1package eu.siacs.conversations.persistance;
  2
  3import android.annotation.TargetApi;
  4import android.content.ContentResolver;
  5import android.content.Context;
  6import android.content.Intent;
  7import android.database.Cursor;
  8import android.graphics.Bitmap;
  9import android.graphics.BitmapFactory;
 10import android.graphics.Canvas;
 11import android.graphics.Matrix;
 12import android.graphics.Paint;
 13import android.graphics.RectF;
 14import android.media.MediaMetadataRetriever;
 15import android.net.Uri;
 16import android.os.Build;
 17import android.os.Environment;
 18import android.os.ParcelFileDescriptor;
 19import android.provider.MediaStore;
 20import android.provider.OpenableColumns;
 21import android.support.v4.content.FileProvider;
 22import android.system.Os;
 23import android.system.StructStat;
 24import android.util.Base64;
 25import android.util.Base64OutputStream;
 26import android.util.Log;
 27import android.util.LruCache;
 28import android.webkit.MimeTypeMap;
 29
 30import java.io.ByteArrayOutputStream;
 31import java.io.Closeable;
 32import java.io.File;
 33import java.io.FileDescriptor;
 34import java.io.FileInputStream;
 35import java.io.FileNotFoundException;
 36import java.io.FileOutputStream;
 37import java.io.IOException;
 38import java.io.InputStream;
 39import java.io.OutputStream;
 40import java.net.Socket;
 41import java.net.URL;
 42import java.security.DigestOutputStream;
 43import java.security.MessageDigest;
 44import java.security.NoSuchAlgorithmException;
 45import java.text.SimpleDateFormat;
 46import java.util.Date;
 47import java.util.List;
 48import java.util.Locale;
 49
 50import eu.siacs.conversations.Config;
 51import eu.siacs.conversations.R;
 52import eu.siacs.conversations.entities.DownloadableFile;
 53import eu.siacs.conversations.entities.Message;
 54import eu.siacs.conversations.services.XmppConnectionService;
 55import eu.siacs.conversations.utils.CryptoHelper;
 56import eu.siacs.conversations.utils.ExifHelper;
 57import eu.siacs.conversations.utils.FileUtils;
 58import eu.siacs.conversations.utils.FileWriterException;
 59import eu.siacs.conversations.utils.MimeUtils;
 60import eu.siacs.conversations.xmpp.pep.Avatar;
 61
 62public class FileBackend {
 63	private static final SimpleDateFormat IMAGE_DATE_FORMAT = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US);
 64
 65	private static final String FILE_PROVIDER = ".files";
 66
 67	private XmppConnectionService mXmppConnectionService;
 68
 69	public FileBackend(XmppConnectionService service) {
 70		this.mXmppConnectionService = service;
 71	}
 72
 73	private void createNoMedia() {
 74		final File nomedia = new File(getConversationsFileDirectory()+".nomedia");
 75		if (!nomedia.exists()) {
 76			try {
 77				nomedia.createNewFile();
 78			} catch (Exception e) {
 79				Log.d(Config.LOGTAG, "could not create nomedia file");
 80			}
 81		}
 82	}
 83
 84	public void updateMediaScanner(File file) {
 85		if (file.getAbsolutePath().startsWith(getConversationsImageDirectory())) {
 86			Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
 87			intent.setData(Uri.fromFile(file));
 88			mXmppConnectionService.sendBroadcast(intent);
 89		} else {
 90			createNoMedia();
 91		}
 92	}
 93
 94	public boolean deleteFile(Message message) {
 95		File file = getFile(message);
 96		if (file.delete()) {
 97			updateMediaScanner(file);
 98			return true;
 99		} else {
100			return false;
101		}
102	}
103
104	public DownloadableFile getFile(Message message) {
105		return getFile(message, true);
106	}
107
108	public DownloadableFile getFile(Message message, boolean decrypted) {
109		final boolean encrypted = !decrypted
110				&& (message.getEncryption() == Message.ENCRYPTION_PGP
111				|| message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
112		final DownloadableFile file;
113		String path = message.getRelativeFilePath();
114		if (path == null) {
115			path = message.getUuid();
116		}
117		if (path.startsWith("/")) {
118			file = new DownloadableFile(path);
119		} else {
120			String mime = message.getMimeType();
