// this method tries to create battleground or arena with MinPlayersPerTeam against MinPlayersPerTeam
bool BattlegroundQueue::CheckNormalMatch(Battleground* bgTemplate, BattlegroundBracketId bracket_id, uint32 minPlayers, uint32 maxPlayers)
{
    // if current queue is BATTLEGROUND_QUEUE_RB, then we are trying to create bg using players from 2 queues
    if (bgTemplate->GetBgTypeID() == BATTLEGROUND_RB)
    {
        // specific template
        Battleground* specificTemplate = sBattlegroundMgr->GetBattlegroundTemplate(sBattlegroundMgr->RandomSystem.GetCurrentRandomBg());
        if (!specificTemplate)
            return false;

        // specific bracket id
        PvPDifficultyEntry const* specificBracket = GetBattlegroundBracketByLevel(specificTemplate->GetMapId(), sBattlegroundMgr->randomBgDifficultyEntry.minLevel);
        if (!specificBracket || specificBracket->maxLevel < sBattlegroundMgr->randomBgDifficultyEntry.maxLevel)
            return false;

        // specific queue
        BattlegroundQueue& specificQueue = sBattlegroundMgr->GetBattlegroundQueue(BattlegroundMgr::BGQueueTypeId(sBattlegroundMgr->RandomSystem.GetCurrentRandomBg(), 0));

        FillPlayersToBGWithSpecific(specificTemplate->GetMaxPlayersPerTeam(), specificTemplate->GetMaxPlayersPerTeam(), bracket_id, &specificQueue, BattlegroundBracketId(specificBracket->bracketId));

        //allow 1v0 if debug bg
        if (sBattlegroundMgr->isTesting() && bgTemplate->isBattleground() && (m_SelectionPools[TEAM_ALLIANCE].GetPlayerCount() || m_SelectionPools[TEAM_HORDE].GetPlayerCount()))
            return true;

        return m_SelectionPools[TEAM_ALLIANCE].GetPlayerCount() >= std::min<uint32>(specificTemplate->GetMinPlayersPerTeam(), 15) && m_SelectionPools[TEAM_HORDE].GetPlayerCount() >= std::min<uint32>(specificTemplate->GetMinPlayersPerTeam(), 15);
    }
    // if this is not random bg queue - use players only from this queue
    else
    {
        FillPlayersToBG(maxPlayers, maxPlayers, bracket_id);

        //allow 1v0 if debug bg
        if (sBattlegroundMgr->isTesting() && bgTemplate->isBattleground() && (m_SelectionPools[TEAM_ALLIANCE].GetPlayerCount() || m_SelectionPools[TEAM_HORDE].GetPlayerCount()))
            return true;

        return m_SelectionPools[TEAM_ALLIANCE].GetPlayerCount() >= minPlayers && m_SelectionPools[TEAM_HORDE].GetPlayerCount() >= minPlayers;
    }
}
void WorldSession::HandleBattlemasterJoinOpcode(WorldPacket & recv_data)
{
    uint8 joinAsGroup;
    uint32 bgTypeId_;
    uint32 unk, unk2;
    bool isPremade = false;
    Group * grp = NULL;

    recv_data >> joinAsGroup;                               // join as group (join as group = 0x80, else 0x0)
    recv_data >> unk;                                       // unk
    recv_data >> bgTypeId_;                                 // battleground type id (DBC id)
    recv_data >> unk2;                                      // unk

    if (!sBattlemasterListStore.LookupEntry(bgTypeId_))
    {
        sLog->outError("Battleground: invalid bgtype (%u) received. possible cheater? player guid %u", bgTypeId_, _player->GetGUIDLow());
        return;
    }

    if (sDisableMgr->IsDisabledFor(DISABLE_TYPE_BATTLEGROUND, bgTypeId_, NULL))
    {
        ChatHandler(this).PSendSysMessage(LANG_BG_DISABLED);
        return;
    }

    BattlegroundTypeId bgTypeId = BattlegroundTypeId(bgTypeId_);

    // can do this, since it's battleground, not arena
    BattlegroundQueueTypeId bgQueueTypeId = BattlegroundMgr::BGQueueTypeId(bgTypeId, 0);
    BattlegroundQueueTypeId bgQueueTypeIdRandom = BattlegroundMgr::BGQueueTypeId(BATTLEGROUND_RB, 0);

    // ignore if player is already in BG
    if (_player->InBattleground())
        return;

    // get bg template
    Battleground *bg = sBattlegroundMgr->GetBattlegroundTemplate(bgTypeId);
    if (!bg)
        return;

    // expected bracket entry
    PvPDifficultyEntry const* bracketEntry = GetBattlegroundBracketByLevel(bg->GetMapId(), _player->getLevel());
    if (!bracketEntry)
        return;

    GroupJoinBattlegroundResult err;

    // check queue conditions
    if (!joinAsGroup)
    {
        if (GetPlayer()->isUsingLfg())
        {
            // player is using dungeon finder or raid finder
            WorldPacket data;
            sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, ERR_LFG_CANT_USE_BATTLEGROUND);
            GetPlayer()->GetSession()->SendPacket(&data);
            return;
        }

        // check Deserter debuff
        if (!_player->CanJoinToBattleground())
        {
            WorldPacket data;
            sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, ERR_GROUP_JOIN_BATTLEGROUND_DESERTERS);
            _player->GetSession()->SendPacket(&data);
            return;
        }

        if (_player->GetBattlegroundQueueIndex(bgQueueTypeIdRandom) < PLAYER_MAX_BATTLEGROUND_QUEUES)
        {
            //player is already in random queue
            WorldPacket data;
            sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, ERR_IN_RANDOM_BG);
            _player->GetSession()->SendPacket(&data);
            return;
        }

        if (_player->InBattlegroundQueue() && bgTypeId == BATTLEGROUND_RB)
        {
            //player is already in queue, can't start random queue
            WorldPacket data;
            sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, ERR_IN_NON_RANDOM_BG);
            _player->GetSession()->SendPacket(&data);
            return;
        }

        // check if already in queue
        if (_player->GetBattlegroundQueueIndex(bgQueueTypeId) < PLAYER_MAX_BATTLEGROUND_QUEUES)
            //player is already in this queue
            return;

