source: binary-improvements/7dtd-server-fixes/src/PersistentData/Player.cs@ 361

using System;
using System.Runtime.Serialization;
using UnityEngine;

namespace AllocsFixes.PersistentData {
        [Serializable]
        public class Player {
                private readonly string steamId;
                private int entityId;
                private string name;
                private string ip;
                private long totalPlayTime;

                [OptionalField] private DateTime lastOnline;

                private Inventory inventory;

                [OptionalField] private int lastPositionX, lastPositionY, lastPositionZ;

                [OptionalField] [Obsolete ("experience no longer available, use level and expToNextLevel instead")]
                private uint experience;

                [OptionalField] private bool chatMuted;
                [OptionalField] private int maxChatLength;
                [OptionalField] private string chatColor;
                [OptionalField] private bool chatName;
                [OptionalField] private uint expToNextLevel;
                [OptionalField] private int level;

                [NonSerialized] private ClientInfo clientInfo;

                public string SteamID {
                        get { return steamId; }
                }

        public int EntityID {
            get { return entityId; }
        }

                public string Name {
                        get { return name == null ? string.Empty : name; }
                }

                public string IP {
                        get { return ip == null ? string.Empty : ip; }
                }

                public Inventory Inventory {
                        get {
                                if (inventory == null) {
                                        inventory = new Inventory ();
                                }

                                return inventory;
                        }
                }

                public bool IsOnline {
                        get { return clientInfo != null; }
                }

                public ClientInfo ClientInfo {
                        get { return clientInfo; }
                }

                public EntityPlayer Entity {
                        get {
                                if (IsOnline) {
                                        return GameManager.Instance.World.Players.dict [clientInfo.entityId];
                                }

                                return null;
                        }
                }

                public long TotalPlayTime {
                        get {
                                if (IsOnline) {
                                        return totalPlayTime + (long) (DateTime.Now - lastOnline).TotalSeconds;
                                }

                                return totalPlayTime;
                        }
                }

                public DateTime LastOnline {
                        get {
                                if (IsOnline) {
                                        return DateTime.Now;
                                }

                                return lastOnline;
                        }
                }

                public Vector3i LastPosition {
                        get {
                                if (IsOnline) {
                                        return new Vector3i (Entity.GetPosition ());
                                }

                                return new Vector3i (lastPositionX, lastPositionY, lastPositionZ);
                        }
                }

                public bool LandProtectionActive {
                        get {
                                return GameManager.Instance.World.IsLandProtectionValidForPlayer (GameManager.Instance
                                        .GetPersistentPlayerList ().GetPlayerData (SteamID));
                        }
                }

                public float LandProtectionMultiplier {
                        get {
                                return GameManager.Instance.World.GetLandProtectionHardnessModifierForPlayer (GameManager.Instance
                                        .GetPersistentPlayerList ().GetPlayerData (SteamID));
                        }
                }


                [Obsolete ("Experience no longer available, use Level instead")]
                public uint Experience {
                        get { return 0; }
                }

                public float Level {
                        get {
                                float expForNextLevel =
                                        (int) Math.Min (Progression.BaseExpToLevel * Mathf.Pow (Progression.ExpMultiplier, level + 1),
                                                int.MaxValue);
                                float fLevel = level + 1f - expToNextLevel / expForNextLevel;
                                return fLevel;
                        }
                }

                public bool IsChatMuted {
                        get { return chatMuted; }
                        set { chatMuted = value; }
                }

                public int MaxChatLength {
                        get {
                                if (maxChatLength == 0) {
                                        maxChatLength = 255;
                                }

                                return maxChatLength;
                        }
                        set { maxChatLength = value; }
                }

                public string ChatColor {
                        get {
                                if (chatColor == null || chatColor == "") {
                                        chatColor = "";
                                }

                                return chatColor;
                        }

                        set { chatColor = value; }
                }

                public bool ChatName {
                        get { return chatName; }

                        set { chatName = value; }
                }

                public Player (string _steamId) {
                        steamId = _steamId;
                        inventory = new Inventory ();
                }

                public void SetOffline () {
                        if (clientInfo == null) {
                                return;
                        }

                        Log.Out ("Player set to offline: " + steamId);
                        lastOnline = DateTime.Now;
                        try {
                                Vector3i lastPos = new Vector3i (Entity.GetPosition ());
                                lastPositionX = lastPos.x;
                                lastPositionY = lastPos.y;
                                lastPositionZ = lastPos.z;
                                totalPlayTime += (long) (Time.timeSinceLevelLoad - Entity.CreationTimeSinceLevelLoad);
                        } catch (NullReferenceException) {
                                Log.Out ("Entity not available. Something seems to be wrong here...");
                        }

                        clientInfo = null;
                }

                public void SetOnline (ClientInfo _ci) {
                        Log.Out ("Player set to online: " + steamId);
                        clientInfo = _ci;
            entityId = _ci.entityId;
                        name = _ci.playerName;
                        ip = _ci.ip;
                        lastOnline = DateTime.Now;
                }

                public void Update (PlayerDataFile _pdf) {
                        UpdateProgression (_pdf);
                        inventory.Update (_pdf);
                }

                private void UpdateProgression (PlayerDataFile _pdf) {
                        if (_pdf.progressionData.Length <= 0) {
                                return;
                        }

                        using (PooledBinaryReader pbr = MemoryPools.poolBinaryReader.AllocSync (false)) {
                                pbr.SetBaseStream (_pdf.progressionData);
                                long posBefore = pbr.BaseStream.Position;
                                pbr.BaseStream.Position = 0;
                                Progression p = Progression.Read (pbr, null);
                                pbr.BaseStream.Position = posBefore;
                                expToNextLevel = (uint) p.ExpToNextLevel;
                                level = p.Level;
                        }
                }
        }
}