121			if (mime != null && mime.startsWith("image")) {
122				file = new DownloadableFile(getConversationsImageDirectory() + path);
123			} else {
124				file = new DownloadableFile(getConversationsFileDirectory() + path);
125			}
126		}
127		if (encrypted) {
128			return new DownloadableFile(getConversationsFileDirectory() + file.getName() + ".pgp");
129		} else {
130			return file;
131		}
132	}
133
134	private static long getFileSize(Context context, Uri uri) {
135		Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
136		if (cursor != null && cursor.moveToFirst()) {
137			return cursor.getLong(cursor.getColumnIndex(OpenableColumns.SIZE));
138		} else {
139			return -1;
140		}
141	}
142
143	public static boolean allFilesUnderSize(Context context, List<Uri> uris, long max) {
144		if (max <= 0) {
145			Log.d(Config.LOGTAG,"server did not report max file size for http upload");
146			return true; //exception to be compatible with HTTP Upload < v0.2
147		}
148		for(Uri uri : uris) {
149			if (FileBackend.getFileSize(context, uri) > max) {
150				Log.d(Config.LOGTAG,"not all files are under "+max+" bytes. suggesting falling back to jingle");
151				return false;
152			}
153		}
154		return true;
155	}
156
157	public String getConversationsFileDirectory() {
158		if (Config.ONLY_INTERNAL_STORAGE) {
159			return mXmppConnectionService.getFilesDir().getAbsolutePath() + "/Files/";
160		} else {
161			return Environment.getExternalStorageDirectory().getAbsolutePath() + "/Conversations/";
162		}
163	}
164
165	public String getConversationsImageDirectory() {
166		if (Config.ONLY_INTERNAL_STORAGE) {
167			return mXmppConnectionService.getFilesDir().getAbsolutePath()+"/Pictures/";
168		} else {
169			return Environment.getExternalStoragePublicDirectory(
170					Environment.DIRECTORY_PICTURES).getAbsolutePath()
171					+ "/Conversations/";
172		}
173	}
174
175	public static String getConversationsLogsDirectory() {
176		return  Environment.getExternalStorageDirectory().getAbsolutePath()+"/Conversations/";
177	}
178
179	public Bitmap resize(Bitmap originalBitmap, int size) {
180		int w = originalBitmap.getWidth();
181		int h = originalBitmap.getHeight();
182		if (Math.max(w, h) > size) {
183			int scalledW;
184			int scalledH;
185			if (w <= h) {
186				scalledW = (int) (w / ((double) h / size));
187				scalledH = size;
188			} else {
189				scalledW = size;
190				scalledH = (int) (h / ((double) w / size));
191			}
192			Bitmap result = Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
193			if (originalBitmap != null && !originalBitmap.isRecycled()) {
194				originalBitmap.recycle();
195			}
196			return result;
197		} else {
198			return originalBitmap;
199		}
200	}
201
202	public static Bitmap rotate(Bitmap bitmap, int degree) {
203		if (degree == 0) {
204			return bitmap;
205		}
206		int w = bitmap.getWidth();
207		int h = bitmap.getHeight();
208		Matrix mtx = new Matrix();
209		mtx.postRotate(degree);
210		Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
211		if (bitmap != null && !bitmap.isRecycled()) {
212			bitmap.recycle();
213		}
214		return result;
215	}
216
217	public boolean useImageAsIs(Uri uri) {
218		String path = getOriginalPath(uri);
219		if (path == null) {
220			return false;
221		}
222		File file = new File(path);
223		long size = file.length();
224		if (size == 0 || size >= Config.IMAGE_MAX_SIZE ) {
225			return false;
226		}
227		BitmapFactory.Options options = new BitmapFactory.Options();
228		options.inJustDecodeBounds = true;
229		try {
230			BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri), null, options);
231			if (options == null || options.outMimeType == null || options.outHeight <= 0 || options.outWidth <= 0) {
232				return false;
233			}
234			return (options.outWidth <= Config.IMAGE_SIZE && options.outHeight <= Config.IMAGE_SIZE && options.outMimeType.contains(Config.IMAGE_FORMAT.name().toLowerCase()));
235		} catch (FileNotFoundException e) {
236			return false;
237		}
238	}
239
240	public String getOriginalPath(Uri uri) {
241		return FileUtils.getPath(mXmppConnectionService,uri);
