RemoteView/Configuration.cs

using System;
using System.Collections;
using System.Globalization;

namespace RemoteView {
    class Configuration {
        /// <summary>
        /// Allow multiple instances of process
        /// </summary>
        public bool AllowMultiple { get; private set; }

        /// <summary>
        /// Display banner
        /// </summary>
        public bool Banner { get; private set; }

        /// <summary>
        /// Display help
        /// </summary>
        public bool Help { get; private set; }

        /// <summary>
        /// Port where to listen
        /// </summary>
        public int Port { get; private set; }

        /// <summary>
        /// Gets the ip address.
        /// </summary>
        /// <value>The ip address.</value>
        public string IpAddress { get; private set; }

        /// <summary>
        /// Private c'tor with default values for object instances
        /// Use factory method instead of instatiating c'tor
        /// </summary>
        private Configuration () {
            this.AllowMultiple = false;
            this.Banner = true;
            this.Help = false;
            this.Port = 6060;
            this.IpAddress = "*";
        }

        public static Configuration create (string[] parameters) {
            Configuration conf = new Configuration ();

            // use default configuration if no parameters exist

            if (parameters.Length == 0)
                return conf;

            // cycle throught command line using enumerator on parameters array

            IEnumerator enumerator = parameters.GetEnumerator ();
            enumerator.MoveNext ();

            string parameter = (string)enumerator.Current;

            // parse if first parameter is a valid integer and use it as a port number for listener

            int port;
            bool hasPortParameter = int.TryParse (parameter, out port);

            if (hasPortParameter) {
                conf.Port = port;

                // continue parsing parameters (if they exist)
                if (!enumerator.MoveNext ())
                    return conf;
                parameter = (string)enumerator.Current;
            }

            do {
                if (parameter.Equals ("-m")) {
                    conf.AllowMultiple = true;
                } else if (parameter.Equals ("-b")) {
                    conf.Banner = false;
                } else if (parameter.Equals ("-h")) {
                    conf.Help = true;
                } else if (parameter.Equals ("--ip")) {
                    enumerator.MoveNext ();
                    conf.IpAddress = (string)enumerator.Current;
                } else {
                    throw new ArgumentException (string.Format ("Error: {0} is an invalid command line parameter.", parameter));
                }

                parameter = (string)enumerator.Current;
            } while (enumerator.MoveNext ());

            return conf;
        }
    }
}