refactored program

FarmmapsApi/FarmmapsProgram.cs

@@ -0,0 +1,52 @@
+using System.Net.Http;
+using System.Threading.Tasks;
+using FarmmapsApi.HttpMessageHandlers;
+using FarmmapsApi.Models;
+using FarmmapsApi.Services;
+using IdentityModel.Client;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace FarmmapsApi
+{
+    public abstract class FarmmapsProgram<T> where T : class, IApplication
+    {
+        public async Task Start(string[] args)
+        {
+            IConfiguration config = new ConfigurationBuilder()
+                .AddJsonFile("appsettings.json", false, true)
+                .Build();
+
+            var configuration = config.Get<Configuration>();
+
+            var serviceCollection = new ServiceCollection()
+                .AddSingleton(configuration)
+                .AddSingleton<IDiscoveryCache>(sp =>
+                {
+                    var httpFactory = sp.GetRequiredService<IHttpClientFactory>();
+                    return new DiscoveryCache(configuration.DiscoveryEndpointUrl,
+                        () => httpFactory.CreateClient());
+                })
+                .AddSingleton<HttpClientSettings>()
+                .AddSingleton<FarmmapsEventHub>()
+                .AddSingleton<T>()
+                .AddTransient<OpenIdConnectService>()
+                .AddTransient<FarmmapsAuthenticationHandler>()
+                .AddTransient<GeneralService>()
+                .AddHttpClient<FarmmapsApiService>()
+                .AddHttpMessageHandler<FarmmapsAuthenticationHandler>()
+                .Services;
+            
+
+            Configure(serviceCollection);
+
+            var serviceProvider = serviceCollection.BuildServiceProvider();
+            await serviceProvider.GetService<FarmmapsApiService>().AuthenticateAsync();
+//            await serviceProvider.GetService<FarmmapsEventHub>().StartEventHub();
+
+            await serviceProvider.GetRequiredService<T>().RunAsync();
+        }
+
+        protected abstract void Configure(IServiceCollection serviceCollection);
+    }
+}