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

   1 /**
   2  *   ownCloud Android client application
   3  *
   4  *   @author Bartek Przybylski
   5  *   @author David A. Velasco
   6  *   Copyright (C) 2011  Bartek Przybylski
   7  *   Copyright (C) 2015 ownCloud Inc.
   8  *
   9  *   This program is free software: you can redistribute it and/or modify
  10  *   it under the terms of the GNU General Public License version 2,
  11  *   as published by the Free Software Foundation.
  12  *
  13  *   This program is distributed in the hope that it will be useful,
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *   GNU General Public License for more details.
  17  *
  18  *   You should have received a copy of the GNU General Public License
  19  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  *
  21  */
  22
  23 package com.owncloud.android.syncadapter;
  24
  25 import java.io.IOException;
  26 import java.util.ArrayList;
  27 import java.util.HashMap;
  28 import java.util.List;
  29 import java.util.Map;
  30
  31 import org.apache.jackrabbit.webdav.DavException;
  32
  33 import com.owncloud.android.MainApp;
  34 import com.owncloud.android.R;
  35 import com.owncloud.android.authentication.AuthenticatorActivity;
  36 import com.owncloud.android.datamodel.FileDataStorageManager;
  37 import com.owncloud.android.datamodel.OCFile;
  38 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  39 import com.owncloud.android.operations.RefreshFolderOperation;
  40 import com.owncloud.android.operations.UpdateOCVersionOperation;
  41 import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
  42 import com.owncloud.android.lib.common.utils.Log_OC;
  43 import com.owncloud.android.ui.activity.ErrorsWhileCopyingHandlerActivity;
  44
  45 import android.accounts.Account;
  46 import android.accounts.AccountsException;
  47 import android.app.NotificationManager;
  48 import android.app.PendingIntent;
  49 import android.content.AbstractThreadedSyncAdapter;
  50 import android.content.ContentProviderClient;
  51 import android.content.ContentResolver;
  52 import android.content.Context;
  53 import android.content.Intent;
  54 import android.content.SyncResult;
  55 import android.os.Bundle;
  56 import android.support.v4.app.NotificationCompat;
  57
  58 /**
  59  * Implementation of {@link AbstractThreadedSyncAdapter} responsible for synchronizing
  60  * ownCloud files.
  61  *
  62  * Performs a full synchronization of the account recieved in {@link #onPerformSync(Account, Bundle,
  63  * String, ContentProviderClient, SyncResult)}.
  64  */
  65 public class FileSyncAdapter extends AbstractOwnCloudSyncAdapter {
  66
  67     private final static String TAG = FileSyncAdapter.class.getSimpleName();
  68
  69     /** Maximum number of failed folder synchronizations that are supported before finishing
  70      * the synchronization operation */
  71     private static final int MAX_FAILED_RESULTS = 3;
  72
  73
  74     public static final String EVENT_FULL_SYNC_START = FileSyncAdapter.class.getName() +
  75             ".EVENT_FULL_SYNC_START";
  76     public static final String EVENT_FULL_SYNC_END = FileSyncAdapter.class.getName() +
  77             ".EVENT_FULL_SYNC_END";
  78     public static final String EVENT_FULL_SYNC_FOLDER_CONTENTS_SYNCED =
  79             FileSyncAdapter.class.getName() + ".EVENT_FULL_SYNC_FOLDER_CONTENTS_SYNCED";
  80     //public static final String EVENT_FULL_SYNC_FOLDER_SIZE_SYNCED =
  81     // FileSyncAdapter.class.getName() + ".EVENT_FULL_SYNC_FOLDER_SIZE_SYNCED";
  82
  83     public static final String EXTRA_ACCOUNT_NAME = FileSyncAdapter.class.getName() +
  84             ".EXTRA_ACCOUNT_NAME";
  85     public static final String EXTRA_FOLDER_PATH = FileSyncAdapter.class.getName() +
  86             ".EXTRA_FOLDER_PATH";
  87     public static final String EXTRA_RESULT = FileSyncAdapter.class.getName() + ".EXTRA_RESULT";
  88
  89
  90     /** Time stamp for the current synchronization process, used to distinguish fresh data */
  91     private long mCurrentSyncTime;
  92
  93     /** Flag made 'true' when a request to cancel the synchronization is received */
  94     private boolean mCancellation;
  95
  96     /** When 'true' the process was requested by the user through the user interface;
  97      *  when 'false', it was requested automatically by the system */
  98     private boolean mIsManualSync;
  99
 100     /** Counter for failed operations in the synchronization process */
 101     private int mFailedResultsCounter;
 102
 103     /** Result of the last failed operation */
 104     private RemoteOperationResult mLastFailedResult;
 105
 106     /** Counter of conflicts found between local and remote files */
