/*
 * Box Social™
 * http://boxsocial.net/
 * Copyright © 2007, David Lachlan Smith
 * 
 * $Id:$
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 as
 * published by the Free Software Foundation.
 *
 * 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;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Globalization;
using System.Text;
using System.Text.RegularExpressions;
using BoxSocial.IO;

namespace BoxSocial.Internals
{
    public static class Navigation
    {

        public static void GenerateSlug(string title, ref string slug)
        {
            if (string.IsNullOrEmpty(slug))
            {
                slug = title;
            }

            NormaliseSlug(ref slug);
        }

        public static void NormaliseSlug(ref string slug)
        {
            // normalise slug if it has been fiddeled with
            slug = slug.ToLower().Normalize(NormalizationForm.FormD);
            string normalisedSlug = string.Empty;

            for (int i = 0; i < slug.Length; i++)
            {
                if (CharUnicodeInfo.GetUnicodeCategory(slug[i]) != UnicodeCategory.NonSpacingMark)
                {
                    normalisedSlug += slug[i];
                }
            }
            slug = Regex.Replace(normalisedSlug, @"([\W]+)", "-");
        }
        
    }   
}