playcanvas/build/playcanvas/src/framework/handlers/bundle.js

Open-source WebGL/WebGPU 3D engine for the web

import { Bundle } from "../bundle/bundle.js";
import { Untar } from "./untar.js";
import { ResourceHandler } from "./handler.js";
class BundleHandler extends ResourceHandler {
	constructor(app) {
		super(app, "bundle");
		this._assets = app.assets;
	}
	_fetchRetries(url, options, retries = 0) {
		return new Promise((resolve, reject) => {
			const tryFetch = () => {
				fetch(url, options).then(resolve).catch((err) => {
					retries++;
					if (retries < this.maxRetries) {
						tryFetch();
					} else {
						reject(err);
					}
				});
			};
			tryFetch();
		});
	}
	load(url, callback) {
		if (typeof url === "string") {
			url = {
				load: url,
				original: url
			};
		}
		this._fetchRetries(url.load, {
			mode: "cors"
		}, this.maxRetries).then((res) => {
			const bundle = new Bundle();
			callback(null, bundle);
			const untar = new Untar(res, this._assets.prefix);
			untar.on("file", (file) => {
				bundle.addFile(file.name, file.data);
			});
			untar.on("done", () => {
				bundle.loaded = true;
			});
			untar.on("error", (err) => {
				callback(err);
			});
		}).catch((err) => {
			callback(err);
		});
	}
	open(url, bundle) {
		return bundle;
	}
}
export {
	BundleHandler
};