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.annotation.RequiresApi;
  23import android.support.v4.content.FileProvider;
  24import android.system.Os;
  25import android.system.StructStat;
  26import android.util.Base64;
  27import android.util.Base64OutputStream;
  28import android.util.Log;
  29import android.util.LruCache;
  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.ArrayList;
  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.ui.util.Attachment;
  60import eu.siacs.conversations.utils.CryptoHelper;
  61import eu.siacs.conversations.utils.ExifHelper;
  62import eu.siacs.conversations.utils.FileUtils;
  63import eu.siacs.conversations.utils.FileWriterException;
  64import eu.siacs.conversations.utils.MimeUtils;
  65import eu.siacs.conversations.xmpp.pep.Avatar;
  66
  67public class FileBackend {
  68
  69    private static final Object THUMBNAIL_LOCK = new Object();
  70
  71    private static final SimpleDateFormat IMAGE_DATE_FORMAT = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US);
  72
  73    private static final String FILE_PROVIDER = ".files";
  74
  75    private XmppConnectionService mXmppConnectionService;
  76
  77    private static final float IGNORE_PADDING = 0.15f;
  78
  79    public FileBackend(XmppConnectionService service) {
  80        this.mXmppConnectionService = service;
  81    }
  82
  83    private static boolean isInDirectoryThatShouldNotBeScanned(Context context, File file) {
  84        return isInDirectoryThatShouldNotBeScanned(context, file.getAbsolutePath());
  85    }
  86
  87    public static boolean isInDirectoryThatShouldNotBeScanned(Context context, String path) {
  88        for (String type : new String[]{RecordingActivity.STORAGE_DIRECTORY_TYPE_NAME, "Files"}) {
  89            if (path.startsWith(getConversationsDirectory(context, type))) {
  90                return true;
  91            }
  92        }
  93        return false;
  94    }
  95
  96    public static long getFileSize(Context context, Uri uri) {
  97        try {
  98            final Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
  99            if (cursor != null && cursor.moveToFirst()) {
 100                long size = cursor.getLong(cursor.getColumnIndex(OpenableColumns.SIZE));
 101                cursor.close();
 102                return size;
 103            } else {
 104                return -1;
 105            }
 106        } catch (Exception e) {
 107            return -1;
 108        }
 109    }
 110
 111    public static boolean allFilesUnderSize(Context context, List<Attachment> attachments, long max) {
 112        if (max <= 0) {
 113            Log.d(Config.LOGTAG, "server did not report max file size for http upload");
 114            return true; //exception to be compatible with HTTP Upload < v0.2
 115        }
 116        for (Attachment attachment : attachments) {
 117            if (attachment.getType() != Attachment.Type.FILE) {
 118                continue;
 119            }
 120            String mime = attachment.getMime();
 121            if (mime != null && mime.startsWith("video/")) {
 122                try {
 123                    Dimensions dimensions = FileBackend.getVideoDimensions(context, attachment.getUri());
 124                    if (dimensions.getMin() > 720) {
 125                        Log.d(Config.LOGTAG, "do not consider video file with min width larger than 720 for size check");
 126                        continue;
 127                    }
 128                } catch (NotAVideoFile notAVideoFile) {
 129                    //ignore and fall through
 130                }
 131            }
 132            if (FileBackend.getFileSize(context, attachment.getUri()) > max) {
 133                Log.d(Config.LOGTAG, "not all files are under " + max + " bytes. suggesting falling back to jingle");
 134                return false;
 135            }
 136        }
 137        return true;
 138    }
 139
 140    public static String getConversationsDirectory(Context context, final String type) {
 141        if (Config.ONLY_INTERNAL_STORAGE) {
 142            return context.getFilesDir().getAbsolutePath() + "/" + type + "/";
 143        } else {
 144            return getAppMediaDirectory(context) + context.getString(R.string.app_name) + " " + type + "/";
 145        }
 146    }
 147
 148    public static String getAppMediaDirectory(Context context) {
 149        return Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + context.getString(R.string.app_name) + "/Media/";
 150    }
 151
 152    public static String getConversationsLogsDirectory() {
 153        return Environment.getExternalStorageDirectory().getAbsolutePath() + "/Conversations/";
 154    }
 155
 156    private static Bitmap rotate(Bitmap bitmap, int degree) {
 157        if (degree == 0) {
 158            return bitmap;
 159        }
 160        int w = bitmap.getWidth();
 161        int h = bitmap.getHeight();
 162        Matrix mtx = new Matrix();
 163        mtx.postRotate(degree);
 164        Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
 165        if (bitmap != null && !bitmap.isRecycled()) {
 166            bitmap.recycle();
 167        }
 168        return result;
 169    }
 170
 171    public static boolean isPathBlacklisted(String path) {
 172        final String androidDataPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Android/data/";
 173        return path.startsWith(androidDataPath);
 174    }
 175
 176    private static Paint createAntiAliasingPaint() {
 177        Paint paint = new Paint();
 178        paint.setAntiAlias(true);
 179        paint.setFilterBitmap(true);
 180        paint.setDither(true);
 181        return paint;
 182    }
 183
 184    private static String getTakePhotoPath() {
 185        return Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) + "/Camera/";
 186    }
 187
 188    public static Uri getUriForFile(Context context, File file) {
 189        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N || Config.ONLY_INTERNAL_STORAGE) {
 190            try {
 191                return FileProvider.getUriForFile(context, getAuthority(context), file);
 192            } catch (IllegalArgumentException e) {
 193                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 194                    throw new SecurityException(e);
 195                } else {
 196                    return Uri.fromFile(file);
 197                }
 198            }
 199        } else {
