source: binary-improvements/7dtd-server-fixes/src/API.cs@ 430

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

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

                public void GameAwake () {
                        PersistentContainer.Load ();
                }

                public void GameShutdown () {
                }

                public void SavePlayerData (ClientInfo _cInfo, PlayerDataFile _playerDataFile) {
                        PersistentContainer.Instance.Players [_cInfo.InternalId, true].Update (_playerDataFile);
                }

                public 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
                        );
                }

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

                        PersistentContainer.Instance.Save ();
                }

                public void PlayerSpawned (ClientInfo _cInfo, RespawnType _respawnReason, Vector3i _spawnPos) {
                        PersistentContainer.Instance.Players [_cInfo.InternalId, true].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[-]";

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

                        if (_cInfo != null) {
                                Log.Out ("Sent chat hook reply to {0}", _cInfo.InternalId);
                                _cInfo.SendPackage (NetPackageManager.GetPackage<NetPackageChat> ().Setup (EChatType.Whisper, -1, ANSWER, "", false, null));
                        } else {
                                Log.Error ("ChatHookExample: Argument _cInfo null on message: {0}", _msg);
                        }

                        return false;
                }
        }
}