feat: 实时消息与管理端运营能力
新增群聊/私信与公共 WebSocket 总线，站长用户内容档案，并将通知与待审角标改为推送驱动；同步精简管理仪表盘并修复主题换肤 DOM 冲突。 Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
992
backend/service/chat.go
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992
backend/service/chat.go
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@@ -0,0 +1,992 @@
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// Package service 群聊业务（二期）。
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//
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// 铁律：消息先落库再由 handler 经 WS 广播，WS 不承担可靠投递；
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// 未读数以成员行 last_read_message_id 为水位做 SQL 对账，离线期间不丢消息。
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package service
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import (
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"errors"
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"regexp"
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"sort"
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"strconv"
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"strings"
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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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var (
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ErrChatNotFound = errors.New("会话不存在")
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ErrChatNotMember = errors.New("不是会话成员")
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ErrChatNameInvalid = errors.New("群名称需为 2-32 个字符")
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ErrChatDescInvalid = errors.New("群简介不能超过 200 个字符")
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ErrChatContentEmpty = errors.New("消息内容不能为空")
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ErrChatContentTooLong = errors.New("单条消息不能超过 2000 个字符")
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ErrChatMuted = errors.New("你已被群主禁言")
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ErrChatOwnerOnly = errors.New("仅群主可执行该操作")
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ErrChatOwnerLeave = errors.New("群主不能直接退出，请先解散该群")
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ErrChatPrivateInvite = errors.New("私密群需邀请才能加入")
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ErrChatDefaultLeave = errors.New("默认大厅不可退出")
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ErrChatDefaultDissolve = errors.New("默认大厅不可解散")
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ErrChatRecallDenied = errors.New("无权撤回该消息")
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ErrChatMsgNotFound = errors.New("消息不存在")
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ErrChatDMSelf = errors.New("不能与自己私聊")
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ErrChatDMDissolve = errors.New("私聊会话不可解散")
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ErrChatUserGone = errors.New("用户不存在或已封禁")
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ErrChatHallPinFixed = errors.New("大厅已置顶且不可取消")
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)
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// CanOverseeChat 站长/超管可旁路查看全部群并撤回任意消息
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func CanOverseeChat(role model.Role) bool {
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return role == model.RoleOwner || role == model.RoleSuperAdmin
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}
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const (
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chatNameMinRune = 2
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chatNameMaxRune = 32
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chatDescMaxRune = 200
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chatMsgMaxRune = 2000
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chatMentionMax = 20
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)
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// chatMentionRe @提醒匹配：用户名 3-32 位字母/数字/下划线/连字符；
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// 是否有效最终以"群成员精确匹配"为准，名单外的 @ 原样当普通文本
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var chatMentionRe = regexp.MustCompile(`@([A-Za-z0-9_-]{3,32})`)
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// ChatService 群聊服务
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type ChatService struct {
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db *gorm.DB
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notif *NotificationService
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}
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func NewChatService(db *gorm.DB, notif *NotificationService) *ChatService {
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return &ChatService{db: db, notif: notif}
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}
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// RoomView 会话列表/详情聚合视图
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type RoomView struct {
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model.ChatRoom
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Joined bool `json:"joined"`
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MyRole string `json:"my_role"`
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UnreadCount int64 `json:"unread_count"`
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Pinned bool `json:"pinned"` // 对当前用户是否置顶（含大厅强制）
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PinForced bool `json:"pin_forced"` // 大厅强制置顶，不可取消
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Peer *model.User `json:"peer,omitempty"` // 私聊对方（仅 direct）
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}
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// UnreadRoom 单个会话的未读计数
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type UnreadRoom struct {
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RoomID uint `gorm:"column:room_id" json:"room_id"`
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Count int64 `gorm:"column:cnt" json:"count"`
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}
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func directKey(a, b uint) string {
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if a > b {
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a, b = b, a
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}
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return strconv.FormatUint(uint64(a), 10) + ":" + strconv.FormatUint(uint64(b), 10)
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}
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func (s *ChatService) getRoom(roomID uint) (*model.ChatRoom, error) {
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var room model.ChatRoom
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err := s.db.First(&room, roomID).Error
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, ErrChatNotFound
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}
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if err != nil {
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return nil, err
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}
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return &room, nil
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}
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func (s *ChatService) membership(tx *gorm.DB, roomID, userID uint) (*model.ChatRoomMember, error) {
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var m model.ChatRoomMember
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err := tx.Where("room_id = ? AND user_id = ?", roomID, userID).First(&m).Error
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, ErrChatNotMember
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}
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if err != nil {
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return nil, err
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}
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return &m, nil
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}
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// Membership 供 WS 握手后动态订阅房间鉴权
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func (s *ChatService) Membership(roomID, userID uint) (*model.ChatRoomMember, error) {
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return s.membership(s.db, roomID, userID)
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}
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// unreadCounts 批量计算访问者在给定群集合中的未读数（消息 ID 大于已读水位即未读）
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func (s *ChatService) unreadCounts(userID uint, roomIDs []uint) map[uint]int64 {
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out := make(map[uint]int64)
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if userID == 0 || len(roomIDs) == 0 {
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return out
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}
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var rows []UnreadRoom
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s.db.Table("chat_messages AS m").
