SearchViewBox.ascx.cs :  » Bloggers » dasBlog » newtelligence » DasBlog » Web » C# / CSharp Open Source

using System;
using System.Collections.Specialized;
using System.Globalization;
using System.Resources;
using System.Text.RegularExpressions;
using System.Web.UI;
using System.Web.UI.WebControls;
using newtelligence.DasBlog.Runtime;
using newtelligence.DasBlog.Util;
using newtelligence.DasBlog.Web.Core;

namespace newtelligence.DasBlog.Web{
  /// <summary>
  /// Summary description for WebForm1.
  /// </summary>
  public partial class SeachViewBox : UserControl
  {
    private SharedBasePage requestPage;
    protected ResourceManager resmgr;

    private static Regex stripTags = new Regex("<[^>]*>", RegexOptions.Compiled | RegexOptions.CultureInvariant);

    protected void Page_Init(object sender, EventArgs e)
    {
      resmgr = ApplicationResourceTable.Get();

      requestPage = Page as SharedBasePage;

      if (Request.QueryString["q"] != null && Page.IsPostBack == false)
      {
        string searchQuery = System.Web.HttpUtility.UrlDecode(Request.QueryString["q"]);
        EntryCollection entries = SearchEntries(searchQuery);

        requestPage.WeblogEntries.AddRange(entries);

        foreach (Entry entry in requestPage.WeblogEntries)
        {
          requestPage.ProcessItemTemplate(entry, contentPlaceHolder);
        }
      }
      else
      {
        requestPage.WeblogEntries.AddRange(new EntryCollection());
      }

      labelSearchQuery.Text = String.Format("{0}: {1}", resmgr.GetString("text_search_query_title"), Request.QueryString["q"]);

      DataBind();
    }

    #region Web Form Designer generated code

    protected override void OnInit(EventArgs e)
    {
      //
      // CODEGEN: This call is required by the ASP.NET Web Form Designer.
      //
      InitializeComponent();
      base.OnInit(e);
    }

    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
      this.Init += new EventHandler(this.Page_Init);
    }

    #endregion

    public EntryCollection SearchEntries(string searchString)
    {
      StringCollection searchWords = new StringCollection();

      string[] splitString = Regex.Split(searchString, @"(""[^""]*"")", RegexOptions.IgnoreCase |
        RegexOptions.Compiled);

      for (int index = 0; index < splitString.Length; index++)
      {
        if (splitString[index] != "")
        {
          if (index == splitString.Length - 1)
          {
            foreach (string s in splitString[index].Split(' '))
            {
              if (s != "") searchWords.Add(s);
            }
          }
          else
          {
            searchWords.Add(splitString[index].Substring(1, splitString[index].Length - 2));
          }
        }
      }

      EntryCollection matchEntries = new EntryCollection();

      foreach (Entry entry in requestPage.DataService.GetEntriesForDay(DateTime.MaxValue.AddDays(-2), new UTCTimeZone(), Request.Headers["Accept-Language"], int.MaxValue, int.MaxValue, null))
      {
        string entryTitle = entry.Title;
        string entryDescription = entry.Description;
        string entryContent = entry.Content;

        foreach (string searchWord in searchWords)
        {
          if (entryTitle != null)
          {
            if (searchEntryForWord(entryTitle, searchWord))
            {
              if (!matchEntries.Contains(entry))
              {
                matchEntries.Add(entry);
              }
              continue;
            }
          }
          if (entryDescription != null)
          {
            if (searchEntryForWord(entryDescription, searchWord))
            {
              if (!matchEntries.Contains(entry))
              {
                matchEntries.Add(entry);
              }
              continue;
            }
          }
          if (entryContent != null)
          {
            if (searchEntryForWord(entryContent, searchWord))
            {
              if (!matchEntries.Contains(entry))
              {
                matchEntries.Add(entry);
              }
              continue;
            }
          }
        }
      }

      // log the search to the event log
            ILoggingDataService logService = requestPage.LoggingService;
      string referrer = Request.UrlReferrer != null ? Request.UrlReferrer.AbsoluteUri : Request.ServerVariables["REMOTE_ADDR"];  
      logService.AddEvent(
        new EventDataItem(EventCodes.Search, String.Format("{0}", searchString), referrer));

      return matchEntries;
    }

    private bool searchEntryForWord(string sourceText, string searchWord)
    {
      // Remove any tags from sourceText.
      sourceText = stripTags.Replace(sourceText, String.Empty);

      CompareInfo myComp = CultureInfo.InvariantCulture.CompareInfo;
      return (myComp.IndexOf(sourceText, searchWord, CompareOptions.IgnoreCase) >= 0);
    }
  }
}