changed package id inside manifest and project

1 files changed, 893 insertions, 0 deletions

diff --git a/src/main/java/de/pixart/messenger/persistance/FileBackend.java b/src/main/java/de/pixart/messenger/persistance/FileBackend.java
new file mode 100644
index 000000000..4fab799b9
--- /dev/null
+++ b/src/main/java/de/pixart/messenger/persistance/FileBackend.java
@@ -0,0 +1,893 @@
+package de.pixart.messenger.persistance;
+
+import android.annotation.TargetApi;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.Intent;
+import android.database.Cursor;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Canvas;
+import android.graphics.Matrix;
+import android.graphics.RectF;
+import android.media.MediaMetadataRetriever;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Environment;
+import android.os.ParcelFileDescriptor;
+import android.provider.MediaStore;
+import android.provider.OpenableColumns;
+import android.system.Os;
+import android.system.StructStat;
+import android.util.Base64;
+import android.util.Base64OutputStream;
+import android.util.Log;
+import android.util.LruCache;
+import android.webkit.MimeTypeMap;
+
+import java.io.ByteArrayOutputStream;
+import java.io.Closeable;
+import java.io.File;
+import java.io.FileDescriptor;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.Socket;
+import java.net.URL;
+import java.security.DigestOutputStream;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.List;
+import java.util.Locale;
+
+import de.pixart.messenger.Config;
+import de.pixart.messenger.R;
+import de.pixart.messenger.entities.DownloadableFile;
+import de.pixart.messenger.entities.Message;
+import de.pixart.messenger.services.XmppConnectionService;
+import de.pixart.messenger.utils.CryptoHelper;
+import de.pixart.messenger.utils.ExifHelper;
+import de.pixart.messenger.utils.FileUtils;
+import de.pixart.messenger.xmpp.pep.Avatar;
+
+public class FileBackend {
+	private final SimpleDateFormat fileDateFormat = new SimpleDateFormat("yyyyMMdd_HHmmssSSS", Locale.US);
+
+	private XmppConnectionService mXmppConnectionService;
+
+	public FileBackend(XmppConnectionService service) {
+		this.mXmppConnectionService = service;
+	}
+
+	private void createNoMedia() {
+		final File nomedia_files = new File(getConversationsFileDirectory()+".nomedia");
+		final File nomedia_audios = new File(getConversationsAudioDirectory()+".nomedia");
+		if (!nomedia_files.exists()) {
+			try {
+				nomedia_files.createNewFile();
+			} catch (Exception e) {
+				Log.d(Config.LOGTAG, "could not create nomedia file for files directory");
+			}
+		}
+		if (!nomedia_audios.exists()) {
+			try {
+				nomedia_audios.createNewFile();
+			} catch (Exception e) {
+				Log.d(Config.LOGTAG, "could not create nomedia file for audio directory");
+			}
+		}
+	}
+
+	public void updateMediaScanner(File file) {
+		if (file.getAbsolutePath().startsWith(getConversationsImageDirectory())
+				|| file.getAbsolutePath().startsWith(getConversationsVideoDirectory())) {
+			Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
+			intent.setData(Uri.fromFile(file));
+			mXmppConnectionService.sendBroadcast(intent);
+		} else {
+			createNoMedia();
+		}
+	}
+
+	public boolean deleteFile(Message message) {
+		File file = getFile(message);
+		if (file.delete()) {
+			updateMediaScanner(file);
+			return true;
+		} else {
+			return false;
+		}
+	}
+
+	public DownloadableFile getFile(Message message) {
+		return getFile(message, true);
+	}
+
+	public DownloadableFile getFile(Message message, boolean decrypted) {
+		final boolean encrypted = !decrypted
+				&& (message.getEncryption() == Message.ENCRYPTION_PGP
+				|| message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
