Add date of values

Frontend/lib/mih_packages/calculator/package_tools/currency_exchange_rate.dart

@@ -30,19 +30,21 @@ class _CurrencyExchangeRateState extends State<CurrencyExchangeRate> {
   Future<void> submitForm() async {
     String fromCurrencyCode = _fromCurrencyController.text.split(" - ")[0];
     String toCurrencyCode = _toCurrencyController.text.split(" - ")[0];
+    List<String> dateValue = [];
     double exchangeRate = 0;
     await MihCurrencyExchangeRateServices.getCurrencyExchangeValue(
             fromCurrencyCode, toCurrencyCode)
         .then((amount) {
-      exchangeRate = amount;
+      dateValue = amount;
     });
+    exchangeRate = double.parse(dateValue[1]);
     double exchangeValue =
         double.parse(_fromAmountController.text) * exchangeRate;
 
     print(
-        "${_fromAmountController.text} | $fromCurrencyCode\n$exchangeValue | $toCurrencyCode");
+        "Date: ${dateValue[0]}\n${_fromAmountController.text} | $fromCurrencyCode\n$exchangeValue | $toCurrencyCode");
-    displayResult(_fromAmountController.text, fromCurrencyCode, exchangeValue,
+    displayResult(dateValue[0], _fromAmountController.text, fromCurrencyCode,
-        toCurrencyCode);
+        exchangeValue, toCurrencyCode);
   }
 
   void clearInput() {
@@ -52,7 +54,7 @@ class _CurrencyExchangeRateState extends State<CurrencyExchangeRate> {
     _toAmountController.clear();
   }
 
-  void displayResult(String amount, String fromCurrencyCode,
+  void displayResult(String date, String amount, String fromCurrencyCode,
       double exchangeValue, String toCurrencyCode) {
     showDialog(
       context: context,
@@ -71,6 +73,19 @@ class _CurrencyExchangeRateState extends State<CurrencyExchangeRate> {
               color: MzanziInnovationHub.of(context)!.theme.secondaryColor(),
             ),
             const SizedBox(height: 20),
+            FittedBox(
+              child: Text(
+                "Values as at $date",
+                textAlign: TextAlign.center,
+                style: TextStyle(
+                  fontSize: 30,
+                  fontWeight: FontWeight.bold,
+                  color:
+                      MzanziInnovationHub.of(context)!.theme.secondaryColor(),
+                ),
+              ),
+            ),
+            const SizedBox(height: 10),
             Row(
               mainAxisAlignment: MainAxisAlignment.spaceEvenly,
               children: [

Frontend/lib/mih_services/mih_currency_exchange_rate_services.dart

@@ -38,7 +38,7 @@ class MihCurrencyExchangeRateServices {
     }
   }
 
-  static Future<double> getCurrencyExchangeValue(
+  static Future<List<String>> getCurrencyExchangeValue(
     String fromCurrencyCode,
     String toCurrencyCode,
   ) async {
@@ -48,19 +48,19 @@ class MihCurrencyExchangeRateServices {
       final Map<String, dynamic> jsonResponse = json.decode(response.body);
       final Map<String, dynamic>? baseCurrencyData =
           jsonResponse[fromCurrencyCode];
-
+      final List<String> dateValue = [];
       if (baseCurrencyData != null) {
-        // Access the value for the target currency (e.g., "usd")
         final dynamic rateValue = baseCurrencyData[toCurrencyCode];
+        final String date = jsonResponse["date"];
 
         if (rateValue is num) {
-          // Check if it's a number (int or double)
+          dateValue.add(date);
-          return rateValue.toDouble();
+          dateValue.add(rateValue.toString());
+          return dateValue;
         } else {
-          // Handle cases where the rate might not be a number or is missing
           print(
               'Warning: Rate for $toCurrencyCode in $fromCurrencyCode is not a number or missing.');
-          return 0;
+          return ["Error", "0"];
         }
       } else {
         throw Exception(