src/com/owncloud/android/services/OperationsService.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012-2014 ownCloud Inc.
   3  *
   4  *   This program is free software: you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License version 2,
   6  *   as published by the Free Software Foundation.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  *
  13  *   You should have received a copy of the GNU General Public License
  14  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  */
  17
  18 package com.owncloud.android.services;
  19
  20 import java.io.IOException;
  21 import java.util.ArrayList;
  22 import java.util.Iterator;
  23 import java.util.concurrent.ConcurrentHashMap;
  24 import java.util.concurrent.ConcurrentLinkedQueue;
  25 import java.util.concurrent.ConcurrentMap;
  26
  27 import com.owncloud.android.MainApp;
  28 import com.owncloud.android.R;
  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.OwnCloudAccount;
  33 import com.owncloud.android.lib.common.OwnCloudClient;
  34 import com.owncloud.android.lib.common.OwnCloudClientManagerFactory;
  35 import com.owncloud.android.lib.common.OwnCloudCredentials;
  36 import com.owncloud.android.lib.common.OwnCloudCredentialsFactory;
  37 import com.owncloud.android.lib.common.accounts.AccountUtils.AccountNotFoundException;
  38 import com.owncloud.android.lib.common.operations.OnRemoteOperationListener;
  39 import com.owncloud.android.lib.common.operations.RemoteOperation;
  40 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  41 import com.owncloud.android.lib.common.utils.Log_OC;
  42 import com.owncloud.android.lib.resources.files.ExistenceCheckRemoteOperation;
  43 import com.owncloud.android.lib.resources.shares.ShareType;
  44 import com.owncloud.android.lib.resources.users.GetRemoteUserNameOperation;
  45 import com.owncloud.android.operations.common.SyncOperation;
  46 import com.owncloud.android.operations.CreateFolderOperation;
  47 import com.owncloud.android.operations.CreateShareOperation;
  48 import com.owncloud.android.operations.GetServerInfoOperation;
  49 import com.owncloud.android.operations.MoveFileOperation;
  50 import com.owncloud.android.operations.OAuth2GetAccessToken;
  51 import com.owncloud.android.operations.RemoveFileOperation;
  52 import com.owncloud.android.operations.RenameFileOperation;
  53 import com.owncloud.android.operations.SynchronizeFileOperation;
  54 import com.owncloud.android.operations.SynchronizeFolderOperation;
  55 import com.owncloud.android.operations.UnshareLinkOperation;
  56 import com.owncloud.android.utils.FileStorageUtils;
  57
  58 import android.accounts.Account;
  59 import android.accounts.AccountsException;
  60 import android.accounts.AuthenticatorException;
  61 import android.accounts.OperationCanceledException;
  62 import android.app.Service;
  63 import android.content.Intent;
  64 import android.net.Uri;
  65 import android.os.Binder;
  66 import android.os.Handler;
  67 import android.os.HandlerThread;
  68 import android.os.IBinder;
  69 import android.os.Looper;
  70 import android.os.Message;
  71 import android.os.Process;
  72 import android.util.Pair;
  73
  74 public class OperationsService extends Service {
  75
  76     private static final String TAG = OperationsService.class.getSimpleName();
  77
  78     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  79     public static final String EXTRA_SERVER_URL = "SERVER_URL";
  80     public static final String EXTRA_OAUTH2_QUERY_PARAMETERS = "OAUTH2_QUERY_PARAMETERS";
  81     public static final String EXTRA_REMOTE_PATH = "REMOTE_PATH";
  82     public static final String EXTRA_SEND_INTENT = "SEND_INTENT";
  83     public static final String EXTRA_NEWNAME = "NEWNAME";
  84     public static final String EXTRA_REMOVE_ONLY_LOCAL = "REMOVE_LOCAL_COPY";
  85     public static final String EXTRA_CREATE_FULL_PATH = "CREATE_FULL_PATH";
  86     public static final String EXTRA_SYNC_FILE_CONTENTS = "SYNC_FILE_CONTENTS";
  87     public static final String EXTRA_RESULT = "RESULT";
  88     public static final String EXTRA_NEW_PARENT_PATH = "NEW_PARENT_PATH";
  89     public static final String EXTRA_FILE = "FILE";
  90
  91     // TODO review if ALL OF THEM are necessary
  92     public static final String EXTRA_SUCCESS_IF_ABSENT = "SUCCESS_IF_ABSENT";
  93     public static final String EXTRA_USERNAME = "USERNAME";
  94     public static final String EXTRA_PASSWORD = "PASSWORD";
  95     public static final String EXTRA_AUTH_TOKEN = "AUTH_TOKEN";
  96     public static final String EXTRA_COOKIE = "COOKIE";
  97
  98     public static final String ACTION_CREATE_SHARE = "CREATE_SHARE";
  99     public static final String ACTION_UNSHARE = "UNSHARE";
 100     public static final String ACTION_GET_SERVER_INFO = "GET_SERVER_INFO";
 101     public static final String ACTION_OAUTH2_GET_ACCESS_TOKEN = "OAUTH2_GET_ACCESS_TOKEN";
 102     public static final String ACTION_EXISTENCE_CHECK = "EXISTENCE_CHECK";
 103     public static final String ACTION_GET_USER_NAME = "GET_USER_NAME";
 104     public static final String ACTION_RENAME = "RENAME";
 105     public static final String ACTION_REMOVE = "REMOVE";
 106     public static final String ACTION_CREATE_FOLDER = "CREATE_FOLDER";
