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
 64	private static final Object THUMBNAIL_LOCK = new Object();
 65
 66	private static final SimpleDateFormat IMAGE_DATE_FORMAT = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US);
 67
 68	public static final String FILE_PROVIDER = ".files";
 69
 70	private XmppConnectionService mXmppConnectionService;
 71
 72	public FileBackend(XmppConnectionService service) {
 73		this.mXmppConnectionService = service;
 74	}
 75
 76	private void createNoMedia() {
 77		final File nomedia = new File(getConversationsDirectory("Files")+".nomedia");
 78		if (!nomedia.exists()) {
 79			try {
 80				nomedia.createNewFile();
 81			} catch (Exception e) {
 82				Log.d(Config.LOGTAG, "could not create nomedia file");
 83			}
 84		}
 85	}
 86
 87	public void updateMediaScanner(File file) {
 88		String path = file.getAbsolutePath();
 89		if (!path.startsWith(getConversationsDirectory("Files"))) {
 90			Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
 91			intent.setData(Uri.fromFile(file));
 92			mXmppConnectionService.sendBroadcast(intent);
 93		} else {
 94			createNoMedia();
 95		}
 96	}
 97
 98	public boolean deleteFile(Message message) {
 99		File file = getFile(message);
100		if (file.delete()) {
101			updateMediaScanner(file);
102			return true;
103		} else {
104			return false;
105		}
106	}
107
108	public DownloadableFile getFile(Message message) {
109		return getFile(message, true);
110	}
111
112	public DownloadableFile getFile(Message message, boolean decrypted) {
113		final boolean encrypted = !decrypted
114				&& (message.getEncryption() == Message.ENCRYPTION_PGP
115				|| message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
116		final DownloadableFile file;
117		String path = message.getRelativeFilePath();
118		if (path == null) {
119			path = message.getUuid();
120		}
121		if (path.startsWith("/")) {
122			file = new DownloadableFile(path);
123		} else {
124			String mime = message.getMimeType();
125			if (mime != null && mime.startsWith("image/")) {
126				file = new DownloadableFile(getConversationsDirectory("Images") + path);
127			} else if (mime != null && mime.startsWith("video/")) {
128				file = new DownloadableFile(getConversationsDirectory("Videos") + path);
129			} else {
130				file = new DownloadableFile(getConversationsDirectory("Files") + path);
131			}
132		}
133		if (encrypted) {
134			return new DownloadableFile(getConversationsDirectory("Files") + file.getName() + ".pgp");
135		} else {
136			return file;
137		}
138	}
139
140	public static long getFileSize(Context context, Uri uri) {
141		try {
142			final Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
143			if (cursor != null && cursor.moveToFirst()) {
144				long size = cursor.getLong(cursor.getColumnIndex(OpenableColumns.SIZE));
145				cursor.close();
146				return size;
147			} else {
148				return -1;
149			}
150		} catch (Exception e) {
151			return -1;
152		}
153	}
154
155	public static boolean allFilesUnderSize(Context context, List<Uri> uris, long max) {
156		if (max <= 0) {
157			Log.d(Config.LOGTAG,"server did not report max file size for http upload");
158			return true; //exception to be compatible with HTTP Upload < v0.2
159		}
160		for(Uri uri : uris) {
161			String mime = context.getContentResolver().getType(uri);
162			if (mime != null && mime.startsWith("video/")) {
163				try {
164					Dimensions dimensions = FileBackend.getVideoDimensions(context,uri);
165					if (dimensions.getMin() > 720) {
166						Log.d(Config.LOGTAG,"do not consider video file with min width larger than 720 for size check");
167						continue;
168					}
169				} catch (NotAVideoFile notAVideoFile) {
170					//ignore and fall through
171				}
172			}
173			if (FileBackend.getFileSize(context, uri) > max) {
174				Log.d(Config.LOGTAG,"not all files are under "+max+" bytes. suggesting falling back to jingle");
175				return false;
176			}
177		}
178		return true;
179	}
180
181	public String getConversationsDirectory(final String type) {
182		if (Config.ONLY_INTERNAL_STORAGE) {
