source: binary-improvements/MapRendering/API/GetLandClaims.cs@ 457

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

namespace AllocsFixes.WebAPIs {
        [UsedImplicitly]
        public class GetLandClaims : AbsWebAPI {
                private static readonly byte[] jsonKeyClaimSize = JsonWriter.GetEncodedPropertyNameWithBeginObject ("claimsize");
                private static readonly byte[] jsonKeyClaimOwners = JsonWriter.GetEncodedPropertyNameWithPrefixValueSeparator ("claimowners");

                private static readonly byte[] jsonKeySteamId = JsonWriter.GetEncodedPropertyNameWithBeginObject ("steamid");
                private static readonly byte[] jsonKeyCrossPlatformId = JsonWriter.GetEncodedPropertyNameWithPrefixValueSeparator ("crossplatformid");
                private static readonly byte[] jsonKeyClaimActive = JsonWriter.GetEncodedPropertyNameWithPrefixValueSeparator ("claimactive");
                private static readonly byte[] jsonKeyPlayerName = JsonWriter.GetEncodedPropertyNameWithPrefixValueSeparator ("playername");
                private static readonly byte[] jsonKeyClaims = JsonWriter.GetEncodedPropertyNameWithPrefixValueSeparator ("claims");

                public override void HandleRequest (RequestContext _context) {
                        PlatformUserIdentifierAbs requestedUserId = null;
                        if (_context.Request.QueryString ["userid"] != null) {
                                if (!PlatformUserIdentifierAbs.TryFromCombinedString (_context.Request.QueryString ["userid"], out requestedUserId)) {
                                        WebUtils.WriteText (_context.Response, "Invalid user id given", HttpStatusCode.BadRequest);
                                        return;
                                }
                        }

                        // default user, cheap way to avoid 'null reference exception'
                        PlatformUserIdentifierAbs userId = _context.Connection?.UserId;

                        bool bViewAll = PermissionUtils.CanViewAllClaims (_context.PermissionLevel);

                        LandClaimList.OwnerFilter[] ownerFilters = null;
                        if (requestedUserId != null || !bViewAll) {
                                if (requestedUserId != null && !bViewAll) {
                                        ownerFilters = new[] {
                                                LandClaimList.UserIdFilter (userId),
                                                LandClaimList.UserIdFilter (requestedUserId),
                                        };
                                } else if (!bViewAll) {
                                        ownerFilters = new[] {LandClaimList.UserIdFilter (userId)};
                                } else {
                                        ownerFilters = new[] {LandClaimList.UserIdFilter (requestedUserId)};
                                }
                        }

                        LandClaimList.PositionFilter[] posFilters = null;

                        Dictionary<Player, List<Vector3i>> claims = LandClaimList.GetLandClaims (ownerFilters, posFilters);

                        JsonWriter writer = new JsonWriter ();
                        
                        writer.WriteRaw (jsonKeyClaimSize);
                        writer.WriteInt32 (GamePrefs.GetInt (EnumUtils.Parse<EnumGamePrefs> (nameof(EnumGamePrefs.LandClaimSize))));
                        
                        writer.WriteRaw (jsonKeyClaimOwners);
                        writer.WriteBeginArray ();
                        
                        bool first = true;

                        foreach (KeyValuePair<Player, List<Vector3i>> kvp in claims) {
                                if (!first) {
                                        writer.WriteValueSeparator ();
                                }

                                first = false;
                                
                                writer.WriteRaw (jsonKeySteamId);
                                writer.WriteString (kvp.Key.PlatformId?.CombinedString ?? "");
                                
                                writer.WriteRaw (jsonKeyCrossPlatformId);
                                writer.WriteString (kvp.Key.CrossPlatformId?.CombinedString ?? "");
                                
                                writer.WriteRaw (jsonKeyClaimActive);
                                writer.WriteBoolean (kvp.Key.LandProtectionActive);
                                
                                writer.WriteRaw (jsonKeyPlayerName);
                                if (kvp.Key.Name.Length > 0) {
                                        writer.WriteString (kvp.Key.Name);
                                } else {
                                        writer.WriteNull ();
                                }
                                
                                writer.WriteRaw (jsonKeyClaims);
                                writer.WriteBeginArray ();

                                bool first2 = true;

                                foreach (Vector3i v in kvp.Value) {
                                        if (!first2) {
                                                writer.WriteValueSeparator ();
                                        }

                                        first2 = false;
                                        
                                        JsonCommons.WriteVector3I (ref writer, v);
                                }
                                
                                writer.WriteEndArray ();
                                
                                writer.WriteEndObject ();
                        }

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