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Adds sitemap generation
Implements sitemap generation to improve SEO. Adds a new service to extract static routes from the application's controllers and actions. These routes are then used, along with content-based routes, to generate a sitemap.xml file in the wwwroot directory during application startup. This helps search engines crawl and index the site more effectively.
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‎Directory.Packages.props‎

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<PackageVersion Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="9.0.0" />
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<PackageVersion Include="Newtonsoft.Json" Version="13.0.3" />
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<PackageVersion Include="Octokit" Version="14.0.0" />
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<PackageVersion Include="DotnetSitemapGenerator" Version="1.0.4" />
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<PackageVersion Include="xunit" Version="2.9.3" />
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<PackageVersion Include="xunit.runner.visualstudio" Version="3.0.1" />
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</ItemGroup>

‎EssentialCSharp.Web.Tests/RouteConfigurationServiceTests.cs‎

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using EssentialCSharp.Web.Services;
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using Microsoft.AspNetCore.Mvc.Testing;
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using Microsoft.Extensions.DependencyInjection;
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namespace EssentialCSharp.Web.Tests;
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public class RouteConfigurationServiceTests : IClassFixture<WebApplicationFactory<Program>>
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{
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private readonly WebApplicationFactory<Program> _Factory;
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private readonly IRouteConfigurationService _RouteConfigurationService;
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public RouteConfigurationServiceTests(WebApplicationFactory<Program> factory)
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{
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_Factory = factory;
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// Get the service from the DI container to test with real routes
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var scope = _Factory.Services.CreateScope();
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_RouteConfigurationService = scope.ServiceProvider.GetRequiredService<IRouteConfigurationService>();
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}
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[Fact]
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public void GetStaticRoutes_ShouldReturnExpectedRoutes()
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{
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// Act
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var routes = _RouteConfigurationService.GetStaticRoutes().ToList();
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// Assert
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Assert.NotEmpty(routes);
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// Check for expected routes from the HomeController
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Assert.Contains("home", routes);
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Assert.Contains("about", routes);
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Assert.Contains("guidelines", routes);
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Assert.Contains("announcements", routes);
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Assert.Contains("termsofservice", routes);
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}
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[Fact]
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public void GetStaticRoutes_ShouldIncludeAllHomeControllerRoutes()
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{
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// Act
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var routes = _RouteConfigurationService.GetStaticRoutes().ToHashSet(StringComparer.OrdinalIgnoreCase);
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// Assert - check all expected routes from HomeController
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var expectedRoutes = new[] { "home", "about", "guidelines", "announcements", "termsofservice" };
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foreach (var expectedRoute in expectedRoutes)
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{
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Assert.True(routes.Contains(expectedRoute),
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$"Expected route '{expectedRoute}' was not found in discovered routes: [{string.Join(", ", routes)}]");
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}
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}
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[Fact]
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public void GetStaticRoutes_ShouldNotIncludeIdentityRoutes()
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{
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// Act
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var routes = _RouteConfigurationService.GetStaticRoutes();
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// Assert - ensure no Identity area routes are included
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Assert.DoesNotContain("identity", routes, StringComparer.OrdinalIgnoreCase);
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}
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}

‎EssentialCSharp.Web/Controllers/BaseController.cs‎

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using Microsoft.AspNetCore.Mvc;
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using Microsoft.AspNetCore.Mvc.Filters;
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using EssentialCSharp.Web.Services;
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namespace EssentialCSharp.Web.Controllers;
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public abstract class BaseController : Controller
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{
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private readonly IRouteConfigurationService _routeConfigurationService;
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protected BaseController(IRouteConfigurationService routeConfigurationService)
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{
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_routeConfigurationService = routeConfigurationService;
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}
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public override void OnActionExecuting(ActionExecutingContext context)
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{
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// Automatically add static routes to all views
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ViewBag.StaticRoutes = System.Text.Json.JsonSerializer.Serialize(_routeConfigurationService.GetStaticRoutes());
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base.OnActionExecuting(context);
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}
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}

‎EssentialCSharp.Web/EssentialCSharp.Web.csproj‎

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<PackageReference Include="Newtonsoft.Json" />
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<PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" />
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<PackageReference Include="Octokit" />
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<PackageReference Include="DotnetSitemapGenerator" />
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</ItemGroup>
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<ItemGroup>
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<Content Update="wwwroot\images\00mindmap.svg">

