Whip's New Komodo Launch System v3

/*
//// Whip's Komodo Launch System Script - revision 03 - 10/21/16 ////
*/

//Name of missile
    const string missileName = "Missile";

//Name of silo door
    const string missileSiloName = "Silo";

//Total number of missiles
    int numberOfMissiles = 6; //must be greater or equal to one

//---------------------------------------------------------------------------
//NO TOUCH
//---------------------------------------------------------------------------
    int currentMissileNumber = 1;
    bool retry = false;
    List<IMyProgrammableBlock> programs = new List<IMyProgrammableBlock>();

void Main(string arg)
{
    Echo("WMI Missile Fire System\n");

    if (numberOfMissiles < 1) // mainly for idiot proofing
    {
        Echo("Uhh you can't have less than one missile bro-nacho");
    }

    switch (arg.ToLower())
    {
        case "fire":
            FireNextMissile();
            break;

        case "reset":
            currentMissileNumber = 1;
            break;

        case "kill":
            KillMissile();
            break;

        default:
            break;
    }

    for (int i = 1; i < numberOfMissiles; i++)
    {
        if(retry) //keeps running until it finds a missile to fire
            FireNextMissile();
    }
    retry = false;
}

void FireNextMissile()
{
    List<IMyTerminalBlock> missileTimerList = new List<IMyTerminalBlock>();
    List<IMyTerminalBlock> siloDoorList = new List<IMyTerminalBlock>();
    GridTerminalSystem.SearchBlocksOfName(missileName + " " + currentMissileNumber.ToString(), missileTimerList, IsTimer);
    GridTerminalSystem.SearchBlocksOfName(missileSiloName + " " + currentMissileNumber.ToString(), siloDoorList, IsDoor);

    if (missileTimerList.Count == 0) //aborts if no timers are found
    {
        Echo("Skipping: No missiles found with name '" + missileName + " " + currentMissileNumber.ToString() + "'");
        retry = true;
    }
    else {
        retry = false;

        //triggers missile timer
        for (int i = 0; i < missileTimerList.Count; i++)
        {
            var thisMissileTimer = missileTimerList[i] as IMyTimerBlock;

            if (thisMissileTimer != null)
            {
                thisMissileTimer.ApplyAction("TriggerNow"); //triggers it
                Echo(thisMissileTimer.CustomName + " was triggered");
            }
        }

        //opens our doors
        for (int i = 0; i < siloDoorList.Count; i++)
        {
            var thisSiloDoor = siloDoorList[i] as IMyDoor;

            if (thisSiloDoor != null)
            {
                thisSiloDoor.ApplyAction("OnOff_On"); //ensures it is on
                thisSiloDoor.ApplyAction("Open_On"); //triggers it
            }
        }

        //adds to active program list
        var tempList = new List<IMyTerminalBlock>();
        GridTerminalSystem.SearchBlocksOfName(missileName + " " + currentMissileNumber.ToString(), tempList, IsProgram);
        foreach(IMyProgrammableBlock thisProgram in tempList)
        {
            programs.Add(thisProgram as IMyProgrammableBlock);
        }
    }

    if (currentMissileNumber >= numberOfMissiles)
    {
        currentMissileNumber = 1;
    }
    else {
        currentMissileNumber++;
    }
}

void KillMissile()
{
    Echo("Guidance Killed for " + programs.Count.ToString() + " missile(s)");
    foreach (IMyProgrammableBlock thisProgram in programs)
    {
        bool blockExists = DoesBlockExist( thisProgram );
        if ( blockExists )
        {
            thisProgram.TryRun("kill");
        }
    }
    programs.Clear();
}

bool DoesBlockExist( IMyTerminalBlock thisBlock )
{
    Vector3I pos = thisBlock.Position;
    bool exists = thisBlock.CubeGrid.CubeExists( pos );
    return exists;
}

bool IsProgram(IMyTerminalBlock test_block) //checks if block is program
{
    var cast_program = test_block as IMyProgrammableBlock;
    return cast_program != null;
}

bool IsTimer(IMyTerminalBlock test_block) //checks if block is timer
{
    var cast_timer = test_block as IMyTimerBlock;
    return cast_timer != null;
}

bool IsDoor(IMyTerminalBlock test_block) //checks if block is timer
{
    var cast_door = test_block as IMyDoor;
    return cast_door != null;
}