feat: 多班级版 v2.0 - Go后端重写 + 43轮代码审查
- 后端从 Python FastAPI 重写为 Go Gin（端口 56789） - 多班级完全隔离 - 超级管理员独立登录 - 课代表作业管理、排行榜分项排行 - 角色加减分上下限可配置 - 家长改密功能（可开关） - 周度/月度重置功能 - MySQL 5.7 兼容 - 43轮代码审查+全部修复 - Apache 2.0 许可证
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224
backend-go/internal/service/class_service.go
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224
backend-go/internal/service/class_service.go
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// ===========================================
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// 多班级版班级管理系统 - Go 后端
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//
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// 开发者: Canglan
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// 联系方式: admin@sea-studio.top
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// 版权归属: Sea Network Technology Studio
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// 许可证: Apache License 2.0
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//
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// 版权所有 © Sea Network Technology Studio
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// ===========================================
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package service
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import (
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"context"
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"fmt"
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"hz-gitea.sea-studio.top/canglan/SharedClassManager/internal/config"
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"hz-gitea.sea-studio.top/canglan/SharedClassManager/internal/model"
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"hz-gitea.sea-studio.top/canglan/SharedClassManager/internal/repository"
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appJwt "hz-gitea.sea-studio.top/canglan/SharedClassManager/pkg/jwt"
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"hz-gitea.sea-studio.top/canglan/SharedClassManager/pkg/database"
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)
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// ClassService 班级服务
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type ClassService struct {
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classRepo *repository.ClassRepo
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userRepo *repository.UserRepo
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adminRoleRepo *repository.AdminRoleRepo
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}
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// NewClassService 创建班级服务
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func NewClassService(
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classRepo *repository.ClassRepo,
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userRepo *repository.UserRepo,
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adminRoleRepo *repository.AdminRoleRepo,
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) *ClassService {
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return &ClassService{
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classRepo: classRepo,
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userRepo: userRepo,
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adminRoleRepo: adminRoleRepo,
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}
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}
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// ListClasses 获取班级列表
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func (s *ClassService) ListClasses(includeDisabled bool) (map[string]interface{}, error) {
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classes, err := s.classRepo.GetAll(includeDisabled)
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if err != nil {
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return nil, err
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}
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for i := range classes {
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count, _ := s.classRepo.GetStudentCount(classes[i].ClassID)
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classes[i].StudentCount = count
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}
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return map[string]interface{}{
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"classes": classes,
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"total": len(classes),
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}, nil
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}
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// GetClassDetail 获取班级详情
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func (s *ClassService) GetClassDetail(classID int) (map[string]interface{}, error) {
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cls, err := s.classRepo.GetByID(classID)
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if err != nil {
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return nil, err
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}
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cls.StudentCount, _ = s.classRepo.GetStudentCount(classID)
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return map[string]interface{}{"class": cls}, nil
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}
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// CreateClass 创建班级
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func (s *ClassService) CreateClass(className string, grade, description *string) (map[string]interface{}, error) {
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existing, _ := s.classRepo.GetByName(className)
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if existing != nil {
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return map[string]interface{}{"success": false, "message": "班级名称已存在"}, nil
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}
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cls := &model.Class{
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ClassName: className,
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Grade: grade,
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Description: description,
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Status: 1,
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}
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classID, err := s.classRepo.Create(cls)
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if err != nil {
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return nil, err
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}
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return map[string]interface{}{
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"success": true,
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"class_id": classID,
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"message": "班级创建成功",
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}, nil
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}
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// UpdateClass 更新班级
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func (s *ClassService) UpdateClass(classID int, className, grade, description *string, status *int8) error {
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existing, err := s.classRepo.GetByID(classID)
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if err != nil {
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return fmt.Errorf("班级不存在")
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}
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updates := make(map[string]interface{})
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if className != nil && *className != existing.ClassName {
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nameExists, _ := s.classRepo.GetByName(*className)
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if nameExists != nil {
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return fmt.Errorf("班级名称已存在")
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}
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updates["class_name"] = *className
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}
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if grade != nil {
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updates["grade"] = *grade
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}
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if description != nil {
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updates["description"] = *description
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}
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if status != nil {
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updates["status"] = *status
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}
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return s.classRepo.Update(classID, updates)
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}
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// DeleteClass 删除班级
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func (s *ClassService) DeleteClass(classID int) error {
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hasStudents, _ := s.classRepo.HasActiveStudents(classID)
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if hasStudents {
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return fmt.Errorf("该班级下还有学生，无法删除")
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}
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return s.classRepo.Delete(classID)
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}
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// SwitchClass 切换班级上下文（超级管理员）
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func (s *ClassService) SwitchClass(userID int, classID int) (map[string]interface{}, error) {
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cfg := config.AppConfig
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cls, err := s.classRepo.GetByID(classID)
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if err != nil {
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return nil, fmt.Errorf("班级不存在")
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}
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user, err := s.userRepo.GetByUserID(userID)
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if err != nil {
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return nil, fmt.Errorf("用户不存在")
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}
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// 查询目标班级中该用户的角色
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var role string
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if user.UserType == "super_admin" {
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role = "系统管理员"
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} else {
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adminRole, _ := s.adminRoleRepo.GetByUserIDAndClass(userID, classID)
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if adminRole != nil {
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role = adminRole.RoleType
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}
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}
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// 生成新 Token，更新 class_id
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token, err := appJwt.CreateToken(
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user.UserID, user.Username, user.UserType,
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user.StudentID, role, user.RealName, &classID,
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user.NeedChangePassword == 1,
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)
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if err != nil {
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return nil, fmt.Errorf("生成令牌失败")
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}
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ctx := context.Background()
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_ = database.SetUserToken(ctx, userID, token, cfg.JWTIdleTimeoutMinutes)
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return map[string]interface{}{
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"token": token,
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"class_id": classID,
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"class_name": cls.ClassName,
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}, nil
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}
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// GetSettings 获取班级设置
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func (s *ClassService) GetSettings(classID int) (map[string]interface{}, error) {
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settings, err := s.classRepo.GetSettings(classID)
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if err != nil {
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return nil, err
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}
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result := make(map[string]string)
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for _, setting := range settings {
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result[setting.SettingKey] = setting.SettingValue
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}
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return map[string]interface{}{"settings": result}, nil
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}
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// SaveSetting 保存班级设置
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func (s *ClassService) SaveSetting(classID int, key, value string) error {
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return s.classRepo.SaveSetting(classID, key, value)
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}
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// GetFeatures 获取班级功能开关
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func (s *ClassService) GetFeatures(classID int) (map[string]interface{}, error) {
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features, err := s.classRepo.GetFeatures(classID)
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if err != nil {
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return nil, err
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}
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result := make(map[string]int8)
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for _, f := range features {
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result[f.FeatureKey] = f.Enabled
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}
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return map[string]interface{}{"features": result}, nil
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}
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// SaveFeature 保存班级功能开关
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func (s *ClassService) SaveFeature(classID int, featureKey string, enabled int8) error {
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return s.classRepo.SaveFeature(classID, featureKey, enabled)
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}
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// IsFeatureEnabled 检查功能开关是否启用
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func (s *ClassService) IsFeatureEnabled(classID int, featureKey string) bool {
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feature, err := s.classRepo.GetFeature(classID, featureKey)
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if err != nil || feature == nil {
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return true // 默认启用
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}
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return feature.Enabled == 1
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}
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