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

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012 Bartek Przybylski
   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 as published by
   6  *   the Free Software Foundation, either version 3 of the License, or
   7  *   (at your option) any later version.
   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.services;
  20
  21 import java.io.File;
  22 import java.util.AbstractList;
  23 import java.util.Iterator;
  24 import java.util.Vector;
  25 import java.util.concurrent.ConcurrentHashMap;
  26 import java.util.concurrent.ConcurrentMap;
  27
  28 import com.owncloud.android.datamodel.FileDataStorageManager;
  29 import com.owncloud.android.datamodel.OCFile;
  30 import eu.alefzero.webdav.OnDatatransferProgressListener;
  31
  32 import com.owncloud.android.network.OwnCloudClientUtils;
  33 import com.owncloud.android.operations.DownloadFileOperation;
  34 import com.owncloud.android.operations.RemoteOperationResult;
  35 import com.owncloud.android.ui.activity.FileDetailActivity;
  36 import com.owncloud.android.ui.fragment.FileDetailFragment;
  37
  38 import android.accounts.Account;
  39 import android.app.Notification;
  40 import android.app.NotificationManager;
  41 import android.app.PendingIntent;
  42 import android.app.Service;
  43 import android.content.Intent;
  44 import android.os.Binder;
  45 import android.os.Handler;
  46 import android.os.HandlerThread;
  47 import android.os.IBinder;
  48 import android.os.Looper;
  49 import android.os.Message;
  50 import android.os.Process;
  51 import android.util.Log;
  52 import android.widget.RemoteViews;
  53
  54 import com.owncloud.android.R;
  55 import eu.alefzero.webdav.WebdavClient;
  56
  57 public class FileDownloader extends Service implements OnDatatransferProgressListener {
  58
  59     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  60     public static final String EXTRA_FILE = "FILE";
  61
  62     public static final String DOWNLOAD_ADDED_MESSAGE = "DOWNLOAD_ADDED";
  63     public static final String DOWNLOAD_FINISH_MESSAGE = "DOWNLOAD_FINISH";
  64     public static final String EXTRA_DOWNLOAD_RESULT = "RESULT";
  65     public static final String EXTRA_FILE_PATH = "FILE_PATH";
  66     public static final String EXTRA_REMOTE_PATH = "REMOTE_PATH";
  67     public static final String ACCOUNT_NAME = "ACCOUNT_NAME";
  68
  69     private static final String TAG = "FileDownloader";
  70
  71     private Looper mServiceLooper;
  72     private ServiceHandler mServiceHandler;
  73     private IBinder mBinder;
  74     private WebdavClient mDownloadClient = null;
  75     private Account mLastAccount = null;
  76     private FileDataStorageManager mStorageManager;
  77
  78     private ConcurrentMap<String, DownloadFileOperation> mPendingDownloads = new ConcurrentHashMap<String, DownloadFileOperation>();
  79     private DownloadFileOperation mCurrentDownload = null;
  80
  81     private NotificationManager mNotificationManager;
  82     private Notification mNotification;
  83     private int mLastPercent;
  84
  85
  86     /**
  87      * Builds a key for mPendingDownloads from the account and file to download
  88      *
  89      * @param account   Account where the file to download is stored
  90      * @param file      File to download
  91      */
  92     private String buildRemoteName(Account account, OCFile file) {
  93         return account.name + file.getRemotePath();
  94     }
  95
  96
  97     /**
  98      * Service initialization
  99      */
 100     @Override
 101     public void onCreate() {
 102         super.onCreate();
 103         mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
 104         HandlerThread thread = new HandlerThread("FileDownloaderThread",
 105                 Process.THREAD_PRIORITY_BACKGROUND);
 106         thread.start();
 107         mServiceLooper = thread.getLooper();
 108         mServiceHandler = new ServiceHandler(mServiceLooper, this);
 109         mBinder = new FileDownloaderBinder();
 110     }
 111
 112
 113     /**
 114      * Entry point to add one or several files to the queue of downloads.
 115      *
 116      * New downloads are added calling to startService(), resulting in a call to this method. This ensures the service will keep on working
 117      * although the caller activity goes away.
