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.Color;
  12import android.graphics.Matrix;
  13import android.graphics.Paint;
  14import android.graphics.RectF;
  15import android.media.MediaMetadataRetriever;
  16import android.net.Uri;
  17import android.os.Build;
  18import android.os.Environment;
  19import android.os.ParcelFileDescriptor;
  20import android.provider.MediaStore;
  21import android.provider.OpenableColumns;
  22import android.support.v4.content.FileProvider;
  23import android.system.Os;
  24import android.system.StructStat;
  25import android.util.Base64;
  26import android.util.Base64OutputStream;
  27import android.util.Log;
  28import android.util.LruCache;
  29import android.webkit.MimeTypeMap;
  30
  31import java.io.ByteArrayOutputStream;
  32import java.io.Closeable;
  33import java.io.File;
  34import java.io.FileDescriptor;
  35import java.io.FileInputStream;
  36import java.io.FileNotFoundException;
  37import java.io.FileOutputStream;
  38import java.io.IOException;
  39import java.io.InputStream;
  40import java.io.OutputStream;
  41import java.net.Socket;
  42import java.net.URL;
  43import java.security.DigestOutputStream;
  44import java.security.MessageDigest;
  45import java.security.NoSuchAlgorithmException;
  46import java.text.SimpleDateFormat;
  47import java.util.Arrays;
  48import java.util.Date;
  49import java.util.List;
  50import java.util.Locale;
  51import java.util.UUID;
  52
  53import eu.siacs.conversations.Config;
  54import eu.siacs.conversations.R;
  55import eu.siacs.conversations.entities.DownloadableFile;
  56import eu.siacs.conversations.entities.Message;
  57import eu.siacs.conversations.services.XmppConnectionService;
  58import eu.siacs.conversations.ui.RecordingActivity;
  59import eu.siacs.conversations.utils.CryptoHelper;
  60import eu.siacs.conversations.utils.ExifHelper;
  61import eu.siacs.conversations.utils.FileUtils;
  62import eu.siacs.conversations.utils.FileWriterException;
  63import eu.siacs.conversations.utils.MimeUtils;
  64import eu.siacs.conversations.xmpp.pep.Avatar;
  65
  66public class FileBackend {
  67
  68	private static final Object THUMBNAIL_LOCK = new Object();
  69
  70	private static final SimpleDateFormat IMAGE_DATE_FORMAT = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US);
  71
  72	private static final String FILE_PROVIDER = ".files";
  73
  74	private XmppConnectionService mXmppConnectionService;
  75
  76	public FileBackend(XmppConnectionService service) {
  77		this.mXmppConnectionService = service;
  78	}
  79
  80	private static boolean isInDirectoryThatShouldNotBeScanned(Context context, File file) {
  81		return isInDirectoryThatShouldNotBeScanned(context, file.getAbsolutePath());
  82	}
  83
  84	public static boolean isInDirectoryThatShouldNotBeScanned(Context context, String path) {
  85		for (String type : new String[]{RecordingActivity.STORAGE_DIRECTORY_TYPE_NAME, "Files"}) {
  86			if (path.startsWith(getConversationsDirectory(context, type))) {
  87				return true;
  88			}
  89		}
  90		return false;
  91	}
  92
  93	public static long getFileSize(Context context, Uri uri) {
  94		try {
  95			final Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
  96			if (cursor != null && cursor.moveToFirst()) {
  97				long size = cursor.getLong(cursor.getColumnIndex(OpenableColumns.SIZE));
  98				cursor.close();
  99				return size;
 100			} else {
 101				return -1;
 102			}
 103		} catch (Exception e) {
 104			return -1;
 105		}
 106	}
 107
 108	public static boolean allFilesUnderSize(Context context, List<Uri> uris, long max) {
 109		if (max <= 0) {
 110			Log.d(Config.LOGTAG, "server did not report max file size for http upload");
 111			return true; //exception to be compatible with HTTP Upload < v0.2
 112		}
 113		for (Uri uri : uris) {
 114			String mime = context.getContentResolver().getType(uri);
 115			if (mime != null && mime.startsWith("video/")) {
 116				try {
 117					Dimensions dimensions = FileBackend.getVideoDimensions(context, uri);
 118					if (dimensions.getMin() > 720) {
 119						Log.d(Config.LOGTAG, "do not consider video file with min width larger than 720 for size check");
 120						continue;
 121					}
 122				} catch (NotAVideoFile notAVideoFile) {
 123					//ignore and fall through
 124				}
 125			}
 126			if (FileBackend.getFileSize(context, uri) > max) {
 127				Log.d(Config.LOGTAG, "not all files are under " + max + " bytes. suggesting falling back to jingle");
 128				return false;
 129			}
 130		}
 131		return true;
 132	}
 133
 134	public static String getConversationsDirectory(Context context, final String type) {
 135		if (Config.ONLY_INTERNAL_STORAGE) {
 136			return context.getFilesDir().getAbsolutePath() + "/" + type + "/";
 137		} else {
 138			return getAppMediaDirectory(context) + context.getString(R.string.app_name) + " " + type + "/";
 139		}
 140	}
 141
 142	public static String getAppMediaDirectory(Context context) {
