fCraft.FlatfilePlayerDBProvider.Load C# (CSharp) Method

        public IEnumerable<PlayerInfo> Load() {
            //LoadBinary();
            //return;
            using( PlayerDB.GetWriteLock() ) {
                if( File.Exists( Paths.PlayerDBFileName ) ) {
                    using( FileStream fs = OpenRead( Paths.PlayerDBFileName ) ) {
                        using( StreamReader reader = new StreamReader( fs, Encoding.UTF8, true, BufferSize ) ) {

                            string header = reader.ReadLine();

                            if( header == null ) {
                                // if PlayerDB is an empty file
                                Logger.Log( LogType.Warning, "PlayerDB.Load: PlayerDB file is empty." );
                                return null;
                            }

                            int version = IdentifyFormatVersion( header );
                            if( version > FormatVersion ) {
                                Logger.Log( LogType.Warning,
                                            "PlayerDB.Load: Attempting to load unsupported PlayerDB format ({0}). Errors may occur.",
                                            version );
                            } else if( version < FormatVersion ) {
                                Logger.Log( LogType.Warning,
                                            "PlayerDB.Load: Converting PlayerDB to a newer format (version {0} to {1}).",
                                            version, FormatVersion );
                            }

                            int emptyRecords = 0;
                            while( true ) {
                                string line = reader.ReadLine();
                                if( line == null ) break;
                                string[] fields = line.Split( ',' );
                                if( fields.Length >= MinFieldCount ) {
#if !DEBUG
                                        try {
#endif
                                    PlayerInfo info;
                                    switch( version ) {
                                        case 0:
                                            info = LoadFormat0( fields );
                                            break;
                                        case 1:
                                            info = LoadFormat1( fields );
                                            break;
                                        default:
                                            // Versions 2-5 differ in semantics only, not in actual serialization format.
                                            info = LoadFormat2( fields );
                                            break;
                                    }

                                    if( info.ID > maxID ) {
                                        maxID = info.ID;
                                        Logger.Log( LogType.Warning,
                                                    "PlayerDB.Load: Adjusting wrongly saved MaxID ({0} to {1})." );
                                    }

                                    // A record is considered "empty" if the player has never logged in.
                                    // Empty records may be created by /Import, /Ban, and /Rank commands on typos.
                                    // Deleting such records should have no negative impact on DB completeness.
                                    if( ( info.LastIP.Equals( IPAddress.None ) || info.LastIP.Equals( IPAddress.Any ) ||
                                          info.TimesVisited == 0 ) &&
                                        !info.IsBanned && info.Rank == RankManager.DefaultRank ) {

                                        Logger.Log( LogType.SystemActivity,
                                                    "PlayerDB.Load: Skipping an empty record for player \"{0}\"",
                                                    info.Name );
                                        emptyRecords++;
                                        continue;
                                    }

                                    // Check for duplicates. Unless PlayerDB.txt was altered externally, this does not happen.
                                    if( trie.ContainsKey( info.Name ) ) {
                                        Logger.Log( LogType.Error,
                                                    "PlayerDB.Load: Duplicate record for player \"{0}\" skipped.",
                                                    info.Name );
                                    } else {
                                        trie.Add( info.Name, info );
                                    }
#if !DEBUG
                                        } catch( Exception ex ) {
                                            Logger.LogAndReportCrash( "Error while parsing PlayerInfo record: " + line,
                                                                      "fCraft",
                                                                      ex,
                                                                      false );
                                        }
#endif
                                } else {
                                    Logger.Log( LogType.Error,
                                                "PlayerDB.Load: Unexpected field count ({0}), expecting at least {1} fields for a PlayerDB entry.",
                                                fields.Length, MinFieldCount );
                                }
                            }

                            if( emptyRecords > 0 ) {
                                Logger.Log( LogType.Warning,
                                            "PlayerDB.Load: Skipped {0} empty records.", emptyRecords );
                            }
                        }
                    }
                } else {
                    Logger.Log( LogType.Warning, "PlayerDB.Load: No player DB file found." );
                }
            }
            return trie.Values;
        }