183			return mXmppConnectionService.getFilesDir().getAbsolutePath()+"/"+type+"/";
184		} else {
185			return Environment.getExternalStorageDirectory() +"/Conversations/Media/Conversations "+type+"/";
186		}
187	}
188
189	public static String getConversationsLogsDirectory() {
190		return  Environment.getExternalStorageDirectory().getAbsolutePath()+"/Conversations/";
191	}
192
193	public Bitmap resize(Bitmap originalBitmap, int size) {
194		int w = originalBitmap.getWidth();
195		int h = originalBitmap.getHeight();
196		if (Math.max(w, h) > size) {
197			int scalledW;
198			int scalledH;
199			if (w <= h) {
200				scalledW = (int) (w / ((double) h / size));
201				scalledH = size;
202			} else {
203				scalledW = size;
204				scalledH = (int) (h / ((double) w / size));
205			}
206			Bitmap result = Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
207			if (originalBitmap != null && !originalBitmap.isRecycled()) {
208				originalBitmap.recycle();
209			}
210			return result;
211		} else {
212			return originalBitmap;
213		}
214	}
215
216	public static Bitmap rotate(Bitmap bitmap, int degree) {
217		if (degree == 0) {
218			return bitmap;
219		}
220		int w = bitmap.getWidth();
221		int h = bitmap.getHeight();
222		Matrix mtx = new Matrix();
223		mtx.postRotate(degree);
224		Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
225		if (bitmap != null && !bitmap.isRecycled()) {
226			bitmap.recycle();
227		}
228		return result;
229	}
230
231	public boolean useImageAsIs(Uri uri) {
232		String path = getOriginalPath(uri);
233		if (path == null) {
234			return false;
235		}
236		File file = new File(path);
237		long size = file.length();
238		if (size == 0 || size >= mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize)) {
239			return false;
240		}
241		BitmapFactory.Options options = new BitmapFactory.Options();
242		options.inJustDecodeBounds = true;
243		try {
244			BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri), null, options);
245			if (options.outMimeType == null || options.outHeight <= 0 || options.outWidth <= 0) {
246				return false;
247			}
248			return (options.outWidth <= Config.IMAGE_SIZE && options.outHeight <= Config.IMAGE_SIZE && options.outMimeType.contains(Config.IMAGE_FORMAT.name().toLowerCase()));
249		} catch (FileNotFoundException e) {
250			return false;
251		}
252	}
253
254	public String getOriginalPath(Uri uri) {
255		return FileUtils.getPath(mXmppConnectionService,uri);
256	}
257
258	public void copyFileToPrivateStorage(File file, Uri uri) throws FileCopyException {
259		Log.d(Config.LOGTAG,"copy file ("+uri.toString()+") to private storage "+file.getAbsolutePath());
260		file.getParentFile().mkdirs();
261		OutputStream os = null;
262		InputStream is = null;
263		try {
264			file.createNewFile();
265			os = new FileOutputStream(file);
266			is = mXmppConnectionService.getContentResolver().openInputStream(uri);
267			byte[] buffer = new byte[1024];
268			int length;
269			while ((length = is.read(buffer)) > 0) {
270				try {
271					os.write(buffer, 0, length);
272				} catch (IOException e) {
273					throw new FileWriterException();
274				}
275			}
276			try {
277				os.flush();
278			} catch (IOException e) {
279				throw new FileWriterException();
280			}
281		} catch(FileNotFoundException e) {
282			throw new FileCopyException(R.string.error_file_not_found);
283		} catch(FileWriterException e) {
284			throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
285		} catch (IOException e) {
286			e.printStackTrace();
287			throw new FileCopyException(R.string.error_io_exception);
288		} finally {
289			close(os);
290			close(is);
291		}
292	}
293
294	public void copyFileToPrivateStorage(Message message, Uri uri) throws FileCopyException {
295		String mime = MimeUtils.guessMimeTypeFromUri(mXmppConnectionService, uri);
296		Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage (mime="+mime+")");
297		String extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mime);
298		if (extension == null) {
299			extension = getExtensionFromUri(uri);
