1package eu.siacs.conversations.persistance;
   2
   3import android.annotation.TargetApi;
   4import android.content.ContentResolver;
   5import android.content.Context;
   6import android.database.Cursor;
   7import android.graphics.Bitmap;
   8import android.graphics.BitmapFactory;
   9import android.graphics.Canvas;
  10import android.graphics.Color;
  11import android.graphics.Matrix;
  12import android.graphics.Paint;
  13import android.graphics.RectF;
  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.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.ServerSocket;
  42import java.net.Socket;
  43import java.net.URL;
  44import java.security.DigestOutputStream;
  45import java.security.MessageDigest;
  46import java.security.NoSuchAlgorithmException;
  47import java.text.SimpleDateFormat;
  48import java.util.ArrayList;
  49import java.util.Date;
  50import java.util.List;
  51import java.util.Locale;
  52import java.util.UUID;
  53
  54import eu.siacs.conversations.Config;
  55import eu.siacs.conversations.R;
  56import eu.siacs.conversations.entities.DownloadableFile;
  57import eu.siacs.conversations.entities.Message;
  58import eu.siacs.conversations.services.AttachFileToConversationRunnable;
  59import eu.siacs.conversations.services.XmppConnectionService;
  60import eu.siacs.conversations.ui.RecordingActivity;
  61import eu.siacs.conversations.ui.util.Attachment;
  62import eu.siacs.conversations.utils.CryptoHelper;
  63import eu.siacs.conversations.utils.ExifHelper;
  64import eu.siacs.conversations.utils.FileUtils;
  65import eu.siacs.conversations.utils.FileWriterException;
  66import eu.siacs.conversations.utils.MimeUtils;
  67import eu.siacs.conversations.xmpp.pep.Avatar;
  68
  69public class FileBackend {
  70
  71    private static final Object THUMBNAIL_LOCK = new Object();
  72
  73    private static final SimpleDateFormat IMAGE_DATE_FORMAT = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US);
  74
  75    private static final String FILE_PROVIDER = ".files";
  76    private static final float IGNORE_PADDING = 0.15f;
  77    private XmppConnectionService mXmppConnectionService;
  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        final boolean compressVideo = !AttachFileToConversationRunnable.getVideoCompression(context).equals("uncompressed");
 113        if (max <= 0) {
 114            Log.d(Config.LOGTAG, "server did not report max file size for http upload");
 115            return true; //exception to be compatible with HTTP Upload < v0.2
 116        }
 117        for (Attachment attachment : attachments) {
 118            if (attachment.getType() != Attachment.Type.FILE) {
 119                continue;
 120            }
 121            String mime = attachment.getMime();
 122            if (mime != null && mime.startsWith("video/") && compressVideo) {
 123                try {
 124                    Dimensions dimensions = FileBackend.getVideoDimensions(context, attachment.getUri());
 125                    if (dimensions.getMin() > 720) {
 126                        Log.d(Config.LOGTAG, "do not consider video file with min width larger than 720 for size check");
 127                        continue;
 128                    }
 129                } catch (NotAVideoFile notAVideoFile) {
 130                    //ignore and fall through
 131                }
 132            }
 133            if (FileBackend.getFileSize(context, attachment.getUri()) > max) {
 134                Log.d(Config.LOGTAG, "not all files are under " + max + " bytes. suggesting falling back to jingle");
 135                return false;
 136            }
 137        }
 138        return true;
 139    }
 140
 141    public static String getConversationsDirectory(Context context, final String type) {
 142        if (Config.ONLY_INTERNAL_STORAGE) {
 143            return context.getFilesDir().getAbsolutePath() + "/" + type + "/";
 144        } else {
 145            return getAppMediaDirectory(context) + context.getString(R.string.app_name) + " " + type + "/";
 146        }
 147    }
 148
 149    public static String getAppMediaDirectory(Context context) {
 150        return Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + context.getString(R.string.app_name) + "/Media/";
 151    }
 152
 153    public static String getBackupDirectory(Context context) {
 154        return getBackupDirectory(context.getString(R.string.app_name));
 155    }
 156
 157    public static String getBackupDirectory(String app) {
 158        return Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + app + "/Backup/";
 159    }
 160
 161    private static Bitmap rotate(Bitmap bitmap, int degree) {
 162        if (degree == 0) {
 163            return bitmap;
 164        }
 165        int w = bitmap.getWidth();
 166        int h = bitmap.getHeight();
 167        Matrix mtx = new Matrix();
 168        mtx.postRotate(degree);
 169        Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
 170        if (bitmap != null && !bitmap.isRecycled()) {
 171            bitmap.recycle();
 172        }
 173        return result;
 174    }
 175
 176    public static boolean isPathBlacklisted(String path) {
 177        final String androidDataPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Android/data/";
 178        return path.startsWith(androidDataPath);
 179    }
 180
 181    private static Paint createAntiAliasingPaint() {
 182        Paint paint = new Paint();
 183        paint.setAntiAlias(true);
 184        paint.setFilterBitmap(true);
 185        paint.setDither(true);
 186        return paint;
 187    }
 188
 189    private static String getTakePhotoPath() {
 190        return Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) + "/Camera/";
 191    }
 192
 193    public static Uri getUriForUri(Context context, Uri uri) {
 194        if ("file".equals(uri.getScheme())) {
 195            return getUriForFile(context, new File(uri.getPath()));
 196        } else {
 197            return uri;
 198        }
 199    }
 200
 201    public static Uri getUriForFile(Context context, File file) {
 202        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N || Config.ONLY_INTERNAL_STORAGE) {
 203            try {
 204                return FileProvider.getUriForFile(context, getAuthority(context), file);
 205            } catch (IllegalArgumentException e) {
 206                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 207                    throw new SecurityException(e);
 208                } else {
 209                    return Uri.fromFile(file);
 210                }
 211            }
 212        } else {
 213            return Uri.fromFile(file);