 143		return Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + context.getString(R.string.app_name) + "/Media/";
 144	}
 145
 146	public static String getConversationsLogsDirectory() {
 147		return Environment.getExternalStorageDirectory().getAbsolutePath() + "/Conversations/";
 148	}
 149
 150	private static Bitmap rotate(Bitmap bitmap, int degree) {
 151		if (degree == 0) {
 152			return bitmap;
 153		}
 154		int w = bitmap.getWidth();
 155		int h = bitmap.getHeight();
 156		Matrix mtx = new Matrix();
 157		mtx.postRotate(degree);
 158		Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
 159		if (bitmap != null && !bitmap.isRecycled()) {
 160			bitmap.recycle();
 161		}
 162		return result;
 163	}
 164
 165	public static boolean isPathBlacklisted(String path) {
 166		final String androidDataPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Android/data/";
 167		return path.startsWith(androidDataPath);
 168	}
 169
 170	private static Paint createAntiAliasingPaint() {
 171		Paint paint = new Paint();
 172		paint.setAntiAlias(true);
 173		paint.setFilterBitmap(true);
 174		paint.setDither(true);
 175		return paint;
 176	}
 177
 178	private static String getTakePhotoPath() {
 179		return Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) + "/Camera/";
 180	}
 181
 182	public static Uri getUriForFile(Context context, File file) {
 183		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N || Config.ONLY_INTERNAL_STORAGE) {
 184			try {
 185				return FileProvider.getUriForFile(context, getAuthority(context), file);
 186			} catch (IllegalArgumentException e) {
 187				if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 188					throw new SecurityException(e);
 189				} else {
 190					return Uri.fromFile(file);
 191				}
 192			}
 193		} else {
 194			return Uri.fromFile(file);
 195		}
 196	}
 197
 198	public static String getAuthority(Context context) {
 199		return context.getPackageName() + FILE_PROVIDER;
 200	}
 201
 202	private static boolean hasAlpha(final Bitmap bitmap) {
 203		for (int x = 0; x < bitmap.getWidth(); ++x) {
 204			for (int y = 0; y < bitmap.getWidth(); ++y) {
 205				if (Color.alpha(bitmap.getPixel(x, y)) < 255) {
 206					return true;
 207				}
 208			}
 209		}
 210		return false;
 211	}
 212
 213	private static int calcSampleSize(File image, int size) {
 214		BitmapFactory.Options options = new BitmapFactory.Options();
 215		options.inJustDecodeBounds = true;
 216		BitmapFactory.decodeFile(image.getAbsolutePath(), options);
 217		return calcSampleSize(options, size);
 218	}
 219
 220	private static int calcSampleSize(BitmapFactory.Options options, int size) {
 221		int height = options.outHeight;
 222		int width = options.outWidth;
 223		int inSampleSize = 1;
 224
 225		if (height > size || width > size) {
 226			int halfHeight = height / 2;
 227			int halfWidth = width / 2;
 228
 229			while ((halfHeight / inSampleSize) > size
 230					&& (halfWidth / inSampleSize) > size) {
 231				inSampleSize *= 2;
 232			}
 233		}
 234		return inSampleSize;
 235	}
 236
 237	private static Dimensions getVideoDimensions(Context context, Uri uri) throws NotAVideoFile {
 238		MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
 239		try {
 240			mediaMetadataRetriever.setDataSource(context, uri);
 241		} catch (RuntimeException e) {
 242			throw new NotAVideoFile(e);
 243		}
 244		return getVideoDimensions(mediaMetadataRetriever);
 245	}
 246
 247	private static Dimensions getVideoDimensionsOfFrame(MediaMetadataRetriever mediaMetadataRetriever) {
 248		Bitmap bitmap = null;
 249		try {
 250			bitmap = mediaMetadataRetriever.getFrameAtTime();
 251			return new Dimensions(bitmap.getHeight(), bitmap.getWidth());
 252		} catch (Exception e) {
 253			return null;
 254		} finally {
 255			if (bitmap != null) {
 256				bitmap.recycle();
 257				;
 258			}
 259		}
 260	}
 261
 262	private static Dimensions getVideoDimensions(MediaMetadataRetriever metadataRetriever) throws NotAVideoFile {
 263		String hasVideo = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_HAS_VIDEO);
 264		if (hasVideo == null) {
 265			throw new NotAVideoFile();
 266		}
 267		Dimensions dimensions = getVideoDimensionsOfFrame(metadataRetriever);
 268		if (dimensions != null) {
 269			return dimensions;
 270		}
 271		int rotation = extractRotationFromMediaRetriever(metadataRetriever);
 272		boolean rotated = rotation == 90 || rotation == 270;
 273		int height;
 274		try {
 275			String h = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
 276			height = Integer.parseInt(h);
 277		} catch (Exception e) {
 278			height = -1;
 279		}
 280		int width;
 281		try {
 282			String w = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
 283			width = Integer.parseInt(w);
 284		} catch (Exception e) {
 285			width = -1;
 286		}
 287		metadataRetriever.release();
 288		Log.d(Config.LOGTAG, "extracted video dims " + width + "x" + height);
 289		return rotated ? new Dimensions(width, height) : new Dimensions(height, width);
 290	}
 291