+		final DownloadableFile file;
+		String path = message.getRelativeFilePath();
+		if (path == null) {
+            String filename = fileDateFormat.format(new Date(message.getTimeSent()))+"_"+message.getUuid().substring(0,4);
+			path = filename;
+		}
+        if (path.startsWith("/")) {
+            file = new DownloadableFile(path);
+        } else {
+            String mime = message.getMimeType();
+            if (mime != null && mime.startsWith("image")) {
+                file = new DownloadableFile(getConversationsImageDirectory() + path);
+            } else if (mime != null && mime.startsWith("video")) {
+                file = new DownloadableFile(getConversationsVideoDirectory() + path);
+            } else if (mime != null && mime.startsWith("audio")) {
+                file = new DownloadableFile(getConversationsAudioDirectory() + path);
+            } else {
+                file = new DownloadableFile(getConversationsFileDirectory() + path);
+            }
+        }
+        if (encrypted) {
+			return new DownloadableFile(getConversationsFileDirectory() + file.getName() + ".pgp");
+		} else {
+			return file;
+		}
+	}
+
+	private static long getFileSize(Context context, Uri uri) {
+		Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
+		if (cursor != null && cursor.moveToFirst()) {
+			return cursor.getLong(cursor.getColumnIndex(OpenableColumns.SIZE));
+		} else {
+			return -1;
+		}
+	}
+
+	public static boolean allFilesUnderSize(Context context, List<Uri> uris, long max) {
+		if (max <= 0) {
+			Log.d(Config.LOGTAG,"server did not report max file size for http upload");
+			return true; //exception to be compatible with HTTP Upload < v0.2
+		}
+		for(Uri uri : uris) {
+			if (FileBackend.getFileSize(context, uri) > max) {
+				Log.d(Config.LOGTAG,"not all files are under "+max+" bytes. suggesting falling back to jingle");
+				return false;
+			}
+		}
+		return true;
+	}
+
+	public static String getConversationsFileDirectory() {
+		return  Environment.getExternalStorageDirectory().getAbsolutePath()+"/Pix-Art Messenger/files/";
+	}
+
+	public static String getConversationsImageDirectory() {
+		return  Environment.getExternalStorageDirectory().getAbsolutePath()+"/Pix-Art Messenger/images/";
+	}
+
+	public static String getConversationsVideoDirectory() {
+		return  Environment.getExternalStorageDirectory().getAbsolutePath()+"/Pix-Art Messenger/videos/";
+	}
+
+	public static String getConversationsAudioDirectory() {
+		return  Environment.getExternalStorageDirectory().getAbsolutePath()+"/Pix-Art Messenger/audios/";
+	}
+
+	public static String getConversationsDirectory() {
+		return  Environment.getExternalStorageDirectory().getAbsolutePath()+"/Pix-Art Messenger/";
+	}
+
+	public Bitmap resize(Bitmap originalBitmap, int size) {
+		int w = originalBitmap.getWidth();
+		int h = originalBitmap.getHeight();
+		if (Math.max(w, h) > size) {
+			int scalledW;
+			int scalledH;
+			if (w <= h) {
+				scalledW = (int) (w / ((double) h / size));
+				scalledH = size;
+			} else {
+				scalledW = size;
+				scalledH = (int) (h / ((double) w / size));
+			}
+			Bitmap result = Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
+			if (originalBitmap != null && !originalBitmap.isRecycled()) {
+				originalBitmap.recycle();
+			}
+			return result;
+		} else {
+			return originalBitmap;
+		}
+	}
+
+	public static Bitmap rotate(Bitmap bitmap, int degree) {
+		if (degree == 0) {
+			return bitmap;
+		}
+		int w = bitmap.getWidth();
+		int h = bitmap.getHeight();
+		Matrix mtx = new Matrix();
+		mtx.postRotate(degree);
+		Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
