trainsim/state/states/LoadState.ts

68 lines
2.0 KiB
TypeScript

import { Doodler, Vector } from "@bearmetal/doodler";
import { bootstrapInputs } from "../../inputs.ts";
import { getContextItem, setContextItem } from "../../lib/context.ts";
import { InputManager } from "../../lib/input.ts";
import { ResourceManager } from "../../lib/resources.ts";
import { StraightTrack } from "../../track/shapes.ts";
import { TrackSystem } from "../../track/system.ts";
import { State } from "../machine.ts";
import { States } from "./index.ts";
export class LoadState extends State<States> {
override name: States = States.LOAD;
override validTransitions: Set<States> = new Set([
States.RUNNING,
]);
layers: number[] = [];
override update(): void {
// noop
}
override start(): void {
const track = this.loadTrack() ?? new TrackSystem([new StraightTrack()]);
setContextItem("track", track);
const trains = this.loadTrains() ?? [];
setContextItem("trains", trains);
const resources = new ResourceManager();
setContextItem("resources", resources);
const inputManager = new InputManager();
setContextItem("inputManager", inputManager);
bootstrapInputs();
resources.set("engine-sprites", new Image());
resources.get<HTMLImageElement>("engine-sprites")!.src =
"/sprites/EngineSprites.png";
resources.ready().then(() => {
this.stateMachine.transitionTo(States.RUNNING);
});
const doodler = getContextItem<Doodler>("doodler");
this.layers.push(doodler.createLayer((_, __, dTime) => {
doodler.clearRect(new Vector(0, 0), doodler.width, doodler.height);
doodler.fillRect(new Vector(0, 0), doodler.width, doodler.height, {
color: "#302040",
});
}));
}
override stop(): void {
// noop
}
private loadTrack() {
const track = TrackSystem.deserialize(
JSON.parse(localStorage.getItem("track") || "[]"),
);
return track;
}
private loadTrains() {
const trains = JSON.parse(localStorage.getItem("trains") || "[]");
return trains;
}
}