1package eu.siacs.conversations.persistance;
   2
   3import android.annotation.TargetApi;
   4import android.content.ContentResolver;
   5import android.content.Context;
   6import android.content.Intent;
   7import android.database.Cursor;
   8import android.graphics.Bitmap;
   9import android.graphics.BitmapFactory;
  10import android.graphics.Canvas;
  11import android.graphics.Color;
  12import android.graphics.Matrix;
  13import android.graphics.Paint;
  14import android.graphics.RectF;
  15import android.media.MediaMetadataRetriever;
  16import android.net.Uri;
  17import android.os.Build;
  18import android.os.Environment;
  19import android.os.ParcelFileDescriptor;
  20import android.provider.MediaStore;
  21import android.provider.OpenableColumns;
  22import android.support.v4.content.FileProvider;
  23import android.system.Os;
  24import android.system.StructStat;
  25import android.util.Base64;
  26import android.util.Base64OutputStream;
  27import android.util.Log;
  28import android.util.LruCache;
  29
  30import java.io.ByteArrayOutputStream;
  31import java.io.Closeable;
  32import java.io.File;
  33import java.io.FileDescriptor;
  34import java.io.FileInputStream;
  35import java.io.FileNotFoundException;
  36import java.io.FileOutputStream;
  37import java.io.IOException;
  38import java.io.InputStream;
  39import java.io.OutputStream;
  40import java.net.Socket;
  41import java.net.URL;
  42import java.security.DigestOutputStream;
  43import java.security.MessageDigest;
  44import java.security.NoSuchAlgorithmException;
  45import java.text.SimpleDateFormat;
  46import java.util.Date;
  47import java.util.List;
  48import java.util.Locale;
  49import java.util.UUID;
  50
  51import eu.siacs.conversations.Config;
  52import eu.siacs.conversations.R;
  53import eu.siacs.conversations.entities.DownloadableFile;
  54import eu.siacs.conversations.entities.Message;
  55import eu.siacs.conversations.services.XmppConnectionService;
  56import eu.siacs.conversations.ui.RecordingActivity;
  57import eu.siacs.conversations.utils.CryptoHelper;
  58import eu.siacs.conversations.utils.ExifHelper;
  59import eu.siacs.conversations.utils.FileUtils;
  60import eu.siacs.conversations.utils.FileWriterException;
  61import eu.siacs.conversations.utils.MimeUtils;
  62import eu.siacs.conversations.xmpp.pep.Avatar;
  63
  64public class FileBackend {
  65
  66    private static final Object THUMBNAIL_LOCK = new Object();
  67
  68    private static final SimpleDateFormat IMAGE_DATE_FORMAT = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US);
  69
  70    private static final String FILE_PROVIDER = ".files";
  71
  72    private XmppConnectionService mXmppConnectionService;
  73
  74    public FileBackend(XmppConnectionService service) {
  75        this.mXmppConnectionService = service;
  76    }
  77
  78    private static boolean isInDirectoryThatShouldNotBeScanned(Context context, File file) {
  79        return isInDirectoryThatShouldNotBeScanned(context, file.getAbsolutePath());
  80    }
  81
  82    public static boolean isInDirectoryThatShouldNotBeScanned(Context context, String path) {
  83        for (String type : new String[]{RecordingActivity.STORAGE_DIRECTORY_TYPE_NAME, "Files"}) {
  84            if (path.startsWith(getConversationsDirectory(context, type))) {
  85                return true;
  86            }
  87        }
  88        return false;
  89    }
  90
  91    public static long getFileSize(Context context, Uri uri) {
  92        try {
  93            final Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
  94            if (cursor != null && cursor.moveToFirst()) {
  95                long size = cursor.getLong(cursor.getColumnIndex(OpenableColumns.SIZE));
  96                cursor.close();
  97                return size;
  98            } else {
  99                return -1;
 100            }
 101        } catch (Exception e) {
 102            return -1;
 103        }
 104    }
 105
 106    public static boolean allFilesUnderSize(Context context, List<Uri> uris, long max) {
 107        if (max <= 0) {
 108            Log.d(Config.LOGTAG, "server did not report max file size for http upload");
 109            return true; //exception to be compatible with HTTP Upload < v0.2
 110        }
 111        for (Uri uri : uris) {
 112            String mime = context.getContentResolver().getType(uri);
 113            if (mime != null && mime.startsWith("video/")) {
 114                try {
 115                    Dimensions dimensions = FileBackend.getVideoDimensions(context, uri);
 116                    if (dimensions.getMin() > 720) {
 117                        Log.d(Config.LOGTAG, "do not consider video file with min width larger than 720 for size check");
 118                        continue;
 119                    }
 120                } catch (NotAVideoFile notAVideoFile) {
 121                    //ignore and fall through
 122                }
 123            }
 124            if (FileBackend.getFileSize(context, uri) > max) {
 125                Log.d(Config.LOGTAG, "not all files are under " + max + " bytes. suggesting falling back to jingle");
 126                return false;
 127            }
 128        }
 129        return true;
 130    }
 131
 132    public static String getConversationsDirectory(Context context, final String type) {
 133        if (Config.ONLY_INTERNAL_STORAGE) {
 134            return context.getFilesDir().getAbsolutePath() + "/" + type + "/";
 135        } else {
 136            return getAppMediaDirectory(context) + context.getString(R.string.app_name) + " " + type + "/";
 137        }
 138    }
 139
 140    public static String getAppMediaDirectory(Context context) {
 141        return Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + context.getString(R.string.app_name) + "/Media/";
 142    }
 143
 144    public static String getConversationsLogsDirectory() {
 145        return Environment.getExternalStorageDirectory().getAbsolutePath() + "/Conversations/";
 146    }
 147
 148    private static Bitmap rotate(Bitmap bitmap, int degree) {
 149        if (degree == 0) {
