src/com/owncloud/android/operations/SynchronizeFolderOperation.java

   1 /**
   2  *   ownCloud Android client application
   3  *
   4  *   @author David A. Velasco
   5  *   Copyright (C) 2015 ownCloud Inc.
   6  *
   7  *   This program is free software: you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License version 2,
   9  *   as published by the Free Software Foundation.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 package com.owncloud.android.operations;
  22
  23 import android.accounts.Account;
  24 import android.content.Context;
  25 import android.content.Intent;
  26 import android.util.Log;
  27
  28 import com.owncloud.android.MainApp;
  29 import com.owncloud.android.datamodel.FileDataStorageManager;
  30 import com.owncloud.android.datamodel.OCFile;
  31 import com.owncloud.android.files.services.FileDownloader;
  32 import com.owncloud.android.lib.common.OwnCloudClient;
  33 import com.owncloud.android.lib.common.operations.OperationCancelledException;
  34 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  35 import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
  36 import com.owncloud.android.lib.common.utils.Log_OC;
  37 import com.owncloud.android.lib.resources.files.ReadRemoteFileOperation;
  38 import com.owncloud.android.lib.resources.files.ReadRemoteFolderOperation;
  39 import com.owncloud.android.lib.resources.files.RemoteFile;
  40 import com.owncloud.android.operations.common.SyncOperation;
  41 import com.owncloud.android.services.OperationsService;
  42 import com.owncloud.android.utils.FileStorageUtils;
  43
  44 import java.io.File;
  45 import java.util.ArrayList;
  46 import java.util.HashMap;
  47 import java.util.List;
  48 import java.util.Map;
  49 import java.util.Vector;
  50 import java.util.concurrent.atomic.AtomicBoolean;
  51
  52 //import android.support.v4.content.LocalBroadcastManager;
  53
  54
  55 /**
  56  *  Remote operation performing the synchronization of the list of files contained
  57  *  in a folder identified with its remote path.
  58  *
  59  *  Fetches the list and properties of the files contained in the given folder, including their
  60  *  properties, and updates the local database with them.
  61  *
  62  *  Does NOT enter in the child folders to synchronize their contents also.
  63  */
  64 public class SynchronizeFolderOperation extends SyncOperation {
  65
  66     private static final String TAG = SynchronizeFolderOperation.class.getSimpleName();
  67
  68     /** Time stamp for the synchronization process in progress */
  69     private long mCurrentSyncTime;
  70
  71     /** Remote path of the folder to synchronize */
  72     private String mRemotePath;
  73
  74     /** Account where the file to synchronize belongs */
  75     private Account mAccount;
  76
  77     /** Android context; necessary to send requests to the download service */
  78     private Context mContext;
  79
  80     /** Locally cached information about folder to synchronize */
  81     private OCFile mLocalFolder;
  82
  83     /** Files and folders contained in the synchronized folder after a successful operation */
  84     //private List<OCFile> mChildren;
  85
  86     /** Counter of conflicts found between local and remote files */
  87     private int mConflictsFound;
  88
  89     /** Counter of failed operations in synchronization of kept-in-sync files */
  90     private int mFailsInFileSyncsFound;
  91
  92     /** 'True' means that the remote folder changed and should be fetched */
  93     private boolean mRemoteFolderChanged;
  94
  95     private List<OCFile> mFilesForDirectDownload;
  96         // to avoid extra PROPFINDs when there was no change in the folder
  97
  98     private List<SyncOperation> mFilesToSyncContentsWithoutUpload;
  99         // this will go out when 'folder synchronization' replaces 'folder download'; step by step
 100
 101     private List<SyncOperation> mFavouriteFilesToSyncContents;
 102         // this will be used for every file when 'folder synchronization' replaces 'folder download'
 103
 104     private final AtomicBoolean mCancellationRequested;
 105
 106     /**
 107      * Creates a new instance of {@link SynchronizeFolderOperation}.
 108      *
 109      * @param   context                 Application context.
 110      * @param   remotePath              Path to synchronize.
 111      * @param   account                 ownCloud account where the folder is located.
 112      * @param   currentSyncTime         Time stamp for the synchronization process in progress.
