Fix diagnostics for generated commands

Author: Sergio0694

CommunityToolkit.Mvvm.SourceGenerators/ComponentModel/ObservablePropertyGenerator.Execute.cs

@@ -203,11 +203,32 @@ propertySymbol is INamedTypeSymbol typeSymbol &&
                     }
                     else
                     {
-                        diagnostics.Add(
+                        bool isTargetValid = false;
+
+                        // Check for generated commands too
+                        foreach (ISymbol member in fieldSymbol.ContainingType.GetMembers())
+                        {
+                            if (member is IMethodSymbol methodSymbol &&
+                                methodSymbol.HasAttributeWithFullyQualifiedName("global::CommunityToolkit.Mvvm.Input.ICommandAttribute") &&
+                                commandName == ICommandGenerator.Execute.GetGeneratedFieldAndPropertyNames(methodSymbol).PropertyName)
+                            {
+                                notifiedCommandNames.Add(commandName);
+
+                                isTargetValid = true;
+
+                                break;
+                            }
+                        }
+
+                        // Add the diagnostic if the target is definitely invalid
+                        if (!isTargetValid)
+                        {
+                            diagnostics.Add(
                             AlsoNotifyCanExecuteForInvalidTargetError,
                             fieldSymbol,
                             commandName ?? "",
                             fieldSymbol.ContainingType);
+                        }
                     }
                 }
 

CommunityToolkit.Mvvm.SourceGenerators/Input/ICommandGenerator.Execute.cs

@@ -23,7 +23,7 @@ partial class ICommandGenerator
     /// <summary>
     /// A container for all the logic for <see cref="ICommandGenerator"/>.
     /// </summary>
-    private static class Execute
+    internal static class Execute
     {
         /// <summary>
         /// Processes a given target method.
@@ -305,7 +305,7 @@ public static ImmutableArray<MemberDeclarationSyntax> GetSyntax(CommandInfo comm
         /// </summary>
         /// <param name="methodSymbol">The input <see cref="IMethodSymbol"/> instance to process.</param>
         /// <returns>The generated field and property names for <paramref name="methodSymbol"/>.</returns>
-        private static (string FieldName, string PropertyName) GetGeneratedFieldAndPropertyNames(IMethodSymbol methodSymbol)
+        public static (string FieldName, string PropertyName) GetGeneratedFieldAndPropertyNames(IMethodSymbol methodSymbol)
         {
             string propertyName = methodSymbol.Name;