Refactor#post기능추가

backend/src/main/java/org/juniortown/backend/comment/repository/CommentRepository.java

@@ -3,8 +3,19 @@
 import java.util.List;
 
 import org.juniortown.backend.comment.entity.Comment;
+import org.juniortown.backend.post.dto.response.IdCount;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
 
+@Repository
 public interface CommentRepository extends JpaRepository<Comment, Long> {
 	List<Comment> findByPostIdOrderByCreatedAtAsc(Long postId);
+
+	@Query("SELECT c.post.id AS postId, COUNT(c) AS count "
+		+ "FROM Comment c "
+		+ "WHERE c.post.id IN :postIds "
+		+ "GROUP BY c.post.id")
+	List<IdCount> countByPostIds(@Param("postIds") List<Long> postsIds);
 }

backend/src/main/java/org/juniortown/backend/config/RedisConfig.java

@@ -35,9 +35,10 @@ public RedisTemplate<String, Boolean> keyCheckRedisTemplate(RedisConnectionFacto
 	@Bean
 	public RedisTemplate<String, Long> readCountRedisTemplate(RedisConnectionFactory redisConnectionFactory) {
 		RedisTemplate<String,Long> redisTemplate = new RedisTemplate<>();
-		redisTemplate.setConnectionFactory(redisConnectionFactory);
 		redisTemplate.setKeySerializer(new StringRedisSerializer());
-		redisTemplate.setValueSerializer(new Jackson2JsonRedisSerializer<>(Long.class));
+		redisTemplate.setHashKeySerializer(new StringRedisSerializer());
+		redisTemplate.setHashValueSerializer(new Jackson2JsonRedisSerializer<>(Long.class));
+		redisTemplate.setConnectionFactory(redisConnectionFactory);
 		return redisTemplate;
 	}
 }

backend/src/main/java/org/juniortown/backend/config/SecurityConfig.java

@@ -7,6 +7,7 @@
 import org.juniortown.backend.user.jwt.LoginFilter;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpMethod;
 import org.springframework.security.authentication.AuthenticationManager;
 import org.springframework.security.config.annotation.authentication.configuration.AuthenticationConfiguration;
 import org.springframework.security.config.annotation.web.builders.HttpSecurity;
@@ -77,9 +78,9 @@ public CorsConfiguration getCorsConfiguration(HttpServletRequest request) {
 		//경로별 인가 작업
 		http
 			.authorizeHttpRequests((auth) -> auth
-				.requestMatchers("/api/auth/login", "/", "/api/auth/signup","/swagger-ui/**","/v3/api-docs/**",
-					"/api/posts/details/**", "/actuator/health","/actuator/prometheus").permitAll()
-				.requestMatchers(RegexRequestMatcher.regexMatcher("/api/posts/\\d+")).permitAll()
+				.requestMatchers("/api/auth/login", "/", "/api/auth/signup","/swagger-ui/**","/v3/api-docs/**").permitAll()
+				.requestMatchers(HttpMethod.GET, "/api/posts/details/**", "/api/posts", "/api/posts/home").permitAll()
+				.requestMatchers("/actuator/health","/actuator/prometheus").permitAll()
 				.requestMatchers("/admin").hasRole("ADMIN")
 				.anyRequest().authenticated());
 

backend/src/main/java/org/juniortown/backend/dummyData/DummyDataInit.java

@@ -1,5 +1,6 @@
 package org.juniortown.backend.dummyData;
 
+import org.juniortown.backend.post.entity.Category;
 import org.juniortown.backend.post.entity.Post;
 import org.juniortown.backend.post.repository.PostRepository;
 import org.juniortown.backend.user.entity.User;
@@ -35,18 +36,19 @@ public void run(String... args) throws Exception {
 			.orElseThrow(() -> new RuntimeException("User not found"));
 
