56 lines
1.8 KiB
TypeScript
56 lines
1.8 KiB
TypeScript
import type { AssetsManifest } from "@remix-run/react/dist/entry";
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declare const ASSET_CACHE: string;
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declare const self: ServiceWorkerGlobalScope;
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export default async function handleMessage(event: ExtendableMessageEvent) {
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if (event.data.type === "SYNC_REMIX_MANIFEST") {
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return handleSyncRemixManifest(event);
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}
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}
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async function handleSyncRemixManifest(event: ExtendableMessageEvent) {
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console.debug("Caching routes modules");
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const manifest: AssetsManifest = event.data.manifest;
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const routes = [...Object.values(manifest.routes), manifest.entry];
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const assetsToCache: string[] = [];
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for (const route of routes) {
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assetsToCache.push(route.module);
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if (route.imports) {
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assetsToCache.push(...route.imports);
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}
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}
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await purgeStaticAssets(assetsToCache);
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await cacheStaticAssets(assetsToCache);
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}
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async function cacheStaticAssets(assetsToCache: string[]) {
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const cachePromises: Map<string, Promise<void>> = new Map();
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const assetCache = await caches.open(ASSET_CACHE);
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assetsToCache.forEach((assetUrl) => cachePromises.set(assetUrl, cacheAsset(assetUrl)));
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await Promise.all(cachePromises.values());
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async function cacheAsset(assetUrl: string) {
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if (await assetCache.match(assetUrl)) {
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// no need to update the asset, it has a unique hash in its name
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return;
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}
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console.debug("Caching asset", assetUrl);
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return assetCache.add(assetUrl).catch((error) => {
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console.debug(`Failed to cache asset ${assetUrl}:`, error);
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});
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}
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}
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async function purgeStaticAssets(assetsToCache: string[]) {
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const assetCache = await caches.open(ASSET_CACHE);
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const cachedAssets = await assetCache.keys();
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const cachesToDelete = cachedAssets.filter((asset) => !assetsToCache.includes(new URL(asset.url).pathname));
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await Promise.all(cachesToDelete.map((asset) => assetCache.delete(asset)));
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}
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