private static String folderContains(String filename, String folderID) {
// Returns the ID of a specified filename in a folder or null if it does not exist
File child = null;
ChildList children = null;
try {
children = service.children().list(folderID).execute();
for (ChildReference element : children.getItems()) {
child = service.files().get(element.getId()).execute();
if (child.getTitle().equals(filename)) {
break;
}
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
// System.out.println("children: "+children.toPrettyString());
// System.out.println("child: "+child.toPrettyString());
}
if (child != null && child.getTitle().equals(filename)) {
return child.getId();
}
return null;
}
/**
* Insert new Google Drive files in the local database.
*
* @param driveFiles Collection of Google Drive files to insert.
*/
private void insertNewDriveFiles(Collection<File> driveFiles) {
Uri uri = getNotesUri(mAccount.name);
Log.d(TAG, "Inserting new Drive files: " + driveFiles.size());
for (File driveFile : driveFiles) {
if (driveFile != null) {
ContentValues values = new ContentValues();
values.put(NotePad.Notes.COLUMN_NAME_ACCOUNT, mAccount.name);
values.put(NotePad.Notes.COLUMN_NAME_FILE_ID, driveFile.getId());
values.put(NotePad.Notes.COLUMN_NAME_TITLE, driveFile.getTitle());
values.put(NotePad.Notes.COLUMN_NAME_NOTE, getFileContent(driveFile));
values.put(NotePad.Notes.COLUMN_NAME_CREATE_DATE, driveFile.getCreatedDate().getValue());
values.put(
NotePad.Notes.COLUMN_NAME_MODIFICATION_DATE, driveFile.getModifiedDate().getValue());
try {
mProvider.insert(uri, values);
} catch (RemoteException e) {
e.printStackTrace();
}
}
}
mContext.getContentResolver().notifyChange(uri, null, false);
}
private static String determineParent(String email, String workflow) {
String root = "0B7Jfx3RRVE5YenZEY1N5cE5pRms";
String parentFolder = null;
String level = root;
String parent = root;
boolean lowest = false;
// Checks for user
level = folderContains(email, level);
if (level != null) {
DateFormat today = new SimpleDateFormat("E, MM/dd/yyyy");
Date now = new Date();
String nowStr = today.format(now);
// Checks for today's date
parent = level;
level = folderContains(nowStr, level);
if (level != null) {
// Checks for a workflowID folder
parent = level;
level = folderContains(workflow, level);
// System.out.println("level: "+level);
if (level != null) {
// Finds the highest folder number; add 1 and creates it.
try {
File child = null;
int lastRun = 0;
int tmp = lastRun;
ChildList children = service.children().list(level).execute();
for (ChildReference element : children.getItems()) {
child = service.files().get(element.getId()).execute();
try {
tmp = Integer.parseInt(child.getTitle());
if (tmp > lastRun) {
lastRun = tmp;
}
} catch (NumberFormatException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
lastRun += 1;
String next = new Integer(lastRun).toString();
// System.out.println("level: "+level);
// System.out.println("next: "+next);
parentFolder = createFolderWithParentAndTitle(level, next);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
lowest = true;
}
} else {
parentFolder = createFolderWithParentAndTitle(parent, workflow);
}
} else {
parentFolder = createFolderWithParentAndTitle(parent, nowStr);
}
} else {
parentFolder = createFolderWithParentAndTitle(parent, email);
}
try {
File file = service.files().get(parentFolder).execute();
service.permissions().insert(file.getId(), perm).execute();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (!lowest) parentFolder = determineParent(email, workflow);
return parentFolder;
}
/**
* Merge a local file with a Google Drive File.
*
* <p>The last modification is used to check which file to sync from. Then, the md5 checksum of
* the file is used to check whether or not the file's content should be sync'ed.
*
* @param localFileUri Local file URI to save local changes against.
* @param localFile Local file cursor to retrieve data from.
* @param driveFile Google Drive file.
*/
private void mergeFiles(Uri localFileUri, Cursor localFile, File driveFile) {
long localFileModificationDate = localFile.getLong(COLUMN_INDEX_MODIFICATION_DATE);
Log.d(
TAG,
"Modification dates: "
+ localFileModificationDate
+ " - "
+ driveFile.getModifiedDate().getValue());
if (localFileModificationDate > driveFile.getModifiedDate().getValue()) {
try {
if (localFile.getShort(COLUMN_INDEX_DELETED) != 0) {
Log.d(TAG, " > Deleting Drive file.");
mService.files().delete(driveFile.getId()).execute();
mProvider.delete(localFileUri, null, null);
} else {
String localNote = localFile.getString(COLUMN_INDEX_NOTE);
File updatedFile = null;
// Update drive file.
Log.d(TAG, " > Updating Drive file.");
driveFile.setTitle(localFile.getString(COLUMN_INDEX_TITLE));
if (md5(localNote) != driveFile.getMd5Checksum()) {
// Update both content and metadata.
