void CalendarMgr::SendCalendarEventInvite(CalendarInvite const& invite)
{
    CalendarEvent* calendarEvent = GetEvent(invite.GetEventId());
    time_t statusTime = invite.GetStatusTime();
    bool hasStatusTime = statusTime != 946684800;   // 01/01/2000 00:00:00

    ObjectGuid invitee = invite.GetInviteeGUID();
    Player* player = ObjectAccessor::FindConnectedPlayer(invitee);

    uint8 level = player ? player->getLevel() : sCharacterCache->GetCharacterLevelByGuid(invitee);

    WorldPacket data(SMSG_CALENDAR_EVENT_INVITE, 8 + 8 + 8 + 1 + 1 + 1 + (4) + 1);
    data << invitee.WriteAsPacked();
    data << uint64(invite.GetEventId());
    data << uint64(invite.GetInviteId());
    data << uint8(level);
    data << uint8(invite.GetStatus());
    data << uint8(hasStatusTime);
    if (hasStatusTime)
        data.AppendPackedTime(statusTime);
    data << uint8(invite.GetSenderGUID() != invite.GetInviteeGUID()); // false only if the invite is sign-up

    if (!calendarEvent) // Pre-invite
    {
        if (Player* playerSender = ObjectAccessor::FindConnectedPlayer(invite.GetSenderGUID()))
            playerSender->SendDirectMessage(&data);
    }
    else
    {
        if (calendarEvent->GetCreatorGUID() != invite.GetInviteeGUID()) // correct?
            SendPacketToAllEventRelatives(data, *calendarEvent);
    }
}
void CalendarMgr::SendCalendarEventStatus(CalendarEvent const& calendarEvent, CalendarInvite const& invite)
{
    WorldPacket data(SMSG_CALENDAR_EVENT_STATUS, 8 + 8 + 4 + 4 + 1 + 1 + 4);
    data << invite.GetInviteeGUID().WriteAsPacked();
    data << uint64(calendarEvent.GetEventId());
    data.AppendPackedTime(calendarEvent.GetEventTime());
    data << uint32(calendarEvent.GetFlags());
    data << uint8(invite.GetStatus());
    data << uint8(invite.GetRank());
    data.AppendPackedTime(invite.GetStatusTime());

    SendPacketToAllEventRelatives(data, calendarEvent);
}