void WorldSession::HandleCastSpellOpcode(WorldPacket& recvPacket)
{
uint32 spellId;
uint8 cast_count, cast_flags;
recvPacket >> cast_count;
recvPacket >> spellId;
recvPacket >> cast_flags; // flags (if 0x02 - some additional data are received)
// ignore for remote control state (for player case)
Unit* mover = _player->GetMover();
if (mover != _player && mover->GetTypeId() == TYPEID_PLAYER)
{
recvPacket.rpos(recvPacket.wpos()); // prevent spam at ignore packet
return;
}
DEBUG_LOG("WORLD: CMSG_CAST_SPELL, spellId - %u, cast_count: %u, unk_flags %u, data length = " SIZEFMTD,
spellId, cast_count, cast_flags, recvPacket.size());
SpellEntry const* spellInfo = sSpellTemplate.LookupEntry<SpellEntry>(spellId);
if (!spellInfo)
{
sLog.outError("WORLD: unknown spell id %u", spellId);
recvPacket.rpos(recvPacket.wpos()); // prevent spam at ignore packet
return;
}
Aura* triggeredByAura = mover->GetTriggeredByClientAura(spellId);
if (mover->GetTypeId() == TYPEID_PLAYER)
{
// not have spell in spellbook or spell passive and not casted by client
if ((!((Player*)mover)->HasActiveSpell(spellId) && !triggeredByAura) || IsPassiveSpell(spellInfo))
{
sLog.outError("World: %s casts spell %u which he shouldn't have", mover->GetGuidStr().c_str(), spellId);
// cheater? kick? ban?
recvPacket.rpos(recvPacket.wpos()); // prevent spam at ignore packet
return;
}
}
else
{
// not have spell in spellbook or spell passive and not casted by client
if (!((Creature*)mover)->HasSpell(spellId) || IsPassiveSpell(spellInfo))
{
// cheater? kick? ban?
recvPacket.rpos(recvPacket.wpos()); // prevent spam at ignore packet
return;
}
}
// client provided targets
SpellCastTargets targets;
#ifdef BUILD_PLAYERBOT
recvPacket >> targets.ReadForCaster(mover);
#else
recvPacket >> targets.ReadForCaster(_player);
#endif
// some spell cast packet including more data (for projectiles)
targets.ReadAdditionalSpellData(recvPacket, cast_flags);
// auto-selection buff level base at target level (in spellInfo)
if (Unit* target = targets.getUnitTarget())
{
// if rank not found then function return nullptr but in explicit cast case original spell can be casted and later failed with appropriate error message
if (SpellEntry const* actualSpellInfo = sSpellMgr.SelectAuraRankForLevel(spellInfo, target->getLevel()))
spellInfo = actualSpellInfo;
}
Spell* spell = new Spell(mover, spellInfo, triggeredByAura ? TRIGGERED_OLD_TRIGGERED : TRIGGERED_NONE, mover->GetObjectGuid(), triggeredByAura ? triggeredByAura->GetSpellProto() : nullptr);
spell->m_cast_count = cast_count; // set count of casts
spell->SpellStart(&targets, triggeredByAura);
}
void WorldSession::HandleUseItemOpcode(WorldPacket& recvPacket)
{
uint8 bagIndex, slot;
uint8 cast_flags; // flags (if 0x02 - some additional data are received)
uint8 cast_count; // next cast if exists (single or not)
ObjectGuid itemGuid;
uint32 glyphIndex; // something to do with glyphs?