 		// 게시글 생성
+		Category[] categories = Category.values();
+		for (int i = 0; i < 25; i++) {
+			createPost("title" + i,"content" + i, user, categories[i % categories.length]);
+		}
+	}
+
+	private void createPost(String Dummy_Post_Title, String content, User user, Category category) {
 		Post testPost1 = Post.builder()
-			.title("Dummy Post Title")
-			.content("This is a dummy post content.")
+			.title(Dummy_Post_Title)
+			.content(content)
 			.user(user)
+			.category(category)
 			.build();
 		postRepository.save(testPost1);
-
-		Post testPost2 = Post.builder()
-			.title("Another Dummy Post Title")
-			.content("This is another dummy post content.")
-			.user(user)
-			.build();
-		postRepository.save(testPost2);
 	}
 }

backend/src/main/java/org/juniortown/backend/like/repository/LikeRepository.java

@@ -1,13 +1,23 @@
 package org.juniortown.backend.like.repository;
 
+import java.util.List;
 import java.util.Optional;
 
 import org.juniortown.backend.like.entity.Like;
+import org.juniortown.backend.post.dto.response.IdCount;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
 
 @Repository
 public interface LikeRepository extends JpaRepository<Like, Long> {
 	Optional<Like> findByUserIdAndPostId(Long userId, Long postId);
 	Long countByPostId(Long postId);
+
+	@Query("SELECT l.post.id AS postId, COUNT(l) AS count "
+		+ "FROM Like l "
+		+ "WHERE l.post.id IN :postIds "
+		+ "GROUP BY l.post.id")
+	List<IdCount> countByPostIds(@Param("postIds")List<Long>postIds);
 }

backend/src/main/java/org/juniortown/backend/post/controller/PostController.java

@@ -1,15 +1,14 @@
 package org.juniortown.backend.post.controller;
 
-import java.util.stream.Collectors;
-
 import org.juniortown.backend.post.dto.request.PostCreateRequest;
+import org.juniortown.backend.post.dto.request.PostEditRequest;
+import org.juniortown.backend.post.dto.response.HomePageResponse;
 import org.juniortown.backend.post.dto.response.PageResponse;
 import org.juniortown.backend.post.dto.response.PostDetailResponse;
-import org.juniortown.backend.post.dto.response.PostWithLikeCount;
 import org.juniortown.backend.post.dto.response.PostResponse;
-import org.juniortown.backend.post.dto.response.PostWithLikeCountProjection;
+import org.juniortown.backend.post.entity.Category;
 import org.juniortown.backend.post.service.PostService;
-import org.juniortown.backend.post.service.ViewCountService;
+import org.juniortown.backend.post.service.ReadCountRedisService;
 import org.juniortown.backend.user.dto.CustomUserDetails;
 import org.springframework.data.domain.Page;
 import org.springframework.http.HttpStatus;
@@ -23,6 +22,7 @@
 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 jakarta.validation.Valid;
@@ -33,7 +33,7 @@
 @RequestMapping("/api")
 public class PostController {
 	private final PostService postService;
-	private final ViewCountService viewCountService;
+	private final ReadCountRedisService readCountRedisService;
 	@PostMapping("/posts")
 	public ResponseEntity<PostResponse> create(@AuthenticationPrincipal CustomUserDetails customUserDetails,
 		@Valid @RequestBody PostCreateRequest postCreateRequest) {
@@ -52,20 +52,22 @@ public ResponseEntity<?> delete(@AuthenticationPrincipal CustomUserDetails custo
 	}
 
 	@PatchMapping("/posts/{postId}")
-	public ResponseEntity<PostResponse> update(@AuthenticationPrincipal CustomUserDetails customUserDetails, @PathVariable Long postId, @Valid @RequestBody PostCreateRequest postCreateRequest) {
+	public ResponseEntity<PostResponse> update(@AuthenticationPrincipal CustomUserDetails customUserDetails, @PathVariable Long postId, @Valid @RequestBody PostEditRequest postEditRequest) {
 		Long userId = customUserDetails.getUserId();
-		PostResponse response = postService.update(postId, userId, postCreateRequest);
+		PostResponse response = postService.update(postId, userId, postEditRequest);
 		// 202가 뭐임?
 		return ResponseEntity.status(HttpStatus.OK).body(response);
 	}
 
