OC-2459: Ask for pincode, when click on an instant upload notification
[pub/Android/ownCloud.git] / src / com / owncloud / android / operations / SynchronizeFolderOperation.java
index 823a36e..e93736c 100644 (file)
@@ -1,10 +1,9 @@
 /* ownCloud Android client application
 /* ownCloud Android client application
- *   Copyright (C) 2012 Bartek Przybylski
+ *   Copyright (C) 2012-2013 ownCloud Inc.
  *
  *   This program is free software: you can redistribute it and/or modify
  *
  *   This program is free software: you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation, either version 3 of the License, or
- *   (at your option) any later version.
+ *   it under the terms of the GNU General Public License version 2,
+ *   as published by the Free Software Foundation.
  *
  *   This program is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  *
  *   This program is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 
 package com.owncloud.android.operations;
 
 
 package com.owncloud.android.operations;
 
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
 import java.util.List;
+import java.util.Map;
 import java.util.Vector;
 
 import org.apache.http.HttpStatus;
 import java.util.Vector;
 
 import org.apache.http.HttpStatus;
-import org.apache.jackrabbit.webdav.MultiStatus;
+import org.apache.jackrabbit.webdav.DavConstants;
 import org.apache.jackrabbit.webdav.client.methods.PropFindMethod;
 
 import android.accounts.Account;
 import android.content.Context;
 import android.content.Intent;
 import org.apache.jackrabbit.webdav.client.methods.PropFindMethod;
 
 import android.accounts.Account;
 import android.content.Context;
 import android.content.Intent;
-import android.util.Log;
 
 
-import com.owncloud.android.datamodel.DataStorageManager;
+import com.owncloud.android.datamodel.FileDataStorageManager;
 import com.owncloud.android.datamodel.OCFile;
 import com.owncloud.android.datamodel.OCFile;
-import com.owncloud.android.files.services.FileDownloader;
-import com.owncloud.android.files.services.FileObserverService;
+import com.owncloud.android.oc_framework.network.webdav.WebdavClient;
+import com.owncloud.android.oc_framework.network.webdav.WebdavEntry;
+import com.owncloud.android.oc_framework.network.webdav.WebdavUtils;
+import com.owncloud.android.oc_framework.operations.RemoteOperation;
+import com.owncloud.android.oc_framework.operations.RemoteOperationResult;
+import com.owncloud.android.oc_framework.operations.RemoteOperationResult.ResultCode;
+import com.owncloud.android.oc_framework.operations.remote.ReadRemoteFolderOperation;
+import com.owncloud.android.oc_framework.operations.RemoteFile;
+import com.owncloud.android.syncadapter.FileSyncService;
+import com.owncloud.android.utils.FileStorageUtils;
+import com.owncloud.android.utils.Log_OC;
 
 
-import eu.alefzero.webdav.WebdavClient;
-import eu.alefzero.webdav.WebdavEntry;
-import eu.alefzero.webdav.WebdavUtils;
 
 
 /**
 
 
 /**
- * Remote operation performing the synchronization a the contents of a remote folder with the local database
+ *  Remote operation performing the synchronization of the list of files contained 
+ *  in a folder identified with its remote path.
+ *  
+ *  Fetches the list and properties of the files contained in the given folder, including their 
+ *  properties, and updates the local database with them.
+ *  
+ *  Does NOT enter in the child folders to synchronize their contents also.
  * 
  * 
- * @author David A. Velasco
+ *  @author David A. Velasco
  */
 public class SynchronizeFolderOperation extends RemoteOperation {
 
     private static final String TAG = SynchronizeFolderOperation.class.getSimpleName();
 
  */
 public class SynchronizeFolderOperation extends RemoteOperation {
 
     private static final String TAG = SynchronizeFolderOperation.class.getSimpleName();
 
-    /** Remote folder to synchronize */
-    private String mRemotePath;
     
     
-    /** Timestamp for the synchronization in progress */
+    /** Time stamp for the synchronization process in progress */
     private long mCurrentSyncTime;
     
     private long mCurrentSyncTime;
     
-    /** Id of the folder to synchronize in the local database */
-    private long mParentId;
+    /** Remote folder to synchronize */
+    private OCFile mLocalFolder;
     
