Command system and input system

BLHX.Server.Game/Commands/HelpCommand.cs

@@ -0,0 +1,32 @@
+using System.Reflection;
+using System.Text;
+
+namespace BLHX.Server.Game.Commands;
+
+[commandHandler("help", "Print out all commands with their description and example", "help")]
+public class HelpCommand : Command
+{
+    static readonly Dictionary<Type, commandHandler?> commandAttributes = new Dictionary<Type, commandHandler?>();
+
+    public override void Execute(Dictionary<string, string> args)
+    {
+        base.Execute(args);
+
+        StringBuilder sb = new StringBuilder();
+
+        sb.AppendLine("Available Commands: ");
+        foreach (var command in CommandHandler.Commands)
+        {
+            if (!commandAttributes.TryGetValue(command.GetType(), out var attr))
+            {
+                attr = command.GetType().GetCustomAttribute(typeof(commandHandler)) as commandHandler;
+                commandAttributes[command.GetType()] = attr;
+            }
+
+            if (attr != null)
+                sb.AppendLine($"  {attr.Name} - {attr.Description} (Example: {attr.Example})");
+        }
+
+        Console.Write(sb.ToString());
+    }
+}