 150            return bitmap;
 151        }
 152        int w = bitmap.getWidth();
 153        int h = bitmap.getHeight();
 154        Matrix mtx = new Matrix();
 155        mtx.postRotate(degree);
 156        Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
 157        if (bitmap != null && !bitmap.isRecycled()) {
 158            bitmap.recycle();
 159        }
 160        return result;
 161    }
 162
 163    public static boolean isPathBlacklisted(String path) {
 164        final String androidDataPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Android/data/";
 165        return path.startsWith(androidDataPath);
 166    }
 167
 168    private static Paint createAntiAliasingPaint() {
 169        Paint paint = new Paint();
 170        paint.setAntiAlias(true);
 171        paint.setFilterBitmap(true);
 172        paint.setDither(true);
 173        return paint;
 174    }
 175
 176    private static String getTakePhotoPath() {
 177        return Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) + "/Camera/";
 178    }
 179
 180    public static Uri getUriForFile(Context context, File file) {
 181        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N || Config.ONLY_INTERNAL_STORAGE) {
 182            try {
 183                return FileProvider.getUriForFile(context, getAuthority(context), file);
 184            } catch (IllegalArgumentException e) {
 185                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 186                    throw new SecurityException(e);
 187                } else {
 188                    return Uri.fromFile(file);
 189                }
 190            }
 191        } else {
 192            return Uri.fromFile(file);
 193        }
 194    }
 195
 196    public static String getAuthority(Context context) {
 197        return context.getPackageName() + FILE_PROVIDER;
 198    }
 199
 200    private static boolean hasAlpha(final Bitmap bitmap) {
 201        for (int x = 0; x < bitmap.getWidth(); ++x) {
 202            for (int y = 0; y < bitmap.getWidth(); ++y) {
 203                if (Color.alpha(bitmap.getPixel(x, y)) < 255) {
 204                    return true;
 205                }
 206            }
 207        }
 208        return false;
 209    }
 210
 211    private static int calcSampleSize(File image, int size) {
 212        BitmapFactory.Options options = new BitmapFactory.Options();
 213        options.inJustDecodeBounds = true;
 214        BitmapFactory.decodeFile(image.getAbsolutePath(), options);
 215        return calcSampleSize(options, size);
 216    }
 217
 218    private static int calcSampleSize(BitmapFactory.Options options, int size) {
 219        int height = options.outHeight;
 220        int width = options.outWidth;
 221        int inSampleSize = 1;
 222
 223        if (height > size || width > size) {
 224            int halfHeight = height / 2;
 225            int halfWidth = width / 2;
 226
 227            while ((halfHeight / inSampleSize) > size
 228                    && (halfWidth / inSampleSize) > size) {
 229                inSampleSize *= 2;
 230            }
 231        }
 232        return inSampleSize;
 233    }
 234
 235    private static Dimensions getVideoDimensions(Context context, Uri uri) throws NotAVideoFile {
 236        MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
 237        try {
 238            mediaMetadataRetriever.setDataSource(context, uri);
 239        } catch (RuntimeException e) {
 240            throw new NotAVideoFile(e);
 241        }
 242        return getVideoDimensions(mediaMetadataRetriever);
 243    }
 244
 245    private static Dimensions getVideoDimensionsOfFrame(MediaMetadataRetriever mediaMetadataRetriever) {
 246        Bitmap bitmap = null;
 247        try {
 248            bitmap = mediaMetadataRetriever.getFrameAtTime();
 249            return new Dimensions(bitmap.getHeight(), bitmap.getWidth());
 250        } catch (Exception e) {
 251            return null;
 252        } finally {
 253            if (bitmap != null) {
 254                bitmap.recycle();
 255                ;
 256            }
 257        }
 258    }
 259
 260    private static Dimensions getVideoDimensions(MediaMetadataRetriever metadataRetriever) throws NotAVideoFile {
 261        String hasVideo = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_HAS_VIDEO);
 262        if (hasVideo == null) {
 263            throw new NotAVideoFile();
 264        }
 265        Dimensions dimensions = getVideoDimensionsOfFrame(metadataRetriever);
 266        if (dimensions != null) {
 267            return dimensions;
 268        }
 269        int rotation = extractRotationFromMediaRetriever(metadataRetriever);
 270        boolean rotated = rotation == 90 || rotation == 270;
 271        int height;
 272        try {
 273            String h = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
 274            height = Integer.parseInt(h);
 275        } catch (Exception e) {
 276            height = -1;
 277        }
 278        int width;
 279        try {
 280            String w = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
 281            width = Integer.parseInt(w);
 282        } catch (Exception e) {
 283            width = -1;
 284        }
 285        metadataRetriever.release();
 286        Log.d(Config.LOGTAG, "extracted video dims " + width + "x" + height);
 287        return rotated ? new Dimensions(width, height) : new Dimensions(height, width);
 288    }
 289
 290    private static int extractRotationFromMediaRetriever(MediaMetadataRetriever metadataRetriever) {
 291        String r = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
 292        try {
 293            return Integer.parseInt(r);
 294        } catch (Exception e) {
 295            return 0;
 296        }
 297    }
 298
 299    public static void close(Closeable stream) {
 300        if (stream != null) {
 301            try {
 302                stream.close();
 303            } catch (IOException e) {
 304            }
 305        }
 306    }
 307
 308    public static void close(Socket socket) {
 309        if (socket != null) {
 310            try {
