use fluen modsink builder

src/ModSink.Common/ModSink.cs

@@ -7,15 +7,11 @@ namespace ModSink.Common
 {
     public class ModSink : IModSink
     {
-        public ModSink(IHashFunction hashFunction, IClientService client, IServerManager server)
+        public ModSink( IClientService client)
         {
-            this.HashFunction = hashFunction;
             this.Client = client;
-            this.Server = server;
         }
 
         public IClientService Client { get; }
-        public IHashFunction HashFunction { get; }
-        public IServerManager Server { get; }
     }
 }

src/ModSink.Common/ModSinkBuilder.cs

@@ -0,0 +1,39 @@
+using System.IO;
+using System.Runtime.Serialization;
+using ModSink.Common.Client;
+using ModSink.Core;
+using ModSink.Core.Client;
+
+namespace ModSink.Common
+{
+    public class ModSinkBuilder
+    {
+        private IDownloader downloader;
+        private IFormatter formatter;
+        private DirectoryInfo localStorageDirectory;
+
+        public ModSinkBuilder WithDownloader(IDownloader downloader)
+        {
+            this.downloader = downloader;
+            return this;
+        }
+
+        public ModSinkBuilder WithFormatter(IFormatter formatter)
+        {
+            this.formatter = formatter;
+            return this;
+        }
+
+        public ModSinkBuilder InDirectory(DirectoryInfo directory)
+        {
+            localStorageDirectory = directory;
+            return this;
+        }
+
+        public IModSink Build()
+        {
+            return new ModSink(new ClientService(new DownloadService(downloader),
+                new LocalStorageService(localStorageDirectory), downloader, formatter));
+        }
+    }
+}

src/ModSink.Core/IModSink.cs

@@ -9,7 +9,5 @@ namespace ModSink.Core
     public interface IModSink
     {
         IClientService Client { get; }
-        IHashFunction HashFunction { get; }
-        IServerManager Server { get; }
     }
 }

src/ModSink.WPF/ViewModel/MainWindowViewModel.cs

@@ -11,9 +11,12 @@ public class MainWindowViewModel : ReactiveObject
     {
         public MainWindowViewModel()
         {
-            var cs = new ClientService(new DownloadService(new HttpClientDownloader()),
-                new LocalStorageService(PathProvider.Downloads),
-                new HttpClientDownloader(), new BinaryFormatter());
+            var modsink = new ModSinkBuilder()
+                .WithDownloader(new HttpClientDownloader())
+                .WithFormatter(new BinaryFormatter())
+                .InDirectory(PathProvider.Downloads)
+                .Build();
+            var cs = modsink.Client;
             DownloadsVM = new DownloadsViewModel(cs);
             LibraryVM = new LibraryViewModel(cs);
             SettingsVM = new SettingsViewModel(new SettingsModel(cs));