/**
* Helper just to avoid copy&paste'ing code.
*
* <p>Note: since this contains blocking Drive API calls, this will crash if you try to call it
* from the main thread, it can only be called from other threads.
*
* @return null if the folder can not be found.
*/
private DriveFolder checkOrCreateRemoteFolder(
GoogleApiClient googleApiClient, DriveFolder rootFolder, String folderName) {
// check for STORAGE permission
if (!canWriteToStorage()) return null;
Query query =
new Query.Builder()
.addFilter(
Filters.and(
Filters.eq(SearchableField.TITLE, folderName),
Filters.contains(SearchableField.MIME_TYPE, "folder")))
.build();
DriveApi.MetadataBufferResult result =
rootFolder.queryChildren(mGoogleApiClient, query).await();
if (!result.getStatus().isSuccess()) {
Log.e(
mActivity.getResources().getString(R.string.app_name),
"Cannot query folders in the root of Google Drive.");
return null;
} else {
for (Metadata m : result.getMetadataBuffer()) {
if (m.getTitle().equals(folderName)) {
// Folder exists - we found it!
DriveFolder folder = m.getDriveId().asDriveFolder();
result.getMetadataBuffer().release();
return folder;
}
}
}
result.getMetadataBuffer().release();
// Folder not found; let's create it.
MetadataChangeSet changeSet = new MetadataChangeSet.Builder().setTitle(folderName).build();
DriveFolder.DriveFolderResult result1 =
rootFolder.createFolder(googleApiClient, changeSet).await();
if (!result1.getStatus().isSuccess()) {
Log.e(
mActivity.getResources().getString(R.string.app_name),
"Error while trying to create the folder \"" + folderName + "\"");
return null;
}
return result1.getDriveFolder();
}
private void syncPhotosForTeam(GoogleApiClient googleApiClient, int teamNumber) {
if (mTeamNumber >= 0) {
Log.i(
mActivity.getResources().getString(R.string.app_name),
"Beginning photo sync for team " + teamNumber);
// get the list of local files
File photosDir = new File(mLocalTeamPhotosFilePath + "/" + teamNumber);
/** **** get the list of local files ***** */
// check if that folder exists
if (!photosDir.isDirectory()) {
// we have no photos for this team
if (mRequester != null) mRequester.updatePhotos(new Bitmap[0]);
googleApiClient.disconnect();
return;
}
File[] listOfFiles = photosDir.listFiles();
ArrayList<String> arrLocalFiles = new ArrayList<String>();
for (File file : listOfFiles) {
// make sure it's an image file
Bitmap bitmap = BitmapFactory.decodeFile(file.getPath());
if (bitmap != null) {
arrLocalFiles.add(file.getPath());
}
// else: if it's not a file, then what is it???? .... skip I guess
}
// Navigate to the correct folder - there has to be a more efficient way to do this
DriveFolder rootFolder =
Drive.DriveApi.getFolder(googleApiClient, mDriveIdTeamPhotosFolder);
Log.i(
mActivity.getResources().getString(R.string.app_name), "Local Files: " + arrLocalFiles);
Query query =
new Query.Builder()
.addFilter(Filters.eq(SearchableField.TITLE, "" + teamNumber))
.build();
DriveApi.MetadataBufferResult result =
rootFolder.queryChildren(googleApiClient, query).await();
DriveFolder teamPhotosFolder = null;
for (Metadata m : result.getMetadataBuffer()) {
teamPhotosFolder = m.getDriveId().asDriveFolder();
}
result.getMetadataBuffer().close();
ArrayList<PathAndDriveId> arrRemoteFiles = new ArrayList<PathAndDriveId>();
if (teamPhotosFolder != null) {
query =
new Query.Builder()
.addFilter(
Filters.eq(SearchableField.MIME_TYPE, "application/vnd.google-apps.photo"))
.build();
result = teamPhotosFolder.queryChildren(googleApiClient, query).await();
for (Metadata m : result.getMetadataBuffer()) {
arrRemoteFiles.add(
new PathAndDriveId(
mRemoteToplevelFolderName
+ "/"
+ mRemoteTeamFolderName
+ "/"
+ mRemoteTeamPhotosFolderName
+ "/"
+ mTeamNumber
+ "/"
+ m.getTitle(),
m.getDriveId(),
m.getTitle()));
}
result.getMetadataBuffer().close();
}
Log.i(
mActivity.getResources().getString(R.string.app_name),
"Remote Files: " + arrRemoteFiles);
// Remove files that are in both lists - these don't need to be synced.