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Select("m.room_id AS room_id, count(*) AS cnt").
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Joins("JOIN chat_room_members AS rm ON rm.room_id = m.room_id AND rm.user_id = ?", userID).
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Where("m.room_id IN ? AND m.id > rm.last_read_message_id AND m.deleted_at IS NULL AND m.recalled_at IS NULL", roomIDs).
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Group("m.room_id").
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Scan(&rows)
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for _, r := range rows {
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out[r.RoomID] = r.Count
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}
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return out
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}
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// toViews 批量填充 joined/角色/未读（避免 N+1）
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func (s *ChatService) toViews(rooms []model.ChatRoom, userID uint) []RoomView {
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ids := make([]uint, 0, len(rooms))
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for i := range rooms {
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ids = append(ids, rooms[i].ID)
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}
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memberMap := make(map[uint]model.ChatRoomMember)
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if userID != 0 && len(ids) > 0 {
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var ms []model.ChatRoomMember
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s.db.Where("user_id = ? AND room_id IN ?", userID, ids).Find(&ms)
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for _, m := range ms {
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memberMap[m.RoomID] = m
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}
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}
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unread := s.unreadCounts(userID, ids)
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views := make([]RoomView, 0, len(rooms))
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for _, r := range rooms {
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v := RoomView{ChatRoom: r, UnreadCount: unread[r.ID]}
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if r.IsDefault {
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v.Pinned = true
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v.PinForced = true
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}
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if m, ok := memberMap[r.ID]; ok {
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v.Joined = true
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v.MyRole = m.Role
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if m.PinnedAt != nil {
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v.Pinned = true
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}
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}
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views = append(views, v)
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}
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s.attachPeers(views, userID)
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sortRoomViews(views, memberMap)
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return views
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}
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// sortRoomViews：大厅强制置顶 > 个人置顶(pinned_at DESC) > last_message_id DESC
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func sortRoomViews(views []RoomView, memberMap map[uint]model.ChatRoomMember) {
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sort.SliceStable(views, func(i, j int) bool {
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a, b := views[i], views[j]
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if a.IsDefault != b.IsDefault {
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return a.IsDefault
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}
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aPin, bPin := !a.IsDefault && a.Pinned, !b.IsDefault && b.Pinned
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if aPin != bPin {
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return aPin
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}
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if aPin && bPin {
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var at, bt time.Time
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if m, ok := memberMap[a.ID]; ok && m.PinnedAt != nil {
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at = *m.PinnedAt
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}
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if m, ok := memberMap[b.ID]; ok && m.PinnedAt != nil {
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bt = *m.PinnedAt
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}
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if !at.Equal(bt) {
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return at.After(bt)
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}
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}
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if a.LastMessageID != b.LastMessageID {
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return a.LastMessageID > b.LastMessageID
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}
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return a.ID > b.ID
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})
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}
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// attachPeers 为私聊会话填充对方用户信息
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func (s *ChatService) attachPeers(views []RoomView, viewerID uint) {
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directIDs := make([]uint, 0)
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for i := range views {
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if views[i].RoomType == model.ChatRoomTypeDirect {
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directIDs = append(directIDs, views[i].ID)
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}
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}
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if len(directIDs) == 0 {
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return
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}
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var members []model.ChatRoomMember
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s.db.Where("room_id IN ? AND user_id <> ?", directIDs, viewerID).Preload("User").Find(&members)
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peerByRoom := make(map[uint]*model.User, len(members))
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for i := range members {
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u := members[i].User
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peerByRoom[members[i].RoomID] = &u
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}
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for i := range views {
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if p, ok := peerByRoom[views[i].ID]; ok {
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views[i].Peer = p
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if views[i].Name == "" && p != nil {
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views[i].Name = p.Nickname
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if views[i].Name == "" {
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views[i].Name = p.Username
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}
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}
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}
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}
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}
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// CreateRoom 建群：任意登录用户可建；isPrivate 时仅邀请可进；memberIDs 为初始成员（不含创建者）
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func (s *ChatService) CreateRoom(creatorID uint, name, description string, isPrivate bool, memberIDs []uint) (*RoomView, error) {
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name = strings.TrimSpace(name)
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description = strings.TrimSpace(description)
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if l := len([]rune(name)); l < chatNameMinRune || l > chatNameMaxRune {
