source: TFP-WebServer/WebServer/src/WebAPI/APIs/Permissions/WebApiTokens.cs@ 497

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

namespace Webserver.WebAPI.APIs.Permissions {
        [UsedImplicitly]
        public class WebApiTokens : AbsRestApi {
                private const string propertyName = "name";
                private const string propertySecret = "secret";
                private const string propertyPermissionLevel = "permissionLevel";

                private static readonly byte[] jsonKeyName = JsonWriter.GetEncodedPropertyNameWithBeginObject (propertyName);
                private static readonly byte[] jsonKeySecret = JsonWriter.GetEncodedPropertyNameWithPrefixValueSeparator (propertySecret);
                private static readonly byte[] jsonKeyPermissionLevel = JsonWriter.GetEncodedPropertyNameWithPrefixValueSeparator (propertyPermissionLevel);

                private static AdminApiTokens ApiTokensInstance => AdminApiTokens.Instance;

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

                        PrepareEnvelopedResult (out JsonWriter writer);
                        
                        if (string.IsNullOrEmpty (id)) {
                                
                                writer.WriteBeginArray ();
                        
                                bool first = true;
                                foreach ((_, AdminApiTokens.ApiToken token) in ApiTokensInstance.GetTokens ()) {
                                        if (!first) {
                                                writer.WriteValueSeparator ();
                                        }

                                        first = false;

                                        writeTokenJson (ref writer, token);
                                }

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

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

                private void writeTokenJson (ref JsonWriter _writer, AdminApiTokens.ApiToken _token) {
                        _writer.WriteRaw (jsonKeyName);
                        _writer.WriteString (_token.Name);
                        _writer.WriteRaw (jsonKeySecret);
                        _writer.WriteString (_token.Secret);
                        _writer.WriteRaw (jsonKeyPermissionLevel);
                        _writer.WriteInt32 (_token.PermissionLevel);
                        _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_NAME);
                                return;
                        }

                        if (!JsonCommons.TryGetJsonField (_jsonInput, propertySecret, out string secret)) {
                                SendEmptyResponse (_context, HttpStatusCode.BadRequest, _jsonInputData, EApiErrorCode.NO_OR_INVALID_SECRET);
                                return;
                        }

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

                        ApiTokensInstance.AddToken (id, secret, permissionLevel);

                        SendEmptyResponse (_context, HttpStatusCode.Created);
                }

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

                        bool removed = ApiTokensInstance.RemoveToken (id);

                        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
                };
        }
}