 113      */
 114     public SynchronizeFolderOperation(Context context, String remotePath, Account account,
 115                                       long currentSyncTime){
 116         mRemotePath = remotePath;
 117         mCurrentSyncTime = currentSyncTime;
 118         mAccount = account;
 119         mContext = context;
 120         mRemoteFolderChanged = false;
 121         mFilesForDirectDownload = new Vector<OCFile>();
 122         mFilesToSyncContentsWithoutUpload = new Vector<SyncOperation>();
 123         mFavouriteFilesToSyncContents = new Vector<SyncOperation>();
 124         mCancellationRequested = new AtomicBoolean(false);
 125     }
 126
 127
 128     public int getConflictsFound() {
 129         return mConflictsFound;
 130     }
 131
 132     public int getFailsInFileSyncsFound() {
 133         return mFailsInFileSyncsFound;
 134     }
 135
 136     /**
 137      * Performs the synchronization.
 138      *
 139      * {@inheritDoc}
 140      */
 141     @Override
 142     protected RemoteOperationResult run(OwnCloudClient client) {
 143         RemoteOperationResult result = null;
 144         mFailsInFileSyncsFound = 0;
 145         mConflictsFound = 0;
 146
 147         try {
 148             // get locally cached information about folder
 149             mLocalFolder = getStorageManager().getFileByPath(mRemotePath);
 150
 151             result = checkForChanges(client);
 152
 153             if (result.isSuccess()) {
 154                 if (mRemoteFolderChanged) {
 155                     result = fetchAndSyncRemoteFolder(client);
 156
 157                 } else {
 158                     prepareOpsFromLocalKnowledge();
 159                 }
 160
 161                 if (result.isSuccess()) {
 162                     syncContents(client);
 163                 }
 164
 165             }
 166
 167             if (mCancellationRequested.get()) {
 168                 throw new OperationCancelledException();
 169             }
 170
 171         } catch (OperationCancelledException e) {
 172             result = new RemoteOperationResult(e);
 173         }
 174
 175         return result;
 176
 177     }
 178
 179     private RemoteOperationResult checkForChanges(OwnCloudClient client)
 180             throws OperationCancelledException {
 181         Log_OC.d(TAG, "Checking changes in " + mAccount.name + mRemotePath);
 182
 183         mRemoteFolderChanged = true;
 184         RemoteOperationResult result = null;
 185
 186         if (mCancellationRequested.get()) {
 187             throw new OperationCancelledException();
 188         }
 189
 190         // remote request
 191         ReadRemoteFileOperation operation = new ReadRemoteFileOperation(mRemotePath);
 192         result = operation.execute(client);
 193         if (result.isSuccess()){
 194             OCFile remoteFolder = FileStorageUtils.fillOCFile((RemoteFile) result.getData().get(0));
 195
 196             // check if remote and local folder are different
 197             mRemoteFolderChanged =
 198                         !(remoteFolder.getEtag().equalsIgnoreCase(mLocalFolder.getEtag()));
 199
 200             result = new RemoteOperationResult(ResultCode.OK);
 201
 202             Log_OC.i(TAG, "Checked " + mAccount.name + mRemotePath + " : " +
 203                     (mRemoteFolderChanged ? "changed" : "not changed"));
 204
 205         } else {
 206             // check failed
 207             if (result.getCode() == ResultCode.FILE_NOT_FOUND) {
 208                 removeLocalFolder();
 209             }
 210             if (result.isException()) {
 211                 Log_OC.e(TAG, "Checked " + mAccount.name + mRemotePath  + " : " +
 212                         result.getLogMessage(), result.getException());
 213             } else {
 214                 Log_OC.e(TAG, "Checked " + mAccount.name + mRemotePath + " : " +
 215                         result.getLogMessage());
 216             }
 217
 218         }
 219
 220         return result;
 221     }
 222
 223
 224     private RemoteOperationResult fetchAndSyncRemoteFolder(OwnCloudClient client)
 225             throws OperationCancelledException {
 226         if (mCancellationRequested.get()) {
 227             throw new OperationCancelledException();
 228         }
 229
 230         ReadRemoteFolderOperation operation = new ReadRemoteFolderOperation(mRemotePath);
 231         RemoteOperationResult result = operation.execute(client);
 232         Log_OC.d(TAG, "Synchronizing " + mAccount.name + mRemotePath);
 233
 234         if (result.isSuccess()) {
 235             synchronizeData(result.getData(), client);
 236             if (mConflictsFound > 0  || mFailsInFileSyncsFound > 0) {
 237                 result = new RemoteOperationResult(ResultCode.SYNC_CONFLICT);
 238                     // should be a different result code, but will do the job
 239             }
 240         } else {
 241             if (result.getCode() == ResultCode.FILE_NOT_FOUND)
 242                 removeLocalFolder();
 243         }
 244
 245
 246         return result;
 247     }
 248
 249
 250     private void removeLocalFolder() {
 251         FileDataStorageManager storageManager = getStorageManager();
 252         if (storageManager.fileExists(mLocalFolder.getFileId())) {
 253             String currentSavePath = FileStorageUtils.getSavePath(mAccount.name);
 254             storageManager.removeFolder(
 255                     mLocalFolder,
 256                     true,
 257                     (   mLocalFolder.isDown() &&        // TODO: debug, I think this is
 258                                                         // always false for folders
 259                             mLocalFolder.getStoragePath().startsWith(currentSavePath)
 260                     )
 261             );
 262         }
 263     }
 264
 265
 266     /**
 267      *  Synchronizes the data retrieved from the server about the contents of the target folder
 268      *  with the current data in the local database.