 214        }
 215    }
 216
 217    public static String getAuthority(Context context) {
 218        return context.getPackageName() + FILE_PROVIDER;
 219    }
 220
 221    private static boolean hasAlpha(final Bitmap bitmap) {
 222        for (int x = 0; x < bitmap.getWidth(); ++x) {
 223            for (int y = 0; y < bitmap.getWidth(); ++y) {
 224                if (Color.alpha(bitmap.getPixel(x, y)) < 255) {
 225                    return true;
 226                }
 227            }
 228        }
 229        return false;
 230    }
 231
 232    private static int calcSampleSize(File image, int size) {
 233        BitmapFactory.Options options = new BitmapFactory.Options();
 234        options.inJustDecodeBounds = true;
 235        BitmapFactory.decodeFile(image.getAbsolutePath(), options);
 236        return calcSampleSize(options, size);
 237    }
 238
 239
 240    private static int calcSampleSize(BitmapFactory.Options options, int size) {
 241        int height = options.outHeight;
 242        int width = options.outWidth;
 243        int inSampleSize = 1;
 244
 245        if (height > size || width > size) {
 246            int halfHeight = height / 2;
 247            int halfWidth = width / 2;
 248
 249            while ((halfHeight / inSampleSize) > size
 250                    && (halfWidth / inSampleSize) > size) {
 251                inSampleSize *= 2;
 252            }
 253        }
 254        return inSampleSize;
 255    }
 256
 257    private static Dimensions getVideoDimensions(Context context, Uri uri) throws NotAVideoFile {
 258        MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
 259        try {
 260            mediaMetadataRetriever.setDataSource(context, uri);
 261        } catch (RuntimeException e) {
 262            throw new NotAVideoFile(e);
 263        }
 264        return getVideoDimensions(mediaMetadataRetriever);
 265    }
 266
 267    private static Dimensions getVideoDimensionsOfFrame(MediaMetadataRetriever mediaMetadataRetriever) {
 268        Bitmap bitmap = null;
 269        try {
 270            bitmap = mediaMetadataRetriever.getFrameAtTime();
 271            return new Dimensions(bitmap.getHeight(), bitmap.getWidth());
 272        } catch (Exception e) {
 273            return null;
 274        } finally {
 275            if (bitmap != null) {
 276                bitmap.recycle();
 277                ;
 278            }
 279        }
 280    }
 281
 282    private static Dimensions getVideoDimensions(MediaMetadataRetriever metadataRetriever) throws NotAVideoFile {
 283        String hasVideo = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_HAS_VIDEO);
 284        if (hasVideo == null) {
 285            throw new NotAVideoFile();
 286        }
 287        Dimensions dimensions = getVideoDimensionsOfFrame(metadataRetriever);
 288        if (dimensions != null) {
 289            return dimensions;
 290        }
 291        final int rotation;
 292        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1) {
 293            rotation = extractRotationFromMediaRetriever(metadataRetriever);
 294        } else {
 295            rotation = 0;
 296        }
 297        boolean rotated = rotation == 90 || rotation == 270;
 298        int height;
 299        try {
 300            String h = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
 301            height = Integer.parseInt(h);
 302        } catch (Exception e) {
 303            height = -1;
 304        }
 305        int width;
 306        try {
 307            String w = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
 308            width = Integer.parseInt(w);
 309        } catch (Exception e) {
 310            width = -1;
 311        }
 312        metadataRetriever.release();
 313        Log.d(Config.LOGTAG, "extracted video dims " + width + "x" + height);
 314        return rotated ? new Dimensions(width, height) : new Dimensions(height, width);
 315    }
 316
 317    @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR1)
 318    private static int extractRotationFromMediaRetriever(MediaMetadataRetriever metadataRetriever) {
 319        String r = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
 320        try {
 321            return Integer.parseInt(r);
 322        } catch (Exception e) {
 323            return 0;
 324        }
 325    }
 326
 327    public static void close(final Closeable stream) {
 328        if (stream != null) {
 329            try {
 330                stream.close();
 331            } catch (Exception e) {
 332                Log.d(Config.LOGTAG, "unable to close stream", e);
 333            }
 334        }
 335    }
 336
 337    public static void close(final Socket socket) {
 338        if (socket != null) {
 339            try {
 340                socket.close();
 341            } catch (IOException e) {
 342                Log.d(Config.LOGTAG, "unable to close socket", e);
 343            }
 344        }
 345    }
 346
 347    public static void close(final ServerSocket socket) {
 348        if (socket != null) {
 349            try {
 350                socket.close();
 351            } catch (IOException e) {
 352                Log.d(Config.LOGTAG, "unable to close server socket", 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    public static Uri getMediaUri(Context context, File file) {
 397        final String filePath = file.getAbsolutePath();
 398        final Cursor cursor;
 399        try {
 400            cursor = context.getContentResolver().query(
 401                    MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
 402                    new String[]{MediaStore.Images.Media._ID},
 403                    MediaStore.Images.Media.DATA + "=? ",
 404                    new String[]{filePath}, null);
 405        } catch (SecurityException e) {
 406            return null;
 407        }
 408        if (cursor != null && cursor.moveToFirst()) {
 409            final int id = cursor.getInt(cursor.getColumnIndex(MediaStore.MediaColumns._ID));
 410            cursor.close();
 411            return Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, String.valueOf(id));
 412        } else {
 413            return null;
 414        }
 415    }
 416
 417    public static void updateFileParams(Message message, URL url, long size) {
 418        final StringBuilder body = new StringBuilder();
 419        body.append(url.toString()).append('|').append(size);
 420        message.setBody(body.toString());
 421    }
 422
 423    public Bitmap getPreviewForUri(Attachment attachment, int size, boolean cacheOnly) {
 424        final String key = "attachment_" + attachment.getUuid().toString() + "_" + String.valueOf(size);
