1package eu.siacs.conversations.persistance;
  2
  3import android.database.Cursor;
  4import android.graphics.Bitmap;
  5import android.graphics.BitmapFactory;
  6import android.graphics.Canvas;
  7import android.graphics.Matrix;
  8import android.graphics.RectF;
  9import android.net.Uri;
 10import android.os.Environment;
 11import android.provider.MediaStore;
 12import android.util.Base64;
 13import android.util.Base64OutputStream;
 14import android.util.Log;
 15import android.webkit.MimeTypeMap;
 16
 17import java.io.ByteArrayOutputStream;
 18import java.io.Closeable;
 19import java.io.File;
 20import java.io.FileNotFoundException;
 21import java.io.FileOutputStream;
 22import java.io.IOException;
 23import java.io.InputStream;
 24import java.io.OutputStream;
 25import java.net.URL;
 26import java.security.DigestOutputStream;
 27import java.security.MessageDigest;
 28import java.security.NoSuchAlgorithmException;
 29import java.text.SimpleDateFormat;
 30import java.util.Arrays;
 31import java.util.Date;
 32import java.util.Locale;
 33
 34import eu.siacs.conversations.Config;
 35import eu.siacs.conversations.R;
 36import eu.siacs.conversations.entities.DownloadableFile;
 37import eu.siacs.conversations.entities.Message;
 38import eu.siacs.conversations.entities.Transferable;
 39import eu.siacs.conversations.services.XmppConnectionService;
 40import eu.siacs.conversations.utils.CryptoHelper;
 41import eu.siacs.conversations.utils.ExifHelper;
 42import eu.siacs.conversations.utils.FileUtils;
 43import eu.siacs.conversations.xmpp.pep.Avatar;
 44
 45public class FileBackend {
 46
 47	private static int IMAGE_SIZE = 1920;
 48
 49	private final SimpleDateFormat imageDateFormat = new SimpleDateFormat("yyyyMMdd_HHmmssSSS", Locale.US);
 50
 51	private XmppConnectionService mXmppConnectionService;
 52
 53	public FileBackend(XmppConnectionService service) {
 54		this.mXmppConnectionService = service;
 55	}
 56
 57	public DownloadableFile getFile(Message message) {
 58		return getFile(message, true);
 59	}
 60
 61	public DownloadableFile getFile(Message message, boolean decrypted) {
 62		String path = message.getRelativeFilePath();
 63		String extension;
 64		if (path != null && !path.isEmpty()) {
 65			String[] parts = path.split("\\.");
 66			extension = "."+parts[parts.length - 1];
 67		} else {
 68			if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_TEXT) {
 69				extension = ".webp";
 70			} else {
 71				extension = "";
 72			}
 73			path = message.getUuid()+extension;
 74		}
 75		final boolean encrypted = !decrypted
 76				&& (message.getEncryption() == Message.ENCRYPTION_PGP
 77				|| message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
 78		if (encrypted) {
 79			return new DownloadableFile(getConversationsFileDirectory()+message.getUuid()+extension+".pgp");
 80		} else {
 81			if (path.startsWith("/")) {
 82				return new DownloadableFile(path);
 83			} else {
 84				if (Arrays.asList(Transferable.VALID_IMAGE_EXTENSIONS).contains(extension)) {
 85					return new DownloadableFile(getConversationsFileDirectory() + path);
 86				} else {
 87					return new DownloadableFile(getConversationsImageDirectory() + path);
 88				}
 89			}
 90		}
 91	}
 92
 93	public static String getConversationsFileDirectory() {
 94		return  Environment.getExternalStorageDirectory().getAbsolutePath()+"/Conversations/";
 95	}
 96
 97	public static String getConversationsImageDirectory() {
 98		return Environment.getExternalStoragePublicDirectory(
 99			Environment.DIRECTORY_PICTURES).getAbsolutePath()
100			+ "/Conversations/";
101	}
102
103	public Bitmap resize(Bitmap originalBitmap, int size) {
104		int w = originalBitmap.getWidth();
105		int h = originalBitmap.getHeight();
106		if (Math.max(w, h) > size) {
107			int scalledW;
108			int scalledH;
109			if (w <= h) {
110				scalledW = (int) (w / ((double) h / size));
