Esempio n. 1
0
void WorldSession::HandleUseItemOpcode(WorldPacket& recvPacket)
{
    // TODO: add targets.read() check
    Player* pUser = _player;

    // ignore for remote control state
    if(pUser->m_mover != pUser)
        return;

    uint8 bagIndex, slot;
    uint8 unk_flags;                                        // flags (if 0x02 - some additional data are received)
    uint8 cast_count;                                       // next cast if exists (single or not)
    uint64 item_guid;
    uint32 glyphIndex;                                      // something to do with glyphs?
    uint32 spellid;                                         // casted spell id

    recvPacket >> bagIndex >> slot >> cast_count >> spellid >> item_guid >> glyphIndex >> unk_flags;

    // reject fake data
    if (glyphIndex >= MAX_GLYPH_SLOT_INDEX)
    {
        pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, NULL, NULL );
        return;
    }

    Item *pItem = pUser->GetItemByPos(bagIndex, slot);
    if (!pItem)
    {
        pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, NULL, NULL );
        return;
    }

    if (pItem->GetGUID() != item_guid)
    {
        pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, NULL, NULL );
        return;
    }

    sLog.outDetail("WORLD: CMSG_USE_ITEM packet, bagIndex: %u, slot: %u, cast_count: %u, spellid: %u, Item: %u, glyphIndex: %u, unk_flags: %u, data length = %i", bagIndex, slot, cast_count, spellid, pItem->GetEntry(), glyphIndex, unk_flags, (uint32)recvPacket.size());

    ItemPrototype const *proto = pItem->GetProto();
    if (!proto)
    {
        pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, pItem, NULL );
        return;
    }

    // some item classes can be used only in equipped state
    if (proto->InventoryType != INVTYPE_NON_EQUIP && !pItem->IsEquipped())
    {
        pUser->SendEquipError(EQUIP_ERR_ITEM_NOT_FOUND, pItem, NULL );
        return;
    }

    uint8 msg = pUser->CanUseItem(pItem);
    if (msg != EQUIP_ERR_OK)
    {
        pUser->SendEquipError( msg, pItem, NULL );
        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_FLAGS_USEABLE_IN_ARENA) &&
        pUser->InArena())
    {
        pUser->SendEquipError(EQUIP_ERR_NOT_DURING_ARENA_MATCH,pItem,NULL);
        return;
    }

    if (pUser->isInCombat())
    {
        for(int i = 0; i < MAX_ITEM_PROTO_SPELLS; ++i)
        {
            if (SpellEntry const *spellInfo = sSpellStore.LookupEntry(proto->Spells[i].SpellId))
            {
                if (IsNonCombatSpell(spellInfo))
                {
                    pUser->SendEquipError(EQUIP_ERR_NOT_IN_COMBAT,pItem,NULL);
                    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);

    targets.Update(pUser);

    if (!pItem->IsTargetValidForItemUse(targets.getUnitTarget()))
    {
        // free gray item after use fail
        pUser->SendEquipError(EQUIP_ERR_NONE, pItem, NULL);

        // send spell error
        if (SpellEntry const* spellInfo = sSpellStore.LookupEntry(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(!Script->ItemUse(pUser,pItem,targets))
    {
        // no script or script not process request by self
        pUser->CastItemUseSpell(pItem,targets,cast_count,glyphIndex);
    }
}
Esempio n. 2
0
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);
    }
}