rc 1.0

lib/currency.ts

@@ -0,0 +1,51 @@
+/**
+ * Currency conversion utilities
+ * Database stores prices in EUR
+ * Countries in CHF_COUNTRIES see CHF (converted from EUR)
+ * All other countries see EUR
+ */
+
+// List of country codes that use CHF currency
+// Add or remove country codes here to change which countries get CHF pricing
+export const CHF_COUNTRIES = ['CH'] as const
+
+// EUR to CHF exchange rate
+// Using a fixed rate - in production, you might want to fetch this from an API
+// Current approximate rate: 1 EUR ≈ 0.97 CHF (as of 2025)
+// Note: This is approximate. For production, consider using a real-time exchange rate API
+const EUR_TO_CHF_RATE = 0.97
+
+/**
+ * Convert EUR amount to CHF
+ */
+export function convertEurToChf(eurAmount: number): number {
+  return eurAmount * EUR_TO_CHF_RATE
+}
+
+/**
+ * Get the currency to use based on country code
+ * Returns 'CHF' for countries in CHF_COUNTRIES, 'EUR' for all other countries
+ */
+export function getCurrencyForCountry(countryCode: string | null): 'CHF' | 'EUR' {
+  return countryCode && CHF_COUNTRIES.includes(countryCode as any) ? 'CHF' : 'EUR'
+}
+
+/**
+ * Convert price based on country
+ * If country is in CHF_COUNTRIES, convert EUR to CHF
+ * Otherwise, return EUR amount as-is
+ */
+export function convertPriceForCountry(priceInEur: number, countryCode: string | null): number {
+  if (countryCode && CHF_COUNTRIES.includes(countryCode as any)) {
+    return convertEurToChf(priceInEur)
+  }
+  return priceInEur
+}
+
+/**
+ * Get currency symbol for display
+ */
+export function getCurrencySymbol(currency: 'CHF' | 'EUR'): string {
+  return currency === 'CHF' ? 'CHF' : 'EUR'
+}
+