public async void GetPopularTagListAsync()
{
string timestamp = DateTimeUtils.GetTimestamp();
string nonce = Guid.NewGuid().ToString().Replace("-", null);
string paramString = "oauth_nonce=" + nonce;
paramString += "&oauth_consumer_key=" + consumerKey;
paramString += "&oauth_signature_method=HMAC-SHA1";
paramString += "&oauth_timestamp=" + timestamp;
paramString += "&oauth_version=1.0";
paramString += "&oauth_token=" + AccessToken;
paramString += "&format=json&nojsoncallback=1";
paramString += "&method=flickr.tags.getHotList";
string signature = GenerateSignature("GET", AccessTokenSecret, "https://api.flickr.com/services/rest/", paramString);
string requestUrl = "https://api.flickr.com/services/rest/?" + paramString + "&oauth_signature=" + signature;
HttpWebResponse response = await DispatchRequest("GET", requestUrl, null).ConfigureAwait(false);
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
if (response.StatusCode != HttpStatusCode.OK)
{
HandleHTTPException(response);
return;
}
string jsonString = await reader.ReadToEndAsync().ConfigureAwait(false);
if (!IsResponseSuccess(jsonString))
return;
GetPopularTagListEventArgs args = new GetPopularTagListEventArgs();
args.Response = jsonString;
PopularTagListReturned.DispatchEvent(this, args);
}
}
private void OnPopularTagListReturned(object sender, GetPopularTagListEventArgs e)
{
JObject rawJson = JObject.Parse(e.Response);
JObject rootJson = (JObject)rawJson["hottags"];
List<PhotoTag> result = new List<PhotoTag>();
foreach (JObject json in rootJson["tag"])
{
PhotoTag tag = new PhotoTag();
tag.Name = json["_content"].ToString();
tag.Weight = int.Parse(json["score"].ToString());
result.Add(tag);
}
PopularTagListUpdatedEventArgs evt = new PopularTagListUpdatedEventArgs();
evt.Tags = result;
PopularTagsUpdated.DispatchEvent(this, evt);
}
