feat: 小说章节删除接口

src/main/java/io/github/xxyopen/novel/controller/author/AuthorController.java

@@ -20,12 +20,7 @@ import io.swagger.v3.oas.annotations.tags.Tag;
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
 import org.springdoc.core.annotations.ParameterObject;
-import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.*;
-import org.springframework.web.bind.annotation.PathVariable;
-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.RestController;
 
 /**
  * 作家后台-作家模块 API 控制器
@@ -93,6 +88,16 @@ public class AuthorController {
         return bookService.saveBookChapter(dto);
     }
 
+    /**
+     * 小说章节删除接口
+     */
+    @Operation(summary = "小说章节删除接口")
+    @DeleteMapping("book/chapter/{chapterId}")
+    public RestResp<Void> deleteBookChapter(
+        @Parameter(description = "章节ID") @PathVariable("chapterId") Long chapterId) {
+        return bookService.deleteBookChapter(chapterId);
+    }
+
     /**
      * 小说章节发布列表查询接口
      */

src/main/java/io/github/xxyopen/novel/manager/cache/BookChapterCacheManager.java

@@ -5,6 +5,7 @@ import io.github.xxyopen.novel.dao.entity.BookChapter;
 import io.github.xxyopen.novel.dao.mapper.BookChapterMapper;
 import io.github.xxyopen.novel.dto.resp.BookChapterRespDto;
 import lombok.RequiredArgsConstructor;
+import org.springframework.cache.annotation.CacheEvict;
 import org.springframework.cache.annotation.Cacheable;
 import org.springframework.stereotype.Component;
 
@@ -37,5 +38,10 @@ public class BookChapterCacheManager {
             .build();
     }
 
+    @CacheEvict(cacheManager = CacheConsts.CAFFEINE_CACHE_MANAGER,
+        value = CacheConsts.BOOK_CHAPTER_CACHE_NAME)
+    public void evictBookChapterCache(Long chapterId) {
+        // 调用此方法自动清除小说章节信息的缓存
+    }
 
 }

src/main/java/io/github/xxyopen/novel/manager/cache/BookContentCacheManager.java

@@ -6,6 +6,7 @@ import io.github.xxyopen.novel.core.constant.DatabaseConsts;
 import io.github.xxyopen.novel.dao.entity.BookContent;
 import io.github.xxyopen.novel.dao.mapper.BookContentMapper;
 import lombok.RequiredArgsConstructor;
+import org.springframework.cache.annotation.CacheEvict;
 import org.springframework.cache.annotation.Cacheable;
 import org.springframework.stereotype.Component;
 
@@ -34,5 +35,11 @@ public class BookContentCacheManager {
         return bookContent.getContent();
     }
 
+    @CacheEvict(cacheManager = CacheConsts.REDIS_CACHE_MANAGER,
+        value = CacheConsts.BOOK_CONTENT_CACHE_NAME)
+    public void evictBookContentCache(Long chapterId) {
+        // 调用此方法自动清除小说内容信息的缓存
+    }
+
 
 }

src/main/java/io/github/xxyopen/novel/manager/cache/BookInfoCacheManager.java

@@ -8,13 +8,14 @@ import io.github.xxyopen.novel.dao.entity.BookInfo;
 import io.github.xxyopen.novel.dao.mapper.BookChapterMapper;
 import io.github.xxyopen.novel.dao.mapper.BookInfoMapper;
 import io.github.xxyopen.novel.dto.resp.BookInfoRespDto;
-import java.util.List;
 import lombok.RequiredArgsConstructor;
 import org.springframework.cache.annotation.CacheEvict;
 import org.springframework.cache.annotation.CachePut;
 import org.springframework.cache.annotation.Cacheable;
 import org.springframework.stereotype.Component;
 
+import java.util.List;
+
 /**
  * 小说信息 缓存管理类
  *
@@ -74,7 +75,7 @@ public class BookInfoCacheManager {
 