+		if (bitmap != null && !bitmap.isRecycled()) {
+			bitmap.recycle();
+		}
+		return result;
+	}
+
+	public boolean useImageAsIs(Uri uri) {
+		String path = getOriginalPath(uri);
+		if (path == null) {
+			return false;
+		}
+		File file = new File(path);
+		long size = file.length();
+		if (size == 0 || size >= Config.IMAGE_MAX_SIZE ) {
+			return false;
+		}
+		BitmapFactory.Options options = new BitmapFactory.Options();
+		options.inJustDecodeBounds = true;
+		try {
+			BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri), null, options);
+			if (options == null || options.outMimeType == null || options.outHeight <= 0 || options.outWidth <= 0) {
+				return false;
+			}
+			return (options.outWidth <= Config.IMAGE_SIZE && options.outHeight <= Config.IMAGE_SIZE && options.outMimeType.contains(Config.IMAGE_FORMAT.name().toLowerCase()));
+		} catch (FileNotFoundException e) {
+			return false;
+		}
+	}
+
+	public String getOriginalPath(Uri uri) {
+		return FileUtils.getPath(mXmppConnectionService,uri);
+	}
+
+	public void copyFileToPrivateStorage(File file, Uri uri) throws FileCopyException {
+		file.getParentFile().mkdirs();
+		OutputStream os = null;
+		InputStream is = null;
+		try {
+			file.createNewFile();
+			os = new FileOutputStream(file);
+			is = mXmppConnectionService.getContentResolver().openInputStream(uri);
+			byte[] buffer = new byte[1024];
+			int length;
+			while ((length = is.read(buffer)) > 0) {
+				os.write(buffer, 0, length);
+			}
+			os.flush();
+		} catch(FileNotFoundException e) {
+			throw new FileCopyException(R.string.error_file_not_found);
+		} catch (IOException e) {
+			e.printStackTrace();
+			throw new FileCopyException(R.string.error_io_exception);
+		} finally {
+			close(os);
+			close(is);
+		}
+		Log.d(Config.LOGTAG, "output file name " + file.getAbsolutePath());
+	}
+
+	public void copyFileToPrivateStorage(Message message, Uri uri) throws FileCopyException {
+		String mime = mXmppConnectionService.getContentResolver().getType(uri);
+		Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage (mime="+mime+")");
+		String extension = MimeTypeMap.getSingleton().getExtensionFromMimeType(mime);
+		if (extension == null) {
+			extension = getExtensionFromUri(uri);
+		}
+		String filename = fileDateFormat.format(new Date(message.getTimeSent()))+"_"+message.getUuid().substring(0,4);
+		message.setRelativeFilePath(filename + "." + extension);
+		copyFileToPrivateStorage(mXmppConnectionService.getFileBackend().getFile(message), uri);
+	}
+
+	private String getExtensionFromUri(Uri uri) {
+		String[] projection = {MediaStore.MediaColumns.DATA};
+		String filename = null;
+		Cursor cursor = mXmppConnectionService.getContentResolver().query(uri, projection, null, null, null);
+		if (cursor != null) {
+			try {
+				if (cursor.moveToFirst()) {
+					filename = cursor.getString(0);
+				}
+			} catch (Exception e) {
+				filename = null;
+			} finally {
+				cursor.close();
+			}
+		}
+		int pos = filename == null ? -1 : filename.lastIndexOf('.');
+		return pos > 0 ? filename.substring(pos+1) : null;
+	}
+
+	private void copyImageToPrivateStorage(File file, Uri image, int sampleSize) throws FileCopyException {
+		file.getParentFile().mkdirs();
+		InputStream is = null;
+		OutputStream os = null;
+		try {
+			file.createNewFile();
+			is = mXmppConnectionService.getContentResolver().openInputStream(image);
+			Bitmap originalBitmap;
+			BitmapFactory.Options options = new BitmapFactory.Options();
+			int inSampleSize = (int) Math.pow(2, sampleSize);
+			Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
+			options.inSampleSize = inSampleSize;