 200            return Uri.fromFile(file);
 201        }
 202    }
 203
 204    public static String getAuthority(Context context) {
 205        return context.getPackageName() + FILE_PROVIDER;
 206    }
 207
 208    private static boolean hasAlpha(final Bitmap bitmap) {
 209        for (int x = 0; x < bitmap.getWidth(); ++x) {
 210            for (int y = 0; y < bitmap.getWidth(); ++y) {
 211                if (Color.alpha(bitmap.getPixel(x, y)) < 255) {
 212                    return true;
 213                }
 214            }
 215        }
 216        return false;
 217    }
 218
 219    private static int calcSampleSize(File image, int size) {
 220        BitmapFactory.Options options = new BitmapFactory.Options();
 221        options.inJustDecodeBounds = true;
 222        BitmapFactory.decodeFile(image.getAbsolutePath(), options);
 223        return calcSampleSize(options, size);
 224    }
 225
 226
 227    private static int calcSampleSize(BitmapFactory.Options options, int size) {
 228        int height = options.outHeight;
 229        int width = options.outWidth;
 230        int inSampleSize = 1;
 231
 232        if (height > size || width > size) {
 233            int halfHeight = height / 2;
 234            int halfWidth = width / 2;
 235
 236            while ((halfHeight / inSampleSize) > size
 237                    && (halfWidth / inSampleSize) > size) {
 238                inSampleSize *= 2;
 239            }
 240        }
 241        return inSampleSize;
 242    }
 243
 244    public Bitmap getPreviewForUri(Attachment attachment, int size, boolean cacheOnly) {
 245        final String key = "attachment_"+attachment.getUuid().toString()+"_"+String.valueOf(size);
 246        final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
 247        Bitmap bitmap = cache.get(key);
 248        if (bitmap != null || cacheOnly) {
 249            return bitmap;
 250        }
 251        if (attachment.getMime() != null && attachment.getMime().startsWith("video/")) {
 252            bitmap = cropCenterSquareVideo(attachment.getUri(), size);
 253            drawOverlay(bitmap, paintOverlayBlack(bitmap) ? R.drawable.play_video_black : R.drawable.play_video_white, 0.75f);
 254        } else {
 255            bitmap = cropCenterSquare(attachment.getUri(), size);
 256            if (bitmap != null && "image/gif".equals(attachment.getMime())) {
 257                Bitmap withGifOverlay = bitmap.copy(Bitmap.Config.ARGB_8888, true);
 258                drawOverlay(withGifOverlay, paintOverlayBlack(withGifOverlay) ? R.drawable.play_gif_black : R.drawable.play_gif_white, 1.0f);
 259                bitmap.recycle();
 260                bitmap = withGifOverlay;
 261            }
 262        }
 263        if (bitmap != null) {
 264            cache.put(key, bitmap);
 265        }
 266        return bitmap;
 267    }
 268
 269    private static Dimensions getVideoDimensions(Context context, Uri uri) throws NotAVideoFile {
 270        MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
 271        try {
 272            mediaMetadataRetriever.setDataSource(context, uri);
 273        } catch (RuntimeException e) {
 274            throw new NotAVideoFile(e);
 275        }
 276        return getVideoDimensions(mediaMetadataRetriever);
 277    }
 278
 279    private static Dimensions getVideoDimensionsOfFrame(MediaMetadataRetriever mediaMetadataRetriever) {
 280        Bitmap bitmap = null;
 281        try {
 282            bitmap = mediaMetadataRetriever.getFrameAtTime();
 283            return new Dimensions(bitmap.getHeight(), bitmap.getWidth());
 284        } catch (Exception e) {
 285            return null;
 286        } finally {
 287            if (bitmap != null) {
 288                bitmap.recycle();
 289                ;
 290            }
 291        }
 292    }
 293
 294    private static Dimensions getVideoDimensions(MediaMetadataRetriever metadataRetriever) throws NotAVideoFile {
 295        String hasVideo = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_HAS_VIDEO);
 296        if (hasVideo == null) {
 297            throw new NotAVideoFile();
 298        }
 299        Dimensions dimensions = getVideoDimensionsOfFrame(metadataRetriever);
 300        if (dimensions != null) {
 301            return dimensions;
 302        }
 303        final int rotation;
 304        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1) {
 305            rotation = extractRotationFromMediaRetriever(metadataRetriever);
 306        } else {
 307            rotation = 0;
 308        }
 309        boolean rotated = rotation == 90 || rotation == 270;
 310        int height;
 311        try {
 312            String h = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
 313            height = Integer.parseInt(h);
 314        } catch (Exception e) {
 315            height = -1;
 316        }
 317        int width;
 318        try {
 319            String w = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
 320            width = Integer.parseInt(w);
 321        } catch (Exception e) {
 322            width = -1;
 323        }
 324        metadataRetriever.release();
 325        Log.d(Config.LOGTAG, "extracted video dims " + width + "x" + height);
 326        return rotated ? new Dimensions(width, height) : new Dimensions(height, width);
 327    }
 328
 329    @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR1)
 330    private static int extractRotationFromMediaRetriever(MediaMetadataRetriever metadataRetriever) {
 331        String r = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
 332        try {
 333            return Integer.parseInt(r);
 334        } catch (Exception e) {
 335            return 0;
 336        }
 337    }
 338
 339    public static void close(Closeable stream) {
 340        if (stream != null) {
 341            try {
 342                stream.close();
 343            } catch (IOException e) {
 344            }
 345        }
 346    }
 347
 348    public static void close(Socket socket) {
 349        if (socket != null) {
 350            try {
 351                socket.close();
 352            } catch (IOException e) {
 353            }
 354        }
 355    }
 356
 357    public static boolean weOwnFile(Context context, Uri uri) {
 358        if (uri == null || !ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {
 359            return false;
 360        } else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
 361            return fileIsInFilesDir(context, uri);