uint32 spellid; // casted spell id
recvPacket >> bagIndex >> slot >> cast_count >> spellid >> itemGuid >> glyphIndex >> cast_flags;
// TODO: add targets.read() check
Player* pUser = _player;
// ignore for remote control state
if (!pUser->IsSelfMover())
{
recvPacket.rpos(recvPacket.wpos()); // prevent spam at not read packet tail
return;
}
// reject fake data
if (glyphIndex >= MAX_GLYPH_SLOT_INDEX)
{
recvPacket.rpos(recvPacket.wpos()); // prevent spam at not read packet tail
pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, nullptr, nullptr);
return;
}
Item* pItem = pUser->GetItemByPos(bagIndex, slot);
if (!pItem)
{
recvPacket.rpos(recvPacket.wpos()); // prevent spam at not read packet tail
pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, nullptr, nullptr);
return;
}
if (pItem->GetObjectGuid() != itemGuid)
{
recvPacket.rpos(recvPacket.wpos()); // prevent spam at not read packet tail
pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, nullptr, nullptr);
return;
}
DETAIL_LOG("WORLD: CMSG_USE_ITEM packet, bagIndex: %u, slot: %u, cast_count: %u, spellid: %u, Item: %u, glyphIndex: %u, unk_flags: %u, data length = %u", bagIndex, slot, cast_count, spellid, pItem->GetEntry(), glyphIndex, cast_flags, (uint32)recvPacket.size());
ItemPrototype const* proto = pItem->GetProto();
if (!proto)
{
recvPacket.rpos(recvPacket.wpos()); // prevent spam at not read packet tail
pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, pItem, nullptr);
return;
}
// some item classes can be used only in equipped state
if (proto->InventoryType != INVTYPE_NON_EQUIP && !pItem->IsEquipped())
{
recvPacket.rpos(recvPacket.wpos()); // prevent spam at not read packet tail
pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, pItem, nullptr);
return;
}
InventoryResult msg = pUser->CanUseItem(pItem);
if (msg != EQUIP_ERR_OK)
{
recvPacket.rpos(recvPacket.wpos()); // prevent spam at not read packet tail
pUser->SendEquipError(msg, pItem, nullptr);
return;
}
// not allow use item from trade (cheat way only)
if (pItem->IsInTrade())
{
recvPacket.rpos(recvPacket.wpos()); // prevent spam at not read packet tail
pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, pItem, nullptr);
return;
}
// only allow conjured consumable, bandage, poisons (all should have the 2^21 item flag set in DB)
if (proto->Class == ITEM_CLASS_CONSUMABLE &&
!(proto->Flags & ITEM_FLAG_IGNORE_DEFAULT_ARENA_RESTRICTIONS) &&
pUser->InArena())
{
recvPacket.rpos(recvPacket.wpos()); // prevent spam at not read packet tail
pUser->SendEquipError(EQUIP_ERR_NOT_DURING_ARENA_MATCH, pItem, nullptr);
return;
}
if (pUser->isInCombat())
{
for (const auto& Spell : proto->Spells)
{
if (SpellEntry const* spellInfo = sSpellTemplate.LookupEntry<SpellEntry>(Spell.SpellId))
{
if (IsNonCombatSpell(spellInfo))
{
recvPacket.rpos(recvPacket.wpos()); // prevent spam at not read packet tail
pUser->SendEquipError(EQUIP_ERR_NOT_IN_COMBAT, pItem, nullptr);
return;
}
}
}
// Prevent potion drink if another potion in processing (client have potions disabled in like case)
if (pItem->IsPotion() && pUser->GetLastPotionId())
{
recvPacket.rpos(recvPacket.wpos()); // prevent spam at not read packet tail
pUser->SendEquipError(EQUIP_ERR_OBJECT_IS_BUSY, 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->GetProto()->Bonding == BIND_WHEN_USE || pItem->GetProto()->Bonding == BIND_WHEN_PICKED_UP || pItem->GetProto()->Bonding == BIND_QUEST_ITEM)
{
if (!pItem->IsSoulBound())
{
pItem->SetState(ITEM_CHANGED, pUser);
pItem->SetBinding(true);
}
}
SpellCastTargets targets;
recvPacket >> targets.ReadForCaster(pUser);
// some spell cast packet including more data (for projectiles)
targets.ReadAdditionalSpellData(recvPacket, cast_flags);
targets.Update(pUser);
if (!pItem->IsTargetValidForItemUse(targets.getUnitTarget()))
{
// free gray item after use fail
pUser->SendEquipError(EQUIP_ERR_NONE, pItem, nullptr);
// send spell error
if (SpellEntry const* spellInfo = sSpellTemplate.LookupEntry<SpellEntry>(spellid))
{
// for implicit area/coord target spells
if (IsPointEffectTarget(Targets(spellInfo->EffectImplicitTargetA[EFFECT_INDEX_0])) ||
IsAreaEffectTarget(Targets(spellInfo->EffectImplicitTargetA[EFFECT_INDEX_0])))
Spell::SendCastResult(_player, spellInfo, cast_count, SPELL_FAILED_NO_VALID_TARGETS);
// for explicit target spells
else
Spell::SendCastResult(_player, spellInfo, cast_count, SPELL_FAILED_BAD_TARGETS);
}
return;
}
// Note: If script stop casting it must send appropriate data to client to prevent stuck item in gray state.
if (!sScriptDevAIMgr.OnItemUse(pUser, pItem, targets))
{
// no script or script not process request by self
pUser->CastItemUseSpell(pItem, targets, cast_count, glyphIndex);
}
}