1package eu.siacs.conversations.persistance;
   2
   3import android.content.ContentResolver;
   4import android.content.Context;
   5import android.database.Cursor;
   6import android.graphics.Bitmap;
   7import android.graphics.BitmapFactory;
   8import android.graphics.Canvas;
   9import android.graphics.Color;
  10import android.graphics.Matrix;
  11import android.graphics.Paint;
  12import android.graphics.RectF;
  13import android.graphics.pdf.PdfRenderer;
  14import android.media.MediaMetadataRetriever;
  15import android.media.MediaScannerConnection;
  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.system.Os;
  23import android.system.StructStat;
  24import android.util.Base64;
  25import android.util.Base64OutputStream;
  26import android.util.DisplayMetrics;
  27import android.util.Log;
  28import android.util.LruCache;
  29
  30import androidx.annotation.RequiresApi;
  31import androidx.annotation.StringRes;
  32import androidx.core.content.FileProvider;
  33import androidx.exifinterface.media.ExifInterface;
  34
  35import com.google.common.base.Strings;
  36import com.google.common.collect.ImmutableList;
  37import com.google.common.io.ByteStreams;
  38
  39import java.io.ByteArrayOutputStream;
  40import java.io.Closeable;
  41import java.io.File;
  42import java.io.FileDescriptor;
  43import java.io.FileInputStream;
  44import java.io.FileNotFoundException;
  45import java.io.FileOutputStream;
  46import java.io.IOException;
  47import java.io.InputStream;
  48import java.io.OutputStream;
  49import java.net.ServerSocket;
  50import java.net.Socket;
  51import java.security.DigestOutputStream;
  52import java.security.MessageDigest;
  53import java.security.NoSuchAlgorithmException;
  54import java.text.SimpleDateFormat;
  55import java.util.ArrayList;
  56import java.util.Date;
  57import java.util.List;
  58import java.util.Locale;
  59import java.util.UUID;
  60
  61import eu.siacs.conversations.Config;
  62import eu.siacs.conversations.R;
  63import eu.siacs.conversations.entities.DownloadableFile;
  64import eu.siacs.conversations.entities.Message;
  65import eu.siacs.conversations.services.AttachFileToConversationRunnable;
  66import eu.siacs.conversations.services.XmppConnectionService;
  67import eu.siacs.conversations.ui.adapter.MediaAdapter;
  68import eu.siacs.conversations.ui.util.Attachment;
  69import eu.siacs.conversations.utils.CryptoHelper;
  70import eu.siacs.conversations.utils.FileUtils;
  71import eu.siacs.conversations.utils.FileWriterException;
  72import eu.siacs.conversations.utils.MimeUtils;
  73import eu.siacs.conversations.xmpp.pep.Avatar;
  74
  75public class FileBackend {
  76
  77    private static final Object THUMBNAIL_LOCK = new Object();
  78
  79    private static final SimpleDateFormat IMAGE_DATE_FORMAT =
  80            new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US);
  81
  82    private static final String FILE_PROVIDER = ".files";
  83    private static final float IGNORE_PADDING = 0.15f;
  84    private final XmppConnectionService mXmppConnectionService;
  85
  86    private static final List<String> STORAGE_TYPES;
  87
  88    static {
  89        final ImmutableList.Builder<String> builder =
  90                new ImmutableList.Builder<String>()
  91                        .add(
  92                                Environment.DIRECTORY_DOWNLOADS,
  93                                Environment.DIRECTORY_PICTURES,
  94                                Environment.DIRECTORY_MOVIES,
  95                                Environment.DIRECTORY_DOCUMENTS);
  96        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
  97            builder.add(Environment.DIRECTORY_RECORDINGS);
  98        }
  99        STORAGE_TYPES = builder.build();
 100    }
 101
 102    public FileBackend(XmppConnectionService service) {
 103        this.mXmppConnectionService = service;
 104    }
 105
 106    public static long getFileSize(Context context, Uri uri) {
 107        try (final Cursor cursor =
 108                context.getContentResolver().query(uri, null, null, null, null)) {
 109            if (cursor != null && cursor.moveToFirst()) {
 110                final int index = cursor.getColumnIndex(OpenableColumns.SIZE);
 111                if (index == -1) {
 112                    return -1;
 113                }
 114                return cursor.getLong(index);
 115            }
 116            return -1;
 117        } catch (final Exception ignored) {
 118            return -1;
 119        }
 120    }
 121
 122    public static boolean allFilesUnderSize(
 123            Context context, List<Attachment> attachments, long max) {
 124        final boolean compressVideo =
 125                !AttachFileToConversationRunnable.getVideoCompression(context)
 126                        .equals("uncompressed");
 127        if (max <= 0) {
 128            Log.d(Config.LOGTAG, "server did not report max file size for http upload");
 129            return true; // exception to be compatible with HTTP Upload < v0.2
 130        }
 131        for (Attachment attachment : attachments) {
 132            if (attachment.getType() != Attachment.Type.FILE) {
 133                continue;
 134            }
 135            String mime = attachment.getMime();
 136            if (mime != null && mime.startsWith("video/") && compressVideo) {
 137                try {
 138                    Dimensions dimensions =
 139                            FileBackend.getVideoDimensions(context, attachment.getUri());
 140                    if (dimensions.getMin() > 720) {
 141                        Log.d(
 142                                Config.LOGTAG,
 143                                "do not consider video file with min width larger than 720 for size check");
 144                        continue;
 145                    }
 146                } catch (final IOException | NotAVideoFile e) {
 147                    // ignore and fall through
 148                }
 149            }
 150            if (FileBackend.getFileSize(context, attachment.getUri()) > max) {
 151                Log.d(
 152                        Config.LOGTAG,
 153                        "not all files are under "
 154                                + max
 155                                + " bytes. suggesting falling back to jingle");
 156                return false;
 157            }
 158        }
 159        return true;
 160    }
 161
 162    public static File getBackupDirectory(final Context context) {
 163        final File conversationsDownloadDirectory =
 164                new File(
 165                        Environment.getExternalStoragePublicDirectory(
 166                                Environment.DIRECTORY_DOWNLOADS),
 167                        context.getString(R.string.app_name));
 168        return new File(conversationsDownloadDirectory, "Backup");
 169    }
 170
 171    public static File getLegacyBackupDirectory(final String app) {
 172        final File appDirectory = new File(Environment.getExternalStorageDirectory(), app);
 173        return new File(appDirectory, "Backup");
 174    }
 175
 176    private static Bitmap rotate(final Bitmap bitmap, final int degree) {
 177        if (degree == 0) {
 178            return bitmap;
 179        }
 180        final int w = bitmap.getWidth();
 181        final int h = bitmap.getHeight();
 182        final Matrix matrix = new Matrix();
 183        matrix.postRotate(degree);
 184        final Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix, true);
 185        if (!bitmap.isRecycled()) {
 186            bitmap.recycle();
 187        }
 188        return result;
 189    }
 190
 191    public static boolean isPathBlacklisted(String path) {
 192        final String androidDataPath =
 193                Environment.getExternalStorageDirectory().getAbsolutePath() + "/Android/data/";
 194        return path.startsWith(androidDataPath);
 195    }
 196
 197    private static Paint createAntiAliasingPaint() {
 198        Paint paint = new Paint();
 199        paint.setAntiAlias(true);
 200        paint.setFilterBitmap(true);
 201        paint.setDither(true);
 202        return paint;
 203    }
 204
 205    public static Uri getUriForUri(Context context, Uri uri) {
 206        if ("file".equals(uri.getScheme())) {
 207            return getUriForFile(context, new File(uri.getPath()));
 208        } else {
 209            return uri;
 210        }
 211    }
 212
 213    public static Uri getUriForFile(Context context, File file) {
 214        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N || Config.ONLY_INTERNAL_STORAGE) {
 215            try {
 216                return FileProvider.getUriForFile(context, getAuthority(context), file);
 217            } catch (IllegalArgumentException e) {
 218                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 219                    throw new SecurityException(e);
 220                } else {
 221                    return Uri.fromFile(file);
 222                }
 223            }
 224        } else {
 225            return Uri.fromFile(file);
 226        }
 227    }
 228
 229    public static String getAuthority(Context context) {
 230        return context.getPackageName() + FILE_PROVIDER;
 231    }