 269      *
 270      *  Grants that mChildren is updated with fresh data after execution.
 271      *
 272      *  @param folderAndFiles   Remote folder and children files in Folder
 273      *
 274      *  @param client           Client instance to the remote server where the data were
 275      *                          retrieved.
 276      *  @return                 'True' when any change was made in the local data, 'false' otherwise
 277      */
 278     private void synchronizeData(ArrayList<Object> folderAndFiles, OwnCloudClient client)
 279             throws OperationCancelledException {
 280         FileDataStorageManager storageManager = getStorageManager();
 281
 282         // parse data from remote folder
 283         OCFile remoteFolder = fillOCFile((RemoteFile)folderAndFiles.get(0));
 284         remoteFolder.setParentId(mLocalFolder.getParentId());
 285         remoteFolder.setFileId(mLocalFolder.getFileId());
 286
 287         Log_OC.d(TAG, "Remote folder " + mLocalFolder.getRemotePath()
 288                 + " changed - starting update of local data ");
 289
 290         List<OCFile> updatedFiles = new Vector<OCFile>(folderAndFiles.size() - 1);
 291         mFilesForDirectDownload.clear();
 292         mFilesToSyncContentsWithoutUpload.clear();
 293         mFavouriteFilesToSyncContents.clear();
 294
 295         if (mCancellationRequested.get()) {
 296             throw new OperationCancelledException();
 297         }
 298
 299         // get current data about local contents of the folder to synchronize
 300         List<OCFile> localFiles = storageManager.getFolderContent(mLocalFolder);
 301         Map<String, OCFile> localFilesMap = new HashMap<String, OCFile>(localFiles.size());
 302         for (OCFile file : localFiles) {
 303             localFilesMap.put(file.getRemotePath(), file);
 304         }
 305
 306         // loop to synchronize every child
 307         OCFile remoteFile = null, localFile = null;
 308         for (int i=1; i<folderAndFiles.size(); i++) {
 309             /// new OCFile instance with the data from the server
 310             remoteFile = fillOCFile((RemoteFile)folderAndFiles.get(i));
 311             remoteFile.setParentId(mLocalFolder.getFileId());
 312
 313             /// retrieve local data for the read file
 314             //  localFile = mStorageManager.getFileByPath(remoteFile.getRemotePath());
 315             localFile = localFilesMap.remove(remoteFile.getRemotePath());
 316
 317             /// add to the remoteFile (the new one) data about LOCAL STATE (not existing in server)
 318             remoteFile.setLastSyncDateForProperties(mCurrentSyncTime);
 319             if (localFile != null) {
 320                 // some properties of local state are kept unmodified
 321                 remoteFile.setFileId(localFile.getFileId());
 322                 remoteFile.setKeepInSync(localFile.keepInSync());
 323                 remoteFile.setLastSyncDateForData(localFile.getLastSyncDateForData());
 324                 remoteFile.setModificationTimestampAtLastSyncForData(
 325                         localFile.getModificationTimestampAtLastSyncForData()
 326                 );
 327                 remoteFile.setStoragePath(localFile.getStoragePath());
 328                 // eTag will not be updated unless contents are synchronized
 329                 //  (Synchronize[File|Folder]Operation with remoteFile as parameter)
 330                 remoteFile.setEtag(localFile.getEtag());
 331                 if (remoteFile.isFolder()) {
 332                     remoteFile.setFileLength(localFile.getFileLength());
 333                         // TODO move operations about size of folders to FileContentProvider
 334                 } else if (mRemoteFolderChanged && remoteFile.isImage() &&
 335                         remoteFile.getModificationTimestamp() !=
 336                                 localFile.getModificationTimestamp()) {
 337                     remoteFile.setNeedsUpdateThumbnail(true);
 338                     Log.d(TAG, "Image " + remoteFile.getFileName() + " updated on the server");
 339                 }
 340                 remoteFile.setPublicLink(localFile.getPublicLink());
 341                 remoteFile.setShareByLink(localFile.isShareByLink());
 342             } else {
