Restructure solution layout by module

src/Scanner/__Libraries/StellaOps.Scanner.Queue/ScannerQueueServiceCollectionExtensions.cs

@@ -0,0 +1,67 @@
+using System;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
+using Microsoft.Extensions.Diagnostics.HealthChecks;
+using Microsoft.Extensions.Logging;
+using StellaOps.Scanner.Queue.Nats;
+using StellaOps.Scanner.Queue.Redis;
+
+namespace StellaOps.Scanner.Queue;
+
+public static class ScannerQueueServiceCollectionExtensions
+{
+    public static IServiceCollection AddScannerQueue(
+        this IServiceCollection services,
+        IConfiguration configuration,
+        string sectionName = "scanner:queue")
+    {
+        ArgumentNullException.ThrowIfNull(services);
+        ArgumentNullException.ThrowIfNull(configuration);
+
+        var options = new ScannerQueueOptions();
+        configuration.GetSection(sectionName).Bind(options);
+
+        services.TryAddSingleton(TimeProvider.System);
+        services.AddSingleton(options);
+
+        services.AddSingleton<IScanQueue>(sp =>
+        {
+            var loggerFactory = sp.GetRequiredService<ILoggerFactory>();
+            var timeProvider = sp.GetService<TimeProvider>() ?? TimeProvider.System;
+
+            return options.Kind switch
+            {
+                QueueTransportKind.Redis => new RedisScanQueue(
+                    options,
+                    options.Redis,
+                    loggerFactory.CreateLogger<RedisScanQueue>(),
+                    timeProvider),
+                QueueTransportKind.Nats => new NatsScanQueue(
+                    options,
+                    options.Nats,
+                    loggerFactory.CreateLogger<NatsScanQueue>(),
+                    timeProvider),
+                _ => throw new InvalidOperationException($"Unsupported queue transport kind '{options.Kind}'.")
+            };
+        });
+
+        services.AddSingleton<ScannerQueueHealthCheck>();
+
+        return services;
+    }
+
+    public static IHealthChecksBuilder AddScannerQueueHealthCheck(
+        this IHealthChecksBuilder builder)
+    {
+        ArgumentNullException.ThrowIfNull(builder);
+
+        builder.Services.TryAddSingleton<ScannerQueueHealthCheck>();
+        builder.AddCheck<ScannerQueueHealthCheck>(
+            name: "scanner-queue",
+            failureStatus: HealthStatus.Unhealthy,
+            tags: new[] { "scanner", "queue" });
+
+        return builder;
+    }
+}