[euvr] Separate Billing Payment/History APIs (#1932)

* [euvr] Separate Billing Payment/History APIs

* Formatting

* Created AccountsBillingController // Deprecated GetBilling // Simplified PaymentService helpers

* Formatting

src/Api/Controllers/AccountsBillingController.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Threading.Tasks;
+using Bit.Api.Models.Response;
+using Bit.Core.Services;
+using Bit.Core.Utilities;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Bit.Api.Controllers
+{
+    [Route("accounts/billing")]
+    [Authorize("Application")]
+    public class AccountsBillingController : Controller
+    {
+        private readonly IPaymentService _paymentService;
+        private readonly IUserService _userService;
+
+        public AccountsBillingController(
+            IPaymentService paymentService,
+            IUserService userService)
+        {
+            _paymentService = paymentService;
+            _userService = userService;
+        }
+
+        [HttpGet("history")]
+        [SelfHosted(NotSelfHostedOnly = true)]
+        public async Task<BillingHistoryResponseModel> GetBillingHistory()
+        {
+            var user = await _userService.GetUserByPrincipalAsync(User);
+            if (user == null)
+            {
+                throw new UnauthorizedAccessException();
+            }
+
+            var billingInfo = await _paymentService.GetBillingHistoryAsync(user);
+            return new BillingHistoryResponseModel(billingInfo);
+        }
+
+        [HttpGet("payment-method")]
+        [SelfHosted(NotSelfHostedOnly = true)]
+        public async Task<BillingPaymentResponseModel> GetPaymentMethod()
+        {
+            var user = await _userService.GetUserByPrincipalAsync(User);
+            if (user == null)
+            {
+                throw new UnauthorizedAccessException();
+            }
+
+            var billingInfo = await _paymentService.GetBillingBalanceAndSourceAsync(user);
+            return new BillingPaymentResponseModel(billingInfo);
+        }
+    }
+}

src/Api/Controllers/AccountsController.cs

@@ -626,6 +626,7 @@ namespace Bit.Api.Controllers
             };
         }
 
+        [Obsolete("2022-04-01 Use separate Billing History/Payment APIs, left for backwards compatability with older clients")]
         [HttpGet("billing")]
         [SelfHosted(NotSelfHostedOnly = true)]
         public async Task<BillingResponseModel> GetBilling()