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.graphics.pdf.PdfRenderer;
  15import android.media.MediaMetadataRetriever;
  16import android.media.MediaScannerConnection;
  17import android.net.Uri;
  18import android.os.Build;
  19import android.os.Environment;
  20import android.os.ParcelFileDescriptor;
  21import android.provider.MediaStore;
  22import android.provider.OpenableColumns;
  23import android.support.annotation.RequiresApi;
  24import android.support.v4.content.FileProvider;
  25import android.system.Os;
  26import android.system.StructStat;
  27import android.util.Base64;
  28import android.util.Base64OutputStream;
  29import android.util.DisplayMetrics;
  30import android.util.Log;
  31import android.util.LruCache;
  32
  33import java.io.ByteArrayOutputStream;
  34import java.io.Closeable;
  35import java.io.File;
  36import java.io.FileDescriptor;
  37import java.io.FileInputStream;
  38import java.io.FileNotFoundException;
  39import java.io.FileOutputStream;
  40import java.io.IOException;
  41import java.io.InputStream;
  42import java.io.OutputStream;
  43import java.net.ServerSocket;
  44import java.net.Socket;
  45import java.net.URL;
  46import java.security.DigestOutputStream;
  47import java.security.MessageDigest;
  48import java.security.NoSuchAlgorithmException;
  49import java.text.SimpleDateFormat;
  50import java.util.ArrayList;
  51import java.util.Date;
  52import java.util.List;
  53import java.util.Locale;
  54import java.util.UUID;
  55
  56import eu.siacs.conversations.Config;
  57import eu.siacs.conversations.R;
  58import eu.siacs.conversations.entities.DownloadableFile;
  59import eu.siacs.conversations.entities.Message;
  60import eu.siacs.conversations.services.AttachFileToConversationRunnable;
  61import eu.siacs.conversations.services.XmppConnectionService;
  62import eu.siacs.conversations.ui.RecordingActivity;
  63import eu.siacs.conversations.ui.util.Attachment;
  64import eu.siacs.conversations.utils.Compatibility;
  65import eu.siacs.conversations.utils.CryptoHelper;
  66import eu.siacs.conversations.utils.ExifHelper;
  67import eu.siacs.conversations.utils.FileUtils;
  68import eu.siacs.conversations.utils.FileWriterException;
  69import eu.siacs.conversations.utils.MimeUtils;
  70import eu.siacs.conversations.xmpp.pep.Avatar;
  71
  72public class FileBackend {
  73
  74    private static final Object THUMBNAIL_LOCK = new Object();
  75
  76    private static final SimpleDateFormat IMAGE_DATE_FORMAT = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US);
  77
  78    private static final String FILE_PROVIDER = ".files";
  79    private static final float IGNORE_PADDING = 0.15f;
  80    private final XmppConnectionService mXmppConnectionService;
  81
  82    public FileBackend(XmppConnectionService service) {
  83        this.mXmppConnectionService = service;
  84    }
  85
  86    private static boolean isInDirectoryThatShouldNotBeScanned(Context context, File file) {
  87        return isInDirectoryThatShouldNotBeScanned(context, file.getAbsolutePath());
  88    }
  89
  90    public static boolean isInDirectoryThatShouldNotBeScanned(Context context, String path) {
  91        for (String type : new String[]{RecordingActivity.STORAGE_DIRECTORY_TYPE_NAME, "Files"}) {
  92            if (path.startsWith(getConversationsDirectory(context, type))) {
  93                return true;
  94            }
  95        }
  96        return false;
  97    }
  98
  99    public static long getFileSize(Context context, Uri uri) {
 100        try {
 101            final Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
 102            if (cursor != null && cursor.moveToFirst()) {
 103                long size = cursor.getLong(cursor.getColumnIndex(OpenableColumns.SIZE));
 104                cursor.close();
 105                return size;
 106            } else {
 107                return -1;
 108            }
 109        } catch (Exception e) {
 110            return -1;
 111        }
 112    }
 113
 114    public static boolean allFilesUnderSize(Context context, List<Attachment> attachments, long max) {
 115        final boolean compressVideo = !AttachFileToConversationRunnable.getVideoCompression(context).equals("uncompressed");
 116        if (max <= 0) {
 117            Log.d(Config.LOGTAG, "server did not report max file size for http upload");
 118            return true; //exception to be compatible with HTTP Upload < v0.2
 119        }
 120        for (Attachment attachment : attachments) {
 121            if (attachment.getType() != Attachment.Type.FILE) {
 122                continue;
 123            }
 124            String mime = attachment.getMime();
 125            if (mime != null && mime.startsWith("video/") && compressVideo) {
 126                try {
 127                    Dimensions dimensions = FileBackend.getVideoDimensions(context, attachment.getUri());
 128                    if (dimensions.getMin() > 720) {
 129                        Log.d(Config.LOGTAG, "do not consider video file with min width larger than 720 for size check");
 130                        continue;
 131                    }
 132                } catch (NotAVideoFile notAVideoFile) {
 133                    //ignore and fall through
 134                }
 135            }
 136            if (FileBackend.getFileSize(context, attachment.getUri()) > max) {
 137                Log.d(Config.LOGTAG, "not all files are under " + max + " bytes. suggesting falling back to jingle");
 138                return false;
 139            }
 140        }
 141        return true;
 142    }
 143
 144    public static String getConversationsDirectory(Context context, final String type) {
 145        if (Config.ONLY_INTERNAL_STORAGE) {
 146            return context.getFilesDir().getAbsolutePath() + "/" + type + "/";
 147        } else {
 148            return getAppMediaDirectory(context) + context.getString(R.string.app_name) + " " + type + "/";
 149        }
 150    }
 151
 152    public static String getAppMediaDirectory(Context context) {
 153        return Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + context.getString(R.string.app_name) + "/Media/";
 154    }
 155
 156    public static String getBackupDirectory(Context context) {
 157        return getBackupDirectory(context.getString(R.string.app_name));
 158    }
 159
 160    public static String getBackupDirectory(String app) {
 161        return Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + app + "/Backup/";
 162    }
 163
 164    private static Bitmap rotate(Bitmap bitmap, int degree) {
 165        if (degree == 0) {
 166            return bitmap;
 167        }
 168        int w = bitmap.getWidth();
 169        int h = bitmap.getHeight();
 170        Matrix mtx = new Matrix();
 171        mtx.postRotate(degree);
 172        Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
 173        if (bitmap != null && !bitmap.isRecycled()) {
 174            bitmap.recycle();
 175        }
 176        return result;
 177    }
 178
 179    public static boolean isPathBlacklisted(String path) {
 180        final String androidDataPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Android/data/";
 181        return path.startsWith(androidDataPath);
 182    }
 183
 184    private static Paint createAntiAliasingPaint() {
 185        Paint paint = new Paint();
 186        paint.setAntiAlias(true);
 187        paint.setFilterBitmap(true);
 188        paint.setDither(true);
 189        return paint;
 190    }
 191
 192    private static String getTakePhotoPath() {
 193        return Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) + "/Camera/";
 194    }
 195
 196    public static Uri getUriForUri(Context context, Uri uri) {
 197        if ("file".equals(uri.getScheme())) {
 198            return getUriForFile(context, new File(uri.getPath()));
 199        } else {
 200            return uri;
