1 files changed, 447 insertions, 0 deletions
diff --git a/src/main/java/eu/siacs/conversations/persistance/FileBackend.java b/src/main/java/eu/siacs/conversations/persistance/FileBackend.java
new file mode 100644
index 00000000..13daa27b
--- /dev/null
+++ b/src/main/java/eu/siacs/conversations/persistance/FileBackend.java
@@ -0,0 +1,447 @@
+package eu.siacs.conversations.persistance;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.security.DigestOutputStream;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+
+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.net.Uri;
+import android.os.Environment;
+import android.provider.MediaStore;
+import android.util.Base64;
+import android.util.Base64OutputStream;
+import android.util.Log;
+import eu.siacs.conversations.Config;
+import eu.siacs.conversations.R;
+import eu.siacs.conversations.entities.DownloadableFile;
+import eu.siacs.conversations.entities.Message;
+import eu.siacs.conversations.services.XmppConnectionService;
+import eu.siacs.conversations.utils.CryptoHelper;
+import eu.siacs.conversations.utils.ExifHelper;
+import eu.siacs.conversations.xmpp.pep.Avatar;
+
+public class FileBackend {
+
+	private static int IMAGE_SIZE = 1920;
+
+	private SimpleDateFormat imageDateFormat = new SimpleDateFormat(
+			"yyyyMMdd_HHmmssSSS", Locale.US);
+
+	private XmppConnectionService mXmppConnectionService;
+
+	public FileBackend(XmppConnectionService service) {
+		this.mXmppConnectionService = service;
+	}
+
+	public DownloadableFile getFile(Message message) {
+		return getFile(message, true);
+	}
+
+	public DownloadableFile getFile(Message message, boolean decrypted) {
+		StringBuilder filename = new StringBuilder();
+		filename.append(getConversationsDirectory());
+		filename.append(message.getUuid());
+		if ((decrypted) || (message.getEncryption() == Message.ENCRYPTION_NONE)) {
+			filename.append(".webp");
+		} else {
+			if (message.getEncryption() == Message.ENCRYPTION_OTR) {
+				filename.append(".webp");
+			} else {
+				filename.append(".webp.pgp");
+			}
+		}
+		return new DownloadableFile(filename.toString());
+	}
+
+	public static String getConversationsDirectory() {
+		return Environment.getExternalStoragePublicDirectory(
+				Environment.DIRECTORY_PICTURES).getAbsolutePath()
+				+ "/Conversations/";
+	}
+
+	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 scalledBitmap = Bitmap.createScaledBitmap(originalBitmap,
+					scalledW, scalledH, true);
+			return scalledBitmap;
+		} else {
+			return originalBitmap;
+		}
+	}
+
+	public Bitmap rotate(Bitmap bitmap, int degree) {
+		int w = bitmap.getWidth();
+		int h = bitmap.getHeight();
+		Matrix mtx = new Matrix();
+		mtx.postRotate(degree);
+		return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
+	}
+
+	public DownloadableFile copyImageToPrivateStorage(Message message, Uri image)
+			throws ImageCopyException {
+		return this.copyImageToPrivateStorage(message, image, 0);
+	}
+
+	private DownloadableFile copyImageToPrivateStorage(Message message,
+			Uri image, int sampleSize) throws ImageCopyException {
+		try {
+			InputStream is = mXmppConnectionService.getContentResolver()
+					.openInputStream(image);
+			DownloadableFile file = getFile(message);
+			file.getParentFile().mkdirs();
+			file.createNewFile();
+			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 ImageCopyException(R.string.error_not_an_image_file);
+			}
+			Bitmap scalledBitmap = resize(originalBitmap, IMAGE_SIZE);
+			originalBitmap = null;
+			int rotation = getRotation(image);
+			if (rotation > 0) {
+				scalledBitmap = rotate(scalledBitmap, rotation);
+			}
+			OutputStream os = new FileOutputStream(file);
+			boolean success = scalledBitmap.compress(
+					Bitmap.CompressFormat.WEBP, 75, os);
+			if (!success) {
+				throw new ImageCopyException(R.string.error_compressing_image);
+			}
+			os.flush();
+			os.close();
+			long size = file.getSize();
+			int width = scalledBitmap.getWidth();
+			int height = scalledBitmap.getHeight();
+			message.setBody(Long.toString(size) + ',' + width + ',' + height);
+			return file;
+		} catch (FileNotFoundException e) {
+			throw new ImageCopyException(R.string.error_file_not_found);
+		} catch (IOException e) {
+			throw new ImageCopyException(R.string.error_io_exception);
+		} catch (SecurityException e) {
+			throw new ImageCopyException(
+					R.string.error_security_exception_during_image_copy);
+		} catch (OutOfMemoryError e) {
+			++sampleSize;
+			if (sampleSize <= 3) {
+				return copyImageToPrivateStorage(message, image, sampleSize);
+			} else {
+				throw new ImageCopyException(R.string.error_out_of_memory);
+			}
+		}
+	}
+
+	private int getRotation(Uri image) {
+		if ("content".equals(image.getScheme())) {
+			try {
+				Cursor cursor = mXmppConnectionService
+						.getContentResolver()
+						.query(image,
+								new String[] { MediaStore.Images.ImageColumns.ORIENTATION },
+								null, null, null);
+				if (cursor.getCount() != 1) {
+					return -1;