 232
 233    private static boolean hasAlpha(final Bitmap bitmap) {
 234        final int w = bitmap.getWidth();
 235        final int h = bitmap.getHeight();
 236        final int yStep = Math.max(1, w / 100);
 237        final int xStep = Math.max(1, h / 100);
 238        for (int x = 0; x < w; x += xStep) {
 239            for (int y = 0; y < h; y += yStep) {
 240                if (Color.alpha(bitmap.getPixel(x, y)) < 255) {
 241                    return true;
 242                }
 243            }
 244        }
 245        return false;
 246    }
 247
 248    private static int calcSampleSize(File image, int size) {
 249        BitmapFactory.Options options = new BitmapFactory.Options();
 250        options.inJustDecodeBounds = true;
 251        BitmapFactory.decodeFile(image.getAbsolutePath(), options);
 252        return calcSampleSize(options, size);
 253    }
 254
 255    private static int calcSampleSize(BitmapFactory.Options options, int size) {
 256        int height = options.outHeight;
 257        int width = options.outWidth;
 258        int inSampleSize = 1;
 259
 260        if (height > size || width > size) {
 261            int halfHeight = height / 2;
 262            int halfWidth = width / 2;
 263
 264            while ((halfHeight / inSampleSize) > size && (halfWidth / inSampleSize) > size) {
 265                inSampleSize *= 2;
 266            }
 267        }
 268        return inSampleSize;
 269    }
 270
 271    private static Dimensions getVideoDimensions(Context context, Uri uri) throws NotAVideoFile, IOException {
 272        MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
 273        try {
 274            mediaMetadataRetriever.setDataSource(context, uri);
 275        } catch (RuntimeException e) {
 276            throw new NotAVideoFile(e);
 277        }
 278        return getVideoDimensions(mediaMetadataRetriever);
 279    }
 280
 281    private static Dimensions getVideoDimensionsOfFrame(
 282            MediaMetadataRetriever mediaMetadataRetriever) {
 283        Bitmap bitmap = null;
 284        try {
 285            bitmap = mediaMetadataRetriever.getFrameAtTime();
 286            return new Dimensions(bitmap.getHeight(), bitmap.getWidth());
 287        } catch (Exception e) {
 288            return null;
 289        } finally {
 290            if (bitmap != null) {
 291                bitmap.recycle();
 292            }
 293        }
 294    }
 295
 296    private static Dimensions getVideoDimensions(MediaMetadataRetriever metadataRetriever)
 297            throws NotAVideoFile, IOException {
 298        String hasVideo =
 299                metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_HAS_VIDEO);
 300        if (hasVideo == null) {
 301            throw new NotAVideoFile();
 302        }
 303        Dimensions dimensions = getVideoDimensionsOfFrame(metadataRetriever);
 304        if (dimensions != null) {
 305            return dimensions;
 306        }
 307        final int rotation = extractRotationFromMediaRetriever(metadataRetriever);
 308        boolean rotated = rotation == 90 || rotation == 270;
 309        int height;
 310        try {
 311            String h =
 312                    metadataRetriever.extractMetadata(
 313                            MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
 314            height = Integer.parseInt(h);
 315        } catch (Exception e) {
 316            height = -1;
 317        }
 318        int width;
 319        try {
 320            String w =
 321                    metadataRetriever.extractMetadata(
 322                            MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
 323            width = Integer.parseInt(w);
 324        } catch (Exception e) {
 325            width = -1;
 326        }
 327        metadataRetriever.release();
 328        Log.d(Config.LOGTAG, "extracted video dims " + width + "x" + height);
 329        return rotated ? new Dimensions(width, height) : new Dimensions(height, width);
 330    }
 331
 332    private static int extractRotationFromMediaRetriever(MediaMetadataRetriever metadataRetriever) {
 333        String r =
 334                metadataRetriever.extractMetadata(
 335                        MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
 336        try {
 337            return Integer.parseInt(r);
 338        } catch (Exception e) {
 339            return 0;
 340        }
 341    }
 342
 343    public static void close(final Closeable stream) {
 344        if (stream != null) {
 345            try {
 346                stream.close();
 347            } catch (Exception e) {
 348                Log.d(Config.LOGTAG, "unable to close stream", e);
 349            }
 350        }
 351    }
 352
 353    public static void close(final Socket socket) {
 354        if (socket != null) {
 355            try {
 356                socket.close();
 357            } catch (IOException e) {
 358                Log.d(Config.LOGTAG, "unable to close socket", e);
 359            }
 360        }
 361    }
 362
 363    public static void close(final ServerSocket socket) {
 364        if (socket != null) {
 365            try {
 366                socket.close();
 367            } catch (IOException e) {
 368                Log.d(Config.LOGTAG, "unable to close server socket", e);
 369            }
 370        }
 371    }
 372
 373    public static boolean weOwnFile(final Uri uri) {
 374        if (uri == null || !ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {
 375            return false;
 376        } else {
 377            return weOwnFileLollipop(uri);
 378        }
 379    }
 380
 381    private static boolean weOwnFileLollipop(final Uri uri) {
 382        final String path = uri.getPath();
 383        if (path == null) {
 384            return false;
 385        }
 386        try {
 387            File file = new File(path);
 388            FileDescriptor fd =
 389                    ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY)
 390                            .getFileDescriptor();
 391            StructStat st = Os.fstat(fd);
 392            return st.st_uid == android.os.Process.myUid();
 393        } catch (FileNotFoundException e) {
 394            return false;
 395        } catch (Exception e) {
 396            return true;
 397        }
 398    }
 399
 400    public static Uri getMediaUri(Context context, File file) {
 401        final String filePath = file.getAbsolutePath();
 402        try (final Cursor cursor =
 403                context.getContentResolver()
 404                        .query(
 405                                MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
 406                                new String[] {MediaStore.Images.Media._ID},
 407                                MediaStore.Images.Media.DATA + "=? ",
 408                                new String[] {filePath},
 409                                null)) {
 410            if (cursor != null && cursor.moveToFirst()) {
 411                final int id =
 412                        cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.MediaColumns._ID));
 413                return Uri.withAppendedPath(
 414                        MediaStore.Images.Media.EXTERNAL_CONTENT_URI, String.valueOf(id));
 415            } else {
 416                return null;
 417            }
 418        } catch (final Exception e) {
 419            return null;
 420        }
 421    }
 422
 423    public static void updateFileParams(Message message, String url, long size) {
 424        final StringBuilder body = new StringBuilder();
 425        body.append(url).append('|').append(size);
 426        message.setBody(body.toString());
 427    }
 428
 429    public Bitmap getPreviewForUri(Attachment attachment, int size, boolean cacheOnly) {
 430        final String key = "attachment_" + attachment.getUuid().toString() + "_" + size;
 431        final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
 432        Bitmap bitmap = cache.get(key);
 433        if (bitmap != null || cacheOnly) {
 434            return bitmap;
 435        }
 436        final String mime = attachment.getMime();
 437        if ("application/pdf".equals(mime)) {
 438            bitmap = cropCenterSquarePdf(attachment.getUri(), size);
 439            drawOverlay(
 440                    bitmap,
 441                    paintOverlayBlackPdf(bitmap)
 442                            ? R.drawable.open_pdf_black
 443                            : R.drawable.open_pdf_white,
 444                    0.75f);
 445        } else if (mime != null && mime.startsWith("video/")) {
 446            bitmap = cropCenterSquareVideo(attachment.getUri(), size);
 447            drawOverlay(
 448                    bitmap,
 449                    paintOverlayBlack(bitmap)
 450                            ? R.drawable.play_video_black
 451                            : R.drawable.play_video_white,
 452                    0.75f);
 453        } else {
 454            bitmap = cropCenterSquare(attachment.getUri(), size);
 455            if (bitmap != null && "image/gif".equals(mime)) {
 456                Bitmap withGifOverlay = bitmap.copy(Bitmap.Config.ARGB_8888, true);
 457                drawOverlay(
 458                        withGifOverlay,