 	// 게시글 목록 조회, 페이지네이션 적용
-	@GetMapping("/posts/{page}")
+	@GetMapping("/posts")
 	public ResponseEntity<PageResponse<PostResponse>> getPosts(@AuthenticationPrincipal CustomUserDetails customUserDetails,
-		@PathVariable int page
+		@RequestParam(defaultValue = "0") int page,
+		@RequestParam(defaultValue = "10") int size,
+		@RequestParam(defaultValue = "NOTICE") Category category
 	) {
 		Long userId = (customUserDetails != null) ? customUserDetails.getUserId() : null;
-	 	Page<PostResponse> posts = postService.getPosts(userId, page);
+	 	Page<PostResponse> posts = postService.getPosts(userId, page, size, category);
 		PageResponse<PostResponse> response = new PageResponse<>(posts);
 		return ResponseEntity.ok(response);
 	}
@@ -80,4 +82,12 @@ public ResponseEntity<PostDetailResponse> getPost(@AuthenticationPrincipal Custo
 		return ResponseEntity.ok(postDetailResponse);
 	}
 
+	@GetMapping("/posts/home")
+	public ResponseEntity<HomePageResponse> homePagePosts(
+		@RequestParam(defaultValue = "5") int perCategory
+	){
+		HomePageResponse homePageResponse = postService.homePagePosts(perCategory);
+		return ResponseEntity.ok(homePageResponse);
+	}
+
 }

backend/src/main/java/org/juniortown/backend/post/dto/request/PostCreateRequest.java

@@ -1,5 +1,6 @@
 package org.juniortown.backend.post.dto.request;
 
+import org.juniortown.backend.post.entity.Category;
 import org.juniortown.backend.post.entity.Post;
 import org.juniortown.backend.user.entity.User;
 
@@ -17,16 +18,20 @@ public class PostCreateRequest {
 	private String title;
 	@NotBlank(message = "컨텐츠를 입력해주세요.")
 	private String content;
+	@NotBlank(message = "카테고리를 입력해주세요.")
+	private String category;
 	@Builder
-	public PostCreateRequest(String title, String content) {
+	public PostCreateRequest(String title, String content, String category) {
 		this.title = title;
 		this.content = content;
+		this.category = category;
 	}
 
 	public Post toEntity(User user) {
 		return Post.builder()
 			.title(title)
 			.content(content)
+			.category(Category.from(category))
 			.user(user)
 			.build();
 	}

backend/src/main/java/org/juniortown/backend/post/dto/PostEdit.java → backend/src/main/java/org/juniortown/backend/post/dto/request/PostEditRequest.java

@@ -1,4 +1,4 @@
-package org.juniortown.backend.post.dto;
+package org.juniortown.backend.post.dto.request;
 
 import jakarta.validation.constraints.NotBlank;
 import lombok.Builder;
@@ -8,13 +8,13 @@
 @Getter
 @Builder
 @ToString
-public class PostEdit {
+public class PostEditRequest {
 	@NotBlank(message = "타이틀을 입력해주세요.")
 	private String title;
 	@NotBlank(message = "컨텐츠를 입력해주세요.")
 	private String content;
 	@Builder
-	public PostEdit(String title, String content) {
+	public PostEditRequest(String title, String content) {
 		this.title = title;
 		this.content = content;
 	}

backend/src/main/java/org/juniortown/backend/post/dto/response/HomePageResponse.java