 311                socket.close();
 312            } catch (IOException e) {
 313            }
 314        }
 315    }
 316
 317    public static boolean weOwnFile(Context context, Uri uri) {
 318        if (uri == null || !ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {
 319            return false;
 320        } else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
 321            return fileIsInFilesDir(context, uri);
 322        } else {
 323            return weOwnFileLollipop(uri);
 324        }
 325    }
 326
 327    /**
 328     * This is more than hacky but probably way better than doing nothing
 329     * Further 'optimizations' might contain to get the parents of CacheDir and NoBackupDir
 330     * and check against those as well
 331     */
 332    private static boolean fileIsInFilesDir(Context context, Uri uri) {
 333        try {
 334            final String haystack = context.getFilesDir().getParentFile().getCanonicalPath();
 335            final String needle = new File(uri.getPath()).getCanonicalPath();
 336            return needle.startsWith(haystack);
 337        } catch (IOException e) {
 338            return false;
 339        }
 340    }
 341
 342    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
 343    private static boolean weOwnFileLollipop(Uri uri) {
 344        try {
 345            File file = new File(uri.getPath());
 346            FileDescriptor fd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY).getFileDescriptor();
 347            StructStat st = Os.fstat(fd);
 348            return st.st_uid == android.os.Process.myUid();
 349        } catch (FileNotFoundException e) {
 350            return false;
 351        } catch (Exception e) {
 352            return true;
 353        }
 354    }
 355
 356    private void createNoMedia(File diretory) {
 357        final File noMedia = new File(diretory, ".nomedia");
 358        if (!noMedia.exists()) {
 359            try {
 360                if (!noMedia.createNewFile()) {
 361                    Log.d(Config.LOGTAG, "created nomedia file " + noMedia.getAbsolutePath());
 362                }
 363            } catch (Exception e) {
 364                Log.d(Config.LOGTAG, "could not create nomedia file");
 365            }
 366        }
 367    }
 368
 369    public void updateMediaScanner(File file) {
 370        if (!isInDirectoryThatShouldNotBeScanned(mXmppConnectionService, file)) {
 371            Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
 372            intent.setData(Uri.fromFile(file));
 373            mXmppConnectionService.sendBroadcast(intent);
 374        } else if (file.getAbsolutePath().startsWith(getAppMediaDirectory(mXmppConnectionService))) {
 375            createNoMedia(file.getParentFile());
 376        }
 377    }
 378
 379    public boolean deleteFile(Message message) {
 380        File file = getFile(message);
 381        if (file.delete()) {
 382            updateMediaScanner(file);
 383            return true;
 384        } else {
 385            return false;
 386        }
 387    }
 388
 389    public DownloadableFile getFile(Message message) {
 390        return getFile(message, true);
 391    }
 392
 393    public DownloadableFile getFileForPath(String path, String mime) {
 394        final DownloadableFile file;
 395        if (path.startsWith("/")) {
 396            file = new DownloadableFile(path);
 397        } else {
 398            if (mime != null && mime.startsWith("image/")) {
 399                file = new DownloadableFile(getConversationsDirectory("Images") + path);
 400            } else if (mime != null && mime.startsWith("video/")) {
 401                file = new DownloadableFile(getConversationsDirectory("Videos") + path);
 402            } else {
 403                file = new DownloadableFile(getConversationsDirectory("Files") + path);
 404            }
 405        }
 406        return file;
 407    }
 408
 409    public DownloadableFile getFile(Message message, boolean decrypted) {
 410        final boolean encrypted = !decrypted
 411                && (message.getEncryption() == Message.ENCRYPTION_PGP
 412                || message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
 413        String path = message.getRelativeFilePath();
 414        if (path == null) {
 415            path = message.getUuid();
 416        }
 417        final DownloadableFile file = getFileForPath(path, message.getMimeType());
 418        if (encrypted) {
 419            return new DownloadableFile(getConversationsDirectory("Files") + file.getName() + ".pgp");
 420        } else {
 421            return file;
 422        }
 423    }
 424
 425    public String getConversationsDirectory(final String type) {
 426        return getConversationsDirectory(mXmppConnectionService, type);
 427    }
 428
 429    private Bitmap resize(final Bitmap originalBitmap, int size) throws IOException {
 430        int w = originalBitmap.getWidth();
 431        int h = originalBitmap.getHeight();
 432        if (w <= 0 || h <= 0) {
 433            throw new IOException("Decoded bitmap reported bounds smaller 0");
 434        } else if (Math.max(w, h) > size) {
 435            int scalledW;
 436            int scalledH;
 437            if (w <= h) {
 438                scalledW = Math.max((int) (w / ((double) h / size)), 1);
 439                scalledH = size;
 440            } else {
 441                scalledW = size;
 442                scalledH = Math.max((int) (h / ((double) w / size)), 1);
 443            }
 444            final Bitmap result = Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
 445            if (!originalBitmap.isRecycled()) {
 446                originalBitmap.recycle();
 447            }
 448            return result;
 449        } else {
 450            return originalBitmap;
 451        }
 452    }
 453
 454    public boolean useImageAsIs(Uri uri) {
 455        String path = getOriginalPath(uri);
 456        if (path == null || isPathBlacklisted(path)) {
 457            return false;
 458        }
 459        File file = new File(path);
 460        long size = file.length();