 362        } else {
 363            return weOwnFileLollipop(uri);
 364        }
 365    }
 366
 367    /**
 368     * This is more than hacky but probably way better than doing nothing
 369     * Further 'optimizations' might contain to get the parents of CacheDir and NoBackupDir
 370     * and check against those as well
 371     */
 372    private static boolean fileIsInFilesDir(Context context, Uri uri) {
 373        try {
 374            final String haystack = context.getFilesDir().getParentFile().getCanonicalPath();
 375            final String needle = new File(uri.getPath()).getCanonicalPath();
 376            return needle.startsWith(haystack);
 377        } catch (IOException e) {
 378            return false;
 379        }
 380    }
 381
 382    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
 383    private static boolean weOwnFileLollipop(Uri uri) {
 384        try {
 385            File file = new File(uri.getPath());
 386            FileDescriptor fd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY).getFileDescriptor();
 387            StructStat st = Os.fstat(fd);
 388            return st.st_uid == android.os.Process.myUid();
 389        } catch (FileNotFoundException e) {
 390            return false;
 391        } catch (Exception e) {
 392            return true;
 393        }
 394    }
 395
 396    private void createNoMedia(File diretory) {
 397        final File noMedia = new File(diretory, ".nomedia");
 398        if (!noMedia.exists()) {
 399            try {
 400                if (!noMedia.createNewFile()) {
 401                    Log.d(Config.LOGTAG, "created nomedia file " + noMedia.getAbsolutePath());
 402                }
 403            } catch (Exception e) {
 404                Log.d(Config.LOGTAG, "could not create nomedia file");
 405            }
 406        }
 407    }
 408
 409    public void updateMediaScanner(File file) {
 410        if (!isInDirectoryThatShouldNotBeScanned(mXmppConnectionService, file)) {
 411            Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
 412            intent.setData(Uri.fromFile(file));
 413            mXmppConnectionService.sendBroadcast(intent);
 414        } else if (file.getAbsolutePath().startsWith(getAppMediaDirectory(mXmppConnectionService))) {
 415            createNoMedia(file.getParentFile());
 416        }
 417    }
 418
 419    public boolean deleteFile(Message message) {
 420        File file = getFile(message);
 421        if (file.delete()) {
 422            updateMediaScanner(file);
 423            return true;
 424        } else {
 425            return false;
 426        }
 427    }
 428
 429    public DownloadableFile getFile(Message message) {
 430        return getFile(message, true);
 431    }
 432
 433    public DownloadableFile getFileForPath(String path, String mime) {
 434        final DownloadableFile file;
 435        if (path.startsWith("/")) {
 436            file = new DownloadableFile(path);
 437        } else {
 438            if (mime != null && mime.startsWith("image/")) {
 439                file = new DownloadableFile(getConversationsDirectory("Images") + path);
 440            } else if (mime != null && mime.startsWith("video/")) {
 441                file = new DownloadableFile(getConversationsDirectory("Videos") + path);
 442            } else {
 443                file = new DownloadableFile(getConversationsDirectory("Files") + path);
 444            }
 445        }
 446        return file;
 447    }
 448
 449    public DownloadableFile getFile(Message message, boolean decrypted) {
 450        final boolean encrypted = !decrypted
 451                && (message.getEncryption() == Message.ENCRYPTION_PGP
 452                || message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
 453        String path = message.getRelativeFilePath();
 454        if (path == null) {
 455            path = message.getUuid();
 456        }
 457        final DownloadableFile file = getFileForPath(path, message.getMimeType());
 458        if (encrypted) {
 459            return new DownloadableFile(getConversationsDirectory("Files") + file.getName() + ".pgp");
 460        } else {
 461            return file;
 462        }
 463    }
 464
 465    public List<Attachment> convertToAttachments(List<DatabaseBackend.FilePath> relativeFilePaths) {
 466        List<Attachment> attachments = new ArrayList<>();
 467        for(DatabaseBackend.FilePath relativeFilePath : relativeFilePaths) {
 468            final String mime = MimeUtils.guessMimeTypeFromExtension(MimeUtils.extractRelevantExtension(relativeFilePath.path));
 469            Log.d(Config.LOGTAG,"mime="+mime);
 470            File file = getFileForPath(relativeFilePath.path, mime);
 471            if (file.exists()) {
 472                attachments.add(Attachment.of(relativeFilePath.uuid, file,mime));
 473            } else {
 474                Log.d(Config.LOGTAG,"file "+file.getAbsolutePath()+" doesnt exist");
 475            }
 476        }
 477        return attachments;
 478    }
 479
 480    private String getConversationsDirectory(final String type) {
 481        return getConversationsDirectory(mXmppConnectionService, type);
 482    }
 483
 484    private Bitmap resize(final Bitmap originalBitmap, int size) throws IOException {
 485        int w = originalBitmap.getWidth();
 486        int h = originalBitmap.getHeight();
 487        if (w <= 0 || h <= 0) {
 488            throw new IOException("Decoded bitmap reported bounds smaller 0");
 489        } else if (Math.max(w, h) > size) {
 490            int scalledW;
 491            int scalledH;
 492            if (w <= h) {
 493                scalledW = Math.max((int) (w / ((double) h / size)), 1);
 494                scalledH = size;
 495            } else {
 496                scalledW = size;
 497                scalledH = Math.max((int) (h / ((double) w / size)), 1);
 498            }
 499            final Bitmap result = Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
 500            if (!originalBitmap.isRecycled()) {
 501                originalBitmap.recycle();
 502            }
 503            return result;
 504        } else {
 505            return originalBitmap;
 506        }
 507    }
 508
 509    public boolean useImageAsIs(Uri uri) {
 510        String path = getOriginalPath(uri);
 511        if (path == null || isPathBlacklisted(path)) {
 512            return false;
 513        }
 514        File file = new File(path);
