✨ feat : 카테고리 검색

src/main/java/com/hansung/leafly/domain/book/entity/enums/BookGenre.java

@@ -5,22 +5,29 @@
 
 @RequiredArgsConstructor
 public enum BookGenre {
-    FICTION("소설/시/희곡"),
-    ESSAY("에세이"),
-    SELF_IMPROVEMENT("자기계발"),
-    SCIENCE("과학"),
-    HISTORY("역사"),
-    ECONOMY("경제경영"),
-    ART("예술/대중문화"),
-    HUMANITIES("인문학"),
-    HOME("가정/요리/뷰티"),
-    TRAVEL("여행"),
-    HEALTH("건강/취미/레저");
+    FICTION("소설/시/희곡", "1"),
+    ESSAY("에세이", "55889"),
+    SELF_IMPROVEMENT("자기계발", "336"),
+    SCIENCE("과학", "987"),
+    HISTORY("역사", "74"),
+    ECONOMY("경제경영", "170"),
+    ART("예술/대중문화", "517"),
+    HUMANITIES("인문학", "656"),
+    HOME("가정/요리/뷰티", "1230"),
+    TRAVEL("여행", "1196"),
+    HEALTH("건강/취미/레저", "55890"),
 
-    private final String value;
+    ALL("전체", null);
+
+    private final String value;      // 한글 노출 이름
+    private final String categoryId; // Aladin CategoryId
 
     @JsonValue
     public String getValue() {
         return value;
     }
+
+    public String getCategoryId() {
+        return categoryId;
+    }
 }

src/main/java/com/hansung/leafly/domain/book/service/BookService.java

@@ -1,5 +1,6 @@
 package com.hansung.leafly.domain.book.service;
 
+import com.hansung.leafly.domain.book.entity.enums.BookGenre;
 import com.hansung.leafly.domain.book.web.dto.BookFilterReq;
 import com.hansung.leafly.domain.book.web.dto.BookInfoRes;
 import com.hansung.leafly.domain.book.web.dto.SearchRes;
@@ -14,4 +15,6 @@ public interface BookService {
     BookInfoRes details(Long isbn, Member member);
 
     BookInfoRes ocr(MultipartFile file, Member member);
+
+    List<SearchRes> category(BookGenre genre, Member member);
 }

src/main/java/com/hansung/leafly/domain/book/service/BookServiceImpl.java

@@ -15,6 +15,7 @@
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.multipart.MultipartFile;
 
 import java.util.HashSet;
@@ -25,6 +26,7 @@
 
 @Service
 @RequiredArgsConstructor
+@Transactional(readOnly = true)
 @Slf4j
 public class BookServiceImpl implements BookService {
     private final AladinClient aladinClient;
@@ -101,6 +103,35 @@ public BookInfoRes ocr(MultipartFile file, Member member) {
         return details(isbn, member);
     }
 
+    @Override
+    public List<SearchRes> category(BookGenre genre, Member member) {
+        AladinSearchRes response;
+
+        if (genre == BookGenre.ALL) {
+            // 전체 → 인기 도서 탐색
+            response = aladinClient.bestSeller();
+        } else {
+            // 장르 검색
+            response = aladinClient.searchByCategory(genre.getCategoryId());
+        }
+
+        if (response == null || response.item() == null) {
+            return List.of();
+        }
+
+        Set<Long> bookmarkedSet = new HashSet<>(
+                bookmarkRepository.findIsbnsByMemberId(member.getId())
+        );
+
+        return response.item().stream()
+                .filter(item -> item.isbn13() != null && !item.isbn13().isBlank())
+                .map(item -> SearchRes.from(
+                        item,
+                        bookmarkedSet.contains(Long.parseLong(item.isbn13()))
+                ))
+                .toList();
+    }
+
     //카테고리 필터링
     private boolean matchesGenre(AladinBookItem item, List<BookGenre> targetGenres) {
         String middle = extractMiddleCategory(item.categoryName());

src/main/java/com/hansung/leafly/domain/book/web/controller/BookController.java

@@ -1,5 +1,6 @@
 package com.hansung.leafly.domain.book.web.controller;
 
+import com.hansung.leafly.domain.book.entity.enums.BookGenre;
 import com.hansung.leafly.domain.book.service.BookService;
 import com.hansung.leafly.domain.book.web.dto.BookFilterReq;
 import com.hansung.leafly.domain.book.web.dto.BookInfoRes;
@@ -54,4 +55,12 @@ public ResponseEntity<SuccessResponse<BookInfoRes>> ocr(
         return  ResponseEntity.status(HttpStatus.OK).body(SuccessResponse.from(res));
     }
 
+    @GetMapping("/category")
+    public ResponseEntity<SuccessResponse<List<SearchRes>>> category(
+        @RequestParam BookGenre genre,
+        @AuthenticationPrincipal CustomMemberDetails memberDetails
+    ){
+        List<SearchRes> res = bookService.category(genre, memberDetails.getMember());
+        return ResponseEntity.status(HttpStatus.OK).body(SuccessResponse.from(res));
+    }
 }

src/main/java/com/hansung/leafly/infra/aladin/AladinClient.java

@@ -66,5 +66,19 @@ public AladinSearchRes searchByCategory(String categoryId) {
 
         return restTemplate.getForObject(uri, AladinSearchRes.class);
     }
+
+    public AladinSearchRes bestSeller() {
+        String uri = UriComponentsBuilder.fromHttpUrl(SEARCH_URL)
+                .queryParam("ttbkey", TTB_KEY)
+                .queryParam("QueryType", "Bestseller")
+                .queryParam("SearchTarget", "Book")
+                .queryParam("MaxResults", 20)
+                .queryParam("output", "js")
+                .queryParam("Version", "20131101")
+                .build()
+                .toUriString();
+
+        return restTemplate.getForObject(uri, AladinSearchRes.class);
+    }
 }