 292	private static int extractRotationFromMediaRetriever(MediaMetadataRetriever metadataRetriever) {
 293		String r = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
 294		try {
 295			return Integer.parseInt(r);
 296		} catch (Exception e) {
 297			return 0;
 298		}
 299	}
 300
 301	public static void close(Closeable stream) {
 302		if (stream != null) {
 303			try {
 304				stream.close();
 305			} catch (IOException e) {
 306			}
 307		}
 308	}
 309
 310	public static void close(Socket socket) {
 311		if (socket != null) {
 312			try {
 313				socket.close();
 314			} catch (IOException e) {
 315			}
 316		}
 317	}
 318
 319	public static boolean weOwnFile(Context context, Uri uri) {
 320		if (uri == null || !ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {
 321			return false;
 322		} else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
 323			return fileIsInFilesDir(context, uri);
 324		} else {
 325			return weOwnFileLollipop(uri);
 326		}
 327	}
 328
 329	/**
 330	 * This is more than hacky but probably way better than doing nothing
 331	 * Further 'optimizations' might contain to get the parents of CacheDir and NoBackupDir
 332	 * and check against those as well
 333	 */
 334	private static boolean fileIsInFilesDir(Context context, Uri uri) {
 335		try {
 336			final String haystack = context.getFilesDir().getParentFile().getCanonicalPath();
 337			final String needle = new File(uri.getPath()).getCanonicalPath();
 338			return needle.startsWith(haystack);
 339		} catch (IOException e) {
 340			return false;
 341		}
 342	}
 343
 344	@TargetApi(Build.VERSION_CODES.LOLLIPOP)
 345	private static boolean weOwnFileLollipop(Uri uri) {
 346		try {
 347			File file = new File(uri.getPath());
 348			FileDescriptor fd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY).getFileDescriptor();
 349			StructStat st = Os.fstat(fd);
 350			return st.st_uid == android.os.Process.myUid();
 351		} catch (FileNotFoundException e) {
 352			return false;
 353		} catch (Exception e) {
 354			return true;
 355		}
 356	}
 357
 358	private void createNoMedia(File diretory) {
 359		final File noMedia = new File(diretory, ".nomedia");
 360		if (!noMedia.exists()) {
 361			try {
 362				if (!noMedia.createNewFile()) {
 363					Log.d(Config.LOGTAG, "created nomedia file " + noMedia.getAbsolutePath());
 364				}
 365			} catch (Exception e) {
 366				Log.d(Config.LOGTAG, "could not create nomedia file");
 367			}
 368		}
 369	}
 370
 371	public void updateMediaScanner(File file) {
 372		if (!isInDirectoryThatShouldNotBeScanned(mXmppConnectionService, file)) {
 373			Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
 374			intent.setData(Uri.fromFile(file));
 375			mXmppConnectionService.sendBroadcast(intent);
 376		} else if (file.getAbsolutePath().startsWith(getAppMediaDirectory(mXmppConnectionService))) {
 377			createNoMedia(file.getParentFile());
 378		}
 379	}
 380
 381	public boolean deleteFile(Message message) {
 382		File file = getFile(message);
 383		if (file.delete()) {
 384			updateMediaScanner(file);
 385			return true;
 386		} else {
 387			return false;
 388		}
 389	}
 390
 391	public DownloadableFile getFile(Message message) {
 392		return getFile(message, true);
 393	}
 394
 395	public DownloadableFile getFileForPath(String path, String mime) {
 396		final DownloadableFile file;
 397		if (path.startsWith("/")) {
 398			file = new DownloadableFile(path);
 399		} else {
 400			if (mime != null && mime.startsWith("image/")) {
 401				file = new DownloadableFile(getConversationsDirectory("Images") + path);
 402			} else if (mime != null && mime.startsWith("video/")) {
 403				file = new DownloadableFile(getConversationsDirectory("Videos") + path);
 404			} else {
 405				file = new DownloadableFile(getConversationsDirectory("Files") + path);
 406			}
 407		}
 408		return file;
 409	}
 410
 411	public DownloadableFile getFile(Message message, boolean decrypted) {
 412		final boolean encrypted = !decrypted
 413				&& (message.getEncryption() == Message.ENCRYPTION_PGP
 414				|| message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
 415		String path = message.getRelativeFilePath();
 416		if (path == null) {
 417			path = message.getUuid();
 418		}
 419		final DownloadableFile file = getFileForPath(path, message.getMimeType());
 420		if (encrypted) {
 421			return new DownloadableFile(getConversationsDirectory("Files") + file.getName() + ".pgp");
 422		} else {
 423			return file;
 424		}
 425	}
 426
 427	public String getConversationsDirectory(final String type) {
 428		return getConversationsDirectory(mXmppConnectionService, type);
 429	}
 430
 431	private Bitmap resize(final Bitmap originalBitmap, int size) throws IOException {
 432		int w = originalBitmap.getWidth();
 433		int h = originalBitmap.getHeight();
 434		if (w <= 0 || h <= 0) {
 435			throw new IOException("Decoded bitmap reported bounds smaller 0");
 436		} else if (Math.max(w, h) > size) {
 437			int scalledW;
 438			int scalledH;
