fCraft.PlayerInfo.BanIP C# (CSharp) Method

        public void BanIP( [NotNull] Player player, [CanBeNull] string reason, bool announce, bool raiseEvents )
        {
            if ( player == null )
                throw new ArgumentNullException( "player" );
            if ( reason != null && reason.Trim().Length == 0 )
                reason = null;
            lock ( actionLock ) {
                if ( !player.Can( Permission.Ban, Permission.BanIP ) ) {
                    PlayerOpException.ThrowPermissionMissing( player, this, "IP-ban", Permission.Ban, Permission.BanIP );
                }

                IPAddress address = LastIP;

                // Check if player is trying to ban self
                if ( player.Info == this || address.Equals( player.IP ) && !player.IsSuper ) {
                    PlayerOpException.ThrowCannotTargetSelf( player, this, "IP-ban" );
                }

                // Check if a non-bannable address was given (0.0.0.0 or 255.255.255.255)
                if ( address.Equals( IPAddress.None ) || address.Equals( IPAddress.Any ) ) {
                    PlayerOpException.ThrowInvalidIP( player, this, address );
                }

                // Check if any high-ranked players use this address
                PlayerInfo unbannable = PlayerDB.FindPlayers( address )
                                                .FirstOrDefault( info => !player.Can( Permission.Ban, info.Rank ) );
                if ( unbannable != null ) {
                    PlayerOpException.ThrowPermissionLimitIP( player, unbannable, address );
                }

                // Check existing ban statuses
                bool needNameBan = !IsBanned;
                bool needIPBan = !IPBanList.Contains( address );
                if ( !needIPBan && !needNameBan ) {
                    string msg, colorMsg;
                    if ( player.Can( Permission.ViewPlayerIPs ) ) {
                        msg = String.Format( "Given player ({0}) and their IP address ({1}) are both already banned.",
                                             Name, address );
                        colorMsg = String.Format( "&SGiven player ({0}&S) and their IP address ({1}) are both already banned.",
                                                  ClassyName, address );
                    } else {
                        msg = String.Format( "Given player ({0}) and their IP address are both already banned.",
                                             Name );
                        colorMsg = String.Format( "&SGiven player ({0}&S) and their IP address are both already banned.",
                                                  ClassyName );
                    }
                    throw new PlayerOpException( player, this, PlayerOpExceptionCode.NoActionNeeded, msg, colorMsg );
                }

                // Check if target is IPBan-exempt
                bool targetIsExempt = ( BanStatus == BanStatus.IPBanExempt );
                if ( !needIPBan && targetIsExempt ) {
                    string msg = String.Format( "Given player ({0}) is exempt from IP bans. Remove the exemption and retry.",
                                                Name );
                    string colorMsg = String.Format( "&SGiven player ({0}&S) is exempt from IP bans. Remove the exemption and retry.",
                                                     ClassyName );
                    throw new PlayerOpException( player, this, PlayerOpExceptionCode.TargetIsExempt, msg, colorMsg );
                }

                // Ban the name
                if ( needNameBan ) {
                    Ban( player, reason, announce, raiseEvents );
                }

                PlayerOpException.CheckBanReason( reason, player, this, false );

                // Ban the IP
                if ( needIPBan ) {
                    IPBanInfo banInfo = new IPBanInfo( address, Name, player.Name, reason );
                    if ( IPBanList.Add( banInfo, raiseEvents ) ) {
                        Logger.Log( LogType.UserActivity,
                                    "{0} banned {1} (BanIP {2}). Reason: {3}",
                                    player.Name, address, Name, reason ?? "" );

                        // Announce ban on the server
                        if ( announce ) {
                            var can = Server.Players.Can( Permission.ViewPlayerIPs );
                            can.Message( "&WPlayer {0}&W was IP-banned ({1}) by {2}",
                                         ClassyName, address, player.ClassyName );
                            var cant = Server.Players.Cant( Permission.ViewPlayerIPs );
                            cant.Message( "&WPlayer {0}&W was IP-banned by {1}",
                                          ClassyName, player.ClassyName );
                            if ( ConfigKey.AnnounceKickAndBanReasons.Enabled() && reason != null ) {
                                Server.Message( "&WBanIP reason: {0}", reason );
                            }
                        }
                    } else {
                        // IP is already banned
                        string msg, colorMsg;
                        if ( player.Can( Permission.ViewPlayerIPs ) ) {
                            msg = String.Format( "IP of player {0} ({1}) is already banned.",
                                                 Name, address );
                            colorMsg = String.Format( "&SIP of player {0}&S ({1}) is already banned.",
                                                      Name, address );
                        } else {
                            msg = String.Format( "IP of player {0} is already banned.",
                                                 Name );
                            colorMsg = String.Format( "&SIP of player {0}&S is already banned.",
                                                      ClassyName );
                        }
                        throw new PlayerOpException( player, null, PlayerOpExceptionCode.NoActionNeeded, msg, colorMsg );
                    }
                }
            }
        }