86 lines
2.7 KiB
Go
86 lines
2.7 KiB
Go
package service
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import (
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"context"
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"strings"
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roomv1 "hyapp.local/api/proto/room/v1"
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"hyapp/pkg/roomid"
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"hyapp/pkg/xerr"
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)
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// FollowRoom 建立当前用户对房间的关注关系。
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// 关注关系是用户个性化读模型事实，不改变 Room Cell 核心状态，也不需要 Redis lease 串行化。
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func (s *Service) FollowRoom(ctx context.Context, req *roomv1.FollowRoomRequest) (*roomv1.FollowRoomResponse, error) {
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ctx = contextFromMeta(ctx, req.GetMeta())
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roomID, userID, err := normalizeRoomFollowInput(req.GetMeta(), req.GetRoomId(), req.GetUserId())
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if err != nil {
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return nil, err
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}
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meta, exists, err := s.repository.GetRoomMeta(ctx, roomID)
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if err != nil {
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return nil, err
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}
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if !exists {
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return nil, xerr.New(xerr.NotFound, "room not found")
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}
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if isClosedRoomStatus(meta.Status) {
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// 已关闭房间不再建立新的关注关系；历史关注仍可通过 UnfollowRoom 幂等取消。
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return nil, xerr.New(xerr.RoomClosed, "room closed")
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}
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nowMS := s.clock.Now().UnixMilli()
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record, err := s.repository.FollowRoom(ctx, userID, roomID, nowMS)
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if err != nil {
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return nil, err
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}
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return &roomv1.FollowRoomResponse{
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RoomId: roomID,
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Followed: true,
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FollowedAtMs: record.FollowedAtMS,
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ServerTimeMs: nowMS,
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}, nil
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}
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// UnfollowRoom 取消当前用户对房间的关注关系。
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// 未关注或历史房间已关闭都按幂等成功处理，方便客户端在本地状态不确定时直接收敛。
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func (s *Service) UnfollowRoom(ctx context.Context, req *roomv1.UnfollowRoomRequest) (*roomv1.UnfollowRoomResponse, error) {
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ctx = contextFromMeta(ctx, req.GetMeta())
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roomID, userID, err := normalizeRoomFollowInput(req.GetMeta(), req.GetRoomId(), req.GetUserId())
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if err != nil {
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return nil, err
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}
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nowMS := s.clock.Now().UnixMilli()
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if err := s.repository.UnfollowRoom(ctx, userID, roomID, nowMS); err != nil {
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return nil, err
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}
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return &roomv1.UnfollowRoomResponse{
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RoomId: roomID,
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Followed: false,
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ServerTimeMs: nowMS,
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}, nil
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}
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func normalizeRoomFollowInput(meta *roomv1.RequestMeta, rawRoomID string, userID int64) (string, int64, error) {
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roomID := strings.TrimSpace(rawRoomID)
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metaRoomID := strings.TrimSpace(meta.GetRoomId())
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if roomID == "" {
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roomID = metaRoomID
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}
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if metaRoomID != "" && roomID != metaRoomID {
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// meta.room_id 是链路和审计字段；与 body/path room_id 不一致时必须拒绝，避免写错关系。
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return "", 0, xerr.New(xerr.InvalidArgument, "room_id is invalid")
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}
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if !roomid.ValidStringID(roomID) {
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return "", 0, xerr.New(xerr.InvalidArgument, "room_id is invalid")
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}
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if userID <= 0 {
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return "", 0, xerr.New(xerr.InvalidArgument, "user_id is required")
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}
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return roomID, userID, nil
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}
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