300		}
301		message.setRelativeFilePath(message.getUuid() + "." + extension);
302		copyFileToPrivateStorage(mXmppConnectionService.getFileBackend().getFile(message), uri);
303	}
304
305	private String getExtensionFromUri(Uri uri) {
306		String[] projection = {MediaStore.MediaColumns.DATA};
307		String filename = null;
308		Cursor cursor = mXmppConnectionService.getContentResolver().query(uri, projection, null, null, null);
309		if (cursor != null) {
310			try {
311				if (cursor.moveToFirst()) {
312					filename = cursor.getString(0);
313				}
314			} catch (Exception e) {
315				filename = null;
316			} finally {
317				cursor.close();
318			}
319		}
320		int pos = filename == null ? -1 : filename.lastIndexOf('.');
321		return pos > 0 ? filename.substring(pos+1) : null;
322	}
323
324	private void copyImageToPrivateStorage(File file, Uri image, int sampleSize) throws FileCopyException {
325		file.getParentFile().mkdirs();
326		InputStream is = null;
327		OutputStream os = null;
328		try {
329			if (!file.exists() && !file.createNewFile()) {
330				throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
331			}
332			is = mXmppConnectionService.getContentResolver().openInputStream(image);
333			if (is == null) {
334				throw new FileCopyException(R.string.error_not_an_image_file);
335			}
336			Bitmap originalBitmap;
337			BitmapFactory.Options options = new BitmapFactory.Options();
338			int inSampleSize = (int) Math.pow(2, sampleSize);
339			Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
340			options.inSampleSize = inSampleSize;
341			originalBitmap = BitmapFactory.decodeStream(is, null, options);
342			is.close();
343			if (originalBitmap == null) {
344				throw new FileCopyException(R.string.error_not_an_image_file);
345			}
346			Bitmap scaledBitmap = resize(originalBitmap, Config.IMAGE_SIZE);
347			int rotation = getRotation(image);
348			scaledBitmap = rotate(scaledBitmap, rotation);
349			boolean targetSizeReached = false;
350			int quality = Config.IMAGE_QUALITY;
351			final int imageMaxSize = mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize);
352			while(!targetSizeReached) {
353				os = new FileOutputStream(file);
354				boolean success = scaledBitmap.compress(Config.IMAGE_FORMAT, quality, os);
355				if (!success) {
356					throw new FileCopyException(R.string.error_compressing_image);
357				}
358				os.flush();
359				targetSizeReached = file.length() <= imageMaxSize|| quality <= 50;
360				quality -= 5;
361			}
362			scaledBitmap.recycle();
363		} catch (FileNotFoundException e) {
364			throw new FileCopyException(R.string.error_file_not_found);
365		} catch (IOException e) {
366			e.printStackTrace();
367			throw new FileCopyException(R.string.error_io_exception);
368		} catch (SecurityException e) {
369			throw new FileCopyException(R.string.error_security_exception_during_image_copy);
370		} catch (OutOfMemoryError e) {
371			++sampleSize;
372			if (sampleSize <= 3) {
373				copyImageToPrivateStorage(file, image, sampleSize);
374			} else {
375				throw new FileCopyException(R.string.error_out_of_memory);
376			}
377		} finally {
378			close(os);
379			close(is);
380		}
381	}
382
383	public void copyImageToPrivateStorage(File file, Uri image) throws FileCopyException {
384		Log.d(Config.LOGTAG,"copy image ("+image.toString()+") to private storage "+file.getAbsolutePath());
385		copyImageToPrivateStorage(file, image, 0);
386	}
387
388	public void copyImageToPrivateStorage(Message message, Uri image) throws FileCopyException {
389		switch(Config.IMAGE_FORMAT) {
390			case JPEG:
391				message.setRelativeFilePath(message.getUuid()+".jpg");
392				break;
393			case PNG:
394				message.setRelativeFilePath(message.getUuid()+".png");
395				break;
396			case WEBP:
397				message.setRelativeFilePath(message.getUuid()+".webp");
398				break;
399		}
400		copyImageToPrivateStorage(getFile(message), image);
401		updateFileParams(message);
402	}
403
404	private int getRotation(File file) {
405		return getRotation(Uri.parse("file://"+file.getAbsolutePath()));
