using System;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
namespace MediaBrowser.Common.Extensions
{
///
/// Class BaseExtensions
///
public static class BaseExtensions
{
///
/// Strips the HTML.
///
/// The HTML string.
/// System.String.
public static string StripHtml(this string htmlString)
{
// http://stackoverflow.com/questions/1349023/how-can-i-strip-html-from-text-in-net
const string pattern = @"<(.|\n)*?>";
return Regex.Replace(htmlString, pattern, string.Empty).Trim();
}
///
/// Replaces the specified STR.
///
/// The STR.
/// The old value.
/// The new value.
/// The comparison.
/// System.String.
public static string Replace(this string str, string oldValue, string newValue, StringComparison comparison)
{
var sb = new StringBuilder();
var previousIndex = 0;
var index = str.IndexOf(oldValue, comparison);
while (index != -1)
{
sb.Append(str.Substring(previousIndex, index - previousIndex));
sb.Append(newValue);
index += oldValue.Length;
previousIndex = index;
index = str.IndexOf(oldValue, index, comparison);
}
sb.Append(str.Substring(previousIndex));
return sb.ToString();
}
///
/// Gets the M d5.
///
/// The STR.
/// Guid.
public static Guid GetMD5(this string str)
{
using (var provider = MD5.Create())
{
return new Guid(provider.ComputeHash(Encoding.Unicode.GetBytes(str)));
}
}
///
/// Gets the MB id.
///
/// The STR.
/// The type.
/// Guid.
public static Guid GetMBId(this string str, Type type)
{
if (type == null)
{
throw new ArgumentNullException("type");
}
var key = type.FullName + str.ToLower();
return key.GetMD5();
}
///
/// Gets the attribute value.
///
/// The STR.
/// The attrib.
/// System.String.
/// attrib
public static string GetAttributeValue(this string str, string attrib)
{
if (string.IsNullOrEmpty(str))
{
throw new ArgumentNullException("str");
}
if (string.IsNullOrEmpty(attrib))
{
throw new ArgumentNullException("attrib");
}
string srch = "[" + attrib + "=";
int start = str.IndexOf(srch, StringComparison.OrdinalIgnoreCase);
if (start > -1)
{
start += srch.Length;
int end = str.IndexOf(']', start);
return str.Substring(start, end - start);
}
return null;
}
}
}