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return nil, ErrChatNameInvalid
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}
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if len([]rune(description)) > chatDescMaxRune {
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return nil, ErrChatDescInvalid
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}
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// 去重、排除自己
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seen := map[uint]struct{}{creatorID: {}}
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cleanIDs := make([]uint, 0, len(memberIDs))
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for _, id := range memberIDs {
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if id == 0 {
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continue
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}
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if _, ok := seen[id]; ok {
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continue
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}
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seen[id] = struct{}{}
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cleanIDs = append(cleanIDs, id)
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}
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room := model.ChatRoom{
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Name: name,
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Description: description,
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OwnerID: creatorID,
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RoomType: model.ChatRoomTypeGroup,
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IsPrivate: isPrivate,
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MemberCount: 1 + len(cleanIDs),
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}
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err := s.db.Transaction(func(tx *gorm.DB) error {
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if err := tx.Create(&room).Error; err != nil {
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return err
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}
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m := model.ChatRoomMember{RoomID: room.ID, UserID: creatorID, Role: model.ChatRoleOwner}
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if err := tx.Create(&m).Error; err != nil {
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return err
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}
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for _, uid := range cleanIDs {
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mm := model.ChatRoomMember{RoomID: room.ID, UserID: uid, Role: model.ChatRoleMember}
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if err := tx.Create(&mm).Error; err != nil {
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return err
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}
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}
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return nil
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})
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if err != nil {
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return nil, err
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}
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var full model.ChatRoom
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if err := s.db.Preload("Owner").First(&full, room.ID).Error; err != nil {
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return nil, err
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}
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v := RoomView{ChatRoom: full, Joined: true, MyRole: model.ChatRoleOwner}
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return &v, nil
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}
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// ListRooms 会话列表。joinedOnly=true 时仅已加入（IM 侧栏）；否则公开群 + 已加入私密（站长旁路可见全部）
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func (s *ChatService) ListRooms(userID uint, oversee, joinedOnly bool, q string, page, size int) ([]RoomView, int64, error) {
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if page < 1 {
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page = 1
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}
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if size < 1 || size > 50 {
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size = 20
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}
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query := s.db.Model(&model.ChatRoom{})
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if joinedOnly && userID > 0 {
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query = query.Where("id IN (SELECT room_id FROM chat_room_members WHERE user_id = ?)", userID)
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} else if !oversee {
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if userID == 0 {
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query = query.Where("is_private = ? AND room_type = ?", false, model.ChatRoomTypeGroup)
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} else {
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query = query.Where(
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"(is_private = ? AND room_type = ?) OR id IN (SELECT room_id FROM chat_room_members WHERE user_id = ?)",
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false, model.ChatRoomTypeGroup, userID,
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)
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}
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}
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if q = strings.TrimSpace(q); q != "" {
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esc := strings.NewReplacer(`\`, `\\`, `%`, `\%`, `_`, `\_`).Replace(q)
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query = query.Where(`name ILIKE ? ESCAPE '\'`, "%"+esc+"%")
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}
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var total int64
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if err := query.Count(&total).Error; err != nil {
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return nil, 0, err
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}
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var rooms []model.ChatRoom
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// 已加入列表需按个人置顶排序：先全量取出再内存排序分页（会话量通常很小）
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if joinedOnly && userID > 0 {
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if err := query.
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Preload("Owner").Preload("LastMessage.Sender").
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Find(&rooms).Error; err != nil {
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return nil, 0, err
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}
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views := s.toViews(rooms, userID)
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start := (page - 1) * size
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if start >= len(views) {
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return []RoomView{}, total, nil
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}
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end := start + size
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if end > len(views) {
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end = len(views)
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}
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return views[start:end], total, nil
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}
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if err := query.
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Order("is_default DESC, last_message_id DESC, id DESC").
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Offset((page - 1) * size).Limit(size).
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Preload("Owner").Preload("LastMessage.Sender").
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Find(&rooms).Error; err != nil {
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return nil, 0, err
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}
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return s.toViews(rooms, userID), total, nil
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}
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// SetRoomPinned 当前用户置顶/取消置顶（大厅强制置顶不可取消）
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func (s *ChatService) SetRoomPinned(userID, roomID uint, pinned bool) (*RoomView, error) {