406	}
407
408	private int getRotation(Uri image) {
409		InputStream is = null;
410		try {
411			is = mXmppConnectionService.getContentResolver().openInputStream(image);
412			return ExifHelper.getOrientation(is);
413		} catch (FileNotFoundException e) {
414			return 0;
415		} finally {
416			close(is);
417		}
418	}
419
420	public Bitmap getThumbnail(Message message, int size, boolean cacheOnly) throws FileNotFoundException {
421		final String uuid = message.getUuid();
422		final LruCache<String,Bitmap> cache = mXmppConnectionService.getBitmapCache();
423		Bitmap thumbnail = cache.get(uuid);
424		if ((thumbnail == null) && (!cacheOnly)) {
425			synchronized (THUMBNAIL_LOCK) {
426				thumbnail = cache.get(uuid);
427				if (thumbnail != null) {
428					return thumbnail;
429				}
430				DownloadableFile file = getFile(message);
431				final String mime = file.getMimeType();
432				if (mime.startsWith("video/")) {
433					thumbnail = getVideoPreview(file, size);
434				} else {
435					Bitmap fullsize = getFullsizeImagePreview(file, size);
436					if (fullsize == null) {
437						throw new FileNotFoundException();
438					}
439					thumbnail = resize(fullsize, size);
440					thumbnail = rotate(thumbnail, getRotation(file));
441					if (mime.equals("image/gif")) {
442						Bitmap withGifOverlay = thumbnail.copy(Bitmap.Config.ARGB_8888,true);
443						drawOverlay(withGifOverlay,R.drawable.play_gif,1.0f);
444						thumbnail.recycle();
445						thumbnail = withGifOverlay;
446					}
447				}
448				this.mXmppConnectionService.getBitmapCache().put(uuid, thumbnail);
449			}
450		}
451		return thumbnail;
452	}
453
454	private Bitmap getFullsizeImagePreview(File file, int size) {
455		BitmapFactory.Options options = new BitmapFactory.Options();
456		options.inSampleSize = calcSampleSize(file, size);
457		try {
458			return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
459		} catch (OutOfMemoryError e) {
460			options.inSampleSize *= 2;
461			return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
462		}
463	}
464
465	private void drawOverlay(Bitmap bitmap, int resource, float factor) {
466		Bitmap overlay = BitmapFactory.decodeResource(mXmppConnectionService.getResources(), resource);
467		Canvas canvas = new Canvas(bitmap);
468		Paint paint = new Paint();
469		paint.setAntiAlias(true);
470		paint.setFilterBitmap(true);
471		paint.setDither(true);
472		float targetSize = Math.min(canvas.getWidth(),canvas.getHeight()) * factor;
473		Log.d(Config.LOGTAG,"target size overlay: "+targetSize+" overlay bitmap size was "+overlay.getHeight());
474		float left = (canvas.getWidth() - targetSize) / 2.0f;
475		float top = (canvas.getHeight() - targetSize) / 2.0f;
476		RectF dst = new RectF(left,top,left+targetSize-1,top+targetSize-1);
477		canvas.drawBitmap(overlay,null,dst,paint);
478	}
479
480	private Bitmap getVideoPreview(File file, int size) {
481		MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
482		Bitmap frame;
483		try {
484			metadataRetriever.setDataSource(file.getAbsolutePath());
485			frame = metadataRetriever.getFrameAtTime(0);
486			metadataRetriever.release();
487			frame = resize(frame, size);
488		} catch(IllegalArgumentException  | NullPointerException e) {
489			frame = Bitmap.createBitmap(size,size, Bitmap.Config.ARGB_8888);
490			frame.eraseColor(0xff000000);
491		}
492		drawOverlay(frame,R.drawable.play_video,0.75f);
493		return frame;
494	}
495
496	private static String getTakePhotoPath() {
497		return Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM)+"/Camera/";
498	}
499
500	public Uri getTakePhotoUri() {
501		File file;
502		if (Config.ONLY_INTERNAL_STORAGE) {
503			file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath(), "Camera/IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
504		} else {
505			file = new File(getTakePhotoPath() + "IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
506		}
507		file.getParentFile().mkdirs();
508		return getUriForFile(mXmppConnectionService,file);
509	}
510
511	public static Uri getUriForFile(Context context, File file) {
