4f4b12f039
- Auth: TOTP replay protection with counter tracking, constant-time backup code comparison, atomic lockout increment, per-token logout - Invoices/PDFs: net-based VAT calculation, dangerous URL scheme stripping in cleanQuillHtml, orders-pdf error handling - Orders: reject item changes on status transition, cascading delete cleanup, take:1 with orderBy - Projects: atomic rename collision handling, MIME/extension validation, empty customer name rejection - Attendance: Czech public holiday awareness in frontend fund calculation, leave_hours 0 handling, invalid date NaN guard, bounded per-month queries in workfund - Users/Admin: profile audit logging + password validation, session revocation guard, session ID validation, dashboard DB aggregation, soft-deleted record protection in scope templates - Frontend: FormField label linkage, Pagination ARIA, error handling in OrderConfirmationModal, 401 propagation, GPS emoji hidden from screen readers, table sort state fix, geolocation race/abort cleanup, Leaflet popup DOM safety, Vehicles toggleActive minimal body, CompanySettings ref mutation fix, OfferDetail unlock abort, AttendanceBalances combined fetches - Utils: env validation, Puppeteer concurrency mutex, invoice alert cron cleanup on shutdown, body limit alignment, TOTP error logging, trustProxy from env, symlink rejection, rate cache Map usage Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
68 lines
1.9 KiB
TypeScript
68 lines
1.9 KiB
TypeScript
/**
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* Czech National Bank (ČNB) exchange rate service.
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* Fetches daily rates and caches them.
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* API: https://api.cnb.cz/cnbapi/exrates/daily
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*/
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interface CnbRate {
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currencyCode: string;
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rate: number;
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amount: number;
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}
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const rateCache = new Map<string, Record<string, number>>();
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async function fetchRatesForDate(
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date?: string,
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): Promise<Record<string, number>> {
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const key = date || "today";
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if (rateCache.has(key)) return rateCache.get(key)!;
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try {
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let url = "https://api.cnb.cz/cnbapi/exrates/daily?lang=EN";
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if (date) url += `&date=${date}`;
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const response = await fetch(url);
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if (!response.ok) throw new Error(`CNB API: ${response.status}`);
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const data = (await response.json()) as { rates: CnbRate[] };
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const rates: Record<string, number> = { CZK: 1 };
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for (const r of data.rates) {
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rates[r.currencyCode] = r.rate / r.amount;
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}
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rateCache.set(key, rates);
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return rates;
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} catch (err) {
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console.error("Failed to fetch CNB exchange rates:", err);
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if (rateCache.has("today")) return rateCache.get("today")!;
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throw new Error("Nepodařilo se získat aktuální kurzy z ČNB");
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}
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}
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/** Convert an amount from a given currency to CZK using CNB rates */
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export async function toCzk(
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amount: number,
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currency: string,
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date?: string,
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): Promise<number> {
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if (currency === "CZK") return amount;
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const rates = await fetchRatesForDate(date);
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const rate = rates[currency];
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if (!rate) throw new Error(`Neznámá měna: ${currency}`);
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return Math.round(amount * rate * 100) / 100;
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}
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/** Get CNB rate for a currency (CZK per 1 unit), optionally for a specific date */
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export async function getRate(
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currency: string,
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date?: string,
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): Promise<number> {
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if (currency === "CZK") return 1;
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const rates = await fetchRatesForDate(date);
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const rate = rates[currency];
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if (!rate) throw new Error(`Neznámá měna: ${currency}`);
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return rate;
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}
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