source: TFP-WebServer/WebServer/src/WebAPI/APIs/Permissions/CommandPermissions.cs

using System.Collections.Generic;
using System.Net;
using JetBrains.Annotations;
using Utf8Json;
using Webserver.Permissions;

namespace Webserver.WebAPI.APIs.Permissions {
        [UsedImplicitly]
        public class CommandPermissions : AbsRestApi {
                private const string propertyCommand = "command";
                private const string propertyPermissionLevel = "permissionLevel";
                private const string propertyIsDefault = "default";

                private static readonly byte[] jsonKeyCommand = JsonWriter.GetEncodedPropertyNameWithBeginObject (propertyCommand);
                private static readonly byte[] jsonKeyPermissionLevel = JsonWriter.GetEncodedPropertyNameWithPrefixValueSeparator (propertyPermissionLevel);
                private static readonly byte[] jsonKeyIsDefault = JsonWriter.GetEncodedPropertyNameWithPrefixValueSeparator (propertyIsDefault);

                private static AdminCommands CommandsInstance => GameManager.Instance.adminTools.Commands;

                protected override void HandleRestGet (RequestContext _context) {
                        string id = _context.RequestPath;

                        PrepareEnvelopedResult (out JsonWriter writer);
                        
                        if (string.IsNullOrEmpty (id)) {
                                
                                writer.WriteBeginArray ();
                        
                                bool first = true;
                                
                                foreach (IConsoleCommand command in SdtdConsole.Instance.GetCommands ()) {
                                        if (!first) {
                                                writer.WriteValueSeparator ();
                                        }

                                        first = false;

                                        AdminCommands.CommandPermission commandPermission = CommandsInstance.GetAdminToolsCommandPermission (command.GetCommands());
                                        bool isDefault = commandPermission.PermissionLevel == command.DefaultPermissionLevel;
                                        if (commandPermission.Command == "") {
                                                commandPermission =
                                                        new AdminCommands.CommandPermission (command.GetCommands ()[0], commandPermission.PermissionLevel);
                                        }

                                        writeCommandJson (ref writer, commandPermission, isDefault);
                                }
                                
                                writer.WriteEndArray ();
                                
                                SendEnvelopedResult (_context, ref writer);
                                return;
                        }

                        writer.WriteRaw (WebUtils.JsonEmptyData);
                        SendEnvelopedResult (_context, ref writer, HttpStatusCode.BadRequest);
                }

                private void writeCommandJson(ref JsonWriter _writer, AdminCommands.CommandPermission _commandPermission, bool _isDefault) {
                        _writer.WriteRaw (jsonKeyCommand);
                        _writer.WriteString (_commandPermission.Command);
                        _writer.WriteRaw (jsonKeyPermissionLevel);
                        _writer.WriteInt32 (_commandPermission.PermissionLevel);
                        _writer.WriteRaw (jsonKeyIsDefault);
                        _writer.WriteBoolean (_isDefault);
                        _writer.WriteEndObject ();
                }

                protected override void HandleRestPost (RequestContext _context, IDictionary<string, object> _jsonInput, byte[] _jsonInputData) {
                        string id = _context.RequestPath;

                        if (string.IsNullOrEmpty (id)) {
                                SendEmptyResponse (_context, HttpStatusCode.BadRequest, _jsonInputData, EApiErrorCode.NO_COMMAND);
                                return;
                        }

                        IConsoleCommand cmd = SdtdConsole.Instance.GetCommand (id);
                        if (cmd == null) {
                                SendEmptyResponse (_context, HttpStatusCode.NotFound, _jsonInputData, EApiErrorCode.UNKNOWN_COMMAND);
                                return;
                        }

                        if (!JsonCommons.TryGetJsonField (_jsonInput, propertyPermissionLevel, out int permissionLevel)) {
                                SendEmptyResponse (_context, HttpStatusCode.BadRequest, _jsonInputData, EApiErrorCode.NO_OR_INVALID_PERMISSION_LEVEL);
                                return;
                        }

                        CommandsInstance.AddCommand (cmd.GetCommands ()[0], permissionLevel);

                        SendEmptyResponse (_context, HttpStatusCode.Created);
                }

                protected override void HandleRestDelete (RequestContext _context) {
                        string id = _context.RequestPath;

                        IConsoleCommand cmd = SdtdConsole.Instance.GetCommand (id);
                        if (cmd == null || !CommandsInstance.IsPermissionDefined (cmd.GetCommands ())) {
                                SendEmptyResponse (_context, HttpStatusCode.NotFound);
                                return;
                        }

                        bool removed = CommandsInstance.RemoveCommand (cmd.GetCommands ());

                        SendEmptyResponse (_context, removed ? HttpStatusCode.NoContent : HttpStatusCode.NotFound);
                }

                protected override bool AllowPostWithId => true;

                public override int[] DefaultMethodPermissionLevels () => new[] {
                        AdminWebModules.MethodLevelNotSupported,
                        AdminWebModules.MethodLevelInheritGlobal,
                        AdminWebModules.MethodLevelInheritGlobal,
                        AdminWebModules.MethodLevelNotSupported,
                        AdminWebModules.MethodLevelInheritGlobal
                };
        }
}