def __get_albums(type, subtype):
# Helper function: constructs dictionary with user / smart albums
# Sort albums in ascending order, based on their localized title
PHAssetCollection = ObjCClass("PHAssetCollection")
NSSortDescriptor = ObjCClass("NSSortDescriptor")
PHFetchOptions = ObjCClass("PHFetchOptions")
fetchOptions = PHFetchOptions.alloc().init().autorelease()
fetchOptions.sortDescriptors = [
NSSortDescriptor.sortDescriptorWithKey_ascending_(
"localizedTitle", True)
]
# Fetch the albums with the specified type and return a list of their unique identifiers
result = PHAssetCollection.fetchAssetCollectionsWithType_subtype_options_(
type, subtype, fetchOptions)
albums = dict()
for index in range(result.count()):
# Get each PHAssetCollection object and save (key,value) = (title,identifier)
collection = result.objectAtIndex_(index)
if type == __SMART_ALBUM:
albums[__localized_smart_album_title(
collection.assetCollectionSubtype())] = str(
collection.localIdentifier())
else:
albums[str(collection.localizedTitle())] = str(
collection.localIdentifier())
# Return the dictionary with titles and identifiers
return albums
def __get_album_dates(album):
PHAsset = ObjCClass("PHAsset")
NSSortDescriptor = ObjCClass("NSSortDescriptor")
PHFetchOptions = ObjCClass("PHFetchOptions")
fetchOptions = PHFetchOptions.alloc().init().autorelease()
fetchOptions.sortDescriptors = [
NSSortDescriptor.sortDescriptorWithKey_ascending_(
"creationDate", True)
]
result = PHAsset.fetchAssetsInAssetCollection_options_(album, fetchOptions)
if result.count() != 0:
start_date = result.firstObject().creationDate()
end_date = result.lastObject().creationDate()
return (start_date, end_date)
else:
return (None, None)
