public async Task <List <T> > PerformIncrementalPostAsync <T>(string url, int itemsToGet = 0)
{
HttpClient client = GetHttpClient();
List <T> results = new List <T>();
int totalTracks = 0;
string nextPageToken = null;
string prevPageToken = null;
do
{
JObject requestData = new JObject()
{
{ "max-results", "20000" },
{ "start-token", nextPageToken }
};
IncrementalResponse <T> response = await PerformPostAsync <IncrementalResponse <T> >(url, requestData);
// sometimes the previous request will include a non null next page token, so we fetch and get no data
// which results in null data and null nextpagetoken. In this case, we've fetched all we can, so return
// what we've fetched.
if (response.Data == null)
{
if (response.NextPageToken == null)
{
return(results);
}
else
{
// TODO: error?
return(results);
}
}
results.AddRange(response.Data.Items);
totalTracks += response.Data.Items.Count;
if (itemsToGet != 0)
{
if (totalTracks < itemsToGet)
{
prevPageToken = nextPageToken;
nextPageToken = response.NextPageToken;
}
else
{
return(results.Take(itemsToGet).ToList());
}
}
else
{
prevPageToken = nextPageToken;
nextPageToken = response.NextPageToken;
}
}while (nextPageToken != null);
return(results);
}
private async void incrementalTracksGetButton_Click(object sender, EventArgs e)
{
try
{
IncrementalResponse <Track> resp = await gpmClient.GetLibraryIncrementalAsync(10, null);
Debug.WriteLine(resp.NextPageToken);
Debug.WriteLine(resp.Data.Items[0].ToString());
resp = await gpmClient.GetLibraryIncrementalAsync(10, resp.NextPageToken);
Debug.WriteLine(resp.NextPageToken);
Debug.WriteLine(resp.Data.Items[0].ToString());
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
/// <summary>
/// Get a list of devices associated with the account
/// </summary>
/// <returns></returns>
public async Task <List <Device> > GetDevicesAsync()
{
IncrementalResponse <Device> response = await GetAsync <IncrementalResponse <Device> >(SJ_URL_DEVICE_MANAGEMENT);
return(response.Data.Items);
}