 461        if (size == 0 || size >= mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize)) {
 462            return false;
 463        }
 464        BitmapFactory.Options options = new BitmapFactory.Options();
 465        options.inJustDecodeBounds = true;
 466        try {
 467            BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri), null, options);
 468            if (options.outMimeType == null || options.outHeight <= 0 || options.outWidth <= 0) {
 469                return false;
 470            }
 471            return (options.outWidth <= Config.IMAGE_SIZE && options.outHeight <= Config.IMAGE_SIZE && options.outMimeType.contains(Config.IMAGE_FORMAT.name().toLowerCase()));
 472        } catch (FileNotFoundException e) {
 473            return false;
 474        }
 475    }
 476
 477    public String getOriginalPath(Uri uri) {
 478        return FileUtils.getPath(mXmppConnectionService, uri);
 479    }
 480
 481    private void copyFileToPrivateStorage(File file, Uri uri) throws FileCopyException {
 482        Log.d(Config.LOGTAG, "copy file (" + uri.toString() + ") to private storage " + file.getAbsolutePath());
 483        file.getParentFile().mkdirs();
 484        OutputStream os = null;
 485        InputStream is = null;
 486        try {
 487            file.createNewFile();
 488            os = new FileOutputStream(file);
 489            is = mXmppConnectionService.getContentResolver().openInputStream(uri);
 490            byte[] buffer = new byte[1024];
 491            int length;
 492            while ((length = is.read(buffer)) > 0) {
 493                try {
 494                    os.write(buffer, 0, length);
 495                } catch (IOException e) {
 496                    throw new FileWriterException();
 497                }
 498            }
 499            try {
 500                os.flush();
 501            } catch (IOException e) {
 502                throw new FileWriterException();
 503            }
 504        } catch (FileNotFoundException e) {
 505            throw new FileCopyException(R.string.error_file_not_found);
 506        } catch (FileWriterException e) {
 507            throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
 508        } catch (IOException e) {
 509            e.printStackTrace();
 510            throw new FileCopyException(R.string.error_io_exception);
 511        } finally {
 512            close(os);
 513            close(is);
 514        }
 515    }
 516
 517    public void copyFileToPrivateStorage(Message message, Uri uri, String type) throws FileCopyException {
 518        String mime = type != null ? type : MimeUtils.guessMimeTypeFromUri(mXmppConnectionService, uri);
 519        Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage (mime=" + mime + ")");
 520        String extension = MimeUtils.guessExtensionFromMimeType(mime);
 521        if (extension == null) {
 522            Log.d(Config.LOGTAG, "extension from mime type was null");
 523            extension = getExtensionFromUri(uri);
 524        }
 525        if ("ogg".equals(extension) && type != null && type.startsWith("audio/")) {
 526            extension = "oga";
 527        }
 528        message.setRelativeFilePath(message.getUuid() + "." + extension);
 529        copyFileToPrivateStorage(mXmppConnectionService.getFileBackend().getFile(message), uri);
 530    }
 531
 532    private String getExtensionFromUri(Uri uri) {
 533        String[] projection = {MediaStore.MediaColumns.DATA};
 534        String filename = null;
 535        Cursor cursor = mXmppConnectionService.getContentResolver().query(uri, projection, null, null, null);
 536        if (cursor != null) {
 537            try {
 538                if (cursor.moveToFirst()) {
 539                    filename = cursor.getString(0);
 540                }
 541            } catch (Exception e) {
 542                filename = null;
 543            } finally {
 544                cursor.close();
 545            }
 546        }
 547        if (filename == null) {
 548            final List<String> segments = uri.getPathSegments();
 549            if (segments.size() > 0) {
 550                filename = segments.get(segments.size() - 1);
 551            }
 552        }
 553        int pos = filename == null ? -1 : filename.lastIndexOf('.');
 554        return pos > 0 ? filename.substring(pos + 1) : null;
 555    }
 556
 557    private void copyImageToPrivateStorage(File file, Uri image, int sampleSize) throws FileCopyException {
 558        file.getParentFile().mkdirs();
 559        InputStream is = null;
 560        OutputStream os = null;
 561        try {
 562            if (!file.exists() && !file.createNewFile()) {
 563                throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
 564            }
 565            is = mXmppConnectionService.getContentResolver().openInputStream(image);
 566            if (is == null) {
 567                throw new FileCopyException(R.string.error_not_an_image_file);
 568            }
 569            Bitmap originalBitmap;
 570            BitmapFactory.Options options = new BitmapFactory.Options();
 571            int inSampleSize = (int) Math.pow(2, sampleSize);
 572            Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
 573            options.inSampleSize = inSampleSize;
 574            originalBitmap = BitmapFactory.decodeStream(is, null, options);
 575            is.close();
 576            if (originalBitmap == null) {
 577                throw new FileCopyException(R.string.error_not_an_image_file);
 578            }
 579            Bitmap scaledBitmap = resize(originalBitmap, Config.IMAGE_SIZE);
 580            int rotation = getRotation(image);
 581            scaledBitmap = rotate(scaledBitmap, rotation);
 582            boolean targetSizeReached = false;
 583            int quality = Config.IMAGE_QUALITY;
 584            final int imageMaxSize = mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize);
 585            while (!targetSizeReached) {
 586                os = new FileOutputStream(file);
 587                boolean success = scaledBitmap.compress(Config.IMAGE_FORMAT, quality, os);
