/// <summary>
/// Make the URL for the Gravatar image of a given email adress.
/// </summary>
/// <param name="email"></param>
/// <param name="extension">Adds .jpg extension to URL.</param>
/// <param name="size">Size, in pixels, of the retrieved image.</param>
/// <param name="ssl">Use a secure connection to retrieve image.</param>
/// <param name="rating">Rating to limit retrieval at. Gravatars above set limit are returned as "default" Gravatar.</param>
/// <param name="defaultOption">Decides what is returned if no Gravatar exists for given email.</param>
/// <param name="defaultUrl">URL to custom default image, if set.</param>
/// <returns>URL for requesting specified Gravatar image.</returns>
public static Uri GetGravatarUrl(
string email,
bool extension = false,
int size = 80,
bool ssl = false,
GravatarRating rating = GravatarRating.PG,
GravatarDefault defaultOption = GravatarDefault.Default,
string defaultUrl = ""
)
{
var sb = new StringBuilder();
sb.Append(ssl ? UrlBaseSsl : UrlBase);
sb.Append(Utility.GravatarHash(email));
sb.Append(extension ? ".jpg" : string.Empty);
sb.Append(CalculateSizeOption(size));
sb.Append(CalculateRatingOption(rating));
sb.Append(CalculateDefaultOption(defaultOption, defaultUrl));
return new Uri(sb.ToString());
}
public static string Gravatar(this UrlHelper helper, string email, int size = 32, GravatarDefault def = GravatarDefault.Default, GravatarRating rating = GravatarRating.G)
{
return GravatarUrl.ForEmail(email).Size(size).Default(def).WithRating(rating);
}
/// <summary>
/// Determine what default-image option to add to the URL.
/// </summary>
/// <param name="option">Chosen option.</param>
/// <param name="customDefaultAdress">Given custom adress</param>
/// <returns>Either nothing, or ?d=X , where X is the given option.</returns>
private static string CalculateDefaultOption(GravatarDefault option, string customDefaultAdress)
{
if (option == GravatarDefault.Default)
{
// No option to add.
return string.Empty;
}
if (option == GravatarDefault.Custom)
{
if (customDefaultAdress == string.Empty)
{
throw new ArgumentException("When custom default is chosen, you need to supply an adress!");
}
return string.Format("?d={0}", System.Web.HttpUtility.UrlEncode(customDefaultAdress));
}
return string.Format("?d={0}", option);
}
public static Uri GetGravatarUrl(string email, GravatarDefault def, string defaultUrl)
{
return GetGravatarUrl(email, false, 80, false, GravatarRating.PG, def, defaultUrl);
}