        // check if has free queue slots
        if (!_player->HasFreeBattlegroundQueueId())
        {
            WorldPacket data;
            sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, ERR_BATTLEGROUND_TOO_MANY_QUEUES);
            _player->GetSession()->SendPacket(&data);
            return;
        }

        BattlegroundQueue& bgQueue = sBattlegroundMgr->m_BattlegroundQueues[bgQueueTypeId];

        GroupQueueInfo * ginfo = bgQueue.AddGroup(_player, NULL, bgTypeId, bracketEntry, 0, false, isPremade, 0, 0);
        uint32 avgTime = bgQueue.GetAverageQueueWaitTime(ginfo, bracketEntry->GetBracketId());
        // already checked if queueSlot is valid, now just get it
        uint32 queueSlot = _player->AddBattlegroundQueueId(bgQueueTypeId);

        WorldPacket data;
                                                            // send status packet (in queue)
        sBattlegroundMgr->BuildBattlegroundStatusPacket(&data, bg, queueSlot, STATUS_WAIT_QUEUE, avgTime, 0, ginfo->ArenaType);
        SendPacket(&data);
        sLog->outDebug(LOG_FILTER_BATTLEGROUND, "Battleground: player joined queue for bg queue type %u bg type %u: GUID %u, NAME %s", bgQueueTypeId, bgTypeId, _player->GetGUIDLow(), _player->GetName());
    }
    else
    {
        grp = _player->GetGroup();
        // no group found, error
        if (!grp)
            return;
        if (grp->GetLeaderGUID() != _player->GetGUID())
            return;
        err = grp->CanJoinBattlegroundQueue(bg, bgQueueTypeId, 0, bg->GetMaxPlayersPerTeam(), false, 0);
        isPremade = (grp->GetMembersCount() >= bg->GetMinPlayersPerTeam());

        BattlegroundQueue& bgQueue = sBattlegroundMgr->m_BattlegroundQueues[bgQueueTypeId];
        GroupQueueInfo * ginfo = NULL;
        uint32 avgTime = 0;

        if (err > 0)
        {
            sLog->outDebug(LOG_FILTER_BATTLEGROUND, "Battleground: the following players are joining as group:");
            ginfo = bgQueue.AddGroup(_player, grp, bgTypeId, bracketEntry, 0, false, isPremade, 0, 0);
            avgTime = bgQueue.GetAverageQueueWaitTime(ginfo, bracketEntry->GetBracketId());
        }

        for (GroupReference *itr = grp->GetFirstMember(); itr != NULL; itr = itr->next())
        {
            Player *member = itr->getSource();
            if (!member) continue;   // this should never happen

            WorldPacket data;

            if (err <= 0)
            {
                sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, err);
                member->GetSession()->SendPacket(&data);
                continue;
            }

            // add to queue
            uint32 queueSlot = member->AddBattlegroundQueueId(bgQueueTypeId);

            // send status packet (in queue)
            sBattlegroundMgr->BuildBattlegroundStatusPacket(&data, bg, queueSlot, STATUS_WAIT_QUEUE, avgTime, 0, ginfo->ArenaType);
            member->GetSession()->SendPacket(&data);
            sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, err);
            member->GetSession()->SendPacket(&data);
            sLog->outDebug(LOG_FILTER_BATTLEGROUND, "Battleground: player joined queue for bg queue type %u bg type %u: GUID %u, NAME %s", bgQueueTypeId, bgTypeId, member->GetGUIDLow(), member->GetName());
        }
        sLog->outDebug(LOG_FILTER_BATTLEGROUND, "Battleground: group end");
    }
    sBattlegroundMgr->ScheduleQueueUpdate(0, 0, bgQueueTypeId, bgTypeId, bracketEntry->GetBracketId());
}
void WorldSession::HandleBattlemasterJoinOpcode(WorldPacket& recvData)
{
    uint32 bgTypeId_;
    uint32 instanceId;
    uint8 asGroup;
    bool isPremade = false;
    Group* grp = NULL;
    ObjectGuid guid;

    recvData >> instanceId;                 // Instance Id
    guid[2] = recvData.ReadBit();
    guid[0] = recvData.ReadBit();
    guid[3] = recvData.ReadBit();
    guid[1] = recvData.ReadBit();
    guid[5] = recvData.ReadBit();
    asGroup = recvData.ReadBit();           // As Group
    guid[4] = recvData.ReadBit();
    guid[6] = recvData.ReadBit();
    guid[7] = recvData.ReadBit();

    recvData.ReadByteSeq(guid[2]);
    recvData.ReadByteSeq(guid[6]);
    recvData.ReadByteSeq(guid[4]);
    recvData.ReadByteSeq(guid[3]);
    recvData.ReadByteSeq(guid[7]);
    recvData.ReadByteSeq(guid[0]);
    recvData.ReadByteSeq(guid[5]);
    recvData.ReadByteSeq(guid[1]);

    //extract from guid
    bgTypeId_ = GUID_LOPART(guid);

    if (!sBattlemasterListStore.LookupEntry(bgTypeId_))
    {
        TC_LOG_ERROR("network", "Battleground: invalid bgtype (%u) received. possible cheater? player guid %u", bgTypeId_, _player->GetGUIDLow());
        return;
    }

    if (DisableMgr::IsDisabledFor(DISABLE_TYPE_BATTLEGROUND, bgTypeId_, NULL))
    {
        ChatHandler(this).PSendSysMessage(LANG_BG_DISABLED);
        return;
    }
    BattlegroundTypeId bgTypeId = BattlegroundTypeId(bgTypeId_);

    //TC_LOG_DEBUG("network", "WORLD: Recvd CMSG_BATTLEMASTER_JOIN Message from (GUID:"UI64FMTD" TypeId:%u)", guid, bgTypeId_);

    // can do this, since it's battleground, not arena
    BattlegroundQueueTypeId bgQueueTypeId = BattlegroundMgr::BGQueueTypeId(bgTypeId, 0);
    BattlegroundQueueTypeId bgQueueTypeIdRandom = BattlegroundMgr::BGQueueTypeId(BATTLEGROUND_RB, 0);

