private static async Task RequestImagePathForCalendarStartRequestAsync(BingImageInfo info, RangeRequestInfo rangeInfo)
{
DateTime date;
string path = null;
Debug.WriteLine("Task for " + info.StartDate + " started");
if (!BingDataHelper.TryConvertStartdate(info.StartDate, out date))
{
rangeInfo.Callback(date, false, null);
return;
}
if (RequestImagePathCheckCache(info.StartDate, out path))
{
rangeInfo.Callback(date, true, path);
return;
}
await calendarRequestSemaphore.WaitAsync();
try
{
if (rangeInfo.IsCancelled) return;
var fileName = info.StartDate + ".jpg";
var filePath = Path.Combine(Setting.GetCurrentSetting().TempPath.LocalPath, fileName);
if (File.Exists(filePath)) File.Delete(filePath);
// see if we can grab the 1080 source. if failed, try to get the 1366 source
if (await RequestImagePathTryBingApiAsync(new Uri(BingBaseUri, info.Url), date, rangeInfo, filePath))
{
if (rangeInfo.IsCancelled) return;
if (RequestImagePathCheckCache(info.StartDate, out path))
{
rangeInfo.Callback(date, true, path);
return;
}
}
else if (await RequestImagePathTryBingApiAsync(new Uri(BingBaseUri, info.UrlBase + "_1366x768.jpg"), date, rangeInfo, filePath))
{
if (rangeInfo.IsCancelled) return;
if (RequestImagePathCheckCache(info.StartDate, out path))
{
rangeInfo.Callback(date, true, path);
return;
}
}
}
catch (Exception e)
{
// any exception cause the thread to fail
Debug.WriteLine(e.Message);
}
finally
{
rangeInfo.RemoveRequest(date);
calendarRequestSemaphore.Release();
}
if (!rangeInfo.IsCancelled) rangeInfo.Callback(date, false, null);
}
