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using System;
using System.Globalization;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
namespace MediaBrowser.Common.Extensions
{
/// <summary>
/// Class BaseExtensions
/// </summary>
public static class BaseExtensions
{
/// <summary>
/// Strips the HTML.
/// </summary>
/// <param name="htmlString">The HTML string.</param>
/// <returns>System.String.</returns>
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();
}
/// <summary>
/// Replaces the specified STR.
/// </summary>
/// <param name="str">The STR.</param>
/// <param name="oldValue">The old value.</param>
/// <param name="newValue">The new value.</param>
/// <param name="comparison">The comparison.</param>
/// <returns>System.String.</returns>
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();
}
/// <summary>
/// Removes the accent.
/// </summary>
/// <param name="text">The text.</param>
/// <returns>System.String.</returns>
public static string RemoveAccent(this string text)
{
var normalizedString = text.Normalize(NormalizationForm.FormD);
var stringBuilder = new StringBuilder();
foreach (var c in normalizedString)
{
var unicodeCategory = CharUnicodeInfo.GetUnicodeCategory(c);
if (unicodeCategory != UnicodeCategory.NonSpacingMark)
{
stringBuilder.Append(c);
}
}
return stringBuilder.ToString().Normalize(NormalizationForm.FormC);
}
/// <summary>
/// Gets the M d5.
/// </summary>
/// <param name="str">The STR.</param>
/// <returns>Guid.</returns>
public static Guid GetMD5(this string str)
{
using (var provider = MD5.Create())
{
return new Guid(provider.ComputeHash(Encoding.Unicode.GetBytes(str)));
}
}
/// <summary>
/// Gets the MB id.
/// </summary>
/// <param name="str">The STR.</param>
/// <param name="type">The type.</param>
/// <returns>Guid.</returns>
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();
}
/// <summary>
/// Gets the attribute value.
/// </summary>
/// <param name="str">The STR.</param>
/// <param name="attrib">The attrib.</param>
/// <returns>System.String.</returns>
/// <exception cref="System.ArgumentNullException">attrib</exception>
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;
}
}
}
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