private List <ContextTrack> GetPage(int index)
{
if (index == -1)
{
throw new Exception("You must call nextPage() first!");
}
if (index == 0 && !_pages.Any() && _resolveUrl != null)
{
var m = _session.Mercury().SendSync(MercuryRequests.ResolveContext(_resolveUrl));
var x = ProtoUtils.JsonToContextPages(JObject.Parse(m)["pages"] as JArray);
_pages.AddRange(x);
}
_resolveUrl = null;
if (index < _pages.Count)
{
var page = _pages[index];
var tracks = ResolvePage(page);
page.ClearPageUrl();
page.Tracks.Clear();
page.Tracks.Add(tracks);
_pages[index] = page;
return(tracks);
}
else
{
if (index > _pages.Count)
{
throw new IndexOutOfRangeException();
}
var prev = _pages[index - 1];
if (!prev.HasNextPageUrl)
{
throw new Exception("Illegal State");
}
var nextPageUrl = prev.NextPageUrl;
prev.ClearNextPageUrl();
_pages[index - 1] = prev;
var tracks = FetchTracks(nextPageUrl);
var tr = new ContextPage();
tr.Tracks.AddRange(tracks);
_pages.Add(tr);
return(tracks);
}
}
