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 import com.owncloud.android.files.OwnCloudFileObserver.FileObserverStatusListener;
  11 import com.owncloud.android.ui.activity.ConflictsResolveActivity;
  12
  13 import android.accounts.Account;
  14 import android.accounts.AccountManager;
  15 import android.app.Service;
  16 import android.content.BroadcastReceiver;
  17 import android.content.Context;
  18 import android.content.Intent;
  19 import android.content.IntentFilter;
  20 import android.database.Cursor;
  21 import android.os.Binder;
  22 import android.os.IBinder;
  23 import android.util.Log;
  24
  25 public class FileObserverService extends Service implements FileObserverStatusListener {
  26
  27     public final static String KEY_FILE_CMD = "KEY_FILE_CMD";
  28     public final static String KEY_CMD_ARG = "KEY_CMD_ARG";
  29
  30     public final static int CMD_INIT_OBSERVED_LIST = 1;
  31     public final static int CMD_ADD_OBSERVED_FILE = 2;
  32     public final static int CMD_DEL_OBSERVED_FILE = 3;
  33     public final static int CMD_ADD_DOWNLOADING_FILE = 4;
  34
  35     private static String TAG = "FileObserverService";
  36     private static List<OwnCloudFileObserver> mObservers;
  37     private static List<DownloadCompletedReceiver> mDownloadReceivers;
  38     private static Object mReceiverListLock = new Object();
  39     private IBinder mBinder = new LocalBinder();
  40
  41     public class LocalBinder extends Binder {
  42         FileObserverService getService() {
  43             return FileObserverService.this;
  44         }
  45     }
  46
  47     @Override
  48     public IBinder onBind(Intent intent) {
  49         return mBinder;
  50     }
  51
  52     @Override
  53     public int onStartCommand(Intent intent, int flags, int startId) {
  54         // this occurs when system tries to restart
  55         // service, so we need to reinitialize observers
  56         if (intent == null) {
  57             initializeObservedList();
  58             return Service.START_STICKY;
  59         }
  60
  61         if (!intent.hasExtra(KEY_FILE_CMD)) {
  62             Log.e(TAG, "No KEY_FILE_CMD argument given");
  63             return Service.START_STICKY;
  64         }
  65
  66         switch (intent.getIntExtra(KEY_FILE_CMD, -1)) {
  67             case CMD_INIT_OBSERVED_LIST:
  68                 initializeObservedList();
  69                 break;
  70             case CMD_ADD_OBSERVED_FILE:
  71                 addObservedFile(intent.getStringExtra(KEY_CMD_ARG));
  72                 break;
  73             case CMD_DEL_OBSERVED_FILE:
  74                 removeObservedFile(intent.getStringExtra(KEY_CMD_ARG));
  75                 break;
  76             case CMD_ADD_DOWNLOADING_FILE:
  77                 addDownloadingFile(intent.getStringExtra(KEY_CMD_ARG));
  78                 break;
  79             default:
  80                 Log.wtf(TAG, "Incorrect key given");
  81         }
  82
  83         return Service.START_STICKY;
  84     }
  85
  86     private void initializeObservedList() {
  87         if (mObservers != null) return; // nothing to do here
  88         mObservers = new ArrayList<OwnCloudFileObserver>();
  89         mDownloadReceivers = new ArrayList<DownloadCompletedReceiver>();
  90         Cursor c = getContentResolver().query(
  91                 ProviderTableMeta.CONTENT_URI,
  92                 null,
  93                 ProviderTableMeta.FILE_KEEP_IN_SYNC + " = ?",
  94                 new String[] {String.valueOf(1)},
  95                 null);
  96         if (!c.moveToFirst()) return;
  97         AccountManager acm = AccountManager.get(this);
  98         Account[] accounts = acm.getAccounts();
  99         do {
 100             Account account = null;
 101             for (Account a : accounts)
 102                 if (a.name.equals(c.getString(c.getColumnIndex(ProviderTableMeta.FILE_ACCOUNT_OWNER)))) {
 103                     account = a;
 104                     break;
 105                 }
 106
 107             if (account == null) continue;
 108             FileDataStorageManager storage =
 109                     new FileDataStorageManager(account, getContentResolver());
 110             if (!storage.fileExists(c.getString(c.getColumnIndex(ProviderTableMeta.FILE_PATH))))
 111                 continue;
 112
 113             String path = c.getString(c.getColumnIndex(ProviderTableMeta.FILE_STORAGE_PATH));
 114             OwnCloudFileObserver observer =
 115                     new OwnCloudFileObserver(path, OwnCloudFileObserver.CHANGES_ONLY);
 116             observer.setContext(getApplicationContext());
 117             observer.setAccount(account);
 118             observer.setStorageManager(storage);
 119             observer.setOCFile(storage.getFileByPath(c.getString(c.getColumnIndex(ProviderTableMeta.FILE_PATH))));
 120             observer.addObserverStatusListener(this);
 121             observer.startWatching();
 122             mObservers.add(observer);
 123             Log.d(TAG, "Started watching file " + path);
 124
 125         } while (c.moveToNext());
 126         c.close();
 127     }
 128
 129     private void addObservedFile(String path) {
 130         if (path == null) return;
 131         if (mObservers == null) {