512		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N || Config.ONLY_INTERNAL_STORAGE) {
513			try {
514				String packageId = context.getPackageName();
515				return FileProvider.getUriForFile(context, packageId + FILE_PROVIDER, file);
516			} catch(IllegalArgumentException e) {
517				if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
518					throw new SecurityException();
519				} else {
520					return Uri.fromFile(file);
521				}
522			}
523		} else {
524			return Uri.fromFile(file);
525		}
526	}
527
528	public static Uri getIndexableTakePhotoUri(Uri original) {
529		if (Config.ONLY_INTERNAL_STORAGE || "file".equals(original.getScheme())) {
530			return original;
531		} else {
532			List<String> segments = original.getPathSegments();
533			return Uri.parse("file://"+getTakePhotoPath()+segments.get(segments.size() - 1));
534		}
535	}
536
537	public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
538		try {
539			Avatar avatar = new Avatar();
540			Bitmap bm = cropCenterSquare(image, size);
541			if (bm == null) {
542				return null;
543			}
544			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
545			Base64OutputStream mBase64OutputStream = new Base64OutputStream(
546					mByteArrayOutputStream, Base64.DEFAULT);
547			MessageDigest digest = MessageDigest.getInstance("SHA-1");
548			DigestOutputStream mDigestOutputStream = new DigestOutputStream(
549					mBase64OutputStream, digest);
550			if (!bm.compress(format, 75, mDigestOutputStream)) {
551				return null;
552			}
553			mDigestOutputStream.flush();
554			mDigestOutputStream.close();
555			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
556			avatar.image = new String(mByteArrayOutputStream.toByteArray());
557			return avatar;
558		} catch (NoSuchAlgorithmException e) {
559			return null;
560		} catch (IOException e) {
561			return null;
562		}
563	}
564
565	public Avatar getStoredPepAvatar(String hash) {
566		if (hash == null) {
567			return null;
568		}
569		Avatar avatar = new Avatar();
570		File file = new File(getAvatarPath(hash));
571		FileInputStream is = null;
572		try {
573			avatar.size = file.length();
574			BitmapFactory.Options options = new BitmapFactory.Options();
575			options.inJustDecodeBounds = true;
576			BitmapFactory.decodeFile(file.getAbsolutePath(), options);
577			is = new FileInputStream(file);
578			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
579			Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
580			MessageDigest digest = MessageDigest.getInstance("SHA-1");
581			DigestOutputStream os = new DigestOutputStream(mBase64OutputStream, digest);
582			byte[] buffer = new byte[4096];
583			int length;
584			while ((length = is.read(buffer)) > 0) {
585				os.write(buffer, 0, length);
586			}
587			os.flush();
588			os.close();
589			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
590			avatar.image = new String(mByteArrayOutputStream.toByteArray());
591			avatar.height = options.outHeight;
592			avatar.width = options.outWidth;
593			avatar.type = options.outMimeType;
594			return avatar;
595		} catch (IOException e) {
596			return null;
597		} catch (NoSuchAlgorithmException e) {
598			return null;
599		} finally {
600			close(is);
601		}
602	}
603
604	public boolean isAvatarCached(Avatar avatar) {
605		File file = new File(getAvatarPath(avatar.getFilename()));
606		return file.exists();
607	}
608
609	public boolean save(Avatar avatar) {
610		File file;
611		if (isAvatarCached(avatar)) {
612			file = new File(getAvatarPath(avatar.getFilename()));
613			avatar.size = file.length();
614		} else {
615			String filename = getAvatarPath(avatar.getFilename());
616			file = new File(filename + ".tmp");
617			file.getParentFile().mkdirs();
618			OutputStream os = null;
619			try {
620				file.createNewFile();
621				os = new FileOutputStream(file);
622				MessageDigest digest = MessageDigest.getInstance("SHA-1");
623				digest.reset();
624				DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
625				final byte[] bytes = avatar.getImageAsBytes();