 515        long size = file.length();
 516        if (size == 0 || size >= mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize)) {
 517            return false;
 518        }
 519        BitmapFactory.Options options = new BitmapFactory.Options();
 520        options.inJustDecodeBounds = true;
 521        try {
 522            BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri), null, options);
 523            if (options.outMimeType == null || options.outHeight <= 0 || options.outWidth <= 0) {
 524                return false;
 525            }
 526            return (options.outWidth <= Config.IMAGE_SIZE && options.outHeight <= Config.IMAGE_SIZE && options.outMimeType.contains(Config.IMAGE_FORMAT.name().toLowerCase()));
 527        } catch (FileNotFoundException e) {
 528            return false;
 529        }
 530    }
 531
 532    public String getOriginalPath(Uri uri) {
 533        return FileUtils.getPath(mXmppConnectionService, uri);
 534    }
 535
 536    private void copyFileToPrivateStorage(File file, Uri uri) throws FileCopyException {
 537        Log.d(Config.LOGTAG, "copy file (" + uri.toString() + ") to private storage " + file.getAbsolutePath());
 538        file.getParentFile().mkdirs();
 539        OutputStream os = null;
 540        InputStream is = null;
 541        try {
 542            file.createNewFile();
 543            os = new FileOutputStream(file);
 544            is = mXmppConnectionService.getContentResolver().openInputStream(uri);
 545            byte[] buffer = new byte[1024];
 546            int length;
 547            while ((length = is.read(buffer)) > 0) {
 548                try {
 549                    os.write(buffer, 0, length);
 550                } catch (IOException e) {
 551                    throw new FileWriterException();
 552                }
 553            }
 554            try {
 555                os.flush();
 556            } catch (IOException e) {
 557                throw new FileWriterException();
 558            }
 559        } catch (FileNotFoundException e) {
 560            throw new FileCopyException(R.string.error_file_not_found);
 561        } catch (FileWriterException e) {
 562            throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
 563        } catch (IOException e) {
 564            e.printStackTrace();
 565            throw new FileCopyException(R.string.error_io_exception);
 566        } finally {
 567            close(os);
 568            close(is);
 569        }
 570    }
 571
 572    public void copyFileToPrivateStorage(Message message, Uri uri, String type) throws FileCopyException {
 573        String mime = type != null ? type : MimeUtils.guessMimeTypeFromUri(mXmppConnectionService, uri);
 574        Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage (mime=" + mime + ")");
 575        String extension = MimeUtils.guessExtensionFromMimeType(mime);
 576        if (extension == null) {
 577            Log.d(Config.LOGTAG, "extension from mime type was null");
 578            extension = getExtensionFromUri(uri);
 579        }
 580        if ("ogg".equals(extension) && type != null && type.startsWith("audio/")) {
 581            extension = "oga";
 582        }
 583        message.setRelativeFilePath(message.getUuid() + "." + extension);
 584        copyFileToPrivateStorage(mXmppConnectionService.getFileBackend().getFile(message), uri);
 585    }
 586
 587    private String getExtensionFromUri(Uri uri) {
 588        String[] projection = {MediaStore.MediaColumns.DATA};
 589        String filename = null;
 590        Cursor cursor;
 591        try {
 592            cursor = mXmppConnectionService.getContentResolver().query(uri, projection, null, null, null);
 593        } catch (IllegalArgumentException e) {
 594            cursor = null;
 595        }
 596        if (cursor != null) {
 597            try {
 598                if (cursor.moveToFirst()) {
 599                    filename = cursor.getString(0);
 600                }
 601            } catch (Exception e) {
 602                filename = null;
 603            } finally {
 604                cursor.close();
 605            }
 606        }
 607        if (filename == null) {
 608            final List<String> segments = uri.getPathSegments();
 609            if (segments.size() > 0) {
 610                filename = segments.get(segments.size() - 1);
 611            }
 612        }
 613        int pos = filename == null ? -1 : filename.lastIndexOf('.');
 614        return pos > 0 ? filename.substring(pos + 1) : null;
 615    }
 616
 617    private void copyImageToPrivateStorage(File file, Uri image, int sampleSize) throws FileCopyException {
 618        file.getParentFile().mkdirs();
 619        InputStream is = null;
 620        OutputStream os = null;
 621        try {
 622            if (!file.exists() && !file.createNewFile()) {
 623                throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
 624            }
 625            is = mXmppConnectionService.getContentResolver().openInputStream(image);
 626            if (is == null) {
 627                throw new FileCopyException(R.string.error_not_an_image_file);
 628            }
 629            Bitmap originalBitmap;
 630            BitmapFactory.Options options = new BitmapFactory.Options();
 631            int inSampleSize = (int) Math.pow(2, sampleSize);
 632            Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
 633            options.inSampleSize = inSampleSize;
 634            originalBitmap = BitmapFactory.decodeStream(is, null, options);
 635            is.close();
 636            if (originalBitmap == null) {
 637                throw new FileCopyException(R.string.error_not_an_image_file);
 638            }
 639            Bitmap scaledBitmap = resize(originalBitmap, Config.IMAGE_SIZE);
 640            int rotation = getRotation(image);
 641            scaledBitmap = rotate(scaledBitmap, rotation);
 642            boolean targetSizeReached = false;
 643            int quality = Config.IMAGE_QUALITY;
 644            final int imageMaxSize = mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize);
 645            while (!targetSizeReached) {
 646                os = new FileOutputStream(file);
 647                boolean success = scaledBitmap.compress(Config.IMAGE_FORMAT, quality, os);
 648                if (!success) {
 649                    throw new FileCopyException(R.string.error_compressing_image);
 650                }