 132             // this is very rare case when service was killed by system
 133             // and observers list was deleted in that procedure
 134             initializeObservedList();
 135         }
 136         boolean duplicate = false;
 137         OwnCloudFileObserver observer = null;
 138         for (int i = 0; i < mObservers.size(); ++i) {
 139             observer = mObservers.get(i);
 140             if (observer.getPath().equals(path))
 141                 duplicate = true;
 142             observer.setContext(getBaseContext());
 143         }
 144         if (duplicate) return;
 145         observer = new OwnCloudFileObserver(path, OwnCloudFileObserver.CHANGES_ONLY);
 146         observer.setContext(getBaseContext());
 147         Account account = AccountUtils.getCurrentOwnCloudAccount(getBaseContext());
 148         observer.setAccount(account);
 149         FileDataStorageManager storage =
 150                 new FileDataStorageManager(account, getContentResolver());
 151         observer.setStorageManager(storage);
 152         observer.setOCFile(storage.getFileByLocalPath(path));
 153         observer.addObserverStatusListener(this);
 154
 155         DownloadCompletedReceiver receiver = new DownloadCompletedReceiver(path, observer);
 156         registerReceiver(receiver, new IntentFilter(FileDownloader.DOWNLOAD_FINISH_MESSAGE));
 157
 158         mObservers.add(observer);
 159         Log.d(TAG, "Observer added for path " + path);
 160     }
 161
 162     private void removeObservedFile(String path) {
 163         if (path == null) return;
 164         if (mObservers == null) {
 165             initializeObservedList();
 166             return;
 167         }
 168         for (int i = 0; i < mObservers.size(); ++i) {
 169             OwnCloudFileObserver observer = mObservers.get(i);
 170             if (observer.getPath().equals(path)) {
 171                 observer.stopWatching();
 172                 mObservers.remove(i);
 173                 break;
 174             }
 175         }
 176         Log.d(TAG, "Stopped watching " + path);
 177     }
 178
 179     private void addDownloadingFile(String remotePath) {
 180         OwnCloudFileObserver observer = null;
 181         for (OwnCloudFileObserver o : mObservers) {
 182             if (o.getRemotePath().equals(remotePath)) {
 183                 observer = o;
 184                 break;
 185             }
 186         }
 187         if (observer == null) {
 188             Log.e(TAG, "Couldn't find observer for remote file " + remotePath);
 189             return;
 190         }
 191         observer.stopWatching();
 192         DownloadCompletedReceiver dcr = new DownloadCompletedReceiver(observer.getPath(), observer);
 193         registerReceiver(dcr, new IntentFilter(FileDownloader.DOWNLOAD_FINISH_MESSAGE));
 194     }
 195
 196
 197     private static void addReceiverToList(DownloadCompletedReceiver r) {
 198         synchronized(mReceiverListLock) {
 199             mDownloadReceivers.add(r);
 200         }
 201     }
 202
 203     private static void removeReceiverFromList(DownloadCompletedReceiver r) {
 204         synchronized(mReceiverListLock) {
 205             mDownloadReceivers.remove(r);
 206         }
 207     }
 208
 209     @Override
 210     public void OnObservedFileStatusUpdate(String localPath, String remotePath, Account account, Status status) {
 211         switch (status) {
 212             case CONFLICT:
 213             {
 214                 Intent i = new Intent(getApplicationContext(), ConflictsResolveActivity.class);
 215                 i.setFlags(i.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
 216                 i.putExtra("remotepath", remotePath);
 217                 i.putExtra("localpath", localPath);
 218                 i.putExtra("account", account);
 219                 startActivity(i);
 220                 break;
 221             }
 222             case SENDING_TO_UPLOADER:
 223             case INCORRECT_MASK:
 224                 break;
 225             default:
 226                 Log.wtf(TAG, "Unhandled status " + status);
 227         }
 228     }
 229
 230     private class DownloadCompletedReceiver extends BroadcastReceiver {
 231         String mPath;
 232         OwnCloudFileObserver mObserver;
 233
 234         public DownloadCompletedReceiver(String path, OwnCloudFileObserver observer) {
 235             mPath = path;
 236             mObserver = observer;
 237             addReceiverToList(this);
 238         }
 239
 240         @Override
 241         public void onReceive(Context context, Intent intent) {
 242             if (mPath.equals(intent.getStringExtra(FileDownloader.EXTRA_FILE_PATH))) {
 243                 context.unregisterReceiver(this);
 244                 removeReceiverFromList(this);
 245                 mObserver.startWatching();
 246                 Log.d(TAG, "Started watching " + mPath);
 247                 return;
 248             }
 249         }
 250
 251         @Override
 252         public boolean equals(Object o) {
 253             if (o instanceof DownloadCompletedReceiver)
 254                 return mPath.equals(((DownloadCompletedReceiver)o).mPath);
 255             return super.equals(o);
 256         }
 257     }
 258 }