAsc();
 }

src/main/java/com/gamzabat/algohub/feature/edgecase/service/EdgeCaseService.java

@@ -12,6 +12,7 @@
 import com.fasterxml.jackson.databind.JsonNode;
 import com.gamzabat.algohub.feature.edgecase.domain.EdgeCase;
 import com.gamzabat.algohub.feature.edgecase.domain.EdgeCaseLike;
+import com.gamzabat.algohub.feature.edgecase.domain.EdgeCaseSortType;
 import com.gamzabat.algohub.feature.edgecase.dto.CreateEdgeCaseRequest;
 import com.gamzabat.algohub.feature.edgecase.dto.GetEdgeCaseListResponse;
 import com.gamzabat.algohub.feature.edgecase.dto.GetEdgeCaseResponse;
@@ -44,7 +45,7 @@ public void createEdgeCase(User user, CreateEdgeCaseRequest request) {
 		int level = problemService.getProblemLevel(apiResult);
 		String title = problemService.getProblemTitle(apiResult);
 
-		saveEdgeCase(author,request,level,title,Integer.parseInt(number));
+		saveEdgeCase(author, request, level, title, Integer.parseInt(number));
 	}
 
 	private void saveEdgeCase(User author, CreateEdgeCaseRequest request, int level, String title, int number) {
@@ -54,12 +55,35 @@ private void saveEdgeCase(User author, CreateEdgeCaseRequest request, int level,
 		edgeCaseRepository.save(edgeCase);
 	}
 
-	public GetEdgeCaseListResponse getEdgeCaseList(Integer problemNumber) {
+	public GetEdgeCaseListResponse getEdgeCaseList(Integer problemNumber, EdgeCaseSortType sort) {
 		List<EdgeCase> edgeCaseList;
-		if (problemNumber == null)
-			edgeCaseList = edgeCaseRepository.findAllByOrderByCreatedAtDesc();
-		else
-			edgeCaseList = edgeCaseRepository.findAllByProblemNumberOrderByCreatedAtDesc(problemNumber);
+		if (problemNumber == null) {
+			switch (sort) {
+				case LIKE:
+					edgeCaseList = edgeCaseRepository.findAllByOrderByLikeCountDesc();
+					break;
+				case OLD:
+					edgeCaseList = edgeCaseRepository.findAllByOrderByCreatedAtAsc();
+					break;
+				case RECENT:
+				default:
+					edgeCaseList = edgeCaseRepository.findAllByOrderByCreatedAtDesc();
+					break;
+			}
+		} else {
+			switch (sort) {
+				case LIKE:
+					edgeCaseList = edgeCaseRepository.findAllByProblemNumberOrderByLikeCountDesc(problemNumber);
+					break;
+				case OLD:
+					edgeCaseList = edgeCaseRepository.findAllByProblemNumberOrderByCreatedAtAsc(problemNumber);
+					break;
+				case RECENT:
+				default:
+					edgeCaseList = edgeCaseRepository.findAllByProblemNumberOrderByCreatedAtDesc(problemNumber);
+					break;
+			}
+		}
 
 		List<GetEdgeCaseResponse> responseList = edgeCaseList.stream()
 			.map(edgeCase -> new GetEdgeCaseResponse(
@@ -85,7 +109,8 @@ public void deleteEdgeCase(User user, Long edgeCaseId) {
 
 		if (!user.getId().equals(author.getId()))
 			throw new NotAuthorizedUserException("반례를 삭제할 권한이 없습니다.", HttpStatus.FORBIDDEN);
-
+		List<EdgeCaseLike> likes = edgeCaseLikeRepository.findAllByEdgeCase(edgeCase);
+		edgeCaseLikeRepository.deleteAll(likes);
 		edgeCaseRepository.delete(edgeCase);
 	}
 
@@ -94,21 +119,21 @@ public TogleEdgeCaseResponse togleEdgeCaseLike(User user, Long edgeCaseId) {
 		EdgeCase edgeCase = edgeCaseRepository.findById(edgeCaseId)
 			.orElseThrow(() -> new CannotFoundEdgeCaseException("존재하지 않는 반례입니다.", HttpStatus.NOT_FOUND));
 
-		EdgeCaseLike edgeCaseLike = edgeCaseLikeRepository.findByEdgeCaseAndUser(edgeCase,user).orElse(null);
+		EdgeCaseLike edgeCaseLike = edgeCaseLikeRepository.findByEdgeCaseAndUser(edgeCase, user).orElse(null);
 		Boolean isLike = false;
 		if (edgeCaseLike == null) {
 			edgeCaseLike = EdgeCaseLike.builder().user(user).edgeCase(edgeCase).build();
 			edgeCaseLikeRepository.save(edgeCaseLike);
-
+			edgeCase.increaseLikeCount();
 			isLike = true;
 		} else {
 			edgeCaseLikeRepository.delete(edgeCaseLike);
+			edgeCase.decreaseLikeCount();
 		}
 
 		return new TogleEdgeCaseResponse(isLike);
 	}
 
-
 	private String getProblemId(String url) {
 		String[] parts = url.split("/");
 		if (parts.length < 3 || !parts[2].equals(BOJ_URL))