 107     public static final String ACTION_SYNC_FILE = "SYNC_FILE";
 108     public static final String ACTION_SYNC_FOLDER = "SYNC_FOLDER";  // for the moment, just to download
 109     public static final String ACTION_CANCEL_SYNC_FOLDER = "CANCEL_SYNC_FOLDER";  // for the moment, just to download
 110     public static final String ACTION_MOVE_FILE = "MOVE_FILE";
 111
 112     public static final String ACTION_OPERATION_ADDED = OperationsService.class.getName() + ".OPERATION_ADDED";
 113     public static final String ACTION_OPERATION_FINISHED = OperationsService.class.getName() + ".OPERATION_FINISHED";
 114
 115
 116     private ConcurrentMap<Integer, Pair<RemoteOperation, RemoteOperationResult>>
 117         mUndispatchedFinishedOperations =
 118             new ConcurrentHashMap<Integer, Pair<RemoteOperation, RemoteOperationResult>>();
 119
 120     private static class Target {
 121         public Uri mServerUrl = null;
 122         public Account mAccount = null;
 123         public String mUsername = null;
 124         public String mPassword = null;
 125         public String mAuthToken = null;
 126         public String mCookie = null;
 127
 128         public Target(Account account, Uri serverUrl, String username, String password, String authToken,
 129                 String cookie) {
 130             mAccount = account;
 131             mServerUrl = serverUrl;
 132             mUsername = username;
 133             mPassword = password;
 134             mAuthToken = authToken;
 135             mCookie = cookie;
 136         }
 137     }
 138
 139     private ServiceHandler mOperationsHandler;
 140     private OperationsServiceBinder mOperationsBinder;
 141
 142     private SyncFolderHandler mSyncFolderHandler;
 143
 144     /**
 145      * Service initialization
 146      */
 147     @Override
 148     public void onCreate() {
 149         super.onCreate();
 150         /// First worker thread for most of operations
 151         HandlerThread thread = new HandlerThread("Operations thread", Process.THREAD_PRIORITY_BACKGROUND);
 152         thread.start();
 153         mOperationsHandler = new ServiceHandler(thread.getLooper(), this);
 154         mOperationsBinder = new OperationsServiceBinder(mOperationsHandler);
 155
 156         /// Separated worker thread for download of folders (WIP)
 157         thread = new HandlerThread("Syncfolder thread", Process.THREAD_PRIORITY_BACKGROUND);
 158         thread.start();
 159         mSyncFolderHandler = new SyncFolderHandler(thread.getLooper(), this);
 160     }
 161
 162
 163     /**
 164      * Entry point to add a new operation to the queue of operations.
 165      *
 166      * New operations are added calling to startService(), resulting in a call to this method.
 167      * This ensures the service will keep on working although the caller activity goes away.
 168      */
 169     @Override
 170     public int onStartCommand(Intent intent, int flags, int startId) {
 171         // WIP: for the moment, only SYNC_FOLDER and CANCEL_SYNC_FOLDER is expected here;
 172         // the rest of the operations are requested through the Binder
 173         if (ACTION_SYNC_FOLDER.equals(intent.getAction())) {
 174             if (!intent.hasExtra(EXTRA_ACCOUNT) || !intent.hasExtra(EXTRA_REMOTE_PATH)) {
 175                 Log_OC.e(TAG, "Not enough information provided in intent");
 176                 return START_NOT_STICKY;
 177             }
 178             Account account = intent.getParcelableExtra(EXTRA_ACCOUNT);
 179             String remotePath = intent.getStringExtra(EXTRA_REMOTE_PATH);
 180
 181             Pair<Account, String> itemSyncKey =  new Pair<Account , String>(account, remotePath);
 182
 183             Pair<Target, RemoteOperation> itemToQueue = newOperation(intent);
 184             if (itemToQueue != null) {
 185                 mSyncFolderHandler.add(account, remotePath, (SynchronizeFolderOperation)itemToQueue.second);
 186                 sendBroadcastNewSyncFolder(account, remotePath);
 187                 Message msg = mSyncFolderHandler.obtainMessage();
 188                 msg.arg1 = startId;
 189                 msg.obj = itemSyncKey;
 190                 mSyncFolderHandler.sendMessage(msg);
 191             }
 192         } else if (ACTION_CANCEL_SYNC_FOLDER.equals(intent.getAction())) {
 193             if (!intent.hasExtra(EXTRA_ACCOUNT) || !intent.hasExtra(EXTRA_FILE)) {
 194                 Log_OC.e(TAG, "Not enough information provided in intent");
 195                 return START_NOT_STICKY;
 196             }
 197             Account account = intent.getParcelableExtra(EXTRA_ACCOUNT);
 198             OCFile file = intent.getParcelableExtra(EXTRA_FILE);
 199
 200             // Cancel operation
 201             mSyncFolderHandler.cancel(account,file);
 202         } else {
 203             Message msg = mOperationsHandler.obtainMessage();
 204             msg.arg1 = startId;
 205             mOperationsHandler.sendMessage(msg);
 206         }
 207
 208         return START_NOT_STICKY;
 209     }
 210
 211     /**
 212      * TODO remove this method when "folder synchronization" replaces "folder download"; this is a fast and ugly
 213      * patch.