+			originalBitmap = BitmapFactory.decodeStream(is, null, options);
+			is.close();
+			if (originalBitmap == null) {
+				throw new FileCopyException(R.string.error_not_an_image_file);
+			}
+			Bitmap scaledBitmap = resize(originalBitmap, Config.IMAGE_SIZE);
+			int rotation = getRotation(image);
+			scaledBitmap = rotate(scaledBitmap, rotation);
+			boolean targetSizeReached = false;
+			int quality = Config.IMAGE_QUALITY;
+			while(!targetSizeReached) {
+				os = new FileOutputStream(file);
+				boolean success = scaledBitmap.compress(Config.IMAGE_FORMAT, quality, os);
+				if (!success) {
+					throw new FileCopyException(R.string.error_compressing_image);
+				}
+				os.flush();
+				targetSizeReached = file.length() <= Config.IMAGE_MAX_SIZE || quality <= 50;
+				quality -= 5;
+			}
+			scaledBitmap.recycle();
+			return;
+		} catch (FileNotFoundException e) {
+			throw new FileCopyException(R.string.error_file_not_found);
+		} catch (IOException e) {
+			e.printStackTrace();
+			throw new FileCopyException(R.string.error_io_exception);
+		} catch (SecurityException e) {
+			throw new FileCopyException(R.string.error_security_exception_during_image_copy);
+		} catch (OutOfMemoryError e) {
+			++sampleSize;
+			if (sampleSize <= 3) {
+				copyImageToPrivateStorage(file, image, sampleSize);
+			} else {
+				throw new FileCopyException(R.string.error_out_of_memory);
+			}
+		} catch (NullPointerException e) {
+			throw new FileCopyException(R.string.error_io_exception);
+		} finally {
+			close(os);
+			close(is);
+		}
+	}
+
+	public void copyImageToPrivateStorage(File file, Uri image) throws FileCopyException {
+		copyImageToPrivateStorage(file, image, 0);
+	}
+
+	public void copyImageToPrivateStorage(Message message, Uri image) throws FileCopyException {
+        String filename = fileDateFormat.format(new Date(message.getTimeSent()))+"_"+message.getUuid().substring(0,4);
+		switch(Config.IMAGE_FORMAT) {
+			case JPEG:
+				message.setRelativeFilePath(filename+".jpg");
+				break;
+			case PNG:
+				message.setRelativeFilePath(filename+".png");
+				break;
+			case WEBP:
+				message.setRelativeFilePath(filename+".webp");
+				break;
+		}
+		copyImageToPrivateStorage(getFile(message), image);
+		updateFileParams(message);
+	}
+
+	private int getRotation(File file) {
+		return getRotation(Uri.parse("file://"+file.getAbsolutePath()));
+	}
+
+	private int getRotation(Uri image) {
+		InputStream is = null;
+		try {
+			is = mXmppConnectionService.getContentResolver().openInputStream(image);
+			return ExifHelper.getOrientation(is);
+		} catch (FileNotFoundException e) {
+			return 0;
+		} finally {
+			close(is);
+		}
+	}
+
+	public Bitmap getThumbnail(Message message, int size, boolean cacheOnly) throws FileNotFoundException {
+		final String uuid = message.getUuid();
+		final LruCache<String,Bitmap> cache = mXmppConnectionService.getBitmapCache();
+		Bitmap thumbnail = cache.get(uuid);
+		if ((thumbnail == null) && (!cacheOnly)) {
+			synchronized (cache) {
+				thumbnail = cache.get(uuid);
+				if (thumbnail != null) {
+					return thumbnail;
+				}
+				DownloadableFile file = getFile(message);
+				if (file.getMimeType().startsWith("video/")) {
+					thumbnail = getVideoPreview(file, size);
+				} else {
+					Bitmap fullsize = getFullsizeImagePreview(file, size);
+					if (fullsize == null) {
+						throw new FileNotFoundException();
+					}
+					thumbnail = resize(fullsize, size);
+					thumbnail = rotate(thumbnail, getRotation(file));
+				}
+				this.mXmppConnectionService.getBitmapCache().put(uuid, thumbnail);
+			}
+		}
+		return thumbnail;
+	}
+
+	private Bitmap getFullsizeImagePreview(File file, int size) {