 107     private int mConflictsFound;
 108
 109     /** Counter of failed operations in synchronization of kept-in-sync files */
 110     private int mFailsInFavouritesFound;
 111
 112     /** Map of remote and local paths to files that where locally stored in a location out
 113      * of the ownCloud folder and couldn't be copied automatically into it */
 114     private Map<String, String> mForgottenLocalFiles;
 115
 116     /** {@link SyncResult} instance to return to the system when the synchronization finish */
 117     private SyncResult mSyncResult;
 118
 119     /** 'True' means that the server supports the share API */
 120     private boolean mIsShareSupported;
 121
 122
 123     /**
 124      * Creates a {@link FileSyncAdapter}
 125      *
 126      * {@inheritDoc}
 127      */
 128     public FileSyncAdapter(Context context, boolean autoInitialize) {
 129         super(context, autoInitialize);
 130     }
 131
 132
 133     /**
 134      * Creates a {@link FileSyncAdapter}
 135      *
 136      * {@inheritDoc}
 137      */
 138     public FileSyncAdapter(Context context, boolean autoInitialize, boolean allowParallelSyncs) {
 139         super(context, autoInitialize, allowParallelSyncs);
 140     }
 141
 142
 143     /**
 144      * {@inheritDoc}
 145      */
 146     @Override
 147     public synchronized void onPerformSync(Account account, Bundle extras,
 148             String authority, ContentProviderClient providerClient,
 149             SyncResult syncResult) {
 150
 151         mCancellation = false;
 152         mIsManualSync = extras.getBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, false);
 153         mFailedResultsCounter = 0;
 154         mLastFailedResult = null;
 155         mConflictsFound = 0;
 156         mFailsInFavouritesFound = 0;
 157         mForgottenLocalFiles = new HashMap<String, String>();
 158         mSyncResult = syncResult;
 159         mSyncResult.fullSyncRequested = false;
 160         mSyncResult.delayUntil = 60*60*24; // avoid too many automatic synchronizations
 161
 162         this.setAccount(account);
 163         this.setContentProviderClient(providerClient);
 164         this.setStorageManager(new FileDataStorageManager(account, providerClient));
 165
 166         try {
 167             this.initClientForCurrentAccount();
 168         } catch (IOException e) {
 169             /// the account is unknown for the Synchronization Manager, unreachable this context,
 170             // or can not be authenticated; don't try this again
 171             mSyncResult.tooManyRetries = true;
 172             notifyFailedSynchronization();
 173             return;
 174         } catch (AccountsException e) {
 175             /// the account is unknown for the Synchronization Manager, unreachable this context,
 176             // or can not be authenticated; don't try this again
 177             mSyncResult.tooManyRetries = true;
 178             notifyFailedSynchronization();
 179             return;
 180         }
 181
 182         Log_OC.d(TAG, "Synchronization of ownCloud account " + account.name + " starting");
 183         sendLocalBroadcast(EVENT_FULL_SYNC_START, null, null);  // message to signal the start
 184                                                                 // of the synchronization to the UI
 185
 186         try {
 187             updateOCVersion();
 188             mCurrentSyncTime = System.currentTimeMillis();
 189             if (!mCancellation) {
 190                 synchronizeFolder(getStorageManager().getFileByPath(OCFile.ROOT_PATH));
 191
 192             } else {
 193                 Log_OC.d(TAG, "Leaving synchronization before synchronizing the root folder " +
 194                         "because cancelation request");
 195             }
 196
 197
 198         } finally {
 199             // it's important making this although very unexpected errors occur;
 200             // that's the reason for the finally
 201
 202             if (mFailedResultsCounter > 0 && mIsManualSync) {
 203                 /// don't let the system synchronization manager retries MANUAL synchronizations
 204                 //      (be careful: "MANUAL" currently includes the synchronization requested when
 205                 //      a new account is created and when the user changes the current account)
 206                 mSyncResult.tooManyRetries = true;
 207
 208                 /// notify the user about the failure of MANUAL synchronization
 209                 notifyFailedSynchronization();
 210             }
 211             if (mConflictsFound > 0 || mFailsInFavouritesFound > 0) {
 212                 notifyFailsInFavourites();
 213             }