     @CacheEvict(cacheManager = CacheConsts.CAFFEINE_CACHE_MANAGER,
         value = CacheConsts.BOOK_INFO_CACHE_NAME)
-    public void evictBookInfoCache(Long ignoredId) {
+    public void evictBookInfoCache(Long bookId) {
         // 调用此方法自动清除小说信息的缓存
     }
 

src/main/java/io/github/xxyopen/novel/service/BookService.java

@@ -189,4 +189,12 @@ public interface BookService {
      */
     RestResp<PageRespDto<UserCommentRespDto>> listComments(Long userId, PageReqDto pageReqDto);
 
+    /**
+     * 小说章节删除
+     *
+     * @param chapterId 章节ID
+     * @return void
+     */
+    RestResp<Void> deleteBookChapter(Long chapterId);
+
 }

src/main/java/io/github/xxyopen/novel/service/impl/BookServiceImpl.java

@@ -437,6 +437,55 @@ public class BookServiceImpl implements BookService {
             Collections.emptyList()));
     }
 
+    @Transactional(rollbackFor = Exception.class)
+    @Override
+    public RestResp<Void> deleteBookChapter(Long chapterId) {
+        // 1.查询章节信息
+        BookChapterRespDto chapter = bookChapterCacheManager.getChapter(chapterId);
+        // 2.查询小说信息
+        BookInfoRespDto bookInfo = bookInfoCacheManager.getBookInfo(chapter.getBookId());
+        // 3.删除章节信息
+        bookChapterMapper.deleteById(chapterId);
+        // 4.删除章节内容
+        QueryWrapper<BookContent> bookContentQueryWrapper = new QueryWrapper<>();
+        bookContentQueryWrapper.eq(DatabaseConsts.BookContentTable.COLUMN_CHAPTER_ID, chapterId);
+        bookContentMapper.delete(bookContentQueryWrapper);
+        // 5.更新小说信息
+        BookInfo newBookInfo = new BookInfo();
+        newBookInfo.setId(chapter.getBookId());
+        newBookInfo.setUpdateTime(LocalDateTime.now());
+        newBookInfo.setWordCount(bookInfo.getWordCount() - chapter.getChapterWordCount());
+        if (Objects.equals(bookInfo.getLastChapterId(), chapterId)) {
+            // 设置最新章节信息
+            QueryWrapper<BookChapter> bookChapterQueryWrapper = new QueryWrapper<>();
+            bookChapterQueryWrapper.eq(DatabaseConsts.BookChapterTable.COLUMN_BOOK_ID, chapter.getBookId())
+                .orderByDesc(DatabaseConsts.BookChapterTable.COLUMN_CHAPTER_NUM)
+                .last(DatabaseConsts.SqlEnum.LIMIT_1.getSql());
+            BookChapter bookChapter = bookChapterMapper.selectOne(bookChapterQueryWrapper);
+            Long lastChapterId = 0L;
+            String lastChapterName = "";
+            LocalDateTime lastChapterUpdateTime = null;
+            if (Objects.nonNull(bookChapter)) {
+                lastChapterId = bookChapter.getId();
+                lastChapterName = bookChapter.getChapterName();
+                lastChapterUpdateTime = bookChapter.getUpdateTime();
+            }
+            newBookInfo.setLastChapterId(lastChapterId);
+            newBookInfo.setLastChapterName(lastChapterName);
+            newBookInfo.setLastChapterUpdateTime(lastChapterUpdateTime);
+        }
+        bookInfoMapper.updateById(newBookInfo);
+        // 6.清理章节信息缓存
+        bookChapterCacheManager.evictBookChapterCache(chapterId);
+        // 7.清理章节内容缓存
+        bookContentCacheManager.evictBookContentCache(chapterId);
+        // 8.清理小说信息缓存
+        bookInfoCacheManager.evictBookInfoCache(chapter.getBookId());
+        // 9.发送小说信息更新的 MQ 消息
+        amqpMsgManager.sendBookChangeMsg(chapter.getBookId());
+        return RestResp.ok();
+    }
+
     @Override
     public RestResp<BookContentAboutRespDto> getBookContentAbout(Long chapterId) {
         log.debug("userId:{}", UserHolder.getUserId());