 214      */
 215     private void sendBroadcastNewSyncFolder(Account account, String remotePath) {
 216         Intent added = new Intent(FileDownloader.getDownloadAddedMessage());
 217         added.putExtra(FileDownloader.ACCOUNT_NAME, account.name);
 218         added.putExtra(FileDownloader.EXTRA_REMOTE_PATH, remotePath);
 219         added.putExtra(FileDownloader.EXTRA_FILE_PATH, FileStorageUtils.getSavePath(account.name) + remotePath);
 220         sendStickyBroadcast(added);
 221     }
 222
 223
 224     @Override
 225     public void onDestroy() {
 226         //Log_OC.wtf(TAG, "onDestroy init" );
 227         // Saving cookies
 228         try {
 229             OwnCloudClientManagerFactory.getDefaultSingleton().
 230                 saveAllClients(this, MainApp.getAccountType());
 231
 232             // TODO - get rid of these exceptions
 233         } catch (AccountNotFoundException e) {
 234             e.printStackTrace();
 235         } catch (AuthenticatorException e) {
 236             e.printStackTrace();
 237         } catch (OperationCanceledException e) {
 238             e.printStackTrace();
 239         } catch (IOException e) {
 240             e.printStackTrace();
 241         }
 242
 243         //Log_OC.wtf(TAG, "Clear mUndispatchedFinisiedOperations" );
 244         mUndispatchedFinishedOperations.clear();
 245
 246         //Log_OC.wtf(TAG, "onDestroy end" );
 247         super.onDestroy();
 248     }
 249
 250     /**
 251      * Provides a binder object that clients can use to perform actions on the queue of operations,
 252      * except the addition of new operations.
 253      */
 254     @Override
 255     public IBinder onBind(Intent intent) {
 256         //Log_OC.wtf(TAG, "onBind" );
 257         return mOperationsBinder;
 258     }
 259
 260
 261     /**
 262      * Called when ALL the bound clients were unbound.
 263      */
 264     @Override
 265     public boolean onUnbind(Intent intent) {
 266         ((OperationsServiceBinder)mOperationsBinder).clearListeners();
 267         return false;   // not accepting rebinding (default behaviour)
 268     }
 269
 270
 271     /**
 272      *  Binder to let client components to perform actions on the queue of operations.
 273      *
 274      *  It provides by itself the available operations.
 275      */
 276     public class OperationsServiceBinder extends Binder /* implements OnRemoteOperationListener */ {
 277
 278         /**
 279          * Map of listeners that will be reported about the end of operations from a {@link OperationsServiceBinder} instance
 280          */
 281         private ConcurrentMap<OnRemoteOperationListener, Handler> mBoundListeners =
 282                 new ConcurrentHashMap<OnRemoteOperationListener, Handler>();
 283
 284         private ServiceHandler mServiceHandler = null;
 285
 286
 287         public OperationsServiceBinder(ServiceHandler serviceHandler) {
 288             mServiceHandler = serviceHandler;
 289         }
 290
 291
 292         /**
 293          * Cancels an operation
 294          *
 295          * TODO
 296          */
 297         public void cancel() {
 298             // TODO
 299         }
 300
 301
 302         public void clearListeners() {
 303
 304             mBoundListeners.clear();
 305         }
 306
 307
 308         /**
 309          * Adds a listener interested in being reported about the end of operations.
 310          *
 311          * @param listener          Object to notify about the end of operations.
 312          * @param callbackHandler   {@link Handler} to access the listener without breaking Android threading protection.
 313          */
 314         public void addOperationListener (OnRemoteOperationListener listener, Handler callbackHandler) {
 315             synchronized (mBoundListeners) {
 316                 mBoundListeners.put(listener, callbackHandler);
 317             }
 318         }
 319
 320
 321         /**
 322          * Removes a listener from the list of objects interested in the being reported about the end of operations.
