src/com/owncloud/android/operations/RenameFileOperation.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012-2013 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.FileDataStorageManager;
  24 import com.owncloud.android.datamodel.OCFile;
  25 import com.owncloud.android.oc_framework.network.webdav.WebdavClient;
  26 import com.owncloud.android.oc_framework.operations.RemoteOperation;
  27 import com.owncloud.android.oc_framework.operations.RemoteOperationResult;
  28 import com.owncloud.android.oc_framework.operations.RemoteOperationResult.ResultCode;
  29 import com.owncloud.android.oc_framework.operations.remote.RenameRemoteFileOperation;
  30 import com.owncloud.android.utils.FileStorageUtils;
  31 import com.owncloud.android.utils.Log_OC;
  32
  33 import android.accounts.Account;
  34
  35
  36 /**
  37  * Remote operation performing the rename of a remote file (or folder?) in the ownCloud server.
  38  *
  39  * @author David A. Velasco
  40  */
  41 public class RenameFileOperation extends RemoteOperation {
  42
  43     private static final String TAG = RenameFileOperation.class.getSimpleName();
  44
  45
  46     private OCFile mFile;
  47     private Account mAccount;
  48     private String mNewName;
  49     private String mNewRemotePath;
  50     private FileDataStorageManager mStorageManager;
  51
  52
  53     /**
  54      * Constructor
  55      *
  56      * @param file                  OCFile instance describing the remote file or folder to rename
  57      * @param account               OwnCloud account containing the remote file
  58      * @param newName               New name to set as the name of file.
  59      * @param storageManager        Reference to the local database corresponding to the account where the file is contained.
  60      */
  61     public RenameFileOperation(OCFile file, Account account, String newName, FileDataStorageManager storageManager) {
  62         mFile = file;
  63         mAccount = account;
  64         mNewName = newName;
  65         mNewRemotePath = null;
  66         mStorageManager = storageManager;
  67     }
  68
  69     public OCFile getFile() {
  70         return mFile;
  71     }
  72
  73
  74     /**
  75      * Performs the rename operation.
  76      *
  77      * @param   client      Client object to communicate with the remote ownCloud server.
  78      */
  79     @Override
  80     protected RemoteOperationResult run(WebdavClient client) {
  81         RemoteOperationResult result = null;
  82
  83         // check if the new name is valid in the local file system
  84         try {
  85             if (!isValidNewName()) {
  86                 return new RemoteOperationResult(ResultCode.INVALID_LOCAL_FILE_NAME);
  87             }
  88             String parent = (new File(mFile.getRemotePath())).getParent();
  89             parent = (parent.endsWith(OCFile.PATH_SEPARATOR)) ? parent : parent + OCFile.PATH_SEPARATOR;
  90             mNewRemotePath =  parent + mNewName;
  91             if (mFile.isFolder()) {
  92                 mNewRemotePath += OCFile.PATH_SEPARATOR;
  93             }
  94
  95             // ckeck local overwrite
  96             if (mStorageManager.getFileByPath(mNewRemotePath) != null) {
  97                 return new RemoteOperationResult(ResultCode.INVALID_OVERWRITE);
  98             }
  99
 100             RenameRemoteFileOperation operation = new RenameRemoteFileOperation(mFile.getFileName(), mFile.getRemotePath(),
 101                     mNewName, mFile.isFolder());
 102             result = operation.execute(client);
 103
 104             if (result.isSuccess()) {
 105                 if (mFile.isFolder()) {
 106                     saveLocalDirectory();
 107
 108                 } else {
 109                     saveLocalFile();
 110                 }
 111             }
 112
 113         } catch (IOException e) {
 114             Log_OC.e(TAG, "Rename " + mFile.getRemotePath() + " to " + ((mNewRemotePath==null) ? mNewName : mNewRemotePath) + ": " +
 115                     ((result!= null) ? result.getLogMessage() : ""), e);
 116         }
 117
 118         return result;
 119     }
 120
 121
 122     private void saveLocalDirectory() {
 123         mStorageManager.moveFolder(mFile, mNewRemotePath);
 124         String localPath = FileStorageUtils.getDefaultSavePathFor(mAccount.name, mFile);
 125         File localDir = new File(localPath);
 126         if (localDir.exists()) {
 127             localDir.renameTo(new File(FileStorageUtils.getSavePath(mAccount.name) + mNewRemotePath));
 128             // TODO - if renameTo fails, children files that are already down will result unlinked
 129         }
 130     }
 131
 132     private void saveLocalFile() {
 133         mFile.setFileName(mNewName);
 134
 135         // try to rename the local copy of the file
 136         if (mFile.isDown()) {
 137             File f = new File(mFile.getStoragePath());
 138             String parentStoragePath = f.getParent();
 139             if (!parentStoragePath.endsWith(File.separator))
 140                 parentStoragePath += File.separator;
 141             if (f.renameTo(new File(parentStoragePath + mNewName))) {
 142                 mFile.setStoragePath(parentStoragePath + mNewName);
 143             }
 144             // else - NOTHING: the link to the local file is kept although the local name can't be updated
 145             // TODO - study conditions when this could be a problem
 146         }
 147
 148         mStorageManager.saveFile(mFile);
 149     }
 150
 151     /**
 152      * Checks if the new name to set is valid in the file system
 153      *
 154      * The only way to be sure is trying to create a file with that name. It's made in the temporal directory
 155      * for downloads, out of any account, and then removed.
 156      *
 157      * IMPORTANT: The test must be made in the same file system where files are download. The internal storage
 158      * could be formatted with a different file system.
 159      *
 160      * TODO move this method, and maybe FileDownload.get***Path(), to a class with utilities specific for the interactions with the file system
 161      *
 162      * @return              'True' if a temporal file named with the name to set could be created in the file system where
 163      *                      local files are stored.
 164      * @throws IOException  When the temporal folder can not be created.
 165      */
 166     private boolean isValidNewName() throws IOException {
 167         // check tricky names
 168         if (mNewName == null || mNewName.length() <= 0 || mNewName.contains(File.separator) || mNewName.contains("%")) {
 169             return false;
 170         }
 171         // create a test file
 172         String tmpFolderName = FileStorageUtils.getTemporalPath("");
 173         File testFile = new File(tmpFolderName + mNewName);
 174         File tmpFolder = testFile.getParentFile();
 175         tmpFolder.mkdirs();
 176         if (!tmpFolder.isDirectory()) {
 177             throw new IOException("Unexpected error: temporal directory could not be created");
 178         }
 179         try {
 180             testFile.createNewFile();   // return value is ignored; it could be 'false' because the file already existed, that doesn't invalidate the name
 181         } catch (IOException e) {
 182             Log_OC.i(TAG, "Test for validity of name " + mNewName + " in the file system failed");
 183             return false;
 184         }
 185         boolean result = (testFile.exists() && testFile.isFile());
 186
 187         // cleaning ; result is ignored, since there is not much we could do in case of failure, but repeat and repeat...
 188         testFile.delete();
 189
 190         return result;
 191     }
 192
 193 }