626				mDigestOutputStream.write(bytes);
627				mDigestOutputStream.flush();
628				mDigestOutputStream.close();
629				String sha1sum = CryptoHelper.bytesToHex(digest.digest());
630				if (sha1sum.equals(avatar.sha1sum)) {
631					file.renameTo(new File(filename));
632				} else {
633					Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
634					file.delete();
635					return false;
636				}
637				avatar.size = bytes.length;
638			} catch (IllegalArgumentException | IOException | NoSuchAlgorithmException e) {
639				return false;
640			} finally {
641				close(os);
642			}
643		}
644		return true;
645	}
646
647	public String getAvatarPath(String avatar) {
648		return mXmppConnectionService.getFilesDir().getAbsolutePath()+ "/avatars/" + avatar;
649	}
650
651	public Uri getAvatarUri(String avatar) {
652		return Uri.parse("file:" + getAvatarPath(avatar));
653	}
654
655	public Bitmap cropCenterSquare(Uri image, int size) {
656		if (image == null) {
657			return null;
658		}
659		InputStream is = null;
660		try {
661			BitmapFactory.Options options = new BitmapFactory.Options();
662			options.inSampleSize = calcSampleSize(image, size);
663			is = mXmppConnectionService.getContentResolver().openInputStream(image);
664			if (is == null) {
665				return null;
666			}
667			Bitmap input = BitmapFactory.decodeStream(is, null, options);
668			if (input == null) {
669				return null;
670			} else {
671				input = rotate(input, getRotation(image));
672				return cropCenterSquare(input, size);
673			}
674		} catch (SecurityException e) {
675			return null; // happens for example on Android 6.0 if contacts permissions get revoked
676		} catch (FileNotFoundException e) {
677			return null;
678		} finally {
679			close(is);
680		}
681	}
682
683	public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
684		if (image == null) {
685			return null;
686		}
687		InputStream is = null;
688		try {
689			BitmapFactory.Options options = new BitmapFactory.Options();
690			options.inSampleSize = calcSampleSize(image, Math.max(newHeight, newWidth));
691			is = mXmppConnectionService.getContentResolver().openInputStream(image);
692			if (is == null) {
693				return null;
694			}
695			Bitmap source = BitmapFactory.decodeStream(is, null, options);
696			if (source == null) {
697				return null;
698			}
699			int sourceWidth = source.getWidth();
700			int sourceHeight = source.getHeight();
701			float xScale = (float) newWidth / sourceWidth;
702			float yScale = (float) newHeight / sourceHeight;
703			float scale = Math.max(xScale, yScale);
704			float scaledWidth = scale * sourceWidth;
705			float scaledHeight = scale * sourceHeight;
706			float left = (newWidth - scaledWidth) / 2;
707			float top = (newHeight - scaledHeight) / 2;
708
709			RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
710			Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
711			Canvas canvas = new Canvas(dest);
712			canvas.drawBitmap(source, null, targetRect, null);
713			if (source.isRecycled()) {
714				source.recycle();
715			}
716			return dest;
717		} catch (SecurityException e) {
718			return null; //android 6.0 with revoked permissions for example
719		} catch (FileNotFoundException e) {
720			return null;
721		} finally {
722			close(is);
723		}
724	}
725
726	public Bitmap cropCenterSquare(Bitmap input, int size) {
727		int w = input.getWidth();
728		int h = input.getHeight();
729
730		float scale = Math.max((float) size / h, (float) size / w);
731
732		float outWidth = scale * w;
733		float outHeight = scale * h;
734		float left = (size - outWidth) / 2;
735		float top = (size - outHeight) / 2;
736		RectF target = new RectF(left, top, left + outWidth, top + outHeight);
737
738		Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
739		Canvas canvas = new Canvas(output);
740		canvas.drawBitmap(input, null, target, null);
741		if (input != null && !input.isRecycled()) {
742			input.recycle();
743		}
744		return output;
745	}
746
747	private int calcSampleSize(Uri image, int size) throws FileNotFoundException, SecurityException {