 439			if (w <= h) {
 440				scalledW = Math.max((int) (w / ((double) h / size)), 1);
 441				scalledH = size;
 442			} else {
 443				scalledW = size;
 444				scalledH = Math.max((int) (h / ((double) w / size)), 1);
 445			}
 446			final Bitmap result = Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
 447			if (!originalBitmap.isRecycled()) {
 448				originalBitmap.recycle();
 449			}
 450			return result;
 451		} else {
 452			return originalBitmap;
 453		}
 454	}
 455
 456	public boolean useImageAsIs(Uri uri) {
 457		String path = getOriginalPath(uri);
 458		if (path == null || isPathBlacklisted(path)) {
 459			return false;
 460		}
 461		File file = new File(path);
 462		long size = file.length();
 463		if (size == 0 || size >= mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize)) {
 464			return false;
 465		}
 466		BitmapFactory.Options options = new BitmapFactory.Options();
 467		options.inJustDecodeBounds = true;
 468		try {
 469			BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri), null, options);
 470			if (options.outMimeType == null || options.outHeight <= 0 || options.outWidth <= 0) {
 471				return false;
 472			}
 473			return (options.outWidth <= Config.IMAGE_SIZE && options.outHeight <= Config.IMAGE_SIZE && options.outMimeType.contains(Config.IMAGE_FORMAT.name().toLowerCase()));
 474		} catch (FileNotFoundException e) {
 475			return false;
 476		}
 477	}
 478
 479	public String getOriginalPath(Uri uri) {
 480		return FileUtils.getPath(mXmppConnectionService, uri);
 481	}
 482
 483	private void copyFileToPrivateStorage(File file, Uri uri) throws FileCopyException {
 484		Log.d(Config.LOGTAG, "copy file (" + uri.toString() + ") to private storage " + file.getAbsolutePath());
 485		file.getParentFile().mkdirs();
 486		OutputStream os = null;
 487		InputStream is = null;
 488		try {
 489			file.createNewFile();
 490			os = new FileOutputStream(file);
 491			is = mXmppConnectionService.getContentResolver().openInputStream(uri);
 492			byte[] buffer = new byte[1024];
 493			int length;
 494			while ((length = is.read(buffer)) > 0) {
 495				try {
 496					os.write(buffer, 0, length);
 497				} catch (IOException e) {
 498					throw new FileWriterException();
 499				}
 500			}
 501			try {
 502				os.flush();
 503			} catch (IOException e) {
 504				throw new FileWriterException();
 505			}
 506		} catch (FileNotFoundException e) {
 507			throw new FileCopyException(R.string.error_file_not_found);
 508		} catch (FileWriterException e) {
 509			throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
 510		} catch (IOException e) {
 511			e.printStackTrace();
 512			throw new FileCopyException(R.string.error_io_exception);
 513		} finally {
 514			close(os);
 515			close(is);
 516		}
 517	}
 518
 519	public void copyFileToPrivateStorage(Message message, Uri uri, String type) throws FileCopyException {
 520		String mime = type != null ? type : MimeUtils.guessMimeTypeFromUri(mXmppConnectionService, uri);
 521		Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage (mime=" + mime + ")");
 522		String extension = MimeUtils.guessExtensionFromMimeType(mime);
 523		if (extension == null) {
 524			Log.d(Config.LOGTAG, "extension from mime type was null");
 525			extension = getExtensionFromUri(uri);
 526		}
 527		if ("ogg".equals(extension) && type != null && type.startsWith("audio/")) {
 528			extension = "oga";
 529		}
 530		message.setRelativeFilePath(message.getUuid() + "." + extension);
 531		copyFileToPrivateStorage(mXmppConnectionService.getFileBackend().getFile(message), uri);
 532	}
 533
 534	private String getExtensionFromUri(Uri uri) {
 535		String[] projection = {MediaStore.MediaColumns.DATA};
 536		String filename = null;
 537		Cursor cursor = mXmppConnectionService.getContentResolver().query(uri, projection, null, null, null);
 538		if (cursor != null) {
 539			try {
 540				if (cursor.moveToFirst()) {
 541					filename = cursor.getString(0);
 542				}
 543			} catch (Exception e) {
 544				filename = null;
 545			} finally {
 546				cursor.close();
 547			}
 548		}
 549		if (filename == null) {
 550			final List<String> segments = uri.getPathSegments();
 551			if (segments.size() > 0) {
 552				filename = segments.get(segments.size() - 1);
 553			}
 554		}
 555		int pos = filename == null ? -1 : filename.lastIndexOf('.');
 556		return pos > 0 ? filename.substring(pos + 1) : null;
 557	}
 558
 559	private void copyImageToPrivateStorage(File file, Uri image, int sampleSize) throws FileCopyException {
 560		file.getParentFile().mkdirs();
 561		InputStream is = null;
 562		OutputStream os = null;
 563		try {
 564			if (!file.exists() && !file.createNewFile()) {
 565				throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
 566			}
 567			is = mXmppConnectionService.getContentResolver().openInputStream(image);
 568			if (is == null) {
 569				throw new FileCopyException(R.string.error_not_an_image_file);
 570			}
 571			Bitmap originalBitmap;