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room, err := s.getRoom(roomID)
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if err != nil {
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return nil, err
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}
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if room.IsDefault {
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return nil, ErrChatHallPinFixed
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}
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m, err := s.membership(s.db, roomID, userID)
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if err != nil {
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return nil, err
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}
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if pinned {
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now := time.Now()
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if err := s.db.Model(m).Update("pinned_at", now).Error; err != nil {
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return nil, err
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}
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} else {
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if err := s.db.Model(m).Update("pinned_at", nil).Error; err != nil {
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return nil, err
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}
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}
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return s.RoomDetail(userID, roomID, false)
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}
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// GetOrCreateDM 获取或创建与对方的一对一私聊（幂等）
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func (s *ChatService) GetOrCreateDM(meID, peerID uint) (*RoomView, error) {
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if peerID == 0 || peerID == meID {
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return nil, ErrChatDMSelf
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}
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var peer model.User
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if err := s.db.Where("id = ? AND banned = ? AND deleted_at IS NULL", peerID, false).First(&peer).Error; err != nil {
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return nil, ErrChatUserGone
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}
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key := directKey(meID, peerID)
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var existing model.ChatRoom
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err := s.db.Where("room_type = ? AND direct_key = ?", model.ChatRoomTypeDirect, key).First(&existing).Error
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if err == nil {
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_ = s.ensureMember(existing.ID, meID)
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_ = s.ensureMember(existing.ID, peerID)
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return s.RoomDetail(meID, existing.ID, false)
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}
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if !errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, err
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}
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room := model.ChatRoom{
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Name: "",
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OwnerID: meID,
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RoomType: model.ChatRoomTypeDirect,
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DirectKey: key,
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IsPrivate: true,
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MemberCount: 2,
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}
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err = s.db.Transaction(func(tx *gorm.DB) error {
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if e := tx.Create(&room).Error; e != nil {
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return e
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}
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ms := []model.ChatRoomMember{
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{RoomID: room.ID, UserID: meID, Role: model.ChatRoleMember},
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{RoomID: room.ID, UserID: peerID, Role: model.ChatRoleMember},
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}
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return tx.Create(&ms).Error
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})
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if err != nil {
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if e2 := s.db.Where("room_type = ? AND direct_key = ?", model.ChatRoomTypeDirect, key).First(&existing).Error; e2 == nil {
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return s.RoomDetail(meID, existing.ID, false)
|
||||
}
|
||||
return nil, err
|
||||
}
|
||||
return s.RoomDetail(meID, room.ID, false)
|
||||
}
|
||||
|
||||
func (s *ChatService) ensureMember(roomID, userID uint) error {
|
||||
_, err := s.membership(s.db, roomID, userID)
|
||||
if err == nil {
|
||||
return nil
|
||||
}
|
||||
if !errors.Is(err, ErrChatNotMember) {
|
||||
return err
|
||||
}
|
||||
m := model.ChatRoomMember{RoomID: roomID, UserID: userID, Role: model.ChatRoleMember}
|
||||
if e := s.db.Create(&m).Error; e != nil {
|
||||
return e
|
||||
}
|
||||
return s.db.Model(&model.ChatRoom{}).Where("id = ?", roomID).
|
||||
UpdateColumn("member_count", gorm.Expr("GREATEST(member_count + 1, 0)")).Error
|
||||
}
|
||||
|
||||
// ListMemberIDs 房间全部成员 ID（发消息后推未读角标用）
|
||||
func (s *ChatService) ListMemberIDs(roomID uint) ([]uint, error) {
|
||||
var ids []uint
|
||||
err := s.db.Model(&model.ChatRoomMember{}).Where("room_id = ?", roomID).Pluck("user_id", &ids).Error
|
||||
return ids, err
|
||||
}
|
||||
|
||||
// SearchUsersForChat 按用户名/昵称搜索可发起私聊的用户（排除自己、封禁）
|
||||
func (s *ChatService) SearchUsersForChat(meID uint, q string, limit int) ([]model.User, error) {
|
||||
q = strings.TrimSpace(q)
|
||||
if q == "" {
|
||||
return nil, nil
|
||||
}
|
||||
if limit < 1 || limit > 20 {
|
||||
limit = 10
|
||||
}
|
||||
esc := strings.NewReplacer(`\`, `\\`, `%`, `\%`, `_`, `\_`).Replace(q)
|
||||
like := "%" + esc + "%"
|
||||
var users []model.User
|
||||
err := s.db.Select("id", "username", "nickname", "avatar", "role").
|
||||
Where("id <> ? AND banned = ? AND deleted_at IS NULL AND (username ILIKE ? ESCAPE '\\' OR nickname ILIKE ? ESCAPE '\\')",
|
||||
meID, false, like, like).
|
||||
Order("username ASC").Limit(limit).Find(&users).Error
|
||||
return users, err
|
||||
}
|
||||
|
||||
// RoomDetail 群详情：成员或监管者可读；公开非成员返回 joined=false（可预览元数据）
|
||||
func (s *ChatService) RoomDetail(userID, roomID uint, oversee bool) (*RoomView, error) {
|
||||
room, err := s.getRoom(roomID)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
_, memErr := s.membership(s.db, roomID, userID)
|
||||
isMember := memErr == nil
|
||||
if !isMember && !oversee {
|
||||
if room.IsPrivate {
|
||||
return nil, ErrChatNotFound // 私密非成员伪装不存在
|
||||
}
|
||||
// 公开非成员：允许预览
|
||||
} else if memErr != nil && !oversee && !errors.Is(memErr, ErrChatNotMember) {
|
||||
return nil, memErr
|
||||
}
|
||||
if err := s.db.Preload("Owner").Preload("LastMessage.Sender").First(room, roomID).Error; err != nil {
|
||||
return nil, err
|
||||
}
|
||||
views := s.toViews([]model.ChatRoom{*room}, userID)
|
||||
v := views[0]
|
||||
if oversee && !v.Joined {
|
||||
v.Joined = true // 监管旁路按已加入展示，可看历史
|
||||
v.MyRole = "overseer"
|
||||
}
|
||||
return &v, nil
|
||||
}
|
||||
|
||||
// Join 加入公开群（私密/私聊拒绝；幂等）
|
||||
func (s *ChatService) Join(userID, roomID uint) (member *model.ChatRoomMember, joined bool, err error) {
|
||||
room, err := s.getRoom(roomID)
|
||||
if err != nil {
|
||||
return nil, false, err
|
||||
}
|
||||
if room.RoomType == model.ChatRoomTypeDirect {
|
||||
return nil, false, ErrChatNotFound
|
||||
}
|
||||
if room.IsPrivate {
|
||||
return nil, false, ErrChatPrivateInvite
|
||||
}
|
||||
if m, mErr := s.membership(s.db, roomID, userID); mErr == nil {
|
||||
return m, false, nil
|
||||
} else if !errors.Is(mErr, ErrChatNotMember) {
|
||||
return nil, false, mErr
|
||||
}
|
||||
m := model.ChatRoomMember{RoomID: roomID, UserID: userID, Role: model.ChatRoleMember}
|
||||
err = s.db.Transaction(func(tx *gorm.DB) error {
|
||||
if e := tx.Create(&m).Error; e != nil {
|
||||
return e
|
||||
}
|
||||
return tx.Model(&model.ChatRoom{}).Where("id = ?", roomID).