 201        }
 202    }
 203
 204    public static Uri getUriForFile(Context context, File file) {
 205        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N || Config.ONLY_INTERNAL_STORAGE) {
 206            try {
 207                return FileProvider.getUriForFile(context, getAuthority(context), file);
 208            } catch (IllegalArgumentException e) {
 209                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 210                    throw new SecurityException(e);
 211                } else {
 212                    return Uri.fromFile(file);
 213                }
 214            }
 215        } else {
 216            return Uri.fromFile(file);
 217        }
 218    }
 219
 220    public static String getAuthority(Context context) {
 221        return context.getPackageName() + FILE_PROVIDER;
 222    }
 223
 224    private static boolean hasAlpha(final Bitmap bitmap) {
 225        for (int x = 0; x < bitmap.getWidth(); ++x) {
 226            for (int y = 0; y < bitmap.getWidth(); ++y) {
 227                if (Color.alpha(bitmap.getPixel(x, y)) < 255) {
 228                    return true;
 229                }
 230            }
 231        }
 232        return false;
 233    }
 234
 235    private static int calcSampleSize(File image, int size) {
 236        BitmapFactory.Options options = new BitmapFactory.Options();
 237        options.inJustDecodeBounds = true;
 238        BitmapFactory.decodeFile(image.getAbsolutePath(), options);
 239        return calcSampleSize(options, size);
 240    }
 241
 242
 243    private static int calcSampleSize(BitmapFactory.Options options, int size) {
 244        int height = options.outHeight;
 245        int width = options.outWidth;
 246        int inSampleSize = 1;
 247
 248        if (height > size || width > size) {
 249            int halfHeight = height / 2;
 250            int halfWidth = width / 2;
 251
 252            while ((halfHeight / inSampleSize) > size
 253                    && (halfWidth / inSampleSize) > size) {
 254                inSampleSize *= 2;
 255            }
 256        }
 257        return inSampleSize;
 258    }
 259
 260    private static Dimensions getVideoDimensions(Context context, Uri uri) throws NotAVideoFile {
 261        MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
 262        try {
 263            mediaMetadataRetriever.setDataSource(context, uri);
 264        } catch (RuntimeException e) {
 265            throw new NotAVideoFile(e);
 266        }
 267        return getVideoDimensions(mediaMetadataRetriever);
 268    }
 269
 270    private static Dimensions getVideoDimensionsOfFrame(MediaMetadataRetriever mediaMetadataRetriever) {
 271        Bitmap bitmap = null;
 272        try {
 273            bitmap = mediaMetadataRetriever.getFrameAtTime();
 274            return new Dimensions(bitmap.getHeight(), bitmap.getWidth());
 275        } catch (Exception e) {
 276            return null;
 277        } finally {
 278            if (bitmap != null) {
 279                bitmap.recycle();
 280                ;
 281            }
 282        }
 283    }
 284
 285    private static Dimensions getVideoDimensions(MediaMetadataRetriever metadataRetriever) throws NotAVideoFile {
 286        String hasVideo = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_HAS_VIDEO);
 287        if (hasVideo == null) {
 288            throw new NotAVideoFile();
 289        }
 290        Dimensions dimensions = getVideoDimensionsOfFrame(metadataRetriever);
 291        if (dimensions != null) {
 292            return dimensions;
 293        }
 294        final int rotation;
 295        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1) {
 296            rotation = extractRotationFromMediaRetriever(metadataRetriever);
 297        } else {
 298            rotation = 0;
 299        }
 300        boolean rotated = rotation == 90 || rotation == 270;
 301        int height;
 302        try {
 303            String h = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
 304            height = Integer.parseInt(h);
 305        } catch (Exception e) {
 306            height = -1;
 307        }
 308        int width;
 309        try {
 310            String w = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
 311            width = Integer.parseInt(w);
 312        } catch (Exception e) {
 313            width = -1;
 314        }
 315        metadataRetriever.release();
 316        Log.d(Config.LOGTAG, "extracted video dims " + width + "x" + height);
 317        return rotated ? new Dimensions(width, height) : new Dimensions(height, width);
 318    }
 319
 320    @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR1)
 321    private static int extractRotationFromMediaRetriever(MediaMetadataRetriever metadataRetriever) {
 322        String r = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
 323        try {
 324            return Integer.parseInt(r);
 325        } catch (Exception e) {
 326            return 0;
 327        }
 328    }
 329
 330    public static void close(final Closeable stream) {
 331        if (stream != null) {
 332            try {
 333                stream.close();
 334            } catch (Exception e) {
 335                Log.d(Config.LOGTAG, "unable to close stream", e);
 336            }
 337        }
 338    }
 339
 340    public static void close(final Socket socket) {
 341        if (socket != null) {
 342            try {
 343                socket.close();
 344            } catch (IOException e) {
 345                Log.d(Config.LOGTAG, "unable to close socket", e);
 346            }
 347        }
 348    }
 349
 350    public static void close(final ServerSocket socket) {
 351        if (socket != null) {
 352            try {
 353                socket.close();
 354            } catch (IOException e) {
 355                Log.d(Config.LOGTAG, "unable to close server socket", e);
 356            }
 357        }
 358    }
 359
 360    public static boolean weOwnFile(Context context, Uri uri) {
 361        if (uri == null || !ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {
 362            return false;
 363        } else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
 364            return fileIsInFilesDir(context, uri);
 365        } else {
 366            return weOwnFileLollipop(uri);
 367        }
 368    }
 369
 370    /**
 371     * This is more than hacky but probably way better than doing nothing
 372     * Further 'optimizations' might contain to get the parents of CacheDir and NoBackupDir
 373     * and check against those as well
 374     */
 375    private static boolean fileIsInFilesDir(Context context, Uri uri) {
 376        try {
 377            final String haystack = context.getFilesDir().getParentFile().getCanonicalPath();
 378            final String needle = new File(uri.getPath()).getCanonicalPath();
 379            return needle.startsWith(haystack);
 380        } catch (IOException e) {
 381            return false;
 382        }
 383    }
 384
 385    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
 386    private static boolean weOwnFileLollipop(Uri uri) {
 387        try {
 388            File file = new File(uri.getPath());
 389            FileDescriptor fd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY).getFileDescriptor();
 390            StructStat st = Os.fstat(fd);
 391            return st.st_uid == android.os.Process.myUid();
 392        } catch (FileNotFoundException e) {
 393            return false;
 394        } catch (Exception e) {
 395            return true;
 396        }
 397    }
 398
 399    public static Uri getMediaUri(Context context, File file) {
 400        final String filePath = file.getAbsolutePath();
 401        final Cursor cursor;
 402        try {
 403            cursor = context.getContentResolver().query(
 404                    MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