 572			BitmapFactory.Options options = new BitmapFactory.Options();
 573			int inSampleSize = (int) Math.pow(2, sampleSize);
 574			Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
 575			options.inSampleSize = inSampleSize;
 576			originalBitmap = BitmapFactory.decodeStream(is, null, options);
 577			is.close();
 578			if (originalBitmap == null) {
 579				throw new FileCopyException(R.string.error_not_an_image_file);
 580			}
 581			Bitmap scaledBitmap = resize(originalBitmap, Config.IMAGE_SIZE);
 582			int rotation = getRotation(image);
 583			scaledBitmap = rotate(scaledBitmap, rotation);
 584			boolean targetSizeReached = false;
 585			int quality = Config.IMAGE_QUALITY;
 586			final int imageMaxSize = mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize);
 587			while (!targetSizeReached) {
 588				os = new FileOutputStream(file);
 589				boolean success = scaledBitmap.compress(Config.IMAGE_FORMAT, quality, os);
 590				if (!success) {
 591					throw new FileCopyException(R.string.error_compressing_image);
 592				}
 593				os.flush();
 594				targetSizeReached = file.length() <= imageMaxSize || quality <= 50;
 595				quality -= 5;
 596			}
 597			scaledBitmap.recycle();
 598		} catch (FileNotFoundException e) {
 599			throw new FileCopyException(R.string.error_file_not_found);
 600		} catch (IOException e) {
 601			e.printStackTrace();
 602			throw new FileCopyException(R.string.error_io_exception);
 603		} catch (SecurityException e) {
 604			throw new FileCopyException(R.string.error_security_exception_during_image_copy);
 605		} catch (OutOfMemoryError e) {
 606			++sampleSize;
 607			if (sampleSize <= 3) {
 608				copyImageToPrivateStorage(file, image, sampleSize);
 609			} else {
 610				throw new FileCopyException(R.string.error_out_of_memory);
 611			}
 612		} finally {
 613			close(os);
 614			close(is);
 615		}
 616	}
 617
 618	public void copyImageToPrivateStorage(File file, Uri image) throws FileCopyException {
 619		Log.d(Config.LOGTAG, "copy image (" + image.toString() + ") to private storage " + file.getAbsolutePath());
 620		copyImageToPrivateStorage(file, image, 0);
 621	}
 622
 623	public void copyImageToPrivateStorage(Message message, Uri image) throws FileCopyException {
 624		switch (Config.IMAGE_FORMAT) {
 625			case JPEG:
 626				message.setRelativeFilePath(message.getUuid() + ".jpg");
 627				break;
 628			case PNG:
 629				message.setRelativeFilePath(message.getUuid() + ".png");
 630				break;
 631			case WEBP:
 632				message.setRelativeFilePath(message.getUuid() + ".webp");
 633				break;
 634		}
 635		copyImageToPrivateStorage(getFile(message), image);
 636		updateFileParams(message);
 637	}
 638
 639	private int getRotation(File file) {
 640		return getRotation(Uri.parse("file://" + file.getAbsolutePath()));
 641	}
 642
 643	private int getRotation(Uri image) {
 644		InputStream is = null;
 645		try {
 646			is = mXmppConnectionService.getContentResolver().openInputStream(image);
 647			return ExifHelper.getOrientation(is);
 648		} catch (FileNotFoundException e) {
 649			return 0;
 650		} finally {
 651			close(is);
 652		}
 653	}
 654
 655	public Bitmap getThumbnail(Message message, int size, boolean cacheOnly) throws IOException {
 656		final String uuid = message.getUuid();
 657		final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
 658		Bitmap thumbnail = cache.get(uuid);
 659		if ((thumbnail == null) && (!cacheOnly)) {
 660			synchronized (THUMBNAIL_LOCK) {
 661				thumbnail = cache.get(uuid);
 662				if (thumbnail != null) {
 663					return thumbnail;
 664				}
 665				DownloadableFile file = getFile(message);
 666				final String mime = file.getMimeType();
 667				if (mime.startsWith("video/")) {
 668					thumbnail = getVideoPreview(file, size);
 669				} else {
 670					Bitmap fullsize = getFullsizeImagePreview(file, size);
 671					if (fullsize == null) {
 672						throw new FileNotFoundException();
 673					}
 674					thumbnail = resize(fullsize, size);
 675					thumbnail = rotate(thumbnail, getRotation(file));
 676					if (mime.equals("image/gif")) {
 677						Bitmap withGifOverlay = thumbnail.copy(Bitmap.Config.ARGB_8888, true);
 678						drawOverlay(withGifOverlay, R.drawable.play_gif, 1.0f);
 679						thumbnail.recycle();
 680						thumbnail = withGifOverlay;
 681					}
 682				}
 683				this.mXmppConnectionService.getBitmapCache().put(uuid, thumbnail);
 684			}
 685		}
 686		return thumbnail;
 687	}
 688
 689	private Bitmap getFullsizeImagePreview(File file, int size) {
 690		BitmapFactory.Options options = new BitmapFactory.Options();
 691		options.inSampleSize = calcSampleSize(file, size);
 692		try {
 693			return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 694		} catch (OutOfMemoryError e) {
 695			options.inSampleSize *= 2;
 696			return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 697		}
 698	}
 699
 700	private void drawOverlay(Bitmap bitmap, int resource, float factor) {
 701		Bitmap overlay = BitmapFactory.decodeResource(mXmppConnectionService.getResources(), resource);
