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package de.danoeh.antennapod.service;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
import android.support.v4.app.NotificationCompat;
import android.util.Log;
import de.danoeh.antennapod.AppConfig;
import de.danoeh.antennapod.R;
import de.danoeh.antennapod.feed.Feed;
import de.danoeh.antennapod.gpoddernet.GpodnetService;
import de.danoeh.antennapod.gpoddernet.GpodnetServiceAuthenticationException;
import de.danoeh.antennapod.gpoddernet.GpodnetServiceException;
import de.danoeh.antennapod.gpoddernet.model.GpodnetSubscriptionChange;
import de.danoeh.antennapod.gpoddernet.model.GpodnetUploadChangesResponse;
import de.danoeh.antennapod.preferences.GpodnetPreferences;
import de.danoeh.antennapod.storage.*;
import de.danoeh.antennapod.util.NetworkUtils;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ExecutionException;
/**
* Synchronizes local subscriptions with gpodder.net service. The service should be started with ACTION_SYNC as an action argument.
* This class also provides static methods for starting the GpodnetSyncService.
*/
public class GpodnetSyncService extends Service {
private static final String TAG = "GpodnetSyncService";
private static final long WAIT_INTERVAL = 5000L;
public static final String ARG_ACTION = "action";
public static final String ACTION_SYNC = "de.danoeh.antennapod.intent.action.sync";
private GpodnetService service;
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
final String action = (intent != null) ? intent.getStringExtra(ARG_ACTION) : null;
if (action != null && action.equals(ACTION_SYNC)) {
Log.d(TAG, String.format("Waiting %d milliseconds before uploading changes", WAIT_INTERVAL));
syncWaiterThread.restart();
} else {
Log.e(TAG, "Received invalid intent: action argument is null or invalid");
}
return START_FLAG_REDELIVERY;
}
@Override
public void onDestroy() {
super.onDestroy();
if (AppConfig.DEBUG) Log.d(TAG, "onDestroy");
syncWaiterThread.interrupt();
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
private synchronized GpodnetService tryLogin() throws GpodnetServiceException {
if (service == null) {
service = new GpodnetService();
service.authenticate(GpodnetPreferences.getUsername(), GpodnetPreferences.getPassword());
}
return service;
}
private synchronized void syncChanges() {
if (GpodnetPreferences.loggedIn() && NetworkUtils.networkAvailable(this)) {
final long timestamp = GpodnetPreferences.getLastSyncTimestamp();
try {
final List<String> localSubscriptions = DBReader.getFeedListDownloadUrls(this);
GpodnetService service = tryLogin();
if (timestamp == 0) {
// first sync: download all subscriptions...
GpodnetSubscriptionChange changes =
service.getSubscriptionChanges(GpodnetPreferences.getUsername(), GpodnetPreferences.getDeviceID(), 0);
if (AppConfig.DEBUG) Log.d(TAG, "Downloaded subscription changes: " + changes);
processSubscriptionChanges(localSubscriptions, changes);
// ... then upload all local subscriptions
if (AppConfig.DEBUG) Log.d(TAG, "Uploading subscription list: " + localSubscriptions);
GpodnetUploadChangesResponse uploadChangesResponse =
service.uploadChanges(GpodnetPreferences.getUsername(), GpodnetPreferences.getDeviceID(), localSubscriptions, new LinkedList<String>());
if (AppConfig.DEBUG) Log.d(TAG, "Uploading changes response: " + uploadChangesResponse);
DBWriter.updateFeedDownloadURLs(GpodnetSyncService.this, uploadChangesResponse.updatedUrls).get();
GpodnetPreferences.removeAddedFeeds(localSubscriptions);
GpodnetPreferences.removeRemovedFeeds(GpodnetPreferences.getRemovedFeedsCopy());
GpodnetPreferences.setLastSyncTimestamp(uploadChangesResponse.timestamp);
} else {
Set<String> added = GpodnetPreferences.getAddedFeedsCopy();
Set<String> removed = GpodnetPreferences.getRemovedFeedsCopy();
// download remote changes first...
