Make the payment service more modular

src/MistoxWebsite.Server/Controllers/PaymentController.cs

@@ -1,5 +1,6 @@
 using Microsoft.AspNetCore.Cors;
 using Microsoft.AspNetCore.Mvc;
+using MistoxWebsite.Server.Controllers.Payment;
 using MistoxWebsite.Server.Services.DatabaseService;
 using MistoxWebsite.Shared;
 using Newtonsoft.Json;
@@ -22,74 +23,25 @@ namespace MistoxWebsite.Server.Controllers {
         [HttpPost]
         public async Task<string> GetPaymentKey( [FromQuery] string userID ) {
 
-            // Stored Variables
             string OrderNumber = Guid.NewGuid().ToString().Substring(0,10);
-            int subtotal = 0;
-
-            // Get the user purchasing the items
-            string UserID = "";
             Shared.Account? acc = await _databaseService.GetAccount(userID);
-            if( acc != null ) {
+            if (acc != null) {
-                UserID = acc.ID.ToString();
+                List<Cart> cart = await _databaseService.GetCart(acc);
-                List<Cart> cart = await _databaseService.GetCart( acc );
 
-                // build Recipt and calculate Tax
+                IPayment PaymentPlugin = new StripeIntent(_databaseService);
-                var options = new CalculationCreateOptions{
-                    Currency = "usd",
-                    CustomerDetails = new CalculationCustomerDetailsOptions{
-                        AddressSource = "billing",
-                    },
-                    Expand = new List<string>(){ "line_items" },
-                    LineItems = new List<CalculationLineItemOptions>()
-                };
 
-                List<int> prods = new List<int>();
+                (bool, string) PaymentResponse = await PaymentPlugin.Purchase(OrderNumber, acc, cart);
-
+                if (PaymentResponse.Item1) {
-                // Add items to receipt
+                    return PaymentResponse.Item2;
-                foreach( Cart items in cart ) {
-                    Shared.Product? product = await _databaseService.GetProduct( items.ProductID );
-                    if (product != null){
-                        prods.Add(product.ID);
-                        if( product != null ) {
-                            subtotal += product.Cost;
-                            options.LineItems.Add( new CalculationLineItemOptions {
-                                Amount = product.Cost,
-                                TaxCode = "txcd_10201000",          // Tax code for downloadable digital games
-                                Quantity = 1,
-                                Reference = product.Name,
-                                TaxBehavior = "exclusive"
-                            } );
                 }
+                else {
+                    Console.WriteLine("An error has occured in the payment plugin\n\n");
+                    Console.WriteLine(PaymentResponse.Item2);
+                    Console.WriteLine("\n");
+                    return "0";
                 }
 
             }
-
-                var service = new CalculationService();
-                Calculation result = service.Create( options );
-
-                string csv = "";
-                foreach (int cur in prods ) {
-                    csv = csv + cur + ",";
-                }
-
-                // Crate Payment Intent
-                PaymentIntentCreateOptions paymentIntent = new PaymentIntentCreateOptions(){
-                    Amount = result.AmountTotal,
-                    Currency = "usd",
-                    Metadata = new Dictionary<string, string> {
-                        { "ordernumber", OrderNumber },
-                        { "user", UserID },
-                        { "products", csv },
-                        { "subtotal", subtotal.ToString() },
-                        { "total", result.AmountTotal.ToString() }
-                    },
-                    StatementDescriptor = "Mistox.Net #" + OrderNumber
-                };
-
-                PaymentIntentService intentService = new PaymentIntentService();
-                PaymentIntent x = await intentService.CreateAsync( paymentIntent );
-                return x.ClientSecret;
-            }
             return "0";
         }
 

src/MistoxWebsite.Server/Controllers/PaymentMethods/IPayment.cs

@@ -0,0 +1,11 @@
+using MistoxWebsite.Shared;
+
+namespace MistoxWebsite.Server.Controllers.Payment {
+
+    public interface IPayment {
+
+        public Task<(bool, string)> Purchase(string OrderNumber, Account user, List<Cart> cart);
+
+    }
+
+}

src/MistoxWebsite.Server/Controllers/PaymentMethods/StripeIntents.cs

@@ -0,0 +1,88 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using MistoxWebsite.Server.Controllers.Payment;
+using MistoxWebsite.Server.Services.DatabaseService;
+using MistoxWebsite.Shared;
+using Stripe;
+using Stripe.Tax;
+
+namespace MistoxWebsite.Server.Controllers {
+
+    public class StripeIntent : IPayment {
+
+        DatabaseService _databaseService;
+
+        public StripeIntent( DatabaseService databaseService ) {
+            _databaseService = databaseService;
+        }
+
+        public async Task<(bool, string)> Purchase(string OrderNumber, Shared.Account user, List<Cart> cart) {
+            try {
+                // build Recipt and calculate Tax
+                var options = new CalculationCreateOptions {
+                    Currency = "usd",
+                    CustomerDetails = new CalculationCustomerDetailsOptions {
+                        AddressSource = "billing",
+                    },
+                    Expand = new List<string>() { "line_items" },
+                    LineItems = new List<CalculationLineItemOptions>()
+                };
+
+                List<int> prods = new List<int>();
+
+                // Add items to receipt
+                int subtotal = 0;
+                foreach (Cart items in cart) {
+                    Shared.Product? product = await _databaseService.GetProduct(items.ProductID);
+                    if (product != null) {
+                        prods.Add(product.ID);
+                        if (product != null) {
+                            subtotal += product.Cost;
+                            options.LineItems.Add(new CalculationLineItemOptions {
+                                Amount = product.Cost,
+                                TaxCode = "txcd_10201000",          // Tax code for downloadable digital games
+                                Quantity = 1,
+                                Reference = product.Name,
+                                TaxBehavior = "exclusive"
+                            });
+                        }
+                    }
+
+                }
+
+                var service = new CalculationService();
+                Calculation result = service.Create(options);
+
+                string csv = "";
+                foreach (int cur in prods) {
+                    csv = csv + cur + ",";
+                }
+
+                // Crate Payment Intent
+                PaymentIntentCreateOptions paymentIntent = new PaymentIntentCreateOptions() {
+                    Amount = result.AmountTotal,
+                    Currency = "usd",
+                    Metadata = new Dictionary<string, string> {
+                            { "ordernumber", OrderNumber },
+                            { "user", user.ID.ToString() },
+                            { "products", csv },
+                            { "subtotal", subtotal.ToString() },
+                            { "total", result.AmountTotal.ToString() }
+                        },
+                    StatementDescriptor = "Mistox.Net #" + OrderNumber
+                };
+
+                PaymentIntentService intentService = new PaymentIntentService();
+                PaymentIntent x = await intentService.CreateAsync(paymentIntent);
+
+                return (true, x.ClientSecret);
+            } catch(Exception e) {
+                return (false, e.ToString());
+            }
+
+        }
+
+    }
+
+}