Update webapp template to use top-level statements & minimal hosting API

Contributes to #33947 #33944

Author: DamianEdwards

src/ProjectTemplates/Web.ProjectTemplates/content/RazorPagesWeb-CSharp/Program.cs

@@ -2,25 +2,140 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
+#if (OrganizationalAuth || IndividualB2CAuth)
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.Identity.Web;
+using Microsoft.Identity.Web.UI;
+using Microsoft.AspNetCore.Authentication.OpenIdConnect;
+using Microsoft.AspNetCore.Authorization;
+#endif
+using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
+#if (RequiresHttps)
+using Microsoft.AspNetCore.HttpsPolicy;
+#endif
+#if (IndividualLocalAuth)
+using Microsoft.AspNetCore.Identity;
+using Microsoft.AspNetCore.Identity.UI;
+#endif
+#if (OrganizationalAuth)
+using Microsoft.AspNetCore.Mvc.Authorization;
+#endif
+#if (IndividualLocalAuth)
+using Microsoft.EntityFrameworkCore;
+#endif
 using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
+#if(MultiOrgAuth)
+using Microsoft.IdentityModel.Tokens;
+#endif
+#if (GenerateGraph)
+using Microsoft.Graph;
+#endif
+#if (IndividualLocalAuth)
+using Company.WebApplication1.Data;
+#endif
 
-namespace Company.WebApplication1
+var builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+#if (IndividualLocalAuth)
+builder.Services.AddDbContext<ApplicationDbContext>(options =>
+#if (UseLocalDB)
+    options.UseSqlServer(
+        builder.Configuration.GetConnectionString("DefaultConnection")));
+#else
+    options.UseSqlite(
+        builder.Configuration.GetConnectionString("DefaultConnection")));
+#endif
+builder.Services.AddDatabaseDeveloperPageExceptionFilter();
+builder.Services.AddDefaultIdentity<IdentityUser>(options => options.SignIn.RequireConfirmedAccount = true)
+    .AddEntityFrameworkStores<ApplicationDbContext>();
+#elif (OrganizationalAuth)
+#if (GenerateApiOrGraph)
+var initialScopes = builder.Configuration.GetValue<string>("DownstreamApi:Scopes")?.Split(' ');
+
+#endif
+builder.Services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)
+#if (GenerateApiOrGraph)
+    .AddMicrosoftIdentityWebApp(builder.Configuration.GetSection("AzureAd"))
+        .EnableTokenAcquisitionToCallDownstreamApi(initialScopes)
+#if (GenerateApi)
+            .AddDownstreamWebApi("DownstreamApi", builder.Configuration.GetSection("DownstreamApi"))
+#endif
+#if (GenerateGraph)
+            .AddMicrosoftGraph(builder.Configuration.GetSection("DownstreamApi"))
+#endif
+            .AddInMemoryTokenCaches();
+#else
+    .AddMicrosoftIdentityWebApp(builder.Configuration.GetSection("AzureAd"));
+#endif
+#elif (IndividualB2CAuth)
+#if (GenerateApi)
+var initialScopes = builder.Configuration.GetValue<string>("DownstreamApi:Scopes")?.Split(' ');
+
+#endif
+builder.Services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)
+#if (GenerateApi)
+    .AddMicrosoftIdentityWebApp(builder.Configuration.GetSection("AzureAdB2C"))
+        .EnableTokenAcquisitionToCallDownstreamApi(initialScopes)
+            .AddDownstreamWebApi("DownstreamApi", builder.Configuration.GetSection("DownstreamApi"))
+            .AddInMemoryTokenCaches();
+#else
+    .AddMicrosoftIdentityWebApp(builder.Configuration.GetSection("AzureAdB2C"));
+#endif
+#endif
+#if (OrganizationalAuth)
+
+builder.Services.AddAuthorization(options =>
+{
+    // By default, all incoming requests will be authorized according to the default policy.
+    options.FallbackPolicy = options.DefaultPolicy;
+});
+builder.Services.AddRazorPages()
+    .AddMvcOptions(options => {})
+    .AddMicrosoftIdentityUI();
+#elif (IndividualB2CAuth)
+builder.Services.AddRazorPages()
+    .AddMicrosoftIdentityUI();
+#else
+builder.Services.AddRazorPages();
+#endif
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
 {
-    public class Program
-    {
-        public static void Main(string[] args)
-        {
-            CreateHostBuilder(args).Build().Run();
-        }
-
-        public static IHostBuilder CreateHostBuilder(string[] args) =>
-            Host.CreateDefaultBuilder(args)
-                .ConfigureWebHostDefaults(webBuilder =>
-                {
-                    webBuilder.UseStartup<Startup>();
-                });
-    }
+    app.UseDeveloperExceptionPage();
+#if (IndividualLocalAuth)
+    app.UseMigrationsEndPoint();
+#endif
 }
+else
+{
+    app.UseExceptionHandler("/Error");
+#if (RequiresHttps)
+    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
+    app.UseHsts();
+}
+
+app.UseHttpsRedirection();
+#else
+}
+#endif
+app.UseStaticFiles();
+
+#if (OrganizationalAuth || IndividualAuth)
+app.UseAuthentication();
+#endif
+app.UseAuthorization();
+
+app.MapRazorPages();
+#if (IndividualB2CAuth || OrganizationalAuth)
+app.MapControllers();
+#endif
+
+app.Run();