Wednesday, December 12, 2007

[Extension("Filters comments containing bad words", "1.0", "Mads Kristensen")]

public class BadWordFilter

{

  // Constructor

  public BadWordFilter()

  {

    // Add the event handler for the CommentAdded event

    Post.AddingComment += new EventHandler<CancelEventArgs>(Post_AddingComment);

  }

  // The collection of bad words

  private static readonly StringCollection BAD_WORDS = AddBadWords();

  // Add bad words to the collection

  private static StringCollection AddBadWords()

  {

    StringCollection col = new StringCollection();

    col.Add("VIAGRA");

    col.Add("CASINO");

    col.Add("MORTAGE");

    return col;

  }

  // Handle the AddingComment event

  private void Post_AddingComment(object sender, CancelEventArgs e)

  {

    Comment comment = (Comment)sender;

    string body = comment.Content.ToUpperInvariant();

    // Search for bad words in the comment body

    foreach (string word in BAD_WORDS)

    {

      if (body.Contains(word))

      {

        // Cancel the comment and raise the SpamAttack event

        e.Cancel = true;

        Comment.OnSpamAttack();

        break;

      }

    }

  }

}