     /** Access to the local database */
     
     /** Access to the local database */
-    private DataStorageManager mStorageManager;
+    private FileDataStorageManager mStorageManager;
     
     /** Account where the file to synchronize belongs */
     private Account mAccount;
     
     
     /** Account where the file to synchronize belongs */
     private Account mAccount;
     
-    /** Android context; necessary to send requests to the download service; maybe something to refactor */
+    /** Android context; necessary to send requests to the download service */
     private Context mContext;
     
     private Context mContext;
     
-    /** Files and folders contained in the synchronized folder */
+    /** Files and folders contained in the synchronized folder after a successful operation */
     private List<OCFile> mChildren;
     private List<OCFile> mChildren;
+
+    /** Counter of conflicts found between local and remote files */
+    private int mConflictsFound;
+
+    /** Counter of failed operations in synchronization of kept-in-sync files */
+    private int mFailsInFavouritesFound;
+
+    /** Map of remote and local paths to files that where locally stored in a location out of the ownCloud folder and couldn't be copied automatically into it */
+    private Map<String, String> mForgottenLocalFiles;
+
+    /** 'True' means that this operation is part of a full account synchronization */ 
+    private boolean mSyncFullAccount;
+
+    /** 'True' means that the remote folder changed from last synchronization and should be fetched */
+    private boolean mRemoteFolderChanged;
     
     
     
     
-    public SynchronizeFolderOperation(  String remotePath, 
+    /**
+     * Creates a new instance of {@link SynchronizeFolderOperation}.
+     * 
+     * @param   remoteFolderPath        Remote folder to synchronize.
+     * @param   currentSyncTime         Time stamp for the synchronization process in progress.
+     * @param   localFolderId           Identifier in the local database of the folder to synchronize.
+     * @param   updateFolderProperties  'True' means that the properties of the folder should be updated also, not just its content.
+     * @param   syncFullAccount         'True' means that this operation is part of a full account synchronization.
+     * @param   dataStorageManager      Interface with the local database.
+     * @param   account                 ownCloud account where the folder is located. 
+     * @param   context                 Application context.
+     */
+    public SynchronizeFolderOperation(  OCFile folder, 
                                         long currentSyncTime, 
                                         long currentSyncTime, 
-                                        long parentId, 
-                                        DataStorageManager dataStorageManager, 
+                                        boolean syncFullAccount,
+                                        FileDataStorageManager dataStorageManager, 
                                         Account account, 
                                         Context context ) {
                                         Account account, 
                                         Context context ) {
-        mRemotePath = remotePath;
+        mLocalFolder = folder;
         mCurrentSyncTime = currentSyncTime;
         mCurrentSyncTime = currentSyncTime;
-        mParentId = parentId;
+        mSyncFullAccount = syncFullAccount;
         mStorageManager = dataStorageManager;
         mAccount = account;
         mContext = context;
         mStorageManager = dataStorageManager;
         mAccount = account;
         mContext = context;
+        mForgottenLocalFiles = new HashMap<String, String>();
+        mRemoteFolderChanged = false;
+    }
+    
+    
+    public int getConflictsFound() {
+        return mConflictsFound;
     }
     
     }
     
+    public int getFailsInFavouritesFound() {
+        return mFailsInFavouritesFound;
+    }
+    
+    public Map<String, String> getForgottenLocalFiles() {
+        return mForgottenLocalFiles;
+    }
     
     /**
      * Returns the list of files and folders contained in the synchronized folder, if called after synchronization is complete.
      * 
     
     /**
      * Returns the list of files and folders contained in the synchronized folder, if called after synchronization is complete.
      * 
-     * @return      List of files and folders contained in the synchronized folder.
+     * @return  List of files and folders contained in the synchronized folder.
      */
     public List<OCFile> getChildren() {
         return mChildren;
     }
     
      */
     public List<OCFile> getChildren() {
         return mChildren;
     }
     
-    
+    /**
+     * Performs the synchronization.
+     * 
+     * {@inheritDoc}
+     */
     @Override
     protected RemoteOperationResult run(WebdavClient client) {
         RemoteOperationResult result = null;
     @Override
     protected RemoteOperationResult run(WebdavClient client) {
         RemoteOperationResult result = null;
+        mFailsInFavouritesFound = 0;
+        mConflictsFound = 0;
+        mForgottenLocalFiles.clear();
         