    // ignore if player is already in BG
    if (_player->InBattleground())
        return;

    // get bg instance or bg template if instance not found
    Battleground* bg = NULL;
    if (instanceId)
        bg = sBattlegroundMgr->GetBattlegroundThroughClientInstance(instanceId, bgTypeId);

    if (!bg)
        bg = sBattlegroundMgr->GetBattlegroundTemplate(bgTypeId);
    if (!bg)
        return;

    // expected bracket entry
    PvPDifficultyEntry const* bracketEntry = GetBattlegroundBracketByLevel(bg->GetMapId(), _player->getLevel());
    if (!bracketEntry)
        return;

    GroupJoinBattlegroundResult err = ERR_BATTLEGROUND_NONE;

    // check queue conditions
    if (!asGroup)
    {
        if (GetPlayer()->isUsingLfg())
        {
            WorldPacket data;
            sBattlegroundMgr->BuildStatusFailedPacket(&data, bg, _player, 0, ERR_LFG_CANT_USE_BATTLEGROUND);
            GetPlayer()->GetSession()->SendPacket(&data);
            return;
        }

        // check Deserter debuff
        if (!_player->CanJoinToBattleground(bg))
        {
            WorldPacket data;
            sBattlegroundMgr->BuildStatusFailedPacket(&data, bg, _player, 0, ERR_GROUP_JOIN_BATTLEGROUND_DESERTERS);
            _player->GetSession()->SendPacket(&data);
            return;
        }

        if (_player->GetBattlegroundQueueIndex(bgQueueTypeIdRandom) < PLAYER_MAX_BATTLEGROUND_QUEUES)
        {
            // player is already in random queue
            WorldPacket data;
            sBattlegroundMgr->BuildStatusFailedPacket(&data, bg, _player, 0, ERR_IN_RANDOM_BG);
            _player->GetSession()->SendPacket(&data);
            return;
        }

        if (_player->InBattlegroundQueue() && bgTypeId == BATTLEGROUND_RB)
        {
            // player is already in queue, can't start random queue
            WorldPacket data;
            sBattlegroundMgr->BuildStatusFailedPacket(&data, bg, _player, 0, ERR_IN_NON_RANDOM_BG);
            _player->GetSession()->SendPacket(&data);
            return;
        }

        // check if already in queue
        if (_player->GetBattlegroundQueueIndex(bgQueueTypeId) < PLAYER_MAX_BATTLEGROUND_QUEUES)
            // player is already in this queue
            return;

        // check if has free queue slots
        if (!_player->HasFreeBattlegroundQueueId())
        {
            WorldPacket data;
            sBattlegroundMgr->BuildStatusFailedPacket(&data, bg, _player, 0, ERR_BATTLEGROUND_TOO_MANY_QUEUES);
            _player->GetSession()->SendPacket(&data);
            return;
        }

        BattlegroundQueue& bgQueue = sBattlegroundMgr->GetBattlegroundQueue(bgQueueTypeId);
        GroupQueueInfo* ginfo = bgQueue.AddGroup(_player, NULL, bgTypeId, bracketEntry, 0, false, isPremade, 0, 0);

        uint32 avgTime = bgQueue.GetAverageQueueWaitTime(ginfo, bracketEntry->GetBracketId());
        uint32 queueSlot = _player->AddBattlegroundQueueId(bgQueueTypeId);

        // add joined time data
        _player->AddBattlegroundQueueJoinTime(bgTypeId, ginfo->JoinTime);

        WorldPacket data; // send status packet (in queue)
        sBattlegroundMgr->BuildBattlegroundStatusPacket(&data, bg, _player, queueSlot, STATUS_WAIT_QUEUE, avgTime, ginfo->JoinTime, ginfo->ArenaType);
        SendPacket(&data);

        TC_LOG_DEBUG("bg.battleground", "Battleground: player joined queue for bg queue type %u bg type %u: GUID %u, NAME %s",
                       bgQueueTypeId, bgTypeId, _player->GetGUIDLow(), _player->GetName().c_str());
    }
    else
    {
        grp = _player->GetGroup();

        if (!grp)
            return;

        if (grp->GetLeaderGUID() != _player->GetGUID())
            return;

        err = grp->CanJoinBattlegroundQueue(bg, bgQueueTypeId, 0, bg->GetMaxPlayersPerTeam(), false, 0);
        isPremade = (grp->GetMembersCount() >= bg->GetMinPlayersPerTeam());

        BattlegroundQueue& bgQueue = sBattlegroundMgr->GetBattlegroundQueue(bgQueueTypeId);
        GroupQueueInfo* ginfo = NULL;
        uint32 avgTime = 0;

        if (!err)
        {
            TC_LOG_DEBUG("bg.battleground", "Battleground: the following players are joining as group:");
            ginfo = bgQueue.AddGroup(_player, grp, bgTypeId, bracketEntry, 0, false, isPremade, 0, 0);
            avgTime = bgQueue.GetAverageQueueWaitTime(ginfo, bracketEntry->GetBracketId());
        }

        for (GroupReference* itr = grp->GetFirstMember(); itr != NULL; itr = itr->next())
        {
            Player* member = itr->GetSource();
            if (!member)
                continue;   // this should never happen

            if (err)
            {
                WorldPacket data;
                sBattlegroundMgr->BuildStatusFailedPacket(&data, bg, _player, 0, err);
                member->GetSession()->SendPacket(&data);
                continue;
            }

            // add to queue
            uint32 queueSlot = member->AddBattlegroundQueueId(bgQueueTypeId);

            // add joined time data
            member->AddBattlegroundQueueJoinTime(bgTypeId, ginfo->JoinTime);