+		BitmapFactory.Options options = new BitmapFactory.Options();
+		options.inSampleSize = calcSampleSize(file, size);
+		return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
+	}
+
+	private Bitmap getVideoPreview(File file, int size) {
+		MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
+		Bitmap frame;
+		try {
+			metadataRetriever.setDataSource(file.getAbsolutePath());
+			frame = metadataRetriever.getFrameAtTime(0);
+			metadataRetriever.release();
+			frame = resize(frame, size);
+		} catch(IllegalArgumentException e) {
+			frame = Bitmap.createBitmap(size,size, Bitmap.Config.ARGB_8888);
+			frame.eraseColor(0xff000000);
+		}
+		Canvas canvas = new Canvas(frame);
+		Bitmap play = BitmapFactory.decodeResource(mXmppConnectionService.getResources(), R.drawable.play_video);
+		float x = (frame.getWidth() - play.getWidth()) / 2.0f;
+		float y = (frame.getHeight() - play.getHeight()) / 2.0f;
+		canvas.drawBitmap(play,x,y,null);
+		return frame;
+	}
+
+	public Uri getTakePhotoUri() {
+		StringBuilder pathBuilder = new StringBuilder();
+		pathBuilder.append(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM));
+		pathBuilder.append('/');
+		pathBuilder.append("Camera");
+		pathBuilder.append('/');
+		pathBuilder.append("IMG_" + this.fileDateFormat.format(new Date()) + ".jpg");
+		Uri uri = Uri.parse("file://" + pathBuilder.toString());
+		File file = new File(uri.toString());
+		file.getParentFile().mkdirs();
+		return uri;
+	}
+
+	public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
+		try {
+			Avatar avatar = new Avatar();
+			Bitmap bm = cropCenterSquare(image, size);
+			if (bm == null) {
+				return null;
+			}
+			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
+			Base64OutputStream mBase64OutputSttream = new Base64OutputStream(
+					mByteArrayOutputStream, Base64.DEFAULT);
+			MessageDigest digest = MessageDigest.getInstance("SHA-1");
+			DigestOutputStream mDigestOutputStream = new DigestOutputStream(
+					mBase64OutputSttream, digest);
+			if (!bm.compress(format, 75, mDigestOutputStream)) {
+				return null;
+			}
+			mDigestOutputStream.flush();
+			mDigestOutputStream.close();
+			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
+			avatar.image = new String(mByteArrayOutputStream.toByteArray());
+			return avatar;
+		} catch (NoSuchAlgorithmException e) {
+			return null;
+		} catch (IOException e) {
+			return null;
+		}
+	}
+
+	public Avatar getStoredPepAvatar(String hash) {
+		if (hash == null) {
+			return null;
+		}
+		Avatar avatar = new Avatar();
+		File file = new File(getAvatarPath(hash));
+		FileInputStream is = null;
+		try {
+			BitmapFactory.Options options = new BitmapFactory.Options();
+			options.inJustDecodeBounds = true;
+			BitmapFactory.decodeFile(file.getAbsolutePath(), options);
+			is = new FileInputStream(file);
+			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
+			Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
+			MessageDigest digest = MessageDigest.getInstance("SHA-1");
+			DigestOutputStream os = new DigestOutputStream(mBase64OutputStream, digest);
+			byte[] buffer = new byte[4096];
+			int length;
+			while ((length = is.read(buffer)) > 0) {
+				os.write(buffer, 0, length);
+			}
+			os.flush();
+			os.close();
+			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
+			avatar.image = new String(mByteArrayOutputStream.toByteArray());
+			avatar.height = options.outHeight;
+			avatar.width = options.outWidth;
+			return avatar;
+		} catch (IOException e) {
+			return null;
+		} catch (NoSuchAlgorithmException e) {
+			return null;
+		} finally {
+			close(is);
+		}
+	}
+
+	public boolean isAvatarCached(Avatar avatar) {