242	}
243
244	public void copyFileToPrivateStorage(File file, Uri uri) throws FileCopyException {
245		Log.d(Config.LOGTAG,"copy file ("+uri.toString()+") to private storage "+file.getAbsolutePath());
246		file.getParentFile().mkdirs();
247		OutputStream os = null;
248		InputStream is = null;
249		try {
250			file.createNewFile();
251			os = new FileOutputStream(file);
252			is = mXmppConnectionService.getContentResolver().openInputStream(uri);
253			byte[] buffer = new byte[1024];
254			int length;
255			while ((length = is.read(buffer)) > 0) {
256				try {
257					os.write(buffer, 0, length);
258				} catch (IOException e) {
259					throw new FileWriterException();
260				}
261			}
262			try {
263				os.flush();
264			} catch (IOException e) {
265				throw new FileWriterException();
266			}
267		} catch(FileNotFoundException e) {
268			throw new FileCopyException(R.string.error_file_not_found);
269		} catch(FileWriterException e) {
270			throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
271		} catch (IOException e) {
272			e.printStackTrace();
273			throw new FileCopyException(R.string.error_io_exception);
274		} finally {
275			close(os);
276			close(is);
277		}
278	}
279
280	public void copyFileToPrivateStorage(Message message, Uri uri) throws FileCopyException {
281		String mime = MimeUtils.guessMimeTypeFromUri(mXmppConnectionService, uri);
282		Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage (mime="+mime+")");
283		String extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mime);
284		if (extension == null) {
285			extension = getExtensionFromUri(uri);
286		}
287		message.setRelativeFilePath(message.getUuid() + "." + extension);
288		copyFileToPrivateStorage(mXmppConnectionService.getFileBackend().getFile(message), uri);
289	}
290
291	private String getExtensionFromUri(Uri uri) {
292		String[] projection = {MediaStore.MediaColumns.DATA};
293		String filename = null;
294		Cursor cursor = mXmppConnectionService.getContentResolver().query(uri, projection, null, null, null);
295		if (cursor != null) {
296			try {
297				if (cursor.moveToFirst()) {
298					filename = cursor.getString(0);
299				}
300			} catch (Exception e) {
301				filename = null;
302			} finally {
303				cursor.close();
304			}
305		}
306		int pos = filename == null ? -1 : filename.lastIndexOf('.');
307		return pos > 0 ? filename.substring(pos+1) : null;
308	}
309
310	private void copyImageToPrivateStorage(File file, Uri image, int sampleSize) throws FileCopyException {
311		file.getParentFile().mkdirs();
312		InputStream is = null;
313		OutputStream os = null;
314		try {
315			if (!file.exists() && !file.createNewFile()) {
316				throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
317			}
318			is = mXmppConnectionService.getContentResolver().openInputStream(image);
319			if (is == null) {
320				throw new FileCopyException(R.string.error_not_an_image_file);
321			}
322			Bitmap originalBitmap;
323			BitmapFactory.Options options = new BitmapFactory.Options();
324			int inSampleSize = (int) Math.pow(2, sampleSize);
325			Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
326			options.inSampleSize = inSampleSize;
327			originalBitmap = BitmapFactory.decodeStream(is, null, options);
328			is.close();
329			if (originalBitmap == null) {
330				throw new FileCopyException(R.string.error_not_an_image_file);
331			}
332			Bitmap scaledBitmap = resize(originalBitmap, Config.IMAGE_SIZE);
333			int rotation = getRotation(image);
334			scaledBitmap = rotate(scaledBitmap, rotation);
335			boolean targetSizeReached = false;
336			int quality = Config.IMAGE_QUALITY;
337			while(!targetSizeReached) {
338				os = new FileOutputStream(file);
339				boolean success = scaledBitmap.compress(Config.IMAGE_FORMAT, quality, os);
340				if (!success) {
341					throw new FileCopyException(R.string.error_compressing_image);
342				}
343				os.flush();
344				targetSizeReached = file.length() <= Config.IMAGE_MAX_SIZE || quality <= 50;
345				quality -= 5;
346			}
347			scaledBitmap.recycle();
348		} catch (FileNotFoundException e) {