 651                os.flush();
 652                targetSizeReached = file.length() <= imageMaxSize || quality <= 50;
 653                quality -= 5;
 654            }
 655            scaledBitmap.recycle();
 656        } catch (FileNotFoundException e) {
 657            throw new FileCopyException(R.string.error_file_not_found);
 658        } catch (IOException e) {
 659            e.printStackTrace();
 660            throw new FileCopyException(R.string.error_io_exception);
 661        } catch (SecurityException e) {
 662            throw new FileCopyException(R.string.error_security_exception_during_image_copy);
 663        } catch (OutOfMemoryError e) {
 664            ++sampleSize;
 665            if (sampleSize <= 3) {
 666                copyImageToPrivateStorage(file, image, sampleSize);
 667            } else {
 668                throw new FileCopyException(R.string.error_out_of_memory);
 669            }
 670        } finally {
 671            close(os);
 672            close(is);
 673        }
 674    }
 675
 676    public void copyImageToPrivateStorage(File file, Uri image) throws FileCopyException {
 677        Log.d(Config.LOGTAG, "copy image (" + image.toString() + ") to private storage " + file.getAbsolutePath());
 678        copyImageToPrivateStorage(file, image, 0);
 679    }
 680
 681    public void copyImageToPrivateStorage(Message message, Uri image) throws FileCopyException {
 682        switch (Config.IMAGE_FORMAT) {
 683            case JPEG:
 684                message.setRelativeFilePath(message.getUuid() + ".jpg");
 685                break;
 686            case PNG:
 687                message.setRelativeFilePath(message.getUuid() + ".png");
 688                break;
 689            case WEBP:
 690                message.setRelativeFilePath(message.getUuid() + ".webp");
 691                break;
 692        }
 693        copyImageToPrivateStorage(getFile(message), image);
 694        updateFileParams(message);
 695    }
 696
 697    public boolean unusualBounds(Uri image) {
 698        try {
 699            BitmapFactory.Options options = new BitmapFactory.Options();
 700            options.inJustDecodeBounds = true;
 701            BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
 702            float ratio = (float) options.outHeight / options.outWidth;
 703            return ratio > (21.0f / 9.0f) || ratio < (9.0f / 21.0f);
 704        } catch (Exception e) {
 705            return false;
 706        }
 707    }
 708
 709    private int getRotation(File file) {
 710        return getRotation(Uri.parse("file://" + file.getAbsolutePath()));
 711    }
 712
 713    private int getRotation(Uri image) {
 714        InputStream is = null;
 715        try {
 716            is = mXmppConnectionService.getContentResolver().openInputStream(image);
 717            return ExifHelper.getOrientation(is);
 718        } catch (FileNotFoundException e) {
 719            return 0;
 720        } finally {
 721            close(is);
 722        }
 723    }
 724
 725    public Bitmap getThumbnail(Message message, int size, boolean cacheOnly) throws IOException {
 726        final String uuid = message.getUuid();
 727        final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
 728        Bitmap thumbnail = cache.get(uuid);
 729        if ((thumbnail == null) && (!cacheOnly)) {
 730            synchronized (THUMBNAIL_LOCK) {
 731                thumbnail = cache.get(uuid);
 732                if (thumbnail != null) {
 733                    return thumbnail;
 734                }
 735                DownloadableFile file = getFile(message);
 736                final String mime = file.getMimeType();
 737                if (mime.startsWith("video/")) {
 738                    thumbnail = getVideoPreview(file, size);
 739                } else {
 740                    Bitmap fullsize = getFullsizeImagePreview(file, size);
 741                    if (fullsize == null) {
 742                        throw new FileNotFoundException();
 743                    }
 744                    thumbnail = resize(fullsize, size);
 745                    thumbnail = rotate(thumbnail, getRotation(file));
 746                    if (mime.equals("image/gif")) {
 747                        Bitmap withGifOverlay = thumbnail.copy(Bitmap.Config.ARGB_8888, true);
 748                        drawOverlay(withGifOverlay, paintOverlayBlack(withGifOverlay) ? R.drawable.play_gif_black : R.drawable.play_gif_white, 1.0f);
 749                        thumbnail.recycle();
 750                        thumbnail = withGifOverlay;
 751                    }
 752                }
 753                cache.put(uuid, thumbnail);
 754            }
 755        }
 756        return thumbnail;
 757    }
 758
 759    private Bitmap getFullsizeImagePreview(File file, int size) {
 760        BitmapFactory.Options options = new BitmapFactory.Options();
 761        options.inSampleSize = calcSampleSize(file, size);
 762        try {
 763            return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 764        } catch (OutOfMemoryError e) {
 765            options.inSampleSize *= 2;
 766            return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 767        }
 768    }
 769
 770    private void drawOverlay(Bitmap bitmap, int resource, float factor) {
 771        Bitmap overlay = BitmapFactory.decodeResource(mXmppConnectionService.getResources(), resource);
 772        Canvas canvas = new Canvas(bitmap);
 773        float targetSize = Math.min(canvas.getWidth(), canvas.getHeight()) * factor;
 774        Log.d(Config.LOGTAG, "target size overlay: " + targetSize + " overlay bitmap size was " + overlay.getHeight());
 775        float left = (canvas.getWidth() - targetSize) / 2.0f;
 776        float top = (canvas.getHeight() - targetSize) / 2.0f;
 777        RectF dst = new RectF(left, top, left + targetSize - 1, top + targetSize - 1);
 778        canvas.drawBitmap(overlay, null, dst, createAntiAliasingPaint());
 779    }
 780
 781    /**
 782     * https://stackoverflow.com/a/3943023/210897
 783     */
 784    private boolean paintOverlayBlack(final Bitmap bitmap) {
 785        final int h = bitmap.getHeight();
 786        final int w = bitmap.getWidth();
 787        int record = 0;
 788        for (int y = Math.round(h * IGNORE_PADDING); y < h - Math.round(h * IGNORE_PADDING); ++y) {
 789            for (int x = Math.round(w * IGNORE_PADDING); x < w - Math.round(w * IGNORE_PADDING); ++x) {