ByteArrayContent content = ByteArrayContent.fromString(TEXT_PLAIN, localNote);
updatedFile = mService.files().update(driveFile.getId(), driveFile, content).execute();
} else {
// Only update the metadata.
updatedFile = mService.files().update(driveFile.getId(), driveFile).execute();
}
ContentValues values = new ContentValues();
values.put(
NotePad.Notes.COLUMN_NAME_MODIFICATION_DATE,
updatedFile.getModifiedDate().getValue());
mProvider.update(localFileUri, values, null, null);
}
} catch (IOException e) {
e.printStackTrace();
} catch (RemoteException e) {
e.printStackTrace();
}
} else if (localFileModificationDate < driveFile.getModifiedDate().getValue()) {
// Update local file.
Log.d(TAG, " > Updating local file.");
ContentValues values = new ContentValues();
values.put(NotePad.Notes.COLUMN_NAME_TITLE, driveFile.getTitle());
values.put(
NotePad.Notes.COLUMN_NAME_MODIFICATION_DATE, driveFile.getModifiedDate().getValue());
// Only download the content if it has changed.
if (md5(localFile.getString(COLUMN_INDEX_NOTE)) != driveFile.getMd5Checksum()) {
values.put(NotePad.Notes.COLUMN_NAME_NOTE, getFileContent(driveFile));
}
try {
mProvider.update(localFileUri, values, null, null);
} catch (RemoteException e) {
e.printStackTrace();
}
}
}
private void synchronize(ChangeRecord record) throws IOException {
try {
switch (record.getOperation()) {
case LOCAL_INSERT:
{
// Get remote id for the parent folder
File local = DriveUtils.absolutePath(record.getLocalFile());
String remoteParent =
stub.storage().localToRemote().get(DriveUtils.relativePath(local.getParentFile()));
if (!StringUtils.isEmpty(remoteParent)
&& !stub.storage().localToRemote().containsKey(record.getLocalFile())) {
// Ignore insert request that doesn't have a parent or
// already have a mapping.
// The insert operation will be accomplished by the topmost
// folder
String remoteId = stub.transmit().upload(remoteParent, local);
record.setRemoteFileId(remoteId);
}
break;
}
case LOCAL_DELETE:
{
if (!StringUtils.isEmpty(record.getRemoteFileId())) {
stub.transmit().delete(record.getRemoteFileId());
} else {
logger.warn(
"Local deletion has no remote reference, make sure the storage is correct.");
}
break;
}
case LOCAL_CHANGE:
{
if (!StringUtils.isEmpty(record.getRemoteFileId())) {
File local = DriveUtils.absolutePath(record.getLocalFile());
stub.transmit().update(record.getRemoteFileId(), local);
} else {
logger.warn(
"Local change has no remote reference, make sure the storage is correct.");
logger.warn("Trying to insert the new record");
// Modify it to a local insert
record.setOperation(Operation.LOCAL_INSERT);
synchronize(record);
}
break;
}
case LOCAL_RENAME:
{
if (!StringUtils.isEmpty(record.getRemoteFileId())) {
stub.transmit().rename(record.getRemoteFileId(), (String) record.getContext()[0]);
} else {
logger.warn(
"Local rename has no remote reference, make sure the storage is correct.");
logger.warn("Trying to insert the new record");
// Modify it to be a local insert
record.setOperation(Operation.LOCAL_INSERT);
synchronize(record);
}
break;
}
case REMOTE_INSERT:
{
if (stub.storage().remoteToLocal().containsKey(record.getRemoteFileId())) {
// This file/folder already had been created
break;
}
com.google.api.services.drive.model.File file = record.getContext(0);
// Depth search of parent that has a local root
List<ParentReference> path = new ArrayList<ParentReference>();
File local = pathToLocal(record.getRemoteFileId(), path);
if (null == local) {
// Check whether this file is trashed
if (file.getLabels().getTrashed()) {
return;
}
if (file.getShared()) {
return;
} else {
throw new IllegalArgumentException("Non-trash file has no known parent");
}
}
File parent = local;
for (ParentReference node : path) {
stub.transmit().download(node.getId(), parent);
parent = DriveUtils.absolutePath(stub.storage().remoteToLocal().get(node.getId()));
}
stub.transmit().download(record.getRemoteFileId(), parent);
record.setLocalFile(stub.storage().remoteToLocal().get(record.getRemoteFileId()));
if (StringUtils.isEmpty(record.getLocalFile())) {
break;
}
break;
}
case REMOTE_DELETE:
{
if (StringUtils.isEmpty(record.getLocalFile())) {
// No local file, remote file should be a trashed one.