            WorldPacket data; // send status packet (in queue)
            sBattlegroundMgr->BuildBattlegroundStatusPacket(&data, bg, member, queueSlot, STATUS_WAIT_QUEUE, avgTime, ginfo->JoinTime, ginfo->ArenaType);
            member->GetSession()->SendPacket(&data);
            TC_LOG_DEBUG("bg.battleground", "Battleground: player joined queue for bg queue type %u bg type %u: GUID %u, NAME %s",
                bgQueueTypeId, bgTypeId, member->GetGUIDLow(), member->GetName().c_str());
        }
        TC_LOG_DEBUG("bg.battleground", "Battleground: group end");
    }

    sBattlegroundMgr->ScheduleQueueUpdate(0, 0, bgQueueTypeId, bgTypeId, bracketEntry->GetBracketId());
}
void WorldSession::HandleBattlemasterJoinOpcode(WorldPackets::Battleground::BattlemasterJoin& battlemasterJoin)
{
    bool isPremade = false;
    Group* grp = NULL;
    uint32 bgTypeId_ = battlemasterJoin.QueueID & 0xFFFF;
    if (!sBattlemasterListStore.LookupEntry(bgTypeId_))
    {
        TC_LOG_ERROR("network", "Battleground: invalid bgtype (%u) received. possible cheater? %s", bgTypeId_, _player->GetGUID().ToString().c_str());
        return;
    }

    if (DisableMgr::IsDisabledFor(DISABLE_TYPE_BATTLEGROUND, bgTypeId_, NULL))
    {
        ChatHandler(this).PSendSysMessage(LANG_BG_DISABLED);
        return;
    }

    BattlegroundTypeId bgTypeId = BattlegroundTypeId(bgTypeId_);

    // can do this, since it's battleground, not arena
    BattlegroundQueueTypeId bgQueueTypeId = BattlegroundMgr::BGQueueTypeId(bgTypeId, 0);
    BattlegroundQueueTypeId bgQueueTypeIdRandom = BattlegroundMgr::BGQueueTypeId(BATTLEGROUND_RB, 0);

    // ignore if player is already in BG
    if (_player->InBattleground())
        return;

    // get bg instance or bg template if instance not found
    Battleground* bg = sBattlegroundMgr->GetBattlegroundTemplate(bgTypeId);
    if (!bg)
        return;

    // expected bracket entry
    PvPDifficultyEntry const* bracketEntry = GetBattlegroundBracketByLevel(bg->GetMapId(), _player->getLevel());
    if (!bracketEntry)
        return;

    GroupJoinBattlegroundResult err = ERR_BATTLEGROUND_NONE;

    // check queue conditions
    if (!battlemasterJoin.JoinAsGroup)
    {
        if (GetPlayer()->isUsingLfg())
        {
            WorldPackets::Battleground::BattlefieldStatusFailed battlefieldStatus;
            sBattlegroundMgr->BuildBattlegroundStatusFailed(&battlefieldStatus, bg, _player, 0, 0, ERR_LFG_CANT_USE_BATTLEGROUND);
            SendPacket(battlefieldStatus.Write());
            return;
        }

        // check Deserter debuff
        if (!_player->CanJoinToBattleground(bg))
        {
            WorldPackets::Battleground::BattlefieldStatusFailed battlefieldStatus;
            sBattlegroundMgr->BuildBattlegroundStatusFailed(&battlefieldStatus, bg, _player, 0, 0, ERR_GROUP_JOIN_BATTLEGROUND_DESERTERS);
            SendPacket(battlefieldStatus.Write());
            return;
        }

        if (_player->GetBattlegroundQueueIndex(bgQueueTypeIdRandom) < PLAYER_MAX_BATTLEGROUND_QUEUES)
        {
            // player is already in random queue
            WorldPackets::Battleground::BattlefieldStatusFailed battlefieldStatus;
            sBattlegroundMgr->BuildBattlegroundStatusFailed(&battlefieldStatus, bg, _player, 0, 0, ERR_IN_RANDOM_BG);
            SendPacket(battlefieldStatus.Write());
            return;
        }

        if (_player->InBattlegroundQueue() && bgTypeId == BATTLEGROUND_RB)
        {
            // player is already in queue, can't start random queue
            WorldPackets::Battleground::BattlefieldStatusFailed battlefieldStatus;
            sBattlegroundMgr->BuildBattlegroundStatusFailed(&battlefieldStatus, bg, _player, 0, 0, ERR_IN_NON_RANDOM_BG);
            SendPacket(battlefieldStatus.Write());
            return;
        }

        // check if already in queue
        if (_player->GetBattlegroundQueueIndex(bgQueueTypeId) < PLAYER_MAX_BATTLEGROUND_QUEUES)
            // player is already in this queue
            return;

        // check if has free queue slots
        if (!_player->HasFreeBattlegroundQueueId())
        {
            WorldPackets::Battleground::BattlefieldStatusFailed battlefieldStatus;
            sBattlegroundMgr->BuildBattlegroundStatusFailed(&battlefieldStatus, bg, _player, 0, 0, ERR_BATTLEGROUND_TOO_MANY_QUEUES);
            SendPacket(battlefieldStatus.Write());
            return;
        }

        // check Freeze debuff
        if (_player->HasAura(9454))
            return;

        BattlegroundQueue& bgQueue = sBattlegroundMgr->GetBattlegroundQueue(bgQueueTypeId);
        GroupQueueInfo* ginfo = bgQueue.AddGroup(_player, NULL, bgTypeId, bracketEntry, 0, false, isPremade, 0, 0);

        uint32 avgTime = bgQueue.GetAverageQueueWaitTime(ginfo, bracketEntry->GetBracketId());
        uint32 queueSlot = _player->AddBattlegroundQueueId(bgQueueTypeId);

        WorldPackets::Battleground::BattlefieldStatusQueued battlefieldStatus;
        sBattlegroundMgr->BuildBattlegroundStatusQueued(&battlefieldStatus, bg, _player, queueSlot, ginfo->JoinTime, avgTime, ginfo->ArenaType, false);
        SendPacket(battlefieldStatus.Write());

        TC_LOG_DEBUG("bg.battleground", "Battleground: player joined queue for bg queue type %u bg type %u, %s, NAME %s",
            bgQueueTypeId, bgTypeId, _player->GetGUID().ToString().c_str(), _player->GetName().c_str());
    }
    else
    {
        grp = _player->GetGroup();

        if (!grp)
            return;

        if (grp->GetLeaderGUID() != _player->GetGUID())
            return;

