课程管理

src/main/java/xyz/playedu/api/service/CourseChapterService.java

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+package xyz.playedu.api.service;
+
+import xyz.playedu.api.domain.CourseChapter;
+import com.baomidou.mybatisplus.extension.service.IService;
+import xyz.playedu.api.exception.NotFoundException;
+
+import java.util.List;
+
+/**
+ * @author tengteng
+ * @description 针对表【course_chapters】的数据库操作Service
+ * @createDate 2023-02-26 17:30:19
+ */
+public interface CourseChapterService extends IService<CourseChapter> {
+
+    List<CourseChapter> getChaptersByCourseId(Integer courseId);
+
+    void create(Integer courseId, String name, Integer sort);
+
+    void update(CourseChapter chapter, String name, Integer sort);
+
+    CourseChapter findOrFail(Integer id) throws NotFoundException;
+
+    CourseChapter findOrFail(Integer id, Integer courseId) throws NotFoundException;
+
+}

src/main/java/xyz/playedu/api/service/impl/CourseChapterServiceImpl.java

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+package xyz.playedu.api.service.impl;
+
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import xyz.playedu.api.domain.CourseChapter;
+import xyz.playedu.api.exception.NotFoundException;
+import xyz.playedu.api.service.CourseChapterService;
+import xyz.playedu.api.mapper.CourseChapterMapper;
+import org.springframework.stereotype.Service;
+
+import java.util.Date;
+import java.util.List;
+
+/**
+ * @author tengteng
+ * @description 针对表【course_chapters】的数据库操作Service实现
+ * @createDate 2023-02-26 17:30:18
+ */
+@Service
+public class CourseChapterServiceImpl extends ServiceImpl<CourseChapterMapper, CourseChapter>
+        implements CourseChapterService {
+
+    @Override
+    public void create(Integer courseId, String name, Integer sort) {
+        CourseChapter chapter = new CourseChapter();
+        chapter.setCourseId(courseId);
+        chapter.setName(name);
+        chapter.setSort(sort);
+        chapter.setCreatedAt(new Date());
+        chapter.setUpdatedAt(new Date());
+        save(chapter);
+    }
+
+    @Override
+    public void update(CourseChapter chapter, String name, Integer sort) {
+        CourseChapter newChapter = new CourseChapter();
+        newChapter.setId(chapter.getId());
+        newChapter.setName(name);
+        newChapter.setSort(sort);
+        updateById(newChapter);
+    }
+
+    @Override
+    public CourseChapter findOrFail(Integer id) throws NotFoundException {
+        CourseChapter chapter = getOne(query().getWrapper().eq("id", id));
+        if (chapter == null) {
+            throw new NotFoundException("章节不存在");
+        }
+        return chapter;
+    }
+
+    @Override
+    public List<CourseChapter> getChaptersByCourseId(Integer courseId) {
+        return list(query().getWrapper().eq("course_id", courseId).orderByAsc("sort"));
+    }
+
+    @Override
+    public CourseChapter findOrFail(Integer id, Integer courseId) throws NotFoundException {
+        CourseChapter chapter = getOne(query().getWrapper().eq("id", id).eq("course_id", courseId));
+        if (chapter == null) {
+            throw new NotFoundException("章节不存在");
+        }
+        return chapter;
+    }
+}
+
+
+
+