/BlogEngine/BlogEngine.NET/App_Code/Controls/AuthorList.cs

// --------------------------------------------------------------------------------------------------------------------

// <summary>

//   Builds an author list.

// </summary>

// --------------------------------------------------------------------------------------------------------------------



namespace App_Code.Controls

{

    using System;

    using System.Web.Security;

    using System.Web.UI;

    using System.Web.UI.HtmlControls;

    using System.Collections.Generic;

    using BlogEngine.Core;



    using Resources;



    /// <summary>

    /// Builds an author list.

    /// </summary>

    public class AuthorList : Control

    {

        #region Constants and Fields



        /// <summary>

        /// The html string.

        /// </summary>

        private static Dictionary<Guid, string> blogsHtml = new Dictionary<Guid, string>();



        /// <summary>

        /// The show rss icon.

        /// </summary>

        private static Dictionary<Guid, bool> blogsShowRssIcon = new Dictionary<Guid, bool>();



        #endregion



        #region Constructors and Destructors



        /// <summary>

        /// Initializes static members of the <see cref="AuthorList"/> class. 

        /// </summary>

        static AuthorList()

        {

            Post.Saved += (sender, args) => blogsHtml.Remove(Blog.CurrentInstance.Id);

        }



        #endregion



        #region Properties



        /// <summary>

        ///     Gets or sets a value indicating whether or not to show feed icons next to the category links.

        /// </summary>

        public bool ShowRssIcon

        {

            get

            {

                Guid blogId = Blog.CurrentInstance.Id;



                if (!blogsShowRssIcon.ContainsKey(blogId))

                    blogsShowRssIcon[blogId] = true;



                return blogsShowRssIcon[blogId];

            }



            set

            {

                if (ShowRssIcon == value)

                {

                    return;

                }



                blogsShowRssIcon[Blog.CurrentInstance.Id] = value;

                blogsHtml.Remove(Blog.CurrentInstance.Id);

            }

        }



        /// <summary>

        ///     Gets the rendered HTML in the private field and first

        ///     updates it when a post has been saved (new or updated).

        /// </summary>

        private string Html

        {

            get

            {

                Guid blogId = Blog.CurrentInstance.Id;



                if (!blogsHtml.ContainsKey(blogId))

                    blogsHtml[blogId] = string.Empty;



                return blogsHtml[blogId];

            }

        }



        #endregion



        #region Public Methods



        /// <summary>

        /// Outputs server control content to a provided <see cref="T:System.Web.UI.HtmlTextWriter"/> object and stores tracing information about the control if tracing is enabled.

        /// </summary>

        /// <param name="writer">The <see cref="T:System.Web.UI.HtmlTextWriter"/> object that receives the control content.</param>

        public override void RenderControl(HtmlTextWriter writer)

        {

            writer.Write(Html);

            writer.Write(Environment.NewLine);

        }



        #endregion



        #region Methods



        /// <summary>

        /// Loops through all users and builds the HTML

        /// presentation.

        /// </summary>

        /// <returns>The authors.</returns>

        private HtmlGenericControl BindAuthors()

        {

            if (Post.Posts.Count == 0)

            {

                var p = new HtmlGenericControl("p") { InnerHtml = labels.none };

                return p;

            }



            var ul = new HtmlGenericControl("ul") { ID = "authorlist" };



            foreach (MembershipUser user in Membership.GetAllUsers())

            {

                var postCount = Post.GetPostsByAuthor(user.UserName).Count;

                if (postCount == 0)

                {

                    continue;

                }



                var li = new HtmlGenericControl("li");



                if (ShowRssIcon)

                {

                    var img = new HtmlImage

                        {

                            Src = string.Format("{0}pics/rssButton.png", Utils.RelativeWebRoot),

                            Alt = string.Format("RSS feed for {0}", user.UserName)

                        };

                    img.Attributes["class"] = "rssButton";



                    var feedAnchor = new HtmlAnchor

                        {

                            HRef =

                                string.Format("{0}syndication.axd?author={1}", Utils.RelativeWebRoot, Utils.RemoveIllegalCharacters(user.UserName))

                        };

                    feedAnchor.Attributes["rel"] = "nofollow";

                    feedAnchor.Controls.Add(img);



                    li.Controls.Add(feedAnchor);

                }



                var anc = new HtmlAnchor

                    {

                        HRef = string.Format("{0}author/{1}{2}", Utils.RelativeWebRoot, user.UserName, BlogConfig.FileExtension),

                        InnerHtml = string.Format("{0} ({1})", user.UserName, postCount),

                        Title = string.Format("Author: {0}", user.UserName)

                    };



                li.Controls.Add(anc);

                ul.Controls.Add(li);

            }



            return ul;

        }



        #endregion

    }

}