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package org.fox.ttrss.util;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Date;
import org.fox.ttrss.OnlineActivity;
import org.fox.ttrss.R;
import org.fox.ttrss.offline.OfflineDownloadService;
import android.app.ActivityManager;
import android.app.ActivityManager.RunningServiceInfo;
import android.app.IntentService;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Environment;
public class ImageCacheService extends IntentService {
@SuppressWarnings("unused")
private final String TAG = this.getClass().getSimpleName();
public static final int NOTIFY_DOWNLOADING = 1;
private static final String CACHE_PATH = "/image-cache/";
private int m_imagesDownloaded = 0;
private NotificationManager m_nmgr;
public ImageCacheService() {
super("ImageCacheService");
}
private boolean isDownloadServiceRunning() {
ActivityManager manager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
for (RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
if ("org.fox.ttrss.OfflineDownloadService".equals(service.service.getClassName())) {
return true;
}
}
return false;
}
@Override
public void onCreate() {
super.onCreate();
m_nmgr = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
}
public static boolean isUrlCached(Context context, String url) {
String hashedUrl = md5(url);
File storage = context.getExternalCacheDir();
File file = new File(storage.getAbsolutePath() + CACHE_PATH + "/" + hashedUrl + ".png");
return file.exists();
}
public static String getCacheFileName(Context context, String url) {
String hashedUrl = md5(url);
File storage = context.getExternalCacheDir();
File file = new File(storage.getAbsolutePath() + CACHE_PATH + "/" + hashedUrl + ".png");
return file.getAbsolutePath();
}
public static void cleanupCache(Context context, boolean deleteAll) {
if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {
File storage = context.getExternalCacheDir();
File cachePath = new File(storage.getAbsolutePath() + CACHE_PATH);
long now = new Date().getTime();
if (cachePath.isDirectory()) {
for (File file : cachePath.listFiles()) {
if (deleteAll || now - file.lastModified() > 1000*60*60*24*7) {
file.delete();
}
}
}
}
}
protected static String md5(String s) {
try {
MessageDigest digest = java.security.MessageDigest.getInstance("MD5");
digest.update(s.getBytes());
byte messageDigest[] = digest.digest();
StringBuffer hexString = new StringBuffer();
for (int i=0; i<messageDigest.length; i++)
hexString.append(Integer.toHexString(0xFF & messageDigest[i]));
return hexString.toString();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return null;
}
private InputStream getStream(String urlString) {
try {
URL url = new URL(urlString);
URLConnection urlConnection = url.openConnection();
urlConnection.setConnectTimeout(250);
urlConnection.setReadTimeout(5*1000);
return urlConnection.getInputStream();
} catch (Exception ex) {
return null;
}
}
@SuppressWarnings("deprecation")
private void updateNotification(String msg) {
Notification notification = new Notification(R.drawable.icon,
getString(R.string.notify_downloading_title), System.currentTimeMillis());
PendingIntent contentIntent = PendingIntent.getActivity(this, 0,
new Intent(this, OnlineActivity.class), 0);
notification.flags |= Notification.FLAG_ONGOING_EVENT;
notification.flags |= Notification.FLAG_ONLY_ALERT_ONCE;
notification.setLatestEventInfo(this, getString(R.string.notify_downloading_title), msg, contentIntent);
m_nmgr.notify(NOTIFY_DOWNLOADING, notification);
}
/* private void updateNotification(int msgResId) {
updateNotification(getString(msgResId));
} */
@Override
protected void onHandleIntent(Intent intent) {
String url = intent.getStringExtra("url");
//Log.d(TAG, "got request to download URL=" + url);
if (!Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()))
return;
String hashedUrl = md5(url);
File storage = getExternalCacheDir();
File cachePath = new File(storage.getAbsolutePath() + CACHE_PATH);
if (!cachePath.exists()) cachePath.mkdirs();
if (cachePath.isDirectory() && hashedUrl != null) {
File outputFile = new File(cachePath.getAbsolutePath() + "/" + hashedUrl + ".png");
if (!outputFile.exists()) {
//Log.d(TAG, "downloading to " + outputFile.getAbsolutePath());
InputStream is = getStream(url);
if (is != null) {
try {
FileOutputStream fos = new FileOutputStream(outputFile);
byte[] buffer = new byte[1024];
int len = 0;
while ((len = is.read(buffer)) != -1) {
fos.write(buffer, 0, len);
}
fos.close();
is.close();
m_imagesDownloaded++;
updateNotification(getString(R.string.notify_downloading_images, m_imagesDownloaded));
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
@Override
public void onDestroy() {
super.onDestroy();
if (!isDownloadServiceRunning()) {
m_nmgr.cancel(NOTIFY_DOWNLOADING);
Intent success = new Intent();
success.setAction(OfflineDownloadService.INTENT_ACTION_SUCCESS);
success.addCategory(Intent.CATEGORY_DEFAULT);
sendBroadcast(success);
}
}
}
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