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[How to] GM Absolute Restriction System

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Hello devs :)
Today I would like to present you a new solution that can make you feel more safe with your GMs. This is my first release and it's very simple to do, I'm just posting it here for the newbies and those who don't know how to start searching and other shit like that :P

WHAT IS THIS SYSTEM?

This system is a number of preventions for GameMaster characters about certain interractions with normal players in the game. The functions you are about to see are blocking GMs from:

  1. Trading items with normal players (and the opposite)
  2. Invite normal players to parties (and the opposite)
  3. Invite normal players to guilds (and the opposite)
  4. Adding normal players as friend contacts (I would say and the opposite but it already exists by default :P)
  5. Drop items to the ground
  6. Build their own private shops with the Bundle item
  7. Buy items from a private shop
  8. Block a GM from buffing normal players
  9. Using the commands /set, /a and /setskillother to normal players

WHO IS THIS SYSTEM FOR?

I believe we can all agree that trust in partnership is a rare thing these days. This system is released from me for the Admins out there that cannot trust their GMs (and many times their self) so much. Imagine having a server and your GM just gives away items for free to everyone. Bad huh? I thought so... So with this system you are sure that your GMs will do their job properly and won't violate any game rules behind your backs. Your server has rules (as all games out there) and if you wanted people to have some items for free you can easily put those items for sale into the town vendors. People who do this kind of things behind your backs are not authorized by you to do it but I believe that it happened (if not happening yet) to the best of you guys, that's why I'm releasing it. It's time to set some things right in your servers, GMs exist to answer questions and not helping players cheat without any authorization from the administrators, so without further ado, let's get started.

SORRY AGAIN, ONE MORE THING :P I BELIEVE THIS QUESTION IS IN THE MIND OF A DEVELOPER WHO READS THIS GUIDE:
MIND RAPIST, WHY DO YOU USE THE 
IsGM() BOOLEAN TO CHECK IF A PLAYER IS A GM AND NOT USE THE TRADITIONAL CHECK GetGMLevel() > GM_PLAYER?

In this tutorial, we will be using the bool IsGM() instead of the usual check because some of the guys who see this may have added @Alina's GM Elevation system. In that case, GetGMLevel() won't work before the character elevates, so our GMs will be able to bypass the check and just create a perfect item, relog and give it away before they elevate. We don't want that don't we? So who ever wants to use GetGMLevel() > GM_PLAYER instead of IsGM() there is no difference you can do that guys, except if you did the elevation system, then you need to use my function in order to work.

So let's get the party started.

PARTY INVITATION BLOCK

In char.cpp search for the function "void CHARACTER::PartyInvite(LPCHARACTER pchInvitee)" and under

  Hide contents

    else if (pchInvitee->IsBlockMode(BLOCK_PARTY_INVITE))
    {
        ChatPacket(CHAT_TYPE_INFO, LC_TEXT("<파티> %s 님이 파티 거부 상태입니다."), pchInvitee->GetName());
        return;
    }

add this:

  Hide contents

    else if (IsGM() == true && pchInvitee->IsGM() == false)
    {
        ChatPacket(CHAT_TYPE_INFO, LC_TEXT("<Party> You cannot send a party invitation to a player!"));
        return;
    }    
    
    else if (IsGM() == false && pchInvitee->IsGM() == true)
    {
        ChatPacket(CHAT_TYPE_INFO, LC_TEXT("<Party> You cannot send a party invitation to a GameMaster!"));
        return;
    }

Done with party block, let's continue

BUNDLE USAGE BLOCK FOR CREATING PRIVATE SHOPS

In char_item.cpp search for the function "bool CHARACTER::UseItemEx(LPITEM item, TItemPos DestCell)" and under

  Hide contents

                            case 50200: // 보따리
                                if (LC_IsYMIR() == true || LC_IsKorea() == true)
                                {
                                    if (IS_BOTARYABLE_ZONE(GetMapIndex()) == true)
                                    {
                                        __OpenPrivateShop();
                                    }
                                    else
                                    {
                                        ChatPacket(CHAT_TYPE_INFO, LC_TEXT("개인 상점을 열 수 없는 지역입니다"));
                                    }
                                }

add this:

  Hide contents

                                if (IsGM() == true)
                                {
                                    ChatPacket(CHAT_TYPE_INFO, LC_TEXT("GameMasters can't build private shops."));
                                    return false;
                                }

Done, let's continue

ITEM DROP BLOCK

Still in char_item.cpp search for the function "bool CHARACTER::DropItem(TItemPos Cell, BYTE bCount)" and under

  Hide contents

    LPITEM item = NULL; 

add this:

  Hide contents

    if (IsGM() == true)
    {
        ChatPacket(CHAT_TYPE_INFO, LC_TEXT("GameMasters can't drop items."));
        return false;
    }

Done with that one, you can close char_item.cpp. Let's move on

BUFF BLOCK

In char_skill.cpp find this:

  Hide contents

bool CHARACTER::UseSkill(DWORD dwVnum, LPCHARACTER pkVictim, bool bUseGrandMaster)
{

and paste this under it:

  Hide contents

    int pTableSkill[] = {94,95,96,109,110,111};
    
    for (int i = 0; i < _countof(pTableSkill); i++)
    {
        if (dwVnum == pTableSkill && IsGM() == true && pkVictim->IsGM() == false)
        {
            pkVictim = this; // That will return the buff to the buffer and not the target.
        }
    }

Done with that, next!