|
||||
UpdateColumn("member_count", gorm.Expr("GREATEST(member_count + 1, 0)")).Error
|
||||
})
|
||||
if err != nil {
|
||||
if existing, qErr := s.membership(s.db, roomID, userID); qErr == nil {
|
||||
return existing, false, nil
|
||||
}
|
||||
return nil, false, err
|
||||
}
|
||||
return &m, true, nil
|
||||
}
|
||||
|
||||
// InviteMembers 群主（或监管）拉人入群；返回实际新加入的用户 ID
|
||||
func (s *ChatService) InviteMembers(operatorID, roomID uint, userIDs []uint, oversee bool) ([]uint, error) {
|
||||
room, err := s.getRoom(roomID)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if room.RoomType == model.ChatRoomTypeDirect {
|
||||
return nil, ErrChatOwnerOnly
|
||||
}
|
||||
if !oversee {
|
||||
op, err := s.membership(s.db, roomID, operatorID)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if op.Role != model.ChatRoleOwner {
|
||||
return nil, ErrChatOwnerOnly
|
||||
}
|
||||
}
|
||||
added := make([]uint, 0)
|
||||
for _, uid := range userIDs {
|
||||
if uid == 0 {
|
||||
continue
|
||||
}
|
||||
if _, mErr := s.membership(s.db, roomID, uid); mErr == nil {
|
||||
continue
|
||||
}
|
||||
var u model.User
|
||||
if err := s.db.Select("id").Where("id = ? AND banned = ? AND deleted_at IS NULL", uid, false).First(&u).Error; err != nil {
|
||||
continue
|
||||
}
|
||||
m := model.ChatRoomMember{RoomID: roomID, UserID: uid, Role: model.ChatRoleMember}
|
||||
if room.OwnerID == uid {
|
||||
m.Role = model.ChatRoleOwner
|
||||
}
|
||||
err := s.db.Transaction(func(tx *gorm.DB) error {
|
||||
if e := tx.Create(&m).Error; e != nil {
|
||||
return e
|
||||
}
|
||||
return tx.Model(&model.ChatRoom{}).Where("id = ?", roomID).
|
||||
UpdateColumn("member_count", gorm.Expr("GREATEST(member_count + 1, 0)")).Error
|
||||
})
|
||||
if err == nil {
|
||||
added = append(added, uid)
|
||||
}
|
||||
}
|
||||
return added, nil
|
||||
}
|
||||
|
||||
// EnsureDefaultMembership 将用户加入默认大厅（注册后调用，幂等）
|
||||
func (s *ChatService) EnsureDefaultMembership(userID uint) error {
|
||||
var room model.ChatRoom
|
||||
if err := s.db.Where("is_default = ?", true).First(&room).Error; err != nil {
|
||||
return nil // 尚无大厅则跳过
|
||||
}
|
||||
if _, err := s.membership(s.db, room.ID, userID); err == nil {
|
||||
return nil
|
||||
}
|
||||
m := model.ChatRoomMember{RoomID: room.ID, UserID: userID, Role: model.ChatRoleMember}
|
||||
return s.db.Transaction(func(tx *gorm.DB) error {
|
||||
if e := tx.Create(&m).Error; e != nil {
|
||||
return e
|
||||
}
|
||||
return tx.Model(&model.ChatRoom{}).Where("id = ?", room.ID).
|
||||
UpdateColumn("member_count", gorm.Expr("GREATEST(member_count + 1, 0)")).Error
|
||||
})
|
||||
}
|
||||
|
||||
// Leave 普通成员退出群聊（群主不可退出；默认大厅不可退出；私聊可退出）
|
||||
func (s *ChatService) Leave(userID, roomID uint) error {
|
||||
room, err := s.getRoom(roomID)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if room.IsDefault {
|
||||
return ErrChatDefaultLeave
|
||||
}
|
||||
m, err := s.membership(s.db, roomID, userID)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if room.RoomType != model.ChatRoomTypeDirect && m.Role == model.ChatRoleOwner {
|
||||
return ErrChatOwnerLeave
|
||||
}
|
||||
return s.removeMember(roomID, userID)
|
||||
}
|
||||
|
||||
// removeMember 删除成员行并把群人数 -1（不小于 0）
|
||||
func (s *ChatService) removeMember(roomID, userID uint) error {
|
||||
return s.db.Transaction(func(tx *gorm.DB) error {
|
||||
res := tx.Where("room_id = ? AND user_id = ?", roomID, userID).Delete(&model.ChatRoomMember{})
|
||||
if res.Error != nil {
|
||||
return res.Error
|
||||
}
|
||||
if res.RowsAffected == 0 {
|
||||
return nil
|
||||
}
|
||||
return tx.Model(&model.ChatRoom{}).Where("id = ?", roomID).