‎EssentialCSharp.Web/Helpers/SitemapXmlHelpers.cs‎

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using DotnetSitemapGenerator;
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using DotnetSitemapGenerator.Serialization;
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using Microsoft.AspNetCore.Mvc.Infrastructure;
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namespace EssentialCSharp.Web.Helpers;
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public static class SitemapXmlHelpers
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{
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private const string RootUrl = "https://essentialcsharp.com/";
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public static void EnsureSitemapHealthy(List<SiteMapping> siteMappings)
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{
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var groups = siteMappings.GroupBy(item => new { item.ChapterNumber, item.PageNumber });
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foreach (var group in groups)
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{
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try
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{
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SiteMapping result = group.Single(item => item.IncludeInSitemapXml);
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}
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catch (Exception ex)
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{
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throw new InvalidOperationException($"Sitemap error: Chapter {group.Key.ChapterNumber}, Page {group.Key.PageNumber} has more than one canonical link, or none: {ex.Message}", ex);
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}
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}
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}
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public static void GenerateAndSerializeSitemapXml(DirectoryInfo wwwrootDirectory, List<SiteMapping> siteMappings, ILogger logger, IActionDescriptorCollectionProvider actionDescriptorCollectionProvider)
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{
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GenerateSitemapXml(wwwrootDirectory, siteMappings, actionDescriptorCollectionProvider, out string xmlPath, out List<SitemapNode> nodes);
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XmlSerializer sitemapProvider = new();
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sitemapProvider.Serialize(new SitemapModel(nodes), xmlPath, true);
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logger.LogInformation("sitemap.xml successfully written to {XmlPath}", xmlPath);
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}
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public static void GenerateSitemapXml(DirectoryInfo wwwrootDirectory, List<SiteMapping> siteMappings, IActionDescriptorCollectionProvider actionDescriptorCollectionProvider, out string xmlPath, out List<SitemapNode> nodes)
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{
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xmlPath = Path.Combine(wwwrootDirectory.FullName, "sitemap.xml");
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DateTime newDateTime = DateTime.UtcNow;
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// Start with the root URL
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nodes = new() {
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new($"{RootUrl}")
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{
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LastModificationDate = newDateTime,
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ChangeFrequency = ChangeFrequency.Daily,
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Priority = 1.0M
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}
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};
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// Add routes dynamically discovered from controllers (excluding Identity routes)
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var controllerRoutes = GetControllerRoutes(actionDescriptorCollectionProvider);
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foreach (var route in controllerRoutes)
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{
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nodes.Add(new($"{RootUrl.TrimEnd('/')}{route}")
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{
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LastModificationDate = newDateTime,
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ChangeFrequency = GetChangeFrequencyForRoute(route),
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Priority = GetPriorityForRoute(route)
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});
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}
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// Add site mappings from content
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nodes.AddRange(siteMappings.Where(item => item.IncludeInSitemapXml).Select<SiteMapping, SitemapNode>(siteMapping => new($"{RootUrl}{siteMapping.Keys.First()}")
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{
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LastModificationDate = newDateTime,
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ChangeFrequency = ChangeFrequency.Daily,
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Priority = 0.8M
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}));
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}
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private static List<string> GetControllerRoutes(IActionDescriptorCollectionProvider actionDescriptorCollectionProvider)
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{
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var routes = new List<string>();
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foreach (var actionDescriptor in actionDescriptorCollectionProvider.ActionDescriptors.Items)
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{
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// Skip Identity area routes
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if (actionDescriptor.RouteValues.TryGetValue("area", out var area) && area == "Identity")
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continue;
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// Skip the default fallback route (Index action in HomeController)
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if (actionDescriptor.RouteValues.TryGetValue("action", out var action) && action == "Index")
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continue;
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// Skip Error actions
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if (action == "Error")
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continue;
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// Get the route template or attribute route
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if (actionDescriptor.AttributeRouteInfo?.Template is string template)
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{
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// Clean up the template (remove parameters, etc.)
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var cleanRoute = template.TrimStart('/');
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if (!string.IsNullOrEmpty(cleanRoute) && !routes.Contains($"/{cleanRoute}"))
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{
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routes.Add($"/{cleanRoute}");
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}
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}
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}
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return routes.Distinct().OrderBy(r => r).ToList();
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}
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private static ChangeFrequency GetChangeFrequencyForRoute(string route)
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{
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return route.ToLowerInvariant() switch
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{
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"/termsofservice" => ChangeFrequency.Yearly,
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"/announcements" => ChangeFrequency.Monthly,
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"/guidelines" => ChangeFrequency.Monthly,
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_ => ChangeFrequency.Monthly
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};
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}
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private static decimal GetPriorityForRoute(string route)
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{
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return route.ToLowerInvariant() switch
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{
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"/home" => 0.5M,
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"/about" => 0.5M,
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"/announcements" => 0.5M,
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"/guidelines" => 0.9M,
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"/termsofservice" => 0.2M,
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_ => 0.5M
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};
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}
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}
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public class InvalidItemException : Exception
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{
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public InvalidItemException(string? message) : base(message)
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{
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}
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public InvalidItemException(string? message, Exception exception) : base(message, exception)
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{
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}
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}