 790                int pixel = bitmap.getPixel(x, y);
 791                if ((Color.red(pixel) * 0.299 + Color.green(pixel) * 0.587 + Color.blue(pixel) * 0.114) > 186) {
 792                    --record;
 793                } else {
 794                    ++record;
 795                }
 796            }
 797        }
 798        return record < 0;
 799    }
 800
 801    private Bitmap cropCenterSquareVideo(Uri uri, int size) {
 802        MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
 803        Bitmap frame;
 804        try {
 805            metadataRetriever.setDataSource(mXmppConnectionService, uri);
 806            frame = metadataRetriever.getFrameAtTime(0);
 807            metadataRetriever.release();
 808            return cropCenterSquare(frame, size);
 809        } catch (Exception e) {
 810            frame = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 811            frame.eraseColor(0xff000000);
 812            return frame;
 813        }
 814    }
 815
 816    private Bitmap getVideoPreview(File file, int size) {
 817        MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
 818        Bitmap frame;
 819        try {
 820            metadataRetriever.setDataSource(file.getAbsolutePath());
 821            frame = metadataRetriever.getFrameAtTime(0);
 822            metadataRetriever.release();
 823            frame = resize(frame, size);
 824        } catch (IOException | RuntimeException e) {
 825            frame = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 826            frame.eraseColor(0xff000000);
 827        }
 828        drawOverlay(frame, paintOverlayBlack(frame) ? R.drawable.play_video_black : R.drawable.play_video_white, 0.75f);
 829        return frame;
 830    }
 831
 832    public Uri getTakePhotoUri() {
 833        File file;
 834        if (Config.ONLY_INTERNAL_STORAGE) {
 835            file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath(), "Camera/IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
 836        } else {
 837            file = new File(getTakePhotoPath() + "IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
 838        }
 839        file.getParentFile().mkdirs();
 840        return getUriForFile(mXmppConnectionService, file);
 841    }
 842
 843    public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
 844
 845        final Avatar uncompressAvatar = getUncompressedAvatar(image);
 846        if (uncompressAvatar != null && uncompressAvatar.image.length() <= Config.AVATAR_CHAR_LIMIT) {
 847            return uncompressAvatar;
 848        }
 849        if (uncompressAvatar != null) {
 850            Log.d(Config.LOGTAG, "uncompressed avatar exceeded char limit by " + (uncompressAvatar.image.length() - Config.AVATAR_CHAR_LIMIT));
 851        }
 852
 853        Bitmap bm = cropCenterSquare(image, size);
 854        if (bm == null) {
 855            return null;
 856        }
 857        if (hasAlpha(bm)) {
 858            Log.d(Config.LOGTAG, "alpha in avatar detected; uploading as PNG");
 859            bm.recycle();
 860            bm = cropCenterSquare(image, 96);
 861            return getPepAvatar(bm, Bitmap.CompressFormat.PNG, 100);
 862        }
 863        return getPepAvatar(bm, format, 100);
 864    }
 865
 866    private Avatar getUncompressedAvatar(Uri uri) {
 867        Bitmap bitmap = null;
 868        try {
 869            bitmap = BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri));
 870            return getPepAvatar(bitmap, Bitmap.CompressFormat.PNG, 100);
 871        } catch (Exception e) {
 872            return null;
 873        } finally {
 874            if (bitmap != null) {
 875                bitmap.recycle();
 876            }
 877        }
 878    }
 879
 880    private Avatar getPepAvatar(Bitmap bitmap, Bitmap.CompressFormat format, int quality) {
 881        try {
 882            ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
 883            Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
 884            MessageDigest digest = MessageDigest.getInstance("SHA-1");
 885            DigestOutputStream mDigestOutputStream = new DigestOutputStream(mBase64OutputStream, digest);
 886            if (!bitmap.compress(format, quality, mDigestOutputStream)) {
 887                return null;
 888            }
 889            mDigestOutputStream.flush();
 890            mDigestOutputStream.close();
 891            long chars = mByteArrayOutputStream.size();
 892            if (format != Bitmap.CompressFormat.PNG && quality >= 50 && chars >= Config.AVATAR_CHAR_LIMIT) {
 893                int q = quality - 2;
 894                Log.d(Config.LOGTAG, "avatar char length was " + chars + " reducing quality to " + q);
 895                return getPepAvatar(bitmap, format, q);
 896            }
 897            Log.d(Config.LOGTAG, "settled on char length " + chars + " with quality=" + quality);
 898            final Avatar avatar = new Avatar();
 899            avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
 900            avatar.image = new String(mByteArrayOutputStream.toByteArray());
 901            if (format.equals(Bitmap.CompressFormat.WEBP)) {
 902                avatar.type = "image/webp";
 903            } else if (format.equals(Bitmap.CompressFormat.JPEG)) {
 904                avatar.type = "image/jpeg";
 905            } else if (format.equals(Bitmap.CompressFormat.PNG)) {
 906                avatar.type = "image/png";
 907            }
 908            avatar.width = bitmap.getWidth();
 909            avatar.height = bitmap.getHeight();
 910            return avatar;
 911        } catch (OutOfMemoryError e) {
 912            Log.d(Config.LOGTAG,"unable to convert avatar to base64 due to low memory");
 913            return null;
 914        } catch (Exception e) {
 915            return null;
 916        }
 917    }
 918
 919    public Avatar getStoredPepAvatar(String hash) {
 920        if (hash == null) {
 921            return null;
 922        }
 923        Avatar avatar = new Avatar();
 924        File file = new File(getAvatarPath(hash));
 925        FileInputStream is = null;
 926        try {
 927            avatar.size = file.length();
 928            BitmapFactory.Options options = new BitmapFactory.Options();
 929            options.inJustDecodeBounds = true;
 930            BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 931            is = new FileInputStream(file);
 932            ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
