Conversations/src/main/java/eu/siacs/conversations/persistance/FileBackend.java

431 lines
13 KiB
Java

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) {
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();
}
}