111				scalledH = size;
112			} else {
113				scalledW = size;
114				scalledH = (int) (h / ((double) w / size));
115			}
116			return Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
117		} else {
118			return originalBitmap;
119		}
120	}
121
122	public Bitmap rotate(Bitmap bitmap, int degree) {
123		int w = bitmap.getWidth();
124		int h = bitmap.getHeight();
125		Matrix mtx = new Matrix();
126		mtx.postRotate(degree);
127		return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
128	}
129
130	public boolean useImageAsIs(Uri uri) {
131		String path = getOriginalPath(uri);
132		if (path == null) {
133			return false;
134		}
135		Log.d(Config.LOGTAG,"using image as is. path: "+path);
136		BitmapFactory.Options options = new BitmapFactory.Options();
137		options.inJustDecodeBounds = true;
138		try {
139			BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri), null, options);
140			return (options.outWidth <= Config.IMAGE_SIZE && options.outHeight <= Config.IMAGE_SIZE && options.outMimeType.contains(Config.IMAGE_FORMAT.name().toLowerCase()));
141		} catch (FileNotFoundException e) {
142			return false;
143		}
144	}
145
146	public String getOriginalPath(Uri uri) {
147		Log.d(Config.LOGTAG,"get original path for uri: "+uri.toString());
148		return FileUtils.getPath(mXmppConnectionService,uri);
149	}
150
151	public DownloadableFile copyFileToPrivateStorage(Message message, Uri uri) throws FileCopyException {
152		Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage");
153		String mime = mXmppConnectionService.getContentResolver().getType(uri);
154		String extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mime);
155		message.setRelativeFilePath(message.getUuid() + "." + extension);
156		DownloadableFile file = mXmppConnectionService.getFileBackend().getFile(message);
157		file.getParentFile().mkdirs();
158		OutputStream os = null;
159		InputStream is = null;
160		try {
161			file.createNewFile();
162			os = new FileOutputStream(file);
163			is = mXmppConnectionService.getContentResolver().openInputStream(uri);
164			byte[] buffer = new byte[1024];
165			int length;
166			while ((length = is.read(buffer)) > 0) {
167				os.write(buffer, 0, length);
168			}
169			os.flush();
170		} catch(FileNotFoundException e) {
171			throw new FileCopyException(R.string.error_file_not_found);
172		} catch (IOException e) {
173			e.printStackTrace();
174			throw new FileCopyException(R.string.error_io_exception);
175		} finally {
176			close(os);
177			close(is);
178		}
179		Log.d(Config.LOGTAG, "output file name " + mXmppConnectionService.getFileBackend().getFile(message));
180		return file;
181	}
182
183	public DownloadableFile copyImageToPrivateStorage(Message message, Uri image)
184			throws FileCopyException {
185		return this.copyImageToPrivateStorage(message, image, 0);
186	}
187
188	private DownloadableFile copyImageToPrivateStorage(Message message,Uri image, int sampleSize) throws FileCopyException {
189		switch(Config.IMAGE_FORMAT) {
190			case JPEG:
191				message.setRelativeFilePath(message.getUuid()+".jpg");
192				break;
193			case PNG:
194				message.setRelativeFilePath(message.getUuid()+".png");
195				break;
196			case WEBP:
197				message.setRelativeFilePath(message.getUuid()+".webp");
198				break;
199		}
200		DownloadableFile file = getFile(message);
201		file.getParentFile().mkdirs();
202		InputStream is = null;
203		OutputStream os = null;
204		try {
205			file.createNewFile();
206			is = mXmppConnectionService.getContentResolver().openInputStream(image);
207			os = new FileOutputStream(file);
208
209			Bitmap originalBitmap;
210			BitmapFactory.Options options = new BitmapFactory.Options();
211			int inSampleSize = (int) Math.pow(2, sampleSize);
212			Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
213			options.inSampleSize = inSampleSize;
