课程管理

src/main/java/xyz/playedu/api/controller/backend/CourseChapterController.java

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+package xyz.playedu.api.controller.backend;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.*;
+import xyz.playedu.api.PlayEduBackendThreadLocal;
+import xyz.playedu.api.domain.CourseChapter;
+import xyz.playedu.api.event.CourseChapterDestroyEvent;
+import xyz.playedu.api.exception.NotFoundException;
+import xyz.playedu.api.request.backend.CourseChapterRequest;
+import xyz.playedu.api.service.CourseChapterService;
+import xyz.playedu.api.types.JsonResponse;
+
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+
+/**
+ * @Author 杭州白书科技有限公司
+ * @create 2023/2/26 17:28
+ */
+@RestController
+@RequestMapping("/backend/v1/course/{courseId}/chapter")
+public class CourseChapterController {
+
+    @Autowired
+    private CourseChapterService chapterService;
+
+    @Autowired
+    private ApplicationContext ctx;
+
+    @GetMapping("/index")
+    public JsonResponse index(@PathVariable(name = "courseId") Integer courseId) {
+        List<CourseChapter> chapters = chapterService.getChaptersByCourseId(courseId);
+        return JsonResponse.data(chapters);
+    }
+
+    @GetMapping("/create")
+    public JsonResponse create(@PathVariable(name = "courseId") Integer courseId) {
+        List<CourseChapter> chapters = chapterService.getChaptersByCourseId(courseId);
+        HashMap<String, Object> data = new HashMap<>();
+        data.put("chapters", chapters);
+        return JsonResponse.data(data);
+    }
+
+    @PostMapping("/create")
+    public JsonResponse store(@PathVariable(name = "courseId") Integer courseId, @RequestBody @Validated CourseChapterRequest req) {
+        chapterService.create(courseId, req.getName(), req.getSort());
+        return JsonResponse.success();
+    }
+
+    @GetMapping("/{id}")
+    public JsonResponse edit(@PathVariable(name = "courseId") Integer courseId, @PathVariable(name = "id") Integer id) throws NotFoundException {
+        CourseChapter chapter = chapterService.findOrFail(id, courseId);
+        return JsonResponse.data(chapter);
+    }
+
+    @PutMapping("/{id}")
+    public JsonResponse update(@PathVariable(name = "courseId") Integer courseId, @PathVariable(name = "id") Integer id, @RequestBody @Validated CourseChapterRequest req) throws NotFoundException {
+        CourseChapter chapter = chapterService.findOrFail(id, courseId);
+        chapterService.update(chapter, req.getName(), req.getSort());
+        return JsonResponse.data(chapter);
+    }
+
+    @DeleteMapping("/{id}")
+    public JsonResponse destroy(@PathVariable(name = "courseId") Integer courseId, @PathVariable(name = "id") Integer id) throws NotFoundException {
+        CourseChapter chapter = chapterService.findOrFail(id, courseId);
+        chapterService.removeById(chapter.getId());
+        ctx.publishEvent(new CourseChapterDestroyEvent(this, PlayEduBackendThreadLocal.getAdminUserID(), chapter.getCourseId(), new Date()));
+        return JsonResponse.success();
+    }
+}