         
-        // code before in FileSyncAdapter.fetchData
+        result = checkForChanges(client);
+        
+        if (result.isSuccess()) {
+            if (mRemoteFolderChanged) {
+                result = fetchAndSyncRemoteFolder(client);
+            } else {
+                mChildren = mStorageManager.getFolderContent(mLocalFolder);
+            }
+        }
+        
+        if (!mSyncFullAccount) {            
+            sendStickyBroadcast(false, mLocalFolder.getRemotePath(), result);
+        }
+
+        return result;
+        
+    }
+
+
+    private RemoteOperationResult checkForChanges(WebdavClient client) {
+        mRemoteFolderChanged = false;
+        RemoteOperationResult result = null;
+        String remotePath = null;
         PropFindMethod query = null;
         PropFindMethod query = null;
+        
         try {
         try {
-            Log.d(TAG, "Synchronizing " + mAccount.name + ", fetching files in " + mRemotePath);
-            
+            remotePath = mLocalFolder.getRemotePath();
+            Log_OC.d(TAG, "Checking changes in " + mAccount.name + remotePath);
+
             // remote request 
             // remote request 
-            query = new PropFindMethod(client.getBaseUri() + WebdavUtils.encodePath(mRemotePath));
+            query = new PropFindMethod(client.getBaseUri() + WebdavUtils.encodePath(remotePath),
+                    DavConstants.PROPFIND_ALL_PROP,
+                    DavConstants.DEPTH_0);
             int status = client.executeMethod(query);
             int status = client.executeMethod(query);
-            
-            // check and process response   - /// TODO take into account all the possible status per child-resource
-            if (isMultiStatus(status)) { 
-                MultiStatus resp = query.getResponseBodyAsMultiStatus();
-            
-                // synchronize properties of the parent folder, if necessary
-                if (mParentId == DataStorageManager.ROOT_PARENT_ID) {
-                    WebdavEntry we = new WebdavEntry(resp.getResponses()[0], client.getBaseUri().getPath());
-                    OCFile parent = fillOCFile(we);
-                    parent.setParentId(mParentId);
-                    mStorageManager.saveFile(parent);
-                    mParentId = parent.getFileId();
-                }
-                
-                // read contents in folder
-                List<OCFile> updatedFiles = new Vector<OCFile>(resp.getResponses().length - 1);
-                for (int i = 1; i < resp.getResponses().length; ++i) {
-                    WebdavEntry we = new WebdavEntry(resp.getResponses()[i], client.getBaseUri().getPath());
-                    OCFile file = fillOCFile(we);
-                    file.setParentId(mParentId);
-                    OCFile oldFile = mStorageManager.getFileByPath(file.getRemotePath());
-                    if (oldFile != null) {
-                        if (oldFile.keepInSync() && file.getModificationTimestamp() > oldFile.getModificationTimestamp()) {
-                            disableObservance(file);        // first disable observer so we won't get file upload right after download
-                            requestContentDownload(file);
-                        }
-                        file.setKeepInSync(oldFile.keepInSync());
-                    }
-                
-                    updatedFiles.add(file);
-                }
-                                
-                // save updated contents in local database; all at once, trying to get a best performance in database update (not a big deal, indeed)
-                mStorageManager.saveFiles(updatedFiles);
 
 
+            // check and process response
+            if (isMultiStatus(status)) {
+                // parse data from remote folder 
+                WebdavEntry we = new WebdavEntry(query.getResponseBodyAsMultiStatus().getResponses()[0], client.getBaseUri().getPath());
+                OCFile remoteFolder = fillOCFile(we);
                 
                 
-                // removal of obsolete files
-                mChildren = mStorageManager.getDirectoryContent(mStorageManager.getFileById(mParentId));
-                OCFile file;
-                String currentSavePath = FileDownloader.getSavePath(mAccount.name);
-                for (int i=0; i < mChildren.size(); ) {
-                    file = mChildren.get(i);
-                    if (file.getLastSyncDate() != mCurrentSyncTime) {
-                        Log.d(TAG, "removing file: " + file);
-                        mStorageManager.removeFile(file, (file.isDown() && file.getStoragePath().startsWith(currentSavePath)));
-                        mChildren.remove(i);
-                    } else {
-                        i++;
-                    }
-                }
+                // check if remote and local folder are different
+                mRemoteFolderChanged = !(remoteFolder.getEtag().equalsIgnoreCase(mLocalFolder.getEtag()));
+                
+                result = new RemoteOperationResult(ResultCode.OK);
                 
