SpellHandler.cpp

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/*
 * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "WorldSession.h"
#include "Common.h"
#include "Config.h"
#include "DatabaseEnv.h"
#include "Log.h"
#include "DBCStores.h"
#include "GameClient.h"
#include "GameObject.h"
#include "GameObjectAI.h"
#include "GameObjectPackets.h"
#include "Item.h"
#include "MovementPackets.h"
#include "ObjectAccessor.h"
#include "ObjectMgr.h"
#include "Opcodes.h"
#include "Player.h"
#include "ScriptMgr.h"
#include "Spell.h"
#include "SpellAuraEffects.h"
#include "SpellMgr.h"
#include "SpellPackets.h"
#include "Totem.h"
#include "TotemPackets.h"
#include "World.h"
#include "WorldPacket.h"
 
void WorldSession::HandleClientCastFlags(WorldPacket& recvPacket, uint8 castFlags, SpellCastTargets& targets)
{
    // some spell cast packet including more data (for projectiles?)
    if (castFlags & 0x02)
    {
        // not sure about these two
        float elevation, speed;
        recvPacket >> elevation;
        recvPacket >> speed;
 
        targets.SetPitch(elevation);
        targets.SetSpeed(speed);
 
        uint8 hasMovementData;
        recvPacket >> hasMovementData;
        if (hasMovementData)
        {
            OpcodeClient opcode = static_cast<OpcodeClient>(recvPacket.read<uint32>());
            MovementInfo movementInfo;
            recvPacket >> movementInfo.guid.ReadAsPacked();
            recvPacket >> movementInfo;
            HandleMovementOpcode(opcode, movementInfo);
        }
    }
}
 
void WorldSession::HandleUseItemOpcode(WorldPacket& recvPacket)
{
    Player* pUser = _player;
 
    uint8 bagIndex, slot, castFlags;
    uint8 castCount;                                        // next cast if exists (single or not)
    ObjectGuid itemGUID;
    uint32 glyphIndex;                                      // something to do with glyphs?
    uint32 spellId;                                         // cast spell id
 
    recvPacket >> bagIndex >> slot >> castCount >> spellId >> itemGUID >> glyphIndex >> castFlags;
 
    if (glyphIndex >= MAX_GLYPH_SLOT_INDEX)
    {
        pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, nullptr, nullptr);
        return;
    }
 
    Item* pItem = pUser->GetUseableItemByPos(bagIndex, slot);
    if (!pItem)
    {
        pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, nullptr, nullptr);
        return;
    }
 
    if (pItem->GetGUID() != itemGUID)
    {
        pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, nullptr, nullptr);
        return;
    }
 
    TC_LOG_DEBUG("network", "WORLD: CMSG_USE_ITEM packet, bagIndex: {}, slot: {}, castCount: {}, spellId: {}, Item: {}, glyphIndex: {}, data length = {}", bagIndex, slot, castCount, spellId, pItem->GetEntry(), glyphIndex, (uint32)recvPacket.size());
 
    ItemTemplate const* proto = pItem->GetTemplate();
    if (!proto)
    {
        pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, pItem, nullptr);
        return;
    }
 
    // some item classes can be used only in equipped state
    if (proto->GetInventoryType() != INVTYPE_NON_EQUIP && !pItem->IsEquipped())
    {
        pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, pItem, nullptr);
        return;
    }
 
    InventoryResult msg = pUser->CanUseItem(pItem);
    if (msg != EQUIP_ERR_OK)
    {
        pUser->SendEquipError(msg, pItem, nullptr);
        return;
    }
 
    // only allow conjured consumable, bandage, poisons (all should have the 2^21 item flag set in DB)
    if (proto->GetClass() == ITEM_CLASS_CONSUMABLE && !proto->HasFlag(ITEM_FLAG_IGNORE_DEFAULT_ARENA_RESTRICTIONS) && pUser->InArena())
    {
        pUser->SendEquipError(EQUIP_ERR_NOT_DURING_ARENA_MATCH, pItem, nullptr);
        return;
    }
 
    // don't allow items banned in arena
    if (proto->HasFlag(ITEM_FLAG_NOT_USEABLE_IN_ARENA) && pUser->InArena())
    {
        pUser->SendEquipError(EQUIP_ERR_NOT_DURING_ARENA_MATCH, pItem, nullptr);
        return;
    }
 
    if (pUser->IsInCombat())
    {
        for (ItemEffect const& effectData : proto->Effects)
        {
            if (SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(effectData.SpellID))
            {
                if (!spellInfo->CanBeUsedInCombat())
                {
                    pUser->SendEquipError(EQUIP_ERR_NOT_IN_COMBAT, pItem, nullptr);
                    return;
                }
            }
        }
    }
 
