TypeScript - Spaceship

This demonstrates the use of a TypeScript Class. The Spaceship Class has all of the common members: fields, properties, methods, and constructors.

The constructor requires you to pass in the following arguments:

1. DesignationCode
2. ShipName
3. NumberOfWarpNacelles
4. NumberOfPassengers
5. NumberOfCrew

If you do not pass these in or any of them are of the wrong type, it will throw an error in the console.

class Spaceship
{
    // fields
    private _designationCode: string = "";
    private _shipName: string = "";
    private _numberOfWarpNacelles: number = 0;
    private _numberOfPassengers: number = 0;
    private _numberOfCrew: number = 0;

    private _secretSecurityCode: string = "alpha111"; //never should be shown or changed.

    // properties - these are what you want expose publicly.
    get designationCode(): string { return this._designationCode; }
    set designationCode(value: string)
    {
        if ((value == undefined) || (value === ""))
        {
            value = "Designation Code needed.";
            throw "Designation Code needed.";
        }
        else
        {
            this._designationCode = value;
        }
    }

    get shipName(): string
    { return this._shipName; }
    set shipName(value: string)
    {
        if ((value == undefined) || (value == ""))
        { throw "Ship Name needed."; }
        this._shipName = value;
    }

    get numberOfWarpNacelles(): number
    { return this._numberOfWarpNacelles; }
    set numberOfWarpNacelles(value: number)
    {
        if ((value == undefined) || (value == 0))
        { throw "Number of Warp Nacelles needed."; }
        this._numberOfWarpNacelles = value;
    }

    get numberOfPassengers(): number
    { return this._numberOfPassengers; }
    set numberOfPassengers(value: number)
    {
        if ((value == undefined) || (value == 0))
        { throw "Number of Passengers needed."; }
        this._numberOfPassengers = value;
    }

    get numberOfCrew(): number { return this._numberOfCrew; }
    set numberOfCrew(value: number)
    {
        if ((value == undefined) || (value == 0))
            { throw "Number of Crew needed."; }
        this._numberOfCrew = value;
    }


    // constructor
    constructor(DesignationCode: string, ShipName: string, NumberOfWarpNacelles: number, NumberOfPassengers: number, NumberOfCrew: number) {
        this.designationCode = DesignationCode;
        this.shipName = ShipName;
        this.numberOfWarpNacelles = NumberOfWarpNacelles;
        this.numberOfPassengers = NumberOfPassengers;
        this.numberOfCrew = NumberOfCrew;
    }

    FillLabels()
    {
        if (this._secretSecurityCode.length > 0)
        {
            // do secret stuff.
        }

        var DesignationLabel = <HTMLElement>document.getElementById("designation-label");
        DesignationLabel.innerHTML = "Designation: " + this._designationCode;

        var NameLabel = <HTMLElement>document.getElementById("name-label");
        NameLabel.innerHTML = "Name: " + this._shipName;

        var WarpEnginesLabel = <HTMLElement>document.getElementById("engines-label");
        WarpEnginesLabel.innerHTML = "Warp Engines: " + this._numberOfWarpNacelles.toString();

        var PassengersLabel = <HTMLElement>document.getElementById("passengers-label");
        PassengersLabel.innerHTML = "Passengers: " + this._numberOfPassengers.toString();

        var CrewLabel = <HTMLElement>document.getElementById("crew-label");
        CrewLabel.innerHTML = "Crew: " + this._numberOfCrew.toString();
    }
}