fCraft.FlatfilePlayerDBProvider.GuessRankChangeType C# (CSharp) Method

        static void GuessRankChangeType( [NotNull] PlayerInfo info ) {
            if( info == null ) throw new ArgumentNullException( "info" );
            if( info.PreviousRank != null ) {
                if( info.RankChangeReason == "~AutoRank" || info.RankChangeReason == "~AutoRankAll" || info.RankChangeReason == "~MassRank" ) {
                    if( info.PreviousRank > info.Rank ) {
                        info.RankChangeType = RankChangeType.AutoDemoted;
                    } else if( info.PreviousRank < info.Rank ) {
                        info.RankChangeType = RankChangeType.AutoPromoted;
                    }
                } else {
                    if( info.PreviousRank > info.Rank ) {
                        info.RankChangeType = RankChangeType.Demoted;
                    } else if( info.PreviousRank < info.Rank ) {
                        info.RankChangeType = RankChangeType.Promoted;
                    }
                }
            } else {
                info.RankChangeType = RankChangeType.Default;
            }
        }