Heltblank

.NET UserControl displaing a Twitter Search (Atom feed)

This sample code shows how to add a Twitter rss, or to be exact atom feed to a .NET page/usercontrol.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml.Linq;
using Stormberg.Util;
using System.ServiceModel.Syndication;
using System.Xml;

namespace HeltBlank.social
{
    public partial class twitter : System.Web.UI.UserControl
    {
        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);

            //Semicolon seperated string with searchwords; ex "@ravnevand;#ravnevand"
            if (TwitterSearch != null)
            {
                List lst = new List();

                string[] split = TwitterSearch.ToString().Split(';');

                foreach (string s in split)
                {
                    AddRange(lst, s);
                }

                if (lst.Count() > 0)
                {
                    rep.DataSource = (from p in lst orderby p.Date descending select p).Take(10);
                    rep.DataBind();
                }
            }
            else
                this.Visible = false;
        }

        private void AddRange(List lst, string searchword)
        {
            if (searchword.Trim() != string.Empty)
            {
                XmlReader reader = XmlReader.Create(@"http://search.twitter.com/search.atom?q=" + HttpUtility.UrlEncode(searchword.Trim()));
                SyndicationFeed feed = SyndicationFeed.Load(reader);

                if (feed != null && feed.Items.Count() > 0)
                {
                    var sotcPosts = from entry in feed.Items
                                    from a in entry.Authors
                                    select new RssPost
                                    {
                                        Title = entry.Title.Text,
                                        Link = (from p in entry.Links where p.RelationshipType == "alternate" select p.Uri).FirstOrDefault().ToString(),
                                        Image = (from p in entry.Links where p.RelationshipType == "image" select p.Uri).FirstOrDefault().ToString(),
                                        Date = entry.PublishDate.DateTime,
                                        Author = a.Name,
                                        AuthorUri = a.Uri
                                    };

                    if (sotcPosts.Count() > 0)
                    {
                        lst.AddRange(sotcPosts);
                    }
                }
            }
        }

        //Use this in your repeater itemtemplate like this:
        //<%# AuthorLink(Eval("Author"), Eval("AuthorUri")) %>

        protected string AuthorLink(object author, object url)
        {
            string a = author.ToString();
            string username = a.Substring(0, a.IndexOf(" ")).Trim();
            a = a.Replace(username, string.Empty).Replace("(", string.Empty).Replace(")", string.Empty).Trim();

            return iRec.Util.XHTML.Link(url.ToString(), string.Empty, a, a);
        }

        //Use this in your repeater itemtemplate like this:
        //<%# TimeAgo((DateTime)Eval("Date")) %>
        protected string TimeAgo(DateTime d)
        {
            TimeSpan ts = DateTime.Now - d;

            if(ts.Days > 1)
                return "ca " + ts.Days + " days";
            if (ts.Days == 1)
                return "ca 1 day";

            if (ts.Hours > 1)
                return "ca " + ts.Hours + " hours";
            if (ts.Hours == 1)
                return "ca 1 hour";

            if (ts.Minutes > 1)
                return ts.Minutes + " minutes";
            if (ts.Minutes == 1)
                return "1 minute";

            if (ts.Minutes > 1)
                return ts.Seconds + " seconds";

            return ts.Seconds + " second";
        }

        public object TwitterSearch { get; set; }
    }


    public class RssPost
    {
        public string Link { get; set; }
        public string Title { get; set; }
        public string Lead { get; set; }
        public string Image { get; set; }
        public string Author { get; set; }
        public string AuthorUri { get; set; }
        public DateTime Date { get; set; }
    }
}