public void JoinGroupAsync(string groupId, Dictionary<string, string> parameters = null)
{
string timestamp = DateTimeUtils.GetTimestamp();
string nonce = Guid.NewGuid().ToString().Replace("-", null);
Dictionary<string, string> paramDict = new Dictionary<string, string>();
paramDict["method"] = "flickr.groups.join";
paramDict["format"] = "json";
paramDict["nojsoncallback"] = "1";
paramDict["oauth_consumer_key"] = consumerKey;
paramDict["oauth_nonce"] = nonce;
paramDict["oauth_signature_method"] = "HMAC-SHA1";
paramDict["oauth_timestamp"] = timestamp;
paramDict["oauth_token"] = AccessToken;
paramDict["oauth_version"] = "1.0";
paramDict["group_id"] = groupId;
if (parameters != null)
{
foreach (var entry in parameters)
{
paramDict[entry.Key] = entry.Value;
}
}
string signature = OAuthCalculateSignature("POST", "https://api.flickr.com/services/rest/", paramDict, AccessTokenSecret);
paramDict["oauth_signature"] = signature;
DispatchPostRequest("POST", "https://api.flickr.com/services/rest/", paramDict,
(response) =>
{
bool success = true;
string errorMessage = "";
try
{
JObject json = JObject.Parse(response);
string status = json["stat"].ToString();
if (status != "ok")
{
success = false;
errorMessage = json["message"].ToString();
}
}
catch (Exception e)
{
Debug.WriteLine(e.Message);
success = false;
}
if (!success)
{
var exceptionEvt = new JoinGroupExceptionEventArgs();
exceptionEvt.GroupId = groupId;
exceptionEvt.Message = errorMessage;
JoinGroupException.DispatchEvent(this, exceptionEvt);
}
else
{
var evt = new JoinGroupEventArgs();
evt.GroupId = groupId;
GroupJoined.DispatchEvent(this, evt);
}
}, (ex) =>
{
var exceptionEvt = new JoinGroupExceptionEventArgs();
exceptionEvt.GroupId = groupId;
exceptionEvt.Message = "Unknown network error";
JoinGroupException.DispatchEvent(this, exceptionEvt);
});
}
private void OnJoinGroupException(object sender, JoinGroupExceptionEventArgs e)
{
Dispatcher.BeginInvoke(() => {
if (e.GroupId != Group.ResourceId)
return;
ProgressView.Visibility = Visibility.Collapsed;
StatusLabel.Text = e.Message;
doneButton.IsEnabled = true;
});
}
