EmuDevs: TrinityCore - Adding data to a map and other stuff

/*
    EmuDevs NPC Tutorial
    http://emudevs.com
    TrinityCore Tutorial
*/

struct SpecialCoords
{
    float x, y, z;
};

UNORDERED_MAP<uint64, SpecialCoords> CoordsStore;

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

    bool OnGossipHello(Player* player, Creature* creature)
    {
        player->ADD_GOSSIP_ITEM(GOSSIP_ICON_CHAT, "Add Coords", GOSSIP_SENDER_MAIN, 1);
        player->ADD_GOSSIP_ITEM(GOSSIP_ICON_CHAT, "Show Data", GOSSIP_SENDER_MAIN, 2);
        player->ADD_GOSSIP_ITEM(GOSSIP_ICON_CHAT, "Delete my aata", GOSSIP_SENDER_MAIN, 3);
        player->SEND_GOSSIP_MENU(1, creature->GetGUID());
        return true;
    }

    bool OnGossipSelect(Player* player, Creature* creature, uint32 /*sender*/, uint32 actions)
    {
        player->PlayerTalkClass->ClearMenus();

        if (CoordsStore.size() > 0)
        {
            UNORDERED_MAP<uint64, SpecialCoords>::iterator itr = CoordsStore.find(player->GetGUID());
            if (itr != CoordsStore.end())
            {
                player->GetSession()->SendNotification("You are already in!");
                player->CLOSE_GOSSIP_MENU();
                return false;
            }
        }

        if (actions == 1)
        {
            CoordsStore[player->GetGUID()].x = 5912.873212f;
            CoordsStore[player->GetGUID()].y = -1912.473212f;
            CoordsStore[player->GetGUID()].z = 122.873212f;
            ChatHandler(player->GetSession()).SendSysMessage("You are in this map!");
            player->CLOSE_GOSSIP_MENU();
        }
        else if (actions == 2)
        {
            for (UNORDERED_MAP<uint64, SpecialCoords>::const_iterator itr = CoordsStore.begin(); itr != CoordsStore.end(); ++itr)
            {
                Player* _player = sObjectMgr->GetPlayerByLowGUID(GUID_LOPART(itr->first));
                if (player || player->IsInWorld())
                    ChatHandler(player->GetSession()).PSendSysMessage("DATA FOR COORDS \n Name: %s \n Coords: \n X: %f \n Y: %f \n Z: %f", _player->GetName().c_str(), itr->second.x, itr->second.y, itr->second.z);
            }
        }
        else if (actions == 3)
            CoordsStore.erase(player->GetGUID());
        return true;
    }
};

void AddSC_gossip()
{
    new npc_tutorial();
}