 405                    new String[]{MediaStore.Images.Media._ID},
 406                    MediaStore.Images.Media.DATA + "=? ",
 407                    new String[]{filePath}, null);
 408        } catch (SecurityException e) {
 409            return null;
 410        }
 411        if (cursor != null && cursor.moveToFirst()) {
 412            final int id = cursor.getInt(cursor.getColumnIndex(MediaStore.MediaColumns._ID));
 413            cursor.close();
 414            return Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, String.valueOf(id));
 415        } else {
 416            return null;
 417        }
 418    }
 419
 420    public static void updateFileParams(Message message, URL url, long size) {
 421        final StringBuilder body = new StringBuilder();
 422        body.append(url.toString()).append('|').append(size);
 423        message.setBody(body.toString());
 424    }
 425
 426    public Bitmap getPreviewForUri(Attachment attachment, int size, boolean cacheOnly) {
 427        final String key = "attachment_" + attachment.getUuid().toString() + "_" + size;
 428        final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
 429        Bitmap bitmap = cache.get(key);
 430        if (bitmap != null || cacheOnly) {
 431            return bitmap;
 432        }
 433        final String mime = attachment.getMime();
 434        if ("application/pdf".equals(mime) && Compatibility.runsTwentyOne()) {
 435            bitmap = cropCenterSquarePdf(attachment.getUri(), size);
 436            drawOverlay(bitmap, paintOverlayBlackPdf(bitmap) ? R.drawable.open_pdf_black : R.drawable.open_pdf_white, 0.75f);
 437        } else if (mime != null && mime.startsWith("video/")) {
 438            bitmap = cropCenterSquareVideo(attachment.getUri(), size);
 439            drawOverlay(bitmap, paintOverlayBlack(bitmap) ? R.drawable.play_video_black : R.drawable.play_video_white, 0.75f);
 440        } else {
 441            bitmap = cropCenterSquare(attachment.getUri(), size);
 442            if (bitmap != null && "image/gif".equals(mime)) {
 443                Bitmap withGifOverlay = bitmap.copy(Bitmap.Config.ARGB_8888, true);
 444                drawOverlay(withGifOverlay, paintOverlayBlack(withGifOverlay) ? R.drawable.play_gif_black : R.drawable.play_gif_white, 1.0f);
 445                bitmap.recycle();
 446                bitmap = withGifOverlay;
 447            }
 448        }
 449        if (bitmap != null) {
 450            cache.put(key, bitmap);
 451        }
 452        return bitmap;
 453    }
 454
 455    private void createNoMedia(File diretory) {
 456        final File noMedia = new File(diretory, ".nomedia");
 457        if (!noMedia.exists()) {
 458            try {
 459                if (!noMedia.createNewFile()) {
 460                    Log.d(Config.LOGTAG, "created nomedia file " + noMedia.getAbsolutePath());
 461                }
 462            } catch (Exception e) {
 463                Log.d(Config.LOGTAG, "could not create nomedia file");
 464            }
 465        }
 466    }
 467
 468    public void updateMediaScanner(File file) {
 469        updateMediaScanner(file, null);
 470    }
 471
 472    public void updateMediaScanner(File file, final Runnable callback) {
 473        if (!isInDirectoryThatShouldNotBeScanned(mXmppConnectionService, file)) {
 474            MediaScannerConnection.scanFile(mXmppConnectionService, new String[]{file.getAbsolutePath()}, null, new MediaScannerConnection.MediaScannerConnectionClient() {
 475                @Override
 476                public void onMediaScannerConnected() {
 477
 478                }
 479
 480                @Override
 481                public void onScanCompleted(String path, Uri uri) {
 482                    if (callback != null && file.getAbsolutePath().equals(path)) {
 483                        callback.run();
 484                    } else {
 485                        Log.d(Config.LOGTAG, "media scanner scanned wrong file");
 486                        if (callback != null) {
 487                            callback.run();
 488                        }
 489                    }
 490                }
 491            });
 492            return;
 493            /*Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
 494            intent.setData(Uri.fromFile(file));
 495            mXmppConnectionService.sendBroadcast(intent);*/
 496        } else if (file.getAbsolutePath().startsWith(getAppMediaDirectory(mXmppConnectionService))) {
 497            createNoMedia(file.getParentFile());
 498        }
 499        if (callback != null) {
 500            callback.run();
 501        }
 502    }
 503
 504    public boolean deleteFile(Message message) {
 505        File file = getFile(message);
 506        if (file.delete()) {
 507            updateMediaScanner(file);
 508            return true;
 509        } else {
 510            return false;
 511        }
 512    }
 513
 514    public DownloadableFile getFile(Message message) {
 515        return getFile(message, true);
 516    }
 517
 518
 519    public DownloadableFile getFileForPath(String path) {
 520        return getFileForPath(path, MimeUtils.guessMimeTypeFromExtension(MimeUtils.extractRelevantExtension(path)));
 521    }
 522
 523    public DownloadableFile getFileForPath(String path, String mime) {
 524        final DownloadableFile file;
 525        if (path.startsWith("/")) {
 526            file = new DownloadableFile(path);
 527        } else {
 528            if (mime != null && mime.startsWith("image/")) {
 529                file = new DownloadableFile(getConversationsDirectory("Images") + path);
 530            } else if (mime != null && mime.startsWith("video/")) {
 531                file = new DownloadableFile(getConversationsDirectory("Videos") + path);
 532            } else {
 533                file = new DownloadableFile(getConversationsDirectory("Files") + path);
 534            }
 535        }
 536        return file;
 537    }
 538
 539    public boolean isInternalFile(final File file) {
 540        final File internalFile = getFileForPath(file.getName());
 541        return file.getAbsolutePath().equals(internalFile.getAbsolutePath());
 542    }
 543
 544    public DownloadableFile getFile(Message message, boolean decrypted) {
 545        final boolean encrypted = !decrypted
 546                && (message.getEncryption() == Message.ENCRYPTION_PGP
 547                || message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
 548        String path = message.getRelativeFilePath();
 549        if (path == null) {
 550            path = message.getUuid();
 551        }
 552        final DownloadableFile file = getFileForPath(path, message.getMimeType());
 553        if (encrypted) {
 554            return new DownloadableFile(getConversationsDirectory("Files") + file.getName() + ".pgp");
 555        } else {
 556            return file;
 557        }
 558    }
 559
 560    public List<Attachment> convertToAttachments(List<DatabaseBackend.FilePath> relativeFilePaths) {
 561        List<Attachment> attachments = new ArrayList<>();
 562        for (DatabaseBackend.FilePath relativeFilePath : relativeFilePaths) {
 563            final String mime = MimeUtils.guessMimeTypeFromExtension(MimeUtils.extractRelevantExtension(relativeFilePath.path));
 564            final File file = getFileForPath(relativeFilePath.path, mime);
 565            attachments.add(Attachment.of(relativeFilePath.uuid, file, mime));
 566        }
 567        return attachments;
 568    }
 569
 570    private String getConversationsDirectory(final String type) {
 571        return getConversationsDirectory(mXmppConnectionService, type);
 572    }
 573
 574    private Bitmap resize(final Bitmap originalBitmap, int size) throws IOException {
 575        int w = originalBitmap.getWidth();
 576        int h = originalBitmap.getHeight();