 933            Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
 934            MessageDigest digest = MessageDigest.getInstance("SHA-1");
 935            DigestOutputStream os = new DigestOutputStream(mBase64OutputStream, digest);
 936            byte[] buffer = new byte[4096];
 937            int length;
 938            while ((length = is.read(buffer)) > 0) {
 939                os.write(buffer, 0, length);
 940            }
 941            os.flush();
 942            os.close();
 943            avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
 944            avatar.image = new String(mByteArrayOutputStream.toByteArray());
 945            avatar.height = options.outHeight;
 946            avatar.width = options.outWidth;
 947            avatar.type = options.outMimeType;
 948            return avatar;
 949        } catch (NoSuchAlgorithmException | IOException e) {
 950            return null;
 951        } finally {
 952            close(is);
 953        }
 954    }
 955
 956    public boolean isAvatarCached(Avatar avatar) {
 957        File file = new File(getAvatarPath(avatar.getFilename()));
 958        return file.exists();
 959    }
 960
 961    public boolean save(final Avatar avatar) {
 962        File file;
 963        if (isAvatarCached(avatar)) {
 964            file = new File(getAvatarPath(avatar.getFilename()));
 965            avatar.size = file.length();
 966        } else {
 967            file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath() + "/" + UUID.randomUUID().toString());
 968            if (file.getParentFile().mkdirs()) {
 969                Log.d(Config.LOGTAG, "created cache directory");
 970            }
 971            OutputStream os = null;
 972            try {
 973                if (!file.createNewFile()) {
 974                    Log.d(Config.LOGTAG, "unable to create temporary file " + file.getAbsolutePath());
 975                }
 976                os = new FileOutputStream(file);
 977                MessageDigest digest = MessageDigest.getInstance("SHA-1");
 978                digest.reset();
 979                DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
 980                final byte[] bytes = avatar.getImageAsBytes();
 981                mDigestOutputStream.write(bytes);
 982                mDigestOutputStream.flush();
 983                mDigestOutputStream.close();
 984                String sha1sum = CryptoHelper.bytesToHex(digest.digest());
 985                if (sha1sum.equals(avatar.sha1sum)) {
 986                    File outputFile = new File(getAvatarPath(avatar.getFilename()));
 987                    if (outputFile.getParentFile().mkdirs()) {
 988                        Log.d(Config.LOGTAG, "created avatar directory");
 989                    }
 990                    String filename = getAvatarPath(avatar.getFilename());
 991                    if (!file.renameTo(new File(filename))) {
 992                        Log.d(Config.LOGTAG, "unable to rename " + file.getAbsolutePath() + " to " + outputFile);
 993                        return false;
 994                    }
 995                } else {
 996                    Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
 997                    if (!file.delete()) {
 998                        Log.d(Config.LOGTAG, "unable to delete temporary file");
 999                    }
1000                    return false;
1001                }
1002                avatar.size = bytes.length;
1003            } catch (IllegalArgumentException | IOException | NoSuchAlgorithmException e) {
1004                return false;
1005            } finally {
1006                close(os);
1007            }
1008        }
1009        return true;
1010    }
1011
1012    private String getAvatarPath(String avatar) {
1013        return mXmppConnectionService.getFilesDir().getAbsolutePath() + "/avatars/" + avatar;
1014    }
1015
1016    public Uri getAvatarUri(String avatar) {
1017        return Uri.parse("file:" + getAvatarPath(avatar));
1018    }
1019
1020    public Bitmap cropCenterSquare(Uri image, int size) {
1021        if (image == null) {
1022            return null;
1023        }
1024        InputStream is = null;
1025        try {
1026            BitmapFactory.Options options = new BitmapFactory.Options();
1027            options.inSampleSize = calcSampleSize(image, size);
1028            is = mXmppConnectionService.getContentResolver().openInputStream(image);
1029            if (is == null) {
1030                return null;
1031            }
1032            Bitmap input = BitmapFactory.decodeStream(is, null, options);
1033            if (input == null) {
1034                return null;
1035            } else {
1036                input = rotate(input, getRotation(image));
1037                return cropCenterSquare(input, size);
1038            }
1039        } catch (FileNotFoundException | SecurityException e) {
1040            Log.d(Config.LOGTAG,"unable to open file "+image.toString(), e);
1041            return null;
1042        } finally {
1043            close(is);
1044        }
1045    }
1046
1047    public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
1048        if (image == null) {
1049            return null;
1050        }
1051        InputStream is = null;
1052        try {
1053            BitmapFactory.Options options = new BitmapFactory.Options();
1054            options.inSampleSize = calcSampleSize(image, Math.max(newHeight, newWidth));
1055            is = mXmppConnectionService.getContentResolver().openInputStream(image);
1056            if (is == null) {
1057                return null;
1058            }
1059            Bitmap source = BitmapFactory.decodeStream(is, null, options);
1060            if (source == null) {
1061                return null;
1062            }
1063            int sourceWidth = source.getWidth();
1064            int sourceHeight = source.getHeight();
1065            float xScale = (float) newWidth / sourceWidth;
1066            float yScale = (float) newHeight / sourceHeight;
1067            float scale = Math.max(xScale, yScale);
1068            float scaledWidth = scale * sourceWidth;
1069            float scaledHeight = scale * sourceHeight;
1070            float left = (newWidth - scaledWidth) / 2;
1071            float top = (newHeight - scaledHeight) / 2;
1072
1073            RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
1074            Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
