private void AssertThread(ImageCacheInfo cacheInfo, int taskId)
{
if (cacheInfo.GetCurrentTaskId() != taskId)
{
throw new TaskCanceledException();
}
}
/// <summary>キャッシュ情報から画像データを取得する</summary>
/// <param name="cacheInfo">キャッシュ情報</param>
/// <param name="userInfo">ユーザ情報</param>
/// <returns>画像データ</returns>
private BitmapImage LoadImage(ImageCacheInfo cacheInfo, IUserInfo userInfo)
{
int taskId = cacheInfo.GetCurrentTaskId();
this.AssertThread(cacheInfo, taskId);
var imageUrl = userInfo.ProfileImageUrl;
if (string.IsNullOrEmpty(imageUrl))
{
return(null);
}
var imageFileName = Path.GetFileName(imageUrl);
var @params = CreateParameter(userInfo);
this.AssertThread(cacheInfo, taskId);
if (this.TryFindCache(@params, imageFileName, out var imageData))
{
this.AssertThread(cacheInfo, taskId);
return(ImageUtil.CreateBitmapImage(new MemoryStream(imageData)));
}
this.AssertThread(cacheInfo, taskId);
if (this.TryDownloadImage(userInfo, out var imageStream))
{
this.AssertThread(cacheInfo, taskId);
//@params.Add("filename", imageFileName);
//@params.Add("image_data", imageStream.ToArray());
//this.WriteCache(@params);
this.AssertThread(cacheInfo, taskId);
return(ImageUtil.CreateBitmapImage(imageStream));
}
this.AssertThread(cacheInfo, taskId);
return(null);
}