 118      */
 119     @Override
 120     public int onStartCommand(Intent intent, int flags, int startId) {
 121         if (    !intent.hasExtra(EXTRA_ACCOUNT) ||
 122                 !intent.hasExtra(EXTRA_FILE)
 123                 /*!intent.hasExtra(EXTRA_FILE_PATH) ||
 124                 !intent.hasExtra(EXTRA_REMOTE_PATH)*/
 125            ) {
 126             Log.e(TAG, "Not enough information provided in intent");
 127             return START_NOT_STICKY;
 128         }
 129         Account account = intent.getParcelableExtra(EXTRA_ACCOUNT);
 130         OCFile file = intent.getParcelableExtra(EXTRA_FILE);
 131
 132         AbstractList<String> requestedDownloads = new Vector<String>(); // dvelasco: now this always contains just one element, but that can change in a near future (download of multiple selection)
 133         String downloadKey = buildRemoteName(account, file);
 134         try {
 135             DownloadFileOperation newDownload = new DownloadFileOperation(account, file);
 136             mPendingDownloads.putIfAbsent(downloadKey, newDownload);
 137             newDownload.addDatatransferProgressListener(this);
 138             requestedDownloads.add(downloadKey);
 139             sendBroadcastNewDownload(newDownload);
 140
 141         } catch (IllegalArgumentException e) {
 142             Log.e(TAG, "Not enough information provided in intent: " + e.getMessage());
 143             return START_NOT_STICKY;
 144         }
 145
 146         if (requestedDownloads.size() > 0) {
 147             Message msg = mServiceHandler.obtainMessage();
 148             msg.arg1 = startId;
 149             msg.obj = requestedDownloads;
 150             mServiceHandler.sendMessage(msg);
 151         }
 152
 153         return START_NOT_STICKY;
 154     }
 155
 156
 157     /**
 158      * Provides a binder object that clients can use to perform operations on the queue of downloads, excepting the addition of new files.
 159      *
 160      * Implemented to perform cancellation, pause and resume of existing downloads.
 161      */
 162     @Override
 163     public IBinder onBind(Intent arg0) {
 164         return mBinder;
 165     }
 166
 167
 168     /**
 169      *  Binder to let client components to perform operations on the queue of downloads.
 170      *
 171      *  It provides by itself the available operations.
 172      */
 173     public class FileDownloaderBinder extends Binder {
 174
 175         /**
 176          * Cancels a pending or current download of a remote file.
 177          *
 178          * @param account       Owncloud account where the remote file is stored.
 179          * @param file          A file in the queue of pending downloads
 180          */
 181         public void cancel(Account account, OCFile file) {
 182             DownloadFileOperation download = null;
 183             synchronized (mPendingDownloads) {
 184                 download = mPendingDownloads.remove(buildRemoteName(account, file));
 185             }
 186             if (download != null) {
 187                 download.cancel();
 188             }
 189         }
 190
 191
 192         /**
 193          * Returns True when the file described by 'file' in the ownCloud account 'account' is downloading or waiting to download
 194          *
 195          * @param account       Owncloud account where the remote file is stored.
 196          * @param file          A file that could be in the queue of downloads.
 197          */
 198         public boolean isDownloading(Account account, OCFile file) {
 199             synchronized (mPendingDownloads) {
 200                 return (mPendingDownloads.containsKey(buildRemoteName(account, file)));
 201             }
 202         }
 203     }
 204
 205
 206     /**
 207      * Download worker. Performs the pending downloads in the order they were requested.
 208      *
 209      * Created with the Looper of a new thread, started in {@link FileUploader#onCreate()}.
 210      */
 211     private static class ServiceHandler extends Handler {
 212         // don't make it a final class, and don't remove the static ; lint will warn about a possible memory leak
 213         FileDownloader mService;
 214         public ServiceHandler(Looper looper, FileDownloader service) {
 215             super(looper);
 216             if (service == null)
 217                 throw new IllegalArgumentException("Received invalid NULL in parameter 'service'");
 218             mService = service;
 219         }
 220
 221         @Override
 222         public void handleMessage(Message msg) {
 223             @SuppressWarnings("unchecked")
 224             AbstractList<String> requestedDownloads = (AbstractList<String>) msg.obj;
 225             if (msg.obj != null) {
 226                 Iterator<String> it = requestedDownloads.iterator();
 227                 while (it.hasNext()) {
 228                     mService.downloadFile(it.next());
 229                 }
 230             }
 231             mService.stopSelf(msg.arg1);
 232         }
 233     }
 234
 235
 236
 237     /**
 238      * Core download method: requests a file to download and stores it.