214			originalBitmap = BitmapFactory.decodeStream(is, null, options);
215			is.close();
216			if (originalBitmap == null) {
217				throw new FileCopyException(R.string.error_not_an_image_file);
218			}
219			Bitmap scaledBitmap = resize(originalBitmap, Config.IMAGE_SIZE);
220			int rotation = getRotation(image);
221			if (rotation > 0) {
222				scaledBitmap = rotate(scaledBitmap, rotation);
223			}
224
225			boolean success = scaledBitmap.compress(Config.IMAGE_FORMAT, Config.IMAGE_QUALITY, os);
226			if (!success) {
227				throw new FileCopyException(R.string.error_compressing_image);
228			}
229			os.flush();
230			long size = file.getSize();
231			int width = scaledBitmap.getWidth();
232			int height = scaledBitmap.getHeight();
233			message.setBody(Long.toString(size) + '|' + width + '|' + height);
234			return file;
235		} catch (FileNotFoundException e) {
236			throw new FileCopyException(R.string.error_file_not_found);
237		} catch (IOException e) {
238			e.printStackTrace();
239			throw new FileCopyException(R.string.error_io_exception);
240		} catch (SecurityException e) {
241			throw new FileCopyException(R.string.error_security_exception_during_image_copy);
242		} catch (OutOfMemoryError e) {
243			++sampleSize;
244			if (sampleSize <= 3) {
245				return copyImageToPrivateStorage(message, image, sampleSize);
246			} else {
247				throw new FileCopyException(R.string.error_out_of_memory);
248			}
249		} catch (NullPointerException e) {
250			throw new FileCopyException(R.string.error_io_exception);
251		} finally {
252			close(os);
253			close(is);
254		}
255	}
256
257	private int getRotation(Uri image) {
258		InputStream is = null;
259		try {
260			is = mXmppConnectionService.getContentResolver().openInputStream(image);
261			return ExifHelper.getOrientation(is);
262		} catch (FileNotFoundException e) {
263			return 0;
264		} finally {
265			close(is);
266		}
267	}
268
269	public Bitmap getThumbnail(Message message, int size, boolean cacheOnly)
270			throws FileNotFoundException {
271		Bitmap thumbnail = mXmppConnectionService.getBitmapCache().get(
272				message.getUuid());
273		if ((thumbnail == null) && (!cacheOnly)) {
274			File file = getFile(message);
275			BitmapFactory.Options options = new BitmapFactory.Options();
276			options.inSampleSize = calcSampleSize(file, size);
277			Bitmap fullsize = BitmapFactory.decodeFile(file.getAbsolutePath(),options);
278			if (fullsize == null) {
279				throw new FileNotFoundException();
280			}
281			thumbnail = resize(fullsize, size);
282			this.mXmppConnectionService.getBitmapCache().put(message.getUuid(),
283					thumbnail);
284		}
285		return thumbnail;
286	}
287
288	public Uri getTakePhotoUri() {
289		StringBuilder pathBuilder = new StringBuilder();
290		pathBuilder.append(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM));
291		pathBuilder.append('/');
292		pathBuilder.append("Camera");
293		pathBuilder.append('/');
294		pathBuilder.append("IMG_" + this.imageDateFormat.format(new Date()) + ".jpg");
295		Uri uri = Uri.parse("file://" + pathBuilder.toString());
296		File file = new File(uri.toString());
297		file.getParentFile().mkdirs();
298		return uri;
299	}
300
301	public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
302		try {
303			Avatar avatar = new Avatar();
304			Bitmap bm = cropCenterSquare(image, size);
305			if (bm == null) {
306				return null;
307			}
308			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
309			Base64OutputStream mBase64OutputSttream = new Base64OutputStream(
310					mByteArrayOutputStream, Base64.DEFAULT);
311			MessageDigest digest = MessageDigest.getInstance("SHA-1");
312			DigestOutputStream mDigestOutputStream = new DigestOutputStream(
313					mBase64OutputSttream, digest);
314			if (!bm.compress(format, 75, mDigestOutputStream)) {
315				return null;
316			}
317			mDigestOutputStream.flush();