 459                        paintOverlayBlack(withGifOverlay)
 460                                ? R.drawable.play_gif_black
 461                                : R.drawable.play_gif_white,
 462                        1.0f);
 463                bitmap.recycle();
 464                bitmap = withGifOverlay;
 465            }
 466        }
 467        if (bitmap != null) {
 468            cache.put(key, bitmap);
 469        }
 470        return bitmap;
 471    }
 472
 473    public void updateMediaScanner(File file) {
 474        updateMediaScanner(file, null);
 475    }
 476
 477    public void updateMediaScanner(File file, final Runnable callback) {
 478        MediaScannerConnection.scanFile(
 479                mXmppConnectionService,
 480                new String[] {file.getAbsolutePath()},
 481                null,
 482                new MediaScannerConnection.MediaScannerConnectionClient() {
 483                    @Override
 484                    public void onMediaScannerConnected() {}
 485
 486                    @Override
 487                    public void onScanCompleted(String path, Uri uri) {
 488                        if (callback != null && file.getAbsolutePath().equals(path)) {
 489                            callback.run();
 490                        } else {
 491                            Log.d(Config.LOGTAG, "media scanner scanned wrong file");
 492                            if (callback != null) {
 493                                callback.run();
 494                            }
 495                        }
 496                    }
 497                });
 498    }
 499
 500    public boolean deleteFile(Message message) {
 501        File file = getFile(message);
 502        if (file.delete()) {
 503            updateMediaScanner(file);
 504            return true;
 505        } else {
 506            return false;
 507        }
 508    }
 509
 510    public DownloadableFile getFile(Message message) {
 511        return getFile(message, true);
 512    }
 513
 514    public DownloadableFile getFileForPath(String path) {
 515        return getFileForPath(
 516                path,
 517                MimeUtils.guessMimeTypeFromExtension(MimeUtils.extractRelevantExtension(path)));
 518    }
 519
 520    private DownloadableFile getFileForPath(final String path, final String mime) {
 521        if (path.startsWith("/")) {
 522            return new DownloadableFile(path);
 523        } else {
 524            return getLegacyFileForFilename(path, mime);
 525        }
 526    }
 527
 528    public DownloadableFile getLegacyFileForFilename(final String filename, final String mime) {
 529        if (Strings.isNullOrEmpty(mime)) {
 530            return new DownloadableFile(getLegacyStorageLocation("Files"), filename);
 531        } else if (mime.startsWith("image/")) {
 532            return new DownloadableFile(getLegacyStorageLocation("Images"), filename);
 533        } else if (mime.startsWith("video/")) {
 534            return new DownloadableFile(getLegacyStorageLocation("Videos"), filename);
 535        } else {
 536            return new DownloadableFile(getLegacyStorageLocation("Files"), filename);
 537        }
 538    }
 539
 540    public boolean isInternalFile(final File file) {
 541        final File internalFile = getFileForPath(file.getName());
 542        return file.getAbsolutePath().equals(internalFile.getAbsolutePath());
 543    }
 544
 545    public DownloadableFile getFile(Message message, boolean decrypted) {
 546        final boolean encrypted =
 547                !decrypted
 548                        && (message.getEncryption() == Message.ENCRYPTION_PGP
 549                                || message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
 550        String path = message.getRelativeFilePath();
 551        if (path == null) {
 552            path = message.getUuid();
 553        }
 554        final DownloadableFile file = getFileForPath(path, message.getMimeType());
 555        if (encrypted) {
 556            return new DownloadableFile(
 557                    mXmppConnectionService.getCacheDir(),
 558                    String.format("%s.%s", file.getName(), "pgp"));
 559        } else {
 560            return file;
 561        }
 562    }
 563
 564    public List<Attachment> convertToAttachments(List<DatabaseBackend.FilePath> relativeFilePaths) {
 565        final List<Attachment> attachments = new ArrayList<>();
 566        for (final DatabaseBackend.FilePath relativeFilePath : relativeFilePaths) {
 567            final String mime =
 568                    MimeUtils.guessMimeTypeFromExtension(
 569                            MimeUtils.extractRelevantExtension(relativeFilePath.path));
 570            final File file = getFileForPath(relativeFilePath.path, mime);
 571            attachments.add(Attachment.of(relativeFilePath.uuid, file, mime));
 572        }
 573        return attachments;
 574    }
 575
 576    private File getLegacyStorageLocation(final String type) {
 577        if (Config.ONLY_INTERNAL_STORAGE) {
 578            return new File(mXmppConnectionService.getFilesDir(), type);
 579        } else {
 580            final File appDirectory =
 581                    new File(
 582                            Environment.getExternalStorageDirectory(),
 583                            mXmppConnectionService.getString(R.string.app_name));
 584            final File appMediaDirectory = new File(appDirectory, "Media");
 585            final String locationName =
 586                    String.format(
 587                            "%s %s", mXmppConnectionService.getString(R.string.app_name), type);
 588            return new File(appMediaDirectory, locationName);
 589        }
 590    }
 591
 592    private Bitmap resize(final Bitmap originalBitmap, int size) throws IOException {
 593        int w = originalBitmap.getWidth();
 594        int h = originalBitmap.getHeight();
 595        if (w <= 0 || h <= 0) {
 596            throw new IOException("Decoded bitmap reported bounds smaller 0");
 597        } else if (Math.max(w, h) > size) {
 598            int scalledW;
 599            int scalledH;
 600            if (w <= h) {
 601                scalledW = Math.max((int) (w / ((double) h / size)), 1);
 602                scalledH = size;
 603            } else {
 604                scalledW = size;
 605                scalledH = Math.max((int) (h / ((double) w / size)), 1);
 606            }
 607            final Bitmap result =
 608                    Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
 609            if (!originalBitmap.isRecycled()) {
 610                originalBitmap.recycle();
 611            }
 612            return result;
 613        } else {
 614            return originalBitmap;
 615        }
 616    }
 617
 618    public boolean useImageAsIs(final Uri uri) {
 619        final String path = getOriginalPath(uri);
 620        if (path == null || isPathBlacklisted(path)) {
 621            return false;
 622        }
 623        final File file = new File(path);
 624        long size = file.length();
 625        if (size == 0
 626                || size
 627                        >= mXmppConnectionService
 628                                .getResources()
 629                                .getInteger(R.integer.auto_accept_filesize)) {
 630            return false;
 631        }
 632        BitmapFactory.Options options = new BitmapFactory.Options();
 633        options.inJustDecodeBounds = true;
 634        try {
 635            final InputStream inputStream =
 636                    mXmppConnectionService.getContentResolver().openInputStream(uri);
 637            BitmapFactory.decodeStream(inputStream, null, options);
 638            close(inputStream);
 639            if (options.outMimeType == null || options.outHeight <= 0 || options.outWidth <= 0) {
 640                return false;
 641            }
 642            return (options.outWidth <= Config.IMAGE_SIZE
 643                    && options.outHeight <= Config.IMAGE_SIZE
 644                    && options.outMimeType.contains(Config.IMAGE_FORMAT.name().toLowerCase()));
 645        } catch (FileNotFoundException e) {
 646            Log.d(Config.LOGTAG, "unable to get image dimensions", e);
 647            return false;
 648        }
 649    }
 650
 651    public String getOriginalPath(final Uri uri) {
 652        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
 653            // On Android 11+ we don’t have access to the original file
 654            return null;
 655        } else {
 656            return FileUtils.getPath(mXmppConnectionService, uri);
 657        }
 658    }
 659
 660    private void copyFileToPrivateStorage(File file, Uri uri) throws FileCopyException {
 661        Log.d(
 662                Config.LOGTAG,
 663                "copy file (" + uri.toString() + ") to private storage " + file.getAbsolutePath());
 664        file.getParentFile().mkdirs();
 665        try {
 666            file.createNewFile();
 667        } catch (IOException e) {
 668            throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
 669        }
 670        try (final OutputStream os = new FileOutputStream(file);
 671                final InputStream is =
