src/com/owncloud/android/syncadapter/FileSyncAdapter.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2011  Bartek Przybylski
   3  *   Copyright (C) 2012-2013 ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License version 2,
   7  *   as published by the Free Software Foundation.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18
  19 package com.owncloud.android.syncadapter;
  20
  21 import java.io.IOException;
  22 import java.util.ArrayList;
  23 import java.util.HashMap;
  24 import java.util.List;
  25 import java.util.Map;
  26
  27 import org.apache.jackrabbit.webdav.DavException;
  28
  29 import com.owncloud.android.Log_OC;
  30 import com.owncloud.android.R;
  31 import com.owncloud.android.authentication.AuthenticatorActivity;
  32 import com.owncloud.android.datamodel.DataStorageManager;
  33 import com.owncloud.android.datamodel.FileDataStorageManager;
  34 import com.owncloud.android.datamodel.OCFile;
  35 import com.owncloud.android.operations.RemoteOperationResult;
  36 import com.owncloud.android.operations.SynchronizeFolderOperation;
  37 import com.owncloud.android.operations.UpdateOCVersionOperation;
  38 import com.owncloud.android.operations.RemoteOperationResult.ResultCode;
  39 import com.owncloud.android.ui.activity.ErrorsWhileCopyingHandlerActivity;
  40 import com.owncloud.android.utils.FileStorageUtils;
  41
  42 import android.accounts.Account;
  43 import android.accounts.AccountsException;
  44 import android.app.Notification;
  45 import android.app.NotificationManager;
  46 import android.app.PendingIntent;
  47 import android.content.ContentProviderClient;
  48 import android.content.ContentResolver;
  49 import android.content.Context;
  50 import android.content.Intent;
  51 import android.content.SyncResult;
  52 import android.os.Bundle;
  53
  54 /**
  55  * SyncAdapter implementation for syncing sample SyncAdapter contacts to the
  56  * platform ContactOperations provider.
  57  *
  58  * @author Bartek Przybylski
  59  * @author David A. Velasco
  60  */
  61 public class FileSyncAdapter extends AbstractOwnCloudSyncAdapter {
  62
  63     private final static String TAG = "FileSyncAdapter";
  64
  65     /**
  66      * Maximum number of failed folder synchronizations that are supported before finishing the synchronization operation
  67      */
  68     private static final int MAX_FAILED_RESULTS = 3;
  69
  70     private long mCurrentSyncTime;
  71     private boolean mCancellation;
  72     private boolean mIsManualSync;
  73     private int mFailedResultsCounter;
  74     private RemoteOperationResult mLastFailedResult;
  75     private SyncResult mSyncResult;
  76     private int mConflictsFound;
  77     private int mFailsInFavouritesFound;
  78     private Map<String, String> mForgottenLocalFiles;
  79
  80
  81     public FileSyncAdapter(Context context, boolean autoInitialize) {
  82         super(context, autoInitialize);
  83     }
  84
  85     /**
  86      * {@inheritDoc}
  87      */
  88     @Override
  89     public synchronized void onPerformSync(Account account, Bundle extras,
  90             String authority, ContentProviderClient provider,
  91             SyncResult syncResult) {
  92
  93         mCancellation = false;
  94         mIsManualSync = extras.getBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, false);
  95         mFailedResultsCounter = 0;
  96         mLastFailedResult = null;
  97         mConflictsFound = 0;
  98         mFailsInFavouritesFound = 0;
  99         mForgottenLocalFiles = new HashMap<String, String>();
 100         mSyncResult = syncResult;
 101         mSyncResult.fullSyncRequested = false;
 102         mSyncResult.delayUntil = 60*60*24; // sync after 24h
 103
 104         this.setAccount(account);
 105         this.setContentProvider(provider);
 106         this.setStorageManager(new FileDataStorageManager(account, getContentProvider()));
 107         try {
 108             this.initClientForCurrentAccount();
 109         } catch (IOException e) {
 110             /// the account is unknown for the Synchronization Manager, or unreachable for this context; don't try this again
 111             mSyncResult.tooManyRetries = true;
 112             notifyFailedSynchronization();
 113             return;
 114         } catch (AccountsException e) {
 115             /// the account is unknown for the Synchronization Manager, or unreachable for this context; don't try this again
 116             mSyncResult.tooManyRetries = true;
 117             notifyFailedSynchronization();
 118             return;
 119         }
 120
 121         Log_OC.d(TAG, "Synchronization of ownCloud account " + account.name + " starting");
 122         sendStickyBroadcast(true, null, null);  // message to signal the start of the synchronization to the UI
 123
 124         try {
 125             updateOCVersion();
 126             mCurrentSyncTime = System.currentTimeMillis();
 127             if (!mCancellation) {
 128                 fetchData(OCFile.PATH_SEPARATOR, DataStorageManager.ROOT_PARENT_ID);
 129
 130             } else {
 131                 Log_OC.d(TAG, "Leaving synchronization before any remote request due to cancellation was requested");
 132             }
 133
 134
 135         } finally {
 136             // it's important making this although very unexpected errors occur; that's the reason for the finally
 137
 138             if (mFailedResultsCounter > 0 && mIsManualSync) {
 139                 /// don't let the system synchronization manager retries MANUAL synchronizations
 140                 //      (be careful: "MANUAL" currently includes the synchronization requested when a new account is created and when the user changes the current account)
 141                 mSyncResult.tooManyRetries = true;
 142
 143                 /// notify the user about the failure of MANUAL synchronization
 144                 notifyFailedSynchronization();
 145
 146             }
 147             if (mConflictsFound > 0 || mFailsInFavouritesFound > 0) {
 148                 notifyFailsInFavourites();
 149             }
 150             if (mForgottenLocalFiles.size() > 0) {
 151                 notifyForgottenLocalFiles();
 152
 153             }
 154             sendStickyBroadcast(false, null, mLastFailedResult);        // message to signal the end to the UI
 155         }
 156
 157     }
 158
 159     /**
 160      * Called by system SyncManager when a synchronization is required to be cancelled.