 239      *
 240      * @param downloadKey   Key to access the download to perform, contained in mPendingDownloads
 241      */
 242     private void downloadFile(String downloadKey) {
 243
 244         synchronized(mPendingDownloads) {
 245             mCurrentDownload = mPendingDownloads.get(downloadKey);
 246         }
 247
 248         if (mCurrentDownload != null) {
 249
 250             notifyDownloadStart(mCurrentDownload);
 251
 252             /// prepare client object to send the request to the ownCloud server
 253             if (mDownloadClient == null || !mLastAccount.equals(mCurrentDownload.getAccount())) {
 254                 mLastAccount = mCurrentDownload.getAccount();
 255                 mStorageManager = new FileDataStorageManager(mLastAccount, getContentResolver());
 256                 mDownloadClient = OwnCloudClientUtils.createOwnCloudClient(mLastAccount, getApplicationContext());
 257             }
 258
 259             /// perform the download
 260             RemoteOperationResult downloadResult = null;
 261             try {
 262                 downloadResult = mCurrentDownload.execute(mDownloadClient);
 263                 if (downloadResult.isSuccess()) {
 264                     saveDownloadedFile();
 265                 }
 266
 267             } finally {
 268                 synchronized(mPendingDownloads) {
 269                     mPendingDownloads.remove(downloadKey);
 270                 }
 271             }
 272
 273
 274             /// notify result
 275             notifyDownloadResult(mCurrentDownload, downloadResult);
 276
 277             sendBroadcastDownloadFinished(mCurrentDownload, downloadResult);
 278         }
 279     }
 280
 281
 282     /**
 283      * Updates the OC File after a successful download.
 284      */
 285     private void saveDownloadedFile() {
 286         OCFile file = mCurrentDownload.getFile();
 287         long syncDate = System.currentTimeMillis();
 288         file.setLastSyncDateForProperties(syncDate);
 289         file.setLastSyncDateForData(syncDate);
 290         file.setModificationTimestamp(mCurrentDownload.getModificationTimestamp());
 291         // file.setEtag(mCurrentDownload.getEtag());    // TODO Etag, where available
 292         file.setMimetype(mCurrentDownload.getMimeType());
 293         file.setStoragePath(mCurrentDownload.getSavePath());
 294         file.setFileLength((new File(mCurrentDownload.getSavePath()).length()));
 295         mStorageManager.saveFile(file);
 296     }
 297
 298
 299     /**
 300      * Creates a status notification to show the download progress
 301      *
 302      * @param download  Download operation starting.
 303      */
 304     private void notifyDownloadStart(DownloadFileOperation download) {
 305         /// create status notification with a progress bar
 306         mLastPercent = 0;
 307         mNotification = new Notification(R.drawable.icon, getString(R.string.downloader_download_in_progress_ticker), System.currentTimeMillis());
 308         mNotification.flags |= Notification.FLAG_ONGOING_EVENT;
 309         mNotification.contentView = new RemoteViews(getApplicationContext().getPackageName(), R.layout.progressbar_layout);
 310         mNotification.contentView.setProgressBar(R.id.status_progress, 100, 0, download.getSize() < 0);
 311         mNotification.contentView.setTextViewText(R.id.status_text, String.format(getString(R.string.downloader_download_in_progress_content), 0, new File(download.getSavePath()).getName()));
 312         mNotification.contentView.setImageViewResource(R.id.status_icon, R.drawable.icon);
 313
 314         /// includes a pending intent in the notification showing the details view of the file
 315         Intent showDetailsIntent = new Intent(this, FileDetailActivity.class);
 316         showDetailsIntent.putExtra(FileDetailFragment.EXTRA_FILE, download.getFile());
 317         showDetailsIntent.putExtra(FileDetailFragment.EXTRA_ACCOUNT, download.getAccount());
 318         showDetailsIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 319         mNotification.contentIntent = PendingIntent.getActivity(getApplicationContext(), (int)System.currentTimeMillis(), showDetailsIntent, 0);
 320
 321         mNotificationManager.notify(R.string.downloader_download_in_progress_ticker, mNotification);
 322     }
 323
 324
 325     /**
 326      * Callback method to update the progress bar in the status notification.
