first commit

lib/currency.dart

@@ -0,0 +1,31 @@
+import 'package:shared_preferences/shared_preferences.dart';
+
+///______APP_Default_currency________________________
+const String appDefaultCurrency = '\$';
+const String appDefaultCurrencyName = 'US Dollar';
+
+///______Dynamic_currency_variables___________________
+String currency = appDefaultCurrency;
+String currencyName = appDefaultCurrencyName;
+
+class CurrencyMethods {
+  void removeCurrencyFromLocalDatabase() async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.remove('currency');
+    await prefs.remove('currencyName');
+  }
+
+  Future<void> saveCurrencyDataInLocalDatabase({required String? selectedCurrencySymbol, required String? selectedCurrencyName}) async {
+    print('This is currency from apis: $selectedCurrencyName - And symbol is : $selectedCurrencySymbol');
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setString('currency', selectedCurrencySymbol ?? appDefaultCurrency);
+    await prefs.setString('currencyName', selectedCurrencyName ?? appDefaultCurrencyName);
+    await getCurrencyFromLocalDatabase();
+  }
+
+  Future<void> getCurrencyFromLocalDatabase() async {
+    final prefs = await SharedPreferences.getInstance();
+    currency = prefs.getString('currency') ?? appDefaultCurrency;
+    currencyName = prefs.getString('currencyName') ?? appDefaultCurrencyName;
+  }
+}