 425        final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
 426        Bitmap bitmap = cache.get(key);
 427        if (bitmap != null || cacheOnly) {
 428            return bitmap;
 429        }
 430        if (attachment.getMime() != null && attachment.getMime().startsWith("video/")) {
 431            bitmap = cropCenterSquareVideo(attachment.getUri(), size);
 432            drawOverlay(bitmap, paintOverlayBlack(bitmap) ? R.drawable.play_video_black : R.drawable.play_video_white, 0.75f);
 433        } else {
 434            bitmap = cropCenterSquare(attachment.getUri(), size);
 435            if (bitmap != null && "image/gif".equals(attachment.getMime())) {
 436                Bitmap withGifOverlay = bitmap.copy(Bitmap.Config.ARGB_8888, true);
 437                drawOverlay(withGifOverlay, paintOverlayBlack(withGifOverlay) ? R.drawable.play_gif_black : R.drawable.play_gif_white, 1.0f);
 438                bitmap.recycle();
 439                bitmap = withGifOverlay;
 440            }
 441        }
 442        if (bitmap != null) {
 443            cache.put(key, bitmap);
 444        }
 445        return bitmap;
 446    }
 447
 448    private void createNoMedia(File diretory) {
 449        final File noMedia = new File(diretory, ".nomedia");
 450        if (!noMedia.exists()) {
 451            try {
 452                if (!noMedia.createNewFile()) {
 453                    Log.d(Config.LOGTAG, "created nomedia file " + noMedia.getAbsolutePath());
 454                }
 455            } catch (Exception e) {
 456                Log.d(Config.LOGTAG, "could not create nomedia file");
 457            }
 458        }
 459    }
 460
 461    public void updateMediaScanner(File file) {
 462        updateMediaScanner(file, null);
 463    }
 464
 465    public void updateMediaScanner(File file, final Runnable callback) {
 466        if (!isInDirectoryThatShouldNotBeScanned(mXmppConnectionService, file)) {
 467            MediaScannerConnection.scanFile(mXmppConnectionService, new String[]{file.getAbsolutePath()}, null, new MediaScannerConnection.MediaScannerConnectionClient() {
 468                @Override
 469                public void onMediaScannerConnected() {
 470
 471                }
 472
 473                @Override
 474                public void onScanCompleted(String path, Uri uri) {
 475                    if (callback != null && file.getAbsolutePath().equals(path)) {
 476                        callback.run();
 477                    } else {
 478                        Log.d(Config.LOGTAG, "media scanner scanned wrong file");
 479                        if (callback != null) {
 480                            callback.run();
 481                        }
 482                    }
 483                }
 484            });
 485            return;
 486            /*Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
 487            intent.setData(Uri.fromFile(file));
 488            mXmppConnectionService.sendBroadcast(intent);*/
 489        } else if (file.getAbsolutePath().startsWith(getAppMediaDirectory(mXmppConnectionService))) {
 490            createNoMedia(file.getParentFile());
 491        }
 492        if (callback != null) {
 493            callback.run();
 494        }
 495    }
 496
 497    public boolean deleteFile(Message message) {
 498        File file = getFile(message);
 499        if (file.delete()) {
 500            updateMediaScanner(file);
 501            return true;
 502        } else {
 503            return false;
 504        }
 505    }
 506
 507    public DownloadableFile getFile(Message message) {
 508        return getFile(message, true);
 509    }
 510
 511
 512
 513    public DownloadableFile getFileForPath(String path) {
 514        return getFileForPath(path, MimeUtils.guessMimeTypeFromExtension(MimeUtils.extractRelevantExtension(path)));
 515    }
 516
 517    public DownloadableFile getFileForPath(String path, String mime) {
 518        final DownloadableFile file;
 519        if (path.startsWith("/")) {
 520            file = new DownloadableFile(path);
 521        } else {
 522            if (mime != null && mime.startsWith("image/")) {
 523                file = new DownloadableFile(getConversationsDirectory("Images") + path);
 524            } else if (mime != null && mime.startsWith("video/")) {
 525                file = new DownloadableFile(getConversationsDirectory("Videos") + path);
 526            } else {
 527                file = new DownloadableFile(getConversationsDirectory("Files") + path);
 528            }
 529        }
 530        return file;
 531    }
 532
 533    public boolean isInternalFile(final File file) {
 534        final File internalFile = getFileForPath(file.getName());
 535        return file.getAbsolutePath().equals(internalFile.getAbsolutePath());
 536    }
 537
 538    public DownloadableFile getFile(Message message, boolean decrypted) {
 539        final boolean encrypted = !decrypted
 540                && (message.getEncryption() == Message.ENCRYPTION_PGP
 541                || message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
 542        String path = message.getRelativeFilePath();
 543        if (path == null) {
 544            path = message.getUuid();
 545        }
 546        final DownloadableFile file = getFileForPath(path, message.getMimeType());
 547        if (encrypted) {
 548            return new DownloadableFile(getConversationsDirectory("Files") + file.getName() + ".pgp");
 549        } else {
 550            return file;
 551        }
 552    }
 553
 554    public List<Attachment> convertToAttachments(List<DatabaseBackend.FilePath> relativeFilePaths) {
 555        List<Attachment> attachments = new ArrayList<>();
 556        for (DatabaseBackend.FilePath relativeFilePath : relativeFilePaths) {
 557            final String mime = MimeUtils.guessMimeTypeFromExtension(MimeUtils.extractRelevantExtension(relativeFilePath.path));
 558            final File file = getFileForPath(relativeFilePath.path, mime);
 559            attachments.add(Attachment.of(relativeFilePath.uuid, file, mime));
 560        }
 561        return attachments;
 562    }
 563
 564    private String getConversationsDirectory(final String type) {
 565        return getConversationsDirectory(mXmppConnectionService, type);
 566    }
 567
 568    private Bitmap resize(final Bitmap originalBitmap, int size) throws IOException {
 569        int w = originalBitmap.getWidth();
 570        int h = originalBitmap.getHeight();
 571        if (w <= 0 || h <= 0) {
 572            throw new IOException("Decoded bitmap reported bounds smaller 0");
