OOP game example

game-oop.ts

interface IWearable {
    wear: () => void;
}

interface IPlayable {}

class GameObject {
    toString() {
        return JSON.stringify(this, null, "  ");
    }
}

class Item extends GameObject {
    public ID: number;
    public name: string;

    constructor(ID: number, name: string) {
        super();
        this.ID = ID;
        this.name = name;
    }
}

class Weapon extends Item {
    public damage: number;

    constructor(ID: number, name: string, damage: number) {
        super(ID, name);
        this.damage = damage;
    }
}

class Armor extends Item implements IWearable {
    public protection: number;

    constructor(ID: number, name: string, protection: number) {
        super(ID, name);
        this.protection = protection;
    }

    wear() {}
}

class Inventory extends GameObject {
    public items: Item[];

    constructor() {
        super();
        this.items = [];
    }

    sort() {
        this.items = this.items.sort((a, b) => a.ID - b.ID);
    }
}

class Entity extends GameObject {
    public ID: number;
    public name: string;

    constructor(ID: number, name: string) {
        super();
        this.ID = ID;
        this.name = name;
    }
}

class Player extends Entity implements IPlayable {
    public inventory: Inventory;

    constructor(ID: number, name: string) {
        super(ID, name);
        this.inventory = new Inventory();
    }
}