/**
* Retrieve a collection of files that have changed since the provided {@code changeId}.
*
* @param changeId Change ID to retrieve changed files from.
* @return Map of changed files key'ed by their file ID.
*/
private Map<String, File> getChangedFiles(long changeId) {
Map<String, File> result = new HashMap<String, File>();
try {
Changes.List request = mService.changes().list().setStartChangeId(changeId);
do {
ChangeList changes = request.execute();
long largestChangeId = changes.getLargestChangeId().longValue();
for (Change change : changes.getItems()) {
if (change.getDeleted()) {
result.put(change.getFileId(), null);
} else if (TEXT_PLAIN.equals(change.getFile().getMimeType())) {
result.put(change.getFileId(), change.getFile());
}
}
if (largestChangeId > mLargestChangeId) {
mLargestChangeId = largestChangeId;
}
request.setPageToken(changes.getNextPageToken());
} while (request.getPageToken() != null && request.getPageToken().length() > 0);
} catch (IOException e) {
e.printStackTrace();
}
Log.d(TAG, "Got changed Drive files: " + result.size() + " - " + mLargestChangeId);
return result;
}
private List<ChangeRecord> remoteChange() throws IOException {
List<Change> changes = new ArrayList<Change>();
long lastChange = changes(changes);
stub.storage().put(StorageService.REMOTE_CHANGE, lastChange);
List<ChangeRecord> records = new ArrayList<ChangeRecord>();
for (Change remoteChange : changes) {
String local = stub.storage().remoteToLocal().get(remoteChange.getFileId());
if (remoteChange.getDeleted()) {
records.add(
new ChangeRecord(
Operation.REMOTE_DELETE, local, remoteChange.getFileId(), remoteChange.getFile()));
} else if (remoteChange.getFile().getLabels().getTrashed()) {
records.add(
new ChangeRecord(
Operation.REMOTE_DELETE, local, remoteChange.getFileId(), remoteChange.getFile()));
} else if (StringUtils.isEmpty(local)) {
// Cannot find this file, should be new
records.add(
new ChangeRecord(
Operation.REMOTE_INSERT, null, remoteChange.getFileId(), remoteChange.getFile()));
} else {
if (!DriveUtils.isDirectory(remoteChange.getFile())
&& !DriveUtils.isGoogleDoc(remoteChange.getFile())) {
String remoteName = remoteChange.getFile().getTitle();
String remoteMd5 = remoteChange.getFile().getMd5Checksum();
File localFile = DriveUtils.absolutePath(local);
if (localFile.isFile()) {
String localMd5 = DriveUtils.md5Checksum(localFile);
if (localMd5.equals(remoteMd5)) {
// Sometimes google drive will record change even if
// the name and MD5 are exactly the same
if (!remoteName.equals(localFile.getName())) {
records.add(
new ChangeRecord(
Operation.REMOTE_RENAME,
local,
remoteChange.getFileId(),
remoteChange.getFile()));
}
} else {
records.add(
new ChangeRecord(
Operation.REMOTE_CHANGE,
local,
remoteChange.getFileId(),
remoteChange.getFile()));
}
} else {
records.add(
new ChangeRecord(
Operation.REMOTE_INSERT,
null,
remoteChange.getFileId(),
remoteChange.getFile()));
}
} else {
// For directory just check the name change
String remoteName = remoteChange.getFile().getTitle();
String localName = DriveUtils.absolutePath(local).getName();
if (!remoteName.equals(localName)) {
records.add(
new ChangeRecord(
Operation.REMOTE_RENAME,
local,
remoteChange.getFileId(),
remoteChange.getFile()));
}
}
}
}
return records;
}