 577        if (w <= 0 || h <= 0) {
 578            throw new IOException("Decoded bitmap reported bounds smaller 0");
 579        } else if (Math.max(w, h) > size) {
 580            int scalledW;
 581            int scalledH;
 582            if (w <= h) {
 583                scalledW = Math.max((int) (w / ((double) h / size)), 1);
 584                scalledH = size;
 585            } else {
 586                scalledW = size;
 587                scalledH = Math.max((int) (h / ((double) w / size)), 1);
 588            }
 589            final Bitmap result = Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
 590            if (!originalBitmap.isRecycled()) {
 591                originalBitmap.recycle();
 592            }
 593            return result;
 594        } else {
 595            return originalBitmap;
 596        }
 597    }
 598
 599    public boolean useImageAsIs(Uri uri) {
 600        String path = getOriginalPath(uri);
 601        if (path == null || isPathBlacklisted(path)) {
 602            return false;
 603        }
 604        File file = new File(path);
 605        long size = file.length();
 606        if (size == 0 || size >= mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize)) {
 607            return false;
 608        }
 609        BitmapFactory.Options options = new BitmapFactory.Options();
 610        options.inJustDecodeBounds = true;
 611        try {
 612            BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri), null, options);
 613            if (options.outMimeType == null || options.outHeight <= 0 || options.outWidth <= 0) {
 614                return false;
 615            }
 616            return (options.outWidth <= Config.IMAGE_SIZE && options.outHeight <= Config.IMAGE_SIZE && options.outMimeType.contains(Config.IMAGE_FORMAT.name().toLowerCase()));
 617        } catch (FileNotFoundException e) {
 618            return false;
 619        }
 620    }
 621
 622    public String getOriginalPath(Uri uri) {
 623        return FileUtils.getPath(mXmppConnectionService, uri);
 624    }
 625
 626    private void copyFileToPrivateStorage(File file, Uri uri) throws FileCopyException {
 627        Log.d(Config.LOGTAG, "copy file (" + uri.toString() + ") to private storage " + file.getAbsolutePath());
 628        file.getParentFile().mkdirs();
 629        OutputStream os = null;
 630        InputStream is = null;
 631        try {
 632            file.createNewFile();
 633            os = new FileOutputStream(file);
 634            is = mXmppConnectionService.getContentResolver().openInputStream(uri);
 635            byte[] buffer = new byte[1024];
 636            int length;
 637            while ((length = is.read(buffer)) > 0) {
 638                try {
 639                    os.write(buffer, 0, length);
 640                } catch (IOException e) {
 641                    throw new FileWriterException();
 642                }
 643            }
 644            try {
 645                os.flush();
 646            } catch (IOException e) {
 647                throw new FileWriterException();
 648            }
 649        } catch (FileNotFoundException e) {
 650            throw new FileCopyException(R.string.error_file_not_found);
 651        } catch (FileWriterException e) {
 652            throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
 653        } catch (IOException e) {
 654            e.printStackTrace();
 655            throw new FileCopyException(R.string.error_io_exception);
 656        } finally {
 657            close(os);
 658            close(is);
 659        }
 660    }
 661
 662    public void copyFileToPrivateStorage(Message message, Uri uri, String type) throws FileCopyException {
 663        String mime = MimeUtils.guessMimeTypeFromUriAndMime(mXmppConnectionService, uri, type);
 664        Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage (mime=" + mime + ")");
 665        String extension = MimeUtils.guessExtensionFromMimeType(mime);
 666        if (extension == null) {
 667            Log.d(Config.LOGTAG, "extension from mime type was null");
 668            extension = getExtensionFromUri(uri);
 669        }
 670        if ("ogg".equals(extension) && type != null && type.startsWith("audio/")) {
 671            extension = "oga";
 672        }
 673        message.setRelativeFilePath(message.getUuid() + "." + extension);
 674        copyFileToPrivateStorage(mXmppConnectionService.getFileBackend().getFile(message), uri);
 675    }
 676
 677    private String getExtensionFromUri(Uri uri) {
 678        String[] projection = {MediaStore.MediaColumns.DATA};
 679        String filename = null;
 680        Cursor cursor;
 681        try {
 682            cursor = mXmppConnectionService.getContentResolver().query(uri, projection, null, null, null);
 683        } catch (IllegalArgumentException e) {
 684            cursor = null;
 685        }
 686        if (cursor != null) {
 687            try {
 688                if (cursor.moveToFirst()) {
 689                    filename = cursor.getString(0);
 690                }
 691            } catch (Exception e) {
 692                filename = null;
 693            } finally {
 694                cursor.close();
 695            }
 696        }
 697        if (filename == null) {
 698            final List<String> segments = uri.getPathSegments();
 699            if (segments.size() > 0) {
 700                filename = segments.get(segments.size() - 1);
 701            }
 702        }
 703        int pos = filename == null ? -1 : filename.lastIndexOf('.');
 704        return pos > 0 ? filename.substring(pos + 1) : null;
 705    }
 706
 707    private void copyImageToPrivateStorage(File file, Uri image, int sampleSize) throws FileCopyException, NotAnImageFileException {
 708        file.getParentFile().mkdirs();
 709        InputStream is = null;
 710        OutputStream os = null;
 711        try {
 712            if (!file.exists() && !file.createNewFile()) {
 713                throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
 714            }
 715            is = mXmppConnectionService.getContentResolver().openInputStream(image);
 716            if (is == null) {
 717                throw new FileCopyException(R.string.error_not_an_image_file);
 718            }
 719            Bitmap originalBitmap;
 720            BitmapFactory.Options options = new BitmapFactory.Options();
 721            int inSampleSize = (int) Math.pow(2, sampleSize);
 722            Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
 723            options.inSampleSize = inSampleSize;
 724            originalBitmap = BitmapFactory.decodeStream(is, null, options);
 725            is.close();
 726            if (originalBitmap == null) {
 727                throw new NotAnImageFileException();
 728            }
 729            Bitmap scaledBitmap = resize(originalBitmap, Config.IMAGE_SIZE);
 730            int rotation = getRotation(image);
 731            scaledBitmap = rotate(scaledBitmap, rotation);
 732            boolean targetSizeReached = false;
 733            int quality = Config.IMAGE_QUALITY;
 734            final int imageMaxSize = mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize);
 735            while (!targetSizeReached) {
 736                os = new FileOutputStream(file);
 737                boolean success = scaledBitmap.compress(Config.IMAGE_FORMAT, quality, os);
 738                if (!success) {
 739                    throw new FileCopyException(R.string.error_compressing_image);
 740                }
 741                os.flush();
 742                targetSizeReached = file.length() <= imageMaxSize || quality <= 50;
 743                quality -= 5;
 744            }
 745            scaledBitmap.recycle();
 746        } catch (FileNotFoundException e) {
 747            throw new FileCopyException(R.string.error_file_not_found);
