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

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

namespace Webserver.WebAPI.APIs.Permissions {
        [UsedImplicitly]
        public class Blacklist : AbsRestApi {
                private const string propertyName = "name";
                private const string propertyUserId = "userId";
                private const string propertyBannedUntil = "bannedUntil";
                private const string propertyBanReason = "banReason";

                private static readonly byte[] jsonKeyName = JsonWriter.GetEncodedPropertyNameWithBeginObject (propertyName);
                private static readonly byte[] jsonKeyUserId = JsonWriter.GetEncodedPropertyNameWithPrefixValueSeparator (propertyUserId);
                private static readonly byte[] jsonKeyBannedUntil = JsonWriter.GetEncodedPropertyNameWithPrefixValueSeparator (propertyBannedUntil);
                private static readonly byte[] jsonKeyBanReason = JsonWriter.GetEncodedPropertyNameWithPrefixValueSeparator (propertyBanReason);

                private static AdminBlacklist BlacklistInstance => GameManager.Instance.adminTools.Blacklist;

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

                        PrepareEnvelopedResult (out JsonWriter writer);

                        if (string.IsNullOrEmpty (id)) {
                                writer.WriteBeginArray ();

                                bool first = true;
                                foreach (AdminBlacklist.BannedUser ban in BlacklistInstance.GetBanned ()) {
                                        if (!first) {
                                                writer.WriteValueSeparator ();
                                        }

                                        first = false;

                                        writeBan (ref writer, ban);
                                }

                                writer.WriteEndArray ();

                                SendEnvelopedResult (_context, ref writer);
                                return;
                        }

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

                private void writeBan (ref JsonWriter _writer, AdminBlacklist.BannedUser _ban) {
                        _writer.WriteRaw (jsonKeyName);
                        _writer.WriteString (_ban.Name ?? "");
                        _writer.WriteRaw (jsonKeyUserId);
                        JsonCommons.WritePlatformUserIdentifier (ref _writer, _ban.UserIdentifier);
                        _writer.WriteRaw (jsonKeyBannedUntil);
                        JsonCommons.WriteDateTime (ref _writer, _ban.BannedUntil);
                        _writer.WriteRaw (jsonKeyBanReason);
                        _writer.WriteString (_ban.BanReason);
                        _writer.WriteEndObject ();
                }

                protected override void HandleRestPost (RequestContext _context, IDictionary<string, object> _jsonInput, byte[] _jsonInputData) {
                        if (!TryParseId (_context, _jsonInputData, out PlatformUserIdentifierAbs userId)) {
                                return;
                        }

                        if (!JsonCommons.TryReadDateTime (_jsonInput, propertyBannedUntil, out DateTime bannedUntil)) {
                                SendEmptyResponse (_context, HttpStatusCode.BadRequest, _jsonInputData, EApiErrorCode.NO_OR_INVALID_BANNED_UNTIL);
                                return;
                        }

                        JsonCommons.TryGetJsonField (_jsonInput, propertyBanReason, out string banReason);

                        JsonCommons.TryGetJsonField (_jsonInput, propertyName, out string name);

                        BlacklistInstance.AddBan (name, userId, bannedUntil, banReason);

                        SendEmptyResponse (_context, HttpStatusCode.Created);
                }

                protected override void HandleRestDelete (RequestContext _context) {
                        if (!TryParseId (_context, null, out PlatformUserIdentifierAbs userId)) {
                                return;
                        }

                        bool removed = BlacklistInstance.RemoveBan (userId);

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

                private bool TryParseId (RequestContext _context, byte[] _jsonInputData, out PlatformUserIdentifierAbs _userId) {
                        string id = _context.RequestPath;
                        _userId = default;

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

                        if (!PlatformUserIdentifierAbs.TryFromCombinedString (id, out _userId)) {
                                SendEmptyResponse (_context, HttpStatusCode.BadRequest, _jsonInputData, EApiErrorCode.INVALID_USER);
                                return false;
                        }

                        return true;
                }

                protected override bool AllowPostWithId => true;

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