Allow users to have multiple configuration files

Eve-O-Preview/Configuration/ConfigurationStorage.cs

@@ -7,21 +7,23 @@ namespace EveOPreview.Configuration
 	{
 		private const string ConfigurationFileName = "EVE-O Preview.json";
 
-		private readonly IAppConfig _configuration;
+		private readonly IThumbnailConfig _configuration;
 
-		public ConfigurationStorage(IAppConfig configuration)
+		public ConfigurationStorage(IThumbnailConfig configuration)
 		{
 			this._configuration = configuration;
 		}
 
 		public void Load()
 		{
-			if (!File.Exists(ConfigurationStorage.ConfigurationFileName))
+			string filename = this.GetConfigFileName();
+
+			if (!File.Exists(filename))
 			{
 				return;
 			}
 
-			string rawData = File.ReadAllText(ConfigurationStorage.ConfigurationFileName);
+			string rawData = File.ReadAllText(filename);
 
 			JsonConvert.PopulateObject(rawData, this._configuration);
 
@@ -33,7 +35,12 @@ namespace EveOPreview.Configuration
 		{
 			string rawData = JsonConvert.SerializeObject(this._configuration, Formatting.Indented);
 
-			File.WriteAllText(ConfigurationStorage.ConfigurationFileName, rawData);
+			File.WriteAllText(this.GetConfigFileName(), rawData);
+		}
+
+		private string GetConfigFileName()
+		{
+			return string.IsNullOrEmpty(this._configuration.ConfigFileName) ? ConfigurationStorage.ConfigurationFileName : this._configuration.ConfigFileName;
 		}
 	}
 }

Eve-O-Preview/Configuration/IThumbnailConfig.cs

@@ -3,8 +3,10 @@ using System.Windows.Forms;
 
 namespace EveOPreview.Configuration
 {
-	public interface IAppConfig
+	public interface IThumbnailConfig
 	{
+		string ConfigFileName { get; set; }
+
 		bool MinimizeToTray { get; set; }
 		int ThumbnailRefreshPeriod { get; set; }
 

Eve-O-Preview/Configuration/ThumbnailConfig.cs

@@ -5,11 +5,13 @@ using Newtonsoft.Json;
 
 namespace EveOPreview.Configuration
 {
-	public class AppConfig : IAppConfig
+	public class ThumbnailConfig : IThumbnailConfig
 	{
-		public AppConfig()
+		public ThumbnailConfig()
 		{
 			// Default values
+			this.ConfigFileName = null;
+
 			this.MinimizeToTray = false;
 			this.ThumbnailRefreshPeriod = 500;
 
@@ -41,6 +43,9 @@ namespace EveOPreview.Configuration
 			this.ClientHotkey = new Dictionary<string, string>();
 		}
 
+		[JsonIgnore]
+		public string ConfigFileName { get; set; }
+
 		public bool MinimizeToTray { get; set; }
 		public int ThumbnailRefreshPeriod { get; set; }
 
@@ -163,11 +168,11 @@ namespace EveOPreview.Configuration
 		/// </summary>
 		public void ApplyRestrictions()
 		{
-			this.ThumbnailRefreshPeriod = AppConfig.ApplyRestrictions(this.ThumbnailRefreshPeriod, 300, 1000);
+			this.ThumbnailRefreshPeriod = ThumbnailConfig.ApplyRestrictions(this.ThumbnailRefreshPeriod, 300, 1000);
-			this.ThumbnailSize = new Size(AppConfig.ApplyRestrictions(this.ThumbnailSize.Width, this.ThumbnailMinimumSize.Width, this.ThumbnailMaximumSize.Width),
+			this.ThumbnailSize = new Size(ThumbnailConfig.ApplyRestrictions(this.ThumbnailSize.Width, this.ThumbnailMinimumSize.Width, this.ThumbnailMaximumSize.Width),
-				AppConfig.ApplyRestrictions(this.ThumbnailSize.Height, this.ThumbnailMinimumSize.Height, this.ThumbnailMaximumSize.Height));
+				ThumbnailConfig.ApplyRestrictions(this.ThumbnailSize.Height, this.ThumbnailMinimumSize.Height, this.ThumbnailMaximumSize.Height));
-			this.ThumbnailOpacity = AppConfig.ApplyRestrictions((int)(this.ThumbnailOpacity * 100.00), 20, 100) / 100.00;
+			this.ThumbnailOpacity = ThumbnailConfig.ApplyRestrictions((int)(this.ThumbnailOpacity * 100.00), 20, 100) / 100.00;
-			this.ThumbnailZoomFactor = AppConfig.ApplyRestrictions(this.ThumbnailZoomFactor, 2, 10);
+			this.ThumbnailZoomFactor = ThumbnailConfig.ApplyRestrictions(this.ThumbnailZoomFactor, 2, 10);
 		}
 
 		private static int ApplyRestrictions(int value, int minimum, int maximum)

