public void RegisterPhoto (ICacheablePhotoSource source, IPhoto photo)
{
if (source.CacheId == 0) {
throw new Exception ("The source needs to be registered first using RegisterPhotoSource ()");
}
var cache_photo = SqliteCachedPhoto.CreateFrom (photo);
cache_photo.SourceId = source.CacheId;
provider.Save (cache_photo);
source.RegisterCachedPhoto (photo, cache_photo.CacheId);
}
public void RegisterPhotoSource (ICacheablePhotoSource source)
{
if (source.CacheId != 0) {
throw new Exception ("Can't register an already registered source!");
}
var cache = new SqliteCachedPhotoSource (source);
cache.AvailabilityChanged += OnCachedSourceAvailabilityChanged;
source_provider.Save (cache);
source.CacheId = cache.CacheId;
source.Persist ();
cache.Start (this);
}
public SqliteCachedPhotoSource (ICacheablePhotoSource source)
{
instance = source;
instance.AvailabilityChanged += (s, a) => UpdateAvailability ();
SourceType = instance.GetType ().FullName;
}
void EnsureInstance ()
{
if (instance_create_failed)
throw new PhotoSourceNotAvailableException ();
lock (this) {
if (instance == null) {
Type type = null;
if (!PhotoSourceInfoManager.Instance.PhotoSourceTypes.TryGetValue (SourceType, out type)) {
instance_create_failed = true;
UpdateAvailability ();
throw new PhotoSourceNotAvailableException ();
}
instance = Activator.CreateInstance (type) as ICacheablePhotoSource;
instance.CacheId = CacheId;
instance.WakeUp ();
instance.AvailabilityChanged += (s, a) => UpdateAvailability ();
}
}
}
