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	public static Uri getIndexableTakePhotoUri(Uri original) {
 203		if (Config.ONLY_INTERNAL_STORAGE || "file".equals(original.getScheme())) {
 204			return original;
 205		} else {
 206			List<String> segments = original.getPathSegments();
 207			return Uri.parse("file://" + getTakePhotoPath() + segments.get(segments.size() - 1));
 208		}
 209	}
 210
 211	private static boolean hasAlpha(final Bitmap bitmap) {
 212		for (int x = 0; x < bitmap.getWidth(); ++x) {
 213			for (int y = 0; y < bitmap.getWidth(); ++y) {
 214				if (Color.alpha(bitmap.getPixel(x, y)) < 255) {
 215					return true;
 216				}
 217			}
 218		}
 219		return false;
 220	}
 221
 222	private static int calcSampleSize(File image, int size) {
 223		BitmapFactory.Options options = new BitmapFactory.Options();
 224		options.inJustDecodeBounds = true;
 225		BitmapFactory.decodeFile(image.getAbsolutePath(), options);
 226		return calcSampleSize(options, size);
 227	}
 228
 229	public static int calcSampleSize(BitmapFactory.Options options, int size) {
 230		int height = options.outHeight;
 231		int width = options.outWidth;
 232		int inSampleSize = 1;
 233
 234		if (height > size || width > size) {
 235			int halfHeight = height / 2;
 236			int halfWidth = width / 2;
 237
 238			while ((halfHeight / inSampleSize) > size
 239					&& (halfWidth / inSampleSize) > size) {
 240				inSampleSize *= 2;
 241			}
 242		}
 243		return inSampleSize;
 244	}
 245
 246	private static Dimensions getVideoDimensions(Context context, Uri uri) throws NotAVideoFile {
 247		MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
 248		try {
 249			mediaMetadataRetriever.setDataSource(context, uri);
 250		} catch (RuntimeException e) {
 251			throw new NotAVideoFile(e);
 252		}
 253		return getVideoDimensions(mediaMetadataRetriever);
 254	}
 255
 256	private static Dimensions getVideoDimensionsOfFrame(MediaMetadataRetriever mediaMetadataRetriever) {
 257		Bitmap bitmap = null;
 258		try {
 259			bitmap = mediaMetadataRetriever.getFrameAtTime();
 260			return new Dimensions(bitmap.getHeight(), bitmap.getWidth());
 261		} catch (Exception e) {
 262			return null;
 263		} finally {
 264			if (bitmap != null) {
 265				bitmap.recycle();
 266				;
 267			}
 268		}
 269	}
 270
 271	private static Dimensions getVideoDimensions(MediaMetadataRetriever metadataRetriever) throws NotAVideoFile {
 272		String hasVideo = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_HAS_VIDEO);
 273		if (hasVideo == null) {
 274			throw new NotAVideoFile();
 275		}
 276		Dimensions dimensions = getVideoDimensionsOfFrame(metadataRetriever);
 277		if (dimensions != null) {
 278			return dimensions;
 279		}
 280		int rotation = extractRotationFromMediaRetriever(metadataRetriever);
 281		boolean rotated = rotation == 90 || rotation == 270;
 282		int height;
 283		try {
 284			String h = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
 285			height = Integer.parseInt(h);
 286		} catch (Exception e) {
 287			height = -1;
 288		}
 289		int width;
 290		try {
 291			String w = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
 292			width = Integer.parseInt(w);
 293		} catch (Exception e) {
 294			width = -1;
 295		}
 296		metadataRetriever.release();
 297		Log.d(Config.LOGTAG, "extracted video dims " + width + "x" + height);
 298		return rotated ? new Dimensions(width, height) : new Dimensions(height, width);
 299	}
 300
 301	private static int extractRotationFromMediaRetriever(MediaMetadataRetriever metadataRetriever) {
 302		String r = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
 303		try {
 304			return Integer.parseInt(r);
 305		} catch (Exception e) {
 306			return 0;
 307		}
 308	}
 309
 310	public static void close(Closeable stream) {
 311		if (stream != null) {
 312			try {
 313				stream.close();
 314			} catch (IOException e) {
 315			}
 316		}
 317	}
 318
 319	public static void close(Socket socket) {
 320		if (socket != null) {
 321			try {
 322				socket.close();
 323			} catch (IOException e) {
 324			}
 325		}
 326	}
 327
 328	public static boolean weOwnFile(Context context, Uri uri) {