        ObjectGuid errorGuid;
        err = grp->CanJoinBattlegroundQueue(bg, bgQueueTypeId, 0, bg->GetMaxPlayersPerTeam(), false, 0, errorGuid);
        isPremade = (grp->GetMembersCount() >= bg->GetMinPlayersPerTeam());

        BattlegroundQueue& bgQueue = sBattlegroundMgr->GetBattlegroundQueue(bgQueueTypeId);
        GroupQueueInfo* ginfo = NULL;
        uint32 avgTime = 0;

        if (!err)
        {
            TC_LOG_DEBUG("bg.battleground", "Battleground: the following players are joining as group:");
            ginfo = bgQueue.AddGroup(_player, grp, bgTypeId, bracketEntry, 0, false, isPremade, 0, 0);
            avgTime = bgQueue.GetAverageQueueWaitTime(ginfo, bracketEntry->GetBracketId());
        }

        for (GroupReference* itr = grp->GetFirstMember(); itr != NULL; itr = itr->next())
        {
            Player* member = itr->GetSource();
            if (!member)
                continue;   // this should never happen

            if (err)
            {
                WorldPackets::Battleground::BattlefieldStatusFailed battlefieldStatus;
                sBattlegroundMgr->BuildBattlegroundStatusFailed(&battlefieldStatus, bg, _player, 0, 0, err, &errorGuid);
                member->SendDirectMessage(battlefieldStatus.Write());
                continue;
            }

            // add to queue
            uint32 queueSlot = member->AddBattlegroundQueueId(bgQueueTypeId);

            WorldPackets::Battleground::BattlefieldStatusQueued battlefieldStatus;
            sBattlegroundMgr->BuildBattlegroundStatusQueued(&battlefieldStatus, bg, member, queueSlot, ginfo->JoinTime, avgTime, ginfo->ArenaType, true);
            member->SendDirectMessage(battlefieldStatus.Write());
            TC_LOG_DEBUG("bg.battleground", "Battleground: player joined queue for bg queue type %u bg type %u, %s, NAME %s",
                bgQueueTypeId, bgTypeId, member->GetGUID().ToString().c_str(), member->GetName().c_str());
        }
        TC_LOG_DEBUG("bg.battleground", "Battleground: group end");
    }

    sBattlegroundMgr->ScheduleQueueUpdate(0, 0, bgQueueTypeId, bgTypeId, bracketEntry->GetBracketId());
}
void WorldSession::HandleBattlemasterJoinOpcode(WorldPacket & recv_data)
{
    uint64 guid;
    uint32 bgTypeId_;
    uint32 instanceId;
    uint8 joinAsGroup;
    bool isPremade = false;
    Group* grp = NULL;

    recv_data >> guid;                                      // battlemaster guid
    recv_data >> bgTypeId_;                                 // battleground type id (DBC id)
    recv_data >> instanceId;                                // instance id, 0 if First Available selected
    recv_data >> joinAsGroup;                               // join as group

    if (!sBattlemasterListStore.LookupEntry(bgTypeId_))
    {
        sLog->outError("Battleground: invalid bgtype (%u) received. possible cheater? player guid %u", bgTypeId_, _player->GetGUIDLow());
        return;
    }

    if (DisableMgr::IsDisabledFor(DISABLE_TYPE_BATTLEGROUND, bgTypeId_, NULL))
    {
        ChatHandler(this).PSendSysMessage(LANG_BG_DISABLED);
        return;
    }

    BattlegroundTypeId bgTypeId = BattlegroundTypeId(bgTypeId_);

    sLog->outDebug(LOG_FILTER_NETWORKIO, "WORLD: Recvd CMSG_BATTLEMASTER_JOIN Message from (GUID: %u TypeId:%u)", GUID_LOPART(guid), GuidHigh2TypeId(GUID_HIPART(guid)));

    // can do this since it's battleground
    BattlegroundQueueTypeId bgQueueTypeId = BattlegroundMgr::BGQueueTypeId(bgTypeId);

    // ignore if player is already in BG
    if (_player->InBattleground())
        return;

    // get bg instance or bg template if instance not found
    Battleground* bg = NULL;
    if (instanceId)
        bg = sBattlegroundMgr->GetBattlegroundThroughClientInstance(instanceId, bgTypeId);

    if (!bg)
        bg = sBattlegroundMgr->GetBattlegroundTemplate(bgTypeId);
    if (!bg)
        return;

    // expected bracket entry
    PvPDifficultyEntry const* bracketEntry = GetBattlegroundBracketByLevel(bg->GetMapId(), _player->getLevel());
    if (!bracketEntry)
        return;

    GroupJoinBattlegroundResult err;

    // check queue conditions
    if (!joinAsGroup)
    {
        // check Deserter debuff
        if (!_player->CanJoinToBattleground())
        {
            WorldPacket data;
            sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, ERR_GROUP_JOIN_BATTLEGROUND_DESERTERS);
            _player->GetSession()->SendPacket(&data);
            return;
        }

        // check if already in queue
        if (_player->GetBattlegroundQueueIndex(bgQueueTypeId) < PLAYER_MAX_BATTLEGROUND_QUEUES)
            return;

        // check if has free queue slots
        if (!_player->HasFreeBattlegroundQueueId())
        {
            WorldPacket data;
            sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, ERR_BATTLEGROUND_TOO_MANY_QUEUES);
            _player->GetSession()->SendPacket(&data);
            return;
        }

        BattlegroundQueue& bgQueue = sBattlegroundMgr->m_BattlegroundQueues[bgQueueTypeId];

        GroupQueueInfo* ginfo = bgQueue.AddGroup(_player, NULL, bgTypeId, bracketEntry, isPremade);
        uint32 avgTime = bgQueue.GetAverageQueueWaitTime(ginfo, bracketEntry->GetBracketId());
        // already checked if queueSlot is valid, now just get it
        uint32 queueSlot = _player->AddBattlegroundQueueId(bgQueueTypeId);

