From 2a3e4bb8f9f153ebf64805cbd420f855f850c78b Mon Sep 17 00:00:00 2001
From: d10sfan <4337981+d10sfan@users.noreply.github.com>
Date: Wed, 27 Dec 2023 10:45:23 -0600
Subject: [PATCH] Server Console Interaction Improvements (#89)

* Improve CPU usage by delay inside ReadCommand

* Remove backspaced characters from console display
---
 src/Rasa.Utils/Commands/CommandProcessor.cs | 10 +++++++---
 src/Rasa.Utils/Hosting/RasaHost.cs          |  2 +-
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/Rasa.Utils/Commands/CommandProcessor.cs b/src/Rasa.Utils/Commands/CommandProcessor.cs
index 7bf2cab0..9c26d030 100644
--- a/src/Rasa.Utils/Commands/CommandProcessor.cs
+++ b/src/Rasa.Utils/Commands/CommandProcessor.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Threading;
+using System.Threading.Tasks;
 
 namespace Rasa.Commands
 {
@@ -8,9 +9,9 @@ public static class CommandProcessor
     {
         private static readonly Dictionary<string, Action<string[]>> Commands = new Dictionary<string, Action<string[]>>();
 
-        public static void ProcessCommand(CancellationToken stopToken)
+        public static async Task ProcessCommand(CancellationToken stopToken)
         {
-            var command = ReadCommand(stopToken);
+            var command = await ReadCommand(stopToken);
             if (string.IsNullOrWhiteSpace(command))
                 return;
 
@@ -27,7 +28,7 @@ public static void ProcessCommand(CancellationToken stopToken)
             Logger.WriteLog(LogType.Command, $"Invalid command: {command}");
         }
 
-        private static string ReadCommand(CancellationToken stopToken)
+        private static async Task<string> ReadCommand(CancellationToken stopToken)
         {
             var command = string.Empty;
             while (!stopToken.IsCancellationRequested)
@@ -41,12 +42,15 @@ private static string ReadCommand(CancellationToken stopToken)
                             return command;
                         case ConsoleKey.Backspace:
                             command = command.Substring(0, command.Length - 1);
+                            Console.Write("\b \b");
                             break;
                         default:
                             command += key.KeyChar;
                             break;
                     }
                 }
+
+                await Task.Delay(25, stopToken);
             }
             return null;
         }
diff --git a/src/Rasa.Utils/Hosting/RasaHost.cs b/src/Rasa.Utils/Hosting/RasaHost.cs
index a42098a3..e5c20545 100644
--- a/src/Rasa.Utils/Hosting/RasaHost.cs
+++ b/src/Rasa.Utils/Hosting/RasaHost.cs
@@ -50,7 +50,7 @@ private async Task ProcessCommands(CancellationToken stoppingToken)
 
             while (_rasaServer.Running && !stoppingToken.IsCancellationRequested)
             {
-                CommandProcessor.ProcessCommand(stoppingToken);
+                await CommandProcessor.ProcessCommand(stoppingToken);
                 await Task.Delay(25, stoppingToken);
             }
         }