source: binary-improvements/7dtd-server-fixes/src/API.cs@ 488

using System.Collections.Generic;
using AllocsFixes.PersistentData;
using JetBrains.Annotations;
using Platform.Steam;

namespace AllocsFixes {
        [UsedImplicitly]
        public class API : IModApi {
                public void InitMod (Mod _modInstance) {
                        ModEvents.GameStartDone.RegisterHandler (GameAwake);
                        ModEvents.SavePlayerData.RegisterHandler (SavePlayerData);
                        ModEvents.PlayerSpawning.RegisterHandler (PlayerSpawning);
                        ModEvents.PlayerDisconnected.RegisterHandler (PlayerDisconnected);
                        ModEvents.PlayerSpawnedInWorld.RegisterHandler (PlayerSpawned);
                        ModEvents.ChatMessage.RegisterHandler (ChatMessage);
                }

                private static void GameAwake () {
                        PersistentContainer.Load ();
                }

                private static void SavePlayerData (ClientInfo _cInfo, PlayerDataFile _playerDataFile) {
                        PersistentContainer.Instance.Players.GetOrCreate (_cInfo.InternalId, _cInfo.PlatformId, _cInfo.CrossplatformId).Update (_cInfo, _playerDataFile);
                }

                private static void PlayerSpawning (ClientInfo _cInfo, int _chunkViewDim, PlayerProfile _playerProfile) {
                        string owner = null;
                        if (_cInfo.PlatformId is UserIdentifierSteam identifierSteam) {
                                owner = identifierSteam.OwnerId.ToString ();
                        }

                        Log.Out (
                                $"Player connected, entityid={_cInfo.entityId}, name={_cInfo.playerName}, pltfmid={_cInfo.PlatformId?.CombinedString ?? "<unknown>"}, crossid={_cInfo.CrossplatformId?.CombinedString ?? "<unknown/none>"}, steamOwner={owner ?? "<unknown/none>"}, ip={_cInfo.ip}"
                        );
                }

                private static void PlayerDisconnected (ClientInfo _cInfo, bool _bShutdown) {
                        Player p = PersistentContainer.Instance.Players.GetByInternalId (_cInfo.InternalId);
                        if (p != null) {
                                p.SetOffline ();
                        } else {
                                Log.Out ("Disconnected player not found in client list...");
                        }

                        PersistentContainer.Instance.Save ();
                }

                private static void PlayerSpawned (ClientInfo _cInfo, RespawnType _respawnReason, Vector3i _spawnPos) {
                        if (_cInfo == null) {
                                return;
                        }
                        
                        PersistentContainer.Instance.Players.GetOrCreate (_cInfo.InternalId, _cInfo.PlatformId, _cInfo.CrossplatformId).SetOnline (_cInfo);
                        PersistentContainer.Instance.Save ();
                }

                private const string ANSWER = "     [ff0000]I[-] [ff7f00]W[-][ffff00]A[-][80ff00]S[-] [00ffff]H[-][0080ff]E[-][0000ff]R[-][8b00ff]E[-]";

                private static bool ChatMessage (ClientInfo _cInfo, EChatType _type, int _senderId, string _msg, string _mainName,
                        List<int> _recipientEntityIds) {
                        if (string.IsNullOrEmpty (_msg) || !_msg.EqualsCaseInsensitive ("/alloc")) {
                                return true;
                        }

                        if (_cInfo != null) {
                                Log.Out ($"Sent chat hook reply to {_cInfo.InternalId}");
                                _cInfo.SendPackage (NetPackageManager.GetPackage<NetPackageChat> ().Setup (EChatType.Whisper, -1, ANSWER, "",  null));
                        } else {
                                Log.Error ($"ChatHookExample: Argument _cInfo null on message: {_msg}");
                        }

                        return false;
                }
        }
}