fCraft.WorldCommands.WorldMainHandler C# (CSharp) Method

        static void WorldMainHandler( Player player, Command cmd ) {
            string param = cmd.Next();
            if( param == null ) {
                player.Message( "Main world is {0}", WorldManager.MainWorld.ClassyName );
                var mainedRanks = RankManager.Ranks
                                             .Where( r => r.MainWorld != null && r.MainWorld != WorldManager.MainWorld );
                if( mainedRanks.Count() > 0 ) {
                    player.Message( "Rank mains: {0}",
                                    mainedRanks.JoinToString( r => String.Format( "{0}&S for {1}&S",
                                        // ReSharper disable PossibleNullReferenceException
                                                                                  r.MainWorld.ClassyName,
                                        // ReSharper restore PossibleNullReferenceException
                                                                                  r.ClassyName ) ) );
                }
                return;
            }

            if( param.StartsWith( "@" ) ) {
                string rankName = param.Substring( 1 );
                Rank rank = RankManager.FindRank( rankName );
                if( rank == null ) {
                    player.MessageNoRank( rankName );
                    return;
                }
                string worldName = cmd.Next();
                if( worldName == null ) {
                    if( rank.MainWorld != null ) {
                        player.Message( "Main world for rank {0}&S is {1}",
                                        rank.ClassyName,
                                        rank.MainWorld.ClassyName );
                    } else {
                        player.Message( "Main world for rank {0}&S is {1}&S (default)",
                                        rank.ClassyName,
                                        WorldManager.MainWorld.ClassyName );
                    }
                } else {
                    World world = WorldManager.FindWorldOrPrintMatches( player, worldName );
                    if( world != null ) {
                        SetRankMainWorld( player, rank, world );
                    }
                }

            } else {
                World world = WorldManager.FindWorldOrPrintMatches( player, param );
                if( world != null ) {
                    SetMainWorld( player, world );
                }
            }
        }