 588                if (!success) {
 589                    throw new FileCopyException(R.string.error_compressing_image);
 590                }
 591                os.flush();
 592                targetSizeReached = file.length() <= imageMaxSize || quality <= 50;
 593                quality -= 5;
 594            }
 595            scaledBitmap.recycle();
 596        } catch (FileNotFoundException e) {
 597            throw new FileCopyException(R.string.error_file_not_found);
 598        } catch (IOException e) {
 599            e.printStackTrace();
 600            throw new FileCopyException(R.string.error_io_exception);
 601        } catch (SecurityException e) {
 602            throw new FileCopyException(R.string.error_security_exception_during_image_copy);
 603        } catch (OutOfMemoryError e) {
 604            ++sampleSize;
 605            if (sampleSize <= 3) {
 606                copyImageToPrivateStorage(file, image, sampleSize);
 607            } else {
 608                throw new FileCopyException(R.string.error_out_of_memory);
 609            }
 610        } finally {
 611            close(os);
 612            close(is);
 613        }
 614    }
 615
 616    public void copyImageToPrivateStorage(File file, Uri image) throws FileCopyException {
 617        Log.d(Config.LOGTAG, "copy image (" + image.toString() + ") to private storage " + file.getAbsolutePath());
 618        copyImageToPrivateStorage(file, image, 0);
 619    }
 620
 621    public void copyImageToPrivateStorage(Message message, Uri image) throws FileCopyException {
 622        switch (Config.IMAGE_FORMAT) {
 623            case JPEG:
 624                message.setRelativeFilePath(message.getUuid() + ".jpg");
 625                break;
 626            case PNG:
 627                message.setRelativeFilePath(message.getUuid() + ".png");
 628                break;
 629            case WEBP:
 630                message.setRelativeFilePath(message.getUuid() + ".webp");
 631                break;
 632        }
 633        copyImageToPrivateStorage(getFile(message), image);
 634        updateFileParams(message);
 635    }
 636
 637    private int getRotation(File file) {
 638        return getRotation(Uri.parse("file://" + file.getAbsolutePath()));
 639    }
 640
 641    private int getRotation(Uri image) {
 642        InputStream is = null;
 643        try {
 644            is = mXmppConnectionService.getContentResolver().openInputStream(image);
 645            return ExifHelper.getOrientation(is);
 646        } catch (FileNotFoundException e) {
 647            return 0;
 648        } finally {
 649            close(is);
 650        }
 651    }
 652
 653    public Bitmap getThumbnail(Message message, int size, boolean cacheOnly) throws IOException {
 654        final String uuid = message.getUuid();
 655        final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
 656        Bitmap thumbnail = cache.get(uuid);
 657        if ((thumbnail == null) && (!cacheOnly)) {
 658            synchronized (THUMBNAIL_LOCK) {
 659                thumbnail = cache.get(uuid);
 660                if (thumbnail != null) {
 661                    return thumbnail;
 662                }
 663                DownloadableFile file = getFile(message);
 664                final String mime = file.getMimeType();
 665                if (mime.startsWith("video/")) {
 666                    thumbnail = getVideoPreview(file, size);
 667                } else {
 668                    Bitmap fullsize = getFullsizeImagePreview(file, size);
 669                    if (fullsize == null) {
 670                        throw new FileNotFoundException();
 671                    }
 672                    thumbnail = resize(fullsize, size);
 673                    thumbnail = rotate(thumbnail, getRotation(file));
 674                    if (mime.equals("image/gif")) {
 675                        Bitmap withGifOverlay = thumbnail.copy(Bitmap.Config.ARGB_8888, true);
 676                        drawOverlay(withGifOverlay, paintOverlayBlack(withGifOverlay) ? R.drawable.play_gif_black : R.drawable.play_gif_white, 1.0f);
 677                        thumbnail.recycle();
 678                        thumbnail = withGifOverlay;
 679                    }
 680                }
 681                this.mXmppConnectionService.getBitmapCache().put(uuid, thumbnail);
 682            }
 683        }
 684        return thumbnail;
 685    }
 686
 687    private Bitmap getFullsizeImagePreview(File file, int size) {
 688        BitmapFactory.Options options = new BitmapFactory.Options();
 689        options.inSampleSize = calcSampleSize(file, size);
 690        try {
 691            return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 692        } catch (OutOfMemoryError e) {
 693            options.inSampleSize *= 2;
 694            return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 695        }
 696    }
 697
 698    private void drawOverlay(Bitmap bitmap, int resource, float factor) {
 699        Bitmap overlay = BitmapFactory.decodeResource(mXmppConnectionService.getResources(), resource);
 700        Canvas canvas = new Canvas(bitmap);
 701        float targetSize = Math.min(canvas.getWidth(), canvas.getHeight()) * factor;
 702        Log.d(Config.LOGTAG, "target size overlay: " + targetSize + " overlay bitmap size was " + overlay.getHeight());
 703        float left = (canvas.getWidth() - targetSize) / 2.0f;
 704        float top = (canvas.getHeight() - targetSize) / 2.0f;
 705        RectF dst = new RectF(left, top, left + targetSize - 1, top + targetSize - 1);
 706        canvas.drawBitmap(overlay, null, dst, createAntiAliasingPaint());
 707    }
 708
 709    /**
 710     * https://stackoverflow.com/a/3943023/210897
 711     */
 712    private boolean paintOverlayBlack(final Bitmap bitmap) {
 713        int record = 0;
 714        for (int y = 0; y < bitmap.getHeight(); ++y) {
 715            for (int x = 0; x < bitmap.getWidth(); ++x) {
 716                int pixel = bitmap.getPixel(x, y);
 717                if ((Color.red(pixel) * 0.299 + Color.green(pixel) * 0.587 + Color.blue(pixel) * 0.114) > 186) {
