ItemEnchantmentMgr.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 "ItemEnchantmentMgr.h"
#include "Containers.h"
#include "DatabaseEnv.h"
#include "DB2Stores.h"
#include "ItemBonusMgr.h"
#include "ItemTemplate.h"
#include "Log.h"
#include "ObjectMgr.h"
#include "Timer.h"
#include <list>
#include <vector>
 
namespace
{
 struct RandomBonusListIds
 {
 std::vector<int32> BonusListIDs;
 std::vector<double> Chances;
 };
 
 std::unordered_map<uint32, RandomBonusListIds> _storage;
}
 
void LoadItemRandomBonusListTemplates()
{
 uint32 oldMSTime = getMSTime();
 
 _storage.clear();
 
 // 0 1 2
 QueryResult result = WorldDatabase.Query("SELECT Id, BonusListID, Chance FROM item_random_bonus_list_template");
 
 if (result)
 {
 uint32 count = 0;
 
 do
 {
 Field* fields = result->Fetch();
 
 uint32 id = fields[0].GetUInt32();
 uint32 bonusListId = fields[1].GetUInt32();
 float chance = fields[2].GetFloat();
 
 if (ItemBonusMgr::GetItemBonuses(bonusListId).empty())
 {
 TC_LOG_ERROR("sql.sql", "Bonus list {} used in `item_random_bonus_list_template` by id {} doesn't have exist in ItemBonus.db2", bonusListId, id);
 continue;
 }
 
 if (chance < 0.000001f || chance > 100.0f)
 {
 TC_LOG_ERROR("sql.sql", "Bonus list {} used in `item_random_bonus_list_template` by id {} has invalid chance {}", bonusListId, id, chance);
 continue;
 }
 
 RandomBonusListIds& ids = _storage[id];
 ids.BonusListIDs.push_back(bonusListId);
 ids.Chances.push_back(chance);
 
 ++count;
 } while (result->NextRow());
 
 TC_LOG_INFO("server.loading", ">> Loaded {} Random item bonus list definitions in {} ms", count, GetMSTimeDiffToNow(oldMSTime));
 }
 else
 TC_LOG_INFO("server.loading", ">> Loaded 0 Random item bonus list definitions. DB table `item_random_bonus_list_template` is empty.");
}
 
ItemRandomBonusListId GenerateItemRandomBonusListId(uint32 item_id)
{
 ItemTemplate const* itemProto = sObjectMgr->GetItemTemplate(item_id);
 if (!itemProto)
 return 0;
 
 // item must have one from this field values not null if it can have random enchantments
 if (!itemProto->RandomBonusListTemplateId)
 return 0;
 
 auto tab = _storage.find(itemProto->RandomBonusListTemplateId);
 if (tab == _storage.end())
 {
 TC_LOG_ERROR("sql.sql", "Item RandomBonusListTemplateId id #{} used in `item_template_addon` but it does not have records in `item_random_bonus_list_template` table.", itemProto->RandomBonusListTemplateId);
 return 0;
 }
 
 return *Trinity::Containers::SelectRandomWeightedContainerElement(tab->second.BonusListIDs, std::span(tab->second.Chances));
}
 
TC_GAME_API float GetRandomPropertyPoints(uint32 itemLevel, uint32 quality, uint32 inventoryType, uint32 subClass)
{
 uint32 propIndex;
 
 switch (inventoryType)
 {
 case INVTYPE_HEAD:
 case INVTYPE_BODY:
 case INVTYPE_CHEST:
 case INVTYPE_LEGS:
 case INVTYPE_RANGED:
 case INVTYPE_2HWEAPON:
 case INVTYPE_ROBE:
 case INVTYPE_THROWN:
 propIndex = 0;
 break;
 case INVTYPE_RANGEDRIGHT:
 if (subClass == ITEM_SUBCLASS_WEAPON_WAND)
 propIndex = 3;
 else
 propIndex = 0;
 break;
 case INVTYPE_WEAPON:
 case INVTYPE_WEAPONMAINHAND:
 case INVTYPE_WEAPONOFFHAND:
 propIndex = 3;
 break;
 case INVTYPE_SHOULDERS:
 case INVTYPE_WAIST:
 case INVTYPE_FEET:
 case INVTYPE_HANDS:
 case INVTYPE_TRINKET:
 propIndex = 1;
 break;
 case INVTYPE_NECK:
 case INVTYPE_WRISTS:
 case INVTYPE_FINGER:
 case INVTYPE_SHIELD:
 case INVTYPE_CLOAK:
 case INVTYPE_HOLDABLE:
 propIndex = 2;
 break;
 case INVTYPE_RELIC:
 propIndex = 4;
 break;
 default:
 return 0;
 }
 
 RandPropPointsEntry const* randPropPointsEntry = sRandPropPointsStore.LookupEntry(itemLevel);
 if (!randPropPointsEntry)
 return 0;
 
 switch (quality)
 {
 case ITEM_QUALITY_UNCOMMON:
 return randPropPointsEntry->GoodF[propIndex];
 case ITEM_QUALITY_RARE:
 case ITEM_QUALITY_HEIRLOOM:
 return randPropPointsEntry->SuperiorF[propIndex];
 case ITEM_QUALITY_EPIC:
 case ITEM_QUALITY_LEGENDARY:
 case ITEM_QUALITY_ARTIFACT:
 return randPropPointsEntry->EpicF[propIndex];
 }
 
 return 0;
}