Quantum-Engineering/BlockSelector.cs

public class BlockSelector
{
    private PlayerController playerController;
    public string[] objectNames;
    private int selection;

    public BlockSelector(PlayerController playerController)
    {
        this.playerController = playerController;
        objectNames = new string[] 
        { 
            "Glass Block",
            "Brick", 
            "Iron Block",
            "Iron Ramp",
            "Steel Block",
            "Steel Ramp",
            "Quantum Hatchway",
            "Storage Container",
            "Storage Computer",
            "Electric Light",
            "Auger",
            "Extruder",
            "Press",
            "Smelter",
            "Universal Conduit",
            "Retriever",
            "Rail Cart Hub",
            "Rail Cart",
            "Universal Extractor",
            "Solar Panel",
            "Generator",
            "Nuclear Reactor",
            "Reactor Turbine",
            "Power Conduit",
            "Heat Exchanger",
            "Alloy Smelter",
            "Gear Cutter",
            "Auto Crafter",
            "Dark Matter Conduit",
            "Dark Matter Collector",
            "Turret"
        };
    }

    // Applies changes.
    private void SetSelection()
    {
        playerController.buildType = objectNames[selection];
        playerController.previousBuildType = selection > 0 ? objectNames[selection - 1] : objectNames[objectNames.Length - 1];
        playerController.nextBuildType = selection == objectNames.Length - 1 ? objectNames[0] : objectNames[selection + 1];
        playerController.displayingBuildItem = true;
        playerController.buildItemDisplayTimer = 0;
        playerController.destroyTimer = 0;
        playerController.buildTimer = 0;
        playerController.PlayButtonSound();
    }

    // Changes the currently selected building block.
    public void NextBlock()
    {
        selection = selection < objectNames.Length - 1 ? selection + 1 : 0;
        SetSelection();
    }

    // Changes the currently selected building block.
    public void PreviousBlock()
    {
        selection = selection > 0 ? selection - 1 : objectNames.Length - 1;
        SetSelection();
    }
}