             } else {
                 
             } else {
+                // check failed
                 client.exhaustResponse(query.getResponseBodyAsStream());
                 client.exhaustResponse(query.getResponseBodyAsStream());
+                if (status == HttpStatus.SC_NOT_FOUND) {
+                    removeLocalFolder();
+                }
+                result = new RemoteOperationResult(false, status, query.getResponseHeaders());
             }
             }
-            
-            // prepare result object
-            result = new RemoteOperationResult(isMultiStatus(status), status);
-            Log.i(TAG, "Synchronizing " + mAccount.name + ", folder " + mRemotePath + ": " + result.getLogMessage());
-            
-            
+
         } catch (Exception e) {
             result = new RemoteOperationResult(e);
         } catch (Exception e) {
             result = new RemoteOperationResult(e);
-            Log.e(TAG, "Synchronizing " + mAccount.name + ", folder " + mRemotePath + ": " + result.getLogMessage(), result.getException());
+            
 
         } finally {
             if (query != null)
                 query.releaseConnection();  // let the connection available for other methods
 
         } finally {
             if (query != null)
                 query.releaseConnection();  // let the connection available for other methods
+            if (result.isSuccess()) {
+                Log_OC.i(TAG, "Checked " + mAccount.name + remotePath + " : " + (mRemoteFolderChanged ? "changed" : "not changed"));
+            } else {
+                if (result.isException()) {
+                    Log_OC.e(TAG, "Checked " + mAccount.name + remotePath  + " : " + result.getLogMessage(), result.getException());
+                } else {
+                    Log_OC.e(TAG, "Checked " + mAccount.name + remotePath + " : " + result.getLogMessage());
+                }
+            }
+            
+        }
+        return result;
+    }
+
+
+    private RemoteOperationResult fetchAndSyncRemoteFolder(WebdavClient client) {
+        String remotePath = mLocalFolder.getRemotePath();
+        ReadRemoteFolderOperation operation = new ReadRemoteFolderOperation(remotePath);
+        RemoteOperationResult result = operation.execute(client);
+        Log_OC.d(TAG, "Synchronizing " + mAccount.name + remotePath);
+        
+        if (result.isSuccess()) {
+            synchronizeData(result.getData(), client);
+            if (mConflictsFound > 0  || mFailsInFavouritesFound > 0) { 
+                result = new RemoteOperationResult(ResultCode.SYNC_CONFLICT);   // should be different result, but will do the job
+            }
+        } else {
+            if (result.getCode() == ResultCode.FILE_NOT_FOUND)
+                removeLocalFolder();
         }
         
