[BEEEP] [PM-18518] Cleanup StripePaymentService (#5435)

src/Core/Billing/Extensions/CustomerExtensions.cs

@@ -22,4 +22,9 @@ public static class CustomerExtensions
     /// <returns></returns>
     public static bool HasTaxLocationVerified(this Customer customer) =>
         customer?.Tax?.AutomaticTax == StripeConstants.AutomaticTaxStatus.Supported;
+
+    public static decimal GetBillingBalance(this Customer customer)
+    {
+        return customer != null ? customer.Balance / 100M : default;
+    }
 }

src/Core/Billing/Extensions/SubscriberExtensions.cs

@@ -0,0 +1,26 @@
+using Bit.Core.Entities;
+
+namespace Bit.Core.Billing.Extensions;
+
+public static class SubscriberExtensions
+{
+    /// <summary>
+    /// We are taking only first 30 characters of the SubscriberName because stripe provide for 30 characters  for
+    /// custom_fields,see the link: https://stripe.com/docs/api/invoices/create
+    /// </summary>
+    /// <param name="subscriber"></param>
+    /// <returns></returns>
+    public static string GetFormattedInvoiceName(this ISubscriber subscriber)
+    {
+        var subscriberName = subscriber.SubscriberName();
+
+        if (string.IsNullOrWhiteSpace(subscriberName))
+        {
+            return string.Empty;
+        }
+
+        return subscriberName.Length <= 30
+            ? subscriberName
+            : subscriberName[..30];
+    }
+}