349			throw new FileCopyException(R.string.error_file_not_found);
350		} catch (IOException e) {
351			e.printStackTrace();
352			throw new FileCopyException(R.string.error_io_exception);
353		} catch (SecurityException e) {
354			throw new FileCopyException(R.string.error_security_exception_during_image_copy);
355		} catch (OutOfMemoryError e) {
356			++sampleSize;
357			if (sampleSize <= 3) {
358				copyImageToPrivateStorage(file, image, sampleSize);
359			} else {
360				throw new FileCopyException(R.string.error_out_of_memory);
361			}
362		} finally {
363			close(os);
364			close(is);
365		}
366	}
367
368	public void copyImageToPrivateStorage(File file, Uri image) throws FileCopyException {
369		Log.d(Config.LOGTAG,"copy image ("+image.toString()+") to private storage "+file.getAbsolutePath());
370		copyImageToPrivateStorage(file, image, 0);
371	}
372
373	public void copyImageToPrivateStorage(Message message, Uri image) throws FileCopyException {
374		switch(Config.IMAGE_FORMAT) {
375			case JPEG:
376				message.setRelativeFilePath(message.getUuid()+".jpg");
377				break;
378			case PNG:
379				message.setRelativeFilePath(message.getUuid()+".png");
380				break;
381			case WEBP:
382				message.setRelativeFilePath(message.getUuid()+".webp");
383				break;
384		}
385		copyImageToPrivateStorage(getFile(message), image);
386		updateFileParams(message);
387	}
388
389	private int getRotation(File file) {
390		return getRotation(Uri.parse("file://"+file.getAbsolutePath()));
391	}
392
393	private int getRotation(Uri image) {
394		InputStream is = null;
395		try {
396			is = mXmppConnectionService.getContentResolver().openInputStream(image);
397			return ExifHelper.getOrientation(is);
398		} catch (FileNotFoundException e) {
399			return 0;
400		} finally {
401			close(is);
402		}
403	}
404
405	public Bitmap getThumbnail(Message message, int size, boolean cacheOnly) throws FileNotFoundException {
406		final String uuid = message.getUuid();
407		final LruCache<String,Bitmap> cache = mXmppConnectionService.getBitmapCache();
408		Bitmap thumbnail = cache.get(uuid);
409		if ((thumbnail == null) && (!cacheOnly)) {
410			synchronized (cache) {
411				thumbnail = cache.get(uuid);
412				if (thumbnail != null) {
413					return thumbnail;
414				}
415				DownloadableFile file = getFile(message);
416				final String mime = file.getMimeType();
417				if (mime.startsWith("video/")) {
418					thumbnail = getVideoPreview(file, size);
419				} else {
420					Bitmap fullsize = getFullsizeImagePreview(file, size);
421					if (fullsize == null) {
422						throw new FileNotFoundException();
423					}
424					thumbnail = resize(fullsize, size);
425					thumbnail = rotate(thumbnail, getRotation(file));
426					if (mime.equals("image/gif")) {
427						Bitmap withGifOverlay = thumbnail.copy(Bitmap.Config.ARGB_8888,true);
428						drawOverlay(withGifOverlay,R.drawable.play_gif,1.0f);
429						thumbnail.recycle();
430						thumbnail = withGifOverlay;
431					}
432				}
433				this.mXmppConnectionService.getBitmapCache().put(uuid, thumbnail);
434			}
435		}
436		return thumbnail;
437	}
438
439	private Bitmap getFullsizeImagePreview(File file, int size) {
440		BitmapFactory.Options options = new BitmapFactory.Options();
441		options.inSampleSize = calcSampleSize(file, size);
442		try {
443			return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
444		} catch (OutOfMemoryError e) {
445			options.inSampleSize *= 2;
446			return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
447		}
448	}
449
450	private void drawOverlay(Bitmap bitmap, int resource, float factor) {
451		Bitmap overlay = BitmapFactory.decodeResource(mXmppConnectionService.getResources(), resource);
452		Canvas canvas = new Canvas(bitmap);
453		Paint paint = new Paint();
454		paint.setAntiAlias(true);
455		paint.setFilterBitmap(true);
456		paint.setDither(true);
457		float targetSize = Math.min(canvas.getWidth(),canvas.getHeight()) * factor;
458		Log.d(Config.LOGTAG,"target size overlay: "+targetSize+" overlay bitmap size was "+overlay.getHeight());
459		float left = (canvas.getWidth() - targetSize) / 2.0f;
