private async Task <bool> CheckLogin()
{
if (FlickrNet == null || FlickrNet.OAuthAccessToken == null || FlickrNet.OAuthAccessTokenSecret == null)
{
IsAuthenticated = false;
return(IsAuthenticated);
}
try
{
var user = await FlickrNet.RetryOnFailureAsync(f => f.TestLoginAsync());
if (user != null)
{
UserName = user.UserName;
var info = await FlickrNet.RetryOnFailureAsync(f => f.PeopleGetInfoAsync(user.UserId));
IconUri = new Uri(int.TryParse(info.IconServer, out int iconServer) && iconServer > 0
? $"http://farm{info.IconFarm}.staticflickr.com/{iconServer}/buddyicons/{user.UserId}.jpg"
: "https://www.flickr.com/images/buddyicon.gif");
IsAuthenticated = true;
}
else
{
IsAuthenticated = false;
}
}
catch (Exception)
{
IsAuthenticated = false;
}
return(IsAuthenticated);
}
public async Task <bool> AuthenticateAsync(string validation)
{
var accessToken = await FlickrNet.RetryOnFailureAsync(f => f.OAuthAccessTokenAsync(requestToken.Token, requestToken.TokenSecret, validation));
FlickrNet.OAuthAccessToken = accessToken.Token;
FlickrNet.OAuthAccessTokenSecret = accessToken.TokenSecret;
if (await CheckLogin())
{
var localSettings = ApplicationData.Current.LocalSettings;
localSettings.Values["accessToken"] = accessToken.Token;
localSettings.Values["tokenSecret"] = accessToken.TokenSecret;
RequestToken = null;
}
return(IsAuthenticated);
}
public async Task <string> GetAuthPageUrlAsync(string callbackUrl = DefaultCallbackUrl)
{
RequestToken = await FlickrNet.RetryOnFailureAsync(f => f.OAuthRequestTokenAsync(callbackUrl));
return(FlickrNet.OAuthCalculateAuthorizationUrl(RequestToken.Token, AuthLevel.Write));
}