220 lines
7.3 KiB
Go
220 lines
7.3 KiB
Go
package service
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import (
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"context"
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"time"
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roomeventsv1 "hyapp/api/proto/events/room/v1"
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roomv1 "hyapp/api/proto/room/v1"
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"hyapp/pkg/tencentim"
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"hyapp/pkg/xerr"
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"hyapp/services/room-service/internal/room/command"
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"hyapp/services/room-service/internal/room/outbox"
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"hyapp/services/room-service/internal/room/rank"
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"hyapp/services/room-service/internal/room/state"
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)
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// MicUp 把目标用户放到指定麦位。
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func (s *Service) MicUp(ctx context.Context, req *roomv1.MicUpRequest) (*roomv1.MicUpResponse, error) {
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// MicUp 以 actor 作为上麦目标，管理员代操作走 MicDown/ChangeMicSeat 等显式 target 命令。
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cmd := command.MicUp{
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Base: baseFromMeta(req.GetMeta()),
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SeatNo: req.GetSeatNo(),
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}
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result, err := s.mutateRoom(ctx, cmd, true, func(now time.Time, current *state.RoomState, _ *rank.LocalRank) (mutationResult, []outbox.Record, error) {
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if _, exists := current.OnlineUsers[cmd.ActorUserID()]; !exists {
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// 不在 room-service presence 的用户不能上麦。
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return mutationResult{}, nil, xerr.New(xerr.NotFound, "user not in room")
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}
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if _, exists := current.SeatByUser(cmd.ActorUserID()); exists {
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// 一个用户同一时间只能占一个麦位。
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return mutationResult{}, nil, xerr.New(xerr.Conflict, "user already on seat")
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}
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index := current.SeatIndex(cmd.SeatNo)
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if index < 0 {
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// 麦位编号必须来自房间初始化的 MicSeats。
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return mutationResult{}, nil, xerr.New(xerr.InvalidArgument, "seat does not exist")
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}
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if current.MicSeats[index].Locked {
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// 锁定麦位不能被普通上麦命令占用。
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return mutationResult{}, nil, xerr.New(xerr.PermissionDenied, "seat is locked")
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}
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if current.MicSeats[index].UserID != 0 {
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// 非空麦位不能被覆盖，避免两个用户同时占同一麦位。
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return mutationResult{}, nil, xerr.New(xerr.Conflict, "seat is occupied")
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}
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// 麦位占用和房间版本必须在同一个 Room Cell 任务里更新。
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current.MicSeats[index].UserID = cmd.ActorUserID()
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current.Version++
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// RoomMicChanged 是房间外消费者和腾讯云 IM 共同使用的麦位事件源。
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micEvent, err := outbox.Build(current.RoomID, "RoomMicChanged", current.Version, now, &roomeventsv1.RoomMicChanged{
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ActorUserId: cmd.ActorUserID(),
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TargetUserId: cmd.ActorUserID(),
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FromSeat: 0,
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ToSeat: cmd.SeatNo,
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Action: "up",
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})
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if err != nil {
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return mutationResult{}, nil, err
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}
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return mutationResult{
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snapshot: current.ToProto(),
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seatNo: cmd.SeatNo,
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syncEvent: &tencentim.RoomEvent{
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EventID: micEvent.EventID,
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RoomID: current.RoomID,
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EventType: "room_mic_up",
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ActorUserID: cmd.ActorUserID(),
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TargetUserID: cmd.ActorUserID(),
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SeatNo: cmd.SeatNo,
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RoomVersion: current.Version,
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},
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}, []outbox.Record{micEvent}, 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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return &roomv1.MicUpResponse{
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Result: commandResult(result.applied, result.snapshot.GetVersion(), s.clock.Now()),
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SeatNo: result.seatNo,
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Room: result.snapshot,
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}, nil
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}
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// MicDown 把目标用户从当前麦位移下。
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func (s *Service) MicDown(ctx context.Context, req *roomv1.MicDownRequest) (*roomv1.MicDownResponse, error) {
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// MicDown 支持操作者和目标用户不同，权限策略后续可在命令入口扩展。
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cmd := command.MicDown{
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Base: baseFromMeta(req.GetMeta()),
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TargetUserID: req.GetTargetUserId(),
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}
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result, err := s.mutateRoom(ctx, cmd, true, func(now time.Time, current *state.RoomState, _ *rank.LocalRank) (mutationResult, []outbox.Record, error) {
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seat, exists := current.SeatByUser(cmd.TargetUserID)
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if !exists {
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// 目标用户不在麦上时不能生成下麦事件。
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return mutationResult{}, nil, xerr.New(xerr.NotFound, "target not on seat")
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}
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// SeatByUser 返回的是值拷贝，真正修改需要再定位切片下标。