         return result;
     }
         }
         
         return result;
     }
+
     
     
+    private void removeLocalFolder() {
+        if (mStorageManager.fileExists(mLocalFolder.getFileId())) {
+            String currentSavePath = FileStorageUtils.getSavePath(mAccount.name);
+            mStorageManager.removeFolder(mLocalFolder, true, (mLocalFolder.isDown() && mLocalFolder.getStoragePath().startsWith(currentSavePath)));
+        }
+    }
+
+
+    /**
+     *  Synchronizes the data retrieved from the server about the contents of the target folder 
+     *  with the current data in the local database.
+     *  
+     *  Grants that mChildren is updated with fresh data after execution.
+     *  
+     *  @param folderAndFiles   Remote folder and children files in Folder 
+     *  
+     *  @param client           Client instance to the remote server where the data were 
+     *                          retrieved.  
+     *  @return                 'True' when any change was made in the local data, 'false' otherwise.
+     */
+    private void synchronizeData(ArrayList<RemoteFile> folderAndFiles, WebdavClient client) {
+        // get 'fresh data' from the database
+        mLocalFolder = mStorageManager.getFileByPath(mLocalFolder.getRemotePath());
+        
+        // parse data from remote folder 
+        OCFile remoteFolder = fillOCFile(folderAndFiles.get(0));
+        remoteFolder.setParentId(mLocalFolder.getParentId());
+        remoteFolder.setFileId(mLocalFolder.getFileId());
+        
+        Log_OC.d(TAG, "Remote folder " + mLocalFolder.getRemotePath() + " changed - starting update of local data ");
+        
+        List<OCFile> updatedFiles = new Vector<OCFile>(folderAndFiles.size() - 1);
+        List<SynchronizeFileOperation> filesToSyncContents = new Vector<SynchronizeFileOperation>();
+
+        // get current data about local contents of the folder to synchronize
+        List<OCFile> localFiles = mStorageManager.getFolderContent(mLocalFolder);
+        Map<String, OCFile> localFilesMap = new HashMap<String, OCFile>(localFiles.size());
+        for (OCFile file : localFiles) {
+            localFilesMap.put(file.getRemotePath(), file);
+        }
+        
+        // loop to update every child
+        OCFile remoteFile = null, localFile = null;
+        for (int i=1; i<folderAndFiles.size(); i++) {
+            /// new OCFile instance with the data from the server
+            remoteFile = fillOCFile(folderAndFiles.get(i));
+            remoteFile.setParentId(mLocalFolder.getFileId());
+
+            /// retrieve local data for the read file 
+            //localFile = mStorageManager.getFileByPath(remoteFile.getRemotePath());
+            localFile = localFilesMap.remove(remoteFile.getRemotePath());
+            
+            /// add to the remoteFile (the new one) data about LOCAL STATE (not existing in the server side)
+            remoteFile.setLastSyncDateForProperties(mCurrentSyncTime);
+            if (localFile != null) {
+                // some properties of local state are kept unmodified
+                remoteFile.setFileId(localFile.getFileId());
+                remoteFile.setKeepInSync(localFile.keepInSync());
+                remoteFile.setLastSyncDateForData(localFile.getLastSyncDateForData());
+                remoteFile.setModificationTimestampAtLastSyncForData(localFile.getModificationTimestampAtLastSyncForData());
+                remoteFile.setStoragePath(localFile.getStoragePath());
+                remoteFile.setEtag(localFile.getEtag());    // eTag will not be updated unless contents are synchronized (Synchronize[File|Folder]Operation with remoteFile as parameter)
+                if (remoteFile.isFolder()) {
+                    remoteFile.setFileLength(localFile.getFileLength()); // TODO move operations about size of folders to FileContentProvider
+                }
+            } else {
+                remoteFile.setEtag(""); // remote eTag will not be updated unless contents are synchronized (Synchronize[File|Folder]Operation with remoteFile as parameter)
+            }
+
+            /// check and fix, if needed, local storage path
+            checkAndFixForeignStoragePath(remoteFile);      // fixing old policy - now local files must be copied into the ownCloud local folder 
+            searchForLocalFileInDefaultPath(remoteFile);    // legacy   
+
+            /// prepare content synchronization for kept-in-sync files
+            if (remoteFile.keepInSync()) {
+                SynchronizeFileOperation operation = new SynchronizeFileOperation(  localFile,        
+                                                                                    remoteFile, 
+                                                                                    mStorageManager,
+                                                                                    mAccount,       
+                                                                                    true, 
+                                                                                    mContext
+                                                                                    );
+                filesToSyncContents.add(operation);
+            }
+            
+            updatedFiles.add(remoteFile);
+        }
+
+        // save updated contents in local database; all at once, trying to get a best performance in database update (not a big deal, indeed)
+        mStorageManager.saveFolder(remoteFolder, updatedFiles, localFilesMap.values());
+
+        // request for the synchronization of file contents AFTER saving current remote properties
+        startContentSynchronizations(filesToSyncContents, client);
+
+        // removal of obsolete files
+        //removeObsoleteFiles();
+       
+        // must be done AFTER saving all the children information, so that eTag is not updated in the database in case of unexpected exceptions
+        //mStorageManager.saveFile(remoteFolder);
+        mChildren = updatedFiles;
+        
+    }
+
+    /**
+     * Performs a list of synchronization operations, determining if a download or upload is needed or
+     * if exists conflict due to changes both in local and remote contents of the each file.
+     * 
+     * If download or upload is needed, request the operation to the corresponding service and goes on.
+     * 
+     * @param filesToSyncContents       Synchronization operations to execute.
+     * @param client                    Interface to the remote ownCloud server.
+     */
+    private void startContentSynchronizations(List<SynchronizeFileOperation> filesToSyncContents, WebdavClient client) {
+        RemoteOperationResult contentsResult = null;
+        for (SynchronizeFileOperation op: filesToSyncContents) {
+            contentsResult = op.execute(client);   // returns without waiting for upload or download finishes
+            if (!contentsResult.isSuccess()) {
+                if (contentsResult.getCode() == ResultCode.SYNC_CONFLICT) {
+                    mConflictsFound++;
+                } else {
+                    mFailsInFavouritesFound++;
+                    if (contentsResult.getException() != null) {
+                        Log_OC.e(TAG, "Error while synchronizing favourites : " +  contentsResult.getLogMessage(), contentsResult.getException());
+                    } else {
+                        Log_OC.e(TAG, "Error while synchronizing favourites : " + contentsResult.getLogMessage());
+                    }
+                }
+            }   // won't let these fails break the synchronization process
+        }
+    }
+
 