 672                        mXmppConnectionService.getContentResolver().openInputStream(uri)) {
 673            if (is == null) {
 674                throw new FileCopyException(R.string.error_file_not_found);
 675            }
 676            try {
 677                ByteStreams.copy(is, os);
 678            } catch (IOException e) {
 679                throw new FileWriterException(file);
 680            }
 681            try {
 682                os.flush();
 683            } catch (IOException e) {
 684                throw new FileWriterException(file);
 685            }
 686        } catch (final FileNotFoundException e) {
 687            cleanup(file);
 688            throw new FileCopyException(R.string.error_file_not_found);
 689        } catch (final FileWriterException e) {
 690            cleanup(file);
 691            throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
 692        } catch (final SecurityException | IllegalStateException e) {
 693            cleanup(file);
 694            throw new FileCopyException(R.string.error_security_exception);
 695        } catch (final IOException e) {
 696            cleanup(file);
 697            throw new FileCopyException(R.string.error_io_exception);
 698        }
 699    }
 700
 701    public void copyFileToPrivateStorage(Message message, Uri uri, String type)
 702            throws FileCopyException {
 703        String mime = MimeUtils.guessMimeTypeFromUriAndMime(mXmppConnectionService, uri, type);
 704        Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage (mime=" + mime + ")");
 705        String extension = MimeUtils.guessExtensionFromMimeType(mime);
 706        if (extension == null) {
 707            Log.d(Config.LOGTAG, "extension from mime type was null");
 708            extension = getExtensionFromUri(uri);
 709        }
 710        if ("ogg".equals(extension) && type != null && type.startsWith("audio/")) {
 711            extension = "oga";
 712        }
 713        setupRelativeFilePath(message, String.format("%s.%s", message.getUuid(), extension));
 714        copyFileToPrivateStorage(mXmppConnectionService.getFileBackend().getFile(message), uri);
 715    }
 716
 717    private String getExtensionFromUri(final Uri uri) {
 718        final String[] projection = {MediaStore.MediaColumns.DATA};
 719        String filename = null;
 720        try (final Cursor cursor =
 721                mXmppConnectionService
 722                        .getContentResolver()
 723                        .query(uri, projection, null, null, null)) {
 724            if (cursor != null && cursor.moveToFirst()) {
 725                filename = cursor.getString(0);
 726            }
 727        } catch (final Exception e) {
 728            filename = null;
 729        }
 730        if (filename == null) {
 731            final List<String> segments = uri.getPathSegments();
 732            if (segments.size() > 0) {
 733                filename = segments.get(segments.size() - 1);
 734            }
 735        }
 736        final int pos = filename == null ? -1 : filename.lastIndexOf('.');
 737        return pos > 0 ? filename.substring(pos + 1) : null;
 738    }
 739
 740    private void copyImageToPrivateStorage(File file, Uri image, int sampleSize)
 741            throws FileCopyException, ImageCompressionException {
 742        final File parent = file.getParentFile();
 743        if (parent != null && parent.mkdirs()) {
 744            Log.d(Config.LOGTAG, "created parent directory");
 745        }
 746        InputStream is = null;
 747        OutputStream os = null;
 748        try {
 749            if (!file.exists() && !file.createNewFile()) {
 750                throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
 751            }
 752            is = mXmppConnectionService.getContentResolver().openInputStream(image);
 753            if (is == null) {
 754                throw new FileCopyException(R.string.error_not_an_image_file);
 755            }
 756            final Bitmap originalBitmap;
 757            final BitmapFactory.Options options = new BitmapFactory.Options();
 758            final int inSampleSize = (int) Math.pow(2, sampleSize);
 759            Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
 760            options.inSampleSize = inSampleSize;
 761            originalBitmap = BitmapFactory.decodeStream(is, null, options);
 762            is.close();
 763            if (originalBitmap == null) {
 764                throw new ImageCompressionException("Source file was not an image");
 765            }
 766            if (!"image/jpeg".equals(options.outMimeType) && hasAlpha(originalBitmap)) {
 767                originalBitmap.recycle();
 768                throw new ImageCompressionException("Source file had alpha channel");
 769            }
 770            Bitmap scaledBitmap = resize(originalBitmap, Config.IMAGE_SIZE);
 771            final int rotation = getRotation(image);
 772            scaledBitmap = rotate(scaledBitmap, rotation);
 773            boolean targetSizeReached = false;
 774            int quality = Config.IMAGE_QUALITY;
 775            final int imageMaxSize =
 776                    mXmppConnectionService
 777                            .getResources()
 778                            .getInteger(R.integer.auto_accept_filesize);
 779            while (!targetSizeReached) {
 780                os = new FileOutputStream(file);
 781                Log.d(Config.LOGTAG, "compressing image with quality " + quality);
 782                boolean success = scaledBitmap.compress(Config.IMAGE_FORMAT, quality, os);
 783                if (!success) {
 784                    throw new FileCopyException(R.string.error_compressing_image);
 785                }
 786                os.flush();
 787                final long fileSize = file.length();
 788                Log.d(Config.LOGTAG, "achieved file size of " + fileSize);
 789                targetSizeReached = fileSize <= imageMaxSize || quality <= 50;
 790                quality -= 5;
 791            }
 792            scaledBitmap.recycle();
 793        } catch (final FileNotFoundException e) {
 794            cleanup(file);
 795            throw new FileCopyException(R.string.error_file_not_found);
 796        } catch (final IOException e) {
 797            cleanup(file);
 798            throw new FileCopyException(R.string.error_io_exception);
 799        } catch (SecurityException e) {
 800            cleanup(file);
 801            throw new FileCopyException(R.string.error_security_exception_during_image_copy);
 802        } catch (final OutOfMemoryError e) {
 803            ++sampleSize;
 804            if (sampleSize <= 3) {
 805                copyImageToPrivateStorage(file, image, sampleSize);
 806            } else {
 807                throw new FileCopyException(R.string.error_out_of_memory);
 808            }
 809        } finally {
 810            close(os);
 811            close(is);
 812        }
 813    }
 814
 815    private static void cleanup(final File file) {
 816        try {
 817            file.delete();
 818        } catch (Exception e) {
 819
 820        }
 821    }
 822
 823    public void copyImageToPrivateStorage(File file, Uri image)
 824            throws FileCopyException, ImageCompressionException {
 825        Log.d(
 826                Config.LOGTAG,
 827                "copy image ("
 828                        + image.toString()
 829                        + ") to private storage "
 830                        + file.getAbsolutePath());
 831        copyImageToPrivateStorage(file, image, 0);
 832    }
 833
 834    public void copyImageToPrivateStorage(Message message, Uri image)
 835            throws FileCopyException, ImageCompressionException {
 836        final String filename;
 837        switch (Config.IMAGE_FORMAT) {
 838            case JPEG:
 839                filename = String.format("%s.%s", message.getUuid(), "jpg");
 840                break;
 841            case PNG:
 842                filename = String.format("%s.%s", message.getUuid(), "png");
 843                break;
 844            case WEBP:
 845                filename = String.format("%s.%s", message.getUuid(), "webp");
 846                break;
 847            default:
 848                throw new IllegalStateException("Unknown image format");
 849        }
 850        setupRelativeFilePath(message, filename);
 851        copyImageToPrivateStorage(getFile(message), image);
 852        updateFileParams(message);
 853    }
 854
 855    public void setupRelativeFilePath(final Message message, final String filename) {
 856        final String extension = MimeUtils.extractRelevantExtension(filename);
 857        final String mime = MimeUtils.guessMimeTypeFromExtension(extension);
 858        setupRelativeFilePath(message, filename, mime);
 859    }
 860
 861    public File getStorageLocation(final String filename, final String mime) {
 862        final File parentDirectory;
 863        if (Strings.isNullOrEmpty(mime)) {
 864            parentDirectory =
 865                    Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
 866        } else if (mime.startsWith("image/")) {
 867            parentDirectory =
 868                    Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