748		BitmapFactory.Options options = new BitmapFactory.Options();
749		options.inJustDecodeBounds = true;
750		BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
751		return calcSampleSize(options, size);
752	}
753
754	private static int calcSampleSize(File image, int size) {
755		BitmapFactory.Options options = new BitmapFactory.Options();
756		options.inJustDecodeBounds = true;
757		BitmapFactory.decodeFile(image.getAbsolutePath(), options);
758		return calcSampleSize(options, size);
759	}
760
761	public static int calcSampleSize(BitmapFactory.Options options, int size) {
762		int height = options.outHeight;
763		int width = options.outWidth;
764		int inSampleSize = 1;
765
766		if (height > size || width > size) {
767			int halfHeight = height / 2;
768			int halfWidth = width / 2;
769
770			while ((halfHeight / inSampleSize) > size
771					&& (halfWidth / inSampleSize) > size) {
772				inSampleSize *= 2;
773			}
774		}
775		return inSampleSize;
776	}
777
778	public void updateFileParams(Message message) {
779		updateFileParams(message,null);
780	}
781
782	public void updateFileParams(Message message, URL url) {
783		DownloadableFile file = getFile(message);
784		final String mime = file.getMimeType();
785		boolean image = message.getType() == Message.TYPE_IMAGE || (mime != null && mime.startsWith("image/"));
786		boolean video = mime != null && mime.startsWith("video/");
787		boolean audio = mime != null && mime.startsWith("audio/");
788		final StringBuilder body = new StringBuilder();
789		if (url != null) {
790			body.append(url.toString());
791		}
792		body.append('|').append(file.getSize());
793		if (image || video) {
794			try {
795				Dimensions dimensions = image ? getImageDimensions(file) : getVideoDimensions(file);
796				body.append('|').append(dimensions.width).append('|').append(dimensions.height);
797			} catch (NotAVideoFile notAVideoFile) {
798				Log.d(Config.LOGTAG,"file with mime type "+file.getMimeType()+" was not a video file");
799				//fall threw
800			}
801		} else if (audio) {
802			body.append("|0|0|").append(getMediaRuntime(file));
803		}
804		message.setBody(body.toString());
805	}
806
807	public int getMediaRuntime(Uri uri) {
808		try {
809			MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
810			mediaMetadataRetriever.setDataSource(mXmppConnectionService,uri);
811			return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
812		} catch (IllegalArgumentException e) {
813			return 0;
814		}
815	}
816
817	private int getMediaRuntime(File file) {
818		try {
819			MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
820			mediaMetadataRetriever.setDataSource(file.toString());
821			return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
822		} catch (IllegalArgumentException e) {
823			return 0;
824		}
825	}
826
827	private Dimensions getImageDimensions(File file) {
828		BitmapFactory.Options options = new BitmapFactory.Options();
829		options.inJustDecodeBounds = true;
830		BitmapFactory.decodeFile(file.getAbsolutePath(), options);
831		int rotation = getRotation(file);
832		boolean rotated = rotation == 90 || rotation == 270;
833		int imageHeight = rotated ? options.outWidth : options.outHeight;
834		int imageWidth = rotated ? options.outHeight : options.outWidth;
835		return new Dimensions(imageHeight, imageWidth);
836	}
837
838	private Dimensions getVideoDimensions(File file) throws NotAVideoFile {
839		MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
840		try {
841			metadataRetriever.setDataSource(file.getAbsolutePath());
842		} catch (Exception e) {
843			throw new NotAVideoFile();
844		}
845		return getVideoDimensions(metadataRetriever);
846	}
847
848	private static Dimensions getVideoDimensions(Context context, Uri uri) throws NotAVideoFile {
849		MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
850		mediaMetadataRetriever.setDataSource(context,uri);
851		return getVideoDimensions(mediaMetadataRetriever);
852	}
853
854	private static Dimensions getVideoDimensions(MediaMetadataRetriever metadataRetriever) throws NotAVideoFile {