 161      *
 162      * Sets the mCancellation flag to 'true'. THe synchronization will be stopped when before a new folder is fetched. Data of the last folder
 163      * fetched will be still saved in the database. See onPerformSync implementation.
 164      */
 165     @Override
 166     public void onSyncCanceled() {
 167         Log_OC.d(TAG, "Synchronization of " + getAccount().name + " has been requested to cancel");
 168         mCancellation = true;
 169         super.onSyncCanceled();
 170     }
 171
 172
 173     /**
 174      * Updates the locally stored version value of the ownCloud server
 175      */
 176     private void updateOCVersion() {
 177         UpdateOCVersionOperation update = new UpdateOCVersionOperation(getAccount(), getContext());
 178         RemoteOperationResult result = update.execute(getClient());
 179         if (!result.isSuccess()) {
 180             mLastFailedResult = result;
 181         }
 182     }
 183
 184
 185     /**
 186      * Synchronize the properties of files and folders contained in a remote folder given by remotePath.
 187      *
 188      * @param remotePath        Remote path to the folder to synchronize.
 189      * @param parentId          Database Id of the folder to synchronize.
 190      */
 191     private void fetchData(String remotePath, long parentId) {
 192
 193         if (mFailedResultsCounter > MAX_FAILED_RESULTS || isFinisher(mLastFailedResult))
 194             return;
 195
 196         // perform folder synchronization
 197         SynchronizeFolderOperation synchFolderOp = new SynchronizeFolderOperation(  remotePath,
 198                                                                                     mCurrentSyncTime,
 199                                                                                     parentId,
 200                                                                                     getStorageManager(),
 201                                                                                     getAccount(),
 202                                                                                     getContext()
 203                                                                                   );
 204         RemoteOperationResult result = synchFolderOp.execute(getClient());
 205
 206
 207         // synchronized folder -> notice to UI - ALWAYS, although !result.isSuccess
 208         sendStickyBroadcast(true, remotePath, null);
 209
 210         if (result.isSuccess() || result.getCode() == ResultCode.SYNC_CONFLICT) {
 211
 212             if (result.getCode() == ResultCode.SYNC_CONFLICT) {
 213                 mConflictsFound += synchFolderOp.getConflictsFound();
 214                 mFailsInFavouritesFound += synchFolderOp.getFailsInFavouritesFound();
 215             }
 216             if (synchFolderOp.getForgottenLocalFiles().size() > 0) {
 217                 mForgottenLocalFiles.putAll(synchFolderOp.getForgottenLocalFiles());
 218             }
 219             // synchronize children folders
 220             List<OCFile> children = synchFolderOp.getChildren();
 221             fetchChildren(children);    // beware of the 'hidden' recursion here!
 222
 223         } else {
 224             if (result.getCode() == RemoteOperationResult.ResultCode.UNAUTHORIZED) {
 225                 mSyncResult.stats.numAuthExceptions++;
 226
 227             } else if (result.getException() instanceof DavException) {
 228                 mSyncResult.stats.numParseExceptions++;
 229
 230             } else if (result.getException() instanceof IOException) {
 231                 mSyncResult.stats.numIoExceptions++;
 232             }
 233             mFailedResultsCounter++;
 234             mLastFailedResult = result;
 235         }
 236
 237     }
 238
 239     /**
 240      * Checks if a failed result should terminate the synchronization process immediately, according to
 241      * OUR OWN POLICY
 242      *
 243      * @param   failedResult        Remote operation result to check.