|
||||
UpdateColumn("member_count", gorm.Expr("GREATEST(member_count - 1, 0)")).Error
|
||||
})
|
||||
}
|
||||
|
||||
// Dissolve 群主解散群（默认大厅/私聊不可解散）
|
||||
func (s *ChatService) Dissolve(userID, roomID uint, oversee bool) error {
|
||||
room, err := s.getRoom(roomID)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if room.IsDefault {
|
||||
return ErrChatDefaultDissolve
|
||||
}
|
||||
if room.RoomType == model.ChatRoomTypeDirect {
|
||||
return ErrChatDMDissolve
|
||||
}
|
||||
if !oversee {
|
||||
m, err := s.membership(s.db, roomID, userID)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if m.Role != model.ChatRoleOwner {
|
||||
return ErrChatOwnerOnly
|
||||
}
|
||||
}
|
||||
return s.db.Transaction(func(tx *gorm.DB) error {
|
||||
if err := tx.Delete(&model.ChatRoom{}, roomID).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
return tx.Where("room_id = ?", roomID).Delete(&model.ChatRoomMember{}).Error
|
||||
})
|
||||
}
|
||||
|
||||
// UpdateRoom 群主修改群名称/简介
|
||||
func (s *ChatService) UpdateRoom(userID, roomID uint, name, description string) (*model.ChatRoom, error) {
|
||||
name = strings.TrimSpace(name)
|
||||
description = strings.TrimSpace(description)
|
||||
if l := len([]rune(name)); l < chatNameMinRune || l > chatNameMaxRune {
|
||||
return nil, ErrChatNameInvalid
|
||||
}
|
||||
if len([]rune(description)) > chatDescMaxRune {
|
||||
return nil, ErrChatDescInvalid
|
||||
}
|
||||
room, err := s.getRoom(roomID)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
m, err := s.membership(s.db, roomID, userID)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if m.Role != model.ChatRoleOwner {
|
||||
return nil, ErrChatOwnerOnly
|
||||
}
|
||||
if err := s.db.Model(room).Updates(map[string]interface{}{
|
||||
"name": name,
|
||||
"description": description,
|
||||
}).Error; err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return s.getRoom(roomID)
|
||||
}
|
||||
|
||||
// ListMembers 成员名单：成员或监管者可查看
|
||||
func (s *ChatService) ListMembers(userID, roomID uint, oversee bool) ([]model.ChatRoomMember, error) {
|
||||
if _, err := s.getRoom(roomID); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if !oversee {
|
||||
if _, err := s.membership(s.db, roomID, userID); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
var list []model.ChatRoomMember
|
||||
err := s.db.Where("room_id = ?", roomID).
|
||||
Order("CASE WHEN role = 'owner' THEN 0 ELSE 1 END, created_at ASC").
|
||||
Preload("User").
|
||||
Find(&list).Error
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return list, nil
|
||||
}
|
||||
|
||||
// Kick 群主踢人（不能踢群主）
|
||||
func (s *ChatService) Kick(operatorID, roomID, targetID uint) error {
|
||||
if _, err := s.getRoom(roomID); err != nil {
|
||||
return err
|
||||
}
|
||||
op, err := s.membership(s.db, roomID, operatorID)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if op.Role != model.ChatRoleOwner {
|
||||
return ErrChatOwnerOnly
|
||||
}
|
||||
target, err := s.membership(s.db, roomID, targetID)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if target.Role == model.ChatRoleOwner {
|
||||
return ErrChatOwnerOnly
|
||||
}
|
||||
return s.removeMember(roomID, targetID)
|
||||
}
|
||||
|
||||
// SendMessage 发送群消息：成员且未被禁言；可选引用回复；解析@并落提醒通知。
|
||||
func (s *ChatService) SendMessage(senderID, roomID uint, content string, replyToID uint) (*model.ChatMessage, []uint, error) {
|
||||
content = strings.TrimSpace(content)
|
||||
if content == "" {
|
||||
return nil, nil, ErrChatContentEmpty
|
||||
}
|
||||
if len([]rune(content)) > chatMsgMaxRune {
|
||||
return nil, nil, ErrChatContentTooLong
|
||||
}
|
||||
if _, err := s.getRoom(roomID); err != nil {
|
||||
return nil, nil, err
|
||||
}
|
||||
m, err := s.membership(s.db, roomID, senderID)
|
||||
if err != nil {
|
||||
return nil, nil, err
|
||||
}
|
||||
if m.Muted {
|
||||
return nil, nil, ErrChatMuted
|
||||
}
|
||||
|
||||
replySnap := ""
|
||||
if replyToID > 0 {
|
||||
var quoted model.ChatMessage
|
||||
if err := s.db.Where("id = ? AND room_id = ?", replyToID, roomID).