460		float top = (canvas.getHeight() - targetSize) / 2.0f;
461		RectF dst = new RectF(left,top,left+targetSize-1,top+targetSize-1);
462		canvas.drawBitmap(overlay,null,dst,paint);
463	}
464
465	private Bitmap getVideoPreview(File file, int size) {
466		MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
467		Bitmap frame;
468		try {
469			metadataRetriever.setDataSource(file.getAbsolutePath());
470			frame = metadataRetriever.getFrameAtTime(0);
471			metadataRetriever.release();
472			frame = resize(frame, size);
473		} catch(IllegalArgumentException  | NullPointerException e) {
474			frame = Bitmap.createBitmap(size,size, Bitmap.Config.ARGB_8888);
475			frame.eraseColor(0xff000000);
476		}
477		drawOverlay(frame,R.drawable.play_video,0.75f);
478		return frame;
479	}
480
481	private static String getTakePhotoPath() {
482		return Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM)+"/Camera/";
483	}
484
485	public Uri getTakePhotoUri() {
486		File file;
487		if (Config.ONLY_INTERNAL_STORAGE) {
488			file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath(), "Camera/IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
489		} else {
490			file = new File(getTakePhotoPath() + "IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
491		}
492		file.getParentFile().mkdirs();
493		return getUriForFile(mXmppConnectionService,file);
494	}
495
496	public static Uri getUriForFile(Context context, File file) {
497		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N || Config.ONLY_INTERNAL_STORAGE) {
498			try {
499				String packageId = context.getPackageName();
500				return FileProvider.getUriForFile(context, packageId + FILE_PROVIDER, file);
501			} catch(IllegalArgumentException e) {
502				if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
503					throw new SecurityException();
504				} else {
505					return Uri.fromFile(file);
506				}
507			}
508		} else {
509			return Uri.fromFile(file);
510		}
511	}
512
513	public static Uri getIndexableTakePhotoUri(Uri original) {
514		if (Config.ONLY_INTERNAL_STORAGE || "file".equals(original.getScheme())) {
515			return original;
516		} else {
517			List<String> segments = original.getPathSegments();
518			return Uri.parse("file://"+getTakePhotoPath()+segments.get(segments.size() - 1));
519		}
520	}
521
522	public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
523		try {
524			Avatar avatar = new Avatar();
525			Bitmap bm = cropCenterSquare(image, size);
526			if (bm == null) {
527				return null;
528			}
529			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
530			Base64OutputStream mBase64OutputStream = new Base64OutputStream(
531					mByteArrayOutputStream, Base64.DEFAULT);
532			MessageDigest digest = MessageDigest.getInstance("SHA-1");
533			DigestOutputStream mDigestOutputStream = new DigestOutputStream(
534					mBase64OutputStream, digest);
535			if (!bm.compress(format, 75, mDigestOutputStream)) {
536				return null;
537			}
538			mDigestOutputStream.flush();
539			mDigestOutputStream.close();
540			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
541			avatar.image = new String(mByteArrayOutputStream.toByteArray());
542			return avatar;
543		} catch (NoSuchAlgorithmException e) {
544			return null;
545		} catch (IOException e) {
546			return null;
547		}
548	}
549
550	public Avatar getStoredPepAvatar(String hash) {
551		if (hash == null) {
552			return null;
553		}
554		Avatar avatar = new Avatar();
555		File file = new File(getAvatarPath(hash));
556		FileInputStream is = null;
557		try {
558			BitmapFactory.Options options = new BitmapFactory.Options();
559			options.inJustDecodeBounds = true;
560			BitmapFactory.decodeFile(file.getAbsolutePath(), options);
561			is = new FileInputStream(file);
562			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
563			Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
564			MessageDigest digest = MessageDigest.getInstance("SHA-1");
565			DigestOutputStream os = new DigestOutputStream(mBase64OutputStream, digest);
566			byte[] buffer = new byte[4096];
567			int length;
