Implemented tax collection for subscriptions (#1017)

* Implemented tax collection for subscriptions

* Cleanup for Sales Tax

* Cleanup for Sales Tax

* Changes a constraint to an index for checking purposes

* Added and implemented a ReadById method for TaxRate

* Code review fixes for Tax Rate implementation

* Code review fixes for Tax Rate implementation

* Made the SalesTax migration script rerunnable

src/Core/Models/Api/Request/Organizations/OrganizationUpgradeRequestModel.cs

@@ -14,6 +14,8 @@ namespace Bit.Core.Models.Api
         [Range(0, 99)]
         public short? AdditionalStorageGb { get; set; }
         public bool PremiumAccessAddon { get; set; }
+        public string BillingAddressCountry { get; set; }
+        public string BillingAddressPostalCode { get; set; }
 
         public OrganizationUpgrade ToOrganizationUpgrade()
         {
@@ -23,7 +25,12 @@ namespace Bit.Core.Models.Api
                 AdditionalStorageGb = AdditionalStorageGb.GetValueOrDefault(),
                 BusinessName = BusinessName,
                 Plan = PlanType,
-                PremiumAccessAddon = PremiumAccessAddon
+                PremiumAccessAddon = PremiumAccessAddon,
+                TaxInfo = new TaxInfo()
+                {
+                    BillingAddressCountry = BillingAddressCountry,
+                    BillingAddressPostalCode = BillingAddressPostalCode
+                }
             };
         }
     }

src/Core/Models/Api/Response/TaxRateResponseModel.cs

@@ -0,0 +1,29 @@
+using System;
+using Bit.Core.Models.Table;
+
+namespace Bit.Core.Models.Api
+{
+    public class TaxRateResponseModel : ResponseModel
+    {
+        public TaxRateResponseModel(TaxRate taxRate)
+            : base("profile")
+        {
+            if (taxRate == null)
+            {
+                throw new ArgumentNullException(nameof(taxRate));
+            }
+
+            Id = taxRate.Id;
+            Country = taxRate.Country;
+            State = taxRate.State;
+            PostalCode = taxRate.PostalCode;
+            Rate = taxRate.Rate;
+        }
+
+        public string Id { get; set; }
+        public string Country { get; set; }
+        public string State { get; set; }
+        public string PostalCode { get; set; }
+        public decimal Rate { get; set; }
+    }
+}

src/Core/Models/Business/OrganizationUpgrade.cs

@@ -9,5 +9,6 @@ namespace Bit.Core.Models.Business
         public short AdditionalSeats { get; set; }
         public short AdditionalStorageGb { get; set; }
         public bool PremiumAccessAddon { get; set; }
+        public TaxInfo TaxInfo { get; set; }
     }
 }

src/Core/Models/Business/SubscriptionCreateOptions.cs

@@ -0,0 +1,85 @@
+using Bit.Core.Models.Table;
+using Stripe;
+using System.Collections.Generic;
+
+namespace Bit.Core.Models.Business
+{
+    public class OrganizationSubscriptionOptionsBase : Stripe.SubscriptionCreateOptions
+    {
+        public OrganizationSubscriptionOptionsBase(Organization org, StaticStore.Plan plan, TaxInfo taxInfo, int additionalSeats, int additionalStorageGb, bool premiumAccessAddon)
+        {
+            Items = new List<SubscriptionItemOptions>();
+            Metadata = new Dictionary<string, string>
+            {
+                [org.GatewayIdField()] = org.Id.ToString()
+            };
+
+            if (plan.StripePlanId != null)
+            {
+                Items.Add(new SubscriptionItemOptions
+                {
+                    Plan = plan.StripePlanId,
+                    Quantity = 1
+                });
+            }
+
+            if (additionalSeats > 0 && plan.StripeSeatPlanId != null)
+            {
+                Items.Add(new SubscriptionItemOptions
+                {
+                    Plan = plan.StripeSeatPlanId,
+                    Quantity = additionalSeats
+                });
+            }
+
+            if (additionalStorageGb > 0)
+            {
+                Items.Add(new SubscriptionItemOptions
+                {
+                    Plan = plan.StripeStoragePlanId,
+                    Quantity = additionalStorageGb
+                });
+            }
+
+            if (premiumAccessAddon && plan.StripePremiumAccessPlanId != null)
+            {
+                Items.Add(new SubscriptionItemOptions
+                {
+                    Plan = plan.StripePremiumAccessPlanId,
+                    Quantity = 1
+                });
+            }
+
+            if (!string.IsNullOrWhiteSpace(taxInfo?.StripeTaxRateId))
+            {
+                DefaultTaxRates = new List<string>{ taxInfo.StripeTaxRateId };
+            }
+        }
+    }
+
+    public class OrganizationPurchaseSubscriptionOptions : OrganizationSubscriptionOptionsBase 
+    {
+        public OrganizationPurchaseSubscriptionOptions(
+            Organization org, StaticStore.Plan plan,
+            TaxInfo taxInfo, int additionalSeats = 0,
+            int additionalStorageGb = 0, bool premiumAccessAddon = false) :
+            base(org, plan, taxInfo, additionalSeats, additionalStorageGb, premiumAccessAddon)
+        {
+            OffSession = true;
+            TrialPeriodDays = plan.TrialPeriodDays;
+        }
+    }
+
+    public class OrganizationUpgradeSubscriptionOptions : OrganizationSubscriptionOptionsBase
+    {
+        public OrganizationUpgradeSubscriptionOptions(
+            string customerId, Organization org,
+            StaticStore.Plan plan, TaxInfo taxInfo,
+            int additionalSeats = 0, int additionalStorageGb = 0,
+            bool premiumAccessAddon = false) : 
+            base(org, plan, taxInfo, additionalSeats, additionalStorageGb, premiumAccessAddon)
+        {
+            Customer = customerId;
+        }
+    }
+}

src/Core/Models/Business/TaxInfo.cs

@@ -14,6 +14,7 @@
                 _taxIdType = null;
             }
         }
+        public string StripeTaxRateId { get; set; }
         public string BillingAddressLine1 { get; set; }
         public string BillingAddressLine2 { get; set; }
         public string BillingAddressCity { get; set; }

src/Core/Models/Table/TaxRate.cs

@@ -0,0 +1,18 @@
+namespace Bit.Core.Models.Table
+{
+   public class TaxRate: ITableObject<string>
+   {
+      public string Id { get; set; }
+      public string Country { get; set; }
+      public string State { get; set; }
+      public string PostalCode { get; set; }
+      public decimal Rate { get; set; }
+      public bool Active { get; set; } 
+
+      public void SetNewId()
+      {
+         // Id is created by Stripe, should exist before this gets called
+         return;
+      }
+   }
+}