 323          *
 324          * @param listener      Object to notify about progress of transfer.
 325          */
 326         public void removeOperationListener (OnRemoteOperationListener listener) {
 327             synchronized (mBoundListeners) {
 328                 mBoundListeners.remove(listener);
 329             }
 330         }
 331
 332
 333         /**
 334          * TODO - IMPORTANT: update implementation when more operations are moved into the service
 335          *
 336          * @return  'True' when an operation that enforces the user to wait for completion is in process.
 337          */
 338         public boolean isPerformingBlockingOperation() {
 339             return (!mServiceHandler.mPendingOperations.isEmpty());
 340         }
 341
 342
 343         /**
 344          * Creates and adds to the queue a new operation, as described by operationIntent.
 345          *
 346          * Calls startService to make the operation is processed by the ServiceHandler.
 347          *
 348          * @param operationIntent       Intent describing a new operation to queue and execute.
 349          * @return                      Identifier of the operation created, or null if failed.
 350          */
 351         public long queueNewOperation(Intent operationIntent) {
 352             Pair<Target, RemoteOperation> itemToQueue = newOperation(operationIntent);
 353             if (itemToQueue != null) {
 354                 mServiceHandler.mPendingOperations.add(itemToQueue);
 355                 startService(new Intent(OperationsService.this, OperationsService.class));
 356                 return itemToQueue.second.hashCode();
 357
 358             } else {
 359                 return Long.MAX_VALUE;
 360             }
 361         }
 362
 363
 364         public boolean dispatchResultIfFinished(int operationId, OnRemoteOperationListener listener) {
 365             Pair<RemoteOperation, RemoteOperationResult> undispatched =
 366                     mUndispatchedFinishedOperations.remove(operationId);
 367             if (undispatched != null) {
 368                 listener.onRemoteOperationFinish(undispatched.first, undispatched.second);
 369                 return true;
 370                 //Log_OC.wtf(TAG, "Sending callback later");
 371             } else {
 372                 if (!mServiceHandler.mPendingOperations.isEmpty()) {
 373                     return true;
 374                 } else {
 375                     return false;
 376                 }
 377                 //Log_OC.wtf(TAG, "Not finished yet");
 378             }
 379         }
 380
 381
 382         /**
 383          * Returns True when the file described by 'file' in the ownCloud account 'account' is downloading or waiting to download.
 384          *
 385          * If 'file' is a directory, returns 'true' if some of its descendant files is downloading or waiting to download.
 386          *
 387          * @param account       ownCloud account where the remote file is stored.
 388          * @param file          A file that could be affected
 389          */
 390         public boolean isSynchronizing(Account account, String remotePath) {
 391             return mSyncFolderHandler.isSynchronizing(account, remotePath);
 392         }
 393
 394     }
 395
 396
 397     /**
 398      * SyncFolder worker. Performs the pending operations in the order they were requested.
 399      *
 400      * Created with the Looper of a new thread, started in {@link OperationsService#onCreate()}.
 401      */
 402     private static class SyncFolderHandler extends Handler {
 403
 404         // don't make it a final class, and don't remove the static ; lint will warn about a possible memory leak
 405
 406         OperationsService mService;
 407
 408         private ConcurrentMap<String,SynchronizeFolderOperation> mPendingOperations =
 409                 new ConcurrentHashMap<String,SynchronizeFolderOperation>();
 410         private OwnCloudClient mOwnCloudClient = null;
 411         private FileDataStorageManager mStorageManager;
 412         private SynchronizeFolderOperation mCurrentSyncOperation;
 413
 414
 415         public SyncFolderHandler(Looper looper, OperationsService service) {
 416             super(looper);
 417             if (service == null) {
 418                 throw new IllegalArgumentException("Received invalid NULL in parameter 'service'");
 419             }
 420             mService = service;
 421         }
 422
 423
 424         public boolean isSynchronizing(Account account, String remotePath) {
 425             if (account == null || remotePath == null) return false;
 426             String targetKey = buildRemoteName(account, remotePath);
 427             synchronized (mPendingOperations) {
 428                 return (mPendingOperations.containsKey(targetKey));
 429             }
 430         }
 431
 432
 433         @Override
 434         public void handleMessage(Message msg) {
 435             Pair<Account, String> itemSyncKey = (Pair<Account, String>) msg.obj;
 436             doOperation(itemSyncKey.first, itemSyncKey.second);
 437             mService.stopSelf(msg.arg1);
 438         }
 439
 440
 441         /**
 442          * Performs the next operation in the queue
 443          */
 444         private void doOperation(Account account, String remotePath) {
 445
 446             String syncKey = buildRemoteName(account,remotePath);
 447
 448             synchronized(mPendingOperations) {
 449                 mCurrentSyncOperation = mPendingOperations.get(syncKey);
 450             }
 451
 452             if (mCurrentSyncOperation != null) {
 453                 RemoteOperationResult result = null;
 454
 455                 try {
 456
 457                     OwnCloudAccount ocAccount = new OwnCloudAccount(account, mService);
 458                     mOwnCloudClient = OwnCloudClientManagerFactory.getDefaultSingleton().
