Files
kochwas/src/lib/sw/cache-strategy.ts
hsiegeln dc15cf04a9
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feat(shopping): Service-Worker network-only fuer /api/shopping-list/*
Einkaufsliste-Endpunkte duerfen vom SW nie gecached werden — Liste
ist zustaendig fuer Check-States und muss immer live vom Server
gelesen werden. Test + resolveStrategy-Erweiterung analog zu den
anderen online-only-Endpunkten.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-21 23:28:17 +02:00

46 lines
1.5 KiB
TypeScript

export type CacheStrategy = 'shell' | 'network-first' | 'images' | 'network-only';
type RequestShape = { url: string; method: string };
// Pure function — sole decision-maker for "which strategy for this request?".
// Called by the service worker for every fetch event.
export function resolveStrategy(req: RequestShape): CacheStrategy {
// All write methods: never cache.
if (req.method !== 'GET' && req.method !== 'HEAD') return 'network-only';
// Reduce URL to pathname — query string not needed for matching
// except that online-only endpoints need no special handling here.
const path = req.url.startsWith('http') ? new URL(req.url).pathname : req.url.split('?')[0];
// Explicitly online-only GETs
if (
path === '/api/recipes/import' ||
path === '/api/recipes/preview' ||
path === '/api/recipes/extract-from-photo' ||
path.startsWith('/api/recipes/search/web') ||
path.startsWith('/api/shopping-list')
) {
return 'network-only';
}
// Images
if (path.startsWith('/images/')) return 'images';
// App-shell: build assets and known static files
if (
path.startsWith('/_app/') ||
path === '/manifest.webmanifest' ||
path === '/icon.svg' ||
path === '/icon-192.png' ||
path === '/icon-512.png' ||
path === '/favicon.ico' ||
path === '/robots.txt'
) {
return 'shell';
}
// Everything else: recipe pages, API reads, lists — network-first with
// timeout fallback to cache (handled in service-worker.ts).
return 'network-first';
}