#include "ItemEnchantmentMgr.h"
#include "DBCStores.h"
#include "DatabaseEnv.h"
#include "Log.h"
#include "ObjectMgr.h"
#include "Util.h"
#include <cmath>
#include <functional>
#include <vector>

Classes
struct	EnchStoreItem

Typedefs
typedef std::vector< EnchStoreItem >	EnchStoreList

typedef std::unordered_map< uint32, EnchStoreList >	EnchantmentStore

Functions
void	LoadRandomEnchantmentsTable ()

uint32	GetItemEnchantMod (int32 entry)

uint32	GenerateEnchSuffixFactor (uint32 item_id)

Variables
static EnchantmentStore	RandomItemEnch

Typedef Documentation

◆ EnchantmentStore

typedef std::unordered_map<uint32, EnchStoreList> EnchantmentStore

◆ EnchStoreList

typedef std::vector<EnchStoreItem> EnchStoreList

Function Documentation

◆ GenerateEnchSuffixFactor()

uint32 GenerateEnchSuffixFactor ( uint32 item_id )

{
    ItemTemplate const* itemProto = sObjectMgr->GetItemTemplate(item_id);
 
    if (!itemProto)
        return 0;
    if (!itemProto->RandomSuffix)
        return 0;
 
    RandomPropertiesPointsEntry const* randomProperty = sRandomPropertiesPointsStore.LookupEntry(itemProto->ItemLevel);
    if (!randomProperty)
        return 0;
 
    uint32 suffixFactor;
    switch (itemProto->InventoryType)
    {
        // Items of that type don`t have points
        case INVTYPE_NON_EQUIP:
        case INVTYPE_BAG:
        case INVTYPE_TABARD:
        case INVTYPE_AMMO:
        case INVTYPE_QUIVER:
        case INVTYPE_RELIC:
            return 0;
        // Select point coefficient
        case INVTYPE_HEAD:
        case INVTYPE_BODY:
        case INVTYPE_CHEST:
        case INVTYPE_LEGS:
        case INVTYPE_2HWEAPON:
        case INVTYPE_ROBE:
            suffixFactor = 0;
            break;
        case INVTYPE_SHOULDERS:
        case INVTYPE_WAIST:
        case INVTYPE_FEET:
        case INVTYPE_HANDS:
        case INVTYPE_TRINKET:
            suffixFactor = 1;
            break;
        case INVTYPE_NECK:
        case INVTYPE_WRISTS:
        case INVTYPE_FINGER:
        case INVTYPE_SHIELD:
        case INVTYPE_CLOAK:
        case INVTYPE_HOLDABLE:
            suffixFactor = 2;
            break;
        case INVTYPE_WEAPON:
        case INVTYPE_WEAPONMAINHAND:
        case INVTYPE_WEAPONOFFHAND:
            suffixFactor = 3;
            break;
        case INVTYPE_RANGED:
        case INVTYPE_THROWN:
        case INVTYPE_RANGEDRIGHT:
            suffixFactor = 4;
            break;
        default:
            return 0;
    }
    // Select rare/epic modifier
    switch (itemProto->Quality)
    {
        case ITEM_QUALITY_UNCOMMON:
            return randomProperty->UncommonPropertiesPoints[suffixFactor];
        case ITEM_QUALITY_RARE:
            return randomProperty->RarePropertiesPoints[suffixFactor];
        case ITEM_QUALITY_EPIC:
            return randomProperty->EpicPropertiesPoints[suffixFactor];
        case ITEM_QUALITY_LEGENDARY:
        case ITEM_QUALITY_ARTIFACT:
            return 0;                                       // not have random properties
        default:
            break;
    }
    return 0;
}