 748        } catch (IOException e) {
 749            e.printStackTrace();
 750            throw new FileCopyException(R.string.error_io_exception);
 751        } catch (SecurityException e) {
 752            throw new FileCopyException(R.string.error_security_exception_during_image_copy);
 753        } catch (OutOfMemoryError e) {
 754            ++sampleSize;
 755            if (sampleSize <= 3) {
 756                copyImageToPrivateStorage(file, image, sampleSize);
 757            } else {
 758                throw new FileCopyException(R.string.error_out_of_memory);
 759            }
 760        } finally {
 761            close(os);
 762            close(is);
 763        }
 764    }
 765
 766    public void copyImageToPrivateStorage(File file, Uri image) throws FileCopyException, NotAnImageFileException {
 767        Log.d(Config.LOGTAG, "copy image (" + image.toString() + ") to private storage " + file.getAbsolutePath());
 768        copyImageToPrivateStorage(file, image, 0);
 769    }
 770
 771    public void copyImageToPrivateStorage(Message message, Uri image) throws FileCopyException, NotAnImageFileException {
 772        switch (Config.IMAGE_FORMAT) {
 773            case JPEG:
 774                message.setRelativeFilePath(message.getUuid() + ".jpg");
 775                break;
 776            case PNG:
 777                message.setRelativeFilePath(message.getUuid() + ".png");
 778                break;
 779            case WEBP:
 780                message.setRelativeFilePath(message.getUuid() + ".webp");
 781                break;
 782        }
 783        copyImageToPrivateStorage(getFile(message), image);
 784        updateFileParams(message);
 785    }
 786
 787    public boolean unusualBounds(Uri image) {
 788        try {
 789            BitmapFactory.Options options = new BitmapFactory.Options();
 790            options.inJustDecodeBounds = true;
 791            BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
 792            float ratio = (float) options.outHeight / options.outWidth;
 793            return ratio > (21.0f / 9.0f) || ratio < (9.0f / 21.0f);
 794        } catch (Exception e) {
 795            return false;
 796        }
 797    }
 798
 799    private int getRotation(File file) {
 800        return getRotation(Uri.parse("file://" + file.getAbsolutePath()));
 801    }
 802
 803    private int getRotation(Uri image) {
 804        InputStream is = null;
 805        try {
 806            is = mXmppConnectionService.getContentResolver().openInputStream(image);
 807            return ExifHelper.getOrientation(is);
 808        } catch (FileNotFoundException e) {
 809            return 0;
 810        } finally {
 811            close(is);
 812        }
 813    }
 814
 815    public Bitmap getThumbnail(Message message, int size, boolean cacheOnly) throws IOException {
 816        final String uuid = message.getUuid();
 817        final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
 818        Bitmap thumbnail = cache.get(uuid);
 819        if ((thumbnail == null) && (!cacheOnly)) {
 820            synchronized (THUMBNAIL_LOCK) {
 821                thumbnail = cache.get(uuid);
 822                if (thumbnail != null) {
 823                    return thumbnail;
 824                }
 825                DownloadableFile file = getFile(message);
 826                final String mime = file.getMimeType();
 827                if ("application/pdf".equals(mime) && Compatibility.runsTwentyOne()) {
 828                    thumbnail = getPdfDocumentPreview(file, size);
 829                } else if (mime.startsWith("video/")) {
 830                    thumbnail = getVideoPreview(file, size);
 831                } else {
 832                    Bitmap fullsize = getFullSizeImagePreview(file, size);
 833                    if (fullsize == null) {
 834                        throw new FileNotFoundException();
 835                    }
 836                    thumbnail = resize(fullsize, size);
 837                    thumbnail = rotate(thumbnail, getRotation(file));
 838                    if (mime.equals("image/gif")) {
 839                        Bitmap withGifOverlay = thumbnail.copy(Bitmap.Config.ARGB_8888, true);
 840                        drawOverlay(withGifOverlay, paintOverlayBlack(withGifOverlay) ? R.drawable.play_gif_black : R.drawable.play_gif_white, 1.0f);
 841                        thumbnail.recycle();
 842                        thumbnail = withGifOverlay;
 843                    }
 844                }
 845                cache.put(uuid, thumbnail);
 846            }
 847        }
 848        return thumbnail;
 849    }
 850
 851    private Bitmap getFullSizeImagePreview(File file, int size) {
 852        BitmapFactory.Options options = new BitmapFactory.Options();
 853        options.inSampleSize = calcSampleSize(file, size);
 854        try {
 855            return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 856        } catch (OutOfMemoryError e) {
 857            options.inSampleSize *= 2;
 858            return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 859        }
 860    }
 861
 862    private void drawOverlay(Bitmap bitmap, int resource, float factor) {
 863        Bitmap overlay = BitmapFactory.decodeResource(mXmppConnectionService.getResources(), resource);
 864        Canvas canvas = new Canvas(bitmap);
 865        float targetSize = Math.min(canvas.getWidth(), canvas.getHeight()) * factor;
 866        Log.d(Config.LOGTAG, "target size overlay: " + targetSize + " overlay bitmap size was " + overlay.getHeight());
 867        float left = (canvas.getWidth() - targetSize) / 2.0f;
 868        float top = (canvas.getHeight() - targetSize) / 2.0f;
 869        RectF dst = new RectF(left, top, left + targetSize - 1, top + targetSize - 1);
 870        canvas.drawBitmap(overlay, null, dst, createAntiAliasingPaint());
 871    }
 872
 873    /**
 874     * https://stackoverflow.com/a/3943023/210897
 875     */
 876    private boolean paintOverlayBlack(final Bitmap bitmap) {
 877        final int h = bitmap.getHeight();
 878        final int w = bitmap.getWidth();
 879        int record = 0;
 880        for (int y = Math.round(h * IGNORE_PADDING); y < h - Math.round(h * IGNORE_PADDING); ++y) {
 881            for (int x = Math.round(w * IGNORE_PADDING); x < w - Math.round(w * IGNORE_PADDING); ++x) {
 882                int pixel = bitmap.getPixel(x, y);
 883                if ((Color.red(pixel) * 0.299 + Color.green(pixel) * 0.587 + Color.blue(pixel) * 0.114) > 186) {
 884                    --record;
 885                } else {
 886                    ++record;
 887                }
 888            }
 889        }
 890        return record < 0;
 891    }
 892
 893    private boolean paintOverlayBlackPdf(final Bitmap bitmap) {
 894        final int h = bitmap.getHeight();
 895        final int w = bitmap.getWidth();
 896        int white = 0;
 897        for (int y = 0; y < h; ++y) {
 898            for (int x = 0; x < w; ++x) {
 899                int pixel = bitmap.getPixel(x, y);
 900                if ((Color.red(pixel) * 0.299 + Color.green(pixel) * 0.587 + Color.blue(pixel) * 0.114) > 186) {
 901                    white++;
 902                }
 903            }
 904        }
 905        return white > (h * w * 0.4f);
 906    }
 907
 908    private Bitmap cropCenterSquareVideo(Uri uri, int size) {
 909        MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
 910        Bitmap frame;
 911        try {
 912            metadataRetriever.setDataSource(mXmppConnectionService, uri);
 913            frame = metadataRetriever.getFrameAtTime(0);
 914            metadataRetriever.release();
 915            return cropCenterSquare(frame, size);
 916        } catch (Exception e) {
 917            frame = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 918            frame.eraseColor(0xff000000);
 919            return frame;
