feat(frontend): fixed exchange rates

7project/frontend/src/pages/Dashboard.tsx

@@ -12,28 +12,31 @@ function formatAmount(n: number) {
   return new Intl.NumberFormat(undefined, { minimumFractionDigits: 2, maximumFractionDigits: 2 }).format(n);
 }
 
-// Add this new component to your Dashboard.tsx file, above the Dashboard component
+//https://unirateapi.com/
+
 
 // Define the structure for the rate data we care about
-type CnbRate = {
+type RateData = {
   currencyCode: string;
   rate: number;
 };
 
 // The part of the API response structure we need
-type CnbApiResponse = {
-  rates: Array<{
-    amount: number;
-    currencyCode: string;
-    rate: number;
-  }>;
+type UnirateApiResponse = {
+  base: string;
+  rates: { [key: string]: number };
+  // We'll also check for error formats just in case
+  message?: string;
+  error?: {
+    info: string;
+  };
 };
 
 // The currencies you want to display
 const TARGET_CURRENCIES = ['EUR', 'USD', 'NOK'];
 
 function CurrencyRates() {
-  const [rates, setRates] = useState<CnbRate[]>([]);
+  const [rates, setRates] = useState<RateData[]>([]);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
 
@@ -42,31 +45,49 @@ function CurrencyRates() {
       setLoading(true);
       setError(null);
 
-      // Get today's date in YYYY-MM-DD format for the API
-      const today = new Date().toISOString().split('T')[0];
-      const CNB_API_URL = `https://api.cnb.cz/cnbapi/exrates/daily?date=${today}&lang=EN`;
+      const API_KEY = import.meta.env.VITE_UNIRATE_API_KEY;
+
+      // We need to get the CZK rate as well, to use it for conversion
+      const allSymbols = [...TARGET_CURRENCIES, 'CZK'].join(',');
+
+      // We remove the `base` param, as the API seems to force base=USD
+      const UNIRATE_API_URL = `https://unirateapi.com/api/rates?api_key=${API_KEY}&symbols=${allSymbols}`;
 
       try {
-        const res = await fetch(CNB_API_URL);
-        if (!res.ok) {
-          // This can happen on weekends/holidays or if rates aren't posted yet
-          throw new Error(`Rates unavailable (Status: ${res.status})`);
-        }
-        const data: CnbApiResponse = await res.json();
+        const res = await fetch(UNIRATE_API_URL);
+        const data: UnirateApiResponse = await res.json();
 
+        // --- THIS IS THE NEW, CORRECTED LOGIC ---
+
+        // 1. Check if the 'rates' object exists. If not, it's an error.
         if (!data.rates) {
-          throw new Error("Invalid API response");
+          let errorMessage = data.message || (data.error ? data.error.info : 'Invalid API response');
+          throw new Error(errorMessage || 'Could not load rates');
         }
 
-        const filteredRates = data.rates
-          .filter(rate => TARGET_CURRENCIES.includes(rate.currencyCode))
-          .map(rate => ({
-            currencyCode: rate.currencyCode,
-            // Handle 'amount' field (e.g., JPY is per 100)
-            rate: rate.rate / rate.amount
-          }));
+        // 2. Check that we got the base currency (USD) and our conversion currency (CZK)
+        if (data.base !== 'USD' || !data.rates.CZK) {
+          throw new Error('API response is missing required data for conversion (USD or CZK)');
+        }
 
-        setRates(filteredRates);
+        // 3. Get our main conversion factor
+        const czkPerUsd = data.rates.CZK; // e.g., 23.0
+
+        // 4. Calculate the rates for our target currencies
+        const formattedRates = TARGET_CURRENCIES.map(code => {
+          const targetPerUsd = data.rates[code]; // e.g., 0.9 for EUR
+
+          // This calculates: (CZK per USD) / (TARGET per USD) = CZK per TARGET
+          // e.g. (23.0 CZK / 1 USD) / (0.9 EUR / 1 USD) = 25.55 CZK / 1 EUR
+          const rate = czkPerUsd / targetPerUsd;
+
+          return {
+            currencyCode: code,
+            rate: rate,
+          };
+        });
+
+        setRates(formattedRates);
       } catch (err: any) {
         setError(err.message || 'Could not load rates');
       } finally {
@@ -108,10 +129,26 @@ function CurrencyRates() {
           )) : <li style={{color: '#8a91b4'}}>No rates found.</li>}
         </ul>
       )}
+
+      <a
+        href="https://unirateapi.com"
+        target="_blank"
+        rel="noopener noreferrer"
+        style={{
+          display: 'block',
+          marginTop: '1rem',
+          fontSize: '0.8em',
+          color: '#8a91b4', // Muted color
+          textDecoration: 'none'
+        }}
+      >
+        Exchange Rates By UniRateAPI
+      </a>
     </div>
   );
 }
 
+
 export default function Dashboard({ onLogout }: { onLogout: () => void }) {
   const [current, setCurrent] = useState<'home' | 'manual' | 'account' | 'appearance'>('home');
   const [transactions, setTransactions] = useState<Transaction[]>([]);