104 lines
3.3 KiB
C#
104 lines
3.3 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Security.Cryptography;
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using System.Text;
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using System.Text.RegularExpressions;
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namespace MediaBrowser.Common.Extensions
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{
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/// <summary>
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/// Class BaseExtensions
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/// </summary>
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public static class BaseExtensions
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{
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/// <summary>
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/// Strips the HTML.
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/// </summary>
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/// <param name="htmlString">The HTML string.</param>
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/// <returns>System.String.</returns>
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public static string StripHtml(this string htmlString)
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{
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// http://stackoverflow.com/questions/1349023/how-can-i-strip-html-from-text-in-net
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const string pattern = @"<(.|\n)*?>";
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return Regex.Replace(htmlString, pattern, string.Empty).Trim();
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}
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/// <summary>
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/// Gets the M d5.
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/// </summary>
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/// <param name="str">The STR.</param>
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/// <returns>Guid.</returns>
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public static Guid GetMD5(this string str)
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{
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using (var provider = MD5.Create())
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{
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return new Guid(provider.ComputeHash(Encoding.Unicode.GetBytes(str)));
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}
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}
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/// <summary>
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/// Gets the MB id.
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/// </summary>
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/// <param name="str">The STR.</param>
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/// <param name="aType">A type.</param>
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/// <returns>Guid.</returns>
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/// <exception cref="System.ArgumentNullException">aType</exception>
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public static Guid GetMBId(this string str, Type aType)
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{
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if (aType == null)
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{
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throw new ArgumentNullException("aType");
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}
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return (aType.FullName + str.ToLower()).GetMD5();
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}
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/// <summary>
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/// Helper method for Dictionaries since they throw on not-found keys
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <typeparam name="U"></typeparam>
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/// <param name="dictionary">The dictionary.</param>
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/// <param name="key">The key.</param>
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/// <param name="defaultValue">The default value.</param>
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/// <returns>``1.</returns>
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public static U GetValueOrDefault<T, U>(this Dictionary<T, U> dictionary, T key, U defaultValue)
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{
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U val;
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if (!dictionary.TryGetValue(key, out val))
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{
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val = defaultValue;
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}
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return val;
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}
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/// <summary>
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/// Gets the attribute value.
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/// </summary>
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/// <param name="str">The STR.</param>
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/// <param name="attrib">The attrib.</param>
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/// <returns>System.String.</returns>
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/// <exception cref="System.ArgumentNullException">attrib</exception>
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public static string GetAttributeValue(this string str, string attrib)
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{
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if (attrib == null)
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{
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throw new ArgumentNullException("attrib");
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}
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string srch = "[" + attrib + "=";
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int start = str.IndexOf(srch, StringComparison.OrdinalIgnoreCase);
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if (start > -1)
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{
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start += srch.Length;
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int end = str.IndexOf(']', start);
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return str.Substring(start, end - start);
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}
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return null;
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}
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}
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}
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