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index := current.SeatIndex(seat.SeatNo)
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current.MicSeats[index].UserID = 0
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current.Version++
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micEvent, err := outbox.Build(current.RoomID, "RoomMicChanged", current.Version, now, &roomeventsv1.RoomMicChanged{
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ActorUserId: cmd.ActorUserID(),
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TargetUserId: cmd.TargetUserID,
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FromSeat: seat.SeatNo,
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ToSeat: 0,
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Action: "down",
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})
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if err != nil {
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return mutationResult{}, nil, err
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}
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return mutationResult{
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snapshot: current.ToProto(),
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seatNo: seat.SeatNo,
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syncEvent: &tencentim.RoomEvent{
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EventID: micEvent.EventID,
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RoomID: current.RoomID,
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EventType: "room_mic_down",
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ActorUserID: cmd.ActorUserID(),
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TargetUserID: cmd.TargetUserID,
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SeatNo: seat.SeatNo,
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RoomVersion: current.Version,
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},
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}, []outbox.Record{micEvent}, 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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return &roomv1.MicDownResponse{
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Result: commandResult(result.applied, result.snapshot.GetVersion(), s.clock.Now()),
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SeatNo: result.seatNo,
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Room: result.snapshot,
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}, nil
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}
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// ChangeMicSeat 调整指定用户所在麦位。
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func (s *Service) ChangeMicSeat(ctx context.Context, req *roomv1.ChangeMicSeatRequest) (*roomv1.ChangeMicSeatResponse, error) {
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// ChangeMicSeat 是原子换位：从原麦位清空和写入新麦位必须同版本完成。
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cmd := command.ChangeMicSeat{
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Base: baseFromMeta(req.GetMeta()),
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TargetUserID: req.GetTargetUserId(),
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SeatNo: req.GetSeatNo(),
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}
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result, err := s.mutateRoom(ctx, cmd, true, func(now time.Time, current *state.RoomState, _ *rank.LocalRank) (mutationResult, []outbox.Record, error) {
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fromSeat, exists := current.SeatByUser(cmd.TargetUserID)
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if !exists {
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// 未上麦用户没有可换出的源麦位。
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return mutationResult{}, nil, xerr.New(xerr.NotFound, "target not on seat")
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}
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toIndex := current.SeatIndex(cmd.SeatNo)
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if toIndex < 0 {
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// 目标麦位必须存在。
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return mutationResult{}, nil, xerr.New(xerr.InvalidArgument, "seat does not exist")
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}
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if current.MicSeats[toIndex].Locked {
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// 锁定麦位不能换入。
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return mutationResult{}, nil, xerr.New(xerr.PermissionDenied, "seat is locked")
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}
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if current.MicSeats[toIndex].UserID != 0 {
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// 目标麦位被占用时拒绝换位，避免覆盖另一个用户。
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return mutationResult{}, nil, xerr.New(xerr.Conflict, "seat is occupied")
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}
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// 清空源麦位和占用目标麦位在同一 Cell 任务内完成，客户端不会看到中间态。
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fromIndex := current.SeatIndex(fromSeat.SeatNo)
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current.MicSeats[fromIndex].UserID = 0
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current.MicSeats[toIndex].UserID = cmd.TargetUserID
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current.Version++
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micEvent, err := outbox.Build(current.RoomID, "RoomMicChanged", current.Version, now, &roomeventsv1.RoomMicChanged{
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ActorUserId: cmd.ActorUserID(),
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TargetUserId: cmd.TargetUserID,
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FromSeat: fromSeat.SeatNo,
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ToSeat: cmd.SeatNo,
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Action: "change",
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})
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if err != nil {
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return mutationResult{}, nil, err
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}
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return mutationResult{
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snapshot: current.ToProto(),
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syncEvent: &tencentim.RoomEvent{
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EventID: micEvent.EventID,
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RoomID: current.RoomID,
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EventType: "room_mic_change",
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ActorUserID: cmd.ActorUserID(),
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TargetUserID: cmd.TargetUserID,
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SeatNo: cmd.SeatNo,
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RoomVersion: current.Version,
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},
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}, []outbox.Record{micEvent}, 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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return &roomv1.ChangeMicSeatResponse{
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Result: commandResult(result.applied, result.snapshot.GetVersion(), s.clock.Now()),
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Room: result.snapshot,
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}, nil
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}
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