/SET COMMAND BLOCK FOR PLAYERS

In cmd_gm.cpp search for the function "ACMD(do_set)" and under

  Hide contents

    tch = CHARACTER_MANAGER::instance().FindPC(arg1);

add this:

  Hide contents

    if (tch->IsGM() == false)
    {
        ch->ChatPacket(CHAT_TYPE_INFO, "You can only use this on GM characters.");
        return;
    }

Done, but do not close, we have more commands to block!

/A COMMAND BLOCK FOR PLAYERS

Still in cmd_gm.cpp, search for the function "ACMD(do_advance)" and under

  Hide contents

    LPCHARACTER tch = CHARACTER_MANAGER::instance().FindPC(arg1);

add this:

  Hide contents

    if (tch->IsGM() == false)
    {
        ch->ChatPacket(CHAT_TYPE_INFO, "You can only change the level of GM characters.");
        return;
    }

Do not close that file yet, one more command left to block :P

/SETSKILLOTHER COMMAND BLOCK FOR PLAYERS

Still in this file, search for the function "ACMD(do_setskillother)" and under

  Hide contents

    tch = CHARACTER_MANAGER::instance().FindPC(arg1);

add this:

  Hide contents

    if (tch->IsGM() == false)
    {
        ch->ChatPacket(CHAT_TYPE_INFO, "You can only change GM characters' skills.");
        return;
    }

Done with the commands, you may close cmd_gm.cpp and move on :)

EXCHANGE BLOCK

In exchange.cpp search for the function "bool CHARACTER::ExchangeStart(LPCHARACTER victim)" and under

  Hide contents

    if ( IsOpenSafebox() || GetShopOwner() || GetMyShop() || IsCubeOpen() )
    {
        ChatPacket( CHAT_TYPE_INFO, LC_TEXT("다른 거래창이 열려있을경우 거래를 할수 없습니다." ) );
        return false;
    }

(if you have sash system in your source, the top line may be "if ( IsOpenSafebox() || GetShopOwner() || GetMyShop() || IsCubeOpen() || IsAcceOpen() )")
add this:

  Hide contents

    if (IsGM() == false && victim->IsGM() == true)
    {
        ChatPacket(CHAT_TYPE_INFO, LC_TEXT("You cannot trade items with a Game Master."));
        return false;
    }

    if (IsGM() == true && victim->IsGM() == false)
    {
        ChatPacket(CHAT_TYPE_INFO, LC_TEXT("Game Masters cannot trade items with players."));
        return false;
    }

Done with the exchange, moving on!

GUILD INVITATION BLOCK

In guild.cpp search for the function "void CGuild::Invite( LPCHARACTER pchInviter, LPCHARACTER pchInvitee )" and under

  Hide contents

    else if ( pchInvitee->GetEmpire() != pchInviter->GetEmpire() ) 
    {
        pchInviter->ChatPacket( CHAT_TYPE_INFO, LC_TEXT("<길드> 다른 제국 사람을 길드에 초대할 수 없습니다.") );
        return;
    }

add this:

  Hide contents

    else if (pchInviter->IsGM() == true && pchInvitee->IsGM() == false)
    {
        pchInviter->ChatPacket(CHAT_TYPE_INFO, LC_TEXT("<Guild> You can not invite a player to your guild!"));
        return;
    }    
    
    else if (pchInviter->IsGM() == false && pchInvitee->IsGM() == true)
    {
        pchInviter->ChatPacket(CHAT_TYPE_INFO, LC_TEXT("<Guild> You can not invite a GM to your guild!"));
        return;
    }

Here goes the guild invitation, let's move forward

FRIEND LIST BLOCK

In input_main.cpp search for the function "int CInputMain::Messenger(LPCHARACTER ch, const char* c_pData, size_t uiBytes)" and find this line:

  Hide contents

if (ch->GetGMLevel() == GM_PLAYER && ch_companion->GetGMLevel() != GM_PLAYER)

change it like this:

  Hide contents

if (ch->IsGM() == false && ch_companion->IsGM() == true)

Still in the same function, find this line in "case MESSENGER_SUBHEADER_CG_ADD_BY_NAME:":

  Hide contents

                strlcpy(name, c_pData, sizeof(name));

and add this:

  Hide contents

                if (ch->IsGM() == true && gm_get_level(name) == GM_PLAYER)
                {
                    ch->ChatPacket(CHAT_TYPE_INFO, LC_TEXT("GameMasters can't have player friends."));
                    return CHARACTER_NAME_MAX_LEN;
                }

Friends are done. Let's move on to the last one!

BUYING ITEMS FROM PRIVATE SHOPS BLOCK

In shop_manager.cpp search for the function "void CShopManager::Buy(LPCHARACTER ch, BYTE pos)" and under

  Hide contents

    CShop* pkShop = ch->GetShop();

add this:

  Hide contents

    if (ch->IsGM() && pkShop->IsPCShop())
    {
        ch->ChatPacket(CHAT_TYPE_INFO, "GameMasters cannot buy items from players' shops.");
        return;
    }

Done :)
It's not something hard to do, I just gathered everything in one place, you can now sleep at night knowing that your GMs cannot fraud you.

I would like to give special thanks to @VegaS who wrote the blocks for buffs, party and guild invitation, thanks so much buddy :)

Note: These will block any interraction between a GM and a normal player, but a GM will be able to interract with another GM (example trade GM with GM).

And before someone asks yes I thought about a safebox block for GMs but there is no need for that since you can login to his account and create 3 players, then logout and delete them directly from their database, leaving 3 warriors with Level 0 that cannot login to the game. Let the poor GMs have their safebox it's the only thing left to them after that I think xD

So I hope I helped some folks here the tutorial is done :)

Kind regards ~ Mind Rapist

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