 869        } else if (mime.startsWith("video/")) {
 870            parentDirectory =
 871                    Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES);
 872        } else if (MediaAdapter.DOCUMENT_MIMES.contains(mime)) {
 873            parentDirectory =
 874                    Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS);
 875        } else {
 876            parentDirectory =
 877                    Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
 878        }
 879        final File appDirectory =
 880                new File(parentDirectory, mXmppConnectionService.getString(R.string.app_name));
 881        return new File(appDirectory, filename);
 882    }
 883
 884    public static boolean inConversationsDirectory(final Context context, String path) {
 885        final File fileDirectory = new File(path).getParentFile();
 886        for (final String type : STORAGE_TYPES) {
 887            final File typeDirectory =
 888                    new File(
 889                            Environment.getExternalStoragePublicDirectory(type),
 890                            context.getString(R.string.app_name));
 891            if (typeDirectory.equals(fileDirectory)) {
 892                return true;
 893            }
 894        }
 895        return false;
 896    }
 897
 898    public void setupRelativeFilePath(
 899            final Message message, final String filename, final String mime) {
 900        final File file = getStorageLocation(filename, mime);
 901        message.setRelativeFilePath(file.getAbsolutePath());
 902    }
 903
 904    public boolean unusualBounds(final Uri image) {
 905        try {
 906            final BitmapFactory.Options options = new BitmapFactory.Options();
 907            options.inJustDecodeBounds = true;
 908            final InputStream inputStream =
 909                    mXmppConnectionService.getContentResolver().openInputStream(image);
 910            BitmapFactory.decodeStream(inputStream, null, options);
 911            close(inputStream);
 912            float ratio = (float) options.outHeight / options.outWidth;
 913            return ratio > (21.0f / 9.0f) || ratio < (9.0f / 21.0f);
 914        } catch (final Exception e) {
 915            Log.w(Config.LOGTAG, "unable to detect image bounds", e);
 916            return false;
 917        }
 918    }
 919
 920    private int getRotation(final File file) {
 921        try (final InputStream inputStream = new FileInputStream(file)) {
 922            return getRotation(inputStream);
 923        } catch (Exception e) {
 924            return 0;
 925        }
 926    }
 927
 928    private int getRotation(final Uri image) {
 929        try (final InputStream is =
 930                mXmppConnectionService.getContentResolver().openInputStream(image)) {
 931            return is == null ? 0 : getRotation(is);
 932        } catch (final Exception e) {
 933            return 0;
 934        }
 935    }
 936
 937    private static int getRotation(final InputStream inputStream) throws IOException {
 938        final ExifInterface exif = new ExifInterface(inputStream);
 939        final int orientation =
 940                exif.getAttributeInt(
 941                        ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_UNDEFINED);
 942        switch (orientation) {
 943            case ExifInterface.ORIENTATION_ROTATE_180:
 944                return 180;
 945            case ExifInterface.ORIENTATION_ROTATE_90:
 946                return 90;
 947            case ExifInterface.ORIENTATION_ROTATE_270:
 948                return 270;
 949            default:
 950                return 0;
 951        }
 952    }
 953
 954    public Bitmap getThumbnail(Message message, int size, boolean cacheOnly) throws IOException {
 955        final String uuid = message.getUuid();
 956        final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
 957        Bitmap thumbnail = cache.get(uuid);
 958        if ((thumbnail == null) && (!cacheOnly)) {
 959            synchronized (THUMBNAIL_LOCK) {
 960                thumbnail = cache.get(uuid);
 961                if (thumbnail != null) {
 962                    return thumbnail;
 963                }
 964                DownloadableFile file = getFile(message);
 965                final String mime = file.getMimeType();
 966                if ("application/pdf".equals(mime)) {
 967                    thumbnail = getPdfDocumentPreview(file, size);
 968                } else if (mime.startsWith("video/")) {
 969                    thumbnail = getVideoPreview(file, size);
 970                } else {
 971                    final Bitmap fullSize = getFullSizeImagePreview(file, size);
 972                    if (fullSize == null) {
 973                        throw new FileNotFoundException();
 974                    }
 975                    thumbnail = resize(fullSize, size);
 976                    thumbnail = rotate(thumbnail, getRotation(file));
 977                    if (mime.equals("image/gif")) {
 978                        Bitmap withGifOverlay = thumbnail.copy(Bitmap.Config.ARGB_8888, true);
 979                        drawOverlay(
 980                                withGifOverlay,
 981                                paintOverlayBlack(withGifOverlay)
 982                                        ? R.drawable.play_gif_black
 983                                        : R.drawable.play_gif_white,
 984                                1.0f);
 985                        thumbnail.recycle();
 986                        thumbnail = withGifOverlay;
 987                    }
 988                }
 989                cache.put(uuid, thumbnail);
 990            }
 991        }
 992        return thumbnail;
 993    }
 994
 995    private Bitmap getFullSizeImagePreview(File file, int size) {
 996        BitmapFactory.Options options = new BitmapFactory.Options();
 997        options.inSampleSize = calcSampleSize(file, size);
 998        try {
 999            return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1000        } catch (OutOfMemoryError e) {
1001            options.inSampleSize *= 2;
1002            return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1003        }
1004    }
1005
1006    private void drawOverlay(Bitmap bitmap, int resource, float factor) {
1007        Bitmap overlay =
1008                BitmapFactory.decodeResource(mXmppConnectionService.getResources(), resource);
1009        Canvas canvas = new Canvas(bitmap);
1010        float targetSize = Math.min(canvas.getWidth(), canvas.getHeight()) * factor;
1011        Log.d(
1012                Config.LOGTAG,
1013                "target size overlay: "
1014                        + targetSize
1015                        + " overlay bitmap size was "
1016                        + overlay.getHeight());
1017        float left = (canvas.getWidth() - targetSize) / 2.0f;
1018        float top = (canvas.getHeight() - targetSize) / 2.0f;
1019        RectF dst = new RectF(left, top, left + targetSize - 1, top + targetSize - 1);
1020        canvas.drawBitmap(overlay, null, dst, createAntiAliasingPaint());
1021    }
1022
1023    /** https://stackoverflow.com/a/3943023/210897 */
1024    private boolean paintOverlayBlack(final Bitmap bitmap) {
1025        final int h = bitmap.getHeight();
1026        final int w = bitmap.getWidth();
1027        int record = 0;
1028        for (int y = Math.round(h * IGNORE_PADDING); y < h - Math.round(h * IGNORE_PADDING); ++y) {
1029            for (int x = Math.round(w * IGNORE_PADDING);
1030                    x < w - Math.round(w * IGNORE_PADDING);
1031                    ++x) {
1032                int pixel = bitmap.getPixel(x, y);
1033                if ((Color.red(pixel) * 0.299
1034                                + Color.green(pixel) * 0.587
1035                                + Color.blue(pixel) * 0.114)
1036                        > 186) {
1037                    --record;
1038                } else {
1039                    ++record;
1040                }
1041            }
1042        }
1043        return record < 0;
1044    }
1045
1046    private boolean paintOverlayBlackPdf(final Bitmap bitmap) {
1047        final int h = bitmap.getHeight();
1048        final int w = bitmap.getWidth();
1049        int white = 0;
1050        for (int y = 0; y < h; ++y) {
1051            for (int x = 0; x < w; ++x) {
1052                int pixel = bitmap.getPixel(x, y);
1053                if ((Color.red(pixel) * 0.299
1054                                + Color.green(pixel) * 0.587
1055                                + Color.blue(pixel) * 0.114)
1056                        > 186) {
1057                    white++;
1058                }
1059            }
1060        }
1061        return white > (h * w * 0.4f);
1062    }
1063
1064    private Bitmap cropCenterSquareVideo(Uri uri, int size) {
1065        MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
1066        Bitmap frame;
1067        try {
1068            metadataRetriever.setDataSource(mXmppConnectionService, uri);
1069            frame = metadataRetriever.getFrameAtTime(0);
1070            metadataRetriever.release();
1071            return cropCenterSquare(frame, size);
1072        } catch (Exception e) {