 329		if (uri == null || !ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {
 330			return false;
 331		} else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
 332			return fileIsInFilesDir(context, uri);
 333		} else {
 334			return weOwnFileLollipop(uri);
 335		}
 336	}
 337
 338	/**
 339	 * This is more than hacky but probably way better than doing nothing
 340	 * Further 'optimizations' might contain to get the parents of CacheDir and NoBackupDir
 341	 * and check against those as well
 342	 */
 343	private static boolean fileIsInFilesDir(Context context, Uri uri) {
 344		try {
 345			final String haystack = context.getFilesDir().getParentFile().getCanonicalPath();
 346			final String needle = new File(uri.getPath()).getCanonicalPath();
 347			return needle.startsWith(haystack);
 348		} catch (IOException e) {
 349			return false;
 350		}
 351	}
 352
 353	@TargetApi(Build.VERSION_CODES.LOLLIPOP)
 354	private static boolean weOwnFileLollipop(Uri uri) {
 355		try {
 356			File file = new File(uri.getPath());
 357			FileDescriptor fd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY).getFileDescriptor();
 358			StructStat st = Os.fstat(fd);
 359			return st.st_uid == android.os.Process.myUid();
 360		} catch (FileNotFoundException e) {
 361			return false;
 362		} catch (Exception e) {
 363			return true;
 364		}
 365	}
 366
 367	private void createNoMedia(File diretory) {
 368		final File noMedia = new File(diretory, ".nomedia");
 369		if (!noMedia.exists()) {
 370			try {
 371				if (!noMedia.createNewFile()) {
 372					Log.d(Config.LOGTAG, "created nomedia file " + noMedia.getAbsolutePath());
 373				}
 374			} catch (Exception e) {
 375				Log.d(Config.LOGTAG, "could not create nomedia file");
 376			}
 377		}
 378	}
 379
 380	public void updateMediaScanner(File file) {
 381		if (!isInDirectoryThatShouldNotBeScanned(mXmppConnectionService, file)) {
 382			Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
 383			intent.setData(Uri.fromFile(file));
 384			mXmppConnectionService.sendBroadcast(intent);
 385		} else if (file.getAbsolutePath().startsWith(getAppMediaDirectory(mXmppConnectionService))) {
 386			createNoMedia(file.getParentFile());
 387		}
 388	}
 389
 390	public boolean deleteFile(Message message) {
 391		File file = getFile(message);
 392		if (file.delete()) {
 393			updateMediaScanner(file);
 394			return true;
 395		} else {
 396			return false;
 397		}
 398	}
 399
 400	public DownloadableFile getFile(Message message) {
 401		return getFile(message, true);
 402	}
 403
 404	public DownloadableFile getFileForPath(String path, String mime) {
 405		final DownloadableFile file;
 406		if (path.startsWith("/")) {
 407			file = new DownloadableFile(path);
 408		} else {
 409			if (mime != null && mime.startsWith("image/")) {
 410				file = new DownloadableFile(getConversationsDirectory("Images") + path);
 411			} else if (mime != null && mime.startsWith("video/")) {
 412				file = new DownloadableFile(getConversationsDirectory("Videos") + path);
 413			} else {
 414				file = new DownloadableFile(getConversationsDirectory("Files") + path);
 415			}
 416		}
 417		return file;
 418	}
 419
 420	public DownloadableFile getFile(Message message, boolean decrypted) {
 421		final boolean encrypted = !decrypted
 422				&& (message.getEncryption() == Message.ENCRYPTION_PGP
 423				|| message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
 424		String path = message.getRelativeFilePath();
 425		if (path == null) {
 426			path = message.getUuid();
 427		}
 428		final DownloadableFile file = getFileForPath(path, message.getMimeType());
 429		if (encrypted) {
 430			return new DownloadableFile(getConversationsDirectory("Files") + file.getName() + ".pgp");
 431		} else {
 432			return file;
 433		}
 434	}
 435
 436	public String getConversationsDirectory(final String type) {
 437		return getConversationsDirectory(mXmppConnectionService, type);
 438	}
 439
 440	private Bitmap resize(final Bitmap originalBitmap, int size) throws IOException {
 441		int w = originalBitmap.getWidth();
 442		int h = originalBitmap.getHeight();
 443		if (w <= 0 || h <= 0) {
 444			throw new IOException("Decoded bitmap reported bounds smaller 0");
