biz

type GroupResult struct {
	GroupMember string
	Err         error
	Seq         int64
}

type MessageUseCase interface {
	Send(ctx context.Context, from, to, jsonMsg string) (seq int64, err error)
	SendGroup(ctx context.Context, group string, groupMember []string, jsonMsg string) (result []*GroupResult, err error)
	GetSyncMessage(ctx context.Context, member string, lastRead int64, limit int) ([]data.Message, int64, error)

	GetSingleHistoryMessage(ctx context.Context, from, to string, lastRead int64, numOfHistory int32) ([]data.Message, error)
	GetGroupHistoryMessage(ctx context.Context, group string, lastRead int64, numOfHistory int32) ([]data.Message, error)
}