 718                    --record;
 719                } else {
 720                    ++record;
 721                }
 722            }
 723        }
 724        return record < 0;
 725    }
 726
 727    private Bitmap getVideoPreview(File file, int size) {
 728        MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
 729        Bitmap frame;
 730        try {
 731            metadataRetriever.setDataSource(file.getAbsolutePath());
 732            frame = metadataRetriever.getFrameAtTime(0);
 733            metadataRetriever.release();
 734            frame = resize(frame, size);
 735        } catch (IOException | RuntimeException e) {
 736            frame = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
 737            frame.eraseColor(0xff000000);
 738        }
 739        drawOverlay(frame, paintOverlayBlack(frame) ? R.drawable.play_video_black : R.drawable.play_video_white, 0.75f);
 740        return frame;
 741    }
 742
 743    public Uri getTakePhotoUri() {
 744        File file;
 745        if (Config.ONLY_INTERNAL_STORAGE) {
 746            file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath(), "Camera/IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
 747        } else {
 748            file = new File(getTakePhotoPath() + "IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
 749        }
 750        file.getParentFile().mkdirs();
 751        return getUriForFile(mXmppConnectionService, file);
 752    }
 753
 754    public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
 755
 756        final Avatar uncompressAvatar = getUncompressedAvatar(image);
 757        if (uncompressAvatar != null && uncompressAvatar.image.length() <= Config.AVATAR_CHAR_LIMIT) {
 758            return uncompressAvatar;
 759        }
 760        if (uncompressAvatar != null) {
 761            Log.d(Config.LOGTAG, "uncompressed avatar exceeded char limit by " + (uncompressAvatar.image.length() - Config.AVATAR_CHAR_LIMIT));
 762        }
 763
 764        Bitmap bm = cropCenterSquare(image, size);
 765        if (bm == null) {
 766            return null;
 767        }
 768        if (hasAlpha(bm)) {
 769            Log.d(Config.LOGTAG, "alpha in avatar detected; uploading as PNG");
 770            bm.recycle();
 771            bm = cropCenterSquare(image, 96);
 772            return getPepAvatar(bm, Bitmap.CompressFormat.PNG, 100);
 773        }
 774        return getPepAvatar(bm, format, 100);
 775    }
 776
 777    private Avatar getUncompressedAvatar(Uri uri) {
 778        Bitmap bitmap = null;
 779        try {
 780            bitmap = BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri));
 781            return getPepAvatar(bitmap, Bitmap.CompressFormat.PNG, 100);
 782        } catch (Exception e) {
 783            if (bitmap != null) {
 784                bitmap.recycle();
 785            }
 786        }
 787        return null;
 788    }
 789
 790    private Avatar getPepAvatar(Bitmap bitmap, Bitmap.CompressFormat format, int quality) {
 791        try {
 792            ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
 793            Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
 794            MessageDigest digest = MessageDigest.getInstance("SHA-1");
 795            DigestOutputStream mDigestOutputStream = new DigestOutputStream(mBase64OutputStream, digest);
 796            if (!bitmap.compress(format, quality, mDigestOutputStream)) {
 797                return null;
 798            }
 799            mDigestOutputStream.flush();
 800            mDigestOutputStream.close();
 801            long chars = mByteArrayOutputStream.size();
 802            if (format != Bitmap.CompressFormat.PNG && quality >= 50 && chars >= Config.AVATAR_CHAR_LIMIT) {
 803                int q = quality - 2;
 804                Log.d(Config.LOGTAG, "avatar char length was " + chars + " reducing quality to " + q);
 805                return getPepAvatar(bitmap, format, q);
 806            }
 807            Log.d(Config.LOGTAG, "settled on char length " + chars + " with quality=" + quality);
 808            final Avatar avatar = new Avatar();
 809            avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
 810            avatar.image = new String(mByteArrayOutputStream.toByteArray());
 811            if (format.equals(Bitmap.CompressFormat.WEBP)) {
 812                avatar.type = "image/webp";
 813            } else if (format.equals(Bitmap.CompressFormat.JPEG)) {
 814                avatar.type = "image/jpeg";
 815            } else if (format.equals(Bitmap.CompressFormat.PNG)) {
 816                avatar.type = "image/png";
 817            }
 818            avatar.width = bitmap.getWidth();
 819            avatar.height = bitmap.getHeight();
 820            return avatar;
 821        } catch (Exception e) {
 822            return null;
 823        }
 824    }
 825
 826    public Avatar getStoredPepAvatar(String hash) {
 827        if (hash == null) {
 828            return null;
 829        }
 830        Avatar avatar = new Avatar();
 831        File file = new File(getAvatarPath(hash));
 832        FileInputStream is = null;
 833        try {
 834            avatar.size = file.length();
 835            BitmapFactory.Options options = new BitmapFactory.Options();
 836            options.inJustDecodeBounds = true;
 837            BitmapFactory.decodeFile(file.getAbsolutePath(), options);
 838            is = new FileInputStream(file);
 839            ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
 840            Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
 841            MessageDigest digest = MessageDigest.getInstance("SHA-1");
 842            DigestOutputStream os = new DigestOutputStream(mBase64OutputStream, digest);
 843            byte[] buffer = new byte[4096];
 844            int length;
 845            while ((length = is.read(buffer)) > 0) {
 846                os.write(buffer, 0, length);
 847            }
 848            os.flush();
 849            os.close();
 850            avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
