src/com/owncloud/android/operations/RenameFileOperation.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.operations;
  19
  20 import java.io.File;
  21 import java.io.IOException;
  22
  23 import com.owncloud.android.datamodel.OCFile;
  24 import com.owncloud.android.lib.common.OwnCloudClient;
  25 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  26 import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
  27 import com.owncloud.android.lib.common.utils.Log_OC;
  28 import com.owncloud.android.lib.resources.files.RenameRemoteFileOperation;
  29 import com.owncloud.android.operations.common.SyncOperation;
  30 import com.owncloud.android.utils.FileStorageUtils;
  31
  32
  33 /**
  34  * Remote operation performing the rename of a remote file (or folder?) in the ownCloud server.
  35  *
  36  * @author David A. Velasco
  37  * @author masensio
  38  */
  39 public class RenameFileOperation extends SyncOperation {
  40
  41     private static final String TAG = RenameFileOperation.class.getSimpleName();
  42
  43     private OCFile mFile;
  44     private String mRemotePath;
  45     private String mNewName;
  46     private String mNewRemotePath;
  47
  48
  49
  50     /**
  51      * Constructor
  52      *
  53      * @param remotePath            RemotePath of the OCFile instance describing the remote file or folder to rename
  54      * @param account               OwnCloud account containing the remote file
  55      * @param newName               New name to set as the name of file.
  56      */
  57     public RenameFileOperation(String remotePath, String newName) {
  58         mRemotePath = remotePath;
  59         mNewName = newName;
  60         mNewRemotePath = null;
  61     }
  62
  63     public OCFile getFile() {
  64         return mFile;
  65     }
  66
  67
  68     /**
  69      * Performs the rename operation.
  70      *
  71      * @param   client      Client object to communicate with the remote ownCloud server.
  72      */
  73     @Override
  74     protected RemoteOperationResult run(OwnCloudClient client) {
  75         RemoteOperationResult result = null;
  76
  77         mFile = getStorageManager().getFileByPath(mRemotePath);
  78
  79         // check if the new name is valid in the local file system
  80         try {
  81             if (!isValidNewName()) {
  82                 return new RemoteOperationResult(ResultCode.INVALID_LOCAL_FILE_NAME);
  83             }
  84             String parent = (new File(mFile.getRemotePath())).getParent();
  85             parent = (parent.endsWith(OCFile.PATH_SEPARATOR)) ? parent : parent + OCFile.PATH_SEPARATOR;
  86             mNewRemotePath =  parent + mNewName;
  87             if (mFile.isFolder()) {
  88                 mNewRemotePath += OCFile.PATH_SEPARATOR;
  89             }
  90
  91             // check local overwrite
  92             if (getStorageManager().getFileByPath(mNewRemotePath) != null) {
  93                 return new RemoteOperationResult(ResultCode.INVALID_OVERWRITE);
  94             }
  95
  96             RenameRemoteFileOperation operation = new RenameRemoteFileOperation(mFile.getFileName(), mFile.getRemotePath(),
  97                     mNewName, mFile.isFolder());
  98             result = operation.execute(client);
  99
 100             if (result.isSuccess()) {
 101                 if (mFile.isFolder()) {
 102                     getStorageManager().moveLocalFile(mFile, mNewRemotePath, parent);
 103                     //saveLocalDirectory();
 104
 105                 } else {
 106                     saveLocalFile();
 107                 }
 108             }
 109
 110         } catch (IOException e) {
 111             Log_OC.e(TAG, "Rename " + mFile.getRemotePath() + " to " + ((mNewRemotePath==null) ? mNewName : mNewRemotePath) + ": " +
 112                     ((result!= null) ? result.getLogMessage() : ""), e);
 113         }
 114
 115         return result;
 116     }
 117
 118     private void saveLocalFile() {
 119         mFile.setFileName(mNewName);
 120
 121         // try to rename the local copy of the file
 122         if (mFile.isDown()) {
 123             String oldPath = mFile.getStoragePath();
 124             File f = new File(oldPath);
 125             String parentStoragePath = f.getParent();
 126             if (!parentStoragePath.endsWith(File.separator))
 127                 parentStoragePath += File.separator;
 128             if (f.renameTo(new File(parentStoragePath + mNewName))) {
 129                 String newPath = parentStoragePath + mNewName;
 130                 mFile.setStoragePath(newPath);
 131
 132                 // notify MediaScanner about removed file - TODO really works?
 133                 getStorageManager().triggerMediaScan(oldPath);
 134                 // notify to scan about new file
 135                 getStorageManager().triggerMediaScan(newPath);
 136             }
 137             // else - NOTHING: the link to the local file is kept although the local name can't be updated
 138             // TODO - study conditions when this could be a problem
 139         }
 140
 141         getStorageManager().saveFile(mFile);
 142     }
 143
 144     /**
 145      * Checks if the new name to set is valid in the file system
 146      *
 147      * The only way to be sure is trying to create a file with that name. It's made in the temporal directory
 148      * for downloads, out of any account, and then removed.
 149      *
 150      * IMPORTANT: The test must be made in the same file system where files are download. The internal storage
 151      * could be formatted with a different file system.
 152      *
 153      * TODO move this method, and maybe FileDownload.get***Path(), to a class with utilities specific for the interactions with the file system
 154      *
 155      * @return              'True' if a temporal file named with the name to set could be created in the file system where
 156      *                      local files are stored.
 157      * @throws IOException  When the temporal folder can not be created.
 158      */
 159     private boolean isValidNewName() throws IOException {
 160         // check tricky names
 161         if (mNewName == null || mNewName.length() <= 0 || mNewName.contains(File.separator)) {
 162             return false;
 163         }
 164         // create a test file
 165         String tmpFolderName = FileStorageUtils.getTemporalPath("");
 166         File testFile = new File(tmpFolderName + mNewName);
 167         File tmpFolder = testFile.getParentFile();
 168         tmpFolder.mkdirs();
 169         if (!tmpFolder.isDirectory()) {
 170             throw new IOException("Unexpected error: temporal directory could not be created");
 171         }
 172         try {
 173             testFile.createNewFile();   // return value is ignored; it could be 'false' because the file already existed, that doesn't invalidate the name
 174         } catch (IOException e) {
 175             Log_OC.i(TAG, "Test for validity of name " + mNewName + " in the file system failed");
 176             return false;
 177         }
 178         boolean result = (testFile.exists() && testFile.isFile());
 179
 180         // cleaning ; result is ignored, since there is not much we could do in case of failure, but repeat and repeat...
 181         testFile.delete();
 182
 183         return result;
 184     }
 185
 186 }