568			while ((length = is.read(buffer)) > 0) {
569				os.write(buffer, 0, length);
570			}
571			os.flush();
572			os.close();
573			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
574			avatar.image = new String(mByteArrayOutputStream.toByteArray());
575			avatar.height = options.outHeight;
576			avatar.width = options.outWidth;
577			return avatar;
578		} catch (IOException e) {
579			return null;
580		} catch (NoSuchAlgorithmException e) {
581			return null;
582		} finally {
583			close(is);
584		}
585	}
586
587	public boolean isAvatarCached(Avatar avatar) {
588		File file = new File(getAvatarPath(avatar.getFilename()));
589		return file.exists();
590	}
591
592	public boolean save(Avatar avatar) {
593		File file;
594		if (isAvatarCached(avatar)) {
595			file = new File(getAvatarPath(avatar.getFilename()));
596		} else {
597			String filename = getAvatarPath(avatar.getFilename());
598			file = new File(filename + ".tmp");
599			file.getParentFile().mkdirs();
600			OutputStream os = null;
601			try {
602				file.createNewFile();
603				os = new FileOutputStream(file);
604				MessageDigest digest = MessageDigest.getInstance("SHA-1");
605				digest.reset();
606				DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
607				mDigestOutputStream.write(avatar.getImageAsBytes());
608				mDigestOutputStream.flush();
609				mDigestOutputStream.close();
610				String sha1sum = CryptoHelper.bytesToHex(digest.digest());
611				if (sha1sum.equals(avatar.sha1sum)) {
612					file.renameTo(new File(filename));
613				} else {
614					Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
615					file.delete();
616					return false;
617				}
618			} catch (IllegalArgumentException | IOException | NoSuchAlgorithmException e) {
619				return false;
620			} finally {
621				close(os);
622			}
623		}
624		avatar.size = file.length();
625		return true;
626	}
627
628	public String getAvatarPath(String avatar) {
629		return mXmppConnectionService.getFilesDir().getAbsolutePath()+ "/avatars/" + avatar;
630	}
631
632	public Uri getAvatarUri(String avatar) {
633		return Uri.parse("file:" + getAvatarPath(avatar));
634	}
635
636	public Bitmap cropCenterSquare(Uri image, int size) {
637		if (image == null) {
638			return null;
639		}
640		InputStream is = null;
641		try {
642			BitmapFactory.Options options = new BitmapFactory.Options();
643			options.inSampleSize = calcSampleSize(image, size);
644			is = mXmppConnectionService.getContentResolver().openInputStream(image);
645			if (is == null) {
646				return null;
647			}
648			Bitmap input = BitmapFactory.decodeStream(is, null, options);
649			if (input == null) {
650				return null;
651			} else {
652				input = rotate(input, getRotation(image));
653				return cropCenterSquare(input, size);
654			}
655		} catch (SecurityException e) {
656			return null; // happens for example on Android 6.0 if contacts permissions get revoked
657		} catch (FileNotFoundException e) {
658			return null;
659		} finally {
660			close(is);
661		}
662	}
663
664	public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
665		if (image == null) {
666			return null;
667		}
668		InputStream is = null;
669		try {
670			BitmapFactory.Options options = new BitmapFactory.Options();
671			options.inSampleSize = calcSampleSize(image, Math.max(newHeight, newWidth));
672			is = mXmppConnectionService.getContentResolver().openInputStream(image);
673			if (is == null) {
674				return null;
675			}
676			Bitmap source = BitmapFactory.decodeStream(is, null, options);
677			if (source == null) {
678				return null;
679			}
680			int sourceWidth = source.getWidth();
681			int sourceHeight = source.getHeight();
682			float xScale = (float) newWidth / sourceWidth;
683			float yScale = (float) newHeight / sourceHeight;
684			float scale = Math.max(xScale, yScale);
685			float scaledWidth = scale * sourceWidth;
686			float scaledHeight = scale * sourceHeight;
687			float left = (newWidth - scaledWidth) / 2;
688			float top = (newHeight - scaledHeight) / 2;
689
690			RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