References RandomPropertiesPointsEntry::EpicPropertiesPoints, ItemTemplate::InventoryType, INVTYPE_2HWEAPON, INVTYPE_AMMO, INVTYPE_BAG, INVTYPE_BODY, INVTYPE_CHEST, INVTYPE_CLOAK, INVTYPE_FEET, INVTYPE_FINGER, INVTYPE_HANDS, INVTYPE_HEAD, INVTYPE_HOLDABLE, INVTYPE_LEGS, INVTYPE_NECK, INVTYPE_NON_EQUIP, INVTYPE_QUIVER, INVTYPE_RANGED, INVTYPE_RANGEDRIGHT, INVTYPE_RELIC, INVTYPE_ROBE, INVTYPE_SHIELD, INVTYPE_SHOULDERS, INVTYPE_TABARD, INVTYPE_THROWN, INVTYPE_TRINKET, INVTYPE_WAIST, INVTYPE_WEAPON, INVTYPE_WEAPONMAINHAND, INVTYPE_WEAPONOFFHAND, INVTYPE_WRISTS, ITEM_QUALITY_ARTIFACT, ITEM_QUALITY_EPIC, ITEM_QUALITY_LEGENDARY, ITEM_QUALITY_RARE, ITEM_QUALITY_UNCOMMON, ItemTemplate::ItemLevel, ItemTemplate::Quality, ItemTemplate::RandomSuffix, RandomPropertiesPointsEntry::RarePropertiesPoints, sObjectMgr, sRandomPropertiesPointsStore, and RandomPropertiesPointsEntry::UncommonPropertiesPoints.

Referenced by LootItem::LootItem(), and Item::UpdateItemSuffixFactor().

◆ GetItemEnchantMod()

uint32 GetItemEnchantMod ( int32 entry )

{
    if (!entry)
        return 0;
 
    if (entry == -1)
        return 0;
 
    EnchantmentStore::const_iterator tab = RandomItemEnch.find(entry);
    if (tab == RandomItemEnch.end())
    {
        LOG_ERROR("sql.sql", "Item RandomProperty / RandomSuffix id #{} used in `item_template` but it does not have records in `item_enchantment_template` table.", entry);
        return 0;
    }
 
    double dRoll = rand_chance();
    float fCount = 0;
 
    for (EnchStoreList::const_iterator ench_iter = tab->second.begin(); ench_iter != tab->second.end(); ++ench_iter)
    {
        fCount += ench_iter->chance;
 
        if (fCount > dRoll)
            return ench_iter->ench;
    }
 
    //we could get here only if sum of all enchantment chances is lower than 100%
    dRoll = (irand(0, (int)std::floor(fCount * 100) + 1)) / 100;
    fCount = 0;
 
    for (EnchStoreList::const_iterator ench_iter = tab->second.begin(); ench_iter != tab->second.end(); ++ench_iter)
    {
        fCount += ench_iter->chance;
 
        if (fCount > dRoll)
            return ench_iter->ench;
    }
 
    return 0;
}

References irand(), LOG_ERROR, rand_chance(), and RandomItemEnch.

Referenced by Item::GenerateItemRandomPropertyId(), and ObjectMgr::LoadItemTemplates().

◆ LoadRandomEnchantmentsTable()

void LoadRandomEnchantmentsTable ( )

{
    uint32 oldMSTime = getMSTime();
 
    RandomItemEnch.clear();                                 // for reload case
 
    //                                                 0      1      2
    QueryResult result = WorldDatabase.Query("SELECT entry, ench, chance FROM item_enchantment_template");
 
    if (result)
    {
        uint32 count = 0;
 
        do
        {
            Field* fields = result->Fetch();
 
            uint32 entry = fields[0].Get<uint32>();
            uint32 ench = fields[1].Get<uint32>();
            float chance = fields[2].Get<float>();
 
            if (chance > 0.000001f && chance <= 100.0f)
                RandomItemEnch[entry].push_back(EnchStoreItem(ench, chance));
 
            ++count;
        } while (result->NextRow());
 
        LOG_INFO("server.loading", ">> Loaded {} Item Enchantment Definitions in {} ms", count, GetMSTimeDiffToNow(oldMSTime));
        LOG_INFO("server.loading", " ");
    }
    else
    {
        LOG_WARN("server.loading", ">> Loaded 0 Item Enchantment definitions. DB table `item_enchantment_template` is empty.");
        LOG_INFO("server.loading", " ");
    }
}