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Przeglądarkowy hash!

This commit is contained in:
Artur Kuś 2025-02-08 14:31:54 +01:00
parent 8569fc5310
commit cb770a73c0
1 changed files with 23 additions and 13 deletions
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26
src/app/asset-calculator/asset-calculator.component.ts
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@ -11,6 +11,7 @@ import { format, parse } from 'date-fns';
import { createHash } from 'crypto'; import { createHash } from 'crypto';
class AssetLifeChangeWrapper { class AssetLifeChangeWrapper {
when = signal<string>(YearMonth.todayTxt()); when = signal<string>(YearMonth.todayTxt());
initial = signal<number>(0); initial = signal<number>(0);
@ -62,7 +63,7 @@ export class AssetCalculatorComponent {
this.saveState(this.controlsToAsset()); this.saveState(this.controlsToAsset());
} }
private restoreState() { private async restoreState() {
const savedAsset = localStorage.getItem(STORAGE_KEY); const savedAsset = localStorage.getItem(STORAGE_KEY);
const savedResults = localStorage.getItem(CACHE_KEY); const savedResults = localStorage.getItem(CACHE_KEY);
const savedHash = localStorage.getItem(HASH_KEY); const savedHash = localStorage.getItem(HASH_KEY);
@ -71,10 +72,9 @@ export class AssetCalculatorComponent {
const asset: Asset = JSON.parse(savedAsset); const asset: Asset = JSON.parse(savedAsset);
this.assetToControls(asset); this.assetToControls(asset);
// Generujemy nowy hash // 🛠️ Poczekaj na hash
const newHash = this.generateHash(asset); const newHash = await this.generateHash(asset);
// Jeśli hash jest taki sam, ładujemy wyniki z cache
if (savedHash === newHash && savedResults) { if (savedHash === newHash && savedResults) {
this.amortizationsSignal.set(JSON.parse(savedResults)); this.amortizationsSignal.set(JSON.parse(savedResults));
console.log("✅ Załadowano wyniki z cache – brak przeliczeń."); console.log("✅ Załadowano wyniki z cache – brak przeliczeń.");
@ -86,9 +86,11 @@ export class AssetCalculatorComponent {
} }
} }
private saveState(asset: Asset) {
private async saveState(asset: Asset) {
localStorage.setItem(STORAGE_KEY, JSON.stringify(asset)); localStorage.setItem(STORAGE_KEY, JSON.stringify(asset));
localStorage.setItem(HASH_KEY, this.generateHash(asset)); // Zapisujemy nowy hash const hash = await this.generateHash(asset);
localStorage.setItem(HASH_KEY, hash);
} }
private assetToControls(asset: Asset) { private assetToControls(asset: Asset) {
@ -164,7 +166,8 @@ export class AssetCalculatorComponent {
datepicker.close(); datepicker.close();
} }
private generateHash(asset: Asset): string {
private async generateHash(asset: Asset): Promise<string> {
const data = JSON.stringify({ const data = JSON.stringify({
initialValue: asset.life[0]?.initial, initialValue: asset.life[0]?.initial,
rate: asset.depreciationMethods[0]?.rate, rate: asset.depreciationMethods[0]?.rate,
@ -173,6 +176,13 @@ export class AssetCalculatorComponent {
lifeChanges: asset.life.map(lc => ({ when: lc.when, initial: lc.initial })) lifeChanges: asset.life.map(lc => ({ when: lc.when, initial: lc.initial }))
}); });
return createHash('sha256').update(data).digest('hex'); const encoder = new TextEncoder();
const dataBuffer = encoder.encode(data);
const hashBuffer = await crypto.subtle.digest('SHA-256', dataBuffer);
return Array.from(new Uint8Array(hashBuffer))
.map(byte => byte.toString(16).padStart(2, '0'))
.join('');
} }
} }