    // check also  BIND_WHEN_PICKED_UP and BIND_QUEST_ITEM for .additem or .additemset case by GM (not binded at adding to inventory)
    if (pItem->GetTemplate()->GetBonding() == BIND_WHEN_USE || pItem->GetTemplate()->GetBonding() == BIND_WHEN_PICKED_UP || pItem->GetTemplate()->GetBonding() == BIND_QUEST_ITEM)
    {
        if (!pItem->IsSoulBound())
        {
            pItem->SetState(ITEM_CHANGED, pUser);
            pItem->SetBinding(true);
        }
    }
 
    SpellCastTargets targets;
    targets.Read(recvPacket, pUser);
    HandleClientCastFlags(recvPacket, castFlags, targets);
 
    // Note: If script stop casting it must send appropriate data to client to prevent stuck item in gray state.
    if (!sScriptMgr->OnItemUse(pUser, pItem, targets))
    {
        // no script or script not process request by self
        pUser->CastItemUseSpell(pItem, spellId, targets, castCount, glyphIndex);
    }
}
 
void WorldSession::HandleOpenItemOpcode(WorldPacket& recvPacket)
{
    TC_LOG_DEBUG("network", "WORLD: CMSG_OPEN_ITEM packet, data length = {}", (uint32)recvPacket.size());
 
    Player* player = GetPlayer();
 
    // ignore for remote control state
    if (player->IsCharmed())
        return;
 
    // additional check, client outputs message on its own
    if (!player->IsAlive())
    {
        player->SendEquipError(EQUIP_ERR_PLAYER_DEAD, nullptr, nullptr);
        return;
    }
 
    uint8 bagIndex, slot;
    recvPacket >> bagIndex >> slot;
 
    TC_LOG_INFO("network", "bagIndex: {}, slot: {}", bagIndex, slot);
 
    Item* item = player->GetItemByPos(bagIndex, slot);
    if (!item)
    {
        player->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, nullptr, nullptr);
        return;
    }
 
    ItemTemplate const* proto = item->GetTemplate();
    if (!proto)
    {
        player->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, item, nullptr);
        return;
    }
 
    // Verify that the bag is an actual bag or wrapped item that can be used "normally"
    if (!proto->HasFlag(ITEM_FLAG_HAS_LOOT) && !item->IsWrapped())
    {
        player->SendEquipError(EQUIP_ERR_CLIENT_LOCKED_OUT, item, nullptr);
        TC_LOG_ERROR("entities.player.cheat", "Possible hacking attempt: Player {} {} tried to open item [{}, entry: {}] which is not openable!",
            player->GetName(), player->GetGUID().ToString(), item->GetGUID().ToString(), proto->GetId());
        return;
    }
 
    // locked item
    uint32 lockId = proto->GetLockID();
    if (lockId)
    {
        LockEntry const* lockInfo = sLockStore.LookupEntry(lockId);
 
        if (!lockInfo)
        {
            player->SendEquipError(EQUIP_ERR_ITEM_LOCKED, item, nullptr);
            TC_LOG_ERROR("network", "WORLD::OpenItem: item {} has an unknown lockId: {}!", item->GetGUID().ToString(), lockId);
            return;
        }
 
        // was not unlocked yet
        if (item->IsLocked())
        {
            player->SendEquipError(EQUIP_ERR_ITEM_LOCKED, item, nullptr);
            return;
        }
    }
 
    if (item->IsWrapped())
    {
        CharacterDatabasePreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(CHAR_SEL_CHARACTER_GIFT_BY_ITEM);
        stmt->setUInt32(0, item->GetGUID().GetCounter());
        _queryProcessor.AddCallback(CharacterDatabase.AsyncQuery(stmt)
            .WithPreparedCallback(std::bind(&WorldSession::HandleOpenWrappedItemCallback, this, item->GetPos(), item->GetGUID(), std::placeholders::_1)));
    }
    else
        player->SendLoot(item->GetGUID(), LOOT_CORPSE);
}
 
void WorldSession::HandleOpenWrappedItemCallback(uint16 pos, ObjectGuid itemGuid, PreparedQueryResult result)
{
    if (!GetPlayer())
        return;
 