 244      * @return                      'True' if the result should immediately finish the synchronization
 245      */
 246     private boolean isFinisher(RemoteOperationResult failedResult) {
 247         if  (failedResult != null) {
 248             RemoteOperationResult.ResultCode code = failedResult.getCode();
 249             return (code.equals(RemoteOperationResult.ResultCode.SSL_ERROR) ||
 250                     code.equals(RemoteOperationResult.ResultCode.SSL_RECOVERABLE_PEER_UNVERIFIED) ||
 251                     code.equals(RemoteOperationResult.ResultCode.BAD_OC_VERSION) ||
 252                     code.equals(RemoteOperationResult.ResultCode.INSTANCE_NOT_CONFIGURED));
 253         }
 254         return false;
 255     }
 256
 257     /**
 258      * Synchronize data of folders in the list of received files
 259      *
 260      * @param files         Files to recursively fetch
 261      */
 262     private void fetchChildren(List<OCFile> files) {
 263         int i;
 264         for (i=0; i < files.size() && !mCancellation; i++) {
 265             OCFile newFile = files.get(i);
 266             if (newFile.isDirectory()) {
 267                 fetchData(newFile.getRemotePath(), newFile.getFileId());
 268
 269                 // Update folder size on DB
 270                 getStorageManager().calculateFolderSize(newFile.getFileId());
 271             }
 272         }
 273
 274         if (mCancellation && i <files.size()) Log_OC.d(TAG, "Leaving synchronization before synchronizing " + files.get(i).getRemotePath() + " because cancelation request");
 275     }
 276
 277
 278     /**
 279      * Sends a message to any application component interested in the progress of the synchronization.
 280      *
 281      * @param inProgress        'True' when the synchronization progress is not finished.
 282      * @param dirRemotePath     Remote path of a folder that was just synchronized (with or without success)
 283      */
 284     private void sendStickyBroadcast(boolean inProgress, String dirRemotePath, RemoteOperationResult result) {
 285         Intent i = new Intent(FileSyncService.SYNC_MESSAGE);
 286         i.putExtra(FileSyncService.IN_PROGRESS, inProgress);
 287         i.putExtra(FileSyncService.ACCOUNT_NAME, getAccount().name);
 288         if (dirRemotePath != null) {
 289             i.putExtra(FileSyncService.SYNC_FOLDER_REMOTE_PATH, dirRemotePath);
 290         }
 291         if (result != null) {
 292             i.putExtra(FileSyncService.SYNC_RESULT, result);
 293         }
 294         getContext().sendStickyBroadcast(i);
 295     }
 296
 297
 298
 299     /**
 300      * Notifies the user about a failed synchronization through the status notification bar
 301      */
 302     private void notifyFailedSynchronization() {
 303         Notification notification = new Notification(R.drawable.icon, getContext().getString(R.string.sync_fail_ticker), System.currentTimeMillis());
 304         notification.flags |= Notification.FLAG_AUTO_CANCEL;
 305         boolean needsToUpdateCredentials = (mLastFailedResult != null && mLastFailedResult.getCode() == ResultCode.UNAUTHORIZED);
 306         // TODO put something smart in the contentIntent below for all the possible errors
 307         notification.contentIntent = PendingIntent.getActivity(getContext().getApplicationContext(), (int)System.currentTimeMillis(), new Intent(), 0);
 308         if (needsToUpdateCredentials) {
 309             // let the user update credentials with one click
 310             Intent updateAccountCredentials = new Intent(getContext(), AuthenticatorActivity.class);
 311             updateAccountCredentials.putExtra(AuthenticatorActivity.EXTRA_ACCOUNT, getAccount());
 312             updateAccountCredentials.putExtra(AuthenticatorActivity.EXTRA_ENFORCED_UPDATE, true);
 313             updateAccountCredentials.putExtra(AuthenticatorActivity.EXTRA_ACTION, AuthenticatorActivity.ACTION_UPDATE_TOKEN);
 314             updateAccountCredentials.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 315             updateAccountCredentials.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
 316             updateAccountCredentials.addFlags(Intent.FLAG_FROM_BACKGROUND);
 317             notification.contentIntent = PendingIntent.getActivity(getContext(), (int)System.currentTimeMillis(), updateAccountCredentials, PendingIntent.FLAG_ONE_SHOT);
 318             notification.setLatestEventInfo(getContext().getApplicationContext(),
 319                     getContext().getString(R.string.sync_fail_ticker),
 320                     String.format(getContext().getString(R.string.sync_fail_content_unauthorized), getAccount().name),
 321                     notification.contentIntent);
 322         } else {
 323             notification.setLatestEventInfo(getContext().getApplicationContext(),
 324                                             getContext().getString(R.string.sync_fail_ticker),
 325                                             String.format(getContext().getString(R.string.sync_fail_content), getAccount().name),
 326                                             notification.contentIntent);
 327         }
 328         ((NotificationManager) getContext().getSystemService(Context.NOTIFICATION_SERVICE)).notify(R.string.sync_fail_ticker, notification);
 329     }
 330
 331
 332     /**
 333      * Notifies the user about conflicts and strange fails when trying to synchronize the contents of kept-in-sync files.