 214             if (mForgottenLocalFiles.size() > 0) {
 215                 notifyForgottenLocalFiles();
 216             }
 217             sendLocalBroadcast(EVENT_FULL_SYNC_END, null, mLastFailedResult);   // message to signal
 218                                                                                 // the end to the UI
 219         }
 220
 221     }
 222
 223     /**
 224      * Called by system SyncManager when a synchronization is required to be cancelled.
 225      *
 226      * Sets the mCancellation flag to 'true'. THe synchronization will be stopped later,
 227      * before a new folder is fetched. Data of the last folder synchronized will be still
 228      * locally saved.
 229      *
 230      * See {@link #onPerformSync(Account, Bundle, String, ContentProviderClient, SyncResult)}
 231      * and {@link #synchronizeFolder(OCFile)}.
 232      */
 233     @Override
 234     public void onSyncCanceled() {
 235         Log_OC.d(TAG, "Synchronization of " + getAccount().name + " has been requested to cancel");
 236         mCancellation = true;
 237         super.onSyncCanceled();
 238     }
 239
 240
 241     /**
 242      * Updates the locally stored version value of the ownCloud server
 243      */
 244     private void updateOCVersion() {
 245         UpdateOCVersionOperation update = new UpdateOCVersionOperation(getAccount(), getContext());
 246         RemoteOperationResult result = update.execute(getClient());
 247         if (!result.isSuccess()) {
 248             mLastFailedResult = result;
 249         } else {
 250             mIsShareSupported = update.getOCVersion().isSharedSupported();
 251         }
 252     }
 253
 254
 255     /**
 256      *  Synchronizes the list of files contained in a folder identified with its remote path.
 257      *
 258      *  Fetches the list and properties of the files contained in the given folder, including their
 259      *  properties, and updates the local database with them.
 260      *
 261      *  Enters in the child folders to synchronize their contents also, following a recursive
 262      *  depth first strategy.
 263      *
 264      *  @param folder                   Folder to synchronize.
 265      */
 266     private void synchronizeFolder(OCFile folder) {
 267
 268         if (mFailedResultsCounter > MAX_FAILED_RESULTS || isFinisher(mLastFailedResult))
 269             return;
 270
 271         /*
 272         OCFile folder,
 273         long currentSyncTime,
 274         boolean updateFolderProperties,
 275         boolean syncFullAccount,
 276         DataStorageManager dataStorageManager,
 277         Account account,
 278         Context context ) {
 279         }
 280         */
 281         // folder synchronization
 282         RefreshFolderOperation synchFolderOp = new RefreshFolderOperation( folder,
 283                                                                                    mCurrentSyncTime,
 284                                                                                    true,
 285                                                                                    mIsShareSupported,
 286                                                                                    false,
 287                                                                                    getStorageManager(),
 288                                                                                    getAccount(),
 289                                                                                    getContext()
 290                                                                                   );
 291         RemoteOperationResult result = synchFolderOp.execute(getClient());
 292
 293
 294         // synchronized folder -> notice to UI - ALWAYS, although !result.isSuccess
 295         sendLocalBroadcast(EVENT_FULL_SYNC_FOLDER_CONTENTS_SYNCED, folder.getRemotePath(), result);
 296
 297         // check the result of synchronizing the folder
 298         if (result.isSuccess() || result.getCode() == ResultCode.SYNC_CONFLICT) {
 299
 300             if (result.getCode() == ResultCode.SYNC_CONFLICT) {
 301                 mConflictsFound += synchFolderOp.getConflictsFound();
 302                 mFailsInFavouritesFound += synchFolderOp.getFailsInFavouritesFound();
 303             }
 304             if (synchFolderOp.getForgottenLocalFiles().size() > 0) {
 305                 mForgottenLocalFiles.putAll(synchFolderOp.getForgottenLocalFiles());
 306             }
 307             if (result.isSuccess()) {
 308                 // synchronize children folders
 309                 List<OCFile> children = synchFolderOp.getChildren();
 310                 // beware of the 'hidden' recursion here!
