NPC refactor (#10122)

Co-authored-by: metalgearsloth <metalgearsloth@gmail.com>

Content.Server/NPC/Commands/NPCDomainCommand.cs

@@ -0,0 +1,52 @@
+using System.Linq;
+using Content.Server.Administration;
+using Content.Server.NPC.HTN;
+using Content.Shared.Administration;
+using Robust.Shared.Console;
+using Robust.Shared.Prototypes;
+
+namespace Content.Server.NPC.Commands;
+
+/// <summary>
+/// Lists out the domain of a particular HTN compound task.
+/// </summary>
+[AdminCommand(AdminFlags.Debug)]
+public sealed class NPCDomainCommand : IConsoleCommand
+{
+    public string Command => "npcdomain";
+    public string Description => "Lists the domain of a particular HTN compound task";
+    public string Help => $"{Command} <htncompoundtask>";
+    public void Execute(IConsoleShell shell, string argStr, string[] args)
+    {
+        if (args.Length != 1)
+        {
+            shell.WriteError("shell-need-exactly-one-argument");
+            return;
+        }
+
+        var protoManager = IoCManager.Resolve<IPrototypeManager>();
+
+        if (!protoManager.TryIndex<HTNCompoundTask>(args[0], out var compound))
+        {
+            shell.WriteError($"Unable to find HTN compound task for '{args[0]}'");
+            return;
+        }
+
+        var htnSystem = IoCManager.Resolve<IEntitySystemManager>().GetEntitySystem<HTNSystem>();
+
+        foreach (var line in htnSystem.GetDomain(compound).Split("\n"))
+        {
+            shell.WriteLine(line);
+        }
+    }
+
+    public CompletionResult GetCompletion(IConsoleShell shell, string[] args)
+    {
+        var protoManager = IoCManager.Resolve<IPrototypeManager>();
+
+        if (args.Length > 1)
+            return CompletionResult.Empty;
+
+        return CompletionResult.FromHintOptions(protoManager.EnumeratePrototypes<HTNCompoundTask>().Select(o => o.ID), "compound task");
+    }
+}