 445		} else if (Math.max(w, h) > size) {
 446			int scalledW;
 447			int scalledH;
 448			if (w <= h) {
 449				scalledW = Math.max((int) (w / ((double) h / size)), 1);
 450				scalledH = size;
 451			} else {
 452				scalledW = size;
 453				scalledH = Math.max((int) (h / ((double) w / size)), 1);
 454			}
 455			final Bitmap result = Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
 456			if (!originalBitmap.isRecycled()) {
 457				originalBitmap.recycle();
 458			}
 459			return result;
 460		} else {
 461			return originalBitmap;
 462		}
 463	}
 464
 465	public boolean useImageAsIs(Uri uri) {
 466		String path = getOriginalPath(uri);
 467		if (path == null || isPathBlacklisted(path)) {
 468			return false;
 469		}
 470		File file = new File(path);
 471		long size = file.length();
 472		if (size == 0 || size >= mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize)) {
 473			return false;
 474		}
 475		BitmapFactory.Options options = new BitmapFactory.Options();
 476		options.inJustDecodeBounds = true;
 477		try {
 478			BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri), null, options);
 479			if (options.outMimeType == null || options.outHeight <= 0 || options.outWidth <= 0) {
 480				return false;
 481			}
 482			return (options.outWidth <= Config.IMAGE_SIZE && options.outHeight <= Config.IMAGE_SIZE && options.outMimeType.contains(Config.IMAGE_FORMAT.name().toLowerCase()));
 483		} catch (FileNotFoundException e) {
 484			return false;
 485		}
 486	}
 487
 488	public String getOriginalPath(Uri uri) {
 489		return FileUtils.getPath(mXmppConnectionService, uri);
 490	}
 491
 492	private void copyFileToPrivateStorage(File file, Uri uri) throws FileCopyException {
 493		Log.d(Config.LOGTAG, "copy file (" + uri.toString() + ") to private storage " + file.getAbsolutePath());
 494		file.getParentFile().mkdirs();
 495		OutputStream os = null;
 496		InputStream is = null;
 497		try {
 498			file.createNewFile();
 499			os = new FileOutputStream(file);
 500			is = mXmppConnectionService.getContentResolver().openInputStream(uri);
 501			byte[] buffer = new byte[1024];
 502			int length;
 503			while ((length = is.read(buffer)) > 0) {
 504				try {
 505					os.write(buffer, 0, length);
 506				} catch (IOException e) {
 507					throw new FileWriterException();
 508				}
 509			}
 510			try {
 511				os.flush();
 512			} catch (IOException e) {
 513				throw new FileWriterException();
 514			}
 515		} catch (FileNotFoundException e) {
 516			throw new FileCopyException(R.string.error_file_not_found);
 517		} catch (FileWriterException e) {
 518			throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
 519		} catch (IOException e) {
 520			e.printStackTrace();
 521			throw new FileCopyException(R.string.error_io_exception);
 522		} finally {
 523			close(os);
 524			close(is);
 525		}
 526	}
 527
 528	public void copyFileToPrivateStorage(Message message, Uri uri, String type) throws FileCopyException {
 529		String mime = type != null ? type : MimeUtils.guessMimeTypeFromUri(mXmppConnectionService, uri);
 530		Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage (mime=" + mime + ")");
 531		String extension = MimeUtils.guessExtensionFromMimeType(mime);
 532		if (extension == null) {
 533			Log.d(Config.LOGTAG, "extension from mime type was null");
 534			extension = getExtensionFromUri(uri);
 535		}
 536		if ("ogg".equals(extension) && type != null && type.startsWith("audio/")) {
 537			extension = "oga";
 538		}
 539		message.setRelativeFilePath(message.getUuid() + "." + extension);
 540		copyFileToPrivateStorage(mXmppConnectionService.getFileBackend().getFile(message), uri);
 541	}
 542
 543	private String getExtensionFromUri(Uri uri) {
 544		String[] projection = {MediaStore.MediaColumns.DATA};
 545		String filename = null;
 546		Cursor cursor = mXmppConnectionService.getContentResolver().query(uri, projection, null, null, null);
 547		if (cursor != null) {
 548			try {
 549				if (cursor.moveToFirst()) {
 550					filename = cursor.getString(0);
 551				}
 552			} catch (Exception e) {
 553				filename = null;
 554			} finally {
 555				cursor.close();
 556			}
 557		}
