TelegramMessageCounter/ArgumentReader.cs

namespace TelegramMessageCounter;

public static class ArgumentReader
{
    public static DataRequest ReadArguments(string[] args)
    {
        string? login = null;
        string? username = null;
        if (args.Length > 0 && args.Any(x => x == "--help"))
        {
            Console.WriteLine("Usage: TelegramMessageCounter --login (phone number) --user (username) <path>" +
                              "\n login - Phone number of telegram. If argument is empty, waiting for Keyboard interrupt" +
                              "\nuser - Username of telegram for individual stats. If argument is empty, analyzing all user history" +
                              "\n path - Path to save results file. If argument is empty, path will be \"results.txt\"\n");
            Environment.Exit(0);
        }

        if (args.Any(x => x == "--user"))
        {
            var userNameArgIndex = args.ToList().IndexOf("--user");
            username = args[userNameArgIndex + 1];
        }

        if (args.Any(x => x == "--login" || x == "-L"))
        {
            var userNameArgIndex = args.ToList().IndexOf("--login");
            if (userNameArgIndex == -1)
            {
                userNameArgIndex = args.ToList().IndexOf("-L");
            }

            login = args[userNameArgIndex + 1];
        }

        string?[] argValues = [login, username];
        string? path = args.Length > 1 && argValues.All(x => x != args.Last()) ? args.Last() : null;

        if (path == null)
            return new(login, username);
        
        return new(login, username, path);
    }
}