feat: 인기 있는 책 조회 API entity, mapper 추가

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

@@ -0,0 +1,22 @@
+package com.techeer.checkIt.domain.book.dto.Response;
+
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+
+@Getter
+@Builder
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+@JsonNaming(PropertyNamingStrategies.SnakeCaseStrategy.class)
+public class BookSearchLikeRes {
+  private String title;
+  private String author;
+  private String publisher;
+  private String coverImageUrl;
+  private int pages;
+  private String category;
+  private int like;
+}

src/main/java/com/techeer/checkIt/domain/book/entity/Book.java

@@ -37,6 +37,8 @@ public class Book extends BaseEntity {
     private String category;
     @OneToMany(mappedBy = "book")
     private List<Reading> readingList = new ArrayList<>();
+    @Column(name = "like_count")
+    private Integer likeCount = 0;
     @Builder
     public Book(String title, String author, String publisher, String coverImageUrl, int pages, int height, int width, int thickness, String category) {
         this.title = title;
@@ -49,4 +51,16 @@ public Book(String title, String author, String publisher, String coverImageUrl,
         this.thickness = thickness;
         this.category = category;
     }
+
+    @PostLoad
+    @PrePersist
+    private void initializeDefaults() {
+        if (likeCount == null) {
+            likeCount = 0; // 기본값을 0으로 설정
+        }
+    }
+    public void updateLike(int like) {
+        this.likeCount = like;
+    }
+    public void setLikeCount(Integer likeCount) { this.likeCount = likeCount; }
 }

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

@@ -1,6 +1,7 @@
 package com.techeer.checkIt.domain.book.mapper;
 
 import com.techeer.checkIt.domain.book.dto.Response.BookRes;
+import com.techeer.checkIt.domain.book.dto.Response.BookSearchLikeRes;
 import com.techeer.checkIt.domain.book.dto.Response.BookSearchRes;
 import com.techeer.checkIt.domain.book.entity.Book;
 import com.techeer.checkIt.domain.book.entity.BookDocument;
@@ -37,6 +38,17 @@ public BookSearchRes toBookSearchDto(BookDocument book) {
                 .category(book.getCategory())
                 .build();
     }
+    public BookSearchLikeRes toBookSearchLikeDto(Book book) {
+        return BookSearchLikeRes.builder()
+            .title(book.getTitle())
+            .author(book.getAuthor())
+            .publisher(book.getPublisher())
+            .coverImageUrl(book.getCoverImageUrl())
+            .pages(book.getPages())
+            .category(book.getCategory())
+            .like(book.getLikeCount())
+            .build();
+    }
     public List<BookSearchRes> toSearchDtoList(List<BookDocument> books){
         return books.stream()
                 .map(this::toBookSearchDto)
@@ -47,4 +59,10 @@ public Page<BookSearchRes> toPageDtoList(Page<BookDocument> books) {
                 .map(this::toBookSearchDto)
                 .collect(Collectors.toList()));
     }
+
+    public Page<BookSearchLikeRes> toPageDtoList2(Page<Book> books) {
+        return new PageImpl<>(books.stream()
+            .map(this::toBookSearchLikeDto)
+            .collect(Collectors.toList()));
+    }
 }