+		File file = new File(getAvatarPath(avatar.getFilename()));
+		return file.exists();
+	}
+
+	public boolean save(Avatar avatar) {
+		File file;
+		if (isAvatarCached(avatar)) {
+			file = new File(getAvatarPath(avatar.getFilename()));
+		} else {
+			String filename = getAvatarPath(avatar.getFilename());
+			file = new File(filename + ".tmp");
+			file.getParentFile().mkdirs();
+			OutputStream os = null;
+			try {
+				file.createNewFile();
+				os = new FileOutputStream(file);
+				MessageDigest digest = MessageDigest.getInstance("SHA-1");
+				digest.reset();
+				DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
+				mDigestOutputStream.write(avatar.getImageAsBytes());
+				mDigestOutputStream.flush();
+				mDigestOutputStream.close();
+				String sha1sum = CryptoHelper.bytesToHex(digest.digest());
+				if (sha1sum.equals(avatar.sha1sum)) {
+					file.renameTo(new File(filename));
+				} else {
+					Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
+					file.delete();
+					return false;
+				}
+			} catch (IllegalArgumentException | IOException | NoSuchAlgorithmException e) {
+				return false;
+			} finally {
+				close(os);
+			}
+		}
+		avatar.size = file.length();
+		return true;
+	}
+
+	public String getAvatarPath(String avatar) {
+		return mXmppConnectionService.getFilesDir().getAbsolutePath()+ "/avatars/" + avatar;
+	}
+
+	public Uri getAvatarUri(String avatar) {
+		return Uri.parse("file:" + getAvatarPath(avatar));
+	}
+
+	public Bitmap cropCenterSquare(Uri image, int size) {
+		if (image == null) {
+			return null;
+		}
+		InputStream is = null;
+		try {
+			BitmapFactory.Options options = new BitmapFactory.Options();
+			options.inSampleSize = calcSampleSize(image, size);
+			is = mXmppConnectionService.getContentResolver().openInputStream(image);
+			if (is == null) {
+				return null;
+			}
+			Bitmap input = BitmapFactory.decodeStream(is, null, options);
+			if (input == null) {
+				return null;
+			} else {
+				input = rotate(input, getRotation(image));
+				return cropCenterSquare(input, size);
+			}
+		} catch (SecurityException e) {
+			return null; // happens for example on Android 6.0 if contacts permissions get revoked
+		} catch (FileNotFoundException e) {
+			return null;
+		} finally {
+			close(is);
+		}
+	}
+
+	public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
+		if (image == null) {
+			return null;
+		}
+		InputStream is = null;
+		try {
+			BitmapFactory.Options options = new BitmapFactory.Options();
+			options.inSampleSize = calcSampleSize(image, Math.max(newHeight, newWidth));
+			is = mXmppConnectionService.getContentResolver().openInputStream(image);
+			if (is == null) {
+				return null;
+			}
+			Bitmap source = BitmapFactory.decodeStream(is, null, options);
+			if (source == null) {
+				return null;
+			}
+			int sourceWidth = source.getWidth();
+			int sourceHeight = source.getHeight();
+			float xScale = (float) newWidth / sourceWidth;
+			float yScale = (float) newHeight / sourceHeight;
+			float scale = Math.max(xScale, yScale);
+			float scaledWidth = scale * sourceWidth;
+			float scaledHeight = scale * sourceHeight;
+			float left = (newWidth - scaledWidth) / 2;
+			float top = (newHeight - scaledHeight) / 2;
+
+			RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
+			Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
+			Canvas canvas = new Canvas(dest);
+			canvas.drawBitmap(source, null, targetRect, null);
+			if (source != null && !source.isRecycled()) {
+				source.recycle();
+			}
+			return dest;
+		} catch (SecurityException e) {
+			return null; //android 6.0 with revoked permissions for example
+		} catch (FileNotFoundException e) {