|
||||
Preload("Sender").First("ed).Error; err != nil {
|
||||
if errors.Is(err, gorm.ErrRecordNotFound) {
|
||||
return nil, nil, ErrChatMsgNotFound
|
||||
}
|
||||
return nil, nil, err
|
||||
}
|
||||
name := quoted.Sender.Nickname
|
||||
if name == "" {
|
||||
name = quoted.Sender.Username
|
||||
}
|
||||
if quoted.RecalledAt != nil {
|
||||
replySnap = name + ": （已撤回的消息）"
|
||||
} else {
|
||||
snippet := quoted.Content
|
||||
rs := []rune(snippet)
|
||||
if len(rs) > 80 {
|
||||
snippet = string(rs[:80]) + "…"
|
||||
}
|
||||
replySnap = name + ": " + snippet
|
||||
}
|
||||
}
|
||||
|
||||
mentionIDs := s.resolveMentions(roomID, senderID, content)
|
||||
|
||||
msg := &model.ChatMessage{
|
||||
RoomID: roomID,
|
||||
SenderID: senderID,
|
||||
Content: content,
|
||||
ReplyToID: replyToID,
|
||||
ReplySnap: replySnap,
|
||||
MentionIDs: joinMentionIDs(mentionIDs),
|
||||
}
|
||||
err = s.db.Transaction(func(tx *gorm.DB) error {
|
||||
if err := tx.Create(msg).Error; err != nil {
|
||||
return err
|
||||
}
|
||||
return tx.Model(&model.ChatRoom{}).Where("id = ?", roomID).
|
||||
Updates(map[string]interface{}{
|
||||
"last_message_id": msg.ID,
|
||||
"updated_at": time.Now(),
|
||||
}).Error
|
||||
})
|
||||
if err != nil {
|
||||
return nil, nil, err
|
||||
}
|
||||
if err := s.db.Preload("Sender").First(msg, msg.ID).Error; err != nil {
|
||||
return nil, nil, err
|
||||
}
|
||||
for _, uid := range mentionIDs {
|
||||
s.notif.CreateMention(uid, senderID, roomID, msg.ID, content)
|
||||
}
|
||||
return msg, mentionIDs, nil
|
||||
}
|
||||
|
||||
// resolveMentions 文本中 @用户名 → 群成员用户 ID（去重、排除自己、上限 20）
|
||||
func (s *ChatService) resolveMentions(roomID, senderID uint, content string) []uint {
|
||||
matches := chatMentionRe.FindAllStringSubmatch(content, -1)
|
||||
if len(matches) == 0 {
|
||||
return nil
|
||||
}
|
||||
nameSet := make(map[string]struct{}, len(matches))
|
||||
names := make([]string, 0, len(matches))
|
||||
for _, mt := range matches {
|
||||
name := strings.ToLower(mt[1])
|
||||
if _, ok := nameSet[name]; ok {
|
||||
continue
|
||||
}
|
||||
nameSet[name] = struct{}{}
|
||||
names = append(names, name)
|
||||
}
|
||||
if len(names) == 0 {
|
||||
return nil
|
||||
}
|
||||
// 用户名大小写不敏感匹配（注册名唯一但比较时统一 lower）
|
||||
var users []model.User
|
||||
s.db.Where("LOWER(username) IN ? AND banned = ?", names, false).Find(&users)
|
||||
if len(users) == 0 {
|
||||
return nil
|
||||
}
|
||||
userIDs := make([]uint, 0, len(users))
|
||||
for _, u := range users {
|
||||
userIDs = append(userIDs, u.ID)
|
||||
}
|
||||
var memberIDs []uint
|
||||
s.db.Model(&model.ChatRoomMember{}).
|
||||
Where("room_id = ? AND user_id IN ?", roomID, userIDs).
