feat: 实现关注系统 + 通知侧边栏分类 TAB + 点赞聚合通知
- 新增关注系统：UserFollow 模型、FollowService（toggle/status/列表隐私控制） - User 新增 FollowersCount/FollowingCount/FollowListPublic/NotifyPrefs 字段 - Space 页面增加四态关注按钮（关注/已关注/回关/已互粉）+ 粉丝/关注数链接 - 新增 /space/:uid/followers 和 /space/:uid/following 列表页 - 新增 NotifyFollow/NotifyLikeAggregated 通知类型 - ReactionService 点赞时写入 daily_like_summary，访问时生成聚合通知 - FollowService 关注时触发 NotifyFollow 通知 - 消息中心侧边栏升级为分类 TAB（全部/系统通知/@艾特/点赞/关注） - NotificationService 新增 ListByCategory 按分类分页查询
This commit is contained in:
213
internal/service/follow_service.go
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213
internal/service/follow_service.go
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package service
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import (
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"fmt"
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"metazone.cc/metalab/internal/common"
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"metazone.cc/metalab/internal/model"
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"gorm.io/gorm"
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)
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// FollowStatus 关注关系状态
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type FollowStatus struct {
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IFollow bool `json:"i_follow"`
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TheyFollow bool `json:"they_follow"`
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}
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// FollowListResult 关注/粉丝列表结果
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type FollowListResult struct {
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Items []model.UserFollow `json:"items"`
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Total int64 `json:"total"`
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Page int `json:"page"`
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TotalPages int `json:"total_pages"`
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ListPublic bool `json:"list_public"`
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Accessible bool `json:"accessible"`
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}
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// followNotifier 关注通知接口（ISP）
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type followNotifier interface {
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NotifyFollow(followerID, followeeID uint)
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}
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// FollowService 关注业务逻辑
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type FollowService struct {
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db *gorm.DB
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repo FollowStore
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notifier followNotifier
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}
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// NewFollowService 构造函数
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func NewFollowService(db *gorm.DB, repo FollowStore) *FollowService {
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return &FollowService{db: db, repo: repo}
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}
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// SetNotifier 注入通知服务
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func (s *FollowService) SetNotifier(n followNotifier) {
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s.notifier = n
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}
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// Toggle 关注/取消关注，返回操作后的关注状态（true=已关注）
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func (s *FollowService) Toggle(followerID, followeeID uint) (bool, error) {
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if followerID == followeeID {
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return false, fmt.Errorf("不能关注自己")
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}
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var isFollowing bool
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err := s.db.Transaction(func(tx *gorm.DB) error {
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txRepo := s.repo.WithTx(tx)
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exists, err := txRepo.Exists(followerID, followeeID)
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if err != nil {
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return fmt.Errorf("查询关注状态失败: %w", err)
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}
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if exists {
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if err := txRepo.Delete(followerID, followeeID); err != nil {
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return fmt.Errorf("取消关注失败: %w", err)
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}
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if err := txRepo.IncrFollowingCount(followerID, -1); err != nil {
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return fmt.Errorf("更新关注数失败: %w", err)
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}
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if err := txRepo.IncrFollowersCount(followeeID, -1); err != nil {
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return fmt.Errorf("更新粉丝数失败: %w", err)
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}
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isFollowing = false
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} else {
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follow := &model.UserFollow{
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FollowerID: followerID,
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FolloweeID: followeeID,
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}
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if err := txRepo.Create(follow); err != nil {
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return fmt.Errorf("关注失败: %w", err)
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}
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if err := txRepo.IncrFollowingCount(followerID, 1); err != nil {
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return fmt.Errorf("更新关注数失败: %w", err)
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}
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if err := txRepo.IncrFollowersCount(followeeID, 1); err != nil {
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return fmt.Errorf("更新粉丝数失败: %w", err)
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}
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isFollowing = true
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}
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return nil
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})
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if err == nil && isFollowing {
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s.sendFollowNotification(followerID, followeeID)
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}
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return isFollowing, err
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}
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// sendFollowNotification 发送关注通知（非关键路径）
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func (s *FollowService) sendFollowNotification(followerID, followeeID uint) {
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if s.notifier != nil && followerID != followeeID {
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s.notifier.NotifyFollow(followerID, followeeID)
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}
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}
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// GetStatus 查询当前用户对目标用户的关注关系
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func (s *FollowService) GetStatus(currentUserID, targetUserID uint) (*FollowStatus, error) {
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if currentUserID == 0 {
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return &FollowStatus{}, nil
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}
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iFollow, err := s.repo.Exists(currentUserID, targetUserID)
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if err != nil {
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return nil, fmt.Errorf("查询我是否关注: %w", err)
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}
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theyFollow, err := s.repo.Exists(targetUserID, currentUserID)
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if err != nil {
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return nil, fmt.Errorf("查询对方是否关注: %w", err)
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}
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return &FollowStatus{
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IFollow: iFollow,
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TheyFollow: theyFollow,
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}, nil
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}
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// ListFollowers 粉丝列表（含隐私控制）
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func (s *FollowService) ListFollowers(userID, currentUserID uint, page, pageSize int) (*FollowListResult, error) {
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listPublic, err := s.repo.GetFollowListPublic(userID)
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if err != nil {
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return nil, fmt.Errorf("查询公开设置: %w", err)
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}
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p := common.Pagination{Page: page, PageSize: pageSize}
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p.DefaultPagination()
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accessible := listPublic || currentUserID == userID
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var items []model.UserFollow
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var total int64
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if accessible {
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items, total, err = s.repo.ListFollowers(userID, p.Offset(), p.PageSize)
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if err != nil {
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return nil, fmt.Errorf("查询粉丝列表: %w", err)
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}
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} else {
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total, err = s.repo.CountFollowers(userID)
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if err != nil {
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return nil, fmt.Errorf("查询粉丝数: %w", err)
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}
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items = []model.UserFollow{}
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}
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if items == nil {
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items = []model.UserFollow{}
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}
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return &FollowListResult{
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Items: items,
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Total: total,
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Page: p.Page,
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TotalPages: common.PageCount(total, p.PageSize),
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ListPublic: listPublic,
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Accessible: accessible,
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}, nil
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}
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// ListFollowing 关注列表（含隐私控制）
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func (s *FollowService) ListFollowing(userID, currentUserID uint, page, pageSize int) (*FollowListResult, error) {
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listPublic, err := s.repo.GetFollowListPublic(userID)
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if err != nil {
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return nil, fmt.Errorf("查询公开设置: %w", err)
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}
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p := common.Pagination{Page: page, PageSize: pageSize}
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p.DefaultPagination()
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accessible := listPublic || currentUserID == userID
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var items []model.UserFollow
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var total int64
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if accessible {
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items, total, err = s.repo.ListFollowing(userID, p.Offset(), p.PageSize)
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if err != nil {
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return nil, fmt.Errorf("查询关注列表: %w", err)
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}
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} else {
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total, err = s.repo.CountFollowing(userID)
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if err != nil {
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return nil, fmt.Errorf("查询关注数: %w", err)
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}
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items = []model.UserFollow{}
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}
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if items == nil {
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items = []model.UserFollow{}
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}
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return &FollowListResult{
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Items: items,
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Total: total,
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Page: p.Page,
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TotalPages: common.PageCount(total, p.PageSize),
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ListPublic: listPublic,
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Accessible: accessible,
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}, nil
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}
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