691			Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
692			Canvas canvas = new Canvas(dest);
693			canvas.drawBitmap(source, null, targetRect, null);
694			if (source != null && !source.isRecycled()) {
695				source.recycle();
696			}
697			return dest;
698		} catch (SecurityException e) {
699			return null; //android 6.0 with revoked permissions for example
700		} catch (FileNotFoundException e) {
701			return null;
702		} finally {
703			close(is);
704		}
705	}
706
707	public Bitmap cropCenterSquare(Bitmap input, int size) {
708		int w = input.getWidth();
709		int h = input.getHeight();
710
711		float scale = Math.max((float) size / h, (float) size / w);
712
713		float outWidth = scale * w;
714		float outHeight = scale * h;
715		float left = (size - outWidth) / 2;
716		float top = (size - outHeight) / 2;
717		RectF target = new RectF(left, top, left + outWidth, top + outHeight);
718
719		Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
720		Canvas canvas = new Canvas(output);
721		canvas.drawBitmap(input, null, target, null);
722		if (input != null && !input.isRecycled()) {
723			input.recycle();
724		}
725		return output;
726	}
727
728	private int calcSampleSize(Uri image, int size) throws FileNotFoundException, SecurityException {
729		BitmapFactory.Options options = new BitmapFactory.Options();
730		options.inJustDecodeBounds = true;
731		BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
732		return calcSampleSize(options, size);
733	}
734
735	private static int calcSampleSize(File image, int size) {
736		BitmapFactory.Options options = new BitmapFactory.Options();
737		options.inJustDecodeBounds = true;
738		BitmapFactory.decodeFile(image.getAbsolutePath(), options);
739		return calcSampleSize(options, size);
740	}
741
742	public static int calcSampleSize(BitmapFactory.Options options, int size) {
743		int height = options.outHeight;
744		int width = options.outWidth;
745		int inSampleSize = 1;
746
747		if (height > size || width > size) {
748			int halfHeight = height / 2;
749			int halfWidth = width / 2;
750
751			while ((halfHeight / inSampleSize) > size
752					&& (halfWidth / inSampleSize) > size) {
753				inSampleSize *= 2;
754			}
755		}
756		return inSampleSize;
757	}
758
759	public void updateFileParams(Message message) {
760		updateFileParams(message,null);
761	}
762
763	public void updateFileParams(Message message, URL url) {
764		DownloadableFile file = getFile(message);
765		final String mime = file.getMimeType();
766		boolean image = message.getType() == Message.TYPE_IMAGE || (mime != null && mime.startsWith("image/"));
767		boolean video = mime != null && mime.startsWith("video/");
768		if (image || video) {
769			try {
770				Dimensions dimensions = image ? getImageDimensions(file) : getVideoDimensions(file);
771				if (url == null) {
772					message.setBody(Long.toString(file.getSize()) + '|' + dimensions.width + '|' + dimensions.height);
773				} else {
774					message.setBody(url.toString() + "|" + Long.toString(file.getSize()) + '|' + dimensions.width + '|' + dimensions.height);
775				}
776				return;
777			} catch (NotAVideoFile notAVideoFile) {
778				Log.d(Config.LOGTAG,"file with mime type "+file.getMimeType()+" was not a video file");
779				//fall threw
780			}
781		}
782		if (url != null) {
783			message.setBody(url.toString()+"|"+Long.toString(file.getSize()));
784		} else {
785			message.setBody(Long.toString(file.getSize()));
786		}
787
788	}
789
790	private Dimensions getImageDimensions(File file) {
791		BitmapFactory.Options options = new BitmapFactory.Options();
792		options.inJustDecodeBounds = true;
793		BitmapFactory.decodeFile(file.getAbsolutePath(), options);
794		int rotation = getRotation(file);
795		boolean rotated = rotation == 90 || rotation == 270;
796		int imageHeight = rotated ? options.outWidth : options.outHeight;
797		int imageWidth = rotated ? options.outHeight : options.outWidth;
798		return new Dimensions(imageHeight, imageWidth);
799	}
800
801	private Dimensions getVideoDimensions(File file) throws NotAVideoFile {
802		MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