|
||||
Pluck("user_id", &memberIDs)
|
||||
seen := make(map[uint]struct{}, len(memberIDs))
|
||||
out := make([]uint, 0, len(memberIDs))
|
||||
for _, id := range memberIDs {
|
||||
if id == senderID {
|
||||
continue
|
||||
}
|
||||
if _, ok := seen[id]; ok {
|
||||
continue
|
||||
}
|
||||
seen[id] = struct{}{}
|
||||
out = append(out, id)
|
||||
if len(out) >= chatMentionMax {
|
||||
break
|
||||
}
|
||||
}
|
||||
return out
|
||||
}
|
||||
|
||||
func joinMentionIDs(ids []uint) string {
|
||||
if len(ids) == 0 {
|
||||
return ""
|
||||
}
|
||||
parts := make([]string, len(ids))
|
||||
for i, id := range ids {
|
||||
parts[i] = strconv.FormatUint(uint64(id), 10)
|
||||
}
|
||||
return strings.Join(parts, ",")
|
||||
}
|
||||
|
||||
// ListMessages 历史消息分页：成员或监管者可取；已撤回消息仍返回（前端显示占位）
|
||||
func (s *ChatService) ListMessages(userID, roomID, beforeID uint, size int, oversee bool) ([]model.ChatMessage, bool, error) {
|
||||
if size < 1 || size > 50 {
|
||||
size = 30
|
||||
}
|
||||
if _, err := s.getRoom(roomID); err != nil {
|
||||
return nil, false, err
|
||||
}
|
||||
if !oversee {
|
||||
if _, err := s.membership(s.db, roomID, userID); err != nil {
|
||||
return nil, false, err
|
||||
}
|
||||
}
|
||||
q := s.db.Where("room_id = ?", roomID)
|
||||
if beforeID > 0 {
|
||||
q = q.Where("id < ?", beforeID)
|
||||
}
|
||||
var msgs []model.ChatMessage
|
||||
if err := q.Order("id DESC").Limit(size + 1).Preload("Sender").Find(&msgs).Error; err != nil {
|
||||
return nil, false, err
|
||||
}
|
||||
hasMore := len(msgs) > size
|
||||
if hasMore {
|
||||
msgs = msgs[:size]
|
||||
}
|
||||
for i, j := 0, len(msgs)-1; i < j; i, j = i+1, j-1 {
|
||||
msgs[i], msgs[j] = msgs[j], msgs[i]
|
||||
}
|
||||
// 对非监管者清空已撤回正文
|
||||
if !oversee {
|
||||
for i := range msgs {
|
||||
if msgs[i].RecalledAt != nil {
|
||||
msgs[i].Content = ""
|
||||
}
|
||||
}
|
||||
}
|
||||
return msgs, hasMore, nil
|
||||
}
|
||||
|
||||
// RecallMessage 撤回消息：群主可撤自己的；监管者可撤任意；标记 RecalledAt 不清行
|
||||
func (s *ChatService) RecallMessage(operatorID, roomID, messageID uint, oversee bool) (*model.ChatMessage, error) {
|
||||
if _, err := s.getRoom(roomID); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
var msg model.ChatMessage
|
||||
if err := s.db.Where("id = ? AND room_id = ?", messageID, roomID).First(&msg).Error; err != nil {
|
||||
if errors.Is(err, gorm.ErrRecordNotFound) {
|
||||
return nil, ErrChatMsgNotFound
|
||||
}
|
||||
return nil, err
|
||||
}
|
||||
if msg.RecalledAt != nil {
|
||||
return &msg, nil // 幂等
|
||||
}
|
||||
if !oversee {
|
||||
m, err := s.membership(s.db, roomID, operatorID)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
// 群主/成员仅可撤回自己的消息；监管者可撤任意
|
||||
if msg.SenderID != operatorID {
|
||||
_ = m // 成员校验已通过
|
||||
return nil, ErrChatRecallDenied
|
||||
}
|
||||
}
|
||||
now := time.Now()
|
||||
if err := s.db.Model(&msg).Updates(map[string]interface{}{
|
||||
"recalled_at": now,
|
||||
"recalled_by": operatorID,
|
||||
"content": "",
|
||||
}).Error; err != nil {
|
||||
return nil, err
|
||||
}
|
||||
msg.RecalledAt = &now
|
||||
msg.RecalledBy = operatorID
|
||||
msg.Content = ""
|
||||
_ = s.db.Preload("Sender").First(&msg, msg.ID)
|
||||
return &msg, nil
|
||||
}
|
||||
|
||||
// MarkRead 把已读水位推进到指定消息（单调不减；messageID=0 或超过最新则取最新）
|
||||
func (s *ChatService) MarkRead(userID, roomID, messageID uint) error {
|
||||
room, err := s.getRoom(roomID)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if _, err := s.membership(s.db, roomID, userID); err != nil {
|
||||
return err
|
||||
}
|
||||
if messageID == 0 || messageID > room.LastMessageID {
|
||||
messageID = room.LastMessageID
|
||||
}
|
||||
return s.db.Model(&model.ChatRoomMember{}).
|
||||
Where("room_id = ? AND user_id = ? AND last_read_message_id < ?", roomID, userID, messageID).
|
||||
Update("last_read_message_id", messageID).Error
|
||||
}
|
||||
|
||||
// UnreadSummary 当前用户所有群的未读明细与总数
|
||||
func (s *ChatService) UnreadSummary(userID uint) (int64, []UnreadRoom, error) {
|
||||
var rows []UnreadRoom
|
||||
err := s.db.Table("chat_messages AS m").
|
||||
Select("m.room_id AS room_id, count(*) AS cnt").
|
||||
Joins("JOIN chat_room_members AS rm ON rm.room_id = m.room_id AND rm.user_id = ?", userID).
|
||||
Where("m.id > rm.last_read_message_id AND m.deleted_at IS NULL AND m.recalled_at IS NULL").
|
||||
Group("m.room_id").
|
||||
Scan(&rows).Error
|
||||
if err != nil {
|
||||
return 0, nil, err
|
||||
}
|
||||
var total int64
|
||||
for _, r := range rows {
|
||||
total += r.Count
|
||||
}
|
||||
return total, rows, nil
|
||||
}
|
||||
|
||||
// TotalUnread 供 /me SSR 一次调用（Header 红点直出）
|
||||
func (s *ChatService) TotalUnread(userID uint) int64 {
|
||||
total, _, _ := s.UnreadSummary(userID)
|
||||
return total
|
||||
}
|
||||
Reference in New Issue
Block a user