/// <summary>
/// Resolves and returns a <see cref="Uri"/> based on the template given
/// during construction and the data provided for <paramref name="templateData"/>.
/// </summary>
public Uri?ResolveTemplate(UriTemplateData templateData)
{
if (templateData is null)
{
throw new ArgumentNullException(nameof(templateData));
}
var rawUri = _templateResolver(templateData);
if (string.IsNullOrWhiteSpace(rawUri))
{
return(null);
}
return(new Uri(rawUri));
}
/// <inheritdoc/>
public async Task <Image?> GetAvatarAsync(string email, string?name, int imageSize)
{
var templateData = new UriTemplateData(email, name, imageSize);
foreach (var provider in _subProvider)
{
var avatar = provider switch
{
UriTemplateResolver r => await _downloader.DownloadImageAsync(r.ResolveTemplate(templateData)),
_ => await provider.GetAvatarAsync(email, name, imageSize),
};
if (avatar is not null)
{
return(avatar);
}
}
return(null);
}