 702		Canvas canvas = new Canvas(bitmap);
 703		float targetSize = Math.min(canvas.getWidth(), canvas.getHeight()) * factor;
 704		Log.d(Config.LOGTAG, "target size overlay: " + targetSize + " overlay bitmap size was " + overlay.getHeight());
 705		float left = (canvas.getWidth() - targetSize) / 2.0f;
 706		float top = (canvas.getHeight() - targetSize) / 2.0f;
 707		RectF dst = new RectF(left, top, left + targetSize - 1, top + targetSize - 1);
 708		canvas.drawBitmap(overlay, null, dst, createAntiAliasingPaint());
 709	}
 710
 711	private Bitmap getVideoPreview(File file, int size) {
 712		MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
 713		Bitmap frame;
 714		try {
 715			metadataRetriever.setDataSource(file.getAbsolutePath());
 716			frame = metadataRetriever.getFrameAtTime(0);
 717			metadataRetriever.release();
 718			frame = resize(frame, size);
 719		} catch (IOException | RuntimeException e) {
 720			frame = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 721			frame.eraseColor(0xff000000);
 722		}
 723		drawOverlay(frame, R.drawable.play_video, 0.75f);
 724		return frame;
 725	}
 726
 727	public Uri getTakePhotoUri() {
 728		File file;
 729		if (Config.ONLY_INTERNAL_STORAGE) {
 730			file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath(), "Camera/IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
 731		} else {
 732			file = new File(getTakePhotoPath() + "IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
 733		}
 734		file.getParentFile().mkdirs();
 735		return getUriForFile(mXmppConnectionService, file);
 736	}
 737
 738	public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
 739		Bitmap bm = cropCenterSquare(image, size);
 740		if (bm == null) {
 741			return null;
 742		}
 743		if (hasAlpha(bm)) {
 744			Log.d(Config.LOGTAG, "alpha in avatar detected; uploading as PNG");
 745			bm.recycle();
 746			bm = cropCenterSquare(image, 96);
 747			return getPepAvatar(bm, Bitmap.CompressFormat.PNG, 100);
 748		}
 749		return getPepAvatar(bm, format, 100);
 750	}
 751
 752	private Avatar getPepAvatar(Bitmap bitmap, Bitmap.CompressFormat format, int quality) {
 753		try {
 754			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
 755			Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
 756			MessageDigest digest = MessageDigest.getInstance("SHA-1");
 757			DigestOutputStream mDigestOutputStream = new DigestOutputStream(mBase64OutputStream, digest);
 758			if (!bitmap.compress(format, quality, mDigestOutputStream)) {
 759				return null;
 760			}
 761			mDigestOutputStream.flush();
 762			mDigestOutputStream.close();
 763			long chars = mByteArrayOutputStream.size();
 764			if (format != Bitmap.CompressFormat.PNG && quality >= 50 && chars >= Config.AVATAR_CHAR_LIMIT) {
 765				int q = quality - 2;
 766				Log.d(Config.LOGTAG, "avatar char length was " + chars + " reducing quality to " + q);
 767				return getPepAvatar(bitmap, format, q);
 768			}
 769			Log.d(Config.LOGTAG, "settled on char length " + chars + " with quality=" + quality);
 770			final Avatar avatar = new Avatar();
 771			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
 772			avatar.image = new String(mByteArrayOutputStream.toByteArray());
 773			if (format.equals(Bitmap.CompressFormat.WEBP)) {
 774				avatar.type = "image/webp";
 775			} else if (format.equals(Bitmap.CompressFormat.JPEG)) {
 776				avatar.type = "image/jpeg";
 777			} else if (format.equals(Bitmap.CompressFormat.PNG)) {
 778				avatar.type = "image/png";
 779			}
 780			avatar.width = bitmap.getWidth();
 781			avatar.height = bitmap.getHeight();
 782			return avatar;
 783		} catch (Exception e) {
 784			return null;
 785		}
 786	}
 787
 788	public Avatar getStoredPepAvatar(String hash) {
 789		if (hash == null) {
 790			return null;
 791		}
 792		Avatar avatar = new Avatar();
 793		File file = new File(getAvatarPath(hash));
 794		FileInputStream is = null;
 795		try {
 796			avatar.size = file.length();
 797			BitmapFactory.Options options = new BitmapFactory.Options();
 798			options.inJustDecodeBounds = true;
 799			BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 800			is = new FileInputStream(file);
 801			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
 802			Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
 803			MessageDigest digest = MessageDigest.getInstance("SHA-1");
 804			DigestOutputStream os = new DigestOutputStream(mBase64OutputStream, digest);
 805			byte[] buffer = new byte[4096];
 806			int length;
 807			while ((length = is.read(buffer)) > 0) {
 808				os.write(buffer, 0, length);
 809			}
 810			os.flush();
 811			os.close();
 812			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
 813			avatar.image = new String(mByteArrayOutputStream.toByteArray());
 814			avatar.height = options.outHeight;
 815			avatar.width = options.outWidth;
 816			avatar.type = options.outMimeType;
 817			return avatar;
 818		} catch (NoSuchAlgorithmException | IOException e) {