318			mDigestOutputStream.close();
319			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
320			avatar.image = new String(mByteArrayOutputStream.toByteArray());
321			return avatar;
322		} catch (NoSuchAlgorithmException e) {
323			return null;
324		} catch (IOException e) {
325			return null;
326		}
327	}
328
329	public boolean isAvatarCached(Avatar avatar) {
330		File file = new File(getAvatarPath(avatar.getFilename()));
331		return file.exists();
332	}
333
334	public boolean save(Avatar avatar) {
335		File file;
336		if (isAvatarCached(avatar)) {
337			file = new File(getAvatarPath(avatar.getFilename()));
338		} else {
339			String filename = getAvatarPath(avatar.getFilename());
340			file = new File(filename + ".tmp");
341			file.getParentFile().mkdirs();
342			OutputStream os = null;
343			try {
344				file.createNewFile();
345				os = new FileOutputStream(file);
346				MessageDigest digest = MessageDigest.getInstance("SHA-1");
347				digest.reset();
348				DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
349				mDigestOutputStream.write(avatar.getImageAsBytes());
350				mDigestOutputStream.flush();
351				mDigestOutputStream.close();
352				String sha1sum = CryptoHelper.bytesToHex(digest.digest());
353				if (sha1sum.equals(avatar.sha1sum)) {
354					file.renameTo(new File(filename));
355				} else {
356					Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
357					file.delete();
358					return false;
359				}
360			} catch (FileNotFoundException e) {
361				return false;
362			} catch (IOException e) {
363				return false;
364			} catch (NoSuchAlgorithmException e) {
365				return false;
366			} finally {
367				close(os);
368			}
369		}
370		avatar.size = file.length();
371		return true;
372	}
373
374	public String getAvatarPath(String avatar) {
375		return mXmppConnectionService.getFilesDir().getAbsolutePath()+ "/avatars/" + avatar;
376	}
377
378	public Uri getAvatarUri(String avatar) {
379		return Uri.parse("file:" + getAvatarPath(avatar));
380	}
381
382	public Bitmap cropCenterSquare(Uri image, int size) {
383		if (image == null) {
384			return null;
385		}
386		InputStream is = null;
387		try {
388			BitmapFactory.Options options = new BitmapFactory.Options();
389			options.inSampleSize = calcSampleSize(image, size);
390			is = mXmppConnectionService.getContentResolver().openInputStream(image);
391			Bitmap input = BitmapFactory.decodeStream(is, null, options);
392			if (input == null) {
393				return null;
394			} else {
395				int rotation = getRotation(image);
396				if (rotation > 0) {
397					input = rotate(input, rotation);
398				}
399				return cropCenterSquare(input, size);
400			}
401		} catch (FileNotFoundException e) {
402			return null;
403		} finally {
404			close(is);
405		}
406	}
407
408	public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
409		if (image == null) {
410			return null;
411		}
412		InputStream is = null;
413		try {
414			BitmapFactory.Options options = new BitmapFactory.Options();
415			options.inSampleSize = calcSampleSize(image,Math.max(newHeight, newWidth));
416			is = mXmppConnectionService.getContentResolver().openInputStream(image);
417			Bitmap source = BitmapFactory.decodeStream(is, null, options);
418			if (source == null) {
419				return null;
420			}
421			int sourceWidth = source.getWidth();
422			int sourceHeight = source.getHeight();
423			float xScale = (float) newWidth / sourceWidth;
424			float yScale = (float) newHeight / sourceHeight;
425			float scale = Math.max(xScale, yScale);
426			float scaledWidth = scale * sourceWidth;
427			float scaledHeight = scale * sourceHeight;
428			float left = (newWidth - scaledWidth) / 2;
429			float top = (newHeight - scaledHeight) / 2;
430
431			RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
432			Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