 459                             getClientFor(ocAccount, mService);
 460                     mStorageManager = new FileDataStorageManager(
 461                             account,
 462                             mService.getContentResolver()
 463                     );
 464
 465                     result = mCurrentSyncOperation.execute(mOwnCloudClient, mStorageManager);
 466
 467                 } catch (AccountsException e) {
 468                     Log_OC.e(TAG, "Error while trying to get autorization", e);
 469                 } catch (IOException e) {
 470                     Log_OC.e(TAG, "Error while trying to get autorization", e);
 471                 } finally {
 472                     synchronized(mPendingOperations) {
 473                         mPendingOperations.remove(syncKey);
 474                     }
 475
 476                     mService.dispatchResultToOperationListeners(null, mCurrentSyncOperation, result);
 477                 }
 478             }
 479         }
 480
 481         public void add(Account account, String remotePath, SynchronizeFolderOperation syncFolderOperation){
 482             String syncKey = buildRemoteName(account,remotePath);
 483             mPendingOperations.putIfAbsent(syncKey,syncFolderOperation);
 484         }
 485
 486         /**
 487          * Cancels sync operations.
 488          * @param account       Owncloud account where the remote file is stored.
 489          * @param file          File OCFile
 490          */
 491         public void cancel(Account account, OCFile file){
 492             SynchronizeFolderOperation syncOperation = null;
 493             String targetKey = buildRemoteName(account, file.getRemotePath());
 494             ArrayList<String> keyItems = new ArrayList<String>();
 495             synchronized (mPendingOperations) {
 496                 if (file.isFolder()) {
 497                     Log_OC.d(TAG, "Canceling pending sync operations");
 498                     Iterator<String> it = mPendingOperations.keySet().iterator();
 499                     boolean found = false;
 500                     while (it.hasNext()) {
 501                         String keySyncOperation = it.next();
 502                         found = keySyncOperation.startsWith(targetKey);
 503                         if (found) {
 504                             keyItems.add(keySyncOperation);
 505                         }
 506                     }
 507                 } else {
 508                     // this is not really expected...
 509                     Log_OC.d(TAG, "Canceling sync operation");
 510                     keyItems.add(buildRemoteName(account, file.getRemotePath()));
 511                 }
 512             }
 513             for (String item: keyItems) {
 514                 syncOperation = mPendingOperations.remove(item);
 515                 Log_OC.d(TAG, "Key sync operations removed: " + item);
 516
 517                 if (syncOperation != null) {
 518                     syncOperation.cancel();
 519                 }
 520             }
 521
 522             /// cancellation of download needs to be done separately in any case; a SynchronizeFolderOperation
 523             //  may finish much sooner than the real download of the files in the folder
 524             Intent intent = new Intent(mService, FileDownloader.class);
 525             intent.setAction(FileDownloader.ACTION_CANCEL_FILE_DOWNLOAD);
 526             intent.putExtra(FileDownloader.EXTRA_ACCOUNT, account);
 527             intent.putExtra(FileDownloader.EXTRA_FILE, file);
 528             mService.startService(intent);
 529         }
 530
 531         /**
 532          * Builds a key from the account and file to download
 533          *
 534          * @param account   Account where the file to download is stored
 535          * @param path      File path
 536          */
 537         private String buildRemoteName(Account account, String path) {
 538             return account.name + path;
 539         }
 540     }
 541
 542
 543     /**
 544      * Operations worker. Performs the pending operations in the order they were requested.
 545      *
 546      * Created with the Looper of a new thread, started in {@link OperationsService#onCreate()}.
 547      */
 548     private static class ServiceHandler extends Handler {
 549         // don't make it a final class, and don't remove the static ; lint will warn about a possible memory leak
 550
 551
 552         OperationsService mService;
 553
 554
 555         private ConcurrentLinkedQueue<Pair<Target, RemoteOperation>> mPendingOperations =
 556                 new ConcurrentLinkedQueue<Pair<Target, RemoteOperation>>();
 557         private RemoteOperation mCurrentOperation = null;
 558         private Target mLastTarget = null;
 559         private OwnCloudClient mOwnCloudClient = null;
 560         private FileDataStorageManager mStorageManager;
 561
 562
 563         public ServiceHandler(Looper looper, OperationsService service) {
 564             super(looper);
 565             if (service == null) {
 566                 throw new IllegalArgumentException("Received invalid NULL in parameter 'service'");
 567             }
 568             mService = service;
 569         }
 570
 571         @Override
 572         public void handleMessage(Message msg) {
 573             nextOperation();
 574             mService.stopSelf(msg.arg1);
 575         }
 576
 577
 578         /**
 579          * Performs the next operation in the queue
 580          */
 581         private void nextOperation() {
 582
 583             //Log_OC.wtf(TAG, "nextOperation init" );
 584
 585             Pair<Target, RemoteOperation> next = null;
 586             synchronized(mPendingOperations) {
 587                 next = mPendingOperations.peek();
 588             }
 589
 590             if (next != null) {
 591
 592                 mCurrentOperation = next.second;
 593                 RemoteOperationResult result = null;
 594                 try {
 595                     /// prepare client object to send the request to the ownCloud server
 596                     if (mLastTarget == null || !mLastTarget.equals(next.first)) {
 597                         mLastTarget = next.first;
 598                         if (mLastTarget.mAccount != null) {
 599                             OwnCloudAccount ocAccount = new OwnCloudAccount(mLastTarget.mAccount, mService);
 600                             mOwnCloudClient = OwnCloudClientManagerFactory.getDefaultSingleton().