        WorldPacket data;
                                                            // send status packet (in queue)
        sBattlegroundMgr->BuildBattlegroundStatusPacket(&data, bg, queueSlot, STATUS_WAIT_QUEUE, avgTime, 0);
        SendPacket(&data);
        sLog->outDebug(LOG_FILTER_BATTLEGROUND, "Battleground: player joined queue for bg queue type %u bg type %u: GUID %u, NAME %s", bgQueueTypeId, bgTypeId, _player->GetGUIDLow(), _player->GetName());
    }
    else
    {
        grp = _player->GetGroup();
        // no group found, error
        if (!grp)
            return;
        if (grp->GetLeaderGUID() != _player->GetGUID())
            return;
        err = grp->CanJoinBattlegroundQueue(bg, bgQueueTypeId, 0, bg->GetMaxPlayersPerTeam());
        isPremade = (grp->GetMembersCount() >= bg->GetMinPlayersPerTeam());

        BattlegroundQueue& bgQueue = sBattlegroundMgr->m_BattlegroundQueues[bgQueueTypeId];
        GroupQueueInfo* ginfo = NULL;
        uint32 avgTime = 0;

        if (err > 0)
        {
            sLog->outDebug(LOG_FILTER_BATTLEGROUND, "Battleground: the following players are joining as group:");
            ginfo = bgQueue.AddGroup(_player, grp, bgTypeId, bracketEntry, isPremade);
            avgTime = bgQueue.GetAverageQueueWaitTime(ginfo, bracketEntry->GetBracketId());
        }

        for (GroupReference* itr = grp->GetFirstMember(); itr != NULL; itr = itr->next())
        {
            Player* member = itr->getSource();
            if (!member)
                continue;   // this should never happen

            WorldPacket data;

            if (err <= 0)
            {
                sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, err);
                member->GetSession()->SendPacket(&data);
                continue;
            }

            // add to queue
            uint32 queueSlot = member->AddBattlegroundQueueId(bgQueueTypeId);

            // send status packet (in queue)
            sBattlegroundMgr->BuildBattlegroundStatusPacket(&data, bg, queueSlot, STATUS_WAIT_QUEUE, avgTime, 0);
            member->GetSession()->SendPacket(&data);
            sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, err);
            member->GetSession()->SendPacket(&data);
            sLog->outDebug(LOG_FILTER_BATTLEGROUND, "Battleground: player joined queue for bg queue type %u bg type %u: GUID %u, NAME %s", bgQueueTypeId, bgTypeId, member->GetGUIDLow(), member->GetName());
        }
        sLog->outDebug(LOG_FILTER_BATTLEGROUND, "Battleground: group end");

    }
    sBattlegroundMgr->ScheduleQueueUpdate(bgQueueTypeId, bgTypeId, bracketEntry->GetBracketId());
}
void WorldSession::HandleBattlemasterJoinOpcode(WorldPacket & recvData)
{
    uint64 guid;
    uint32 bgTypeId_;
    uint32 instanceId;                                     // sent to queue for particular bg from battlemaster's list, currently not used
    uint8 joinAsGroup;

    recvData >> guid;                                      // battlemaster guid
    recvData >> bgTypeId_;                                 // battleground type id (DBC id)
    recvData >> instanceId;                                // instance id, 0 if First Available selected
    recvData >> joinAsGroup;                               // join as group

	// entry not found
    if (!sBattlemasterListStore.LookupEntry(bgTypeId_))
        return;

	// chosen battleground type is disabled
    if (DisableMgr::IsDisabledFor(DISABLE_TYPE_BATTLEGROUND, bgTypeId_, NULL))
    {
        ChatHandler(this).PSendSysMessage(LANG_BG_DISABLED);
        return;
    }

	// get queue typeid and random typeid to check if already queued for them
    BattlegroundTypeId bgTypeId = BattlegroundTypeId(bgTypeId_);
    BattlegroundQueueTypeId bgQueueTypeId = BattlegroundMgr::BGQueueTypeId(bgTypeId, 0);
    BattlegroundQueueTypeId bgQueueTypeIdRandom = BattlegroundMgr::BGQueueTypeId(BATTLEGROUND_RB, 0);

	// safety check - bgQueueTypeId == BATTLEGROUND_QUEUE_NONE if tried to queue for arena using this function
	if (bgQueueTypeId == BATTLEGROUND_QUEUE_NONE)
		return;

    // get bg template
    Battleground* bgt = sBattlegroundMgr->GetBattlegroundTemplate(bgTypeId);
    if (!bgt)
        return;

    // expected bracket entry
    PvPDifficultyEntry const* bracketEntry = GetBattlegroundBracketByLevel(bgt->GetMapId(), _player->getLevel());
    if (!bracketEntry)
        return;

	// pussywizard: if trying to queue for already queued
	// just remove from queue and it will requeue!
	uint32 qSlot = _player->GetBattlegroundQueueIndex(bgQueueTypeId);
	if (qSlot < PLAYER_MAX_BATTLEGROUND_QUEUES)
	{
		BattlegroundQueue& bgQueue = sBattlegroundMgr->GetBattlegroundQueue(bgQueueTypeId);

		if (bgQueue.IsPlayerInvitedToRatedArena(_player->GetGUID()))
		{
			WorldPacket data;
			sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, ERR_BATTLEGROUND_JOIN_FAILED);
			SendPacket(&data);
			return;
		}

		bgQueue.RemovePlayer(_player->GetGUID(), false, qSlot);
		_player->RemoveBattlegroundQueueId(bgQueueTypeId);
	}

	// must have free queue slot
	if (!_player->HasFreeBattlegroundQueueId())
	{
        WorldPacket data;
        sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, ERR_BATTLEGROUND_TOO_MANY_QUEUES);
        SendPacket(&data);
        return;
	}

	// queue result (default ok)
	GroupJoinBattlegroundResult err = GroupJoinBattlegroundResult(bgt->GetBgTypeID());