    Item* item = GetPlayer()->GetItemByPos(pos);
    if (!item)
        return;
 
    if (item->GetGUID() != itemGuid || !item->IsWrapped()) // during getting result, gift was swapped with another item
        return;
 
    if (!result)
    {
        TC_LOG_ERROR("network", "Wrapped item {} does't have record in character_gifts table and will deleted", itemGuid.ToString());
        GetPlayer()->DestroyItem(item->GetBagSlot(), item->GetSlot(), true);
        return;
    }
 
    CharacterDatabaseTransaction trans = CharacterDatabase.BeginTransaction();
 
    Field* fields = result->Fetch();
    uint32 entry = fields[0].GetUInt32();
    uint32 flags = fields[1].GetUInt32();
 
    item->SetGiftCreator(ObjectGuid::Empty);
    item->SetEntry(entry);
    item->ReplaceAllItemFlags(ItemFieldFlags(flags));
    item->SetMaxDurability(item->GetTemplate()->MaxDurability);
    item->SetState(ITEM_CHANGED, GetPlayer());
 
    GetPlayer()->SaveInventoryAndGoldToDB(trans);
 
    CharacterDatabasePreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(CHAR_DEL_GIFT);
    stmt->setUInt32(0, itemGuid.GetCounter());
    trans->Append(stmt);
 
    CharacterDatabase.CommitTransaction(trans);
}
 
void WorldSession::HandleGameObjectUseOpcode(WorldPackets::GameObject::GameObjUse& packet)
{
    if (GameObject* obj = GetPlayer()->GetGameObjectIfCanInteractWith(packet.Guid))
    {
        // ignore for remote control state
        if (GetPlayer()->IsCharmed())
            if (!(GetPlayer()->IsOnVehicle(GetPlayer()->GetCharmed()) || GetPlayer()->IsMounted()) && !obj->GetGOInfo()->IsUsableMounted())
                return;
 
        obj->Use(GetPlayer());
    }
}
 
void WorldSession::HandleGameobjectReportUse(WorldPackets::GameObject::GameObjReportUse& packet)
{
    // ignore for remote control state
    if (_player->IsCharmed())
        return;
 
    if (GameObject* go = GetPlayer()->GetGameObjectIfCanInteractWith(packet.Guid))
    {
        if (go->AI()->OnReportUse(_player))
            return;
 
        _player->UpdateAchievementCriteria(ACHIEVEMENT_CRITERIA_TYPE_USE_GAMEOBJECT, go->GetEntry());
    }
}
 
void WorldSession::HandleCastSpellOpcode(WorldPackets::Spells::CastSpell& castRequest)
{
    SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(castRequest.Cast.SpellID);
    if (!spellInfo)
    {
        TC_LOG_ERROR("network", "WorldSession::HandleCastSpellOpcode: attempted to cast a non-existing spell (Id: {})", castRequest.Cast.SpellID);
        return;
    }
 
    if (spellInfo->IsPassive())
        return;
 
    TriggerCastFlags triggerFlag = TRIGGERED_NONE;
 
    // client provided targets
    SpellCastTargets targets(_player, castRequest.Cast);
 
    // not have spell in spellbook
    if (!_player->HasActiveSpell(spellInfo->Id))
    {
        bool allow = false;
 
        // allow casting of unknown spells for special lock cases
        if (GameObject* go = targets.GetGOTarget())
            if (go->GetSpellForLock(_player) == spellInfo)
                allow = true;
 
        // allow casting of spells triggered by clientside periodic trigger auras
        if (_player->HasAuraTypeWithTriggerSpell(SPELL_AURA_PERIODIC_TRIGGER_SPELL_FROM_CLIENT, spellInfo->Id))
        {
            allow = true;
            triggerFlag = TRIGGERED_FULL_MASK;
        }
 
        if (!allow)
            return;
    }
 
    // Client is resending autoshot cast opcode when other spell is cast during shoot rotation
    // Skip it to prevent "interrupt" message
    // Also check targets! target may have changed and we need to interrupt current spell
    if (spellInfo->IsAutoRepeatRangedSpell())
        if (Spell* spell = _player->GetCurrentSpell(CURRENT_AUTOREPEAT_SPELL))
            if (spell->m_spellInfo == spellInfo && spell->m_targets.GetUnitTargetGUID() == targets.GetUnitTargetGUID())
                return;
 
    // auto-selection buff level base at target level (in spellInfo)
    // TODO: is this even necessary? client already seems to send correct rank for "standard" buffs
    if (spellInfo->IsPositive())
        if (Unit* target = targets.GetUnitTarget())
        {
            SpellInfo const* actualSpellInfo = spellInfo->GetAuraRankForLevel(target->GetLevel());
 