1075            Canvas canvas = new Canvas(dest);
1076            canvas.drawBitmap(source, null, targetRect, createAntiAliasingPaint());
1077            if (source.isRecycled()) {
1078                source.recycle();
1079            }
1080            return dest;
1081        } catch (SecurityException e) {
1082            return null; //android 6.0 with revoked permissions for example
1083        } catch (FileNotFoundException e) {
1084            return null;
1085        } finally {
1086            close(is);
1087        }
1088    }
1089
1090    public Bitmap cropCenterSquare(Bitmap input, int size) {
1091        int w = input.getWidth();
1092        int h = input.getHeight();
1093
1094        float scale = Math.max((float) size / h, (float) size / w);
1095
1096        float outWidth = scale * w;
1097        float outHeight = scale * h;
1098        float left = (size - outWidth) / 2;
1099        float top = (size - outHeight) / 2;
1100        RectF target = new RectF(left, top, left + outWidth, top + outHeight);
1101
1102        Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
1103        Canvas canvas = new Canvas(output);
1104        canvas.drawBitmap(input, null, target, createAntiAliasingPaint());
1105        if (!input.isRecycled()) {
1106            input.recycle();
1107        }
1108        return output;
1109    }
1110
1111    private int calcSampleSize(Uri image, int size) throws FileNotFoundException, SecurityException {
1112        BitmapFactory.Options options = new BitmapFactory.Options();
1113        options.inJustDecodeBounds = true;
1114        BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
1115        return calcSampleSize(options, size);
1116    }
1117
1118    public void updateFileParams(Message message) {
1119        updateFileParams(message, null);
1120    }
1121
1122    public void updateFileParams(Message message, URL url) {
1123        DownloadableFile file = getFile(message);
1124        final String mime = file.getMimeType();
1125        boolean image = message.getType() == Message.TYPE_IMAGE || (mime != null && mime.startsWith("image/"));
1126        boolean video = mime != null && mime.startsWith("video/");
1127        boolean audio = mime != null && mime.startsWith("audio/");
1128        final StringBuilder body = new StringBuilder();
1129        if (url != null) {
1130            body.append(url.toString());
1131        }
1132        body.append('|').append(file.getSize());
1133        if (image || video) {
1134            try {
1135                Dimensions dimensions = image ? getImageDimensions(file) : getVideoDimensions(file);
1136                if (dimensions.valid()) {
1137                    body.append('|').append(dimensions.width).append('|').append(dimensions.height);
1138                }
1139            } catch (NotAVideoFile notAVideoFile) {
1140                Log.d(Config.LOGTAG, "file with mime type " + file.getMimeType() + " was not a video file");
1141                //fall threw
1142            }
1143        } else if (audio) {
1144            body.append("|0|0|").append(getMediaRuntime(file));
1145        }
1146        message.setBody(body.toString());
1147    }
1148
1149    public int getMediaRuntime(Uri uri) {
1150        try {
1151            MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
1152            mediaMetadataRetriever.setDataSource(mXmppConnectionService, uri);
1153            return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
1154        } catch (RuntimeException e) {
1155            return 0;
1156        }
1157    }
1158
1159    private int getMediaRuntime(File file) {
1160        try {
1161            MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
1162            mediaMetadataRetriever.setDataSource(file.toString());
1163            return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
1164        } catch (RuntimeException e) {
1165            return 0;
1166        }
1167    }
1168
1169    private Dimensions getImageDimensions(File file) {
1170        BitmapFactory.Options options = new BitmapFactory.Options();
1171        options.inJustDecodeBounds = true;
1172        BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1173        int rotation = getRotation(file);
1174        boolean rotated = rotation == 90 || rotation == 270;
1175        int imageHeight = rotated ? options.outWidth : options.outHeight;
1176        int imageWidth = rotated ? options.outHeight : options.outWidth;
1177        return new Dimensions(imageHeight, imageWidth);
1178    }
1179
1180    private Dimensions getVideoDimensions(File file) throws NotAVideoFile {
1181        MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
1182        try {
1183            metadataRetriever.setDataSource(file.getAbsolutePath());
1184        } catch (RuntimeException e) {
1185            throw new NotAVideoFile(e);
1186        }
1187        return getVideoDimensions(metadataRetriever);
1188    }
1189
1190    public Bitmap getAvatar(String avatar, int size) {
1191        if (avatar == null) {
1192            return null;
1193        }
1194        Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
1195        if (bm == null) {
1196            return null;
1197        }
1198        return bm;
1199    }
1200
1201    public boolean isFileAvailable(Message message) {
1202        return getFile(message).exists();
1203    }
1204
1205    private static class Dimensions {
1206        public final int width;
1207        public final int height;
1208
1209        Dimensions(int height, int width) {
1210            this.width = width;
1211            this.height = height;
1212        }
1213
1214        public int getMin() {
1215            return Math.min(width, height);
1216        }
1217
1218        public boolean valid() {
1219            return width > 0 && height > 0;
1220        }
1221    }
1222
1223    private static class NotAVideoFile extends Exception {
1224        public NotAVideoFile(Throwable t) {
1225            super(t);
1226        }
1227
1228        public NotAVideoFile() {
1229            super();
1230        }
1231    }
1232
1233    public class FileCopyException extends Exception {
1234        private static final long serialVersionUID = -1010013599132881427L;
1235        private int resId;
1236
1237        public FileCopyException(int resId) {
1238            this.resId = resId;
1239        }
1240
1241        public int getResId() {
1242            return resId;
1243        }
1244    }
1245}