 558		if (filename == null) {
 559			final List<String> segments = uri.getPathSegments();
 560			if (segments.size() > 0) {
 561				filename = segments.get(segments.size() - 1);
 562			}
 563		}
 564		int pos = filename == null ? -1 : filename.lastIndexOf('.');
 565		return pos > 0 ? filename.substring(pos + 1) : null;
 566	}
 567
 568	private void copyImageToPrivateStorage(File file, Uri image, int sampleSize) throws FileCopyException {
 569		file.getParentFile().mkdirs();
 570		InputStream is = null;
 571		OutputStream os = null;
 572		try {
 573			if (!file.exists() && !file.createNewFile()) {
 574				throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
 575			}
 576			is = mXmppConnectionService.getContentResolver().openInputStream(image);
 577			if (is == null) {
 578				throw new FileCopyException(R.string.error_not_an_image_file);
 579			}
 580			Bitmap originalBitmap;
 581			BitmapFactory.Options options = new BitmapFactory.Options();
 582			int inSampleSize = (int) Math.pow(2, sampleSize);
 583			Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
 584			options.inSampleSize = inSampleSize;
 585			originalBitmap = BitmapFactory.decodeStream(is, null, options);
 586			is.close();
 587			if (originalBitmap == null) {
 588				throw new FileCopyException(R.string.error_not_an_image_file);
 589			}
 590			Bitmap scaledBitmap = resize(originalBitmap, Config.IMAGE_SIZE);
 591			int rotation = getRotation(image);
 592			scaledBitmap = rotate(scaledBitmap, rotation);
 593			boolean targetSizeReached = false;
 594			int quality = Config.IMAGE_QUALITY;
 595			final int imageMaxSize = mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize);
 596			while (!targetSizeReached) {
 597				os = new FileOutputStream(file);
 598				boolean success = scaledBitmap.compress(Config.IMAGE_FORMAT, quality, os);
 599				if (!success) {
 600					throw new FileCopyException(R.string.error_compressing_image);
 601				}
 602				os.flush();
 603				targetSizeReached = file.length() <= imageMaxSize || quality <= 50;
 604				quality -= 5;
 605			}
 606			scaledBitmap.recycle();
 607		} catch (FileNotFoundException e) {
 608			throw new FileCopyException(R.string.error_file_not_found);
 609		} catch (IOException e) {
 610			e.printStackTrace();
 611			throw new FileCopyException(R.string.error_io_exception);
 612		} catch (SecurityException e) {
 613			throw new FileCopyException(R.string.error_security_exception_during_image_copy);
 614		} catch (OutOfMemoryError e) {
 615			++sampleSize;
 616			if (sampleSize <= 3) {
 617				copyImageToPrivateStorage(file, image, sampleSize);
 618			} else {
 619				throw new FileCopyException(R.string.error_out_of_memory);
 620			}
 621		} finally {
 622			close(os);
 623			close(is);
 624		}
 625	}
 626
 627	public void copyImageToPrivateStorage(File file, Uri image) throws FileCopyException {
 628		Log.d(Config.LOGTAG, "copy image (" + image.toString() + ") to private storage " + file.getAbsolutePath());
 629		copyImageToPrivateStorage(file, image, 0);
 630	}
 631
 632	public void copyImageToPrivateStorage(Message message, Uri image) throws FileCopyException {
 633		switch (Config.IMAGE_FORMAT) {
 634			case JPEG:
 635				message.setRelativeFilePath(message.getUuid() + ".jpg");
 636				break;
 637			case PNG:
 638				message.setRelativeFilePath(message.getUuid() + ".png");
 639				break;
 640			case WEBP:
 641				message.setRelativeFilePath(message.getUuid() + ".webp");
 642				break;
 643		}
 644		copyImageToPrivateStorage(getFile(message), image);
 645		updateFileParams(message);
 646	}
 647
 648	private int getRotation(File file) {
 649		return getRotation(Uri.parse("file://" + file.getAbsolutePath()));
 650	}
 651
 652	private int getRotation(Uri image) {
 653		InputStream is = null;
 654		try {
 655			is = mXmppConnectionService.getContentResolver().openInputStream(image);
 656			return ExifHelper.getOrientation(is);
 657		} catch (FileNotFoundException e) {
 658			return 0;
 659		} finally {
 660			close(is);
 661		}
 662	}
 663
 664	public Bitmap getThumbnail(Message message, int size, boolean cacheOnly) throws IOException {
 665		final String uuid = message.getUuid();