+			return null;
+		} finally {
+			close(is);
+		}
+	}
+
+	public Bitmap cropCenterSquare(Bitmap input, int size) {
+		int w = input.getWidth();
+		int h = input.getHeight();
+
+		float scale = Math.max((float) size / h, (float) size / w);
+
+		float outWidth = scale * w;
+		float outHeight = scale * h;
+		float left = (size - outWidth) / 2;
+		float top = (size - outHeight) / 2;
+		RectF target = new RectF(left, top, left + outWidth, top + outHeight);
+
+		Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
+		Canvas canvas = new Canvas(output);
+		canvas.drawBitmap(input, null, target, null);
+		if (input != null && !input.isRecycled()) {
+			input.recycle();
+		}
+		return output;
+	}
+
+	private int calcSampleSize(Uri image, int size) throws FileNotFoundException, SecurityException {
+		BitmapFactory.Options options = new BitmapFactory.Options();
+		options.inJustDecodeBounds = true;
+		BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
+		return calcSampleSize(options, size);
+	}
+
+	private static int calcSampleSize(File image, int size) {
+		BitmapFactory.Options options = new BitmapFactory.Options();
+		options.inJustDecodeBounds = true;
+		BitmapFactory.decodeFile(image.getAbsolutePath(), options);
+		return calcSampleSize(options, size);
+	}
+
+	public static int calcSampleSize(BitmapFactory.Options options, int size) {
+		int height = options.outHeight;
+		int width = options.outWidth;
+		int inSampleSize = 1;
+
+		if (height > size || width > size) {
+			int halfHeight = height / 2;
+			int halfWidth = width / 2;
+
+			while ((halfHeight / inSampleSize) > size
+					&& (halfWidth / inSampleSize) > size) {
+				inSampleSize *= 2;
+			}
+		}
+		return inSampleSize;
+	}
+
+	public Uri getJingleFileUri(Message message) {
+		File file = getFile(message);
+		return Uri.parse("file://" + file.getAbsolutePath());
+	}
+
+	public void updateFileParams(Message message) {
+		updateFileParams(message,null);
+	}
+
+	public void updateFileParams(Message message, URL url) {
+		DownloadableFile file = getFile(message);
+		final String mime = file.getMimeType();
+		boolean image = message.getType() == Message.TYPE_IMAGE || (mime != null && mime.startsWith("image/"));
+		boolean video = mime != null && mime.startsWith("video/");
+		if (image || video) {
+			try {
+				Dimensions dimensions = image ? getImageDimensions(file) : getVideoDimensions(file);
+				if (url == null) {
+					message.setBody(Long.toString(file.getSize()) + '|' + dimensions.width + '|' + dimensions.height);
+				} else {
+					message.setBody(url.toString() + "|" + Long.toString(file.getSize()) + '|' + dimensions.width + '|' + dimensions.height);
+				}
+				return;
+			} catch (NotAVideoFile notAVideoFile) {
+				Log.d(Config.LOGTAG,"file with mime type "+file.getMimeType()+" was not a video file");
+				//fall threw
+			}
+		}
+		if (url != null) {
+			message.setBody(url.toString()+"|"+Long.toString(file.getSize()));
+		} else {
+			message.setBody(Long.toString(file.getSize()));
+		}
+
+	}
+
+	private Dimensions getImageDimensions(File file) {
+		BitmapFactory.Options options = new BitmapFactory.Options();
+		options.inJustDecodeBounds = true;
+		BitmapFactory.decodeFile(file.getAbsolutePath(), options);
+		int rotation = getRotation(file);
+		boolean rotated = rotation == 90 || rotation == 270;
+		int imageHeight = rotated ? options.outWidth : options.outHeight;
+		int imageWidth = rotated ? options.outHeight : options.outWidth;
+		return new Dimensions(imageHeight, imageWidth);
+	}
+
+	private Dimensions getVideoDimensions(File file) throws NotAVideoFile {
+		MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
