课程管理

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

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+package xyz.playedu.api.service;
+
+import xyz.playedu.api.domain.CategoryCourse;
+import com.baomidou.mybatisplus.extension.service.IService;
+
+import java.util.List;
+
+/**
+ * @author tengteng
+ * @description 针对表【category_course】的数据库操作Service
+ * @createDate 2023-02-24 14:48:26
+ */
+public interface CategoryCourseService extends IService<CategoryCourse> {
+    List<Integer> getCourseIdsByCategoryIds(Integer[] categoryIds);
+
+    List<Integer> getDepIdsByCourseId(Integer id);
+
+    void removeByCourseId(Integer courseId);
+}

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

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+package xyz.playedu.api.service;
+
+import xyz.playedu.api.domain.CourseDepartment;
+import com.baomidou.mybatisplus.extension.service.IService;
+
+import java.util.List;
+
+/**
+ * @author tengteng
+ * @description 针对表【course_department】的数据库操作Service
+ * @createDate 2023-02-24 14:53:52
+ */
+public interface CourseDepartmentService extends IService<CourseDepartment> {
+
+    List<Integer> getCourseIdsByDepIds(Integer[] depIds);
+
+    List<Integer> getDepIdsByCourseId(Integer courseId);
+
+    void removeByCourseId(Integer courseId);
+}

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

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+package xyz.playedu.api.service;
+
+import xyz.playedu.api.domain.Course;
+import com.baomidou.mybatisplus.extension.service.IService;
+import xyz.playedu.api.types.paginate.CoursePaginateFiler;
+import xyz.playedu.api.types.paginate.PaginationResult;
+
+/**
+* @author tengteng
+* @description 针对表【courses】的数据库操作Service
+* @createDate 2023-02-24 14:14:01
+*/
+public interface CourseService extends IService<Course> {
+
+    PaginationResult<Course> paginate(int page, int size, CoursePaginateFiler filter);
+
+}

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

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+package xyz.playedu.api.service.impl;
+
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import xyz.playedu.api.domain.CategoryCourse;
+import xyz.playedu.api.service.CategoryCourseService;
+import xyz.playedu.api.mapper.CategoryCourseMapper;
+import org.springframework.stereotype.Service;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author tengteng
+ * @description 针对表【category_course】的数据库操作Service实现
+ * @createDate 2023-02-24 14:48:26
+ */
+@Service
+public class CategoryCourseServiceImpl extends ServiceImpl<CategoryCourseMapper, CategoryCourse>
+        implements CategoryCourseService {
+    @Override
+    public List<Integer> getCourseIdsByCategoryIds(Integer[] categoryIds) {
+        List<Integer> ids = new ArrayList<>();
+        List<CategoryCourse> categoryCourses = list(query().getWrapper().in("category_id", categoryIds));
+        if (categoryCourses.size() == 0) {
+            return ids;
+        }
+        for (CategoryCourse categoryCourse : categoryCourses) {
+            ids.add(categoryCourse.getCourseId());
+        }
+        return ids;
+    }
+
+    @Override
+    public List<Integer> getDepIdsByCourseId(Integer id) {
+        List<Integer> ids = new ArrayList<>();
+        List<CategoryCourse> categoryCourses = list(query().getWrapper().eq("course_id", id));
+        if (categoryCourses.size() == 0) {
+            return ids;
+        }
+        for (CategoryCourse categoryCourse : categoryCourses) {
+            ids.add(categoryCourse.getCategoryId());
+        }
+        return ids;
+    }
+
+    @Override
+    public void removeByCourseId(Integer courseId) {
+        remove(query().getWrapper().eq("course_id", courseId));
+    }
+}
+
+
+
+