    // check if player can queue:
    if (!joinAsGroup)
    {
		if (GetPlayer()->InBattleground()) // currently in battleground
            err = ERR_BATTLEGROUND_NOT_IN_BATTLEGROUND;
		else if (GetPlayer()->isUsingLfg()) // using lfg system
            err = ERR_LFG_CANT_USE_BATTLEGROUND;
		else if (!_player->CanJoinToBattleground()) // has deserter debuff
            err = ERR_GROUP_JOIN_BATTLEGROUND_DESERTERS;
		else if (_player->InBattlegroundQueueForBattlegroundQueueType(bgQueueTypeIdRandom)) // queued for random bg, so can't queue for anything else
            err = ERR_IN_RANDOM_BG;
		else if (_player->InBattlegroundQueue() && bgTypeId == BATTLEGROUND_RB) // already in queue, so can't queue for random
            err = ERR_IN_NON_RANDOM_BG;
		else if (_player->InBattlegroundQueueForBattlegroundQueueType(BATTLEGROUND_QUEUE_2v2) ||
				 _player->InBattlegroundQueueForBattlegroundQueueType(BATTLEGROUND_QUEUE_3v3) ||
				 _player->InBattlegroundQueueForBattlegroundQueueType(BATTLEGROUND_QUEUE_5v5)) // can't be already queued for arenas
			err = ERR_BATTLEGROUND_QUEUED_FOR_RATED;

		if (err <= 0)
		{
            WorldPacket data;
            sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, err);
            SendPacket(&data);
            return;
		}

        BattlegroundQueue& bgQueue = sBattlegroundMgr->GetBattlegroundQueue(bgQueueTypeId);
        GroupQueueInfo* ginfo = bgQueue.AddGroup(_player, NULL, bracketEntry, false, false, 0, 0, 0);
        uint32 avgWaitTime = bgQueue.GetAverageQueueWaitTime(ginfo);

        uint32 queueSlot = _player->AddBattlegroundQueueId(bgQueueTypeId);

		// send status packet
        WorldPacket data;
        sBattlegroundMgr->BuildBattlegroundStatusPacket(&data, bgt, queueSlot, STATUS_WAIT_QUEUE, avgWaitTime, 0, 0, TEAM_NEUTRAL);
        SendPacket(&data);
    }
	// check if group can queue:
    else
    {
        Group* grp = _player->GetGroup();
        // no group or not a leader
        if (!grp || grp->GetLeaderGUID() != _player->GetGUID())
            return;

		// pussywizard: for party members - remove queues for which leader is not queued to!
		std::set<uint32> leaderQueueTypeIds;
		for (uint32 i=0; i<PLAYER_MAX_BATTLEGROUND_QUEUES; ++i)
			leaderQueueTypeIds.insert((uint32)_player->GetBattlegroundQueueTypeId(i));
		for (GroupReference* itr = grp->GetFirstMember(); itr != NULL; itr = itr->next())
			if (Player* member = itr->GetSource())
				for (uint32 i=0; i<PLAYER_MAX_BATTLEGROUND_QUEUES; ++i)
					if (BattlegroundQueueTypeId mqtid = member->GetBattlegroundQueueTypeId(i))
						if (leaderQueueTypeIds.count((uint32)mqtid) == 0)
						{
							BattlegroundQueue& bgQueue = sBattlegroundMgr->GetBattlegroundQueue(mqtid);

							if (bgQueue.IsPlayerInvitedToRatedArena(member->GetGUID()))
							{
								WorldPacket data;
								sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, ERR_BATTLEGROUND_JOIN_FAILED);
								SendPacket(&data);
								return;
							}

							bgQueue.RemovePlayer(member->GetGUID(), false, i);
							member->RemoveBattlegroundQueueId(mqtid);
						}

		if (_player->InBattlegroundQueueForBattlegroundQueueType(bgQueueTypeIdRandom)) // queued for random bg, so can't queue for anything else
            err = ERR_IN_RANDOM_BG;
		else if (_player->InBattlegroundQueue() && bgTypeId == BATTLEGROUND_RB) // already in queue, so can't queue for random
            err = ERR_IN_NON_RANDOM_BG;
		else if (_player->InBattlegroundQueueForBattlegroundQueueType(BATTLEGROUND_QUEUE_2v2) ||
				 _player->InBattlegroundQueueForBattlegroundQueueType(BATTLEGROUND_QUEUE_3v3) ||
				 _player->InBattlegroundQueueForBattlegroundQueueType(BATTLEGROUND_QUEUE_5v5)) // can't be already queued for arenas
			err = ERR_BATTLEGROUND_QUEUED_FOR_RATED;

		if (err > 0)
			err = grp->CanJoinBattlegroundQueue(bgt, bgQueueTypeId, 0, bgt->GetMaxPlayersPerTeam(), false, 0);

        bool isPremade = (grp->GetMembersCount() >= bgt->GetMinPlayersPerTeam() && bgTypeId != BATTLEGROUND_RB);
        uint32 avgWaitTime = 0;

        if (err > 0)
        {
			BattlegroundQueue& bgQueue = sBattlegroundMgr->GetBattlegroundQueue(bgQueueTypeId);
            GroupQueueInfo* ginfo = bgQueue.AddGroup(_player, grp, bracketEntry, false, isPremade, 0, 0, 0);
            avgWaitTime = bgQueue.GetAverageQueueWaitTime(ginfo);
        }

        WorldPacket data;
        for (GroupReference* itr = grp->GetFirstMember(); itr != NULL; itr = itr->next())
        {
            Player* member = itr->GetSource();
            if (!member)
                continue;

            if (err <= 0)
            {
                sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, err);
                member->GetSession()->SendPacket(&data);
                continue;
            }

            uint32 queueSlot = member->AddBattlegroundQueueId(bgQueueTypeId);

            // send status packet
            sBattlegroundMgr->BuildBattlegroundStatusPacket(&data, bgt, queueSlot, STATUS_WAIT_QUEUE, avgWaitTime, 0, 0, TEAM_NEUTRAL);
            member->GetSession()->SendPacket(&data);

            sBattlegroundMgr->BuildGroupJoinedBattlegroundPacket(&data, err);
            member->GetSession()->SendPacket(&data);
        }
    }
}
void WorldSession::HandleBattlegroundJoinOpcode(WorldPacket& recv_data)
{
    uint64 guid;
    uint32 bgTypeId;
    uint32 instanceId;
    uint8 joinAsGroup;
    Group* grp;

    recv_data >> guid;                                      // battlemaster guid
    recv_data >> bgTypeId;                                  // battleground type id (DBC id)
    recv_data >> instanceId;                                // instance id, 0 if First Available selected
    recv_data >> joinAsGroup;                               // join as group

    if (bgTypeId >= MAX_BATTLEGROUND_TYPES)
    {
        sLog.outError("Battleground: invalid bgtype received. possible cheater? player guid %u", _player->GetGUIDLow());
        return;
    }

    if (sDisableMgr.IsDisabledFor(DISABLE_TYPE_BATTLEGROUND, bgTypeId, NULL))
    {
        ChatHandler(this).PSendSysMessage(LANG_BG_DISABLED);
        return;
    }

    sLog.outDebug("WORLD: Recvd CMSG_BATTLEMASTER_JOIN Message from (GUID: %u TypeId:%u)", GUID_LOPART(guid), GuidHigh2TypeId(GUID_HIPART(guid)));