 601                                     getClientFor(ocAccount, mService);
 602                             mStorageManager = new FileDataStorageManager(
 603                                     mLastTarget.mAccount,
 604                                     mService.getContentResolver()
 605                             );
 606                         } else {
 607                             OwnCloudCredentials credentials = null;
 608                             if (mLastTarget.mUsername != null &&
 609                                     mLastTarget.mUsername.length() > 0) {
 610                                 credentials = OwnCloudCredentialsFactory.newBasicCredentials(
 611                                         mLastTarget.mUsername,
 612                                         mLastTarget.mPassword);  // basic
 613
 614                             } else if (mLastTarget.mAuthToken != null &&
 615                                     mLastTarget.mAuthToken.length() > 0) {
 616                                 credentials = OwnCloudCredentialsFactory.newBearerCredentials(
 617                                         mLastTarget.mAuthToken);  // bearer token
 618
 619                             } else if (mLastTarget.mCookie != null &&
 620                                     mLastTarget.mCookie.length() > 0) {
 621                                 credentials = OwnCloudCredentialsFactory.newSamlSsoCredentials(
 622                                         mLastTarget.mCookie); // SAML SSO
 623                             }
 624                             OwnCloudAccount ocAccount = new OwnCloudAccount(
 625                                     mLastTarget.mServerUrl, credentials);
 626                             mOwnCloudClient = OwnCloudClientManagerFactory.getDefaultSingleton().
 627                                     getClientFor(ocAccount, mService);
 628                             mStorageManager = null;
 629                         }
 630                     }
 631
 632                     /// perform the operation
 633                     if (mCurrentOperation instanceof SyncOperation) {
 634                         result = ((SyncOperation)mCurrentOperation).execute(mOwnCloudClient, mStorageManager);
 635                     } else {
 636                         result = mCurrentOperation.execute(mOwnCloudClient);
 637                     }
 638
 639                 } catch (AccountsException e) {
 640                     if (mLastTarget.mAccount == null) {
 641                         Log_OC.e(TAG, "Error while trying to get authorization for a NULL account", e);
 642                     } else {
 643                         Log_OC.e(TAG, "Error while trying to get authorization for " + mLastTarget.mAccount.name, e);
 644                     }
 645                     result = new RemoteOperationResult(e);
 646
 647                 } catch (IOException e) {
 648                     if (mLastTarget.mAccount == null) {
 649                         Log_OC.e(TAG, "Error while trying to get authorization for a NULL account", e);
 650                     } else {
 651                         Log_OC.e(TAG, "Error while trying to get authorization for " + mLastTarget.mAccount.name, e);
 652                     }
 653                     result = new RemoteOperationResult(e);
 654                 } catch (Exception e) {
 655                     if (mLastTarget.mAccount == null) {
 656                         Log_OC.e(TAG, "Unexpected error for a NULL account", e);
 657                     } else {
 658                         Log_OC.e(TAG, "Unexpected error for " + mLastTarget.mAccount.name, e);
 659                     }
 660                     result = new RemoteOperationResult(e);
 661
 662                 } finally {
 663                     synchronized(mPendingOperations) {
 664                         mPendingOperations.poll();
 665                     }
 666                 }
 667
 668                 //sendBroadcastOperationFinished(mLastTarget, mCurrentOperation, result);
 669                 mService.dispatchResultToOperationListeners(mLastTarget, mCurrentOperation, result);
 670             }
 671         }
 672
 673
 674
 675     }
 676
 677
 678     /**
 679      * Creates a new operation, as described by operationIntent.
 680      *
 681      * TODO - move to ServiceHandler (probably)
 682      *
 683      * @param operationIntent       Intent describing a new operation to queue and execute.
 684      * @return                      Pair with the new operation object and the information about its target server.