 343                 // remote eTag will not be updated unless contents are synchronized
 344                 //  (Synchronize[File|Folder]Operation with remoteFile as parameter)
 345                 remoteFile.setEtag("");
 346             }
 347
 348             /// check and fix, if needed, local storage path
 349             searchForLocalFileInDefaultPath(remoteFile);
 350
 351             /// classify file to sync/download contents later
 352             if (remoteFile.isFolder()) {
 353                 /// to download children files recursively
 354                 synchronized(mCancellationRequested) {
 355                     if (mCancellationRequested.get()) {
 356                         throw new OperationCancelledException();
 357                     }
 358                     startSyncFolderOperation(remoteFile.getRemotePath());
 359                 }
 360
 361             } else if (remoteFile.keepInSync()) {
 362                 /// prepare content synchronization for kept-in-sync files
 363                 SynchronizeFileOperation operation = new SynchronizeFileOperation(
 364                         localFile,
 365                         remoteFile,
 366                         mAccount,
 367                         true,
 368                         mContext
 369                     );
 370                 mFavouriteFilesToSyncContents.add(operation);
 371
 372             } else {
 373                 /// prepare limited synchronization for regular files
 374                 SynchronizeFileOperation operation = new SynchronizeFileOperation(
 375                         localFile,
 376                         remoteFile,
 377                         mAccount,
 378                         true,
 379                         false,
 380                         mContext
 381                     );
 382                 mFilesToSyncContentsWithoutUpload.add(operation);
 383             }
 384
 385             updatedFiles.add(remoteFile);
 386         }
 387
 388         // save updated contents in local database
 389         storageManager.saveFolder(remoteFolder, updatedFiles, localFilesMap.values());
 390
 391     }
 392
 393
 394     private void prepareOpsFromLocalKnowledge() throws OperationCancelledException {
 395         List<OCFile> children = getStorageManager().getFolderContent(mLocalFolder);
 396         for (OCFile child : children) {
 397             /// classify file to sync/download contents later
 398             if (child.isFolder()) {
 399                 /// to download children files recursively
 400                 synchronized(mCancellationRequested) {
 401                     if (mCancellationRequested.get()) {
 402                         throw new OperationCancelledException();
 403                     }
 404                     startSyncFolderOperation(child.getRemotePath());
 405                 }
 406
 407             } else {
 408                 /// prepare limited synchronization for regular files
 409                 if (!child.isDown()) {
 410                     mFilesForDirectDownload.add(child);
 411                 }
 412             }
 413         }
 414     }
 415
 416
 417     private void syncContents(OwnCloudClient client) throws OperationCancelledException {
 418         startDirectDownloads();
 419         startContentSynchronizations(mFilesToSyncContentsWithoutUpload, client);
 420         startContentSynchronizations(mFavouriteFilesToSyncContents, client);
 421     }
 422
 423
 424     private void startDirectDownloads() throws OperationCancelledException {
 425         for (OCFile file : mFilesForDirectDownload) {
 426             synchronized(mCancellationRequested) {
 427                 if (mCancellationRequested.get()) {
 428                     throw new OperationCancelledException();
 429                 }
 430                 Intent i = new Intent(mContext, FileDownloader.class);
 431                 i.putExtra(FileDownloader.EXTRA_ACCOUNT, mAccount);
 432                 i.putExtra(FileDownloader.EXTRA_FILE, file);
 433                 mContext.startService(i);
 434             }
 435         }
 436     }
 437
 438     /**
 439      * Performs a list of synchronization operations, determining if a download or upload is needed
 440      * or if exists conflict due to changes both in local and remote contents of the each file.