 573        } else if (Math.max(w, h) > size) {
 574            int scalledW;
 575            int scalledH;
 576            if (w <= h) {
 577                scalledW = Math.max((int) (w / ((double) h / size)), 1);
 578                scalledH = size;
 579            } else {
 580                scalledW = size;
 581                scalledH = Math.max((int) (h / ((double) w / size)), 1);
 582            }
 583            final Bitmap result = Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
 584            if (!originalBitmap.isRecycled()) {
 585                originalBitmap.recycle();
 586            }
 587            return result;
 588        } else {
 589            return originalBitmap;
 590        }
 591    }
 592
 593    public boolean useImageAsIs(Uri uri) {
 594        String path = getOriginalPath(uri);
 595        if (path == null || isPathBlacklisted(path)) {
 596            return false;
 597        }
 598        File file = new File(path);
 599        long size = file.length();
 600        if (size == 0 || size >= mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize)) {
 601            return false;
 602        }
 603        BitmapFactory.Options options = new BitmapFactory.Options();
 604        options.inJustDecodeBounds = true;
 605        try {
 606            BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri), null, options);
 607            if (options.outMimeType == null || options.outHeight <= 0 || options.outWidth <= 0) {
 608                return false;
 609            }
 610            return (options.outWidth <= Config.IMAGE_SIZE && options.outHeight <= Config.IMAGE_SIZE && options.outMimeType.contains(Config.IMAGE_FORMAT.name().toLowerCase()));
 611        } catch (FileNotFoundException e) {
 612            return false;
 613        }
 614    }
 615
 616    public String getOriginalPath(Uri uri) {
 617        return FileUtils.getPath(mXmppConnectionService, uri);
 618    }
 619
 620    private void copyFileToPrivateStorage(File file, Uri uri) throws FileCopyException {
 621        Log.d(Config.LOGTAG, "copy file (" + uri.toString() + ") to private storage " + file.getAbsolutePath());
 622        file.getParentFile().mkdirs();
 623        OutputStream os = null;
 624        InputStream is = null;
 625        try {
 626            file.createNewFile();
 627            os = new FileOutputStream(file);
 628            is = mXmppConnectionService.getContentResolver().openInputStream(uri);
 629            byte[] buffer = new byte[1024];
 630            int length;
 631            while ((length = is.read(buffer)) > 0) {
 632                try {
 633                    os.write(buffer, 0, length);
 634                } catch (IOException e) {
 635                    throw new FileWriterException();
 636                }
 637            }
 638            try {
 639                os.flush();
 640            } catch (IOException e) {
 641                throw new FileWriterException();
 642            }
 643        } catch (FileNotFoundException e) {
 644            throw new FileCopyException(R.string.error_file_not_found);
 645        } catch (FileWriterException e) {
 646            throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
 647        } catch (IOException e) {
 648            e.printStackTrace();
 649            throw new FileCopyException(R.string.error_io_exception);
 650        } finally {
 651            close(os);
 652            close(is);
 653        }
 654    }
 655
 656    public void copyFileToPrivateStorage(Message message, Uri uri, String type) throws FileCopyException {
 657        String mime = MimeUtils.guessMimeTypeFromUriAndMime(mXmppConnectionService, uri, type);
 658        Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage (mime=" + mime + ")");
 659        String extension = MimeUtils.guessExtensionFromMimeType(mime);
 660        if (extension == null) {
 661            Log.d(Config.LOGTAG, "extension from mime type was null");
 662            extension = getExtensionFromUri(uri);
 663        }
 664        if ("ogg".equals(extension) && type != null && type.startsWith("audio/")) {
 665            extension = "oga";
 666        }
 667        message.setRelativeFilePath(message.getUuid() + "." + extension);
 668        copyFileToPrivateStorage(mXmppConnectionService.getFileBackend().getFile(message), uri);
 669    }
 670
 671    private String getExtensionFromUri(Uri uri) {
 672        String[] projection = {MediaStore.MediaColumns.DATA};
 673        String filename = null;
 674        Cursor cursor;
 675        try {
 676            cursor = mXmppConnectionService.getContentResolver().query(uri, projection, null, null, null);
 677        } catch (IllegalArgumentException e) {
 678            cursor = null;
 679        }
 680        if (cursor != null) {
 681            try {
 682                if (cursor.moveToFirst()) {
 683                    filename = cursor.getString(0);
 684                }
 685            } catch (Exception e) {
 686                filename = null;
 687            } finally {
 688                cursor.close();
 689            }
 690        }
 691        if (filename == null) {
 692            final List<String> segments = uri.getPathSegments();
 693            if (segments.size() > 0) {
 694                filename = segments.get(segments.size() - 1);
 695            }
 696        }
 697        int pos = filename == null ? -1 : filename.lastIndexOf('.');
 698        return pos > 0 ? filename.substring(pos + 1) : null;
 699    }
 700
 701    private void copyImageToPrivateStorage(File file, Uri image, int sampleSize) throws FileCopyException {
 702        file.getParentFile().mkdirs();
 703        InputStream is = null;
 704        OutputStream os = null;
 705        try {
 706            if (!file.exists() && !file.createNewFile()) {
 707                throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
 708            }
 709            is = mXmppConnectionService.getContentResolver().openInputStream(image);
 710            if (is == null) {
 711                throw new FileCopyException(R.string.error_not_an_image_file);
 712            }
 713            Bitmap originalBitmap;
 714            BitmapFactory.Options options = new BitmapFactory.Options();
 715            int inSampleSize = (int) Math.pow(2, sampleSize);
 716            Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
 717            options.inSampleSize = inSampleSize;
 718            originalBitmap = BitmapFactory.decodeStream(is, null, options);
 719            is.close();
 720            if (originalBitmap == null) {
