From dc79350e1b570cba0a199219e85cc5e26b74f077 Mon Sep 17 00:00:00 2001
From: David Vreony <dpvreony@users.noreply.github.com>
Date: Fri, 7 Jun 2024 23:33:23 +0100
Subject: [PATCH] add support for input, output args on commands

---
 src/Vetuviem.Core/CommandBinding.cs | 61 +++++++++++++++++++++++++++--
 1 file changed, 57 insertions(+), 4 deletions(-)

diff --git a/src/Vetuviem.Core/CommandBinding.cs b/src/Vetuviem.Core/CommandBinding.cs
index 5b30a0e..e3c2d9d 100644
--- a/src/Vetuviem.Core/CommandBinding.cs
+++ b/src/Vetuviem.Core/CommandBinding.cs
@@ -15,12 +15,9 @@ namespace Vetuviem.Core
     /// Represents a command binding between a control and a viewmodel.
     /// </summary>
     /// <typeparam name="TViewModel">The type for the viewmodel.</typeparam>
-    public sealed class CommandBinding<TViewModel> : ICommandBinding<TViewModel, ICommand>
+    public class CommandBinding<TViewModel> : CommandBinding<TViewModel, Unit, Unit>
         where TViewModel : class
     {
-        private readonly Expression<Func<TViewModel, ReactiveCommand<Unit, Unit>?>> _viewModelBinding;
-        private readonly string? _toEvent;
-
         /// <summary>
         /// Initializes a new instance of the <see cref="CommandBinding{TViewModel}"/> class.
         /// </summary>
@@ -29,6 +26,62 @@ public sealed class CommandBinding<TViewModel> : ICommandBinding<TViewModel, ICo
         public CommandBinding(
             Expression<Func<TViewModel, ReactiveCommand<Unit, Unit>?>> viewModelBinding,
             string? toEvent = null)
+            : base(
+                viewModelBinding,
+                toEvent)
+        {
+        }
+    }
+
+    /// <summary>
+    /// Represents a command binding between a control and a viewmodel.
+    /// </summary>
+    /// <typeparam name="TViewModel">The type for the viewmodel.</typeparam>
+    /// <typeparam name="TResult">
+    /// The type of the values that are the result of command execution.
+    /// </typeparam>
+    public class CommandBinding<TViewModel, TResult> : CommandBinding<TViewModel, Unit, TResult>
+        where TViewModel : class
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CommandBinding{TViewModel, TResult}"/> class.
+        /// </summary>
+        /// <param name="viewModelBinding">Expression for the View Model binding.</param>
+        /// <param name="toEvent">If specified, bind to the specific event instead of the default.</param>
+        public CommandBinding(
+            Expression<Func<TViewModel, ReactiveCommand<Unit, TResult>?>> viewModelBinding,
+            string? toEvent = null)
+            : base(
+                viewModelBinding,
+                toEvent)
+        {
+        }
+    }
+
+    /// <summary>
+    /// Represents a command binding between a control and a viewmodel.
+    /// </summary>
+    /// <typeparam name="TViewModel">The type for the viewmodel.</typeparam>
+    /// <typeparam name="TParam">
+    /// The type of parameter values passed in during command execution.
+    /// </typeparam>
+    /// <typeparam name="TResult">
+    /// The type of the values that are the result of command execution.
+    /// </typeparam>
+    public class CommandBinding<TViewModel, TParam, TResult> : ICommandBinding<TViewModel, ICommand>
+        where TViewModel : class
+    {
+        private readonly Expression<Func<TViewModel, ReactiveCommand<TParam, TResult>?>> _viewModelBinding;
+        private readonly string? _toEvent;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CommandBinding{TViewModel, TParam, TResult}"/> class.
+        /// </summary>
+        /// <param name="viewModelBinding">Expression for the View Model binding.</param>
+        /// <param name="toEvent">If specified, bind to the specific event instead of the default.</param>
+        public CommandBinding(
+            Expression<Func<TViewModel, ReactiveCommand<TParam, TResult>?>> viewModelBinding,
+            string? toEvent = null)
         {
             _viewModelBinding = viewModelBinding;
             _toEvent = toEvent;