+		metadataRetriever.setDataSource(file.getAbsolutePath());
+		String hasVideo = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_HAS_VIDEO);
+		if (hasVideo == null) {
+			throw new NotAVideoFile();
+		}
+		int rotation = extractRotationFromMediaRetriever(metadataRetriever);
+		boolean rotated = rotation == 90 || rotation == 270;
+		int height;
+		try {
+			String h = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
+			height = Integer.parseInt(h);
+		} catch (Exception e) {
+			height = -1;
+		}
+		int width;
+		try {
+			String w = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
+			width = Integer.parseInt(w);
+		} catch (Exception e) {
+			width = -1;
+		}
+		metadataRetriever.release();
+		Log.d(Config.LOGTAG,"extracted video dims "+width+"x"+height);
+		return rotated ? new Dimensions(width, height) : new Dimensions(height, width);
+	}
+
+	private int extractRotationFromMediaRetriever(MediaMetadataRetriever metadataRetriever) {
+		int rotation;
+		if (Build.VERSION.SDK_INT >= 17) {
+			String r = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
+			try {
+				rotation = Integer.parseInt(r);
+			} catch (Exception e) {
+				rotation = 0;
+			}
+		} else {
+			rotation = 0;
+		}
+		return rotation;
+	}
+
+	private class Dimensions {
+		public final int width;
+		public final int height;
+
+		public Dimensions(int height, int width) {
+			this.width = width;
+			this.height = height;
+		}
+	}
+
+	private class NotAVideoFile extends Exception {
+
+	}
+
+	public class FileCopyException extends Exception {
+		private static final long serialVersionUID = -1010013599132881427L;
+		private int resId;
+
+		public FileCopyException(int resId) {
+			this.resId = resId;
+		}
+
+		public int getResId() {
+			return resId;
+		}
+	}
+
+	public Bitmap getAvatar(String avatar, int size) {
+		if (avatar == null) {
+			return null;
+		}
+		Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
+		if (bm == null) {
+			return null;
+		}
+		return bm;
+	}
+
+	public boolean isFileAvailable(Message message) {
+		return getFile(message).exists();
+	}
+
+	public static void close(Closeable stream) {
+		if (stream != null) {
+			try {
+				stream.close();
+			} catch (IOException e) {
+			}
+		}
+	}
+
+	public static void close(Socket socket) {
+		if (socket != null) {
+			try {
+				socket.close();
+			} catch (IOException e) {
+			}
+		}
+	}
+
+
+	public static boolean weOwnFile(Context context, Uri uri) {
+		if (uri == null || !ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {
+			return false;
+		} else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
+			return fileIsInFilesDir(context, uri);
+		} else {
+			return weOwnFileLollipop(uri);
+		}
+	}
+
+
+	/**
+	 * This is more than hacky but probably way better than doing nothing
+	 * Further 'optimizations' might contain to get the parents of CacheDir and NoBackupDir
+	 * and check against those as well
+	 */
+	private static boolean fileIsInFilesDir(Context context, Uri uri) {
+		try {
+			final String haystack = context.getFilesDir().getParentFile().getCanonicalPath();
+			final String needle = new File(uri.getPath()).getCanonicalPath();
+			return needle.startsWith(haystack);
+		} catch (IOException e) {
+			return false;
+		}
+	}
+
+	@TargetApi(Build.VERSION_CODES.LOLLIPOP)
+	private static boolean weOwnFileLollipop(Uri uri) {
+		try {
+			File file = new File(uri.getPath());
+			FileDescriptor fd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY).getFileDescriptor();
+			StructStat st = Os.fstat(fd);
+			return st.st_uid == android.os.Process.myUid();
+		} catch (FileNotFoundException e) {
+			return false;
+		} catch (Exception e) {
+			return true;
+		}
+	}
+}