 441      *
 442      * If download or upload is needed, request the operation to the corresponding service and goes
 443      * on.
 444      *
 445      * @param filesToSyncContents       Synchronization operations to execute.
 446      * @param client                    Interface to the remote ownCloud server.
 447      */
 448     private void startContentSynchronizations(List<SyncOperation> filesToSyncContents,
 449                                               OwnCloudClient client)
 450             throws OperationCancelledException {
 451
 452         Log_OC.v(TAG, "Starting content synchronization... ");
 453         RemoteOperationResult contentsResult = null;
 454         for (SyncOperation op: filesToSyncContents) {
 455             if (mCancellationRequested.get()) {
 456                 throw new OperationCancelledException();
 457             }
 458             contentsResult = op.execute(getStorageManager(), mContext);
 459             if (!contentsResult.isSuccess()) {
 460                 if (contentsResult.getCode() == ResultCode.SYNC_CONFLICT) {
 461                     mConflictsFound++;
 462                 } else {
 463                     mFailsInFileSyncsFound++;
 464                     if (contentsResult.getException() != null) {
 465                         Log_OC.e(TAG, "Error while synchronizing file : "
 466                                 +  contentsResult.getLogMessage(), contentsResult.getException());
 467                     } else {
 468                         Log_OC.e(TAG, "Error while synchronizing file : "
 469                                 + contentsResult.getLogMessage());
 470                     }
 471                 }
 472                 // TODO - use the errors count in notifications
 473             }   // won't let these fails break the synchronization process
 474         }
 475     }
 476
 477
 478     /**
 479      * Creates and populates a new {@link com.owncloud.android.datamodel.OCFile}
 480      * object with the data read from the server.
 481      *
 482      * @param remote    remote file read from the server (remote file or folder).
 483      * @return          New OCFile instance representing the remote resource described by we.
 484      */
 485     private OCFile fillOCFile(RemoteFile remote) {
 486         OCFile file = new OCFile(remote.getRemotePath());
 487         file.setCreationTimestamp(remote.getCreationTimestamp());
 488         file.setFileLength(remote.getLength());
 489         file.setMimetype(remote.getMimeType());
 490         file.setModificationTimestamp(remote.getModifiedTimestamp());
 491         file.setEtag(remote.getEtag());
 492         file.setPermissions(remote.getPermissions());
 493         file.setRemoteId(remote.getRemoteId());
 494         return file;
 495     }
 496
 497
 498     /**
 499      * Scans the default location for saving local copies of files searching for
 500      * a 'lost' file with the same full name as the {@link com.owncloud.android.datamodel.OCFile}
 501      * received as parameter.
 502      *
 503      * @param file      File to associate a possible 'lost' local file.
 504      */
 505     private void searchForLocalFileInDefaultPath(OCFile file) {
 506         if (file.getStoragePath() == null && !file.isFolder()) {
 507             File f = new File(FileStorageUtils.getDefaultSavePathFor(mAccount.name, file));
 508             if (f.exists()) {
 509                 file.setStoragePath(f.getAbsolutePath());
 510                 file.setLastSyncDateForData(f.lastModified());
 511             }
 512         }
 513     }
 514
 515
 516     /**
 517      * Cancel operation
 518      */
 519     public void cancel() {
 520         mCancellationRequested.set(true);
 521     }
 522
 523     public String getFolderPath() {
 524         String path = mLocalFolder.getStoragePath();
 525         if (path != null && path.length() > 0) {
 526             return path;
 527         }
 528         return FileStorageUtils.getDefaultSavePathFor(mAccount.name, mLocalFolder);
 529     }
 530
 531     private void startSyncFolderOperation(String path){
 532         Intent intent = new Intent(mContext, OperationsService.class);
 533         intent.setAction(OperationsService.ACTION_SYNC_FOLDER);
 534         intent.putExtra(OperationsService.EXTRA_ACCOUNT, mAccount);
 535         intent.putExtra(OperationsService.EXTRA_REMOTE_PATH, path);
 536         mContext.startService(intent);
 537     }
 538
 539     public String getRemotePath() {
 540         return mRemotePath;
 541     }
 542 }