 920        }
 921    }
 922
 923    private Bitmap getVideoPreview(final File file, final int size) {
 924        final MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
 925        Bitmap frame;
 926        try {
 927            metadataRetriever.setDataSource(file.getAbsolutePath());
 928            frame = metadataRetriever.getFrameAtTime(0);
 929            metadataRetriever.release();
 930            frame = resize(frame, size);
 931        } catch (IOException | RuntimeException e) {
 932            frame = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 933            frame.eraseColor(0xff000000);
 934        }
 935        drawOverlay(frame, paintOverlayBlack(frame) ? R.drawable.play_video_black : R.drawable.play_video_white, 0.75f);
 936        return frame;
 937    }
 938
 939    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
 940    private Bitmap getPdfDocumentPreview(final File file, final int size) {
 941        try {
 942            final ParcelFileDescriptor fileDescriptor = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
 943            final Bitmap rendered = renderPdfDocument(fileDescriptor, size, true);
 944            drawOverlay(rendered, paintOverlayBlackPdf(rendered) ? R.drawable.open_pdf_black : R.drawable.open_pdf_white, 0.75f);
 945            return rendered;
 946        } catch (final IOException | SecurityException e) {
 947            Log.d(Config.LOGTAG, "unable to render PDF document preview", e);
 948            final Bitmap placeholder = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 949            placeholder.eraseColor(0xff000000);
 950            return placeholder;
 951        }
 952    }
 953
 954
 955    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
 956    private Bitmap cropCenterSquarePdf(final Uri uri, final int size) {
 957        try {
 958            ParcelFileDescriptor fileDescriptor = mXmppConnectionService.getContentResolver().openFileDescriptor(uri, "r");
 959            final Bitmap bitmap = renderPdfDocument(fileDescriptor, size, false);
 960            return cropCenterSquare(bitmap, size);
 961        } catch (Exception e) {
 962            final Bitmap placeholder = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 963            placeholder.eraseColor(0xff000000);
 964            return placeholder;
 965        }
 966    }
 967
 968    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
 969    private Bitmap renderPdfDocument(ParcelFileDescriptor fileDescriptor, int targetSize, boolean fit) throws IOException {
 970        final PdfRenderer pdfRenderer = new PdfRenderer(fileDescriptor);
 971        final PdfRenderer.Page page = pdfRenderer.openPage(0);
 972        final Dimensions dimensions = scalePdfDimensions(new Dimensions(page.getHeight(), page.getWidth()), targetSize, fit);
 973        final Bitmap rendered = Bitmap.createBitmap(dimensions.width, dimensions.height, Bitmap.Config.ARGB_8888);
 974        rendered.eraseColor(0xffffffff);
 975        page.render(rendered, null, null, PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY);
 976        page.close();
 977        pdfRenderer.close();
 978        fileDescriptor.close();
 979        return rendered;
 980    }
 981
 982    public Uri getTakePhotoUri() {
 983        File file;
 984        if (Config.ONLY_INTERNAL_STORAGE) {
 985            file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath(), "Camera/IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
 986        } else {
 987            file = new File(getTakePhotoPath() + "IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
 988        }
 989        file.getParentFile().mkdirs();
 990        return getUriForFile(mXmppConnectionService, file);
 991    }
 992
 993    public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
 994
 995        final Avatar uncompressAvatar = getUncompressedAvatar(image);
 996        if (uncompressAvatar != null && uncompressAvatar.image.length() <= Config.AVATAR_CHAR_LIMIT) {
 997            return uncompressAvatar;
 998        }
 999        if (uncompressAvatar != null) {
1000            Log.d(Config.LOGTAG, "uncompressed avatar exceeded char limit by " + (uncompressAvatar.image.length() - Config.AVATAR_CHAR_LIMIT));
1001        }
1002
1003        Bitmap bm = cropCenterSquare(image, size);
1004        if (bm == null) {
1005            return null;
1006        }
1007        if (hasAlpha(bm)) {
1008            Log.d(Config.LOGTAG, "alpha in avatar detected; uploading as PNG");
1009            bm.recycle();
1010            bm = cropCenterSquare(image, 96);
1011            return getPepAvatar(bm, Bitmap.CompressFormat.PNG, 100);
1012        }
1013        return getPepAvatar(bm, format, 100);
1014    }
1015
1016    private Avatar getUncompressedAvatar(Uri uri) {
1017        Bitmap bitmap = null;
1018        try {
1019            bitmap = BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri));
1020            return getPepAvatar(bitmap, Bitmap.CompressFormat.PNG, 100);
1021        } catch (Exception e) {
1022            return null;
1023        } finally {
1024            if (bitmap != null) {
1025                bitmap.recycle();
1026            }
1027        }
1028    }
1029
1030    private Avatar getPepAvatar(Bitmap bitmap, Bitmap.CompressFormat format, int quality) {
1031        try {
1032            ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
1033            Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
1034            MessageDigest digest = MessageDigest.getInstance("SHA-1");
1035            DigestOutputStream mDigestOutputStream = new DigestOutputStream(mBase64OutputStream, digest);
1036            if (!bitmap.compress(format, quality, mDigestOutputStream)) {
1037                return null;
1038            }
1039            mDigestOutputStream.flush();
1040            mDigestOutputStream.close();
1041            long chars = mByteArrayOutputStream.size();
1042            if (format != Bitmap.CompressFormat.PNG && quality >= 50 && chars >= Config.AVATAR_CHAR_LIMIT) {
1043                int q = quality - 2;
1044                Log.d(Config.LOGTAG, "avatar char length was " + chars + " reducing quality to " + q);
1045                return getPepAvatar(bitmap, format, q);
1046            }
1047            Log.d(Config.LOGTAG, "settled on char length " + chars + " with quality=" + quality);
1048            final Avatar avatar = new Avatar();
1049            avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
1050            avatar.image = new String(mByteArrayOutputStream.toByteArray());
1051            if (format.equals(Bitmap.CompressFormat.WEBP)) {
1052                avatar.type = "image/webp";
1053            } else if (format.equals(Bitmap.CompressFormat.JPEG)) {
1054                avatar.type = "image/jpeg";
1055            } else if (format.equals(Bitmap.CompressFormat.PNG)) {
1056                avatar.type = "image/png";
1057            }
1058            avatar.width = bitmap.getWidth();
1059            avatar.height = bitmap.getHeight();
1060            return avatar;
1061        } catch (OutOfMemoryError e) {
1062            Log.d(Config.LOGTAG, "unable to convert avatar to base64 due to low memory");
1063            return null;
1064        } catch (Exception e) {
1065            return null;
1066        }
1067    }
1068
1069    public Avatar getStoredPepAvatar(String hash) {
1070        if (hash == null) {
1071            return null;
1072        }
1073        Avatar avatar = new Avatar();
1074        final File file = getAvatarFile(hash);
1075        FileInputStream is = null;
1076        try {
1077            avatar.size = file.length();
1078            BitmapFactory.Options options = new BitmapFactory.Options();
1079            options.inJustDecodeBounds = true;
1080            BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1081            is = new FileInputStream(file);