 685      */
 686     private Pair<Target , RemoteOperation> newOperation(Intent operationIntent) {
 687         RemoteOperation operation = null;
 688         Target target = null;
 689         try {
 690             if (!operationIntent.hasExtra(EXTRA_ACCOUNT) &&
 691                     !operationIntent.hasExtra(EXTRA_SERVER_URL)) {
 692                 Log_OC.e(TAG, "Not enough information provided in intent");
 693
 694             } else {
 695                 Account account = operationIntent.getParcelableExtra(EXTRA_ACCOUNT);
 696                 String serverUrl = operationIntent.getStringExtra(EXTRA_SERVER_URL);
 697                 String username = operationIntent.getStringExtra(EXTRA_USERNAME);
 698                 String password = operationIntent.getStringExtra(EXTRA_PASSWORD);
 699                 String authToken = operationIntent.getStringExtra(EXTRA_AUTH_TOKEN);
 700                 String cookie = operationIntent.getStringExtra(EXTRA_COOKIE);
 701                 target = new Target(
 702                         account,
 703                         (serverUrl == null) ? null : Uri.parse(serverUrl),
 704                         username,
 705                         password,
 706                         authToken,
 707                         cookie
 708                 );
 709
 710                 String action = operationIntent.getAction();
 711                 if (action.equals(ACTION_CREATE_SHARE)) {  // Create Share
 712                     String remotePath = operationIntent.getStringExtra(EXTRA_REMOTE_PATH);
 713                     Intent sendIntent = operationIntent.getParcelableExtra(EXTRA_SEND_INTENT);
 714                     if (remotePath.length() > 0) {
 715                         operation = new CreateShareOperation(OperationsService.this, remotePath, ShareType.PUBLIC_LINK,
 716                                 "", false, "", 1, sendIntent);
 717                     }
 718
 719                 } else if (action.equals(ACTION_UNSHARE)) {  // Unshare file
 720                     String remotePath = operationIntent.getStringExtra(EXTRA_REMOTE_PATH);
 721                     if (remotePath.length() > 0) {
 722                         operation = new UnshareLinkOperation(
 723                                 remotePath,
 724                                 OperationsService.this);
 725                     }
 726
 727                 } else if (action.equals(ACTION_GET_SERVER_INFO)) {
 728                     // check OC server and get basic information from it
 729                     operation = new GetServerInfoOperation(serverUrl, OperationsService.this);
 730
 731                 } else if (action.equals(ACTION_OAUTH2_GET_ACCESS_TOKEN)) {
 732                     /// GET ACCESS TOKEN to the OAuth server
 733                     String oauth2QueryParameters =
 734                             operationIntent.getStringExtra(EXTRA_OAUTH2_QUERY_PARAMETERS);
 735                     operation = new OAuth2GetAccessToken(
 736                             getString(R.string.oauth2_client_id),
 737                             getString(R.string.oauth2_redirect_uri),
 738                             getString(R.string.oauth2_grant_type),
 739                             oauth2QueryParameters);
 740
 741                 } else if (action.equals(ACTION_EXISTENCE_CHECK)) {
 742                     // Existence Check
 743                     String remotePath = operationIntent.getStringExtra(EXTRA_REMOTE_PATH);
 744                     boolean successIfAbsent = operationIntent.getBooleanExtra(EXTRA_SUCCESS_IF_ABSENT, false);
 745                     operation = new ExistenceCheckRemoteOperation(remotePath, OperationsService.this, successIfAbsent);
 746
 747                 } else if (action.equals(ACTION_GET_USER_NAME)) {
 748                     // Get User Name
 749                     operation = new GetRemoteUserNameOperation();
 750
 751                 } else if (action.equals(ACTION_RENAME)) {
 752                     // Rename file or folder
 753                     String remotePath = operationIntent.getStringExtra(EXTRA_REMOTE_PATH);
 754                     String newName = operationIntent.getStringExtra(EXTRA_NEWNAME);
 755                     operation = new RenameFileOperation(remotePath, newName);
 756
 757                 } else if (action.equals(ACTION_REMOVE)) {
 758                     // Remove file or folder
 759                     String remotePath = operationIntent.getStringExtra(EXTRA_REMOTE_PATH);
 760                     boolean onlyLocalCopy = operationIntent.getBooleanExtra(EXTRA_REMOVE_ONLY_LOCAL, false);
 761                     operation = new RemoveFileOperation(remotePath, onlyLocalCopy);
 762
 763                 } else if (action.equals(ACTION_CREATE_FOLDER)) {
 764                     // Create Folder
 765                     String remotePath = operationIntent.getStringExtra(EXTRA_REMOTE_PATH);
 766                     boolean createFullPath = operationIntent.getBooleanExtra(EXTRA_CREATE_FULL_PATH, true);
 767                     operation = new CreateFolderOperation(remotePath, createFullPath);
 768
 769                 } else if (action.equals(ACTION_SYNC_FILE)) {
 770                     // Sync file
 771                     String remotePath = operationIntent.getStringExtra(EXTRA_REMOTE_PATH);
 772                     boolean syncFileContents = operationIntent.getBooleanExtra(EXTRA_SYNC_FILE_CONTENTS, true);