 721                throw new FileCopyException(R.string.error_not_an_image_file);
 722            }
 723            Bitmap scaledBitmap = resize(originalBitmap, Config.IMAGE_SIZE);
 724            int rotation = getRotation(image);
 725            scaledBitmap = rotate(scaledBitmap, rotation);
 726            boolean targetSizeReached = false;
 727            int quality = Config.IMAGE_QUALITY;
 728            final int imageMaxSize = mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize);
 729            while (!targetSizeReached) {
 730                os = new FileOutputStream(file);
 731                boolean success = scaledBitmap.compress(Config.IMAGE_FORMAT, quality, os);
 732                if (!success) {
 733                    throw new FileCopyException(R.string.error_compressing_image);
 734                }
 735                os.flush();
 736                targetSizeReached = file.length() <= imageMaxSize || quality <= 50;
 737                quality -= 5;
 738            }
 739            scaledBitmap.recycle();
 740        } catch (FileNotFoundException e) {
 741            throw new FileCopyException(R.string.error_file_not_found);
 742        } catch (IOException e) {
 743            e.printStackTrace();
 744            throw new FileCopyException(R.string.error_io_exception);
 745        } catch (SecurityException e) {
 746            throw new FileCopyException(R.string.error_security_exception_during_image_copy);
 747        } catch (OutOfMemoryError e) {
 748            ++sampleSize;
 749            if (sampleSize <= 3) {
 750                copyImageToPrivateStorage(file, image, sampleSize);
 751            } else {
 752                throw new FileCopyException(R.string.error_out_of_memory);
 753            }
 754        } finally {
 755            close(os);
 756            close(is);
 757        }
 758    }
 759
 760    public void copyImageToPrivateStorage(File file, Uri image) throws FileCopyException {
 761        Log.d(Config.LOGTAG, "copy image (" + image.toString() + ") to private storage " + file.getAbsolutePath());
 762        copyImageToPrivateStorage(file, image, 0);
 763    }
 764
 765    public void copyImageToPrivateStorage(Message message, Uri image) throws FileCopyException {
 766        switch (Config.IMAGE_FORMAT) {
 767            case JPEG:
 768                message.setRelativeFilePath(message.getUuid() + ".jpg");
 769                break;
 770            case PNG:
 771                message.setRelativeFilePath(message.getUuid() + ".png");
 772                break;
 773            case WEBP:
 774                message.setRelativeFilePath(message.getUuid() + ".webp");
 775                break;
 776        }
 777        copyImageToPrivateStorage(getFile(message), image);
 778        updateFileParams(message);
 779    }
 780
 781    public boolean unusualBounds(Uri image) {
 782        try {
 783            BitmapFactory.Options options = new BitmapFactory.Options();
 784            options.inJustDecodeBounds = true;
 785            BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
 786            float ratio = (float) options.outHeight / options.outWidth;
 787            return ratio > (21.0f / 9.0f) || ratio < (9.0f / 21.0f);
 788        } catch (Exception e) {
 789            return false;
 790        }
 791    }
 792
 793    private int getRotation(File file) {
 794        return getRotation(Uri.parse("file://" + file.getAbsolutePath()));
 795    }
 796
 797    private int getRotation(Uri image) {
 798        InputStream is = null;
 799        try {
 800            is = mXmppConnectionService.getContentResolver().openInputStream(image);
 801            return ExifHelper.getOrientation(is);
 802        } catch (FileNotFoundException e) {
 803            return 0;
 804        } finally {
 805            close(is);
 806        }
 807    }
 808
 809    public Bitmap getThumbnail(Message message, int size, boolean cacheOnly) throws IOException {
 810        final String uuid = message.getUuid();
 811        final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
 812        Bitmap thumbnail = cache.get(uuid);
 813        if ((thumbnail == null) && (!cacheOnly)) {
 814            synchronized (THUMBNAIL_LOCK) {
 815                thumbnail = cache.get(uuid);
 816                if (thumbnail != null) {
 817                    return thumbnail;
 818                }
 819                DownloadableFile file = getFile(message);
 820                final String mime = file.getMimeType();
 821                if (mime.startsWith("video/")) {
 822                    thumbnail = getVideoPreview(file, size);
 823                } else {
 824                    Bitmap fullsize = getFullsizeImagePreview(file, size);
 825                    if (fullsize == null) {
 826                        throw new FileNotFoundException();
 827                    }
 828                    thumbnail = resize(fullsize, size);
 829                    thumbnail = rotate(thumbnail, getRotation(file));
 830                    if (mime.equals("image/gif")) {
 831                        Bitmap withGifOverlay = thumbnail.copy(Bitmap.Config.ARGB_8888, true);
 832                        drawOverlay(withGifOverlay, paintOverlayBlack(withGifOverlay) ? R.drawable.play_gif_black : R.drawable.play_gif_white, 1.0f);
 833                        thumbnail.recycle();
 834                        thumbnail = withGifOverlay;
 835                    }
 836                }
 837                cache.put(uuid, thumbnail);
 838            }
 839        }
 840        return thumbnail;
 841    }
 842
 843    private Bitmap getFullsizeImagePreview(File file, int size) {
 844        BitmapFactory.Options options = new BitmapFactory.Options();
 845        options.inSampleSize = calcSampleSize(file, size);
 846        try {
 847            return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 848        } catch (OutOfMemoryError e) {
 849            options.inSampleSize *= 2;
 850            return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 851        }
 852    }
 853
 854    private void drawOverlay(Bitmap bitmap, int resource, float factor) {
 855        Bitmap overlay = BitmapFactory.decodeResource(mXmppConnectionService.getResources(), resource);
 856        Canvas canvas = new Canvas(bitmap);
 857        float targetSize = Math.min(canvas.getWidth(), canvas.getHeight()) * factor;
 858        Log.d(Config.LOGTAG, "target size overlay: " + targetSize + " overlay bitmap size was " + overlay.getHeight());
 859        float left = (canvas.getWidth() - targetSize) / 2.0f;
 860        float top = (canvas.getHeight() - targetSize) / 2.0f;
