using System;
using System.Collections.Generic;
using System.Text;

namespace Paulb
{

    /// <summary>
    /// Helper class to encode string values for use in BizTalk.
    /// </summary>
    public static class PropertyEncoder
    {


        /// <summary>
        /// Encodes the filename with the SharePoint filename rules, all illegal charaters are 
        /// removed.
        /// The following characters are not valid in a SharePoint documentlibrary:
        ///     &quot;/ \ : * ? &lt; &gt; | " # { } % & ~ \t ,&quot;
        /// </summary>
        /// <param name="fileName">The filename to encode.</param>
        /// <returns>The encoded filename.</returns>
        public static string EncodeFileName(string fileName)
        {
            if( string.IsNullOrEmpty(fileName)){ return fileName; }

            int index = 0;
            while( (index = fileName.IndexOfAny(new char[]{'/', '\\',':', '*', '?' ,'<', '>', '|', '"', '#', '{', '}', '%', '&', '~', '\t', ','})) > 0 ){
                fileName = fileName.Remove(index, 1);
            }

            return System.Web.HttpUtility.HtmlEncode(fileName);
        }

             /// <summary>
             /// Encodes the supplied value for use in XML and the BizTalk XLANG language.
             /// </summary>
             /// <param name="value">The value to encode.</param>
             /// <returns>The encoded string.</returns>
        public static string Encode(string value)
        {
            if (string.IsNullOrEmpty(value))
            {
                return value;
            }

            string result = System.Web.HttpUtility.HtmlEncode(value);

            return BizTalkEncode(result);

        }

        // Encodes BizTalk specific characters.
        private static string BizTalkEncode(string value)
        {
            string tmp1 = value.Replace(@"\", @"\\");

            string tmp2 = tmp1.Replace(@"%", @"\%");

            return tmp2;
        }
    }
}