GpodnetSubscriptionChange subscriptionChanges = service.getSubscriptionChanges(GpodnetPreferences.getUsername(), GpodnetPreferences.getDeviceID(), timestamp);
if (AppConfig.DEBUG) Log.d(TAG, "Downloaded subscription changes: " + subscriptionChanges);
processSubscriptionChanges(localSubscriptions, subscriptionChanges);
// ... then upload changes local changes
if (AppConfig.DEBUG) Log.d(TAG, String.format("Uploading subscriptions, Added: %s\nRemoved: %s",
added.toString(), removed));
GpodnetUploadChangesResponse uploadChangesResponse = service.uploadChanges(GpodnetPreferences.getUsername(), GpodnetPreferences.getDeviceID(), added, removed);
if (AppConfig.DEBUG) Log.d(TAG, "Upload subscriptions response: " + uploadChangesResponse);
GpodnetPreferences.removeAddedFeeds(added);
GpodnetPreferences.removeRemovedFeeds(removed);
DBWriter.updateFeedDownloadURLs(GpodnetSyncService.this, uploadChangesResponse.updatedUrls).get();
GpodnetPreferences.setLastSyncTimestamp(uploadChangesResponse.timestamp);
}
clearErrorNotifications();
} catch (GpodnetServiceException e) {
e.printStackTrace();
updateErrorNotification(e);
} catch (DownloadRequestException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (ExecutionException e) {
e.printStackTrace();
}
}
stopSelf();
}
private synchronized void processSubscriptionChanges(List<String> localSubscriptions, GpodnetSubscriptionChange changes) throws DownloadRequestException {
for (String downloadUrl : changes.getAdded()) {
if (!localSubscriptions.contains(downloadUrl)) {
Feed feed = new Feed(downloadUrl, new Date());
DownloadRequester.getInstance().downloadFeed(this, feed);
}
}
for (String downloadUrl : changes.getRemoved()) {
DBTasks.removeFeedWithDownloadUrl(GpodnetSyncService.this, downloadUrl);
}
}
private void clearErrorNotifications() {
NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
nm.cancel(R.id.notification_gpodnet_sync_error);
nm.cancel(R.id.notification_gpodnet_sync_autherror);
}
private void updateErrorNotification(GpodnetServiceException exception) {
if (AppConfig.DEBUG) Log.d(TAG, "Posting error notification");
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
final String title;
final String description;
final int id;
if (exception instanceof GpodnetServiceAuthenticationException) {
title = getString(R.string.gpodnetsync_auth_error_title);
description = getString(R.string.gpodnetsync_auth_error_descr);
id = R.id.notification_gpodnet_sync_autherror;
} else {
title = getString(R.string.gpodnetsync_error_title);
description = getString(R.string.gpodnetsync_error_descr) + exception.getMessage();
id = R.id.notification_gpodnet_sync_error;
}
Notification notification = builder.setContentTitle(title)
.setContentText(description)
.setSmallIcon(R.drawable.stat_notify_sync_error)
.setAutoCancel(true)
.build();
NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
nm.notify(id, notification);
}
private WaiterThread syncWaiterThread = new WaiterThread(WAIT_INTERVAL) {
@Override
public void onWaitCompleted() {
syncChanges();
}
};
private abstract class WaiterThread {
private long waitInterval;
private Thread thread;
private WaiterThread(long waitInterval) {
this.waitInterval = waitInterval;
reinit();
}
public abstract void onWaitCompleted();
public void exec() {
if (!thread.isAlive()) {
thread.start();
}
}
private void reinit() {
if (thread != null && thread.isAlive()) {
Log.d(TAG, "Interrupting waiter thread");
thread.interrupt();
}
thread = new Thread() {
@Override
public void run() {
try {
Thread.sleep(waitInterval);
} catch (InterruptedException e) {
e.printStackTrace();
}
if (!isInterrupted()) {
synchronized (this) {
onWaitCompleted();
}
}
}
};
}
public void restart() {
reinit();
exec();
}
public void interrupt() {
if (thread != null && thread.isAlive()) {
thread.interrupt();
}
}
}
public static void sendSyncIntent(Context context) {
if (GpodnetPreferences.loggedIn()) {
Intent intent = new Intent(context, GpodnetSyncService.class);
intent.putExtra(ARG_ACTION, ACTION_SYNC);
context.startService(intent);
}
}
}
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