samyandClaude Opus 5.5
ce8129703f
A manifest and icons rendered from icon.svg make the app installable. The native build emits a service worker that precaches exactly the built files and passes everything else to the network, so ROMs never reach its cache. New versions wait for the player's Update, which saves before reloading. Savegames offers installation, iPhone steps and persistent storage, and a full disk gets its own save error. Acceptance on physical iPhone and Android devices remains. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
101 lines
3.3 KiB
JavaScript
101 lines
3.3 KiB
JavaScript
import { createHash } from "node:crypto";
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import { readdirSync, readFileSync, statSync, writeFileSync } from "node:fs";
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import { join, relative, resolve } from "node:path";
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/** Every file under `directory`, as paths relative to it with "/". */
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export function listFiles(directory) {
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const files = [];
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const walk = (dir) => {
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for (const name of readdirSync(dir)) {
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const path = join(dir, name);
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if (statSync(path).isDirectory()) walk(path);
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else files.push(relative(directory, path).split("\\").join("/"));
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}
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};
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walk(directory);
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return files;
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}
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/** The app shell's service worker. It precaches `files` (paths relative
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* to the worker) under a cache named by `version`, serves them first and
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* leaves every other request to the network. A new version waits until
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* the page asks it to take over, so play is never reloaded by surprise. */
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export function serviceWorkerSource(files, version) {
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const shell = [
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"./",
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...files.filter((file) => file !== "index.html").map((file) => `./${file}`),
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];
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return `// Generated at build time by scripts/service-worker.mjs.
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const CACHE = ${JSON.stringify(`crystal-shell-${version}`)};
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const SHELL = ${JSON.stringify(shell)};
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const SCOPE = new URL("./", self.location).pathname;
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self.addEventListener("install", (event) => {
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event.waitUntil(caches.open(CACHE).then((cache) => cache.addAll(SHELL)));
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});
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self.addEventListener("activate", (event) => {
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event.waitUntil(
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(async () => {
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for (const key of await caches.keys())
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if (key.startsWith("crystal-shell-") && key !== CACHE) await caches.delete(key);
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await self.clients.claim();
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})(),
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);
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});
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self.addEventListener("message", (event) => {
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if (event.data === "skip-waiting") self.skipWaiting();
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});
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self.addEventListener("fetch", (event) => {
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const request = event.request;
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if (request.method !== "GET") return;
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const url = new URL(request.url);
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if (url.origin !== self.location.origin || !url.pathname.startsWith(SCOPE)) return;
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event.respondWith(
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(async () => {
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const cache = await caches.open(CACHE);
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// Pages load the cached shell; other files are cached by URL. Shell
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// files never vary, but hosts may send Vary: Origin, which module
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// script requests would otherwise fail to match.
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const cached =
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request.mode === "navigate"
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? await cache.match("./", { ignoreVary: true })
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: await cache.match(request, { ignoreSearch: true, ignoreVary: true });
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return cached ?? fetch(request);
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})(),
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);
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});
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`;
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}
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/** Vite plugin: write sw.js next to the native build's files once they
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* exist, versioned by their names and contents. */
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export function serviceWorkerPlugin() {
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let outDir = "dist";
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return {
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name: "crystal-service-worker",
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apply: "build",
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configResolved(config) {
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outDir = resolve(config.root, config.build.outDir);
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},
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writeBundle: {
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sequential: true,
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order: "post",
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handler() {
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const files = listFiles(outDir)
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.filter((file) => file !== "sw.js")
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.sort();
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const hash = createHash("sha256");
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for (const file of files)
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hash.update(file).update(readFileSync(join(outDir, file)));
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writeFileSync(
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join(outDir, "sw.js"),
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serviceWorkerSource(files, hash.digest("hex").slice(0, 16)),
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);
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},
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},
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};
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}
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