855		String hasVideo = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_HAS_VIDEO);
856		if (hasVideo == null) {
857			throw new NotAVideoFile();
858		}
859		int rotation = extractRotationFromMediaRetriever(metadataRetriever);
860		boolean rotated = rotation == 90 || rotation == 270;
861		int height;
862		try {
863			String h = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
864			height = Integer.parseInt(h);
865		} catch (Exception e) {
866			height = -1;
867		}
868		int width;
869		try {
870			String w = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
871			width = Integer.parseInt(w);
872		} catch (Exception e) {
873			width = -1;
874		}
875		metadataRetriever.release();
876		Log.d(Config.LOGTAG,"extracted video dims "+width+"x"+height);
877		return rotated ? new Dimensions(width, height) : new Dimensions(height, width);
878	}
879
880	private static int extractRotationFromMediaRetriever(MediaMetadataRetriever metadataRetriever) {
881		int rotation;
882		if (Build.VERSION.SDK_INT >= 17) {
883			String r = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
884			try {
885				rotation = Integer.parseInt(r);
886			} catch (Exception e) {
887				rotation = 0;
888			}
889		} else {
890			rotation = 0;
891		}
892		return rotation;
893	}
894
895	private static class Dimensions {
896		public final int width;
897		public final int height;
898
899		public Dimensions(int height, int width) {
900			this.width = width;
901			this.height = height;
902		}
903
904		public int getMin() {
905			return Math.min(width,height);
906		}
907	}
908
909	private static class NotAVideoFile extends Exception {
910
911	}
912
913	public class FileCopyException extends Exception {
914		private static final long serialVersionUID = -1010013599132881427L;
915		private int resId;
916
917		public FileCopyException(int resId) {
918			this.resId = resId;
919		}
920
921		public int getResId() {
922			return resId;
923		}
924	}
925
926	public Bitmap getAvatar(String avatar, int size) {
927		if (avatar == null) {
928			return null;
929		}
930		Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
931		if (bm == null) {
932			return null;
933		}
934		return bm;
935	}
936
937	public boolean isFileAvailable(Message message) {
938		return getFile(message).exists();
939	}
940
941	public static void close(Closeable stream) {
942		if (stream != null) {
943			try {
944				stream.close();
945			} catch (IOException e) {
946			}
947		}
948	}
949
950	public static void close(Socket socket) {
951		if (socket != null) {
952			try {
953				socket.close();
954			} catch (IOException e) {
955			}
956		}
957	}
958
959
960	public static boolean weOwnFile(Context context, Uri uri) {
961		if (uri == null || !ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {
962			return false;
963		} else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
964			return fileIsInFilesDir(context, uri);
965		} else {
966			return weOwnFileLollipop(uri);
967		}
968	}
969
970
971	/**
972	 * This is more than hacky but probably way better than doing nothing
973	 * Further 'optimizations' might contain to get the parents of CacheDir and NoBackupDir
974	 * and check against those as well
975	 */
976	private static boolean fileIsInFilesDir(Context context, Uri uri) {
977		try {
978			final String haystack = context.getFilesDir().getParentFile().getCanonicalPath();
979			final String needle = new File(uri.getPath()).getCanonicalPath();
980			return needle.startsWith(haystack);
981		} catch (IOException e) {
982			return false;
983		}
984	}
985
986	@TargetApi(Build.VERSION_CODES.LOLLIPOP)
987	private static boolean weOwnFileLollipop(Uri uri) {
988		try {
989			File file = new File(uri.getPath());
990			FileDescriptor fd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY).getFileDescriptor();
991			StructStat st = Os.fstat(fd);
992			return st.st_uid == android.os.Process.myUid();
993		} catch (FileNotFoundException e) {
994			return false;
995		} catch (Exception e) {
996			return true;
997		}
998	}
999}