private bool CleanupPhoto(CloudQueueMessage msg)
{
Trace.TraceInformation("CleanupPhoto called with {0}", msg.AsString);
var parts = msg.AsString.Split('|');
if (parts.Length != 6)
{
Trace.TraceError("Unexpected input to the photo cleanup queue: {0}", msg.AsString);
return false;
}
try
{
// interpret the string
var photoid = parts[0];
var owner = parts[1];
var url = parts[2];
var rawTags = parts[3];
var thumbnailUrl = parts[4];
var albumId = parts[5];
// the photoRow is already deleted by the frontend to remove from view
// now we need to clean the binaries and the tag information
var repository = new PhotoRepository();
repository.UpdateAlbumData(owner, albumId, thumbnailUrl);
// this cleans up the tag to photo relationship. we will intentionally not
// remove the tag however in here since it doesn't matter
var tags = rawTags.Split(';')
.Where(s => s.Trim().Length > 0)
.Select(s => new Tag() { Name = s.Trim().ToLowerInvariant() })
.ToArray();
repository.RemoveTags(photoid, tags);
// next, let's remove the blobs from storage
var filename = Path.GetFileName(url);
var thumbname = Path.Combine("thumb", filename);
if (!string.IsNullOrEmpty(filename))
{
Trace.TraceWarning("Attempting to delete {0}", filename);
var client = this.storageAccount.CreateCloudBlobClient();
var container = client.GetContainerReference(owner);
var blobGone = container.GetBlobReference(filename).DeleteIfExists();
var thumbGone = container.GetBlobReference(thumbname).DeleteIfExists();
if (!blobGone || !thumbGone)
{
Trace.TraceWarning(string.Format(CultureInfo.InvariantCulture, "Failed to {0}", blobGone ? "Kill Thumb" : thumbGone ? "Kill both" : "Kill blob"));
}
}
}
catch (Exception ex)
{
Trace.TraceError("Cleanup Photo Failure");
Trace.TraceError(ex.ToString());
return false;
}
return true;
}
private bool CreateThumbnail(CloudQueueMessage msg)
{
Trace.TraceInformation("CreateThumbnail called with {0}", msg.AsString);
var parts = msg.AsString.Split('|');
if (parts.Length != 4)
{
Trace.TraceError("Unexpected input to the photo cleanup queue: {0}", msg.AsString);
return false;
}
// interpret the string
var owner = parts[0];
var albumName = parts[1];
var photoid = parts[2];
var file = parts[3];
var repository = new PhotoRepository();
var photo = repository.GetPhotoByOwner(owner, albumName, photoid);
if (photo != null)
{
// create the thumbnail
try
{
this.CreateThumb(owner, file);
}
catch (Exception ex)
{
// creating the thumbnail failed for some reason
Trace.TraceError("CreateThumb failed for {0} and {1}", owner, file);
Trace.TraceError(ex.ToString());
return false; // bail out
}
// update table storage with blob data URLs
var client = this.storageAccount.CreateCloudBlobClient();
var blobUri = client.GetContainerReference(owner).GetBlobReference(file).Uri.ToString();
var thumbUri = client.GetContainerReference(owner).GetBlobReference(Path.Combine("thumb", file)).Uri.ToString();
// update the photo entity with thumb and blob location
photo.ThumbnailUrl = thumbUri;
photo.Url = blobUri;
repository.UpdatePhotoData(photo);
var album = repository.GetAlbumsByOwner(owner).Single(a => a.AlbumId == albumName);
if (!album.HasPhotos || string.IsNullOrEmpty(album.ThumbnailUrl))
{
// update the album
album.HasPhotos = true;
album.ThumbnailUrl = photo.ThumbnailUrl;
repository.UpdateAlbum(album);
}
// parse the tags and save them off
var tags = photo.RawTags.Split(';')
.Where(s => s.Trim().Length > 0)
.Select(s => new Tag { Name = s.Trim().ToLowerInvariant() })
.ToArray();
repository.CreateTags(photoid, tags);
// TODO, aggregate stats
return true;
}
// default
Trace.TraceError("CreateThumbnail error, cannot find {0}", photoid);
return false;
}
private static bool CleanupAlbum(CloudQueueMessage msg)
{
Trace.TraceInformation("CleanupAlbum called with {0}", msg.AsString);
var parts = msg.AsString.Split('|');
if (parts.Length != 2)
{
Trace.TraceError("Unexpected input to the album cleanup queue: {0}", msg.AsString);
return false;
}
// interpret the message
var owner = parts[0];
var album = parts[1];
var repository = new PhotoRepository();
var photos = repository.GetPhotosByAlbum(owner, album);
// this will trigger another message to the queue for more scale!
foreach (var photo in photos)
{
repository.Delete(photo);
}
return true;
}