     public boolean isMultiStatus(int status) {
         return (status == HttpStatus.SC_MULTI_STATUS); 
     }
 
 
     public boolean isMultiStatus(int status) {
         return (status == HttpStatus.SC_MULTI_STATUS); 
     }
 
-
+    
     /**
      * Creates and populates a new {@link OCFile} object with the data read from the server.
      * 
     /**
      * Creates and populates a new {@link OCFile} object with the data read from the server.
      * 
@@ -197,38 +410,131 @@ public class SynchronizeFolderOperation extends RemoteOperation {
         file.setCreationTimestamp(we.createTimestamp());
         file.setFileLength(we.contentLength());
         file.setMimetype(we.contentType());
         file.setCreationTimestamp(we.createTimestamp());
         file.setFileLength(we.contentLength());
         file.setMimetype(we.contentType());
-        file.setModificationTimestamp(we.modifiedTimesamp());
-        file.setLastSyncDate(mCurrentSyncTime);
+        file.setModificationTimestamp(we.modifiedTimestamp());
+        file.setEtag(we.etag());
+        return file;
+    }
+
+    /**
+     * Creates and populates a new {@link OCFile} object with the data read from the server.
+     * 
+     * @param remote    remote file read from the server (remote file or folder).
+     * @return          New OCFile instance representing the remote resource described by we.
+     */
+    private OCFile fillOCFile(RemoteFile remote) {
+        OCFile file = new OCFile(remote.getRemotePath());
+        file.setCreationTimestamp(remote.getCreationTimestamp());
+        file.setFileLength(remote.getLength());
+        file.setMimetype(remote.getMimeType());
+        file.setModificationTimestamp(remote.getModifiedTimestamp());
+        file.setEtag(remote.getEtag());
         return file;
     }
     
