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118 lines
3.2 KiB
118 lines
3.2 KiB
using System;
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using System.Globalization;
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using System.Text.RegularExpressions;
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using System.Web.Security;
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public class Comment
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{
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private static readonly Regex _linkRegex = new Regex("((http://|https://|www\\.)([A-Z0-9.\\-]{1,})\\.[0-9A-Z?;~&%\\(\\)#,=\\-_\\./\\+]{2,}[0-9A-Z?~&%#=\\-_/\\+])", RegexOptions.Compiled | RegexOptions.IgnoreCase);
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private const string Link = "<a href=\"{0}{1}\" rel=\"nofollow\">{2}</a>";
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public Comment()
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{
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ID = Guid.NewGuid().ToString();
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PubDate = DateTime.UtcNow;
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}
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public string ID { get; set; }
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public string Author { get; set; }
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public string Email { get; set; }
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public string Website { get; set; }
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public string Content { get; set; }
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public DateTime PubDate { get; set; }
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public string Ip { get; set; }
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public string UserAgent { get; set; }
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public bool IsAdmin { get; set; }
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public bool IsApproved { get; set; }
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public string GravatarUrl(int size)
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{
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var hash = FormsAuthentication.HashPasswordForStoringInConfigFile(Email.ToLowerInvariant(), "MD5").ToLower();
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return string.Format("http://gravatar.com/avatar/{0}?s={1}&d=mm", hash, size);
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}
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public string ContentWithLinks()
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{
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return _linkRegex.Replace(Content, new MatchEvaluator(Evaluator));
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}
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private static string Evaluator(Match match)
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{
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var info = CultureInfo.InvariantCulture;
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return string.Format(info, Link, !match.Value.Contains("://") ? "http://" : string.Empty, match.Value, ShortenUrl(match.Value, 50));
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}
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private static string ShortenUrl(string url, int max)
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{
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if (url.Length <= max)
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{
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return url;
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}
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// Remove the protocal
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var startIndex = url.IndexOf("://");
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if (startIndex > -1)
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{
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url = url.Substring(startIndex + 3);
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}
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if (url.Length <= max)
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{
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return url;
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}
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// Compress folder structure
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var firstIndex = url.IndexOf("/") + 1;
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var lastIndex = url.LastIndexOf("/");
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if (firstIndex < lastIndex)
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{
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url = url.Remove(firstIndex, lastIndex - firstIndex);
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url = url.Insert(firstIndex, "...");
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}
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if (url.Length <= max)
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{
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return url;
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}
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// Remove URL parameters
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var queryIndex = url.IndexOf("?");
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if (queryIndex > -1)
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{
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url = url.Substring(0, queryIndex);
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}
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if (url.Length <= max)
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{
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return url;
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}
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// Remove URL fragment
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var fragmentIndex = url.IndexOf("#");
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if (fragmentIndex > -1)
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{
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url = url.Substring(0, fragmentIndex);
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}
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if (url.Length <= max)
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{
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return url;
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}
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// Compress page
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firstIndex = url.LastIndexOf("/") + 1;
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lastIndex = url.LastIndexOf(".");
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if (lastIndex - firstIndex > 10)
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{
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var page = url.Substring(firstIndex, lastIndex - firstIndex);
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var length = url.Length - max + 3;
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if (page.Length > length)
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{
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url = url.Replace(page, string.Format("...{0}", page.Substring(length)));
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}
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}
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return url;
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}
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}
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