 327      */
 328     @Override
 329     public void onTransferProgress(long progressRate, long totalTransferredSoFar, long totalToTransfer, String fileName) {
 330         int percent = (int)(100.0*((double)totalTransferredSoFar)/((double)totalToTransfer));
 331         if (percent != mLastPercent) {
 332           mNotification.contentView.setProgressBar(R.id.status_progress, 100, percent, totalToTransfer < 0);
 333           String text = String.format(getString(R.string.downloader_download_in_progress_content), percent, fileName);
 334           mNotification.contentView.setTextViewText(R.id.status_text, text);
 335           mNotificationManager.notify(R.string.downloader_download_in_progress_ticker, mNotification);
 336         }
 337         mLastPercent = percent;
 338     }
 339
 340
 341     /**
 342      * Callback method to update the progress bar in the status notification (old version)
 343      */
 344     @Override
 345     public void onTransferProgress(long progressRate) {
 346         // NOTHING TO DO HERE ANYMORE
 347     }
 348
 349
 350     /**
 351      * Updates the status notification with the result of a download operation.
 352      *
 353      * @param downloadResult    Result of the download operation.
 354      * @param download          Finished download operation
 355      */
 356     private void notifyDownloadResult(DownloadFileOperation download, RemoteOperationResult downloadResult) {
 357         mNotificationManager.cancel(R.string.downloader_download_in_progress_ticker);
 358         if (!downloadResult.isCancelled()) {
 359             int tickerId = (downloadResult.isSuccess()) ? R.string.downloader_download_succeeded_ticker : R.string.downloader_download_failed_ticker;
 360             int contentId = (downloadResult.isSuccess()) ? R.string.downloader_download_succeeded_content : R.string.downloader_download_failed_content;
 361             Notification finalNotification = new Notification(R.drawable.icon, getString(tickerId), System.currentTimeMillis());
 362             finalNotification.flags |= Notification.FLAG_AUTO_CANCEL;
 363             // TODO put something smart in the contentIntent below
 364             finalNotification.contentIntent = PendingIntent.getActivity(getApplicationContext(), (int)System.currentTimeMillis(), new Intent(), 0);
 365             finalNotification.setLatestEventInfo(getApplicationContext(), getString(tickerId), String.format(getString(contentId), new File(download.getSavePath()).getName()), finalNotification.contentIntent);
 366             mNotificationManager.notify(tickerId, finalNotification);
 367         }
 368     }
 369
 370
 371     /**
 372      * Sends a broadcast when a download finishes in order to the interested activities can update their view
 373      *
 374      * @param download          Finished download operation
 375      * @param downloadResult    Result of the download operation
 376      */
 377     private void sendBroadcastDownloadFinished(DownloadFileOperation download, RemoteOperationResult downloadResult) {
 378         Intent end = new Intent(DOWNLOAD_FINISH_MESSAGE);
 379         end.putExtra(EXTRA_DOWNLOAD_RESULT, downloadResult.isSuccess());
 380         end.putExtra(ACCOUNT_NAME, download.getAccount().name);
 381         end.putExtra(EXTRA_REMOTE_PATH, download.getRemotePath());
 382         end.putExtra(EXTRA_FILE_PATH, download.getSavePath());
 383         sendStickyBroadcast(end);
 384     }
 385
 386
 387     /**
 388      * Sends a broadcast when a new download is added to the queue.
 389      *
 390      * @param download          Added download operation
 391      */
 392     private void sendBroadcastNewDownload(DownloadFileOperation download) {
 393         Intent added = new Intent(DOWNLOAD_ADDED_MESSAGE);
 394         /*added.putExtra(ACCOUNT_NAME, download.getAccount().name);
 395         added.putExtra(EXTRA_REMOTE_PATH, download.getRemotePath());*/
 396         added.putExtra(EXTRA_FILE_PATH, download.getSavePath());
 397         sendStickyBroadcast(added);
 398     }
 399
 400 }