803		try {
804			metadataRetriever.setDataSource(file.getAbsolutePath());
805		} catch (Exception e) {
806			throw new NotAVideoFile();
807		}
808		String hasVideo = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_HAS_VIDEO);
809		if (hasVideo == null) {
810			throw new NotAVideoFile();
811		}
812		int rotation = extractRotationFromMediaRetriever(metadataRetriever);
813		boolean rotated = rotation == 90 || rotation == 270;
814		int height;
815		try {
816			String h = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
817			height = Integer.parseInt(h);
818		} catch (Exception e) {
819			height = -1;
820		}
821		int width;
822		try {
823			String w = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
824			width = Integer.parseInt(w);
825		} catch (Exception e) {
826			width = -1;
827		}
828		metadataRetriever.release();
829		Log.d(Config.LOGTAG,"extracted video dims "+width+"x"+height);
830		return rotated ? new Dimensions(width, height) : new Dimensions(height, width);
831	}
832
833	private int extractRotationFromMediaRetriever(MediaMetadataRetriever metadataRetriever) {
834		int rotation;
835		if (Build.VERSION.SDK_INT >= 17) {
836			String r = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
837			try {
838				rotation = Integer.parseInt(r);
839			} catch (Exception e) {
840				rotation = 0;
841			}
842		} else {
843			rotation = 0;
844		}
845		return rotation;
846	}
847
848	private class Dimensions {
849		public final int width;
850		public final int height;
851
852		public Dimensions(int height, int width) {
853			this.width = width;
854			this.height = height;
855		}
856	}
857
858	private class NotAVideoFile extends Exception {
859
860	}
861
862	public class FileCopyException extends Exception {
863		private static final long serialVersionUID = -1010013599132881427L;
864		private int resId;
865
866		public FileCopyException(int resId) {
867			this.resId = resId;
868		}
869
870		public int getResId() {
871			return resId;
872		}
873	}
874
875	public Bitmap getAvatar(String avatar, int size) {
876		if (avatar == null) {
877			return null;
878		}
879		Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
880		if (bm == null) {
881			return null;
882		}
883		return bm;
884	}
885
886	public boolean isFileAvailable(Message message) {
887		return getFile(message).exists();
888	}
889
890	public static void close(Closeable stream) {
891		if (stream != null) {
892			try {
893				stream.close();
894			} catch (IOException e) {
895			}
896		}
897	}
898
899	public static void close(Socket socket) {
900		if (socket != null) {
901			try {
902				socket.close();
903			} catch (IOException e) {
904			}
905		}
906	}
907
908
909	public static boolean weOwnFile(Context context, Uri uri) {
910		if (uri == null || !ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {
911			return false;
912		} else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
913			return fileIsInFilesDir(context, uri);
914		} else {
915			return weOwnFileLollipop(uri);
916		}
917	}
918
919
920	/**
921	 * This is more than hacky but probably way better than doing nothing
922	 * Further 'optimizations' might contain to get the parents of CacheDir and NoBackupDir
923	 * and check against those as well
924	 */
925	private static boolean fileIsInFilesDir(Context context, Uri uri) {
926		try {
927			final String haystack = context.getFilesDir().getParentFile().getCanonicalPath();
928			final String needle = new File(uri.getPath()).getCanonicalPath();
929			return needle.startsWith(haystack);
930		} catch (IOException e) {
931			return false;
932		}
933	}
934
935	@TargetApi(Build.VERSION_CODES.LOLLIPOP)
936	private static boolean weOwnFileLollipop(Uri uri) {
937		try {
938			File file = new File(uri.getPath());
939			FileDescriptor fd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY).getFileDescriptor();
940			StructStat st = Os.fstat(fd);
941			return st.st_uid == android.os.Process.myUid();
942		} catch (FileNotFoundException e) {
943			return false;
944		} catch (Exception e) {
945			return true;
946		}
947	}
948}