import { EntityNames, Floor, Player } from '.'; import { type Component } from '../components'; const randomId = () => (Math.random() * 1_000_000_000).toString(); export abstract class Entity { public id: string; public components: Map; public name: string; constructor(name: string, id: string = randomId()) { this.name = name; this.id = id; this.components = new Map(); } public addComponent(component: Component) { this.components.set(component.name, component); } public getComponent(name: string): T { if (!this.hasComponent(name)) { throw new Error('Entity does not have component ' + name); } return this.components.get(name) as T; } public getComponents(): Component[] { return Array.from(this.components.values()); } public hasComponent(name: string): boolean { return this.components.has(name); } public static from(entityName: string, id: string, args: any): Entity { let entity: Entity; switch (entityName) { case EntityNames.Player: const player = new Player(); player.setFrom(args); entity = player; break; case EntityNames.Floor: const floor = new Floor(args.floorWidth); floor.setFrom(args); entity = floor; break; default: throw new Error('.from() Entity type not implemented: ' + entityName); } entity.id = id; return entity; } public abstract setFrom(args: Record): void; public abstract serialize(): Record; }