src/com/owncloud/android/files/services/FileObserverService.java

   1 package com.owncloud.android.files.services;
   2
   3 import java.util.ArrayList;
   4 import java.util.List;
   5
   6 import com.owncloud.android.AccountUtils;
   7 import com.owncloud.android.datamodel.FileDataStorageManager;
   8 import com.owncloud.android.db.ProviderMeta.ProviderTableMeta;
   9 import com.owncloud.android.files.OwnCloudFileObserver;
  10
  11 import android.accounts.Account;
  12 import android.accounts.AccountManager;
  13 import android.app.Service;
  14 import android.content.BroadcastReceiver;
  15 import android.content.Context;
  16 import android.content.Intent;
  17 import android.content.IntentFilter;
  18 import android.database.Cursor;
  19 import android.os.Binder;
  20 import android.os.IBinder;
  21 import android.util.Log;
  22
  23 public class FileObserverService extends Service {
  24
  25     public final static String KEY_FILE_CMD = "KEY_FILE_CMD";
  26     public final static String KEY_CMD_ARG = "KEY_CMD_ARG";
  27
  28     public final static int CMD_INIT_OBSERVED_LIST = 1;
  29     public final static int CMD_ADD_OBSERVED_FILE = 2;
  30     public final static int CMD_DEL_OBSERVED_FILE = 3;
  31     public final static int CMD_ADD_DOWNLOADING_FILE = 4;
  32
  33     private static String TAG = "FileObserverService";
  34     private static List<OwnCloudFileObserver> mObservers;
  35     private static List<DownloadCompletedReceiver> mDownloadReceivers;
  36     private static Object mReceiverListLock = new Object();
  37     private IBinder mBinder = new LocalBinder();
  38
  39     public class LocalBinder extends Binder {
  40         FileObserverService getService() {
  41             return FileObserverService.this;
  42         }
  43     }
  44
  45     @Override
  46     public IBinder onBind(Intent intent) {
  47         return mBinder;
  48     }
  49
  50     @Override
  51     public int onStartCommand(Intent intent, int flags, int startId) {
  52         // this occurs when system tries to restart
  53         // service, so we need to reinitialize observers
  54         if (intent == null) {
  55             initializeObservedList();
  56             return Service.START_STICKY;
  57         }
  58
  59         if (!intent.hasExtra(KEY_FILE_CMD)) {
  60             Log.e(TAG, "No KEY_FILE_CMD argument given");
  61             return Service.START_STICKY;
  62         }
  63
  64         switch (intent.getIntExtra(KEY_FILE_CMD, -1)) {
  65             case CMD_INIT_OBSERVED_LIST:
  66                 initializeObservedList();
  67                 break;
  68             case CMD_ADD_OBSERVED_FILE:
  69                 addObservedFile(intent.getStringExtra(KEY_CMD_ARG));
  70                 break;
  71             case CMD_DEL_OBSERVED_FILE:
  72                 removeObservedFile(intent.getStringExtra(KEY_CMD_ARG));
  73                 break;
  74             case CMD_ADD_DOWNLOADING_FILE:
  75                 addDownloadingFile(intent.getStringExtra(KEY_CMD_ARG));
  76                 break;
  77             default:
  78                 Log.wtf(TAG, "Incorrect key given");
  79         }
  80
  81         return Service.START_STICKY;
  82     }
  83
  84     private void initializeObservedList() {
  85         if (mObservers != null) return; // nothing to do here
  86         mObservers = new ArrayList<OwnCloudFileObserver>();
  87         mDownloadReceivers = new ArrayList<DownloadCompletedReceiver>();
  88         Cursor c = getContentResolver().query(
  89                 ProviderTableMeta.CONTENT_URI,
  90                 null,
  91                 ProviderTableMeta.FILE_KEEP_IN_SYNC + " = ?",
  92                 new String[] {String.valueOf(1)},
  93                 null);
  94         if (!c.moveToFirst()) return;
  95         AccountManager acm = AccountManager.get(this);
  96         Account[] accounts = acm.getAccounts();
  97         do {
  98             Account account = null;
  99             for (Account a : accounts)
 100                 if (a.name.equals(c.getString(c.getColumnIndex(ProviderTableMeta.FILE_ACCOUNT_OWNER)))) {
 101                     account = a;
 102                     break;
 103                 }
 104
 105             if (account == null) continue;
 106             FileDataStorageManager storage =
 107                     new FileDataStorageManager(account, getContentResolver());
 108             if (!storage.fileExists(c.getString(c.getColumnIndex(ProviderTableMeta.FILE_PATH))))
 109                 continue;
 110
 111             String path = c.getString(c.getColumnIndex(ProviderTableMeta.FILE_STORAGE_PATH));
 112             OwnCloudFileObserver observer =
 113                     new OwnCloudFileObserver(path, OwnCloudFileObserver.CHANGES_ONLY);
 114             observer.setContext(getApplicationContext());
 115             observer.setAccount(account);