 666		final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
 667		Bitmap thumbnail = cache.get(uuid);
 668		if ((thumbnail == null) && (!cacheOnly)) {
 669			synchronized (THUMBNAIL_LOCK) {
 670				thumbnail = cache.get(uuid);
 671				if (thumbnail != null) {
 672					return thumbnail;
 673				}
 674				DownloadableFile file = getFile(message);
 675				final String mime = file.getMimeType();
 676				if (mime.startsWith("video/")) {
 677					thumbnail = getVideoPreview(file, size);
 678				} else {
 679					Bitmap fullsize = getFullsizeImagePreview(file, size);
 680					if (fullsize == null) {
 681						throw new FileNotFoundException();
 682					}
 683					thumbnail = resize(fullsize, size);
 684					thumbnail = rotate(thumbnail, getRotation(file));
 685					if (mime.equals("image/gif")) {
 686						Bitmap withGifOverlay = thumbnail.copy(Bitmap.Config.ARGB_8888, true);
 687						drawOverlay(withGifOverlay, R.drawable.play_gif, 1.0f);
 688						thumbnail.recycle();
 689						thumbnail = withGifOverlay;
 690					}
 691				}
 692				this.mXmppConnectionService.getBitmapCache().put(uuid, thumbnail);
 693			}
 694		}
 695		return thumbnail;
 696	}
 697
 698	private Bitmap getFullsizeImagePreview(File file, int size) {
 699		BitmapFactory.Options options = new BitmapFactory.Options();
 700		options.inSampleSize = calcSampleSize(file, size);
 701		try {
 702			return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 703		} catch (OutOfMemoryError e) {
 704			options.inSampleSize *= 2;
 705			return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 706		}
 707	}
 708
 709	private void drawOverlay(Bitmap bitmap, int resource, float factor) {
 710		Bitmap overlay = BitmapFactory.decodeResource(mXmppConnectionService.getResources(), resource);
 711		Canvas canvas = new Canvas(bitmap);
 712		float targetSize = Math.min(canvas.getWidth(), canvas.getHeight()) * factor;
 713		Log.d(Config.LOGTAG, "target size overlay: " + targetSize + " overlay bitmap size was " + overlay.getHeight());
 714		float left = (canvas.getWidth() - targetSize) / 2.0f;
 715		float top = (canvas.getHeight() - targetSize) / 2.0f;
 716		RectF dst = new RectF(left, top, left + targetSize - 1, top + targetSize - 1);
 717		canvas.drawBitmap(overlay, null, dst, createAntiAliasingPaint());
 718	}
 719
 720	private Bitmap getVideoPreview(File file, int size) {
 721		MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
 722		Bitmap frame;
 723		try {
 724			metadataRetriever.setDataSource(file.getAbsolutePath());
 725			frame = metadataRetriever.getFrameAtTime(0);
 726			metadataRetriever.release();
 727			frame = resize(frame, size);
 728		} catch (IOException | RuntimeException e) {
 729			frame = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 730			frame.eraseColor(0xff000000);
 731		}
 732		drawOverlay(frame, R.drawable.play_video, 0.75f);
 733		return frame;
 734	}
 735
 736	public Uri getTakePhotoUri() {
 737		File file;
 738		if (Config.ONLY_INTERNAL_STORAGE) {
 739			file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath(), "Camera/IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
 740		} else {
 741			file = new File(getTakePhotoPath() + "IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
 742		}
 743		file.getParentFile().mkdirs();
 744		return getUriForFile(mXmppConnectionService, file);
 745	}
 746
 747	public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
 748		Bitmap bm = cropCenterSquare(image, size);
 749		if (bm == null) {
 750			return null;
 751		}
 752		if (hasAlpha(bm)) {
 753			Log.d(Config.LOGTAG, "alpha in avatar detected; uploading as PNG");
 754			bm.recycle();
 755			bm = cropCenterSquare(image, 96);
 756			return getPepAvatar(bm, Bitmap.CompressFormat.PNG, 100);
 757		}
 758		return getPepAvatar(bm, format, 100);
 759	}
 760
 761	private Avatar getPepAvatar(Bitmap bitmap, Bitmap.CompressFormat format, int quality) {
 762		try {
 763			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
 764			Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
 765			MessageDigest digest = MessageDigest.getInstance("SHA-1");
 766			DigestOutputStream mDigestOutputStream = new DigestOutputStream(mBase64OutputStream, digest);