 311                 fetchChildren(folder, children, synchFolderOp.getRemoteFolderChanged());
 312             }
 313
 314         } else {
 315             // in failures, the statistics for the global result are updated
 316             if (    result.getCode() == RemoteOperationResult.ResultCode.UNAUTHORIZED ||
 317                     result.isIdPRedirection()
 318                 ) {
 319                 mSyncResult.stats.numAuthExceptions++;
 320
 321             } else if (result.getException() instanceof DavException) {
 322                 mSyncResult.stats.numParseExceptions++;
 323
 324             } else if (result.getException() instanceof IOException) {
 325                 mSyncResult.stats.numIoExceptions++;
 326             }
 327             mFailedResultsCounter++;
 328             mLastFailedResult = result;
 329         }
 330
 331     }
 332
 333     /**
 334      * Checks if a failed result should terminate the synchronization process immediately,
 335      * according to OUR OWN POLICY
 336      *
 337      * @param   failedResult        Remote operation result to check.
 338      * @return                      'True' if the result should immediately finish the
 339      *                              synchronization
 340      */
 341     private boolean isFinisher(RemoteOperationResult failedResult) {
 342         if  (failedResult != null) {
 343             RemoteOperationResult.ResultCode code = failedResult.getCode();
 344             return (code.equals(RemoteOperationResult.ResultCode.SSL_ERROR) ||
 345                     code.equals(RemoteOperationResult.ResultCode.SSL_RECOVERABLE_PEER_UNVERIFIED) ||
 346                     code.equals(RemoteOperationResult.ResultCode.BAD_OC_VERSION) ||
 347                     code.equals(RemoteOperationResult.ResultCode.INSTANCE_NOT_CONFIGURED));
 348         }
 349         return false;
 350     }
 351
 352     /**
 353      * Triggers the synchronization of any folder contained in the list of received files.
 354      *
 355      * @param files         Files to recursively synchronize.
 356      */
 357     private void fetchChildren(OCFile parent, List<OCFile> files, boolean parentEtagChanged) {
 358         int i;
 359         OCFile newFile = null;
 360         //String etag = null;
 361         //boolean syncDown = false;
 362         for (i=0; i < files.size() && !mCancellation; i++) {
 363             newFile = files.get(i);
 364             if (newFile.isFolder()) {
 365                 /*
 366                 etag = newFile.getEtag();
 367                 syncDown = (parentEtagChanged || etag == null || etag.length() == 0);
 368                 if(syncDown) { */
 369                     synchronizeFolder(newFile);
 370                     //sendLocalBroadcast(EVENT_FULL_SYNC_FOLDER_SIZE_SYNCED, parent.getRemotePath(),
 371                     // null);
 372                 //}
 373             }
 374         }
 375
 376         if (mCancellation && i <files.size()) Log_OC.d(TAG,
 377                 "Leaving synchronization before synchronizing " + files.get(i).getRemotePath() +
 378                         " due to cancelation request");
 379     }
 380
 381
 382     /**
 383      * Sends a message to any application component interested in the progress of the
 384      * synchronization.
 385      *
 386      * @param event             Event in the process of synchronization to be notified.
 387      * @param dirRemotePath     Remote path of the folder target of the event occurred.
 388      * @param result            Result of an individual {@ SynchronizeFolderOperation},
 389      *                          if completed; may be null.
