source: binary-improvements/7dtd-server-fixes/src/PersistentData/Player.cs@ 300

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];
                                } else {
                                        return null;
                                }
                        }
                }

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

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

                public Vector3i LastPosition {
                        get {
                                if (IsOnline)
                                        return new Vector3i (Entity.GetPosition ());
                                else
                                        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 - ((float)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 void SetOffline ()
                {
                        if (clientInfo != null) {
                                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) {
                        experience = 0;
                        expToNextLevel = _pdf.experience;
                        level = _pdf.level;
                        inventory.Update (_pdf);
                }

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


        }
}