1073            frame = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
1074            frame.eraseColor(0xff000000);
1075            return frame;
1076        }
1077    }
1078
1079    private Bitmap getVideoPreview(final File file, final int size) {
1080        final MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
1081        Bitmap frame;
1082        try {
1083            metadataRetriever.setDataSource(file.getAbsolutePath());
1084            frame = metadataRetriever.getFrameAtTime(0);
1085            metadataRetriever.release();
1086            frame = resize(frame, size);
1087        } catch (IOException | RuntimeException e) {
1088            frame = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
1089            frame.eraseColor(0xff000000);
1090        }
1091        drawOverlay(
1092                frame,
1093                paintOverlayBlack(frame)
1094                        ? R.drawable.play_video_black
1095                        : R.drawable.play_video_white,
1096                0.75f);
1097        return frame;
1098    }
1099
1100    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
1101    private Bitmap getPdfDocumentPreview(final File file, final int size) {
1102        try {
1103            final ParcelFileDescriptor fileDescriptor =
1104                    ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
1105            final Bitmap rendered = renderPdfDocument(fileDescriptor, size, true);
1106            drawOverlay(
1107                    rendered,
1108                    paintOverlayBlackPdf(rendered)
1109                            ? R.drawable.open_pdf_black
1110                            : R.drawable.open_pdf_white,
1111                    0.75f);
1112            return rendered;
1113        } catch (final IOException | SecurityException e) {
1114            Log.d(Config.LOGTAG, "unable to render PDF document preview", e);
1115            final Bitmap placeholder = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
1116            placeholder.eraseColor(0xff000000);
1117            return placeholder;
1118        }
1119    }
1120
1121    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
1122    private Bitmap cropCenterSquarePdf(final Uri uri, final int size) {
1123        try {
1124            ParcelFileDescriptor fileDescriptor =
1125                    mXmppConnectionService.getContentResolver().openFileDescriptor(uri, "r");
1126            final Bitmap bitmap = renderPdfDocument(fileDescriptor, size, false);
1127            return cropCenterSquare(bitmap, size);
1128        } catch (Exception e) {
1129            final Bitmap placeholder = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
1130            placeholder.eraseColor(0xff000000);
1131            return placeholder;
1132        }
1133    }
1134
1135    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
1136    private Bitmap renderPdfDocument(
1137            ParcelFileDescriptor fileDescriptor, int targetSize, boolean fit) throws IOException {
1138        final PdfRenderer pdfRenderer = new PdfRenderer(fileDescriptor);
1139        final PdfRenderer.Page page = pdfRenderer.openPage(0);
1140        final Dimensions dimensions =
1141                scalePdfDimensions(
1142                        new Dimensions(page.getHeight(), page.getWidth()), targetSize, fit);
1143        final Bitmap rendered =
1144                Bitmap.createBitmap(dimensions.width, dimensions.height, Bitmap.Config.ARGB_8888);
1145        rendered.eraseColor(0xffffffff);
1146        page.render(rendered, null, null, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);
1147        page.close();
1148        pdfRenderer.close();
1149        fileDescriptor.close();
1150        return rendered;
1151    }
1152
1153    public Uri getTakePhotoUri() {
1154        final String filename =
1155                String.format("IMG_%s.%s", IMAGE_DATE_FORMAT.format(new Date()), "jpg");
1156        final File directory;
1157        if (Config.ONLY_INTERNAL_STORAGE) {
1158            directory = new File(mXmppConnectionService.getCacheDir(), "Camera");
1159        } else {
1160            directory =
1161                    new File(
1162                            Environment.getExternalStoragePublicDirectory(
1163                                    Environment.DIRECTORY_DCIM),
1164                            "Camera");
1165        }
1166        final File file = new File(directory, filename);
1167        file.getParentFile().mkdirs();
1168        return getUriForFile(mXmppConnectionService, file);
1169    }
1170
1171    public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
1172
1173        final Avatar uncompressAvatar = getUncompressedAvatar(image);
1174        if (uncompressAvatar != null
1175                && uncompressAvatar.image.length() <= Config.AVATAR_CHAR_LIMIT) {
1176            return uncompressAvatar;
1177        }
1178        if (uncompressAvatar != null) {
1179            Log.d(
1180                    Config.LOGTAG,
1181                    "uncompressed avatar exceeded char limit by "
1182                            + (uncompressAvatar.image.length() - Config.AVATAR_CHAR_LIMIT));
1183        }
1184
1185        Bitmap bm = cropCenterSquare(image, size);
1186        if (bm == null) {
1187            return null;
1188        }
1189        if (hasAlpha(bm)) {
1190            Log.d(Config.LOGTAG, "alpha in avatar detected; uploading as PNG");
1191            bm.recycle();
1192            bm = cropCenterSquare(image, 96);
1193            return getPepAvatar(bm, Bitmap.CompressFormat.PNG, 100);
1194        }
1195        return getPepAvatar(bm, format, 100);
1196    }
1197
1198    private Avatar getUncompressedAvatar(Uri uri) {
1199        Bitmap bitmap = null;
1200        try {
1201            bitmap =
1202                    BitmapFactory.decodeStream(
1203                            mXmppConnectionService.getContentResolver().openInputStream(uri));
1204            return getPepAvatar(bitmap, Bitmap.CompressFormat.PNG, 100);
1205        } catch (Exception e) {
1206            return null;
1207        } finally {
1208            if (bitmap != null) {
1209                bitmap.recycle();
1210            }
1211        }
1212    }
1213
1214    private Avatar getPepAvatar(Bitmap bitmap, Bitmap.CompressFormat format, int quality) {
1215        try {
1216            ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
1217            Base64OutputStream mBase64OutputStream =
1218                    new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
1219            MessageDigest digest = MessageDigest.getInstance("SHA-1");
1220            DigestOutputStream mDigestOutputStream =
1221                    new DigestOutputStream(mBase64OutputStream, digest);
1222            if (!bitmap.compress(format, quality, mDigestOutputStream)) {
1223                return null;
1224            }
1225            mDigestOutputStream.flush();
1226            mDigestOutputStream.close();
1227            long chars = mByteArrayOutputStream.size();
1228            if (format != Bitmap.CompressFormat.PNG
1229                    && quality >= 50
1230                    && chars >= Config.AVATAR_CHAR_LIMIT) {
1231                int q = quality - 2;
1232                Log.d(
1233                        Config.LOGTAG,
1234                        "avatar char length was " + chars + " reducing quality to " + q);
1235                return getPepAvatar(bitmap, format, q);
1236            }
1237            Log.d(Config.LOGTAG, "settled on char length " + chars + " with quality=" + quality);
1238            final Avatar avatar = new Avatar();
1239            avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
1240            avatar.image = new String(mByteArrayOutputStream.toByteArray());
1241            if (format.equals(Bitmap.CompressFormat.WEBP)) {
1242                avatar.type = "image/webp";
1243            } else if (format.equals(Bitmap.CompressFormat.JPEG)) {
1244                avatar.type = "image/jpeg";
1245            } else if (format.equals(Bitmap.CompressFormat.PNG)) {
1246                avatar.type = "image/png";
1247            }
1248            avatar.width = bitmap.getWidth();
1249            avatar.height = bitmap.getHeight();
1250            return avatar;
1251        } catch (OutOfMemoryError e) {
1252            Log.d(Config.LOGTAG, "unable to convert avatar to base64 due to low memory");
1253            return null;
1254        } catch (Exception e) {
1255            return null;
1256        }
1257    }
1258
1259    public Avatar getStoredPepAvatar(String hash) {
1260        if (hash == null) {
1261            return null;
1262        }
1263        Avatar avatar = new Avatar();
1264        final File file = getAvatarFile(hash);
1265        FileInputStream is = null;
1266        try {
1267            avatar.size = file.length();
1268            BitmapFactory.Options options = new BitmapFactory.Options();
1269            options.inJustDecodeBounds = true;
1270            BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1271            is = new FileInputStream(file);
1272            ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
1273            Base64OutputStream mBase64OutputStream =