         return file;
     }
     
-    
+
     /**
     /**
-     * Request to stop the observance of local updates for a file.  
+     * Checks the storage path of the OCFile received as parameter. If it's out of the local ownCloud folder,
+     * tries to copy the file inside it. 
      * 
      * 
-     * @param file      OCFile representing the remote file to stop to monitor for local updates
+     * If the copy fails, the link to the local file is nullified. The account of forgotten files is kept in 
+     * {@link #mForgottenLocalFiles}
+     *) 
+     * @param file      File to check and fix.
      */
      */
-    private void disableObservance(OCFile file) {
-        Log.d(TAG, "Disabling observation of remote file" + file.getRemotePath());
-        Intent intent = new Intent(mContext, FileObserverService.class);
-        intent.putExtra(FileObserverService.KEY_FILE_CMD, FileObserverService.CMD_ADD_DOWNLOADING_FILE);
-        intent.putExtra(FileObserverService.KEY_CMD_ARG, file.getRemotePath());
-        mContext.startService(intent);
-        
+    private void checkAndFixForeignStoragePath(OCFile file) {
+        String storagePath = file.getStoragePath();
+        String expectedPath = FileStorageUtils.getDefaultSavePathFor(mAccount.name, file);
+        if (storagePath != null && !storagePath.equals(expectedPath)) {
+            /// fix storagePaths out of the local ownCloud folder
+            File originalFile = new File(storagePath);
+            if (FileStorageUtils.getUsableSpace(mAccount.name) < originalFile.length()) {
+                mForgottenLocalFiles.put(file.getRemotePath(), storagePath);
+                file.setStoragePath(null);
+                    
+            } else {
+                InputStream in = null;
+                OutputStream out = null;
+                try {
+                    File expectedFile = new File(expectedPath);
+                    File expectedParent = expectedFile.getParentFile();
+                    expectedParent.mkdirs();
+                    if (!expectedParent.isDirectory()) {
+                        throw new IOException("Unexpected error: parent directory could not be created");
+                    }
+                    expectedFile.createNewFile();
+                    if (!expectedFile.isFile()) {
+                        throw new IOException("Unexpected error: target file could not be created");
+                    }                    
+                    in = new FileInputStream(originalFile);
+                    out = new FileOutputStream(expectedFile);
+                    byte[] buf = new byte[1024];
+                    int len;
+                    while ((len = in.read(buf)) > 0){
+                        out.write(buf, 0, len);
+                    }
+                    file.setStoragePath(expectedPath);
+                    
+                } catch (Exception e) {
+                    Log_OC.e(TAG, "Exception while copying foreign file " + expectedPath, e);
+                    mForgottenLocalFiles.put(file.getRemotePath(), storagePath);
+                    file.setStoragePath(null);
+                    
+                } finally {
+                    try {
+                        if (in != null) in.close();
+                    } catch (Exception e) {
+                        Log_OC.d(TAG, "Weird exception while closing input stream for " + storagePath + " (ignoring)", e);
+                    }
+                    try {
+                        if (out != null) out.close();
+                    } catch (Exception e) {
+                        Log_OC.d(TAG, "Weird exception while closing output stream for " + expectedPath + " (ignoring)", e);
+                    }
+                }
+            }
+        }
     }
 
     }
 
+    /**
+     * Scans the default location for saving local copies of files searching for
+     * a 'lost' file with the same full name as the {@link OCFile} received as 
+     * parameter.
+     *  
+     * @param file      File to associate a possible 'lost' local file.
+     */
+    private void searchForLocalFileInDefaultPath(OCFile file) {
+        if (file.getStoragePath() == null && !file.isFolder()) {
+            File f = new File(FileStorageUtils.getDefaultSavePathFor(mAccount.name, file));
+            if (f.exists()) {
+                file.setStoragePath(f.getAbsolutePath());
+                file.setLastSyncDateForData(f.lastModified());
+            }
+        }
+    }
 
 
-    /** 
-     * Requests a download to the file download service
+    
+    /**
+     * Sends a message to any application component interested in the progress of the synchronization.
      * 
      * 
-     * @param   file    OCFile representing the remote file to download
+     * @param inProgress        'True' when the synchronization progress is not finished.
+     * @param dirRemotePath     Remote path of a folder that was just synchronized (with or without success)
      */
      */
-    private void requestContentDownload(OCFile file) {
-        Intent intent = new Intent(mContext, FileDownloader.class);
-        intent.putExtra(FileDownloader.EXTRA_ACCOUNT, mAccount);
-        intent.putExtra(FileDownloader.EXTRA_FILE, file);
-        mContext.startService(intent);
+    private void sendStickyBroadcast(boolean inProgress, String dirRemotePath, RemoteOperationResult result) {
+        Intent i = new Intent(FileSyncService.getSyncMessage());
+        i.putExtra(FileSyncService.IN_PROGRESS, inProgress);
+        i.putExtra(FileSyncService.ACCOUNT_NAME, mAccount.name);
+        if (dirRemotePath != null) {
+            i.putExtra(FileSyncService.SYNC_FOLDER_REMOTE_PATH, dirRemotePath);
+        }
+        if (result != null) {
+            i.putExtra(FileSyncService.SYNC_RESULT, result);
+        }
+        mContext.sendStickyBroadcast(i);
     }
 
 
     }
 
 
+    public boolean getRemoteFolderChanged() {
+        return mRemoteFolderChanged;
+    }
+
 }
 }