paymentservice with stripe & braintree implem.

src/Core/Services/Implementations/BraintreePaymentService.cs

@@ -0,0 +1,72 @@
+using System;
+using System.Threading.Tasks;
+using Bit.Core.Models.Table;
+using Braintree;
+
+namespace Bit.Core.Services
+{
+    public class BraintreePaymentService : IPaymentService
+    {
+        private readonly BraintreeGateway _gateway;
+
+        public BraintreePaymentService(
+            GlobalSettings globalSettings)
+        {
+            _gateway = new BraintreeGateway
+            {
+                Environment = globalSettings.Braintree.Production ?
+                    Braintree.Environment.PRODUCTION : Braintree.Environment.SANDBOX,
+                MerchantId = globalSettings.Braintree.MerchantId,
+                PublicKey = globalSettings.Braintree.PublicKey,
+                PrivateKey = globalSettings.Braintree.PrivateKey
+            };
+        }
+
+        public async Task PurchasePremiumAsync(User user, string paymentToken, short additionalStorageGb)
+        {
+            var customerResult = await _gateway.Customer.CreateAsync(new CustomerRequest
+            {
+                PaymentMethodNonce = paymentToken,
+                Email = user.Email
+            });
+
+            if(!customerResult.IsSuccess())
+            {
+                // error, throw something
+            }
+
+            var subId = "u" + user.Id.ToString("N").ToLower() +
+                    Utilities.CoreHelpers.RandomString(3, upper: false, numeric: false);
+
+            var subRequest = new SubscriptionRequest
+            {
+                Id = subId,
+                PaymentMethodToken = paymentToken,
+                PlanId = "premium-annually"
+            };
+
+            if(additionalStorageGb > 0)
+            {
+                subRequest.AddOns.Add = new AddAddOnRequest[]
+                {
+                    new AddAddOnRequest
+                    {
+                        InheritedFromId = "storage-gb-annually",
+                        Quantity = additionalStorageGb
+                    }
+                };
+            }
+
+            var subResult = await _gateway.Subscription.CreateAsync(subRequest);
+
+            if(!subResult.IsSuccess())
+            {
+                await _gateway.Customer.DeleteAsync(customerResult.Target.Id);
+                // error, throw something
+            }
+
+            user.StripeCustomerId = customerResult.Target.Id;
+            user.StripeSubscriptionId = subResult.Target.Id;
+        }
+    }
+}