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

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+package xyz.playedu.api.service.impl;
+
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import xyz.playedu.api.domain.CourseDepartment;
+import xyz.playedu.api.service.CourseDepartmentService;
+import xyz.playedu.api.mapper.CourseDepartmentMapper;
+import org.springframework.stereotype.Service;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author tengteng
+ * @description 针对表【course_department】的数据库操作Service实现
+ * @createDate 2023-02-24 14:53:52
+ */
+@Service
+public class CourseDepartmentServiceImpl extends ServiceImpl<CourseDepartmentMapper, CourseDepartment>
+        implements CourseDepartmentService {
+    @Override
+    public List<Integer> getCourseIdsByDepIds(Integer[] depIds) {
+        List<Integer> ids = new ArrayList<>();
+        List<CourseDepartment> courseDepartments = list(query().getWrapper().in("dep_id", depIds));
+        if (courseDepartments.size() == 0) {
+            return ids;
+        }
+        for (CourseDepartment courseDepartment : courseDepartments) {
+            ids.add(courseDepartment.getCourseId());
+        }
+        return ids;
+    }
+
+    @Override
+    public List<Integer> getDepIdsByCourseId(Integer courseId) {
+        List<Integer> ids = new ArrayList<>();
+        List<CourseDepartment> courseDepartments = list(query().getWrapper().eq("course_id", courseId));
+        if (courseDepartments.size() == 0) {
+            return ids;
+        }
+        for (CourseDepartment courseDepartment : courseDepartments) {
+            ids.add(courseDepartment.getDepId());
+        }
+        return ids;
+    }
+
+    @Override
+    public void removeByCourseId(Integer courseId) {
+        remove(query().getWrapper().eq("course_id", courseId));
+    }
+}
+
+
+
+

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

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+package xyz.playedu.api.service.impl;
+
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.baomidou.mybatisplus.core.metadata.IPage;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import org.springframework.beans.factory.annotation.Autowired;
+import xyz.playedu.api.domain.Course;
+import xyz.playedu.api.service.CategoryCourseService;
+import xyz.playedu.api.service.CourseDepartmentService;
+import xyz.playedu.api.service.CourseService;
+import xyz.playedu.api.mapper.CourseMapper;
+import org.springframework.stereotype.Service;
+import xyz.playedu.api.types.paginate.CoursePaginateFiler;
+import xyz.playedu.api.types.paginate.PaginationResult;
+import xyz.playedu.api.util.HelperUtil;
+
+import java.util.List;
+
+/**
+ * @author tengteng
+ * @description 针对表【courses】的数据库操作Service实现
+ * @createDate 2023-02-24 14:14:01
+ */
+@Service
+public class CourseServiceImpl extends ServiceImpl<CourseMapper, Course> implements CourseService {
+
+    @Autowired
+    private CourseDepartmentService courseDepartmentService;
+
+    @Autowired
+    private CategoryCourseService categoryCourseService;
+
+    @Override
+    public PaginationResult<Course> paginate(int page, int size, CoursePaginateFiler filter) {
+        QueryWrapper<Course> wrapper = query().getWrapper().eq("1", "1");
+
+        if (filter.getTitle() != null && filter.getTitle().length() > 0) {
+            wrapper.like("title", "%" + filter.getTitle() + "%");
+        }
+        if (filter.getDepIds() != null && filter.getDepIds().length > 0) {
+            List<Integer> courseIds = courseDepartmentService.getCourseIdsByDepIds(filter.getDepIds());
+            if (courseIds.size() == 0) {
+                wrapper.in("id", HelperUtil.zeroIntegerList());
+            } else {
+                wrapper.in("id", courseIds);
+            }
+        }
+        if (filter.getCategoryIds() != null && filter.getCategoryIds().length > 0) {
+            List<Integer> courseIds = categoryCourseService.getCourseIdsByCategoryIds(filter.getCategoryIds());
+            if (courseIds.size() == 0) {
+                wrapper.in("id", HelperUtil.zeroIntegerList());
+            } else {
+                wrapper.in("id", courseIds);
+            }
+        }
+
+        if (filter.getSortAlgo().equals("desc")) {
+            wrapper.orderByDesc(filter.getSortField());
+        } else {
+            wrapper.orderByAsc(filter.getSortField());
+        }
+
+        IPage<Course> pageObj = new Page<>(page, size);
+        pageObj = page(pageObj, wrapper);
+
+        PaginationResult<Course> pageResult = new PaginationResult<>();
+        pageResult.setData(pageObj.getRecords());
+        pageResult.setTotal(pageObj.getTotal());
+
+        return pageResult;
+    }
+}
+
+
+
+