Eve-O-Preview/Eve-O-Preview.csproj

@@ -97,7 +97,7 @@
     <Compile Include="ApplicationBase\Presenter.cs" />
     <Compile Include="ApplicationBase\PresenterGeneric.cs" />
     <Compile Include="Configuration\ConfigurationStorage.cs" />
-    <Compile Include="Configuration\IAppConfig.cs" />
+    <Compile Include="Configuration\IThumbnailConfig.cs" />
     <Compile Include="Configuration\ZoomAnchor.cs" />
     <Compile Include="DwmAPI\DWM_BLURBEHIND.cs" />
     <Compile Include="DwmAPI\DWM_THUMBNAIL_PROPERTIES.cs" />
@@ -118,7 +118,7 @@
     <Compile Include="UI\Interface\IThumbnailDescriptionView.cs" />
     <Compile Include="UI\Interface\IThumbnailDescriptionViewFactory.cs" />
     <Compile Include="UI\Interface\ViewZoomAnchor.cs" />
-    <Compile Include="Configuration\AppConfig.cs" />
+    <Compile Include="Configuration\ThumbnailConfig.cs" />
     <Compile Include="Hotkeys\HotkeyHandler.cs" />
     <Compile Include="Hotkeys\HotkeyHandlerNativeMethods.cs" />
     <Compile Include="UI\Implementation\MainForm.cs">

Eve-O-Preview/Presentation/MainPresenter.cs

@@ -13,7 +13,7 @@ namespace EveOPreview.UI
 		#endregion
 
 		#region Private fields
-		private readonly IAppConfig _configuration;
+		private readonly IThumbnailConfig _configuration;
 		private readonly IConfigurationStorage _configurationStorage;
 		private readonly IThumbnailDescriptionViewFactory _thumbnailDescriptionViewFactory;
 		private readonly IDictionary<IntPtr, IThumbnailDescriptionView> _thumbnailDescriptionViews;
@@ -22,7 +22,7 @@ namespace EveOPreview.UI
 		private bool _exitApplication;
 		#endregion
 
-		public MainPresenter(IApplicationController controller, IMainView view, IAppConfig configuration, IConfigurationStorage configurationStorage,
+		public MainPresenter(IApplicationController controller, IMainView view, IThumbnailConfig configuration, IConfigurationStorage configurationStorage,
 								IThumbnailManager thumbnailManager, IThumbnailDescriptionViewFactory thumbnailDescriptionViewFactory)
 			: base(controller, view)
 		{

Eve-O-Preview/Presentation/ThumbnailManager.cs

@@ -15,7 +15,7 @@ namespace EveOPreview.UI
 		#endregion
 
 		#region Private fields
-		private readonly IAppConfig _configuration;
+		private readonly IThumbnailConfig _configuration;
 		private readonly DispatcherTimer _thumbnailUpdateTimer;
 		private readonly IThumbnailViewFactory _thumbnailViewFactory;
 		private readonly Dictionary<IntPtr, IThumbnailView> _thumbnailViews;
@@ -27,7 +27,7 @@ namespace EveOPreview.UI
 		private bool _isHoverEffectActive;
 		#endregion
 
-		public ThumbnailManager(IAppConfig configuration, IThumbnailViewFactory factory)
+		public ThumbnailManager(IThumbnailConfig configuration, IThumbnailViewFactory factory)
 		{
 			this._configuration = configuration;
 			this._thumbnailViewFactory = factory;

Eve-O-Preview/Program.cs

@@ -7,9 +7,11 @@ namespace EveOPreview
 {
 	static class Program
 	{
+		private static string ConfigParameterName = "--config:";
+
 		/// <summary>The main entry point for the application.</summary>
 		[STAThread]
-		static void Main()
+		static void Main(string[] args)
 		{
 			Application.EnableVisualStyles();
 			Application.SetCompatibleTextRenderingDefault(false);
@@ -29,9 +31,41 @@ namespace EveOPreview
 				.RegisterService<IThumbnailViewFactory, ThumbnailViewFactory>()
 				.RegisterService<IThumbnailDescriptionViewFactory, ThumbnailDescriptionViewFactory>()
 				.RegisterService<IConfigurationStorage, ConfigurationStorage>()
-				.RegisterInstance<IAppConfig>(new AppConfig());
+				.RegisterInstance<IThumbnailConfig>(new ThumbnailConfig());
+
+			controller.Create<IThumbnailConfig>().ConfigFileName = Program.GetCustomConfigFile(args);
 
 			controller.Run<MainPresenter>();
 		}
+
+		// Parse startup parameters
+		// Simple approach is used because something like NParams would be an overkill here
+		private static string GetCustomConfigFile(string[] args)
+		{
+			string configFile = null;
+			foreach (string arg in args)
+			{
+				if ((arg.Length <= Program.ConfigParameterName.Length) || !arg.StartsWith(Program.ConfigParameterName, StringComparison.Ordinal))
+				{
+					continue;
+				}
+
+				configFile = arg.Substring(Program.ConfigParameterName.Length);
+				break;
+			}
+
+			if (string.IsNullOrEmpty(configFile))
+			{
+				return "";
+			}
+
+			// One more check to drop trailing "
+			if ((configFile.Length > 3) && (configFile[0] == '"') && (configFile[configFile.Length - 1] == '"'))
+			{
+				configFile = configFile.Substring(1, configFile.Length - 2);
+			}
+
+			return configFile;
+		}
 	}
 }