Level reset NPC

// Made by Rochet2
#include "Common.h"
#include "ScriptMgr.h"
#include "Creature.h"
#include "Player.h"
#include "ScriptedGossip.h"
#include "Pet.h"
#include "World.h"
#include "Log.h"


class PRESTIGE_NPC : public CreatureScript
{
public:
    PRESTIGE_NPC() : CreatureScript("PRESTIGE_NPC") { }

    bool OnGossipHello(Player* player, Creature* creature)
    {
        player->ADD_GOSSIP_ITEM_EXTENDED(GOSSIP_ICON_CHAT, "Exchange level 80 to 100k gold", GOSSIP_SENDER_MAIN, GOSSIP_ACTION_INFO_DEF + 2, "WARNING!\nThis will reset your level to 1", 0, false);
        player->ADD_GOSSIP_ITEM(GOSSIP_ICON_TALK, "Nevermind", GOSSIP_SENDER_MAIN, GOSSIP_ACTION_INFO_DEF + 1);
        player->SEND_GOSSIP_MENU(DEFAULT_GOSSIP_MESSAGE, creature->GetGUID());
        return true;
    }

    bool OnGossipSelect(Player* player, Creature* creature, uint32 sender, uint32 action)
    {
        player->PlayerTalkClass->ClearMenus();
        player->CLOSE_GOSSIP_MENU();
        if (sender == GOSSIP_SENDER_MAIN && action == GOSSIP_ACTION_INFO_DEF + 2)
        {
            if (player->getLevel() != 80)
                player->GetSession()->SendNotification("You need to be level 80");
            else
            {
                if (ResetPlayerLevel(player))
                {
                    player->ModifyMoney(1000000000);
                    for (uint8 slot = SLOT_HEAD; slot < SLOT_EMPTY; slot++)
                    {
                        if (player->CanUseItem(player->GetItemByPos(NULL_BAG, slot)) != EQUIP_ERR_OK)
                            player->SetVisibleItemSlot(slot, NULL);
                    }
                    player->GetSession()->LogoutPlayer(true);
                }
                else
                    player->GetSession()->SendNotification("ERROR: can not reset level");
            }
        }
        return true;
    }

    bool ResetPlayerLevel(Player* player)
    {
        if (!HandleResetStatsOrLevelHelper(player))
            return false;

        uint8 oldLevel = player->getLevel();

        // set starting level
        uint32 startLevel = player->getClass() != CLASS_DEATH_KNIGHT
            ? sWorld->getIntConfig(CONFIG_START_PLAYER_LEVEL)
            : sWorld->getIntConfig(CONFIG_START_HEROIC_PLAYER_LEVEL);

        player->_ApplyAllLevelScaleItemMods(false);
        player->SetLevel(startLevel);
        player->InitRunes();
        player->InitStatsForLevel(true);
        player->InitTaxiNodesForLevel();
        player->InitGlyphsForLevel();
        player->InitTalentForLevel();
        player->SetUInt32Value(PLAYER_XP, 0);
        player->ResetSpells(true);

        player->_ApplyAllLevelScaleItemMods(true);

        // reset level for pet
        if (Pet* pet = player->GetPet())
            pet->SynchronizeLevelWithOwner();

        sScriptMgr->OnPlayerLevelChanged(player, oldLevel);
        return true;
    }

    bool HandleResetStatsOrLevelHelper(Player* player)
    {
        ChrClassesEntry const* classEntry = sChrClassesStore.LookupEntry(player->getClass());
        if (!classEntry)
        {
            TC_LOG_ERROR("misc", "Class %u not found in DBC (Wrong DBC files?)", player->getClass());
            return false;
        }

        uint8 powerType = classEntry->powerType;

        // reset m_form if no aura
        if (!player->HasAuraType(SPELL_AURA_MOD_SHAPESHIFT))
            player->SetShapeshiftForm(FORM_NONE);

        player->SetFloatValue(UNIT_FIELD_BOUNDINGRADIUS, DEFAULT_WORLD_OBJECT_SIZE);
        player->SetFloatValue(UNIT_FIELD_COMBATREACH, DEFAULT_COMBAT_REACH);

        player->setFactionForRace(player->getRace());

        player->SetUInt32Value(UNIT_FIELD_BYTES_0, ((player->getRace()) | (player->getClass() << 8) | (player->getGender() << 16) | (powerType << 24)));

        // reset only if player not in some form;
        if (player->GetShapeshiftForm() == FORM_NONE)
            player->InitDisplayIds();

        player->SetByteValue(UNIT_FIELD_BYTES_2, 1, UNIT_BYTE2_FLAG_PVP);

        player->SetUInt32Value(UNIT_FIELD_FLAGS, UNIT_FLAG_PVP_ATTACKABLE);

        //-1 is default value
        player->SetUInt32Value(PLAYER_FIELD_WATCHED_FACTION_INDEX, uint32(-1));

        //player->SetUInt32Value(PLAYER_FIELD_BYTES, 0xEEE00000);
        return true;
    }
};

void AddSC_PRESTIGE_NPC()
{
    new PRESTIGE_NPC();
}