 773                     operation = new SynchronizeFileOperation(
 774                             remotePath, account, syncFileContents, getApplicationContext()
 775                     );
 776
 777                 } else if (action.equals(ACTION_SYNC_FOLDER)) {
 778                     // Sync file
 779                     String remotePath = operationIntent.getStringExtra(EXTRA_REMOTE_PATH);
 780                     operation = new SynchronizeFolderOperation(
 781                             this,                       // TODO remove this dependency from construction time
 782                             remotePath,
 783                             account,
 784                             System.currentTimeMillis()  // TODO remove this dependency from construction time
 785                     );
 786
 787                 } else if (action.equals(ACTION_MOVE_FILE)) {
 788                     // Move file/folder
 789                     String remotePath = operationIntent.getStringExtra(EXTRA_REMOTE_PATH);
 790                     String newParentPath = operationIntent.getStringExtra(EXTRA_NEW_PARENT_PATH);
 791                     operation = new MoveFileOperation(remotePath,newParentPath,account);
 792                 }
 793
 794             }
 795
 796         } catch (IllegalArgumentException e) {
 797             Log_OC.e(TAG, "Bad information provided in intent: " + e.getMessage());
 798             operation = null;
 799         }
 800
 801         if (operation != null) {
 802             return new Pair<Target , RemoteOperation>(target, operation);
 803         } else {
 804             return null;
 805         }
 806     }
 807
 808
 809     /**
 810      * Sends a broadcast when a new operation is added to the queue.
 811      *
 812      * Local broadcasts are only delivered to activities in the same process, but can't be done sticky :\
 813      *
 814      * @param target            Account or URL pointing to an OC server.
 815      * @param operation         Added operation.
 816      */
 817     private void sendBroadcastNewOperation(Target target, RemoteOperation operation) {
 818         Intent intent = new Intent(ACTION_OPERATION_ADDED);
 819         if (target.mAccount != null) {
 820             intent.putExtra(EXTRA_ACCOUNT, target.mAccount);
 821         } else {
 822             intent.putExtra(EXTRA_SERVER_URL, target.mServerUrl);
 823         }
 824         //LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(this);
 825         //lbm.sendBroadcast(intent);
 826         sendStickyBroadcast(intent);
 827     }
 828
 829
 830     // TODO - maybe add a notification for real start of operations
 831
 832     /**
 833      * Sends a LOCAL broadcast when an operations finishes in order to the interested activities can update their view
 834      *
 835      * Local broadcasts are only delivered to activities in the same process.
 836      *
 837      * @param target            Account or URL pointing to an OC server.
 838      * @param operation         Finished operation.
 839      * @param result            Result of the operation.
 840      */
 841     private void sendBroadcastOperationFinished(Target target, RemoteOperation operation, RemoteOperationResult result) {
 842         Intent intent = new Intent(ACTION_OPERATION_FINISHED);
 843         intent.putExtra(EXTRA_RESULT, result);
 844         if (target.mAccount != null) {
 845             intent.putExtra(EXTRA_ACCOUNT, target.mAccount);
 846         } else {
 847             intent.putExtra(EXTRA_SERVER_URL, target.mServerUrl);
 848         }
 849         //LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(this);
 850         //lbm.sendBroadcast(intent);
 851         sendStickyBroadcast(intent);
 852     }
 853
 854
 855     /**
 856      * Notifies the currently subscribed listeners about the end of an operation.
 857      *
 858      * @param target            Account or URL pointing to an OC server.
 859      * @param operation         Finished operation.
 860      * @param result            Result of the operation.
 861      */
 862     private void dispatchResultToOperationListeners(
 863             Target target, final RemoteOperation operation, final RemoteOperationResult result) {
 864         int count = 0;
 865         Iterator<OnRemoteOperationListener> listeners = mOperationsBinder.mBoundListeners.keySet().iterator();
 866         while (listeners.hasNext()) {
 867             final OnRemoteOperationListener listener = listeners.next();
 868             final Handler handler = mOperationsBinder.mBoundListeners.get(listener);
 869             if (handler != null) {
 870                 handler.post(new Runnable() {
 871                     @Override
 872                     public void run() {
 873                         listener.onRemoteOperationFinish(operation, result);
 874                     }
 875                 });
 876                 count += 1;
 877             }
 878         }
 879         if (count == 0) {
 880             //mOperationResults.put(operation.hashCode(), result);
 881             Pair<RemoteOperation, RemoteOperationResult> undispatched =
 882                     new Pair<RemoteOperation, RemoteOperationResult>(operation, result);
 883             mUndispatchedFinishedOperations.put(operation.hashCode(), undispatched);
 884         }
 885         Log_OC.d(TAG, "Called " + count + " listeners");
 886     }
 887 }