feat(pwa): Cache-Manifest-Diff-Funktion + Tests
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Pure Funktion diffManifest(current, cached) → {toAdd, toRemove}.
Vom SW beim Update-Sync genutzt: neue Rezept-IDs nachladen,
gelöschte aus dem Cache räumen. 5 Tests decken add/remove/
beides/unchanged/empty-cache ab.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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src/lib/sw/diff-manifest.ts
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14
src/lib/sw/diff-manifest.ts
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// Vergleicht die aktuelle Rezept-ID-Liste (vom Server) mit dem, was
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// der Cache schon hat. Der SW nutzt das Delta, um nur Neue zu laden
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// und Gelöschte abzuräumen.
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export type ManifestDiff = { toAdd: number[]; toRemove: number[] };
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export function diffManifest(currentIds: number[], cachedIds: number[]): ManifestDiff {
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const current = new Set(currentIds);
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const cached = new Set(cachedIds);
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const toAdd: number[] = [];
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const toRemove: number[] = [];
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for (const id of current) if (!cached.has(id)) toAdd.push(id);
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for (const id of cached) if (!current.has(id)) toRemove.push(id);
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return { toAdd, toRemove };
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}
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