 851            avatar.image = new String(mByteArrayOutputStream.toByteArray());
 852            avatar.height = options.outHeight;
 853            avatar.width = options.outWidth;
 854            avatar.type = options.outMimeType;
 855            return avatar;
 856        } catch (NoSuchAlgorithmException | IOException e) {
 857            return null;
 858        } finally {
 859            close(is);
 860        }
 861    }
 862
 863    public boolean isAvatarCached(Avatar avatar) {
 864        File file = new File(getAvatarPath(avatar.getFilename()));
 865        return file.exists();
 866    }
 867
 868    public boolean save(final Avatar avatar) {
 869        File file;
 870        if (isAvatarCached(avatar)) {
 871            file = new File(getAvatarPath(avatar.getFilename()));
 872            avatar.size = file.length();
 873        } else {
 874            file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath() + "/" + UUID.randomUUID().toString());
 875            if (file.getParentFile().mkdirs()) {
 876                Log.d(Config.LOGTAG, "created cache directory");
 877            }
 878            OutputStream os = null;
 879            try {
 880                if (!file.createNewFile()) {
 881                    Log.d(Config.LOGTAG, "unable to create temporary file " + file.getAbsolutePath());
 882                }
 883                os = new FileOutputStream(file);
 884                MessageDigest digest = MessageDigest.getInstance("SHA-1");
 885                digest.reset();
 886                DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
 887                final byte[] bytes = avatar.getImageAsBytes();
 888                mDigestOutputStream.write(bytes);
 889                mDigestOutputStream.flush();
 890                mDigestOutputStream.close();
 891                String sha1sum = CryptoHelper.bytesToHex(digest.digest());
 892                if (sha1sum.equals(avatar.sha1sum)) {
 893                    File outputFile = new File(getAvatarPath(avatar.getFilename()));
 894                    if (outputFile.getParentFile().mkdirs()) {
 895                        Log.d(Config.LOGTAG, "created avatar directory");
 896                    }
 897                    String filename = getAvatarPath(avatar.getFilename());
 898                    if (!file.renameTo(new File(filename))) {
 899                        Log.d(Config.LOGTAG, "unable to rename " + file.getAbsolutePath() + " to " + outputFile);
 900                        return false;
 901                    }
 902                } else {
 903                    Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
 904                    if (!file.delete()) {
 905                        Log.d(Config.LOGTAG, "unable to delete temporary file");
 906                    }
 907                    return false;
 908                }
 909                avatar.size = bytes.length;
 910            } catch (IllegalArgumentException | IOException | NoSuchAlgorithmException e) {
 911                return false;
 912            } finally {
 913                close(os);
 914            }
 915        }
 916        return true;
 917    }
 918
 919    private String getAvatarPath(String avatar) {
 920        return mXmppConnectionService.getFilesDir().getAbsolutePath() + "/avatars/" + avatar;
 921    }
 922
 923    public Uri getAvatarUri(String avatar) {
 924        return Uri.parse("file:" + getAvatarPath(avatar));
 925    }
 926
 927    public Bitmap cropCenterSquare(Uri image, int size) {
 928        if (image == null) {
 929            return null;
 930        }
 931        InputStream is = null;
 932        try {
 933            BitmapFactory.Options options = new BitmapFactory.Options();
 934            options.inSampleSize = calcSampleSize(image, size);
 935            is = mXmppConnectionService.getContentResolver().openInputStream(image);
 936            if (is == null) {
 937                return null;
 938            }
 939            Bitmap input = BitmapFactory.decodeStream(is, null, options);
 940            if (input == null) {
 941                return null;
 942            } else {
 943                input = rotate(input, getRotation(image));
 944                return cropCenterSquare(input, size);
 945            }
 946        } catch (FileNotFoundException | SecurityException e) {
 947            return null;
 948        } finally {
 949            close(is);
 950        }
 951    }
 952
 953    public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
 954        if (image == null) {
 955            return null;
 956        }
 957        InputStream is = null;
 958        try {
 959            BitmapFactory.Options options = new BitmapFactory.Options();
 960            options.inSampleSize = calcSampleSize(image, Math.max(newHeight, newWidth));
 961            is = mXmppConnectionService.getContentResolver().openInputStream(image);
 962            if (is == null) {
 963                return null;
 964            }
 965            Bitmap source = BitmapFactory.decodeStream(is, null, options);
 966            if (source == null) {
 967                return null;
 968            }
 969            int sourceWidth = source.getWidth();
 970            int sourceHeight = source.getHeight();
 971            float xScale = (float) newWidth / sourceWidth;
 972            float yScale = (float) newHeight / sourceHeight;
 973            float scale = Math.max(xScale, yScale);
 974            float scaledWidth = scale * sourceWidth;
 975            float scaledHeight = scale * sourceHeight;
 976            float left = (newWidth - scaledWidth) / 2;
 977            float top = (newHeight - scaledHeight) / 2;
 978
 979            RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
 980            Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
 981            Canvas canvas = new Canvas(dest);
 982            canvas.drawBitmap(source, null, targetRect, createAntiAliasingPaint());
 983            if (source.isRecycled()) {
 984                source.recycle();
 985            }
 986            return dest;
 987        } catch (SecurityException e) {
