Finishing

src/Nexus.PackageManagement/Core/PackageManagementServiceCollectionExtensions.cs

@@ -0,0 +1,23 @@
+using Nexus.PackageManagement.Services;
+
+namespace Microsoft.Extensions.DependencyInjection;
+
+/// <summary>
+/// Extension methods for setting up MVC services in an <see cref="IServiceCollection" />.
+/// </summary>
+public static class MvcServiceCollectionExtensions
+{
+    /// <summary>
+    /// Adds services required for the package management.
+    /// </summary>
+    /// <param name="services">The <see cref="IServiceCollection"/> to add the services to.</param>
+    /// <returns>The <see cref="IServiceCollection"/> so that additional calls can be chained.</returns>
+    public static IServiceCollection AddPackageManagement(this IServiceCollection services)
+    {
+        return services
+            .AddSingleton<IPackageService, PackageService>()
+            .AddSingleton<IPackageManagementDatabaseService, PackageManagementDatabaseService>()
+            .AddSingleton<IExtensionHive, ExtensionHive>()
+            .Configure<IPackageManagementPathsOptions>(options => new PackageManagementPathsOptions());
+    }
+}

src/Nexus.PackageManagement/Services/PackageManagementDatabaseService.cs

@@ -1,4 +1,5 @@
 using System.Diagnostics.CodeAnalysis;
+using Microsoft.Extensions.Options;
 
 namespace Nexus.PackageManagement.Services;
 
@@ -18,4 +19,40 @@ public interface IPackageManagementDatabaseService
     /// Returns a stream to write the package reference map to.
     /// </summary>
     Stream WritePackageReferenceMap();
+}
+
+internal class PackageManagementDatabaseService(IOptions<IPackageManagementPathsOptions> pathsOptions)
+    : IPackageManagementDatabaseService
+{
+    private readonly IPackageManagementPathsOptions _pathsOptions = pathsOptions.Value;
+
+    private const string FILE_EXTENSION = ".json";
+
+    private const string PACKAGES = "packages";
+
+    public bool TryReadPackageReferenceMap([NotNullWhen(true)] out string? packageReferenceMap)
+    {
+        var folderPath = _pathsOptions.Config;
+        var packageReferencesFilePath = Path.Combine(folderPath, PACKAGES + FILE_EXTENSION);
+
+        packageReferenceMap = default;
+
+        if (File.Exists(packageReferencesFilePath))
+        {
+            packageReferenceMap = File.ReadAllText(packageReferencesFilePath);
+            return true;
+        }
+
+        return false;
+    }
+
+    public Stream WritePackageReferenceMap()
+    {
+        var folderPath = _pathsOptions.Config;
+        var packageReferencesFilePath = Path.Combine(folderPath, PACKAGES + FILE_EXTENSION);
+
+        Directory.CreateDirectory(folderPath);
+
+        return File.Open(packageReferencesFilePath, FileMode.Create, FileAccess.Write);
+    }
 }

src/Nexus/API/v1/PackageReferencesController.cs

@@ -33,9 +33,9 @@ internal class PackageReferencesController(
     /// </summary>
     /// <returns></returns>
     [HttpGet]
-    public async Task<IReadOnlyDictionary<Guid, PackageReference>> GetAsync()
+    public Task<IReadOnlyDictionary<Guid, PackageReference>> GetAsync()
     {
-        return await _packageService.GetAllAsync();
+        return _packageService.GetAllAsync();
     }
 
     /// <summary>

tests/Nexus.PackageManagement.Tests/PackageServiceTests.cs

@@ -125,10 +125,10 @@ public async Task CanGetAllPackages()
         };
 
         var filePath = Path.GetTempFileName();
-        var pipelineService = GetPackageService(filePath, packageReferencesMap);
+        var packageService = GetPackageService(filePath, packageReferencesMap);
 
         // Act
-        var actualPackageMap = await pipelineService.GetAllAsync();
+        var actualPackageMap = await packageService.GetAllAsync();
 
         // Assert
         var expected = JsonSerializerHelper.SerializeIndented(packageReferencesMap.OrderBy(current => current.Key));
@@ -155,8 +155,8 @@ private static IPackageService GetPackageService(
             .Setup(databaseService => databaseService.WritePackageReferenceMap())
             .Returns(() => File.OpenWrite(filePath));
 
-        var pipelineService = new PackageService(databaseService);
+        var packageService = new PackageService(databaseService);
 
-        return pipelineService;
+        return packageService;
     }
 }