src/main/java/xyz/playedu/api/domain/CourseChapter.java

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+package xyz.playedu.api.domain;
+
+import com.baomidou.mybatisplus.annotation.IdType;
+import com.baomidou.mybatisplus.annotation.TableField;
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableName;
+import java.io.Serializable;
+import java.util.Date;
+import lombok.Data;
+
+/**
+ * 
+ * @TableName course_chapters
+ */
+@TableName(value ="course_chapters")
+@Data
+public class CourseChapter implements Serializable {
+    /**
+     * 
+     */
+    @TableId(type = IdType.AUTO)
+    private Integer id;
+
+    /**
+     * 课程ID
+     */
+    private Integer courseId;
+
+    /**
+     * 章节名
+     */
+    private String name;
+
+    /**
+     * 升序
+     */
+    private Integer sort;
+
+    /**
+     * 
+     */
+    private Date createdAt;
+
+    /**
+     * 
+     */
+    private Date updatedAt;
+
+    @TableField(exist = false)
+    private static final long serialVersionUID = 1L;
+
+    @Override
+    public boolean equals(Object that) {
+        if (this == that) {
+            return true;
+        }
+        if (that == null) {
+            return false;
+        }
+        if (getClass() != that.getClass()) {
+            return false;
+        }
+        CourseChapter other = (CourseChapter) that;
+        return (this.getId() == null ? other.getId() == null : this.getId().equals(other.getId()))
+            && (this.getCourseId() == null ? other.getCourseId() == null : this.getCourseId().equals(other.getCourseId()))
+            && (this.getName() == null ? other.getName() == null : this.getName().equals(other.getName()))
+            && (this.getSort() == null ? other.getSort() == null : this.getSort().equals(other.getSort()))
+            && (this.getCreatedAt() == null ? other.getCreatedAt() == null : this.getCreatedAt().equals(other.getCreatedAt()))
+            && (this.getUpdatedAt() == null ? other.getUpdatedAt() == null : this.getUpdatedAt().equals(other.getUpdatedAt()));
+    }
+
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((getId() == null) ? 0 : getId().hashCode());
+        result = prime * result + ((getCourseId() == null) ? 0 : getCourseId().hashCode());
+        result = prime * result + ((getName() == null) ? 0 : getName().hashCode());
+        result = prime * result + ((getSort() == null) ? 0 : getSort().hashCode());
+        result = prime * result + ((getCreatedAt() == null) ? 0 : getCreatedAt().hashCode());
+        result = prime * result + ((getUpdatedAt() == null) ? 0 : getUpdatedAt().hashCode());
+        return result;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append(getClass().getSimpleName());
+        sb.append(" [");
+        sb.append("Hash = ").append(hashCode());
+        sb.append(", id=").append(id);
+        sb.append(", courseId=").append(courseId);
+        sb.append(", name=").append(name);
+        sb.append(", sort=").append(sort);
+        sb.append(", createdAt=").append(createdAt);
+        sb.append(", updatedAt=").append(updatedAt);
+        sb.append(", serialVersionUID=").append(serialVersionUID);
+        sb.append("]");
+        return sb.toString();
+    }
+}

src/main/java/xyz/playedu/api/event/CourseChapterDestroyEvent.java

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+package xyz.playedu.api.event;
+
+import lombok.Getter;
+import lombok.Setter;
+import org.springframework.context.ApplicationEvent;
+
+import java.util.Date;
+
+/**
+ * @Author 杭州白书科技有限公司
+ * @create 2023/2/26 17:42
+ */
+@Getter
+@Setter
+public class CourseChapterDestroyEvent extends ApplicationEvent {
+    private Integer adminId;
+    private Integer chapterId;
+    private Date date;
+
+    public CourseChapterDestroyEvent(Object source, Integer adminId, Integer chapterId, Date date) {
+        super(source);
+        this.adminId = adminId;
+        this.chapterId = chapterId;
+        this.date = date;
+    }
+}

src/main/java/xyz/playedu/api/mapper/CourseChapterMapper.java

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+package xyz.playedu.api.mapper;
+
+import org.apache.ibatis.annotations.Mapper;
+import xyz.playedu.api.domain.CourseChapter;
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+
+/**
+* @author tengteng
+* @description 针对表【course_chapters】的数据库操作Mapper
+* @createDate 2023-02-26 17:34:01
+* @Entity xyz.playedu.api.domain.CourseChapter
+*/
+@Mapper
+public interface CourseChapterMapper extends BaseMapper<CourseChapter> {
+
+}
+
+
+
+

src/main/java/xyz/playedu/api/request/backend/CourseChapterRequest.java

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+package xyz.playedu.api.request.backend;
+
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+import lombok.Data;
+import org.hibernate.validator.constraints.Length;
+
+/**
+ * @Author 杭州白书科技有限公司
+ * @create 2023/2/26 17:36
+ */
+@Data
+public class CourseChapterRequest {
+
+    @NotBlank(message = "请输入章节名")
+    @NotNull(message = "name参数不存在")
+    @Length(min = 1, max = 64, message = "章节名长度在1-64个字符之间")
+    private String name;
+
+    @NotNull(message = "sort参数不存在")
+    private Integer sort;
+
+}

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;
+    }
+}
+
+
+
+

src/main/resources/mapper/CourseChapterMapper.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="xyz.playedu.api.mapper.CourseChapterMapper">
+
+    <resultMap id="BaseResultMap" type="xyz.playedu.api.domain.CourseChapter">
+            <id property="id" column="id" jdbcType="INTEGER"/>
+            <result property="courseId" column="course_id" jdbcType="INTEGER"/>
+            <result property="name" column="name" jdbcType="VARCHAR"/>
+            <result property="sort" column="sort" jdbcType="INTEGER"/>
+            <result property="createdAt" column="created_at" jdbcType="TIMESTAMP"/>
+            <result property="updatedAt" column="updated_at" jdbcType="TIMESTAMP"/>
+    </resultMap>
+
+    <sql id="Base_Column_List">
+        id,course_id,name,
+        sort,created_at,updated_at
+    </sql>
+</mapper>