            // if rank not found then function return NULL but in explicit cast case original spell can be cast and later failed with appropriate error message
            if (actualSpellInfo)
                spellInfo = actualSpellInfo;
        }
 
    if (castRequest.Cast.MissileTrajectory && castRequest.Cast.MissileTrajectory->MoveUpdate)
        HandleMovementOpcode(MSG_MOVE_STOP, *castRequest.Cast.MissileTrajectory->MoveUpdate);
 
    Spell* spell = new Spell(_player, spellInfo, triggerFlag);
    spell->m_fromClient = true;
    spell->m_cast_count = castRequest.Cast.CastID;
    spell->prepare(targets);
}
 
void WorldSession::HandleCancelCastOpcode(WorldPackets::Spells::CancelCast& cancelCast)
{
    if (_player->IsCharmed())
        return;
 
    if (_player->IsNonMeleeSpellCast(false))
        _player->InterruptNonMeleeSpells(false, cancelCast.SpellID, false);
}
 
void WorldSession::HandleCancelAuraOpcode(WorldPackets::Spells::CancelAura& cancelAura)
{
    SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(cancelAura.SpellID);
    if (!spellInfo)
        return;
 
    // not allow remove spells with attr SPELL_ATTR0_CANT_CANCEL
    if (spellInfo->HasAttribute(SPELL_ATTR0_CANT_CANCEL))
        return;
 
    // channeled spell case (it currently cast then)
    if (spellInfo->IsChanneled())
    {
        if (Spell* curSpell = _player->GetCurrentSpell(CURRENT_CHANNELED_SPELL))
            if (curSpell->GetSpellInfo()->Id == cancelAura.SpellID)
                _player->InterruptSpell(CURRENT_CHANNELED_SPELL);
        return;
    }
 
    // non channeled case:
    // don't allow remove non positive spells
    // don't allow cancelling passive auras (some of them are visible)
    if (!spellInfo->IsPositive() || spellInfo->IsPassive())
        return;
 
    _player->RemoveOwnedAura(cancelAura.SpellID, ObjectGuid::Empty, 0, AURA_REMOVE_BY_CANCEL);
 
    // If spell being removed is a resource tracker, see if player was tracking both (herbs / minerals) and remove the other
    if (sWorld->getBoolConfig(CONFIG_ALLOW_TRACK_BOTH_RESOURCES) && spellInfo->HasAura(SPELL_AURA_TRACK_RESOURCES))
    {
        Unit::AuraEffectList const& auraEffects = _player->GetAuraEffectsByType(SPELL_AURA_TRACK_RESOURCES);
        if (!auraEffects.empty())
        {
            // Build list of spell IDs to cancel. Trying to cancel the aura while iterating
            //  over AuraEffectList caused "incompatible iterator" errors on second pass
            std::list<uint32> spellIDs;
 
            for (Unit::AuraEffectList::const_iterator auraEffect = auraEffects.begin(); auraEffect != auraEffects.end(); ++auraEffect)
                spellIDs.push_back((*auraEffect)->GetId());
 
            // Remove all auras related to resource tracking (only Herbs and Minerals in 3.3.5a)
            for (std::list<uint32>::iterator it = spellIDs.begin(); it != spellIDs.end(); ++it)
                _player->RemoveOwnedAura(*it, ObjectGuid::Empty, 0, AURA_REMOVE_BY_CANCEL);
        }
    }
}
 
void WorldSession::HandlePetCancelAuraOpcode(WorldPackets::Spells::PetCancelAura& packet)
{
    SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(packet.SpellID);
    if (!spellInfo)
    {
        TC_LOG_ERROR("network", "WORLD: unknown PET spell id {}", packet.SpellID);
        return;
    }
 
    Creature* pet = ObjectAccessor::GetCreatureOrPetOrVehicle(*_player, packet.PetGUID);
 
    if (!pet)
    {
        TC_LOG_ERROR("network", "HandlePetCancelAura: Attempt to cancel an aura for non-existant {} by player '{}'", packet.PetGUID.ToString(), GetPlayer()->GetName());
        return;
    }
 
    if (pet != GetPlayer()->GetGuardianPet() && pet != GetPlayer()->GetCharmed())
    {
        TC_LOG_ERROR("network", "HandlePetCancelAura: {} is not a pet of player '{}'", packet.PetGUID.ToString(), GetPlayer()->GetName());
        return;
    }
 
