feat: 完成社区首页功能迭代，新增首页聚合与工作台组件
本次提交实现了完整的社区首页功能： 1. 新增首页聚合接口与服务，包含社区统计、热门帖、活跃用户与板块数据 2. 实现帖子推荐排序、SSR缓存与点赞态同步逻辑 3. 重构导航与布局系统，新增工作台侧边栏与移动端适配 4. 优化主题色与UI样式，统一设计系统风格 5. 修复登录注册页自动跳转与组件状态同步问题
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167
backend/service/overview.go
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167
backend/service/overview.go
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package service
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import (
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"time"
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"github.com/freefire/jiang13-bbs/model"
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"gorm.io/gorm"
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)
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// OverviewService 首页聚合服务：一次请求返回统计、热门榜、活跃用户、板块计数
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type OverviewService struct {
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db *gorm.DB
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}
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func NewOverviewService(db *gorm.DB) *OverviewService {
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return &OverviewService{db: db}
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}
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// OverviewStats 社区整体统计
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type OverviewStats struct {
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Posts int64 `json:"posts"`
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Users int64 `json:"users"`
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Comments int64 `json:"comments"`
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TodayPosts int64 `json:"today_posts"`
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}
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// ActiveUser 近 14 天活跃用户
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type ActiveUser struct {
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ID uint `json:"id"`
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Username string `json:"username"`
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Nickname string `json:"nickname"`
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Avatar string `json:"avatar"`
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ActivityCount int64 `json:"activity_count"`
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}
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// BoardCount 板块及其已发布帖子计数（Board 字段被 encoding/json 展平）
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type BoardCount struct {
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model.Board
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PostCount int64 `json:"post_count"`
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}
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// OverviewData 首页聚合数据
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type OverviewData struct {
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Stats OverviewStats `json:"stats"`
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Hot []PostListItem `json:"hot"`
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ActiveUsers []ActiveUser `json:"active_users"`
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Boards []BoardCount `json:"boards"`
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}
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const activeUserWindow = 14 * 24 * time.Hour
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// Get 聚合首页数据。hot 的 liked 态由 handler 层按当前用户填充。
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func (s *OverviewService) Get() (*OverviewData, error) {
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data := &OverviewData{
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Hot: []PostListItem{},
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ActiveUsers: []ActiveUser{},
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Boards: []BoardCount{},
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}
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now := time.Now()
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dayStart := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
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since := now.Add(-activeUserWindow)
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// 统计
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postQ := s.db.Model(&model.Post{}).Where("status = ?", model.ContentStatusPublished)
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if err := postQ.Count(&data.Stats.Posts).Error; err != nil {
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return nil, err
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}
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if err := s.db.Model(&model.User{}).Count(&data.Stats.Users).Error; err != nil {
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return nil, err
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}
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if err := s.db.Model(&model.Comment{}).Where("status = ?", model.ContentStatusPublished).Count(&data.Stats.Comments).Error; err != nil {
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return nil, err
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}
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if err := s.db.Model(&model.Post{}).
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Where("status = ? AND created_at >= ?", model.ContentStatusPublished, dayStart).
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Count(&data.Stats.TodayPosts).Error; err != nil {
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return nil, err
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}
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// 热门榜：非置顶，按 赞 + 评论×2
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var hotPosts []model.Post
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if err := s.db.Where("status = ? AND pinned = 0", model.ContentStatusPublished).
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Order("(like_count + comment_count * 2) DESC, created_at DESC").
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Limit(5).Preload("Board").Preload("User").Find(&hotPosts).Error; err != nil {
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return nil, err
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}
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data.Hot = toPostListItems(hotPosts)
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// 活跃用户：近 14 天发帖+评论合并计数，JOIN 用户过滤封禁/软删
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type activityRow struct {
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UserID uint
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ActivityCount int64
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}
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var rows []activityRow
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activitySQL := `
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SELECT a.user_id AS user_id, COUNT(*) AS activity_count
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FROM (
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SELECT user_id FROM posts WHERE status = ? AND created_at >= ? AND deleted_at IS NULL
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UNION ALL
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SELECT user_id FROM comments WHERE status = ? AND created_at >= ? AND deleted_at IS NULL
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) AS a
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JOIN users AS u ON u.id = a.user_id
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WHERE u.banned = ? AND u.deleted_at IS NULL
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GROUP BY a.user_id
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ORDER BY activity_count DESC, a.user_id ASC
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LIMIT 5`
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if err := s.db.Raw(activitySQL,
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model.ContentStatusPublished, since,
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model.ContentStatusPublished, since,
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false).Scan(&rows).Error; err != nil {
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return nil, err
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}
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if len(rows) > 0 {
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ids := make([]uint, 0, len(rows))
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for _, r := range rows {
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ids = append(ids, r.UserID)
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}
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var users []model.User
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if err := s.db.Where("id IN ?", ids).Find(&users).Error; err != nil {
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return nil, err
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}
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userMap := make(map[uint]model.User, len(users))
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for _, u := range users {
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userMap[u.ID] = u
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}
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for _, r := range rows {
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u, ok := userMap[r.UserID]
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if !ok {
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continue
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}
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data.ActiveUsers = append(data.ActiveUsers, ActiveUser{
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ID: u.ID,
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Username: u.Username,
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Nickname: u.Nickname,
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Avatar: u.Avatar,
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ActivityCount: r.ActivityCount,
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})
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}
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}
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// 板块 + 各自帖子计数（一条 GROUP BY）
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var boards []model.Board
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if err := s.db.Order("sort_order ASC, id ASC").Find(&boards).Error; err != nil {
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return nil, err
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}
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type countRow struct {
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BoardID uint
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Cnt int64
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}
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var counts []countRow
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if err := s.db.Model(&model.Post{}).
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Select("board_id, COUNT(*) AS cnt").
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Where("status = ?", model.ContentStatusPublished).
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Group("board_id").Scan(&counts).Error; err != nil {
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return nil, err
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}
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countMap := make(map[uint]int64, len(counts))
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for _, c := range counts {
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countMap[c.BoardID] = c.Cnt
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}
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for _, b := range boards {
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data.Boards = append(data.Boards, BoardCount{Board: b, PostCount: countMap[b.ID]})
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}
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return data, nil
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}
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