 988            return null; //android 6.0 with revoked permissions for example
 989        } catch (FileNotFoundException e) {
 990            return null;
 991        } finally {
 992            close(is);
 993        }
 994    }
 995
 996    public Bitmap cropCenterSquare(Bitmap input, int size) {
 997        int w = input.getWidth();
 998        int h = input.getHeight();
 999
1000        float scale = Math.max((float) size / h, (float) size / w);
1001
1002        float outWidth = scale * w;
1003        float outHeight = scale * h;
1004        float left = (size - outWidth) / 2;
1005        float top = (size - outHeight) / 2;
1006        RectF target = new RectF(left, top, left + outWidth, top + outHeight);
1007
1008        Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
1009        Canvas canvas = new Canvas(output);
1010        canvas.drawBitmap(input, null, target, createAntiAliasingPaint());
1011        if (!input.isRecycled()) {
1012            input.recycle();
1013        }
1014        return output;
1015    }
1016
1017    private int calcSampleSize(Uri image, int size) throws FileNotFoundException, SecurityException {
1018        BitmapFactory.Options options = new BitmapFactory.Options();
1019        options.inJustDecodeBounds = true;
1020        BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
1021        return calcSampleSize(options, size);
1022    }
1023
1024    public void updateFileParams(Message message) {
1025        updateFileParams(message, null);
1026    }
1027
1028    public void updateFileParams(Message message, URL url) {
1029        DownloadableFile file = getFile(message);
1030        final String mime = file.getMimeType();
1031        boolean image = message.getType() == Message.TYPE_IMAGE || (mime != null && mime.startsWith("image/"));
1032        boolean video = mime != null && mime.startsWith("video/");
1033        boolean audio = mime != null && mime.startsWith("audio/");
1034        final StringBuilder body = new StringBuilder();
1035        if (url != null) {
1036            body.append(url.toString());
1037        }
1038        body.append('|').append(file.getSize());
1039        if (image || video) {
1040            try {
1041                Dimensions dimensions = image ? getImageDimensions(file) : getVideoDimensions(file);
1042                if (dimensions.valid()) {
1043                    body.append('|').append(dimensions.width).append('|').append(dimensions.height);
1044                }
1045            } catch (NotAVideoFile notAVideoFile) {
1046                Log.d(Config.LOGTAG, "file with mime type " + file.getMimeType() + " was not a video file");
1047                //fall threw
1048            }
1049        } else if (audio) {
1050            body.append("|0|0|").append(getMediaRuntime(file));
1051        }
1052        message.setBody(body.toString());
1053    }
1054
1055    public int getMediaRuntime(Uri uri) {
1056        try {
1057            MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
1058            mediaMetadataRetriever.setDataSource(mXmppConnectionService, uri);
1059            return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
1060        } catch (RuntimeException e) {
1061            return 0;
1062        }
1063    }
1064
1065    private int getMediaRuntime(File file) {
1066        try {
1067            MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
1068            mediaMetadataRetriever.setDataSource(file.toString());
1069            return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
1070        } catch (RuntimeException e) {
1071            return 0;
1072        }
1073    }
1074
1075    private Dimensions getImageDimensions(File file) {
1076        BitmapFactory.Options options = new BitmapFactory.Options();
1077        options.inJustDecodeBounds = true;
1078        BitmapFactory.decodeFile(file.getAbsolutePath(), options);
1079        int rotation = getRotation(file);
1080        boolean rotated = rotation == 90 || rotation == 270;
1081        int imageHeight = rotated ? options.outWidth : options.outHeight;
1082        int imageWidth = rotated ? options.outHeight : options.outWidth;
1083        return new Dimensions(imageHeight, imageWidth);
1084    }
1085
1086    private Dimensions getVideoDimensions(File file) throws NotAVideoFile {
1087        MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
1088        try {
1089            metadataRetriever.setDataSource(file.getAbsolutePath());
1090        } catch (RuntimeException e) {
1091            throw new NotAVideoFile(e);
1092        }
1093        return getVideoDimensions(metadataRetriever);
1094    }
1095
1096    public Bitmap getAvatar(String avatar, int size) {
1097        if (avatar == null) {
1098            return null;
1099        }
1100        Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
1101        if (bm == null) {
1102            return null;
1103        }
1104        return bm;
1105    }
1106
1107    public boolean isFileAvailable(Message message) {
1108        return getFile(message).exists();
1109    }
1110
1111    private static class Dimensions {
1112        public final int width;
1113        public final int height;
1114
1115        Dimensions(int height, int width) {
1116            this.width = width;
1117            this.height = height;
1118        }
1119
1120        public int getMin() {
1121            return Math.min(width, height);
1122        }
1123
1124        public boolean valid() {
1125            return width > 0 && height > 0;
1126        }
1127    }
1128
1129    private static class NotAVideoFile extends Exception {
1130        public NotAVideoFile(Throwable t) {
1131            super(t);
1132        }
1133
1134        public NotAVideoFile() {
1135            super();
1136        }
1137    }
1138
1139    public class FileCopyException extends Exception {
1140        private static final long serialVersionUID = -1010013599132881427L;
1141        private int resId;
1142
1143        public FileCopyException(int resId) {
1144            this.resId = resId;
1145        }
1146
1147        public int getResId() {
1148            return resId;
1149        }
1150    }
1151}