 390      */
 391     private void sendLocalBroadcast(String event, String dirRemotePath,
 392                                     RemoteOperationResult result) {
 393         Log_OC.d(TAG, "Send broadcast " + event);
 394         Intent intent = new Intent(event);
 395         intent.putExtra(FileSyncAdapter.EXTRA_ACCOUNT_NAME, getAccount().name);
 396         if (dirRemotePath != null) {
 397             intent.putExtra(FileSyncAdapter.EXTRA_FOLDER_PATH, dirRemotePath);
 398         }
 399         if (result != null) {
 400             intent.putExtra(FileSyncAdapter.EXTRA_RESULT, result);
 401         }
 402         getContext().sendStickyBroadcast(intent);
 403         //LocalBroadcastManager.getInstance(getContext()).sendBroadcast(intent);
 404     }
 405
 406
 407
 408     /**
 409      * Notifies the user about a failed synchronization through the status notification bar
 410      */
 411     private void notifyFailedSynchronization() {
 412         NotificationCompat.Builder notificationBuilder = createNotificationBuilder();
 413         boolean needsToUpdateCredentials = (
 414                 mLastFailedResult != null && (
 415                         mLastFailedResult.getCode() == ResultCode.UNAUTHORIZED ||
 416                         mLastFailedResult.isIdPRedirection()
 417                 )
 418         );
 419         if (needsToUpdateCredentials) {
 420             // let the user update credentials with one click
 421             Intent updateAccountCredentials = new Intent(getContext(), AuthenticatorActivity.class);
 422             updateAccountCredentials.putExtra(AuthenticatorActivity.EXTRA_ACCOUNT, getAccount());
 423             updateAccountCredentials.putExtra(AuthenticatorActivity.EXTRA_ACTION,
 424                     AuthenticatorActivity.ACTION_UPDATE_EXPIRED_TOKEN);
 425             updateAccountCredentials.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
 426             updateAccountCredentials.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
 427             updateAccountCredentials.addFlags(Intent.FLAG_FROM_BACKGROUND);
 428             notificationBuilder
 429                 .setTicker(i18n(R.string.sync_fail_ticker_unauthorized))
 430                 .setContentTitle(i18n(R.string.sync_fail_ticker_unauthorized))
 431                 .setContentIntent(PendingIntent.getActivity(
 432                     getContext(), (int)System.currentTimeMillis(), updateAccountCredentials,
 433                         PendingIntent.FLAG_ONE_SHOT
 434                 ))
 435                 .setContentText(i18n(R.string.sync_fail_content_unauthorized, getAccount().name));
 436         } else {
 437             notificationBuilder
 438                 .setTicker(i18n(R.string.sync_fail_ticker))
 439                 .setContentTitle(i18n(R.string.sync_fail_ticker))
 440                 .setContentText(i18n(R.string.sync_fail_content, getAccount().name));
 441         }
 442
 443         showNotification(R.string.sync_fail_ticker, notificationBuilder);
 444     }
 445
 446
 447     /**
 448      * Notifies the user about conflicts and strange fails when trying to synchronize the contents
 449      * of kept-in-sync files.
 450      *
 451      * By now, we won't consider a failed synchronization.
