/// <summary>
/// Takes an OAuth code and turns it into an API token.
/// </summary>
/// <param name="code">A code returned from the OAuth page (https://quizlet.com/authorize/)</param>
/// <param name="success">A delegate to be called when the authentication succeeds.</param>
/// <param name="failure">What to do when the authentication fails.</param>
/// <param name="token">A CancellationToken, which is currently useless.</param>
public void Authenticate(string code, Action success, Action<Exception> failure, CancellationToken token)
{
var fields = "grant_type=authorization_code&code=" + code + "&redirect_uri=https://q.asztal.net/";
var req = new HttpsRequest("POST", "/oauth/token");
req.BasicAuthorization(ClientID, SecretKey);
req.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
req.PostData = Encoding.UTF8.GetBytes(fields);
FetchJSON(req,
json => {
try {
if (json is JsonDictionary) {
var ctx = new JsonContext();
var accessToken = ctx.FromJson<string>((json as JsonDictionary).Items["access_token"]);
var userName = ctx.FromJson<string>((json as JsonDictionary).Items["user_id"]);
var tokenExpiry = DateTime.Now.AddSeconds(ctx.FromJson<double>((json as JsonDictionary).Items["expires_in"]));
Credentials = new Credentials(accessToken, userName, tokenExpiry);
success();
} else {
failure(new FormatException("Quizlet server returned an invalid response."));
}
} catch (KeyNotFoundException) {
failure(new FormatException("Quizlet server returned an invalid response."));
} catch (JsonConvertException) {
failure(new FormatException("Quizlet server returned an invalid response."));
}
},
failure,
token);
}