 334      *
 335      * By now, we won't consider a failed synchronization.
 336      */
 337     private void notifyFailsInFavourites() {
 338         if (mFailedResultsCounter > 0) {
 339             Notification notification = new Notification(R.drawable.icon, getContext().getString(R.string.sync_fail_in_favourites_ticker), System.currentTimeMillis());
 340             notification.flags |= Notification.FLAG_AUTO_CANCEL;
 341             // TODO put something smart in the contentIntent below
 342             notification.contentIntent = PendingIntent.getActivity(getContext().getApplicationContext(), (int)System.currentTimeMillis(), new Intent(), 0);
 343             notification.setLatestEventInfo(getContext().getApplicationContext(),
 344                                             getContext().getString(R.string.sync_fail_in_favourites_ticker),
 345                                             String.format(getContext().getString(R.string.sync_fail_in_favourites_content), mFailedResultsCounter + mConflictsFound, mConflictsFound),
 346                                             notification.contentIntent);
 347             ((NotificationManager) getContext().getSystemService(Context.NOTIFICATION_SERVICE)).notify(R.string.sync_fail_in_favourites_ticker, notification);
 348
 349         } else {
 350             Notification notification = new Notification(R.drawable.icon, getContext().getString(R.string.sync_conflicts_in_favourites_ticker), System.currentTimeMillis());
 351             notification.flags |= Notification.FLAG_AUTO_CANCEL;
 352             // TODO put something smart in the contentIntent below
 353             notification.contentIntent = PendingIntent.getActivity(getContext().getApplicationContext(), (int)System.currentTimeMillis(), new Intent(), 0);
 354             notification.setLatestEventInfo(getContext().getApplicationContext(),
 355                                             getContext().getString(R.string.sync_conflicts_in_favourites_ticker),
 356                                             String.format(getContext().getString(R.string.sync_conflicts_in_favourites_content), mConflictsFound),
 357                                             notification.contentIntent);
 358             ((NotificationManager) getContext().getSystemService(Context.NOTIFICATION_SERVICE)).notify(R.string.sync_conflicts_in_favourites_ticker, notification);
 359         }
 360     }
 361
 362     /**
 363      * Notifies the user about local copies of files out of the ownCloud local directory that were 'forgotten' because
 364      * copying them inside the ownCloud local directory was not possible.
 365      *
 366      * We don't want links to files out of the ownCloud local directory (foreign files) anymore. It's easy to have
 367      * synchronization problems if a local file is linked to more than one remote file.
 368      *
 369      * We won't consider a synchronization as failed when foreign files can not be copied to the ownCloud local directory.
 370      */
 371     private void notifyForgottenLocalFiles() {
 372         Notification notification = new Notification(R.drawable.icon, getContext().getString(R.string.sync_foreign_files_forgotten_ticker), System.currentTimeMillis());
 373         notification.flags |= Notification.FLAG_AUTO_CANCEL;
 374
 375         /// includes a pending intent in the notification showing a more detailed explanation
 376         Intent explanationIntent = new Intent(getContext(), ErrorsWhileCopyingHandlerActivity.class);
 377         explanationIntent.putExtra(ErrorsWhileCopyingHandlerActivity.EXTRA_ACCOUNT, getAccount());
 378         ArrayList<String> remotePaths = new ArrayList<String>();
 379         ArrayList<String> localPaths = new ArrayList<String>();
 380         remotePaths.addAll(mForgottenLocalFiles.keySet());
 381         localPaths.addAll(mForgottenLocalFiles.values());
 382         explanationIntent.putExtra(ErrorsWhileCopyingHandlerActivity.EXTRA_LOCAL_PATHS, localPaths);
 383         explanationIntent.putExtra(ErrorsWhileCopyingHandlerActivity.EXTRA_REMOTE_PATHS, remotePaths);
 384         explanationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 385
 386         notification.contentIntent = PendingIntent.getActivity(getContext().getApplicationContext(), (int)System.currentTimeMillis(), explanationIntent, 0);
 387         notification.setLatestEventInfo(getContext().getApplicationContext(),
 388                                         getContext().getString(R.string.sync_foreign_files_forgotten_ticker),
 389                                         String.format(getContext().getString(R.string.sync_foreign_files_forgotten_content), mForgottenLocalFiles.size(), getContext().getString(R.string.app_name)),
 390                                         notification.contentIntent);
 391         ((NotificationManager) getContext().getSystemService(Context.NOTIFICATION_SERVICE)).notify(R.string.sync_foreign_files_forgotten_ticker, notification);
 392
 393     }
 394
 395
 396 }