NbuExplorer Code

/*******************************************************************************

    NbuExplorer - Nokia backup file parser, viewer and extractor
    Copyright (C) 2010 Petr Vilem

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

    Project homepage: http://sourceforge.net/projects/nbuexplorer/
    Author: Petr Vilem, petrusek@seznam.cz

*******************************************************************************/
using System.Collections.Generic;

namespace NbuExplorer
{
    internal class AppArgs
    {
        public List<string> inputFiles { get; } = new List<string>();
        public string outputMessageFile { get; set; }
        public int outputMessageFormat { get; set; }

        public static AppArgs Parse(string[] args)
        {
            var result = new AppArgs();
            int state = 0;
            foreach (var s in args)
            {
                if (s.StartsWith("--"))
                {
                    switch (s.Substring(2).ToLowerInvariant())
                    {
                        case "exportmsg":
                            state = 1;
                            break;
                        case "msgformat":
                            state = 2;
                            break;
                        default:
                            state = 0; // append input file
                            break;
                    }
                }
                else
                {
                    switch (state)
                    {
                        case 1:
                            result.outputMessageFile = s;
                            break;
                        case 2:
                            if (int.TryParse(s, out var format))
                            {
                                result.outputMessageFormat = format;
                            }
                            break;
                        default:
                            result.inputFiles.Add(s);
                            break;
                    }
                }
            }
            return result;
        }
    }
}