/*
* Depth first search for a parent that corresponds a local file
*/
private File pathToLocal(String remoteFileId, List<ParentReference> path) throws IOException {
List<ParentReference> pRefs = drive.parents().list(remoteFileId).execute().getItems();
for (ParentReference pRef : pRefs) {
if (pRef.getIsRoot()) {
return Configuration.getLocalRoot();
}
if (stub.storage().remoteToLocal().containsKey(pRef.getId())) {
return DriveUtils.absolutePath(stub.storage().remoteToLocal().get(pRef.getId()));
} else {
path.add(pRef);
File lookInside = pathToLocal(pRef.getId(), path);
if (null != lookInside) {
return lookInside;
} else {
path.remove(pRef);
}
}
}
return null;
}
@Override
public void init() throws IOException {
// Detect and store change number
long latestChange = changes(null);
if (latestChange != -1) stub.storage().put(StorageService.REMOTE_CHANGE, latestChange);
// Download files
stub.storage().put(StorageService.REMOTE_TO_LOCAL, new HashMap<String, String>());
stub.storage().put(StorageService.LOCAL_TO_REMOTE, new HashMap<String, String>());
String remoteRoot = Constants.FOLDER_ROOT;
java.io.File localRoot = Configuration.getLocalRoot();
if (!localRoot.exists()) {
localRoot.mkdirs();
}
String localRelative = DriveUtils.relativePath(localRoot);
stub.storage().remoteToLocal().put(remoteRoot, localRelative);
stub.storage().localToRemote().put(localRelative, remoteRoot);
for (ChildReference childref : drive.children().list(remoteRoot).execute().getItems()) {
stub.transmit().download(childref.getId(), localRoot);
}
stub.storage().put(StorageService.SNAPSHOT, stub.snapshot().make());
}