Add printLine support for commands and implement basic UI controls rendering

UI/CLI/CommandManager.cs

@@ -24,7 +24,7 @@ public static class CommandManager
         return commands.Values.OrderBy(command => command.Name);
     }
 
-    public static bool TryExecute(string input)
+    public static bool TryExecute(string input, Action<string> printLine)
     {
         string trimmedInput = input.Trim();
 
@@ -51,7 +51,7 @@ public static class CommandManager
                 arguments = trimmedInput.Substring(commandName.Length).TrimStart();
             }
 
-            entry.Value.Execute(arguments);
+            entry.Value.Execute(arguments, printLine);
             return true;
         }
 

UI/CLI/Commands/ClearCommand.cs

@@ -8,7 +8,7 @@ public sealed class ClearCommand : ICommand
 
     public string Description => "Clear the screen";
 
-    public void Execute(string? arguments)
+    public void Execute(string? arguments, Action<string> printLine)
     {
         Console.Clear();
     }

UI/CLI/Commands/HaltCommand.cs

@@ -8,9 +8,9 @@ public sealed class HaltCommand : ICommand
 
     public string Description => "Halt the system";
 
-    public void Execute(string? arguments)
+    public void Execute(string? arguments, Action<string> printLine)
     {
-        Console.WriteLine("Halting system...");
+        printLine("Halting system...");
         Environment.Exit(0);
     }
 }

UI/CLI/Commands/HelpCommand.cs

@@ -8,13 +8,13 @@ public sealed class HelpCommand : ICommand
 
     public string Description => "Show this help message";
 
-    public void Execute(string? arguments)
+    public void Execute(string? arguments, Action<string> printLine)
     {
-        Console.WriteLine("Available commands:");
+        printLine("Available commands:");
 
         foreach (ICommand command in CommandManager.GetCommands())
         {
-            Console.WriteLine($"  {command.Name,-12} - {command.Description}");
+            printLine($"  {command.Name,-12} - {command.Description}");
         }
     }
 }

UI/CLI/Commands/ProcessCommands.cs

@@ -9,10 +9,10 @@ public sealed class SpawnTestProcessCommand : ICommand
 
     public string Description => "Spawn the test process";
 
-    public void Execute(string? arguments)
+    public void Execute(string? arguments, Action<string> printLine)
     {
         int processId = ProcessManager.SpawnProcess<TestProcess>();
-        Console.WriteLine($"Spawned TestProcess with ID {processId}");
+        printLine($"Spawned TestProcess with ID {processId}");
     }
 }
 
@@ -22,15 +22,15 @@ public sealed class ListProcessesCommand : ICommand
 
     public string Description => "List running processes";
 
-    public void Execute(string? arguments)
+    public void Execute(string? arguments, Action<string> printLine)
     {
         IEnumerable<Process> processes = ProcessManager.GetAllProcesses();
 
-        Console.WriteLine("Running processes:");
+        printLine("Running processes:");
 
         foreach (Process process in processes)
         {
-            Console.WriteLine($"  ID: {process.Id}, Name: {process.Name}");
+            printLine($"  ID: {process.Id}, Name: {process.Name}");
         }
     }
 }
@@ -41,23 +41,23 @@ public sealed class StopProcessCommand : ICommand
 
     public string Description => "Stop a process by ID";
 
-    public void Execute(string? arguments)
+    public void Execute(string? arguments, Action<string> printLine)
     {
         string? idText = arguments;
 
         if (string.IsNullOrWhiteSpace(idText))
         {
-            Console.WriteLine("Usage: stop <process-id>");
+            printLine("Usage: stop <process-id>");
             return;
         }
 
         if (int.TryParse(idText, out int processId))
         {
             ProcessManager.StopProcess(processId);
-            Console.WriteLine($"Stopped process with ID {processId}");
+            printLine($"Stopped process with ID {processId}");
             return;
         }
 
-        Console.WriteLine("Invalid process ID");
+        printLine("Invalid process ID");
     }
 }

UI/CLI/ICommand.cs

@@ -1,10 +1,12 @@
 namespace RemSox.UI.GUI.CLI;
 
+using System;
+
 public interface ICommand
 {
     string Name { get; }
 
     string Description { get; }
 
-    void Execute(string? arguments);
+    void Execute(string? arguments, Action<string> printLine);
 }