+				}
+				cursor.moveToFirst();
+				return cursor.getInt(0);
+			} catch (IllegalArgumentException e) {
+				return -1;
+			}
+		} else {
+			try {
+				InputStream is = mXmppConnectionService.getContentResolver()
+						.openInputStream(image);
+				return ExifHelper.getOrientation(is);
+			} catch (FileNotFoundException e) {
+				return 0;
+			}
+		}
+	}
+
+	public Bitmap getImageFromMessage(Message message) {
+		return BitmapFactory.decodeFile(getFile(message).getAbsolutePath());
+	}
+
+	public Bitmap getThumbnail(Message message, int size, boolean cacheOnly)
+			throws FileNotFoundException {
+		Bitmap thumbnail = mXmppConnectionService.getBitmapCache().get(
+				message.getUuid());
+		if ((thumbnail == null) && (!cacheOnly)) {
+			File file = getFile(message);
+			BitmapFactory.Options options = new BitmapFactory.Options();
+			options.inSampleSize = calcSampleSize(file, size);
+			Bitmap fullsize = BitmapFactory.decodeFile(file.getAbsolutePath(),
+					options);
+			if (fullsize == null) {
+				throw new FileNotFoundException();
+			}
+			thumbnail = resize(fullsize, size);
+			this.mXmppConnectionService.getBitmapCache().put(message.getUuid(),
+					thumbnail);
+		}
+		return thumbnail;
+	}
+
+	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.imageDateFormat.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 boolean isAvatarCached(Avatar avatar) {
+		File file = new File(getAvatarPath(avatar.getFilename()));
+		return file.exists();
+	}
+
+	public boolean save(Avatar avatar) {
+		if (isAvatarCached(avatar)) {
+			return true;
+		}
+		String filename = getAvatarPath(avatar.getFilename());
+		File file = new File(filename + ".tmp");
+		file.getParentFile().mkdirs();
+		try {
+			file.createNewFile();
+			FileOutputStream mFileOutputStream = new FileOutputStream(file);
+			MessageDigest digest = MessageDigest.getInstance("SHA-1");
+			digest.reset();
+			DigestOutputStream mDigestOutputStream = new DigestOutputStream(
+					mFileOutputStream, digest);
+			mDigestOutputStream.write(avatar.getImageAsBytes());
+			mDigestOutputStream.flush();
+			mDigestOutputStream.close();
+			avatar.size = file.length();
+			String sha1sum = CryptoHelper.bytesToHex(digest.digest());
+			if (sha1sum.equals(avatar.sha1sum)) {
+				file.renameTo(new File(filename));
+				return true;
+			} else {
+				Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
+				file.delete();
+				return false;
+			}
+		} catch (FileNotFoundException e) {
+			return false;
+		} catch (IOException e) {
+			return false;
+		} catch (NoSuchAlgorithmException e) {
+			return false;
+		}
+	}
+
+	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) {
+		try {
+			BitmapFactory.Options options = new BitmapFactory.Options();
+			options.inSampleSize = calcSampleSize(image, size);
+			InputStream is = mXmppConnectionService.getContentResolver()
+					.openInputStream(image);
+			Bitmap input = BitmapFactory.decodeStream(is, null, options);
+			if (input == null) {
+				return null;
+			} else {
+				int rotation = getRotation(image);
+				if (rotation > 0) {
+					input = rotate(input, rotation);
+				}
+				return cropCenterSquare(input, size);
+			}
+		} catch (FileNotFoundException e) {
+			return null;
+		}
+	}
+
+	public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
+		try {
+			BitmapFactory.Options options = new BitmapFactory.Options();
+			options.inSampleSize = calcSampleSize(image,
+					Math.max(newHeight, newWidth));
+			InputStream is = mXmppConnectionService.getContentResolver()
+					.openInputStream(image);
+			Bitmap source = BitmapFactory.decodeStream(is, null, options);
+
+			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,
+					source.getConfig());
+			Canvas canvas = new Canvas(dest);
+			canvas.drawBitmap(source, null, targetRect, null);
+
+			return dest;
+		} catch (FileNotFoundException e) {
+			return null;
+		}
+
+	}
+
+	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, input.getConfig());
+		Canvas canvas = new Canvas(output);
+		canvas.drawBitmap(input, null, target, null);
+		return output;
+	}
+
+	private int calcSampleSize(Uri image, int size)
+			throws FileNotFoundException {
+		BitmapFactory.Options options = new BitmapFactory.Options();
+		options.inJustDecodeBounds = true;
+		BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver()
+				.openInputStream(image), null, options);
+		return calcSampleSize(options, size);
+	}
+
+	private int calcSampleSize(File image, int size) {
+		BitmapFactory.Options options = new BitmapFactory.Options();
+		options.inJustDecodeBounds = true;
+		BitmapFactory.decodeFile(image.getAbsolutePath(), options);
+		return calcSampleSize(options, size);
+	}
+
+	private 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 class ImageCopyException extends Exception {
+		private static final long serialVersionUID = -1010013599132881427L;
+		private int resId;
+
+		public ImageCopyException(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();
+	}
+}