Add feature flag support and update related configurations

- Implemented feature flag management in HomeController and Index view.
- Updated Program.cs to include feature management services and configuration.
- Enhanced setup scripts to create and enable a 'Beta' feature flag.

Author: codebytes

21-azure-app-configuration/Controllers/HomeController.cs

@@ -1,20 +1,24 @@
 using System.Diagnostics;
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.FeatureManagement;
 using SampleAppConfigAsp.Models;
 
 namespace SampleAppConfigAsp.Controllers;
 
 public class HomeController : Controller
 {
     private readonly ILogger<HomeController> _logger;
+    private readonly IFeatureManager _featureManager;
 
-    public HomeController(ILogger<HomeController> logger)
+    public HomeController(ILogger<HomeController> logger, IFeatureManager featureManager)
     {
         _logger = logger;
+        _featureManager = featureManager;
     }
 
-    public IActionResult Index()
+    public async Task<IActionResult> Index()
     {
+        ViewData["BetaFeatureEnabled"] = await _featureManager.IsEnabledAsync("Beta");
         return View();
     }
 

21-azure-app-configuration/Program.cs

@@ -1,6 +1,7 @@
 using Azure.Identity;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Configuration.AzureAppConfiguration;
+using Microsoft.FeatureManagement;
 
 var builder = WebApplication.CreateBuilder(args);
 var appConfigEndpoint = builder.Configuration["AzureAppConfiguration:Endpoint"];
@@ -13,6 +14,10 @@
 builder.Configuration.AddAzureAppConfiguration(options =>
 {
     options.Connect(new Uri(appConfigEndpoint), new DefaultAzureCredential())
+        .UseFeatureFlags(featureFlagOptions =>
+        {
+            featureFlagOptions.SetRefreshInterval(TimeSpan.FromSeconds(5));
+        })
         .ConfigureRefresh(refresh =>
                 {
                     refresh.Register("TestApp:Settings:Sentinel", refreshAll: true)
@@ -23,6 +28,7 @@
 // Add services to the container.
 builder.Services.AddControllersWithViews();
 builder.Services.AddAzureAppConfiguration();
+builder.Services.AddFeatureManagement();
 builder.Services.Configure<Settings>(builder.Configuration.GetSection("TestApp:Settings"));
 
 var app = builder.Build();

21-azure-app-configuration/Views/Home/Index.cshtml

@@ -9,6 +9,29 @@
         color: @Configuration["TestApp:Settings:FontColor"];
         font-size: @Configuration["TestApp:Settings:FontSize"]px;
     }
+    .feature-flag {
+        margin-top: 20px;
+        padding: 10px;
+        border-radius: 5px;
+        display: inline-block;
+    }
+    .feature-enabled {
+        background-color: #d4edda;
+        color: #155724;
+        border: 1px solid #c3e6cb;
+    }
+    .feature-disabled {
+        background-color: #f8d7da;
+        color: #721c24;
+        border: 1px solid #f5c6cb;
+    }
 </style>
 
-<h1>@Configuration["TestApp:Settings:Message"]</h1>
+<h1>@Configuration["TestApp:Settings:Message"]</h1>
+
+@if (ViewData["BetaFeatureEnabled"] is true)
+{
+    <div class="feature-flag feature-enabled">
+        <strong>Beta Feature:</strong> Enabled ✓
+    </div>
+}

21-azure-app-configuration/setup.ps1

@@ -37,6 +37,11 @@ foreach ($entry in $settings.GetEnumerator())
     az appconfig kv set --name $AppConfigName --key $entry.Key --value $entry.Value -y --only-show-errors --output none | Out-Null
 }
 
+# Create feature flag
+az appconfig feature set --name $AppConfigName --feature Beta --description "Beta feature flag for testing" -y --only-show-errors --output none | Out-Null
+az appconfig feature enable --name $AppConfigName --feature Beta -y --only-show-errors --output none | Out-Null
+Write-Host "Created and enabled 'Beta' feature flag"
+
 $endpoint = "https://$AppConfigName.azconfig.io"
 dotnet user-secrets init --project $projectPath | Out-Null
 dotnet user-secrets set --project $projectPath 'AzureAppConfiguration:Endpoint' $endpoint | Out-Null

21-azure-app-configuration/setup.sh

@@ -22,6 +22,11 @@ az appconfig kv set --name "${acName}" --key TestApp:Settings:FontSize --value 4
 az appconfig kv set --name "${acName}" --key TestApp:Settings:Message --value "Data from Azure App Configuration" -y --only-show-errors -o none
 az appconfig kv set --name "${acName}" --key TestApp:Settings:Sentinel --value 1 -y --only-show-errors -o none
 
+# Create feature flag
+az appconfig feature set --name "${acName}" --feature Beta --description "Beta feature flag for testing" -y --only-show-errors -o none
+az appconfig feature enable --name "${acName}" --feature Beta -y --only-show-errors -o none
+echo "Created and enabled 'Beta' feature flag"
+
 endpoint="https://${acName}.azconfig.io"
 dotnet user-secrets init --project "${project_path}" >/dev/null
 dotnet user-secrets set --project "${project_path}" "AzureAppConfiguration:Endpoint" "${endpoint}" >/dev/null