 767			if (!bitmap.compress(format, quality, mDigestOutputStream)) {
 768				return null;
 769			}
 770			mDigestOutputStream.flush();
 771			mDigestOutputStream.close();
 772			long chars = mByteArrayOutputStream.size();
 773			if (format != Bitmap.CompressFormat.PNG && quality >= 50 && chars >= Config.AVATAR_CHAR_LIMIT) {
 774				int q = quality - 2;
 775				Log.d(Config.LOGTAG, "avatar char length was " + chars + " reducing quality to " + q);
 776				return getPepAvatar(bitmap, format, q);
 777			}
 778			Log.d(Config.LOGTAG, "settled on char length " + chars + " with quality=" + quality);
 779			final Avatar avatar = new Avatar();
 780			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
 781			avatar.image = new String(mByteArrayOutputStream.toByteArray());
 782			if (format.equals(Bitmap.CompressFormat.WEBP)) {
 783				avatar.type = "image/webp";
 784			} else if (format.equals(Bitmap.CompressFormat.JPEG)) {
 785				avatar.type = "image/jpeg";
 786			} else if (format.equals(Bitmap.CompressFormat.PNG)) {
 787				avatar.type = "image/png";
 788			}
 789			avatar.width = bitmap.getWidth();
 790			avatar.height = bitmap.getHeight();
 791			return avatar;
 792		} catch (Exception e) {
 793			return null;
 794		}
 795	}
 796
 797	public Avatar getStoredPepAvatar(String hash) {
 798		if (hash == null) {
 799			return null;
 800		}
 801		Avatar avatar = new Avatar();
 802		File file = new File(getAvatarPath(hash));
 803		FileInputStream is = null;
 804		try {
 805			avatar.size = file.length();
 806			BitmapFactory.Options options = new BitmapFactory.Options();
 807			options.inJustDecodeBounds = true;
 808			BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 809			is = new FileInputStream(file);
 810			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
 811			Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
 812			MessageDigest digest = MessageDigest.getInstance("SHA-1");
 813			DigestOutputStream os = new DigestOutputStream(mBase64OutputStream, digest);
 814			byte[] buffer = new byte[4096];
 815			int length;
 816			while ((length = is.read(buffer)) > 0) {
 817				os.write(buffer, 0, length);
 818			}
 819			os.flush();
 820			os.close();
 821			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
 822			avatar.image = new String(mByteArrayOutputStream.toByteArray());
 823			avatar.height = options.outHeight;
 824			avatar.width = options.outWidth;
 825			avatar.type = options.outMimeType;
 826			return avatar;
 827		} catch (NoSuchAlgorithmException | IOException e) {
 828			return null;
 829		} finally {
 830			close(is);
 831		}
 832	}
 833
 834	public boolean isAvatarCached(Avatar avatar) {
 835		File file = new File(getAvatarPath(avatar.getFilename()));
 836		return file.exists();
 837	}
 838
 839	public boolean save(final Avatar avatar) {
 840		File file;
 841		if (isAvatarCached(avatar)) {
 842			file = new File(getAvatarPath(avatar.getFilename()));
 843			avatar.size = file.length();
 844		} else {
 845			file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath() + "/" + UUID.randomUUID().toString());
 846			if (file.getParentFile().mkdirs()) {
 847				Log.d(Config.LOGTAG, "created cache directory");
 848			}
 849			OutputStream os = null;
 850			try {
 851				if (!file.createNewFile()) {
 852					Log.d(Config.LOGTAG, "unable to create temporary file " + file.getAbsolutePath());
 853				}
 854				os = new FileOutputStream(file);
 855				MessageDigest digest = MessageDigest.getInstance("SHA-1");
 856				digest.reset();
 857				DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
 858				final byte[] bytes = avatar.getImageAsBytes();
 859				mDigestOutputStream.write(bytes);
 860				mDigestOutputStream.flush();
 861				mDigestOutputStream.close();
 862				String sha1sum = CryptoHelper.bytesToHex(digest.digest());
 863				if (sha1sum.equals(avatar.sha1sum)) {
 864					File outputFile = new File(getAvatarPath(avatar.getFilename()));
 865					if (outputFile.getParentFile().mkdirs()) {
 866						Log.d(Config.LOGTAG, "created avatar directory");
 867					}
 868					String filename = getAvatarPath(avatar.getFilename());
 869					if (!file.renameTo(new File(filename))) {