1274                    new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
1275            MessageDigest digest = MessageDigest.getInstance("SHA-1");
1276            DigestOutputStream os = new DigestOutputStream(mBase64OutputStream, digest);
1277            byte[] buffer = new byte[4096];
1278            int length;
1279            while ((length = is.read(buffer)) > 0) {
1280                os.write(buffer, 0, length);
1281            }
1282            os.flush();
1283            os.close();
1284            avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
1285            avatar.image = new String(mByteArrayOutputStream.toByteArray());
1286            avatar.height = options.outHeight;
1287            avatar.width = options.outWidth;
1288            avatar.type = options.outMimeType;
1289            return avatar;
1290        } catch (NoSuchAlgorithmException | IOException e) {
1291            return null;
1292        } finally {
1293            close(is);
1294        }
1295    }
1296
1297    public boolean isAvatarCached(Avatar avatar) {
1298        final File file = getAvatarFile(avatar.getFilename());
1299        return file.exists();
1300    }
1301
1302    public boolean save(final Avatar avatar) {
1303        File file;
1304        if (isAvatarCached(avatar)) {
1305            file = getAvatarFile(avatar.getFilename());
1306            avatar.size = file.length();
1307        } else {
1308            file =
1309                    new File(
1310                            mXmppConnectionService.getCacheDir().getAbsolutePath()
1311                                    + "/"
1312                                    + UUID.randomUUID().toString());
1313            if (file.getParentFile().mkdirs()) {
1314                Log.d(Config.LOGTAG, "created cache directory");
1315            }
1316            OutputStream os = null;
1317            try {
1318                if (!file.createNewFile()) {
1319                    Log.d(
1320                            Config.LOGTAG,
1321                            "unable to create temporary file " + file.getAbsolutePath());
1322                }
1323                os = new FileOutputStream(file);
1324                MessageDigest digest = MessageDigest.getInstance("SHA-1");
1325                digest.reset();
1326                DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
1327                final byte[] bytes = avatar.getImageAsBytes();
1328                mDigestOutputStream.write(bytes);
1329                mDigestOutputStream.flush();
1330                mDigestOutputStream.close();
1331                String sha1sum = CryptoHelper.bytesToHex(digest.digest());
1332                if (sha1sum.equals(avatar.sha1sum)) {
1333                    final File outputFile = getAvatarFile(avatar.getFilename());
1334                    if (outputFile.getParentFile().mkdirs()) {
1335                        Log.d(Config.LOGTAG, "created avatar directory");
1336                    }
1337                    final File avatarFile = getAvatarFile(avatar.getFilename());
1338                    if (!file.renameTo(avatarFile)) {
1339                        Log.d(
1340                                Config.LOGTAG,
1341                                "unable to rename " + file.getAbsolutePath() + " to " + outputFile);
1342                        return false;
1343                    }
1344                } else {
1345                    Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
1346                    if (!file.delete()) {
1347                        Log.d(Config.LOGTAG, "unable to delete temporary file");
1348                    }
1349                    return false;
1350                }
1351                avatar.size = bytes.length;
1352            } catch (IllegalArgumentException | IOException | NoSuchAlgorithmException e) {
1353                return false;
1354            } finally {
1355                close(os);
1356            }
1357        }
1358        return true;
1359    }
1360
1361    public void deleteHistoricAvatarPath() {
1362        delete(getHistoricAvatarPath());
1363    }
1364
1365    private void delete(final File file) {
1366        if (file.isDirectory()) {
1367            final File[] files = file.listFiles();
1368            if (files != null) {
1369                for (final File f : files) {
1370                    delete(f);
1371                }
1372            }
1373        }
1374        if (file.delete()) {
1375            Log.d(Config.LOGTAG, "deleted " + file.getAbsolutePath());
1376        }
1377    }
1378
1379    private File getHistoricAvatarPath() {
1380        return new File(mXmppConnectionService.getFilesDir(), "/avatars/");
1381    }
1382
1383    private File getAvatarFile(String avatar) {
1384        return new File(mXmppConnectionService.getCacheDir(), "/avatars/" + avatar);
1385    }
1386
1387    public Uri getAvatarUri(String avatar) {
1388        return Uri.fromFile(getAvatarFile(avatar));
1389    }
1390
1391    public Bitmap cropCenterSquare(Uri image, int size) {
1392        if (image == null) {
1393            return null;
1394        }
1395        InputStream is = null;
1396        try {
1397            BitmapFactory.Options options = new BitmapFactory.Options();
1398            options.inSampleSize = calcSampleSize(image, size);
1399            is = mXmppConnectionService.getContentResolver().openInputStream(image);
1400            if (is == null) {
1401                return null;
1402            }
1403            Bitmap input = BitmapFactory.decodeStream(is, null, options);
1404            if (input == null) {
1405                return null;
1406            } else {
1407                input = rotate(input, getRotation(image));
1408                return cropCenterSquare(input, size);
1409            }
1410        } catch (FileNotFoundException | SecurityException e) {
1411            Log.d(Config.LOGTAG, "unable to open file " + image.toString(), e);
1412            return null;
1413        } finally {
1414            close(is);
1415        }
1416    }
1417
1418    public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
1419        if (image == null) {
1420            return null;
1421        }
1422        InputStream is = null;
1423        try {
1424            BitmapFactory.Options options = new BitmapFactory.Options();
1425            options.inSampleSize = calcSampleSize(image, Math.max(newHeight, newWidth));
1426            is = mXmppConnectionService.getContentResolver().openInputStream(image);
1427            if (is == null) {
1428                return null;
1429            }
1430            Bitmap source = BitmapFactory.decodeStream(is, null, options);
1431            if (source == null) {
1432                return null;
1433            }
1434            int sourceWidth = source.getWidth();
1435            int sourceHeight = source.getHeight();
1436            float xScale = (float) newWidth / sourceWidth;
1437            float yScale = (float) newHeight / sourceHeight;
1438            float scale = Math.max(xScale, yScale);
1439            float scaledWidth = scale * sourceWidth;
1440            float scaledHeight = scale * sourceHeight;
1441            float left = (newWidth - scaledWidth) / 2;
1442            float top = (newHeight - scaledHeight) / 2;
1443
1444            RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
1445            Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
1446            Canvas canvas = new Canvas(dest);
1447            canvas.drawBitmap(source, null, targetRect, createAntiAliasingPaint());
1448            if (source.isRecycled()) {
1449                source.recycle();
1450            }
1451            return dest;
1452        } catch (SecurityException e) {
1453            return null; // android 6.0 with revoked permissions for example
1454        } catch (FileNotFoundException e) {
1455            return null;
1456        } finally {
1457            close(is);
1458        }
1459    }
1460
1461    public Bitmap cropCenterSquare(Bitmap input, int size) {
1462        int w = input.getWidth();
1463        int h = input.getHeight();
1464
1465        float scale = Math.max((float) size / h, (float) size / w);
1466
1467        float outWidth = scale * w;
1468        float outHeight = scale * h;
1469        float left = (size - outWidth) / 2;
1470        float top = (size - outHeight) / 2;
1471        RectF target = new RectF(left, top, left + outWidth, top + outHeight);
1472
1473        Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
1474        Canvas canvas = new Canvas(output);
1475        canvas.drawBitmap(input, null, target, createAntiAliasingPaint());
1476        if (!input.isRecycled()) {
1477            input.recycle();
1478        }
1479        return output;
1480    }
1481
1482    private int calcSampleSize(Uri image, int size)
1483            throws FileNotFoundException, SecurityException {
1484        final BitmapFactory.Options options = new BitmapFactory.Options();
1485        options.inJustDecodeBounds = true;
1486        final InputStream inputStream =
1487                mXmppConnectionService.getContentResolver().openInputStream(image);
1488        BitmapFactory.decodeStream(inputStream, null, options);
1489        close(inputStream);
1490        return calcSampleSize(options, size);