 452      */
 453     private void notifyFailsInFavourites() {
 454         if (mFailedResultsCounter > 0) {
 455             NotificationCompat.Builder notificationBuilder = createNotificationBuilder();
 456             notificationBuilder.setTicker(i18n(R.string.sync_fail_in_favourites_ticker));
 457
 458             // TODO put something smart in the contentIntent below
 459             notificationBuilder
 460                 .setContentIntent(PendingIntent.getActivity(
 461                     getContext(), (int) System.currentTimeMillis(), new Intent(), 0
 462                 ))
 463                 .setContentTitle(i18n(R.string.sync_fail_in_favourites_ticker))
 464                 .setContentText(i18n(R.string.sync_fail_in_favourites_content,
 465                         mFailedResultsCounter + mConflictsFound, mConflictsFound));
 466
 467             showNotification(R.string.sync_fail_in_favourites_ticker, notificationBuilder);
 468         } else {
 469             NotificationCompat.Builder notificationBuilder = createNotificationBuilder();
 470             notificationBuilder.setTicker(i18n(R.string.sync_conflicts_in_favourites_ticker));
 471
 472             // TODO put something smart in the contentIntent below
 473             notificationBuilder
 474                 .setContentIntent(PendingIntent.getActivity(
 475                     getContext(), (int) System.currentTimeMillis(), new Intent(), 0
 476                 ))
 477                 .setContentTitle(i18n(R.string.sync_conflicts_in_favourites_ticker))
 478                 .setContentText(i18n(R.string.sync_conflicts_in_favourites_ticker, mConflictsFound));
 479
 480             showNotification(R.string.sync_conflicts_in_favourites_ticker, notificationBuilder);
 481         }
 482     }
 483
 484     /**
 485      * Notifies the user about local copies of files out of the ownCloud local directory that
 486      * were 'forgotten' because copying them inside the ownCloud local directory was not possible.
 487      *
 488      * We don't want links to files out of the ownCloud local directory (foreign files) anymore.
 489      * It's easy to have synchronization problems if a local file is linked to more than one
 490      * remote file.
 491      *
 492      * We won't consider a synchronization as failed when foreign files can not be copied to
 493      * the ownCloud local directory.
 494      */
 495     private void notifyForgottenLocalFiles() {
 496         NotificationCompat.Builder notificationBuilder = createNotificationBuilder();
 497         notificationBuilder.setTicker(i18n(R.string.sync_foreign_files_forgotten_ticker));
 498
 499         /// includes a pending intent in the notification showing a more detailed explanation
 500         Intent explanationIntent = new Intent(getContext(), ErrorsWhileCopyingHandlerActivity.class);
 501         explanationIntent.putExtra(ErrorsWhileCopyingHandlerActivity.EXTRA_ACCOUNT, getAccount());
 502         ArrayList<String> remotePaths = new ArrayList<String>();
 503         ArrayList<String> localPaths = new ArrayList<String>();
 504         remotePaths.addAll(mForgottenLocalFiles.keySet());
 505         localPaths.addAll(mForgottenLocalFiles.values());
 506         explanationIntent.putExtra(ErrorsWhileCopyingHandlerActivity.EXTRA_LOCAL_PATHS, localPaths);
 507         explanationIntent.putExtra(ErrorsWhileCopyingHandlerActivity.EXTRA_REMOTE_PATHS, remotePaths);
 508         explanationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 509
 510         notificationBuilder
 511             .setContentIntent(PendingIntent.getActivity(
 512                 getContext(), (int) System.currentTimeMillis(), explanationIntent, 0
 513             ))
 514             .setContentTitle(i18n(R.string.sync_foreign_files_forgotten_ticker))
 515             .setContentText(i18n(R.string.sync_foreign_files_forgotten_content,
 516                     mForgottenLocalFiles.size(), i18n(R.string.app_name)));
 517
 518         showNotification(R.string.sync_foreign_files_forgotten_ticker, notificationBuilder);
 519     }
 520
 521     /**
 522      * Creates a notification builder with some commonly used settings
 523      *
 524      * @return
 525      */
 526     private NotificationCompat.Builder createNotificationBuilder() {
 527         NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(getContext());
 528         notificationBuilder.setSmallIcon(R.drawable.notification_icon).setAutoCancel(true);
 529         return notificationBuilder;
 530     }
 531
 532     /**
 533      * Builds and shows the notification
 534      *
 535      * @param id
 536      * @param builder
 537      */
 538     private void showNotification(int id, NotificationCompat.Builder builder) {
 539         ((NotificationManager) getContext().getSystemService(Context.NOTIFICATION_SERVICE))
 540             .notify(id, builder.build());
 541     }
 542     /**
 543      * Shorthand translation
 544      *
 545      * @param key
 546      * @param args
 547      * @return
 548      */
 549     private String i18n(int key, Object... args) {
 550         return getContext().getString(key, args);
 551     }
 552 }