 870						Log.d(Config.LOGTAG, "unable to rename " + file.getAbsolutePath() + " to " + outputFile);
 871						return false;
 872					}
 873				} else {
 874					Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
 875					if (!file.delete()) {
 876						Log.d(Config.LOGTAG, "unable to delete temporary file");
 877					}
 878					return false;
 879				}
 880				avatar.size = bytes.length;
 881			} catch (IllegalArgumentException | IOException | NoSuchAlgorithmException e) {
 882				return false;
 883			} finally {
 884				close(os);
 885			}
 886		}
 887		return true;
 888	}
 889
 890	private String getAvatarPath(String avatar) {
 891		return mXmppConnectionService.getFilesDir().getAbsolutePath() + "/avatars/" + avatar;
 892	}
 893
 894	public Uri getAvatarUri(String avatar) {
 895		return Uri.parse("file:" + getAvatarPath(avatar));
 896	}
 897
 898	public Bitmap cropCenterSquare(Uri image, int size) {
 899		if (image == null) {
 900			return null;
 901		}
 902		InputStream is = null;
 903		try {
 904			BitmapFactory.Options options = new BitmapFactory.Options();
 905			options.inSampleSize = calcSampleSize(image, size);
 906			is = mXmppConnectionService.getContentResolver().openInputStream(image);
 907			if (is == null) {
 908				return null;
 909			}
 910			Bitmap input = BitmapFactory.decodeStream(is, null, options);
 911			if (input == null) {
 912				return null;
 913			} else {
 914				input = rotate(input, getRotation(image));
 915				return cropCenterSquare(input, size);
 916			}
 917		} catch (FileNotFoundException | SecurityException e) {
 918			return null;
 919		} finally {
 920			close(is);
 921		}
 922	}
 923
 924	public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
 925		if (image == null) {
 926			return null;
 927		}
 928		InputStream is = null;
 929		try {
 930			BitmapFactory.Options options = new BitmapFactory.Options();
 931			options.inSampleSize = calcSampleSize(image, Math.max(newHeight, newWidth));
 932			is = mXmppConnectionService.getContentResolver().openInputStream(image);
 933			if (is == null) {
 934				return null;
 935			}
 936			Bitmap source = BitmapFactory.decodeStream(is, null, options);
 937			if (source == null) {
 938				return null;
 939			}
 940			int sourceWidth = source.getWidth();
 941			int sourceHeight = source.getHeight();
 942			float xScale = (float) newWidth / sourceWidth;
 943			float yScale = (float) newHeight / sourceHeight;
 944			float scale = Math.max(xScale, yScale);
 945			float scaledWidth = scale * sourceWidth;
 946			float scaledHeight = scale * sourceHeight;
 947			float left = (newWidth - scaledWidth) / 2;
 948			float top = (newHeight - scaledHeight) / 2;
 949
 950			RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
 951			Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
 952			Canvas canvas = new Canvas(dest);
 953			canvas.drawBitmap(source, null, targetRect, createAntiAliasingPaint());
 954			if (source.isRecycled()) {
 955				source.recycle();
 956			}
 957			return dest;
 958		} catch (SecurityException e) {
 959			return null; //android 6.0 with revoked permissions for example
 960		} catch (FileNotFoundException e) {
 961			return null;
 962		} finally {
 963			close(is);
 964		}
 965	}
 966
 967	public Bitmap cropCenterSquare(Bitmap input, int size) {
 968		int w = input.getWidth();
 969		int h = input.getHeight();
 970
 971		float scale = Math.max((float) size / h, (float) size / w);
 972
 973		float outWidth = scale * w;
 974		float outHeight = scale * h;
 975		float left = (size - outWidth) / 2;
 976		float top = (size - outHeight) / 2;
 977		RectF target = new RectF(left, top, left + outWidth, top + outHeight);
 978
 979		Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 980		Canvas canvas = new Canvas(output);
 981		canvas.drawBitmap(input, null, target, createAntiAliasingPaint());
 982		if (!input.isRecycled()) {
 983			input.recycle();
 984		}
 985		return output;
 986	}
 987
 988	private int calcSampleSize(Uri image, int size) throws FileNotFoundException, SecurityException {
 989		BitmapFactory.Options options = new BitmapFactory.Options();
 990		options.inJustDecodeBounds = true;