@@ -0,0 +1,20 @@
+package org.juniortown.backend.post.dto.response;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class HomePageResponse {
+	List<HomePageSection> sections;
+	private LocalDateTime createdAt;
+	@Builder
+	public HomePageResponse(List<HomePageSection> sections, LocalDateTime createdAt) {
+		this.sections = sections;
+		this.createdAt = createdAt;
+	}
+}

backend/src/main/java/org/juniortown/backend/post/dto/response/HomePageSection.java

@@ -0,0 +1,19 @@
+package org.juniortown.backend.post.dto.response;
+
+import java.util.List;
+
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class HomePageSection {
+	private String category;
+	private List<PostForHomePage> items;
+	@Builder
+	public HomePageSection(String category, List<PostForHomePage> items) {
+		this.category = category;
+		this.items = items;
+	}
+}

backend/src/main/java/org/juniortown/backend/post/dto/response/IdCount.java

@@ -0,0 +1,6 @@
+package org.juniortown.backend.post.dto.response;
+
+public interface IdCount {
+	Long getPostId();
+	Long getCount();
+}

backend/src/main/java/org/juniortown/backend/post/dto/response/PostForHomePage.java

@@ -0,0 +1,32 @@
+package org.juniortown.backend.post.dto.response;
+
+import java.time.LocalDateTime;
+
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+public class PostForHomePage {
+	private Long postId;
+	private String title;
+	private Long userId;
+	private String nickname;
+	private Long likeCount;
+	private Long commentCount;
+	private Long readCount;
+	private LocalDateTime createdAt;
+	@Builder
+	public PostForHomePage(Long postId, String title, Long userId, String nickname, Long likeCount, Long commentCount,
+			Long readCount, LocalDateTime createdAt) {
+		this.postId = postId;
+		this.title = title;
+		this.userId = userId;
+		this.nickname = nickname;
+		this.likeCount = likeCount;
+		this.commentCount = commentCount;
+		this.readCount = readCount;
+		this.createdAt = createdAt;
+	}
+}

backend/src/main/java/org/juniortown/backend/post/entity/Category.java

@@ -0,0 +1,23 @@
+package org.juniortown.backend.post.entity;
+
+import lombok.Getter;
+
+@Getter
+public enum Category {
+	QUESTION(),
+	STUDY(),
+	NOTICE(),
+	SECOND_HAND_MARKET(),
+	MENTOR();
+
+	public static Category from(String value) {
+		if (value == null) {
+			throw new IllegalArgumentException("Category는 null일 수 없다.");
+		}
+		try {
+			return Category.valueOf(value.toUpperCase());
+		} catch (IllegalArgumentException e) {
+			throw new IllegalArgumentException("유효하지 않은 카테고리입니다: " + value);
+		}
+	}
+}

backend/src/main/java/org/juniortown/backend/post/entity/Post.java

@@ -6,10 +6,13 @@
 
 import org.juniortown.backend.entity.BaseTimeEntity;
 import org.juniortown.backend.post.dto.request.PostCreateRequest;
+import org.juniortown.backend.post.dto.request.PostEditRequest;
 import org.juniortown.backend.user.entity.User;
 
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
@@ -43,20 +46,25 @@ public class Post extends BaseTimeEntity {
 	@Column(name = "read_count", nullable = false)
 	private Long readCount = 0L;
 
+	@Column(nullable = false)
+	@Enumerated(EnumType.STRING)
+	private Category category;
+
 	@Builder
-	public Post(String title, String content, User user) {
+	public Post(String title, String content, User user, Category category) {
 		this.title = title;
 		this.content = content;
 		this.user = user;
+		this.category = category;
 	}
 
 	public void softDelete(Clock clock) {
 		this.deletedAt = LocalDateTime.now(clock);
 	}
 
-	public void update(PostCreateRequest postCreateRequest, Clock clock) {
-		this.title = postCreateRequest.getTitle();
-		this.content = postCreateRequest.getContent();
+	public void update(String title, String content) {
+		this.title = title;
+		this.content = content;
 	}
 
 	public void addReadCount(Long redisReadCount) {