 116             observer.setStorageManager(storage);
 117             observer.setOCFile(storage.getFileByPath(c.getString(c.getColumnIndex(ProviderTableMeta.FILE_PATH))));
 118             observer.startWatching();
 119             mObservers.add(observer);
 120             Log.d(TAG, "Started watching file " + path);
 121
 122         } while (c.moveToNext());
 123         c.close();
 124     }
 125
 126     private void addObservedFile(String path) {
 127         if (path == null) return;
 128         if (mObservers == null) {
 129             // this is very rare case when service was killed by system
 130             // and observers list was deleted in that procedure
 131             initializeObservedList();
 132         }
 133         boolean duplicate = false;
 134         OwnCloudFileObserver observer = null;
 135         for (int i = 0; i < mObservers.size(); ++i) {
 136             observer = mObservers.get(i);
 137             if (observer.getPath().equals(path))
 138                 duplicate = true;
 139             observer.setContext(getBaseContext());
 140         }
 141         if (duplicate) return;
 142         observer = new OwnCloudFileObserver(path, OwnCloudFileObserver.CHANGES_ONLY);
 143         observer.setContext(getBaseContext());
 144         Account account = AccountUtils.getCurrentOwnCloudAccount(getBaseContext());
 145         observer.setAccount(account);
 146         FileDataStorageManager storage =
 147                 new FileDataStorageManager(account, getContentResolver());
 148         observer.setStorageManager(storage);
 149         observer.setOCFile(storage.getFileByLocalPath(path));
 150
 151         DownloadCompletedReceiver receiver = new DownloadCompletedReceiver(path, observer);
 152         registerReceiver(receiver, new IntentFilter(FileDownloader.DOWNLOAD_FINISH_MESSAGE));
 153
 154         mObservers.add(observer);
 155         Log.d(TAG, "Observer added for path " + path);
 156     }
 157
 158     private void removeObservedFile(String path) {
 159         if (path == null) return;
 160         if (mObservers == null) {
 161             initializeObservedList();
 162             return;
 163         }
 164         for (int i = 0; i < mObservers.size(); ++i) {
 165             OwnCloudFileObserver observer = mObservers.get(i);
 166             if (observer.getPath().equals(path)) {
 167                 observer.stopWatching();
 168                 mObservers.remove(i);
 169                 break;
 170             }
 171         }
 172         Log.d(TAG, "Stopped watching " + path);
 173     }
 174
 175     private void addDownloadingFile(String remotePath) {
 176         OwnCloudFileObserver observer = null;
 177         for (OwnCloudFileObserver o : mObservers) {
 178             if (o.getRemotePath().equals(remotePath)) {
 179                 observer = o;
 180                 break;
 181             }
 182         }
 183         if (observer == null) {
 184             Log.e(TAG, "Couldn't find observer for remote file " + remotePath);
 185             return;
 186         }
 187         observer.stopWatching();
 188         DownloadCompletedReceiver dcr = new DownloadCompletedReceiver(observer.getPath(), observer);
 189         registerReceiver(dcr, new IntentFilter(FileDownloader.DOWNLOAD_FINISH_MESSAGE));
 190     }
 191
 192
 193     private static void addReceiverToList(DownloadCompletedReceiver r) {
 194         synchronized(mReceiverListLock) {
 195             mDownloadReceivers.add(r);
 196         }
 197     }
 198
 199     private static void removeReceiverFromList(DownloadCompletedReceiver r) {
 200         synchronized(mReceiverListLock) {
 201             mDownloadReceivers.remove(r);
 202         }
 203     }
 204
 205     private class DownloadCompletedReceiver extends BroadcastReceiver {
 206         String mPath;
 207         OwnCloudFileObserver mObserver;
 208
 209         public DownloadCompletedReceiver(String path, OwnCloudFileObserver observer) {
 210             mPath = path;
 211             mObserver = observer;
 212             addReceiverToList(this);
 213         }
 214
 215         @Override
 216         public void onReceive(Context context, Intent intent) {
 217             if (mPath.equals(intent.getStringExtra(FileDownloader.EXTRA_FILE_PATH))) {
 218                 context.unregisterReceiver(this);
 219                 removeReceiverFromList(this);
 220                 mObserver.startWatching();
 221                 Log.d(TAG, "Started watching " + mPath);
 222                 return;
 223             }
 224         }
 225
 226         @Override
 227         public boolean equals(Object o) {
 228             if (o instanceof DownloadCompletedReceiver)
 229                 return mPath.equals(((DownloadCompletedReceiver)o).mPath);
 230             return super.equals(o);
 231         }
 232     }
 233 }