 991		BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
 992		return calcSampleSize(options, size);
 993	}
 994
 995	public void updateFileParams(Message message) {
 996		updateFileParams(message, null);
 997	}
 998
 999	public void updateFileParams(Message message, URL url) {
1000		DownloadableFile file = getFile(message);
1001		final String mime = file.getMimeType();
1002		boolean image = message.getType() == Message.TYPE_IMAGE || (mime != null && mime.startsWith("image/"));
1003		boolean video = mime != null && mime.startsWith("video/");
1004		boolean audio = mime != null && mime.startsWith("audio/");
1005		final StringBuilder body = new StringBuilder();
1006		if (url != null) {
1007			body.append(url.toString());
1008		}
1009		body.append('|').append(file.getSize());
1010		if (image || video) {
1011			try {
1012				Dimensions dimensions = image ? getImageDimensions(file) : getVideoDimensions(file);
1013				if (dimensions.valid()) {
1014					body.append('|').append(dimensions.width).append('|').append(dimensions.height);
1015				}
1016			} catch (NotAVideoFile notAVideoFile) {
1017				Log.d(Config.LOGTAG, "file with mime type " + file.getMimeType() + " was not a video file");
1018				//fall threw
1019			}
1020		} else if (audio) {
1021			body.append("|0|0|").append(getMediaRuntime(file));
1022		}
1023		message.setBody(body.toString());
1024	}
1025
1026	public int getMediaRuntime(Uri uri) {
1027		try {
1028			MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
1029			mediaMetadataRetriever.setDataSource(mXmppConnectionService, uri);
1030			return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
1031		} catch (RuntimeException e) {
1032			return 0;
1033		}
1034	}
1035
1036	private int getMediaRuntime(File file) {
1037		try {
1038			MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
1039			mediaMetadataRetriever.setDataSource(file.toString());
1040			return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
1041		} catch (RuntimeException e) {
1042			return 0;
1043		}
1044	}
1045
1046	private Dimensions getImageDimensions(File file) {
1047		BitmapFactory.Options options = new BitmapFactory.Options();
1048		options.inJustDecodeBounds = true;
1049		BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1050		int rotation = getRotation(file);
1051		boolean rotated = rotation == 90 || rotation == 270;
1052		int imageHeight = rotated ? options.outWidth : options.outHeight;
1053		int imageWidth = rotated ? options.outHeight : options.outWidth;
1054		return new Dimensions(imageHeight, imageWidth);
1055	}
1056
1057	private Dimensions getVideoDimensions(File file) throws NotAVideoFile {
1058		MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
1059		try {
1060			metadataRetriever.setDataSource(file.getAbsolutePath());
1061		} catch (RuntimeException e) {
1062			throw new NotAVideoFile(e);
1063		}
1064		return getVideoDimensions(metadataRetriever);
1065	}
1066
1067	public Bitmap getAvatar(String avatar, int size) {
1068		if (avatar == null) {
1069			return null;
1070		}
1071		Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
1072		if (bm == null) {
1073			return null;
1074		}
1075		return bm;
1076	}
1077
1078	public boolean isFileAvailable(Message message) {
1079		return getFile(message).exists();
1080	}
1081
1082	private static class Dimensions {
1083		public final int width;
1084		public final int height;
1085
1086		Dimensions(int height, int width) {
1087			this.width = width;
1088			this.height = height;
1089		}
1090
1091		public int getMin() {
1092			return Math.min(width, height);
1093		}
1094
1095		public boolean valid() {
1096			return width > 0 && height > 0;
1097		}
1098	}
1099
1100	private static class NotAVideoFile extends Exception {
1101		public NotAVideoFile(Throwable t) {
1102			super(t);
1103		}
1104
1105		public NotAVideoFile() {
1106			super();
1107		}
1108	}
1109
1110	public class FileCopyException extends Exception {
1111		private static final long serialVersionUID = -1010013599132881427L;
1112		private int resId;
1113
1114		public FileCopyException(int resId) {
1115			this.resId = resId;
1116		}
1117
1118		public int getResId() {
1119			return resId;
1120		}
1121	}
1122}