433			Canvas canvas = new Canvas(dest);
434			canvas.drawBitmap(source, null, targetRect, null);
435			return dest;
436		} catch (FileNotFoundException e) {
437			return null;
438		} finally {
439			close(is);
440		}
441	}
442
443	public Bitmap cropCenterSquare(Bitmap input, int size) {
444		int w = input.getWidth();
445		int h = input.getHeight();
446
447		float scale = Math.max((float) size / h, (float) size / w);
448
449		float outWidth = scale * w;
450		float outHeight = scale * h;
451		float left = (size - outWidth) / 2;
452		float top = (size - outHeight) / 2;
453		RectF target = new RectF(left, top, left + outWidth, top + outHeight);
454
455		Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
456		Canvas canvas = new Canvas(output);
457		canvas.drawBitmap(input, null, target, null);
458		return output;
459	}
460
461	private int calcSampleSize(Uri image, int size) throws FileNotFoundException {
462		BitmapFactory.Options options = new BitmapFactory.Options();
463		options.inJustDecodeBounds = true;
464		BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
465		return calcSampleSize(options, size);
466	}
467
468	private int calcSampleSize(File image, int size) {
469		BitmapFactory.Options options = new BitmapFactory.Options();
470		options.inJustDecodeBounds = true;
471		BitmapFactory.decodeFile(image.getAbsolutePath(), options);
472		return calcSampleSize(options, size);
473	}
474
475	private int calcSampleSize(BitmapFactory.Options options, int size) {
476		int height = options.outHeight;
477		int width = options.outWidth;
478		int inSampleSize = 1;
479
480		if (height > size || width > size) {
481			int halfHeight = height / 2;
482			int halfWidth = width / 2;
483
484			while ((halfHeight / inSampleSize) > size
485					&& (halfWidth / inSampleSize) > size) {
486				inSampleSize *= 2;
487			}
488		}
489		return inSampleSize;
490	}
491
492	public Uri getJingleFileUri(Message message) {
493		File file = getFile(message);
494		return Uri.parse("file://" + file.getAbsolutePath());
495	}
496
497	public void updateFileParams(Message message) {
498		updateFileParams(message,null);
499	}
500
501	public void updateFileParams(Message message, URL url) {
502		DownloadableFile file = getFile(message);
503		if (message.getType() == Message.TYPE_IMAGE || file.getMimeType().startsWith("image/")) {
504			BitmapFactory.Options options = new BitmapFactory.Options();
505			options.inJustDecodeBounds = true;
506			BitmapFactory.decodeFile(file.getAbsolutePath(), options);
507			int imageHeight = options.outHeight;
508			int imageWidth = options.outWidth;
509			if (url == null) {
510				message.setBody(Long.toString(file.getSize()) + '|' + imageWidth + '|' + imageHeight);
511			} else {
512				message.setBody(url.toString()+"|"+Long.toString(file.getSize()) + '|' + imageWidth + '|' + imageHeight);
513			}
514		} else {
515			if (url != null) {
516				message.setBody(url.toString()+"|"+Long.toString(file.getSize()));
517			} else {
518				message.setBody(Long.toString(file.getSize()));
519			}
520		}
521
522	}
523
524	public class FileCopyException extends Exception {
525		private static final long serialVersionUID = -1010013599132881427L;
526		private int resId;
527
528		public FileCopyException(int resId) {
529			this.resId = resId;
530		}
531
532		public int getResId() {
533			return resId;
534		}
535	}
536
537	public Bitmap getAvatar(String avatar, int size) {
538		if (avatar == null) {
539			return null;
540		}
541		Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
542		if (bm == null) {
543			return null;
544		}
545		return bm;
546	}
547
548	public boolean isFileAvailable(Message message) {
549		return getFile(message).exists();
550	}
551
552	public static void close(Closeable stream) {
553		if (stream != null) {
554			try {
555				stream.close();
556			} catch (IOException e) {
557			}
558		}
559	}
560}