~grubng-dev/grubng/tools-urlsdb

//  
//  Copyright (C) 2010,2011 Bartek thindil Jasicki
// 
//  This file is part of Grubng
// 
//  Grubng 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/>.
// 

using System;

namespace urlsdb
{

	/// <summary>
	/// Class provide various utility functions.
	/// </summary>
	internal sealed class Utils : IDisposable
	{
		/// <summary>
		/// If true, don't show messages.
		/// </summary>
		bool quiet;
		/// <summary>
		/// Amount of data to process.
		/// </summary>
		int amount;
		/// <summary>
		/// Current processed amount of data.
		/// </summary>
		int curamount;
		/// <summary>
		/// Timer to update informations about work progress.
		/// </summary>
		System.Timers.Timer progress;
		/// <summary>
		/// Length of message to display during progress informations.
		/// </summary>
		int length;
		/// <summary>
		/// Message to show with work progress informations.
		/// </summary>
		string message;
		/// <summary>
		/// If true, all disposable fields are disposed.
		/// </summary>
		bool disposed;
		/// <summary>
		/// Message sent last time.
		/// </summary>
		string oldmessage;
		
		/// <summary>
		/// Standard class constructor
		/// </summary>
		/// <param name="q">
		/// A <see cref="System.Boolean"/> if true, don't show messages.
		/// </param>
		public Utils(bool q)
		{
			this.quiet = q;
			if (!q)
			{
				Console.Clear();
			}
		}
		
		/// <summary>
		/// Function show message to user.
		/// </summary>
		/// <param name="message">
		/// A <see cref="System.String"/> message to show to user.
		/// </param>
		/// <param name="newline">
		/// A <see cref="System.Boolean"/> if true, add new line after message.
		/// </param>
		public void Message(string message, bool newline)
		{
			if (this.disposed)
			{
				throw new ObjectDisposedException(GetType().Name);
			}
			if (this.quiet)
			{
				return;
			}
			if (newline)
			{
				Console.WriteLine(message);
			}
			else
			{
				Console.Write(message);
			}
		}
		
		/// <summary>
		/// Function start timer for show work progress informations.
		/// </summary>
		/// <param name="a">
		/// A <see cref="System.Int32"/> amount of data to process.
		/// </param>
		/// <param name="msg">
		/// A <see cref="System.String"/> message to show with progress informations.
		/// </param>
		public void ProgressStart(int a, string msg)
		{
			if (this.disposed)
			{
				throw new ObjectDisposedException(GetType().Name);
			}
			this.amount = a;
			this.curamount = 0;
			this.length = 0;
			this.message = msg;
			this.oldmessage = String.Empty;
			this.progress = new System.Timers.Timer();
			this.progress.Interval = 1000;
			this.progress.Elapsed += new System.Timers.ElapsedEventHandler(OnProgress);
			this.progress.Start();
		}
		
		/// <summary>
		/// Function stop timer for show work progress informations.
		/// </summary>
		public void ProgressStop()
		{
			if (this.disposed)
			{
				throw new ObjectDisposedException(GetType().Name);
			}
			if (this.amount > 0)
			{
				this.curamount = this.amount;
			}
			this.OnProgress(null, null);
			this.progress.Stop();
		}
		
		/// <summary>
		/// Timer for show work progress informations.
		/// </summary>
		/// <param name="sender">
		/// A <see cref="System.Object"/> unused.
		/// </param>
		/// <param name="e">
		/// A <see cref="System.Timers.ElapsedEventArgs"/> unused.
		/// </param>
		void OnProgress(object sender, System.Timers.ElapsedEventArgs e)
		{
			if (this.quiet)
			{
				return;
			}
			double percent = 0;
			string msg;
			int newpos = Console.CursorLeft - this.length;
			if (this.amount > 0)
			{
				percent = Math.Ceiling(((double)this.curamount / (double)this.amount * 100));
				msg = "(" + percent.ToString() + " % done)";
			}
			else
			{
				msg = this.curamount.ToString() + " " + this.message;
			}
			if (msg != this.oldmessage)
			{
				this.oldmessage = msg;
				this.length = msg.Length;
				Console.SetCursorPosition(newpos, Console.CursorTop);
				this.Message(msg, false);
			}
		}
		
		/// <summary>
		/// Function write message to log files.
		/// </summary>
		/// <param name="message">
		/// A <see cref="System.String"/> message to write to log file.
		/// </param>
		public static void WriteLog(string message)
		{
			string 	date = DateTime.UtcNow.ToString("yyyy/MM/dd/HH:mm:ss");
			using (System.IO.StreamWriter logstream = new System.IO.StreamWriter("error.log", true))
			{
				logstream.WriteLine(date + " " + message);
				logstream.Close();
			}
		}
		
		/// <summary>
		/// Function dispose unmanaged resources.
		/// </summary>
		public void Dispose()
		{
			if (this.progress != null)
			{
				this.progress.Dispose();
			}
			this.disposed = true;
		}
		
		/// <summary>
		/// Property set/read private field curamount.
		/// </summary>
		public int Curamount
		{
			set {this.curamount = value;}
			get {return this.curamount;}
		}
	}
}