‎EssentialCSharp.Web/Program.cs‎

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using EssentialCSharp.Web.Areas.Identity.Services.PasswordValidators;
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using EssentialCSharp.Web.Data;
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using EssentialCSharp.Web.Extensions;
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using EssentialCSharp.Web.Helpers;
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using EssentialCSharp.Web.Middleware;
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using EssentialCSharp.Web.Services;
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using EssentialCSharp.Web.Services.Referrals;
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using Mailjet.Client;
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using Microsoft.AspNetCore.HttpOverrides;
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using Microsoft.AspNetCore.Identity;
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using Microsoft.AspNetCore.Identity.UI.Services;
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using Microsoft.AspNetCore.Mvc.Infrastructure;
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using Microsoft.EntityFrameworkCore;
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namespace EssentialCSharp.Web;
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builder.Services.AddRazorPages();
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builder.Services.AddCaptchaService(builder.Configuration.GetSection(CaptchaOptions.CaptchaSender));
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builder.Services.AddSingleton<ISiteMappingService, SiteMappingService>();
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builder.Services.AddScoped<IRouteConfigurationService, RouteConfigurationService>();
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builder.Services.AddHostedService<DatabaseMigrationService>();
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builder.Services.AddScoped<IReferralService, ReferralService>();
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WebApplication app = builder.Build();
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// Configure the HTTP request pipeline.
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if (!app.Environment.IsDevelopment())
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{
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app.MapFallbackToController("Index", "Home");
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// Generate sitemap.xml at startup
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var wwwrootDirectory = new DirectoryInfo(app.Environment.WebRootPath);
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var siteMappingService = app.Services.GetRequiredService<ISiteMappingService>();
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var actionDescriptorCollectionProvider = app.Services.GetRequiredService<IActionDescriptorCollectionProvider>();
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var logger = app.Services.GetRequiredService<ILogger<Program>>();
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try
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{
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SitemapXmlHelpers.EnsureSitemapHealthy(siteMappingService.SiteMappings.ToList());
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SitemapXmlHelpers.GenerateAndSerializeSitemapXml(wwwrootDirectory, siteMappingService.SiteMappings.ToList(), logger, actionDescriptorCollectionProvider);
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logger.LogInformation("Sitemap.xml generation completed successfully during application startup");
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}
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catch (Exception ex)
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{
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logger.LogError(ex, "Failed to generate sitemap.xml during application startup");
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// Continue startup even if sitemap generation fails
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}
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app.Run();
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}
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}

‎EssentialCSharp.Web/Services/IRouteConfigurationService.cs‎

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using Microsoft.AspNetCore.Mvc;
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using Microsoft.AspNetCore.Mvc.Infrastructure;
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using System.Reflection;
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namespace EssentialCSharp.Web.Services;
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public interface IRouteConfigurationService
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{
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IEnumerable<string> GetStaticRoutes();
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}
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public class RouteConfigurationService : IRouteConfigurationService
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{
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private readonly IActionDescriptorCollectionProvider _ActionDescriptorCollectionProvider;
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private readonly HashSet<string> _StaticRoutes;
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public RouteConfigurationService(IActionDescriptorCollectionProvider actionDescriptorCollectionProvider)
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{
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_ActionDescriptorCollectionProvider = actionDescriptorCollectionProvider;
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_StaticRoutes = ExtractStaticRoutes();
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}
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public IEnumerable<string> GetStaticRoutes()
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{
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return _StaticRoutes;
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}
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private HashSet<string> ExtractStaticRoutes()
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{
30+
var routes = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
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// Get all action descriptors
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var actionDescriptors = _ActionDescriptorCollectionProvider.ActionDescriptors.Items;
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foreach (var actionDescriptor in actionDescriptors)
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{
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// Look for route attributes
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if (actionDescriptor.AttributeRouteInfo?.Template != null)
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{
40+
string template = actionDescriptor.AttributeRouteInfo.Template;
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// Remove leading slash and add to our set
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string routePath = template.TrimStart('/').ToLowerInvariant();
44+
routes.Add(routePath);
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}
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// Skip Identity area routes
48+
if (actionDescriptor.RouteValues.TryGetValue("area", out var area) && area == "Identity")
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continue;
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// Skip the default fallback route (Index action in HomeController)
52+
if (actionDescriptor.RouteValues.TryGetValue("action", out var action) && action == "Index")
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continue;
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// Skip Error actions
56+
if (action == "Error")
57+
continue;
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59+
// For actions without attribute routes, use conventional routing
60+
if (actionDescriptor.AttributeRouteInfo?.Template == null &&
61+
actionDescriptor.RouteValues.TryGetValue("action", out var actionName) &&
62+
actionDescriptor.RouteValues.TryGetValue("controller", out var controllerName))
63+
{
64+
if (controllerName?.Equals("Home", StringComparison.OrdinalIgnoreCase) == true && actionName != null)
65+
{
66+
// Use the action name directly as the route
67+
routes.Add(actionName.ToLowerInvariant());
68+
}
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}
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}
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return routes;
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}
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}

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