/BlogEngine/DotNetSlave.BusinessLogic/Avatar.cs

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

// <summary>

//   Avatar support.

// </summary>

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



namespace BlogEngine.Core

{

    using System;

    using System.Globalization;

    using System.Web;

    using System.Web.Security;



    /// <summary>

    /// Avatar support.

    /// </summary>

    public class Avatar

    {

        #region Constants and Fields



        /// <summary>

        ///     The avatar image.

        /// </summary>

        private const string AvatarImage = "<img class=\"photo\" src=\"{0}\" alt=\"{1}\" />";



        /// <summary>

        ///     Gets or sets the URL to the Avatar image.

        /// </summary>

        public Uri Url { get; set; }



        /// <summary>

        ///     Gets or sets the image tag for the Avatar image.

        /// </summary>

        public string ImageTag { get; set; }



        /// <summary>

        ///    Gets or sets a value indicating whether there is not a specific image available.

        /// </summary>

        public bool HasNoImage { get; set; }



        #endregion



        #region Public Methods



        /// <summary>

        /// Returns the avatar/gravatar that matches the specified email, website or avatar Url.

        /// </summary>

        /// <param name="size">

        /// The image size.

        /// </param>

        /// <param name="email">

        /// Email address.

        /// </param>

        /// <param name="website">

        /// The website URL.

        /// </param>

        /// <param name="avatarUrl">

        /// An optional avatar URL to use instead of the default.

        /// </param>

        /// <param name="description">

        /// Description used for the Alt/Title attributes.

        /// </param>

        /// <returns>

        /// The avatar/gravatar image.

        /// </returns>

        public static Avatar GetAvatar(int size, string email, Uri website, string avatarUrl, string description)

        {

            if (BlogSettings.Instance.Avatar == "none")

            {

                return new Avatar { HasNoImage = true };

            }



            string imageTag;

            Uri url;



            if (!string.IsNullOrEmpty(avatarUrl) && Uri.TryCreate(avatarUrl, UriKind.RelativeOrAbsolute, out url))

            {

                imageTag = string.Format(

                    CultureInfo.InvariantCulture, AvatarImage, url, HttpUtility.HtmlEncode(description));



                return new Avatar { Url = url, ImageTag = imageTag };

            }



            if (string.IsNullOrEmpty(email) || !email.Contains("@"))

            {

                if (website != null && website.ToString().Length > 0 && website.ToString().Contains("http://"))

                {

                    url =

                        new Uri(

                            string.Format(

                                "http://cligs.websnapr.com/?url={0}&amp;size=t", 

                                HttpUtility.UrlEncode(website.ToString())));



                    imageTag = string.Format(

                        CultureInfo.InvariantCulture, "<img class=\"thumb\" src=\"{0}\" alt=\"{1}\" />", url, email);



                    return new Avatar { Url = url, ImageTag = imageTag };

                }



                var themeAvatar = HttpContext.Current.Server.MapPath(string.Format("{0}themes/{1}/noavatar.jpg", Utils.RelativeWebRoot, BlogSettings.Instance.Theme));



                var uri = 

                    new Uri(

                        System.IO.File.Exists(themeAvatar) ? 

                        string.Format("{0}themes/{1}/noavatar.jpg", Utils.AbsoluteWebRoot, BlogSettings.Instance.Theme) : 

                        string.Format("{0}pics/noavatar.jpg", Utils.AbsoluteWebRoot));



                imageTag = string.Format("<img src=\"{0}\" alt=\"{1}\" />", uri, description);



                return new Avatar { Url = uri, ImageTag = imageTag, HasNoImage = true };

            }



            var hash = FormsAuthentication.HashPasswordForStoringInConfigFile(email.ToLowerInvariant().Trim(), "MD5");

            if (hash != null)

            {

                hash = hash.ToLowerInvariant();

            }



            var gravatar = string.Format("http://www.gravatar.com/avatar/{0}.jpg?s={1}&amp;d=", hash, size);



            string link;

            switch (BlogSettings.Instance.Avatar)

            {

                case "identicon":

                    link = string.Format("{0}identicon", gravatar);

                    break;



                case "wavatar":

                    link = string.Format("{0}wavatar", gravatar);

                    break;



                default:

                    link = string.Format("{0}monsterid", gravatar);

                    break;

            }



            imageTag = string.Format(

                CultureInfo.InvariantCulture, AvatarImage, link, HttpUtility.HtmlEncode(description));



            return new Avatar { Url = new Uri(link), ImageTag = imageTag };

        }



        /// <summary>

        /// Returns the avatar/gravatar image tag that matches the specified email, website or avatar Url.

        /// </summary>

        /// <param name="size">

        /// The image size.

        /// </param>

        /// <param name="email">

        /// Email address.

        /// </param>

        /// <param name="website">

        /// The website URL.

        /// </param>

        /// <param name="avatarUrl">

        /// An optional avatar URL to use instead of the default.

        /// </param>

        /// <param name="description">

        /// Description used for the Alt/Title attributes.

        /// </param>

        /// <returns>

        /// The avatar/gravatar image.

        /// </returns>

        public static string GetAvatarImageTag(

            int size, string email, Uri website, string avatarUrl, string description)

        {

            var avatar = GetAvatar(size, email, website, avatarUrl, description);

            return avatar == null ? string.Empty : avatar.ImageTag;

        }



        #endregion

    }

}