1082            ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
1083            Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
1084            MessageDigest digest = MessageDigest.getInstance("SHA-1");
1085            DigestOutputStream os = new DigestOutputStream(mBase64OutputStream, digest);
1086            byte[] buffer = new byte[4096];
1087            int length;
1088            while ((length = is.read(buffer)) > 0) {
1089                os.write(buffer, 0, length);
1090            }
1091            os.flush();
1092            os.close();
1093            avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
1094            avatar.image = new String(mByteArrayOutputStream.toByteArray());
1095            avatar.height = options.outHeight;
1096            avatar.width = options.outWidth;
1097            avatar.type = options.outMimeType;
1098            return avatar;
1099        } catch (NoSuchAlgorithmException | IOException e) {
1100            return null;
1101        } finally {
1102            close(is);
1103        }
1104    }
1105
1106    public boolean isAvatarCached(Avatar avatar) {
1107        final File file = getAvatarFile(avatar.getFilename());
1108        return file.exists();
1109    }
1110
1111    public boolean save(final Avatar avatar) {
1112        File file;
1113        if (isAvatarCached(avatar)) {
1114            file = getAvatarFile(avatar.getFilename());
1115            avatar.size = file.length();
1116        } else {
1117            file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath() + "/" + UUID.randomUUID().toString());
1118            if (file.getParentFile().mkdirs()) {
1119                Log.d(Config.LOGTAG, "created cache directory");
1120            }
1121            OutputStream os = null;
1122            try {
1123                if (!file.createNewFile()) {
1124                    Log.d(Config.LOGTAG, "unable to create temporary file " + file.getAbsolutePath());
1125                }
1126                os = new FileOutputStream(file);
1127                MessageDigest digest = MessageDigest.getInstance("SHA-1");
1128                digest.reset();
1129                DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
1130                final byte[] bytes = avatar.getImageAsBytes();
1131                mDigestOutputStream.write(bytes);
1132                mDigestOutputStream.flush();
1133                mDigestOutputStream.close();
1134                String sha1sum = CryptoHelper.bytesToHex(digest.digest());
1135                if (sha1sum.equals(avatar.sha1sum)) {
1136                    final File outputFile = getAvatarFile(avatar.getFilename());
1137                    if (outputFile.getParentFile().mkdirs()) {
1138                        Log.d(Config.LOGTAG, "created avatar directory");
1139                    }
1140                    final File avatarFile = getAvatarFile(avatar.getFilename());
1141                    if (!file.renameTo(avatarFile)) {
1142                        Log.d(Config.LOGTAG, "unable to rename " + file.getAbsolutePath() + " to " + outputFile);
1143                        return false;
1144                    }
1145                } else {
1146                    Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
1147                    if (!file.delete()) {
1148                        Log.d(Config.LOGTAG, "unable to delete temporary file");
1149                    }
1150                    return false;
1151                }
1152                avatar.size = bytes.length;
1153            } catch (IllegalArgumentException | IOException | NoSuchAlgorithmException e) {
1154                return false;
1155            } finally {
1156                close(os);
1157            }
1158        }
1159        return true;
1160    }
1161
1162    public void deleteHistoricAvatarPath() {
1163        delete(getHistoricAvatarPath());
1164    }
1165
1166    private void delete(final File file) {
1167        if (file.isDirectory()) {
1168            final File[] files = file.listFiles();
1169            if (files != null) {
1170                for (final File f : files) {
1171                    delete(f);
1172                }
1173            }
1174        }
1175        if (file.delete()) {
1176            Log.d(Config.LOGTAG,"deleted "+file.getAbsolutePath());
1177        }
1178    }
1179
1180    private File getHistoricAvatarPath() {
1181        return new File(mXmppConnectionService.getFilesDir(), "/avatars/");
1182    }
1183
1184    private File getAvatarFile(String avatar) {
1185        return new File(mXmppConnectionService.getCacheDir(), "/avatars/" + avatar);
1186    }
1187
1188    public Uri getAvatarUri(String avatar) {
1189        return Uri.fromFile(getAvatarFile(avatar));
1190    }
1191
1192    public Bitmap cropCenterSquare(Uri image, int size) {
1193        if (image == null) {
1194            return null;
1195        }
1196        InputStream is = null;
1197        try {
1198            BitmapFactory.Options options = new BitmapFactory.Options();
1199            options.inSampleSize = calcSampleSize(image, size);
1200            is = mXmppConnectionService.getContentResolver().openInputStream(image);
1201            if (is == null) {
1202                return null;
1203            }
1204            Bitmap input = BitmapFactory.decodeStream(is, null, options);
1205            if (input == null) {
1206                return null;
1207            } else {
1208                input = rotate(input, getRotation(image));
1209                return cropCenterSquare(input, size);
1210            }
1211        } catch (FileNotFoundException | SecurityException e) {
1212            Log.d(Config.LOGTAG, "unable to open file " + image.toString(), e);
1213            return null;
1214        } finally {
1215            close(is);
1216        }
1217    }
1218
1219    public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
1220        if (image == null) {
1221            return null;
1222        }
1223        InputStream is = null;
1224        try {
1225            BitmapFactory.Options options = new BitmapFactory.Options();
1226            options.inSampleSize = calcSampleSize(image, Math.max(newHeight, newWidth));
1227            is = mXmppConnectionService.getContentResolver().openInputStream(image);
1228            if (is == null) {
1229                return null;
1230            }
1231            Bitmap source = BitmapFactory.decodeStream(is, null, options);
1232            if (source == null) {
1233                return null;
1234            }
1235            int sourceWidth = source.getWidth();
1236            int sourceHeight = source.getHeight();
1237            float xScale = (float) newWidth / sourceWidth;
1238            float yScale = (float) newHeight / sourceHeight;
1239            float scale = Math.max(xScale, yScale);
1240            float scaledWidth = scale * sourceWidth;
1241            float scaledHeight = scale * sourceHeight;
1242            float left = (newWidth - scaledWidth) / 2;
1243            float top = (newHeight - scaledHeight) / 2;
1244
1245            RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
1246            Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
1247            Canvas canvas = new Canvas(dest);
1248            canvas.drawBitmap(source, null, targetRect, createAntiAliasingPaint());
1249            if (source.isRecycled()) {
1250                source.recycle();
1251            }
1252            return dest;
1253        } catch (SecurityException e) {
1254            return null; //android 6.0 with revoked permissions for example
1255        } catch (FileNotFoundException e) {
1256            return null;
1257        } finally {
1258            close(is);
1259        }
1260    }
1261
1262    public Bitmap cropCenterSquare(Bitmap input, int size) {
1263        int w = input.getWidth();
1264        int h = input.getHeight();
