Added user currency to charge page

utils/YenToUserCurrency.go

@@ -0,0 +1,35 @@
+package utils
+
+import (
+	"fmt"
+
+	"github.com/animenotifier/arn"
+	"github.com/pariz/gountries"
+)
+
+// Current currency rates
+const (
+	yenToEuro   = 0.0075
+	yenToDollar = 0.0093
+)
+
+var countryQuery = gountries.New()
+
+// YenToUserCurrency converts the Yen price to the user currency.
+func YenToUserCurrency(amount int, user *arn.User) string {
+	if user == nil || user.Location.CountryName == "" {
+		return fmt.Sprintf("%.2f $", float64(amount)*yenToDollar)
+	}
+
+	country, err := countryQuery.FindCountryByName(user.Location.CountryName)
+
+	if err != nil {
+		return fmt.Sprintf("%.2f $", float64(amount)*yenToDollar)
+	}
+
+	if arn.Contains(country.Currencies, "EUR") {
+		return fmt.Sprintf("%.2f €", float64(amount)*yenToEuro)
+	}
+
+	return fmt.Sprintf("%.2f $", float64(amount)*yenToDollar)
+}