 861        RectF dst = new RectF(left, top, left + targetSize - 1, top + targetSize - 1);
 862        canvas.drawBitmap(overlay, null, dst, createAntiAliasingPaint());
 863    }
 864
 865    /**
 866     * https://stackoverflow.com/a/3943023/210897
 867     */
 868    private boolean paintOverlayBlack(final Bitmap bitmap) {
 869        final int h = bitmap.getHeight();
 870        final int w = bitmap.getWidth();
 871        int record = 0;
 872        for (int y = Math.round(h * IGNORE_PADDING); y < h - Math.round(h * IGNORE_PADDING); ++y) {
 873            for (int x = Math.round(w * IGNORE_PADDING); x < w - Math.round(w * IGNORE_PADDING); ++x) {
 874                int pixel = bitmap.getPixel(x, y);
 875                if ((Color.red(pixel) * 0.299 + Color.green(pixel) * 0.587 + Color.blue(pixel) * 0.114) > 186) {
 876                    --record;
 877                } else {
 878                    ++record;
 879                }
 880            }
 881        }
 882        return record < 0;
 883    }
 884
 885    private Bitmap cropCenterSquareVideo(Uri uri, int size) {
 886        MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
 887        Bitmap frame;
 888        try {
 889            metadataRetriever.setDataSource(mXmppConnectionService, uri);
 890            frame = metadataRetriever.getFrameAtTime(0);
 891            metadataRetriever.release();
 892            return cropCenterSquare(frame, size);
 893        } catch (Exception e) {
 894            frame = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 895            frame.eraseColor(0xff000000);
 896            return frame;
 897        }
 898    }
 899
 900    private Bitmap getVideoPreview(File file, int size) {
 901        MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
 902        Bitmap frame;
 903        try {
 904            metadataRetriever.setDataSource(file.getAbsolutePath());
 905            frame = metadataRetriever.getFrameAtTime(0);
 906            metadataRetriever.release();
 907            frame = resize(frame, size);
 908        } catch (IOException | RuntimeException e) {
 909            frame = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 910            frame.eraseColor(0xff000000);
 911        }
 912        drawOverlay(frame, paintOverlayBlack(frame) ? R.drawable.play_video_black : R.drawable.play_video_white, 0.75f);
 913        return frame;
 914    }
 915
 916    public Uri getTakePhotoUri() {
 917        File file;
 918        if (Config.ONLY_INTERNAL_STORAGE) {
 919            file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath(), "Camera/IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
 920        } else {
 921            file = new File(getTakePhotoPath() + "IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
 922        }
 923        file.getParentFile().mkdirs();
 924        return getUriForFile(mXmppConnectionService, file);
 925    }
 926
 927    public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
 928
 929        final Avatar uncompressAvatar = getUncompressedAvatar(image);
 930        if (uncompressAvatar != null && uncompressAvatar.image.length() <= Config.AVATAR_CHAR_LIMIT) {
 931            return uncompressAvatar;
 932        }
 933        if (uncompressAvatar != null) {
 934            Log.d(Config.LOGTAG, "uncompressed avatar exceeded char limit by " + (uncompressAvatar.image.length() - Config.AVATAR_CHAR_LIMIT));
 935        }
 936
 937        Bitmap bm = cropCenterSquare(image, size);
 938        if (bm == null) {
 939            return null;
 940        }
 941        if (hasAlpha(bm)) {
 942            Log.d(Config.LOGTAG, "alpha in avatar detected; uploading as PNG");
 943            bm.recycle();
 944            bm = cropCenterSquare(image, 96);
 945            return getPepAvatar(bm, Bitmap.CompressFormat.PNG, 100);
 946        }
 947        return getPepAvatar(bm, format, 100);
 948    }
 949
 950    private Avatar getUncompressedAvatar(Uri uri) {
 951        Bitmap bitmap = null;
 952        try {
 953            bitmap = BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri));
 954            return getPepAvatar(bitmap, Bitmap.CompressFormat.PNG, 100);
 955        } catch (Exception e) {
 956            return null;
 957        } finally {
 958            if (bitmap != null) {
 959                bitmap.recycle();
 960            }
 961        }
 962    }
 963
 964    private Avatar getPepAvatar(Bitmap bitmap, Bitmap.CompressFormat format, int quality) {
 965        try {
 966            ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
 967            Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
 968            MessageDigest digest = MessageDigest.getInstance("SHA-1");
 969            DigestOutputStream mDigestOutputStream = new DigestOutputStream(mBase64OutputStream, digest);
 970            if (!bitmap.compress(format, quality, mDigestOutputStream)) {
 971                return null;
 972            }
 973            mDigestOutputStream.flush();
 974            mDigestOutputStream.close();
 975            long chars = mByteArrayOutputStream.size();
 976            if (format != Bitmap.CompressFormat.PNG && quality >= 50 && chars >= Config.AVATAR_CHAR_LIMIT) {
 977                int q = quality - 2;
 978                Log.d(Config.LOGTAG, "avatar char length was " + chars + " reducing quality to " + q);
 979                return getPepAvatar(bitmap, format, q);
 980            }
 981            Log.d(Config.LOGTAG, "settled on char length " + chars + " with quality=" + quality);
 982            final Avatar avatar = new Avatar();
 983            avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
 984            avatar.image = new String(mByteArrayOutputStream.toByteArray());
 985            if (format.equals(Bitmap.CompressFormat.WEBP)) {
 986                avatar.type = "image/webp";
 987            } else if (format.equals(Bitmap.CompressFormat.JPEG)) {
 988                avatar.type = "image/jpeg";
 989            } else if (format.equals(Bitmap.CompressFormat.PNG)) {
 990                avatar.type = "image/png";
 991            }
 992            avatar.width = bitmap.getWidth();
 993            avatar.height = bitmap.getHeight();
 994            return avatar;
 995        } catch (OutOfMemoryError e) {
 996            Log.d(Config.LOGTAG, "unable to convert avatar to base64 due to low memory");
 997            return null;
 998        } catch (Exception e) {
 999            return null;
1000        }
1001    }
1002
1003    public Avatar getStoredPepAvatar(String hash) {
1004        if (hash == null) {
1005            return null;
1006        }
1007        Avatar avatar = new Avatar();