for (PathAndDriveId remoteFile : arrRemoteFiles) {
String remotePath = remoteFile.path;
if (arrLocalFiles.contains(remotePath)) {
arrRemoteFiles.remove(remoteFile);
arrLocalFiles.remove(remotePath);
}
}
/** **** Download any Files we're missing locally ***** */
for (PathAndDriveId remoteFile : arrRemoteFiles) {
// the Drive API actually makes a local cache of the file, so let's copy the contents into
// our app's file structure
DriveApi.DriveContentsResult fileResult =
remoteFile
.driveId
.asDriveFile()
.open(googleApiClient, DriveFile.MODE_READ_ONLY, null)
.await();
if (!fileResult.getStatus().isSuccess()) {
// file can't be opened
continue;
}
String localFileToCreate =
mLocalTeamPhotosFilePath + "/" + teamNumber + "/" + remoteFile.title;
DriveContents contents = null;
InputStream in = null;
FileOutputStream fout = null;
try {
// DriveContents object contains pointers to the actual byte stream, which we will
// manually copy
contents = fileResult.getDriveContents();
in = contents.getInputStream();
fout = new FileOutputStream(localFileToCreate);
// read bytes from source file and write to destination file
byte[] b = new byte[1024];
int noOfBytes = 0;
while ((noOfBytes = in.read(b)) != -1) fout.write(b, 0, noOfBytes);
in.close();
fout.close();
contents.discard(googleApiClient);
} catch (FileNotFoundException e) {
// something went wrong, delete the file we were trying to create
(new File(localFileToCreate)).delete();
} catch (IOException e) {
// something went wrong, delete the file we were trying to create
(new File(localFileToCreate)).delete();
}
}
/** **** Upload any files that are missing remotely ***** */
for (String localFile : arrLocalFiles) {
// if the remote folder does not exist, create it. This should only need to be called
// once.
if (teamPhotosFolder == null) {
MetadataChangeSet changeSet =
new MetadataChangeSet.Builder().setTitle("" + teamNumber).build();
DriveFolder.DriveFolderResult folderResult =
rootFolder.createFolder(googleApiClient, changeSet).await();
teamPhotosFolder = folderResult.getDriveFolder();
}
DriveContents contents = null;
try {
FileInputStream in = new FileInputStream(localFile);
// create a new file in Drive. This works a little different than normal file IO it that
// you create the file first,
// then tell it at the end which folder it's part of. Think of "folders" in drive more
// like "tags" or "labels".
DriveApi.DriveContentsResult contentResult =
Drive.DriveApi.newDriveContents(googleApiClient).await();
contents = contentResult.getDriveContents();
OutputStream out = contents.getOutputStream();
// read bytes from source file and write to destination file
byte[] b = new byte[1024];
int noOfBytes = 0;
while ((noOfBytes = in.read(b)) != -1) out.write(b, 0, noOfBytes);
in.close();
out.close();
} catch (FileNotFoundException e) {
// something went wrong, discard the changes to the Drive file
if (contents != null) contents.discard(googleApiClient);
} catch (IOException e) {
// something went wrong, discard the changes to the Drive file
if (contents != null) contents.discard(googleApiClient);
}
if (contents != null) {
String[] splitFilename = localFile.split("/");
String filename = splitFilename[splitFilename.length - 1];
MetadataChangeSet changeSet =
new MetadataChangeSet.Builder()
.setTitle(filename)
.setMimeType(URLConnection.guessContentTypeFromName(filename))
.build();
teamPhotosFolder.createFile(googleApiClient, changeSet, contents).await();
}
}
Log.i(
mActivity.getResources().getString(R.string.app_name),
"Finished photo sync for team " + teamNumber);
googleApiClient.disconnect();
// hand the photos back to the PhotoRequester
if (mRequester != null) {
// first, get the list of image files
listOfFiles = photosDir.listFiles();
ArrayList<Bitmap> arrLocalBitmaps = new ArrayList<Bitmap>();
for (File file : listOfFiles) {
// make sure it's an image file
Bitmap bitmap = BitmapFactory.decodeFile(file.getPath());
if (bitmap != null) {
arrLocalBitmaps.add(bitmap);
}
// else: if it's not a file, then what is it???? .... skip I guess
}
Bitmap[] bitmaps = new Bitmap[arrLocalBitmaps.size()];
// TODO: commented out because it crashes the app with the error:
// "Only the original thread that created a view hierarchy can touch its views."
// This will need a re-jigging - maybe a loop in the PhotoRequester that checks for
// updates every
// few seconds and re-draws if there has been one.
// mRequester.updatePhotos(arrLocalBitmaps.toArray(bitmaps));
}
}
}