1265
1266        float scale = Math.max((float) size / h, (float) size / w);
1267
1268        float outWidth = scale * w;
1269        float outHeight = scale * h;
1270        float left = (size - outWidth) / 2;
1271        float top = (size - outHeight) / 2;
1272        RectF target = new RectF(left, top, left + outWidth, top + outHeight);
1273
1274        Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
1275        Canvas canvas = new Canvas(output);
1276        canvas.drawBitmap(input, null, target, createAntiAliasingPaint());
1277        if (!input.isRecycled()) {
1278            input.recycle();
1279        }
1280        return output;
1281    }
1282
1283    private int calcSampleSize(Uri image, int size) throws FileNotFoundException, SecurityException {
1284        BitmapFactory.Options options = new BitmapFactory.Options();
1285        options.inJustDecodeBounds = true;
1286        BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
1287        return calcSampleSize(options, size);
1288    }
1289
1290    public void updateFileParams(Message message) {
1291        updateFileParams(message, null);
1292    }
1293
1294    public void updateFileParams(Message message, URL url) {
1295        DownloadableFile file = getFile(message);
1296        final String mime = file.getMimeType();
1297        final boolean privateMessage = message.isPrivateMessage();
1298        final boolean image = message.getType() == Message.TYPE_IMAGE || (mime != null && mime.startsWith("image/"));
1299        final boolean video = mime != null && mime.startsWith("video/");
1300        final boolean audio = mime != null && mime.startsWith("audio/");
1301        final boolean pdf = "application/pdf".equals(mime);
1302        final StringBuilder body = new StringBuilder();
1303        if (url != null) {
1304            body.append(url.toString());
1305        }
1306        body.append('|').append(file.getSize());
1307        if (image || video || (pdf && Compatibility.runsTwentyOne())) {
1308            try {
1309                final Dimensions dimensions;
1310                if (video) {
1311                    dimensions = getVideoDimensions(file);
1312                } else if (pdf && Compatibility.runsTwentyOne()) {
1313                    dimensions = getPdfDocumentDimensions(file);
1314                } else {
1315                    dimensions = getImageDimensions(file);
1316                }
1317                if (dimensions.valid()) {
1318                    body.append('|').append(dimensions.width).append('|').append(dimensions.height);
1319                }
1320            } catch (NotAVideoFile notAVideoFile) {
1321                Log.d(Config.LOGTAG, "file with mime type " + file.getMimeType() + " was not a video file");
1322                //fall threw
1323            }
1324        } else if (audio) {
1325            body.append("|0|0|").append(getMediaRuntime(file));
1326        }
1327        message.setBody(body.toString());
1328        message.setDeleted(false);
1329        message.setType(privateMessage ? Message.TYPE_PRIVATE_FILE : (image ? Message.TYPE_IMAGE : Message.TYPE_FILE));
1330    }
1331
1332    private int getMediaRuntime(File file) {
1333        try {
1334            MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
1335            mediaMetadataRetriever.setDataSource(file.toString());
1336            return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
1337        } catch (RuntimeException e) {
1338            return 0;
1339        }
1340    }
1341
1342    private Dimensions getImageDimensions(File file) {
1343        BitmapFactory.Options options = new BitmapFactory.Options();
1344        options.inJustDecodeBounds = true;
1345        BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1346        int rotation = getRotation(file);
1347        boolean rotated = rotation == 90 || rotation == 270;
1348        int imageHeight = rotated ? options.outWidth : options.outHeight;
1349        int imageWidth = rotated ? options.outHeight : options.outWidth;
1350        return new Dimensions(imageHeight, imageWidth);
1351    }
1352
1353    private Dimensions getVideoDimensions(File file) throws NotAVideoFile {
1354        MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
1355        try {
1356            metadataRetriever.setDataSource(file.getAbsolutePath());
1357        } catch (RuntimeException e) {
1358            throw new NotAVideoFile(e);
1359        }
1360        return getVideoDimensions(metadataRetriever);
1361    }
1362
1363    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
1364    private Dimensions getPdfDocumentDimensions(final File file) {
1365        final ParcelFileDescriptor fileDescriptor;
1366        try {
1367            fileDescriptor = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
1368            if (fileDescriptor == null) {
1369                return new Dimensions(0, 0);
1370            }
1371        } catch (FileNotFoundException e) {
1372            return new Dimensions(0, 0);
1373        }
1374        try {
1375            final PdfRenderer pdfRenderer = new PdfRenderer(fileDescriptor);
1376            final PdfRenderer.Page page = pdfRenderer.openPage(0);
1377            final int height = page.getHeight();
1378            final int width = page.getWidth();
1379            page.close();
1380            pdfRenderer.close();
1381            return scalePdfDimensions(new Dimensions(height, width));
1382        } catch (IOException | SecurityException e) {
1383            Log.d(Config.LOGTAG, "unable to get dimensions for pdf document", e);
1384            return new Dimensions(0, 0);
1385        }
1386    }
1387
1388    private Dimensions scalePdfDimensions(Dimensions in) {
1389        final DisplayMetrics displayMetrics = mXmppConnectionService.getResources().getDisplayMetrics();
1390        final int target = (int) (displayMetrics.density * 288);
1391        return scalePdfDimensions(in, target, true);
1392    }
1393
1394    private static Dimensions scalePdfDimensions(final Dimensions in, final int target, final boolean fit) {
1395        final int w, h;
1396        if (fit == (in.width <= in.height)) {
1397            w = Math.max((int) (in.width / ((double) in.height / target)), 1);
1398            h = target;
1399        } else {
1400            w = target;
1401            h = Math.max((int) (in.height / ((double) in.width / target)), 1);
1402        }
1403        return new Dimensions(h, w);
1404    }
1405
1406    public Bitmap getAvatar(String avatar, int size) {
1407        if (avatar == null) {
1408            return null;
1409        }
1410        Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
1411        if (bm == null) {
1412            return null;
1413        }
1414        return bm;
1415    }
1416
1417    private static class Dimensions {
1418        public final int width;
1419        public final int height;
1420
1421        Dimensions(int height, int width) {
1422            this.width = width;
1423            this.height = height;
1424        }
1425
1426        public int getMin() {
1427            return Math.min(width, height);
1428        }
1429
1430        public boolean valid() {
1431            return width > 0 && height > 0;
1432        }
1433    }
1434
1435    private static class NotAVideoFile extends Exception {
1436        public NotAVideoFile(Throwable t) {
1437            super(t);
1438        }
1439
1440        public NotAVideoFile() {
1441            super();
1442        }
1443    }
1444
1445    public static class NotAnImageFileException extends Exception {
1446
1447    }
1448
1449    public static class FileCopyException extends Exception {
1450        private int resId;
1451
1452        private FileCopyException(int resId) {
1453            this.resId = resId;
1454        }
1455
1456        public int getResId() {
1457            return resId;
1458        }
1459    }
1460}