1008        File file = new File(getAvatarPath(hash));
1009        FileInputStream is = null;
1010        try {
1011            avatar.size = file.length();
1012            BitmapFactory.Options options = new BitmapFactory.Options();
1013            options.inJustDecodeBounds = true;
1014            BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1015            is = new FileInputStream(file);
1016            ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
1017            Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
1018            MessageDigest digest = MessageDigest.getInstance("SHA-1");
1019            DigestOutputStream os = new DigestOutputStream(mBase64OutputStream, digest);
1020            byte[] buffer = new byte[4096];
1021            int length;
1022            while ((length = is.read(buffer)) > 0) {
1023                os.write(buffer, 0, length);
1024            }
1025            os.flush();
1026            os.close();
1027            avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
1028            avatar.image = new String(mByteArrayOutputStream.toByteArray());
1029            avatar.height = options.outHeight;
1030            avatar.width = options.outWidth;
1031            avatar.type = options.outMimeType;
1032            return avatar;
1033        } catch (NoSuchAlgorithmException | IOException e) {
1034            return null;
1035        } finally {
1036            close(is);
1037        }
1038    }
1039
1040    public boolean isAvatarCached(Avatar avatar) {
1041        File file = new File(getAvatarPath(avatar.getFilename()));
1042        return file.exists();
1043    }
1044
1045    public boolean save(final Avatar avatar) {
1046        File file;
1047        if (isAvatarCached(avatar)) {
1048            file = new File(getAvatarPath(avatar.getFilename()));
1049            avatar.size = file.length();
1050        } else {
1051            file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath() + "/" + UUID.randomUUID().toString());
1052            if (file.getParentFile().mkdirs()) {
1053                Log.d(Config.LOGTAG, "created cache directory");
1054            }
1055            OutputStream os = null;
1056            try {
1057                if (!file.createNewFile()) {
1058                    Log.d(Config.LOGTAG, "unable to create temporary file " + file.getAbsolutePath());
1059                }
1060                os = new FileOutputStream(file);
1061                MessageDigest digest = MessageDigest.getInstance("SHA-1");
1062                digest.reset();
1063                DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
1064                final byte[] bytes = avatar.getImageAsBytes();
1065                mDigestOutputStream.write(bytes);
1066                mDigestOutputStream.flush();
1067                mDigestOutputStream.close();
1068                String sha1sum = CryptoHelper.bytesToHex(digest.digest());
1069                if (sha1sum.equals(avatar.sha1sum)) {
1070                    File outputFile = new File(getAvatarPath(avatar.getFilename()));
1071                    if (outputFile.getParentFile().mkdirs()) {
1072                        Log.d(Config.LOGTAG, "created avatar directory");
1073                    }
1074                    String filename = getAvatarPath(avatar.getFilename());
1075                    if (!file.renameTo(new File(filename))) {
1076                        Log.d(Config.LOGTAG, "unable to rename " + file.getAbsolutePath() + " to " + outputFile);
1077                        return false;
1078                    }
1079                } else {
1080                    Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
1081                    if (!file.delete()) {
1082                        Log.d(Config.LOGTAG, "unable to delete temporary file");
1083                    }
1084                    return false;
1085                }
1086                avatar.size = bytes.length;
1087            } catch (IllegalArgumentException | IOException | NoSuchAlgorithmException e) {
1088                return false;
1089            } finally {
1090                close(os);
1091            }
1092        }
1093        return true;
1094    }
1095
1096    private String getAvatarPath(String avatar) {
1097        return mXmppConnectionService.getFilesDir().getAbsolutePath() + "/avatars/" + avatar;
1098    }
1099
1100    public Uri getAvatarUri(String avatar) {
1101        return Uri.parse("file:" + getAvatarPath(avatar));
1102    }
1103
1104    public Bitmap cropCenterSquare(Uri image, int size) {
1105        if (image == null) {
1106            return null;
1107        }
1108        InputStream is = null;
1109        try {
1110            BitmapFactory.Options options = new BitmapFactory.Options();
1111            options.inSampleSize = calcSampleSize(image, size);
1112            is = mXmppConnectionService.getContentResolver().openInputStream(image);
1113            if (is == null) {
1114                return null;
1115            }
1116            Bitmap input = BitmapFactory.decodeStream(is, null, options);
1117            if (input == null) {
1118                return null;
1119            } else {
1120                input = rotate(input, getRotation(image));
1121                return cropCenterSquare(input, size);
1122            }
1123        } catch (FileNotFoundException | SecurityException e) {
1124            Log.d(Config.LOGTAG, "unable to open file " + image.toString(), e);
1125            return null;
1126        } finally {
1127            close(is);
1128        }
1129    }
1130
1131    public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
1132        if (image == null) {
1133            return null;
1134        }
1135        InputStream is = null;
1136        try {
1137            BitmapFactory.Options options = new BitmapFactory.Options();
1138            options.inSampleSize = calcSampleSize(image, Math.max(newHeight, newWidth));
1139            is = mXmppConnectionService.getContentResolver().openInputStream(image);
1140            if (is == null) {
1141                return null;
1142            }
1143            Bitmap source = BitmapFactory.decodeStream(is, null, options);
1144            if (source == null) {
1145                return null;
1146            }
1147            int sourceWidth = source.getWidth();
1148            int sourceHeight = source.getHeight();
1149            float xScale = (float) newWidth / sourceWidth;
1150            float yScale = (float) newHeight / sourceHeight;
1151            float scale = Math.max(xScale, yScale);
1152            float scaledWidth = scale * sourceWidth;