1491    }
1492
1493    public void updateFileParams(Message message) {
1494        updateFileParams(message, null);
1495    }
1496
1497    public void updateFileParams(final Message message, final String url) {
1498        final boolean encrypted =
1499                message.getEncryption() == Message.ENCRYPTION_PGP
1500                        || message.getEncryption() == Message.ENCRYPTION_DECRYPTED;
1501        final DownloadableFile file = getFile(message);
1502        final String mime = file.getMimeType();
1503        final boolean image =
1504                message.getType() == Message.TYPE_IMAGE
1505                        || (mime != null && mime.startsWith("image/"));
1506        final boolean privateMessage = message.isPrivateMessage();
1507        final StringBuilder body = new StringBuilder();
1508        if (url != null) {
1509            body.append(url);
1510        }
1511        if (encrypted && !file.exists()) {
1512            Log.d(Config.LOGTAG, "skipping updateFileParams because file is encrypted");
1513            final DownloadableFile encryptedFile = getFile(message, false);
1514            body.append('|').append(encryptedFile.getSize());
1515        } else {
1516            Log.d(Config.LOGTAG, "running updateFileParams");
1517            final boolean ambiguous = MimeUtils.AMBIGUOUS_CONTAINER_FORMATS.contains(mime);
1518            final boolean video = mime != null && mime.startsWith("video/");
1519            final boolean audio = mime != null && mime.startsWith("audio/");
1520            final boolean pdf = "application/pdf".equals(mime);
1521            body.append('|').append(file.getSize());
1522            if (ambiguous) {
1523                try {
1524                    final Dimensions dimensions = getVideoDimensions(file);
1525                    if (dimensions.valid()) {
1526                        Log.d(Config.LOGTAG, "ambiguous file " + mime + " is video");
1527                        body.append('|')
1528                                .append(dimensions.width)
1529                                .append('|')
1530                                .append(dimensions.height);
1531                    } else {
1532                        Log.d(Config.LOGTAG, "ambiguous file " + mime + " is audio");
1533                        body.append("|0|0|").append(getMediaRuntime(file));
1534                    }
1535                } catch (final IOException | NotAVideoFile e) {
1536                    Log.d(Config.LOGTAG, "ambiguous file " + mime + " is audio");
1537                    body.append("|0|0|").append(getMediaRuntime(file));
1538                }
1539            } else if (image || video || pdf) {
1540                try {
1541                    final Dimensions dimensions;
1542                    if (video) {
1543                        dimensions = getVideoDimensions(file);
1544                    } else if (pdf) {
1545                        dimensions = getPdfDocumentDimensions(file);
1546                    } else {
1547                        dimensions = getImageDimensions(file);
1548                    }
1549                    if (dimensions.valid()) {
1550                        body.append('|')
1551                                .append(dimensions.width)
1552                                .append('|')
1553                                .append(dimensions.height);
1554                    }
1555                } catch (final IOException | NotAVideoFile notAVideoFile) {
1556                    Log.d(
1557                            Config.LOGTAG,
1558                            "file with mime type " + file.getMimeType() + " was not a video file");
1559                    // fall threw
1560                }
1561            } else if (audio) {
1562                body.append("|0|0|").append(getMediaRuntime(file));
1563            }
1564        }
1565        message.setBody(body.toString());
1566        message.setDeleted(false);
1567        message.setType(
1568                privateMessage
1569                        ? Message.TYPE_PRIVATE_FILE
1570                        : (image ? Message.TYPE_IMAGE : Message.TYPE_FILE));
1571    }
1572
1573    private int getMediaRuntime(final File file) {
1574        try {
1575            final MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
1576            mediaMetadataRetriever.setDataSource(file.toString());
1577            final String value =
1578                    mediaMetadataRetriever.extractMetadata(
1579                            MediaMetadataRetriever.METADATA_KEY_DURATION);
1580            if (Strings.isNullOrEmpty(value)) {
1581                return 0;
1582            }
1583            return Integer.parseInt(value);
1584        } catch (final Exception e) {
1585            return 0;
1586        }
1587    }
1588
1589    private Dimensions getImageDimensions(File file) {
1590        final BitmapFactory.Options options = new BitmapFactory.Options();
1591        options.inJustDecodeBounds = true;
1592        BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1593        final int rotation = getRotation(file);
1594        final boolean rotated = rotation == 90 || rotation == 270;
1595        final int imageHeight = rotated ? options.outWidth : options.outHeight;
1596        final int imageWidth = rotated ? options.outHeight : options.outWidth;
1597        return new Dimensions(imageHeight, imageWidth);
1598    }
1599
1600    private Dimensions getVideoDimensions(final File file) throws NotAVideoFile, IOException {
1601        MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
1602        try {
1603            metadataRetriever.setDataSource(file.getAbsolutePath());
1604        } catch (RuntimeException e) {
1605            throw new NotAVideoFile(e);
1606        }
1607        return getVideoDimensions(metadataRetriever);
1608    }
1609
1610    private Dimensions getPdfDocumentDimensions(final File file) {
1611        final ParcelFileDescriptor fileDescriptor;
1612        try {
1613            fileDescriptor = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
1614            if (fileDescriptor == null) {
1615                return new Dimensions(0, 0);
1616            }
1617        } catch (final FileNotFoundException e) {
1618            return new Dimensions(0, 0);
1619        }
1620        try {
1621            final PdfRenderer pdfRenderer = new PdfRenderer(fileDescriptor);
1622            final PdfRenderer.Page page = pdfRenderer.openPage(0);
1623            final int height = page.getHeight();
1624            final int width = page.getWidth();
1625            page.close();
1626            pdfRenderer.close();
1627            return scalePdfDimensions(new Dimensions(height, width));
1628        } catch (final IOException | SecurityException e) {
1629            Log.d(Config.LOGTAG, "unable to get dimensions for pdf document", e);
1630            return new Dimensions(0, 0);
1631        }
1632    }
1633
1634    private Dimensions scalePdfDimensions(Dimensions in) {
1635        final DisplayMetrics displayMetrics =
1636                mXmppConnectionService.getResources().getDisplayMetrics();
1637        final int target = (int) (displayMetrics.density * 288);
1638        return scalePdfDimensions(in, target, true);
1639    }
1640
1641    private static Dimensions scalePdfDimensions(
1642            final Dimensions in, final int target, final boolean fit) {
1643        final int w, h;
1644        if (fit == (in.width <= in.height)) {
1645            w = Math.max((int) (in.width / ((double) in.height / target)), 1);
1646            h = target;
1647        } else {
1648            w = target;
1649            h = Math.max((int) (in.height / ((double) in.width / target)), 1);
1650        }
1651        return new Dimensions(h, w);
1652    }
1653
1654    public Bitmap getAvatar(String avatar, int size) {
1655        if (avatar == null) {
1656            return null;
1657        }
1658        Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
1659        return bm;
1660    }
1661
1662    private static class Dimensions {
1663        public final int width;
1664        public final int height;
1665
1666        Dimensions(int height, int width) {
1667            this.width = width;
1668            this.height = height;
1669        }
1670
1671        public int getMin() {
1672            return Math.min(width, height);
1673        }
1674
1675        public boolean valid() {
1676            return width > 0 && height > 0;
1677        }
1678    }
1679
1680    private static class NotAVideoFile extends Exception {
1681        public NotAVideoFile(Throwable t) {
1682            super(t);
1683        }
1684
1685        public NotAVideoFile() {
1686            super();
1687        }
1688    }
1689
1690    public static class ImageCompressionException extends Exception {
1691
1692        ImageCompressionException(String message) {
1693            super(message);
1694        }
1695    }
1696
1697    public static class FileCopyException extends Exception {
1698        private final int resId;
1699
1700        private FileCopyException(@StringRes int resId) {
1701            this.resId = resId;
1702        }
1703
1704        public @StringRes int getResId() {
1705            return resId;
1706        }
1707    }
1708}