source: binary-improvements/MapRendering/API/GetAllowedCommands.cs

using JetBrains.Annotations;
using Utf8Json;
using Webserver;
using Webserver.WebAPI;

namespace AllocsFixes.WebAPIs {
        [UsedImplicitly]
        public class GetAllowedCommands : AbsWebAPI {
                private static readonly byte[] jsonKeyCommands = JsonWriter.GetEncodedPropertyNameWithBeginObject ("commands");

                private static readonly byte[] jsonKeyCommand = JsonWriter.GetEncodedPropertyNameWithBeginObject ("command");
                private static readonly byte[] jsonKeyDescription = JsonWriter.GetEncodedPropertyNameWithPrefixValueSeparator ("description");
                private static readonly byte[] jsonKeyHelp = JsonWriter.GetEncodedPropertyNameWithPrefixValueSeparator ("help");

                public override void HandleRequest (RequestContext _context) {
                        JsonWriter writer = new JsonWriter ();
                        
                        writer.WriteRaw (jsonKeyCommands);
                        writer.WriteBeginArray ();

                        bool first = true;

                        foreach (IConsoleCommand cc in SdtdConsole.Instance.GetCommands ()) {
                                int commandPermissionLevel = GameManager.Instance.adminTools.Commands.GetCommandPermissionLevel (cc.GetCommands ());
                                if (_context.PermissionLevel > commandPermissionLevel) {
                                        continue;
                                }

                                string cmd = string.Empty;
                                foreach (string s in cc.GetCommands ()) {
                                        if (s.Length > cmd.Length) {
                                                cmd = s;
                                        }
                                }

                                if (!first) {
                                        writer.WriteValueSeparator ();
                                }

                                first = false;
                                
                                writer.WriteRaw (jsonKeyCommand);
                                writer.WriteString (cmd);
                                
                                writer.WriteRaw (jsonKeyDescription);
                                writer.WriteString (cc.GetDescription ());
                                
                                writer.WriteRaw (jsonKeyHelp);
                                if (cc.GetHelp () == null) {
                                        writer.WriteString ("");
                                } else {
                                        writer.WriteString (cc.GetHelp ());
                                }

                                writer.WriteEndObject ();
                        }

                        writer.WriteEndArray ();
                        writer.WriteEndObject ();
                        
                        WebUtils.WriteJsonData (_context.Response, ref writer);
                }

                public override int DefaultPermissionLevel () {
                        return 2000;
                }
        }
}