Aircraft pay n spray

/*======================================
Includes
========================================*/
#include <a_samp>
#include <streamer>

/*======================================
Defines
========================================*/
#define RESPRAYAMOUNT 1000

/*======================================
Global Variables
========================================*/
new LvCP;
new LsCP;
new SfCP;
//new AaCP; //to be added (abandoned airport)
new ResprayTimer;

new bool:resprayactive;

/*======================================
CallBacks
========================================*/
public OnFilterScriptInit()
{
    LvCP = CreateDynamicCP(1582.7861,1189.7758,10.8125, 25);
    LsCP = CreateDynamicCP(1835.8551,-2431.9338,13.5547, 25);
    SfCP = CreateDynamicCP(-1218.3027,-471.7718,14.1484, 25);
    print("______________________________");
    print("     Aircraft Pay n' Spray");
    print("         By Turbo");
    print("      Successfully loaded");
    print("______________________________");
    return 1;
}
public OnFilterScriptExit()
{
    print("______________________________");
    print("     Aircraft Pay n' Spray");
    print("         By Turbo");
    print("      Successfully un-loaded");
    print("______________________________");
    return 1;
}
public OnPlayerEnterDynamicCP(playerid, checkpointid)
{
    if(checkpointid == LvCP || LsCP || SfCP)
    {
        if(!IsPlayerInPlane(playerid)) return SendClientMessage(playerid, -1, "ERROR: This Pay n' Spray is only for flying vehicles(Planes/Helicopters)");
        GameTextForPlayer(playerid,"~g~Respraying in Progress~n~~b~please wait 10 seconds", 10000, 3);
        ResprayTimer = SetTimerEx("PaynSpray",10000, false, "i",playerid);
        resprayactive = true;
    }
    return 1;
}
public OnPlayerLeaveDynamicCP(playerid, checkpointid)
{
    if(resprayactive == true)
    {
        KillTimer(ResprayTimer);
        GameTextForPlayer(playerid, "~r~You left the check point~n~~b~Respray Canclled", 2000, 3);
        resprayactive = false;
    }
    return 1;
}
/*======================================
Timers
========================================*/
forward PaynSpray(playerid);
public PaynSpray(playerid)
{
    new veh = GetPlayerVehicleID(playerid);
    RepairVehicle(veh);
    ChangeVehicleColor(veh, -1, -1);
    GivePlayerMoney(playerid, -RESPRAYAMOUNT);
    GameTextForPlayer(playerid, "~g~Respray Completed~n~~w~New Engine", 2000, 3);
    resprayactive = false;
}
/*======================================
Custom functions
========================================*/
IsPlayerInPlane(playerid)
{
    if(IsPlayerInAnyVehicle(playerid))
    {
        switch(GetVehicleModel(GetPlayerVehicleID(playerid)))
        {
            case 592,577,511,512,593,520,553,464,476,519,460,513,539,548,425,417,487,497,563,501,465,447,469,488 : return 1;
        }
    }
    return 0;
}