    if (!pet->IsAlive())
    {
        pet->SendPetActionFeedback(PetActionFeedback::Dead, 0);
        return;
    }
 
    pet->RemoveOwnedAura(packet.SpellID, ObjectGuid::Empty, 0, AURA_REMOVE_BY_CANCEL);
}
 
void WorldSession::HandleCancelGrowthAuraOpcode(WorldPackets::Spells::CancelGrowthAura& /*cancelGrowthAura*/)
{
    _player->RemoveAurasByType(SPELL_AURA_MOD_SCALE, [](AuraApplication const* aurApp)
    {
        SpellInfo const* spellInfo = aurApp->GetBase()->GetSpellInfo();
        return !spellInfo->HasAttribute(SPELL_ATTR0_CANT_CANCEL) && spellInfo->IsPositive() && !spellInfo->IsPassive();
    });
}
 
void WorldSession::HandleCancelMountAuraOpcode(WorldPackets::Spells::CancelMountAura& /*cancelMountAura*/)
{
    _player->RemoveAurasByType(SPELL_AURA_MOUNTED, [](AuraApplication const* aurApp)
    {
        SpellInfo const* spellInfo = aurApp->GetBase()->GetSpellInfo();
        return !spellInfo->HasAttribute(SPELL_ATTR0_CANT_CANCEL) && spellInfo->IsPositive() && !spellInfo->IsPassive();
    });
}
 
void WorldSession::HandleCancelAutoRepeatSpellOpcode(WorldPackets::Spells::CancelAutoRepeatSpell& /*cancelAutoRepeatSpell*/)
{
    // may be better send SMSG_CANCEL_AUTO_REPEAT?
    // cancel and prepare for deleting
    _player->InterruptSpell(CURRENT_AUTOREPEAT_SPELL);
}
 
void WorldSession::HandleCancelChanneling(WorldPackets::Spells::CancelChannelling& cancelChanneling)
{
    Unit* mover = GetGameClient()->GetActivelyMovedUnit();
 
    // ignore for remote control state (for player case)
    if (!mover)
        return;
 
    SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(cancelChanneling.ChannelSpell);
    if (!spellInfo)
        return;
 
    // not allow remove spells with attr SPELL_ATTR0_CANT_CANCEL
    if (spellInfo->HasAttribute(SPELL_ATTR0_CANT_CANCEL))
        return;
 
    Spell* spell = mover->GetCurrentSpell(CURRENT_CHANNELED_SPELL);
    if (!spell || spell->GetSpellInfo()->Id != spellInfo->Id)
        return;
 
    mover->InterruptSpell(CURRENT_CHANNELED_SPELL);
}
 
void WorldSession::HandleTotemDestroyed(WorldPackets::Totem::TotemDestroyed& totemDestroyed)
{
    // ignore for remote control state
    if (_player->IsCharmed())
        return;
 
    uint8 slotId = totemDestroyed.Slot;
    slotId += SUMMON_SLOT_TOTEM_FIRE;
 
    if (slotId >= MAX_TOTEM_SLOT)
        return;
 
    if (!_player->m_SummonSlot[slotId])
        return;
 
    Creature* totem = ObjectAccessor::GetCreature(*_player, _player->m_SummonSlot[slotId]);
    if (totem && totem->IsTotem())
        totem->ToTotem()->UnSummon();
}
 
void WorldSession::HandleSelfResOpcode(WorldPacket & /*recvData*/)
{
    TC_LOG_DEBUG("network", "WORLD: CMSG_SELF_RES");                  // empty opcode
 
    if (SpellInfo const* spell = sSpellMgr->GetSpellInfo(_player->GetUInt32Value(PLAYER_SELF_RES_SPELL)))
    {
        if (_player->HasAuraType(SPELL_AURA_PREVENT_RESURRECTION) && !spell->HasAttribute(SPELL_ATTR7_BYPASS_NO_RESURRECT_AURA))
            return; // silent return, client should display error by itself and not send this opcode
 
        _player->CastSpell(_player, spell->Id);
        _player->SetUInt32Value(PLAYER_SELF_RES_SPELL, 0);
    }
}
 
void WorldSession::HandleSpellClick(WorldPacket& recvData)
{
    ObjectGuid guid;
    recvData >> guid;
 
    // this will get something not in world. crash
    Creature* unit = ObjectAccessor::GetCreatureOrPetOrVehicle(*_player, guid);
 
    if (!unit)
        return;
 
    if (!unit->IsInWorld())
        return;
 
    unit->HandleSpellClick(_player);
}
 
void WorldSession::HandleMirrorImageDataRequest(WorldPacket& recvData)
{
    ObjectGuid guid;
    recvData >> guid;
 
