[feat/#127] 책 한 권 조회 API의 반환 값에 description 컬럼 추가

src/main/java/com/techeer/checkIt/domain/book/dto/Response/BookRes.java

@@ -20,4 +20,5 @@ public class BookRes {
     private int pages;
     private int likes;
     private boolean likeStatus;
+    private String description;
 }

src/main/java/com/techeer/checkIt/domain/book/dto/Response/BookResVO.java

@@ -0,0 +1,22 @@
+package com.techeer.checkIt.domain.book.dto.Response;
+
+import lombok.*;
+
+import java.util.List;
+
+
+@Getter
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+public class BookResVO {
+    private List<Item> items;
+
+    @Getter
+    @Builder
+    @NoArgsConstructor
+    @AllArgsConstructor(access = lombok.AccessLevel.PRIVATE)
+    public static class Item {
+        private String description;
+    }
+}

src/main/java/com/techeer/checkIt/domain/book/mapper/BookMapper.java

@@ -15,7 +15,7 @@
 
 @Component
 public class BookMapper {
-    public BookRes toDto(Book book, int likes, boolean likeStatus) {
+    public BookRes toDto(Book book, int likes, boolean likeStatus, String description) {
         return BookRes.builder()
             .id(book.getId())
             .title(book.getTitle())
@@ -27,6 +27,7 @@ public BookRes toDto(Book book, int likes, boolean likeStatus) {
             .pages(book.getPages())
             .likes(likes)
             .likeStatus(likeStatus)
+            .description(description)
             .build();
     }
     public BookSearchRes toBookSearchDto(BookDocument book) {

src/main/java/com/techeer/checkIt/domain/book/service/BookSearchService.java

@@ -0,0 +1,60 @@
+package com.techeer.checkIt.domain.book.service;
+
+import com.techeer.checkIt.domain.book.dto.Response.BookResVO;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.http.*;
+import org.springframework.stereotype.Service;
+import org.springframework.web.client.RestTemplate;
+import org.springframework.web.util.UriComponentsBuilder;
+
+import java.net.URI;
+import java.nio.charset.StandardCharsets;
+
+@Service
+@Slf4j
+public class BookSearchService {
+    private final RestTemplate restTemplate;
+
+    @Value("${naver.client.id}")
+    private String CLIENT_ID;
+
+    @Value("${naver.client.secret}")
+    private String CLIENT_SECRET;
+
+    private  final String SEARCH_URL = "https://openapi.naver.com/v1/search/book.json";
+
+    public BookSearchService(RestTemplateBuilder restTemplateBuilder) {
+        this.restTemplate = restTemplateBuilder.build();
+    }
+
+    public String getBookDescriptionByTitle(String title){
+        final HttpHeaders headers = new HttpHeaders();
+        headers.set("X-Naver-Client-Id", CLIENT_ID);
+        headers.set("X-Naver-Client-Secret", CLIENT_SECRET);
+
+        URI targetUrl = UriComponentsBuilder
+                .fromUriString(SEARCH_URL)
+                .queryParam("query", title)
+                .build()
+                .encode(StandardCharsets.UTF_8)
+                .toUri();
+
+        HttpEntity<?> entity = new HttpEntity<>(headers);
+
+        // 네이버 API 요청 보내기
+        ResponseEntity<BookResVO> response = restTemplate.exchange(
+                targetUrl,
+                HttpMethod.GET,
+                entity,
+                BookResVO.class
+        );
+
+        BookResVO bookResponse = response.getBody();
+        if (bookResponse != null && !bookResponse.getItems().isEmpty()) {
+            return bookResponse.getItems().get(0).getDescription();
+        }
+        return null;
+    }
+}

src/main/java/com/techeer/checkIt/domain/book/service/BookService.java

@@ -29,6 +29,7 @@ public class BookService {
     private final BookSearchRepository bookSearchRepository;
     private final BookMapper bookMapper;
     private final RedisDao redisDao;
+    private final BookSearchService bookSearchService;
 
     public List<BookSearchRes> findBookByTitle(String title) {
         List<BookDocument> books = bookSearchRepository.findByTitleContaining(title);
@@ -55,7 +56,11 @@ public BookRes findBookById(Long userId, Long bookId) {
         String values = (redisDao.getValues(redisKey) == null) ? redisDao.setValues(redisKey,"0") : redisDao.getValues(redisKey);
         int likes = Integer.parseInt(values);
         boolean likeStatus = !redisDao.getValuesList(redisUserKey).contains(redisKey.substring(1)) ? false : true;
-        return bookMapper.toDto(book, likes, likeStatus);
+
+        // 네이버 책 검색 API 통해 description 가져오기
+        String description = bookSearchService.getBookDescriptionByTitle(book.getTitle());
+
+        return bookMapper.toDto(book, likes, likeStatus, description);
     }
     // 책 판별용
     public Book findById(Long id) {

src/main/java/com/techeer/checkIt/global/config/SecurityConfig.java

@@ -33,8 +33,8 @@ public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Excepti
 
         http.csrf().disable().cors().and()
             .exceptionHandling()
-            .authenticationEntryPoint(jwtAuthenticationEntryPoint)  // 403 (권한이 없는 사용자)
-            .accessDeniedHandler(jwtAccessDeniedHandler)            // 401 (인증되지 않은 사용자)
+            .authenticationEntryPoint(jwtAuthenticationEntryPoint)  // 401 (인증되지 않은 사용자)
+            .accessDeniedHandler(jwtAccessDeniedHandler)            // 403 (권한이 없는 사용자)
             .and()
             .httpBasic().disable()
             .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)     // Security는 기본적으로 세션 사용하지만, jwt 사용할 것이기 때문에 STATELESS 로 설정