src/com/owncloud/android/files/OwnCloudFileObserver.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012 Bartek Przybylski
   3  *   Copyright (C) 2012-2014 ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License version 2,
   7  *   as published by the Free Software Foundation.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18
  19 package com.owncloud.android.files;
  20
  21 import java.io.File;
  22
  23 import com.owncloud.android.datamodel.FileDataStorageManager;
  24 import com.owncloud.android.datamodel.OCFile;
  25 import com.owncloud.android.lib.common.operations.RemoteOperationResult;
  26 import com.owncloud.android.operations.SynchronizeFileOperation;
  27 import com.owncloud.android.lib.common.operations.RemoteOperationResult.ResultCode;
  28 import com.owncloud.android.ui.activity.ConflictsResolveActivity;
  29 import com.owncloud.android.utils.Log_OC;
  30
  31 import android.accounts.Account;
  32 import android.content.Context;
  33 import android.content.Intent;
  34 import android.os.FileObserver;
  35
  36 public class OwnCloudFileObserver extends FileObserver {
  37
  38     private static int MASK = (FileObserver.MODIFY | FileObserver.CLOSE_WRITE);
  39
  40     private static String TAG = OwnCloudFileObserver.class.getSimpleName();
  41
  42     private String mPath;
  43     private int mMask;
  44     private Account mOCAccount;
  45     private Context mContext;
  46     private boolean mModified;
  47
  48
  49     public OwnCloudFileObserver(String path, Account account, Context context) {
  50         super(path, MASK);
  51         if (path == null)
  52             throw new IllegalArgumentException("NULL path argument received");
  53         if (account == null)
  54             throw new IllegalArgumentException("NULL account argument received");
  55         if (context == null)
  56             throw new IllegalArgumentException("NULL context argument received");
  57         mPath = path;
  58         mOCAccount = account;
  59         mContext = context;
  60         mModified = false;
  61     }
  62
  63
  64     @Override
  65     public void onEvent(int event, String path) {
  66         Log_OC.d(TAG, "Got file modified with event " + event + " and path " + mPath + ((path != null) ? File.separator + path : ""));
  67         if ((event & MASK) == 0) {
  68             Log_OC.wtf(TAG, "Incorrect event " + event + " sent for file " + mPath + ((path != null) ? File.separator + path : "") +
  69                          " with registered for " + mMask + " and original path " +
  70                          mPath);
  71         } else {
  72             if ((event & FileObserver.MODIFY) != 0) {
  73                 // file changed
  74                 mModified = true;
  75             }
  76             // not sure if it's possible, but let's assume that both kind of events can be received at the same time
  77             if ((event & FileObserver.CLOSE_WRITE) != 0) {
  78                 // file closed
  79                 if (mModified) {
  80                     mModified = false;
  81                     startSyncOperation();
  82                 }
  83             }
  84         }
  85     }
  86
  87
  88     private void startSyncOperation() {
  89         FileDataStorageManager storageManager = new FileDataStorageManager(mOCAccount, mContext.getContentResolver());
  90         OCFile file = storageManager.getFileByLocalPath(mPath);     // a fresh object is needed; many things could have occurred to the file since it was registered to observe
  91                                                                     // again, assuming that local files are linked to a remote file AT MOST, SOMETHING TO BE DONE;
  92         SynchronizeFileOperation sfo = new SynchronizeFileOperation(file,
  93                                                                     null,
  94                                                                     mOCAccount,
  95                                                                     true,
  96                                                                     mContext);
  97         RemoteOperationResult result = sfo.execute(storageManager, mContext);
  98         if (result.getCode() == ResultCode.SYNC_CONFLICT) {
  99             // ISSUE 5: if the user is not running the app (this is a service!), this can be very intrusive; a notification should be preferred
 100             Intent i = new Intent(mContext, ConflictsResolveActivity.class);
 101             i.setFlags(i.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
 102             i.putExtra(ConflictsResolveActivity.EXTRA_FILE, file);
 103             i.putExtra(ConflictsResolveActivity.EXTRA_ACCOUNT, mOCAccount);
 104             mContext.startActivity(i);
 105         }
 106         // TODO save other errors in some point where the user can inspect them later;
 107         //      or maybe just toast them;
 108         //      or nothing, very strange fails
 109     }
 110
 111 }