    // can do this, since it's battleground, not arena
    uint32 bgQueueTypeId = sBattlegroundMgr.BGQueueTypeId(bgTypeId, 0);

    // ignore if player is already in BG
    if (_player->InBattleground())
        return;

    Creature* unit = GetPlayer()->GetMap()->GetCreature(guid);
    if (!unit)
        return;

    if (!unit->IsBattleMaster())                             // it's not battlemaster
        return;

    // get bg instance or bg template if instance not found
    Battleground* bg = NULL;
    if (instanceId)
        bg = sBattlegroundMgr.GetBattleground(instanceId);

    if (!bg && !(bg = sBattlegroundMgr.GetBattlegroundTemplate(bgTypeId)))
    {
        sLog.outError("Battleground: no available bg / template found");
        return;
    }

    // check queueing conditions
    if (!joinAsGroup)
    {
        // check Deserter debuff
        if (!_player->CanJoinToBattleground())
        {
            WorldPacket data(SMSG_GROUP_JOINED_BATTLEGROUND, 4);
            data << (uint32) 0xFFFFFFFE;
            _player->GetSession()->SendPacket(&data);
            return;
        }
        // check if already in queue
        if (_player->GetBattlegroundQueueIndex(bgQueueTypeId) < PLAYER_MAX_BATTLEGROUND_QUEUES)
            //player is already in this queue
            return;
        // check if has free queue slots
        if (!_player->HasFreeBattlegroundQueueId())
            return;
    }
    else
    {
        grp = _player->GetGroup();
        // no group found, error
        if (!grp)
            return;
        uint32 err = grp->CanJoinBattlegroundQueue(bgTypeId, bgQueueTypeId, 0, bg->GetMaxPlayersPerTeam(), false, 0);
        if (err != BG_JOIN_ERR_OK)
        {
            SendBattlegroundOrArenaJoinError(err);
            return;
        }
    }
    // if we're here, then the conditions to join a bg are met. We can proceed in joining.

    // _player->GetGroup() was already checked, grp is already initialized
    if (joinAsGroup /* && _player->GetGroup()*/)
    {
        sLog.outDebug("Battleground: the following players are joining as group:");
        GroupQueueInfo* ginfo = sBattlegroundMgr.m_BattlegroundQueues[bgQueueTypeId].AddGroup(_player, bgTypeId, 0, false, 0);
        for (GroupReference* itr = grp->GetFirstMember(); itr != NULL; itr = itr->next())
        {
            Player* member = itr->GetSource();
            if (!member) continue;   // this should never happen

            uint32 queueSlot = member->AddBattlegroundQueueId(bgQueueTypeId);           // add to queue

            // store entry point coords (same as leader entry point)
            if (!sWorld.getConfig(CONFIG_BATTLEGROUND_WRATH_LEAVE_MODE))
                member->SetBattlegroundEntryPoint(_player->GetMapId(), _player->GetPositionX(), _player->GetPositionY(), _player->GetPositionZ(), _player->GetOrientation());

            WorldPacket data;
            // send status packet (in queue)
            sBattlegroundMgr.BuildBattlegroundStatusPacket(&data, bg, member->GetTeam(), queueSlot, STATUS_WAIT_QUEUE, 0, 0);
            member->GetSession()->SendPacket(&data);
            sBattlegroundMgr.BuildGroupJoinedBattlegroundPacket(&data, bgTypeId);
            member->GetSession()->SendPacket(&data);
            sBattlegroundMgr.m_BattlegroundQueues[bgQueueTypeId].AddPlayer(member, ginfo);
            sLog.outDebug("Battleground: player joined queue for bg queue type %u bg type %u: GUID %u, NAME %s", bgQueueTypeId, bgTypeId, member->GetGUIDLow(), member->GetName());
        }
        sLog.outDebug("Battleground: group end");
        sBattlegroundMgr.m_BattlegroundQueues[bgQueueTypeId].Update(bgTypeId, _player->GetBattlegroundQueueIdFromLevel());
    }
    else
    {
        // already checked if queueSlot is valid, now just get it
        uint32 queueSlot = _player->AddBattlegroundQueueId(bgQueueTypeId);
        // store entry point coords
        if (!sWorld.getConfig(CONFIG_BATTLEGROUND_WRATH_LEAVE_MODE))
            _player->SetBattlegroundEntryPoint(_player->GetMapId(), _player->GetPositionX(), _player->GetPositionY(), _player->GetPositionZ(), _player->GetOrientation());

        WorldPacket data;
        // send status packet (in queue)
        sBattlegroundMgr.BuildBattlegroundStatusPacket(&data, bg, _player->GetTeam(), queueSlot, STATUS_WAIT_QUEUE, 0, 0);
        SendPacket(&data);

        GroupQueueInfo* ginfo = sBattlegroundMgr.m_BattlegroundQueues[bgQueueTypeId].AddGroup(_player, bgTypeId, 0, false, 0);
        sBattlegroundMgr.m_BattlegroundQueues[bgQueueTypeId].AddPlayer(_player, ginfo);
        sBattlegroundMgr.m_BattlegroundQueues[bgQueueTypeId].Update(bgTypeId, _player->GetBattlegroundQueueIdFromLevel());
        sLog.outDebug("Battleground: player joined queue for bg queue type %u bg type %u: GUID %u, NAME %s", bgQueueTypeId, bgTypeId, _player->GetGUIDLow(), _player->GetName());
    }
}