 819			return null;
 820		} finally {
 821			close(is);
 822		}
 823	}
 824
 825	public boolean isAvatarCached(Avatar avatar) {
 826		File file = new File(getAvatarPath(avatar.getFilename()));
 827		return file.exists();
 828	}
 829
 830	public boolean save(final Avatar avatar) {
 831		File file;
 832		if (isAvatarCached(avatar)) {
 833			file = new File(getAvatarPath(avatar.getFilename()));
 834			avatar.size = file.length();
 835		} else {
 836			file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath() + "/" + UUID.randomUUID().toString());
 837			if (file.getParentFile().mkdirs()) {
 838				Log.d(Config.LOGTAG, "created cache directory");
 839			}
 840			OutputStream os = null;
 841			try {
 842				if (!file.createNewFile()) {
 843					Log.d(Config.LOGTAG, "unable to create temporary file " + file.getAbsolutePath());
 844				}
 845				os = new FileOutputStream(file);
 846				MessageDigest digest = MessageDigest.getInstance("SHA-1");
 847				digest.reset();
 848				DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
 849				final byte[] bytes = avatar.getImageAsBytes();
 850				mDigestOutputStream.write(bytes);
 851				mDigestOutputStream.flush();
 852				mDigestOutputStream.close();
 853				String sha1sum = CryptoHelper.bytesToHex(digest.digest());
 854				if (sha1sum.equals(avatar.sha1sum)) {
 855					File outputFile = new File(getAvatarPath(avatar.getFilename()));
 856					if (outputFile.getParentFile().mkdirs()) {
 857						Log.d(Config.LOGTAG, "created avatar directory");
 858					}
 859					String filename = getAvatarPath(avatar.getFilename());
 860					if (!file.renameTo(new File(filename))) {
 861						Log.d(Config.LOGTAG, "unable to rename " + file.getAbsolutePath() + " to " + outputFile);
 862						return false;
 863					}
 864				} else {
 865					Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
 866					if (!file.delete()) {
 867						Log.d(Config.LOGTAG, "unable to delete temporary file");
 868					}
 869					return false;
 870				}
 871				avatar.size = bytes.length;
 872			} catch (IllegalArgumentException | IOException | NoSuchAlgorithmException e) {
 873				return false;
 874			} finally {
 875				close(os);
 876			}
 877		}
 878		return true;
 879	}
 880
 881	private String getAvatarPath(String avatar) {
 882		return mXmppConnectionService.getFilesDir().getAbsolutePath() + "/avatars/" + avatar;
 883	}
 884
 885	public Uri getAvatarUri(String avatar) {
 886		return Uri.parse("file:" + getAvatarPath(avatar));
 887	}
 888
 889	public Bitmap cropCenterSquare(Uri image, int size) {
 890		if (image == null) {
 891			return null;
 892		}
 893		InputStream is = null;
 894		try {
 895			BitmapFactory.Options options = new BitmapFactory.Options();
 896			options.inSampleSize = calcSampleSize(image, size);
 897			is = mXmppConnectionService.getContentResolver().openInputStream(image);
 898			if (is == null) {
 899				return null;
 900			}
 901			Bitmap input = BitmapFactory.decodeStream(is, null, options);
 902			if (input == null) {
 903				return null;
 904			} else {
 905				input = rotate(input, getRotation(image));
 906				return cropCenterSquare(input, size);
 907			}
 908		} catch (FileNotFoundException | SecurityException e) {
 909			return null;
 910		} finally {
 911			close(is);
 912		}
 913	}
 914
 915	public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
 916		if (image == null) {
 917			return null;
 918		}
 919		InputStream is = null;
 920		try {
 921			BitmapFactory.Options options = new BitmapFactory.Options();
 922			options.inSampleSize = calcSampleSize(image, Math.max(newHeight, newWidth));
 923			is = mXmppConnectionService.getContentResolver().openInputStream(image);
 924			if (is == null) {
 925				return null;
 926			}
 927			Bitmap source = BitmapFactory.decodeStream(is, null, options);
 928			if (source == null) {
 929				return null;
 930			}
 931			int sourceWidth = source.getWidth();
 932			int sourceHeight = source.getHeight();
 933			float xScale = (float) newWidth / sourceWidth;
 934			float yScale = (float) newHeight / sourceHeight;
 935			float scale = Math.max(xScale, yScale);
 936			float scaledWidth = scale * sourceWidth;
 937			float scaledHeight = scale * sourceHeight;
 938			float left = (newWidth - scaledWidth) / 2;
 939			float top = (newHeight - scaledHeight) / 2;
 940
 941			RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
 942			Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
 943			Canvas canvas = new Canvas(dest);
 944			canvas.drawBitmap(source, null, targetRect, createAntiAliasingPaint());
 945			if (source.isRecycled()) {
 946				source.recycle();
 947			}
 948			return dest;
 949		} catch (SecurityException e) {
 950			return null; //android 6.0 with revoked permissions for example
 951		} catch (FileNotFoundException e) {
 952			return null;
 953		} finally {
 954			close(is);
 955		}
 956	}
 957
 958	public Bitmap cropCenterSquare(Bitmap input, int size) {
 959		int w = input.getWidth();