    // Get unit for which data is needed by client
    Unit* unit = ObjectAccessor::GetUnit(*_player, guid);
    if (!unit)
        return;
 
    if (!unit->HasAuraType(SPELL_AURA_CLONE_CASTER))
        return;
 
    // Get creator of the unit (SPELL_AURA_CLONE_CASTER does not stack)
    Unit* creator = unit->GetAuraEffectsByType(SPELL_AURA_CLONE_CASTER).front()->GetCaster();
    if (!creator)
        return;
 
    WorldPacket data(SMSG_MIRRORIMAGE_DATA, 68);
    data << guid;
    data << uint32(creator->GetDisplayId());
    data << uint8(creator->GetRace());
    data << uint8(creator->GetGender());
    data << uint8(creator->GetClass());
 
    if (Player* player = creator->ToPlayer())
    {
        data << uint8(player->GetSkinId());
        data << uint8(player->GetFaceId());
        data << uint8(player->GetHairStyleId());
        data << uint8(player->GetHairColorId());
        data << uint8(player->GetFacialStyle());
        data << uint32(player->GetGuildId());
 
        static EquipmentSlots const itemSlots[] =
        {
            EQUIPMENT_SLOT_HEAD,
            EQUIPMENT_SLOT_SHOULDERS,
            EQUIPMENT_SLOT_BODY,
            EQUIPMENT_SLOT_CHEST,
            EQUIPMENT_SLOT_WAIST,
            EQUIPMENT_SLOT_LEGS,
            EQUIPMENT_SLOT_FEET,
            EQUIPMENT_SLOT_WRISTS,
            EQUIPMENT_SLOT_HANDS,
            EQUIPMENT_SLOT_BACK,
            EQUIPMENT_SLOT_TABARD,
            EQUIPMENT_SLOT_END
        };
 
        // Display items in visible slots
        for (EquipmentSlots const* itr = &itemSlots[0]; *itr != EQUIPMENT_SLOT_END; ++itr)
        {
            if (*itr == EQUIPMENT_SLOT_HEAD && player->HasFlag(PLAYER_FLAGS, PLAYER_FLAGS_HIDE_HELM))
                data << uint32(0);
            else if (*itr == EQUIPMENT_SLOT_BACK && player->HasFlag(PLAYER_FLAGS, PLAYER_FLAGS_HIDE_CLOAK))
                data << uint32(0);
            else if (Item const* item = player->GetItemByPos(INVENTORY_SLOT_BAG_0, *itr))
                data << uint32(item->GetDisplayId());
            else
                data << uint32(0);
        }
    }
    else
    {
        // Skip player data for creatures
        data << uint8(0);
        data << uint32(0);
        data << uint32(0);
        data << uint32(0);
        data << uint32(0);
        data << uint32(0);
        data << uint32(0);
        data << uint32(0);
        data << uint32(0);
        data << uint32(0);
        data << uint32(0);
        data << uint32(0);
        data << uint32(0);
        data << uint32(0);
    }
 
    SendPacket(&data);
}
 
void WorldSession::HandleUpdateProjectilePosition(WorldPacket& recvPacket)
{
    TC_LOG_DEBUG("network", "WORLD: CMSG_UPDATE_PROJECTILE_POSITION");
 
    ObjectGuid casterGuid;
    uint32 spellId;
    uint8 castCount;
    float x, y, z;    // Position of missile hit
 
    recvPacket >> casterGuid;
    recvPacket >> spellId;
    recvPacket >> castCount;
    recvPacket >> x;
    recvPacket >> y;
    recvPacket >> z;
 
    Unit* caster = ObjectAccessor::GetUnit(*_player, casterGuid);
    if (!caster)
        return;
 
    Spell* spell = caster->FindCurrentSpellBySpellId(spellId);
    if (!spell || !spell->m_targets.HasDst())
        return;
 
    Position pos = *spell->m_targets.GetDstPos();
    pos.Relocate(x, y, z);
    spell->m_targets.ModDst(pos);
 
    // we changed dest, recalculate flight time
    spell->RecalculateDelayMomentForDst();
 
    WorldPacket data(SMSG_SET_PROJECTILE_POSITION, 21);
    data << casterGuid;
    data << uint8(castCount);
    data << float(x);
    data << float(y);
    data << float(z);
    caster->SendMessageToSet(&data, true);
}