1153            float scaledHeight = scale * sourceHeight;
1154            float left = (newWidth - scaledWidth) / 2;
1155            float top = (newHeight - scaledHeight) / 2;
1156
1157            RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
1158            Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
1159            Canvas canvas = new Canvas(dest);
1160            canvas.drawBitmap(source, null, targetRect, createAntiAliasingPaint());
1161            if (source.isRecycled()) {
1162                source.recycle();
1163            }
1164            return dest;
1165        } catch (SecurityException e) {
1166            return null; //android 6.0 with revoked permissions for example
1167        } catch (FileNotFoundException e) {
1168            return null;
1169        } finally {
1170            close(is);
1171        }
1172    }
1173
1174    public Bitmap cropCenterSquare(Bitmap input, int size) {
1175        int w = input.getWidth();
1176        int h = input.getHeight();
1177
1178        float scale = Math.max((float) size / h, (float) size / w);
1179
1180        float outWidth = scale * w;
1181        float outHeight = scale * h;
1182        float left = (size - outWidth) / 2;
1183        float top = (size - outHeight) / 2;
1184        RectF target = new RectF(left, top, left + outWidth, top + outHeight);
1185
1186        Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
1187        Canvas canvas = new Canvas(output);
1188        canvas.drawBitmap(input, null, target, createAntiAliasingPaint());
1189        if (!input.isRecycled()) {
1190            input.recycle();
1191        }
1192        return output;
1193    }
1194
1195    private int calcSampleSize(Uri image, int size) throws FileNotFoundException, SecurityException {
1196        BitmapFactory.Options options = new BitmapFactory.Options();
1197        options.inJustDecodeBounds = true;
1198        BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
1199        return calcSampleSize(options, size);
1200    }
1201
1202    public void updateFileParams(Message message) {
1203        updateFileParams(message, null);
1204    }
1205
1206    public void updateFileParams(Message message, URL url) {
1207        DownloadableFile file = getFile(message);
1208        final String mime = file.getMimeType();
1209        final boolean privateMessage = message.isPrivateMessage();
1210        final boolean image = message.getType() == Message.TYPE_IMAGE || (mime != null && mime.startsWith("image/"));
1211        final boolean video = mime != null && mime.startsWith("video/");
1212        final boolean audio = mime != null && mime.startsWith("audio/");
1213        final StringBuilder body = new StringBuilder();
1214        if (url != null) {
1215            body.append(url.toString());
1216        }
1217        body.append('|').append(file.getSize());
1218        if (image || video) {
1219            try {
1220                Dimensions dimensions = image ? getImageDimensions(file) : getVideoDimensions(file);
1221                if (dimensions.valid()) {
1222                    body.append('|').append(dimensions.width).append('|').append(dimensions.height);
1223                }
1224            } catch (NotAVideoFile notAVideoFile) {
1225                Log.d(Config.LOGTAG, "file with mime type " + file.getMimeType() + " was not a video file");
1226                //fall threw
1227            }
1228        } else if (audio) {
1229            body.append("|0|0|").append(getMediaRuntime(file));
1230        }
1231        message.setBody(body.toString());
1232        message.setDeleted(false);
1233        message.setType(privateMessage ? Message.TYPE_PRIVATE_FILE : (image ? Message.TYPE_IMAGE : Message.TYPE_FILE));
1234    }
1235
1236    private int getMediaRuntime(File file) {
1237        try {
1238            MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
1239            mediaMetadataRetriever.setDataSource(file.toString());
1240            return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
1241        } catch (RuntimeException e) {
1242            return 0;
1243        }
1244    }
1245
1246    private Dimensions getImageDimensions(File file) {
1247        BitmapFactory.Options options = new BitmapFactory.Options();
1248        options.inJustDecodeBounds = true;
1249        BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1250        int rotation = getRotation(file);
1251        boolean rotated = rotation == 90 || rotation == 270;
1252        int imageHeight = rotated ? options.outWidth : options.outHeight;
1253        int imageWidth = rotated ? options.outHeight : options.outWidth;
1254        return new Dimensions(imageHeight, imageWidth);
1255    }
1256
1257    private Dimensions getVideoDimensions(File file) throws NotAVideoFile {
1258        MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
1259        try {
1260            metadataRetriever.setDataSource(file.getAbsolutePath());
1261        } catch (RuntimeException e) {
1262            throw new NotAVideoFile(e);
1263        }
1264        return getVideoDimensions(metadataRetriever);
1265    }
1266
1267    public Bitmap getAvatar(String avatar, int size) {
1268        if (avatar == null) {
1269            return null;
1270        }
1271        Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
1272        if (bm == null) {
1273            return null;
1274        }
1275        return bm;
1276    }
1277
1278    public boolean isFileAvailable(Message message) {
1279        return getFile(message).exists();
1280    }
1281
1282    private static class Dimensions {
1283        public final int width;
1284        public final int height;
1285
1286        Dimensions(int height, int width) {
1287            this.width = width;
1288            this.height = height;
1289        }
1290
1291        public int getMin() {
1292            return Math.min(width, height);
1293        }
1294
1295        public boolean valid() {
1296            return width > 0 && height > 0;
1297        }
1298    }
1299
1300    private static class NotAVideoFile extends Exception {
1301        public NotAVideoFile(Throwable t) {
1302            super(t);
1303        }
1304
1305        public NotAVideoFile() {
1306            super();
1307        }
1308    }
1309
1310    public class FileCopyException extends Exception {
1311        private static final long serialVersionUID = -1010013599132881427L;
1312        private int resId;
1313
1314        public FileCopyException(int resId) {
1315            this.resId = resId;
1316        }
1317
1318        public int getResId() {
1319            return resId;
1320        }
1321    }
1322}