if (logger.isDebugEnabled()) {
logger.debug(
"No corresponding local file for deletion. Remote file may be trashed");
}
break;
}
File localFile = DriveUtils.absolutePath(record.getLocalFile());
String localParent = DriveUtils.relativePath(localFile.getParentFile());
// Preserve the original context
record.setContext(new Object[] {record.getContext(0), localParent});
deleteLocalFile(localFile);
if (localFile.exists()) {
if (logger.isDebugEnabled()) {
logger.debug(
MessageFormat.format(
"Failed to delete file {0}. File may have been deleted.",
record.getLocalFile()));
}
}
stub.storage().localToRemote().remove(record.getLocalFile());
stub.storage().remoteToLocal().remove(record.getRemoteFileId());
break;
}
case REMOTE_CHANGE:
{
File local = DriveUtils.absolutePath(record.getLocalFile());
File localParent = local.getParentFile();
com.google.api.services.drive.model.File remote = record.getContext(0);
if (!remote.getTitle().equals(local.getName())) {
local.delete();
stub.storage().localToRemote().remove(record.getLocalFile());
stub.storage().remoteToLocal().remove(record.getRemoteFileId());
}
stub.transmit().download(record.getRemoteFileId(), localParent);
break;
}
case REMOTE_RENAME:
{
File local = DriveUtils.absolutePath(record.getLocalFile());
com.google.api.services.drive.model.File remote = record.getContext(0);
String remoteName = remote.getTitle();
File newName =
new File(local.getParentFile().getAbsolutePath() + File.separator + remoteName);
String relNewName = DriveUtils.relativePath(newName);
record.setContext(new Object[] {record.getContext()[0], relNewName});
local.renameTo(newName);
stub.storage()
.remoteToLocal()
.put(record.getRemoteFileId(), DriveUtils.relativePath(newName));
stub.storage().localToRemote().remove(DriveUtils.relativePath(local));
stub.storage()
.localToRemote()
.put(DriveUtils.relativePath(newName), record.getRemoteFileId());
break;
}
}
} catch (Exception e) {
logger.warn(MessageFormat.format("Exception on Change {0}. Retry later", record), e);
FailedRecord fr = new FailedRecord(record);
if (e instanceof GoogleJsonResponseException) {
GoogleJsonResponseException gjre = (GoogleJsonResponseException) e;
fr.setError(String.valueOf(gjre.getDetails().getCode()));
} else {
fr.setError(e.getMessage());
}
stub.storage().failedLog().add(fr);
}
}
private void syncNotes(final String syncAccountName, final String accessToken) {
final Drive drive = getDriveService(syncAccountName, accessToken);
ContentResolver cr = getContentResolver();
try {
// loop over saved files and add any new notes to drive
Cursor savedNotes =
cr.query(NotesProvider.CONTENT_URI, NotesSyncQuery.PROJECTION, null, null, null);
if (savedNotes.moveToFirst()) {
do {
final String driveId = savedNotes.getString(NotesSyncQuery.DRIVE_ID);
if (TextUtils.isEmpty(driveId)) {
// exists locally but not in drive Ð upload it
File newNote = new File();
newNote.setTitle(savedNotes.getString(NotesSyncQuery.TITLE));
newNote.setMimeType(NOTE_MIME_TYPE);
File inserted =
drive
.files()
.insert(
newNote,
ByteArrayContent.fromString(
NOTE_MIME_TYPE, savedNotes.getString(NotesSyncQuery.BODY)))
.execute();
// save the drive id to the db
ContentValues cv = new ContentValues();
cv.put(NotesProvider.KEY_DRIVE_ID, inserted.getId());
Uri noteUri =
ContentUris.withAppendedId(
NotesProvider.CONTENT_URI, savedNotes.getLong(NotesSyncQuery.ID));
cr.update(noteUri, cv, null, null);
} else {
// TODO compare timestamps etc.
}
} while (savedNotes.moveToNext());
}
// loop over all files in drive and see if any need to be
// synced locally
FileList driveFilesList = drive.files().list().execute();
for (File remote : driveFilesList.getItems()) {
if (remote.getLabels().getTrashed()) {
// skip deleted files
continue;
}
final String where = NotesProvider.KEY_DRIVE_ID + "=?";
final String[] arguments = new String[] {remote.getId()};
Cursor c =
cr.query(
NotesProvider.CONTENT_URI, NotesDownloadQuery.PROJECTION, where, arguments, null);
if (c.getCount() == 0) {
// exists in drive but not locally Ð download it
final String title = remote.getTitle();
final String body = getFileContents(drive, remote.getDownloadUrl());
final ContentValues cv = new ContentValues();
cv.put(NotesProvider.KEY_TITLE, title);
cv.put(NotesProvider.KEY_BODY, body);
cv.put(NotesProvider.KEY_DRIVE_ID, remote.getId());
cv.put(NotesProvider.KEY_LAST_MODIFIED, remote.getModifiedDate().getValue());
cr.insert(NotesProvider.CONTENT_URI, cv);
} else {
// TODO compare timestamps etc.
}
}
} catch (IOException e) {
// FIXME error handling
Log.e(getClass().getSimpleName(), "Drive esplode", e);
}
}