 960		int h = input.getHeight();
 961
 962		float scale = Math.max((float) size / h, (float) size / w);
 963
 964		float outWidth = scale * w;
 965		float outHeight = scale * h;
 966		float left = (size - outWidth) / 2;
 967		float top = (size - outHeight) / 2;
 968		RectF target = new RectF(left, top, left + outWidth, top + outHeight);
 969
 970		Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 971		Canvas canvas = new Canvas(output);
 972		canvas.drawBitmap(input, null, target, createAntiAliasingPaint());
 973		if (!input.isRecycled()) {
 974			input.recycle();
 975		}
 976		return output;
 977	}
 978
 979	private int calcSampleSize(Uri image, int size) throws FileNotFoundException, SecurityException {
 980		BitmapFactory.Options options = new BitmapFactory.Options();
 981		options.inJustDecodeBounds = true;
 982		BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
 983		return calcSampleSize(options, size);
 984	}
 985
 986	public void updateFileParams(Message message) {
 987		updateFileParams(message, null);
 988	}
 989
 990	public void updateFileParams(Message message, URL url) {
 991		DownloadableFile file = getFile(message);
 992		final String mime = file.getMimeType();
 993		boolean image = message.getType() == Message.TYPE_IMAGE || (mime != null && mime.startsWith("image/"));
 994		boolean video = mime != null && mime.startsWith("video/");
 995		boolean audio = mime != null && mime.startsWith("audio/");
 996		final StringBuilder body = new StringBuilder();
 997		if (url != null) {
 998			body.append(url.toString());
 999		}
1000		body.append('|').append(file.getSize());
1001		if (image || video) {
1002			try {
1003				Dimensions dimensions = image ? getImageDimensions(file) : getVideoDimensions(file);
1004				if (dimensions.valid()) {
1005					body.append('|').append(dimensions.width).append('|').append(dimensions.height);
1006				}
1007			} catch (NotAVideoFile notAVideoFile) {
1008				Log.d(Config.LOGTAG, "file with mime type " + file.getMimeType() + " was not a video file");
1009				//fall threw
1010			}
1011		} else if (audio) {
1012			body.append("|0|0|").append(getMediaRuntime(file));
1013		}
1014		message.setBody(body.toString());
1015	}
1016
1017	public int getMediaRuntime(Uri uri) {
1018		try {
1019			MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
1020			mediaMetadataRetriever.setDataSource(mXmppConnectionService, uri);
1021			return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
1022		} catch (RuntimeException e) {
1023			return 0;
1024		}
1025	}
1026
1027	private int getMediaRuntime(File file) {
1028		try {
1029			MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
1030			mediaMetadataRetriever.setDataSource(file.toString());
1031			return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
1032		} catch (RuntimeException e) {
1033			return 0;
1034		}
1035	}
1036
1037	private Dimensions getImageDimensions(File file) {
1038		BitmapFactory.Options options = new BitmapFactory.Options();
1039		options.inJustDecodeBounds = true;
1040		BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1041		int rotation = getRotation(file);
1042		boolean rotated = rotation == 90 || rotation == 270;
1043		int imageHeight = rotated ? options.outWidth : options.outHeight;
1044		int imageWidth = rotated ? options.outHeight : options.outWidth;
1045		return new Dimensions(imageHeight, imageWidth);
1046	}
1047
1048	private Dimensions getVideoDimensions(File file) throws NotAVideoFile {
1049		MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
1050		try {
1051			metadataRetriever.setDataSource(file.getAbsolutePath());
1052		} catch (RuntimeException e) {
1053			throw new NotAVideoFile(e);
1054		}
1055		return getVideoDimensions(metadataRetriever);
1056	}
1057
1058	public Bitmap getAvatar(String avatar, int size) {
1059		if (avatar == null) {
1060			return null;
1061		}
1062		Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
1063		if (bm == null) {
1064			return null;
1065		}
1066		return bm;
1067	}
1068
1069	public boolean isFileAvailable(Message message) {
1070		return getFile(message).exists();
1071	}
1072
1073	private static class Dimensions {
1074		public final int width;
1075		public final int height;
1076
1077		Dimensions(int height, int width) {
1078			this.width = width;
1079			this.height = height;
1080		}
1081
1082		public int getMin() {
1083			return Math.min(width, height);
1084		}
1085
1086		public boolean valid() {
1087			return width > 0 && height > 0;
1088		}
1089	}
1090
1091	private static class NotAVideoFile extends Exception {
1092		public NotAVideoFile(Throwable t) {
1093			super(t);
1094		}
1095
1096		public NotAVideoFile() {
1097			super();
1098		}
1099	}
1100
1101	public class FileCopyException extends Exception {
1102		private static final long serialVersionUID = -1010013599132881427L;
1103		private int resId;
1104
1105		public FileCopyException(int resId) {
1106			this.resId = resId;
1107		}
1108
1109		public int getResId() {
1110			return resId;
1111		}
1112	}
1113}