Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Windows.Forms;

namespace Icq2003Pro2Html
{
    /// <summary>
    /// Converts ICQ 2002 and ICQ 2003 a (DAT) as well as ICQ 2003 b History files (fpt) to human-readable RTF
    /// </summary>
    class Program
    {
        /// <example>icq2003pro2html xyz.fpt</example>
        static void Main(string[] args)
        {
            if (args.Length < 1)
            {
                printUsage();
                return;
            }

            string sInputFilePath = args[0];
            string sUserNameFilter = null;
            if (args.Length > 1)
                sUserNameFilter = args[1];

            if (sInputFilePath.EndsWith(".fpt", StringComparison.InvariantCultureIgnoreCase))
                parseFPT(sInputFilePath, sUserNameFilter);
            else if (sInputFilePath.EndsWith(".dat", StringComparison.InvariantCultureIgnoreCase)
                || sInputFilePath.EndsWith(".dat2", StringComparison.InvariantCultureIgnoreCase))
                parseDAT(sInputFilePath, sUserNameFilter);
            else
                Console.WriteLine("File ends neither with .fpt nor with .dat. Is it really an ICQ History file?");


#if DEBUG
            Console.WriteLine("DEBUG: Finished! Press enter to exit!");
            Console.ReadLine();
#endif
        }

        const string SendRTF = @"{\rtf1\ansi\ansicpg1252\deff0\deflang1031{\fonttbl{\f1\fnil\fcharset0 Microsoft Sans Serif;}}" + "\n" +
            @"{\colortbl ;\red0\green0\blue255;}" + "\n" +
            @"\viewkind4\uc1\pard\cf1\f0\fs14\sb60 **NAME** (**DATE**):\par" + "\n" +
            @"}";

        const string ReceiveRTF = @"{\rtf1\ansi\ansicpg1252\deff0\deflang1031{\fonttbl{\f1\fnil\fcharset0 Microsoft Sans Serif;}}" + "\n" +
            @"{\colortbl ;\red255\green0\blue0;}" + "\n" +
            @"\viewkind4\uc1\pard\cf1\f0\fs14\sb60 **NAME** (**DATE**):\par" + "\n" +
            @"}";

        private static void processHistoryStream(IICQHistoryStream history, string sUserNameFilter)
        {
            ICollection<IICQMessage> packets = new LinkedList<IICQMessage>();
            for (IICQMessage packet = history.parseNextPacket(); packet != null; packet = history.parseNextPacket())
            {
                if (string.IsNullOrEmpty(sUserNameFilter) || packet.OtherPartyName.Contains(sUserNameFilter))
                    packets.Add(packet);

                //if (packets.Count > 50)
                //    break;          // speed up for debugging
            }

            StringBuilder sbRTFOutput = new StringBuilder(100000);
            RichTextBox rtfAggregator = new RichTextBox();

            foreach (IICQMessage orderedPacket in packets.OrderBy<IICQMessage, DateTime>(packet => packet.TimeOfMessage))
            {
                rtfAggregator.Select(rtfAggregator.TextLength, 0);
                if (orderedPacket.isOutgoing)
                    rtfAggregator.SelectedRtf = SendRTF
                        .Replace("**NAME**", "*LocalUser*")
                        .Replace("**DATE**", orderedPacket.TimeOfMessage.ToLocalTime().ToString());
                else
                    rtfAggregator.SelectedRtf = ReceiveRTF
                        .Replace("**NAME**", orderedPacket.OtherPartyName)
                        .Replace("**DATE**", orderedPacket.TimeOfMessage.ToLocalTime().ToString());

                if (!string.IsNullOrEmpty(orderedPacket.TextRTF))
                {
                    rtfAggregator.Select(rtfAggregator.TextLength, 0);
                    rtfAggregator.SelectedRtf = orderedPacket.TextRTF;

                    //                  Console.WriteLine(orderedPacket.TextRTF);

                }
                else
                {
                    rtfAggregator.Select(rtfAggregator.TextLength, 0);
                    rtfAggregator.SelectedText = orderedPacket.Text + "\n";
                }

                //Console.WriteLine(orderedPacket.ToString());
            }

            Console.WriteLine(rtfAggregator.Rtf);
        }

        private static void parseDAT(string sInputFilePath, string sUserNameFilter)
        {
            // TODO: Define some interface for History streams and put this method together with parseFPT
            using (FileStream fs = File.Open(sInputFilePath, FileMode.Open))
            {
                DATHistoryStream history = new DATHistoryStream(fs);
                processHistoryStream(history, sUserNameFilter);
            }
        }

        private static void parseFPT(string sInputFilePath, string sUserNameFilter)
        {
            using (FileStream fs = File.Open(sInputFilePath, FileMode.Open))
            {
                FPTHistoryStream history = new FPTHistoryStream(fs);
                processHistoryStream(history, sUserNameFilter);    
            }
        }

        private static void printUsage()
        {
            Console.WriteLine("Written by Froggy. Licensed under WTFPL.");
            Console.WriteLine("Usage: icq2003Pro2Html HistoryFile [UserNameFilter]");
            Console.WriteLine();
            Console.WriteLine("HistoryFile    - Full path to a ICQ Pro 2003a History (DAT) or ICQ Pro 2003b History (FPT)");
            Console.WriteLine("UserNameFilter - A string that must be part of the username string otherwise messages are filtered out");
        }
    }
}