feat: complete advanced Sudoku workbench

2026-08-31 08:20:30 +02:00
parent 8ca9300ab3
commit 0a1bdc1a8c
99 changed files with 20793 additions and 923 deletions
@@ -0,0 +1,119 @@
+/* Sudoku Tools offline worker. This file intentionally has no dependencies. */
+const CACHE_PREFIX = "sudoku-tools-shell-";
+const CACHE_VERSION = "v1";
+const CACHE_NAME = `${CACHE_PREFIX}${CACHE_VERSION}`;
+const CORE_ASSETS = ["./", "./manifest.webmanifest", "./favicon.svg"];
+const BUILD_ASSET_PATTERN =
+  /(?:(?:\.\/)?assets\/)?[A-Za-z0-9][A-Za-z0-9._-]*-[A-Za-z0-9_-]{6,}\.(?:css|js|json|png|svg|wasm)/gu;
+
+async function cacheAssetTree(cache, assetUrl, discovered, depth = 0) {
+  const url = new URL(assetUrl, self.registration.scope).href;
+  if (discovered.has(url)) return;
+  discovered.add(url);
+  const response = await fetch(url, { cache: "no-cache" });
+  if (!response.ok) return;
+  await cache.put(url, response.clone());
+  const contentType = response.headers.get("content-type") ?? "";
+  if (depth >= 3 || !/(?:javascript|text\/css)/iu.test(contentType)) return;
+  const source = await response.text();
+  await Promise.all(
+    [...source.matchAll(BUILD_ASSET_PATTERN)].map((match) => {
+      const reference = match[0];
+      const base = reference.includes("assets/")
+        ? self.registration.scope
+        : url;
+      return cacheAssetTree(
+        cache,
+        new URL(reference, base).href,
+        discovered,
+        depth + 1,
+      );
+    }),
+  );
+}
+
+async function cacheDocumentAssets(cache) {
+  const response = await fetch("./", { cache: "no-cache" });
+  if (!response.ok) throw new Error("Could not cache the application shell.");
+  await cache.put("./", response.clone());
+  const html = await response.text();
+  const urls = new Set(CORE_ASSETS.slice(1));
+  for (const match of html.matchAll(/(?:src|href)=["']([^"'#]+)["']/giu)) {
+    const raw = match[1];
+    if (raw === undefined) continue;
+    const resolved = new URL(raw, self.registration.scope);
+    if (resolved.origin === self.location.origin) urls.add(resolved.href);
+  }
+  const canonicalUrls = new Set([new URL("./", self.registration.scope).href]);
+  await Promise.all(
+    [...urls].map((url) => cacheAssetTree(cache, url, canonicalUrls)),
+  );
+  await Promise.all(
+    (await cache.keys())
+      .filter((request) => !canonicalUrls.has(request.url))
+      .map((request) => cache.delete(request)),
+  );
+}
+
+self.addEventListener("install", (event) => {
+  event.waitUntil(
+    caches
+      .open(CACHE_NAME)
+      .then(cacheDocumentAssets)
+      .then(() => self.skipWaiting()),
+  );
+});
+
+self.addEventListener("activate", (event) => {
+  event.waitUntil(
+    caches
+      .keys()
+      .then((keys) =>
+        Promise.all(
+          keys
+            .filter((key) => key.startsWith(CACHE_PREFIX) && key !== CACHE_NAME)
+            .map((key) => caches.delete(key)),
+        ),
+      )
+      .then(() => self.clients.claim()),
+  );
+});
+
+self.addEventListener("fetch", (event) => {
+  const request = event.request;
+  if (request.method !== "GET") return;
+  const url = new URL(request.url);
+  if (url.origin !== self.location.origin) return;
+
+  if (request.mode === "navigate") {
+    event.respondWith(
+      fetch(request)
+        .then(async (response) => {
+          if (response.ok) {
+            const cache = await caches.open(CACHE_NAME);
+            await cache.put("./", response.clone());
+          }
+          return response;
+        })
+        .catch(async () => {
+          const cached = await caches.match("./");
+          return cached ?? Response.error();
+        }),
+    );
+    return;
+  }
+
+  event.respondWith(
+    caches.match(request).then(
+      (cached) =>
+        cached ??
+        fetch(request).then(async (response) => {
+          if (response.ok && response.type === "basic") {
+            const cache = await caches.open(CACHE_NAME);
+            await cache.put(request, response.clone());
+          }
+          return response;
+        }),
+    ),
+  );
+});