private static async Task <OAuthCredentials> GetSpotifyCredentials(string PostBody, string clientId, string clientSecret, string refreshToken = null)
{
string b64 = Convert.ToBase64String(Encoding.UTF8.GetBytes($"{clientId}:{clientSecret}"));
HttpRequestMessage request = WebRequestHelpers.SetupRequest(SpotifyAPITokenUrl, "Basic", b64, HttpMethod.Post);
HttpContent content = new StringContent(PostBody, Encoding.UTF8, "application/x-www-form-urlencoded");
request.Content = content;
HttpResponseMessage response = await WebRequestHelpers.Client.SendAsync(request);
if (response.IsSuccessStatusCode)
{
string jsonstring = await response.Content.ReadAsStringAsync();
JObject jobj = Newtonsoft.Json.Linq.JObject.Parse(jsonstring);
string accessToken = jobj.GetValue("access_token").ToString();
int expiresIn = Convert.ToInt32(jobj.GetValue("expires_in").ToString());
if (string.IsNullOrWhiteSpace(refreshToken))
{
refreshToken = jobj.GetValue("refresh_token").ToString();
}
return(new OAuthCredentials("unknown user", accessToken, expiresIn, refreshToken));
}
else
{
return(OAuthCredentials.CrendentialError);
}
}
/// <summary>
/// Returns a new paging object with the previous {limit} number of items
/// Throws an IndexOutOfRangeException if there are no more items
/// </summary>
/// <returns></returns>
public async Task <Paging <T> > GetPrevious(string accessToken)
{
if (string.IsNullOrWhiteSpace(Previous) || Offset <= 0)
{
throw new IndexOutOfRangeException($"Offset({Offset}) already at or below 0. There are no more items left to get");
}
else /* There are items left to get, so return a new paging object with that offset*/
{
HttpRequestMessage message = WebRequestHelpers.SetupRequest(this.Previous, accessToken);
HttpResponseMessage response = await WebRequestHelpers.Client.SendAsync(message);
if (response.IsSuccessStatusCode)
{
JToken token = await WebRequestHelpers.ParseJsonResponse(response.Content);
Paging <T> paging = new Paging <T>(token);
return(paging);
}
}
return(null);
}
/// <summary>
/// Returns a new Cursor-Based Paging object with the next {Limit} number of items,
/// starting after the {After} fields
/// Throws an IndexOutOfRangeException if there are no more items
/// </summary>
/// <returns></returns>
public async Task <CursorBasedPaging <T> > GetNext(string accessToken)
{
/* Offset is past the total - therefore there's nothing left to get */
if (string.IsNullOrWhiteSpace(Next))
{
throw new IndexOutOfRangeException($"There are no more items left to get");
}
else /* There are items left to get, so return a new paging object with that offset*/
{
HttpRequestMessage message = WebRequestHelpers.SetupRequest(this.Next, accessToken);
HttpResponseMessage response = await WebRequestHelpers.Client.SendAsync(message);
if (response.IsSuccessStatusCode)
{
JToken token = await WebRequestHelpers.ParseJsonResponse(response.Content);
CursorBasedPaging <T> paging = new CursorBasedPaging <T>(token);
return(paging);
}
}
return(null);
}