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package eu.siacs.conversations.persistance;
import java.io.File;
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 android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.util.Log;
import android.util.LruCache;
import eu.siacs.conversations.R;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.xmpp.jingle.JingleFile;
public class FileBackend {
private static int IMAGE_SIZE = 1920;
private Context context;
private LruCache<String, Bitmap> thumbnailCache;
public FileBackend(Context context) {
this.context = context;
int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
int cacheSize = maxMemory / 8;
thumbnailCache = new LruCache<String, Bitmap>(cacheSize) {
@Override
protected int sizeOf(String key, Bitmap bitmap) {
return bitmap.getByteCount() / 1024;
}
};
}
public LruCache<String, Bitmap> getThumbnailCache() {
return thumbnailCache;
}
public JingleFile getJingleFile(Message message) {
return getJingleFile(message, true);
}
public JingleFile getJingleFile(Message message, boolean decrypted) {
Conversation conversation = message.getConversation();
String prefix = context.getFilesDir().getAbsolutePath();
String path = prefix + "/" + conversation.getAccount().getJid() + "/"
+ conversation.getContactJid();
String filename;
if ((decrypted) || (message.getEncryption() == Message.ENCRYPTION_NONE)) {
filename = message.getUuid() + ".webp";
} else {
if (message.getEncryption() == Message.ENCRYPTION_OTR) {
filename = message.getUuid() + ".webp";
} else {
filename = message.getUuid() + ".webp.pgp";
}
}
return new JingleFile(path + "/" + filename);
}
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 JingleFile copyImageToPrivateStorage(Message message, Uri image) throws ImageCopyException {
return this.copyImageToPrivateStorage(message, image,0);
}
private JingleFile copyImageToPrivateStorage(Message message, Uri image, int sampleSize)
throws ImageCopyException {
try {
InputStream is;
if (image != null) {
is = context.getContentResolver().openInputStream(image);
} else {
is = new FileInputStream(getIncomingFile());
}
JingleFile file = getJingleFile(message);
file.getParentFile().mkdirs();
file.createNewFile();
Bitmap originalBitmap;
BitmapFactory.Options options = new BitmapFactory.Options();
int inSampleSize = (int) Math.pow(2, sampleSize);
Log.d("xmppService","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);
}
if (image == null) {
getIncomingFile().delete();
}
Bitmap scalledBitmap = resize(originalBitmap, IMAGE_SIZE);
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("" + 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);
}
}
}
public Bitmap getImageFromMessage(Message message) {
return BitmapFactory.decodeFile(getJingleFile(message)
.getAbsolutePath());
}
public Bitmap getThumbnail(Message message, int size, boolean cacheOnly)
throws FileNotFoundException {
Bitmap thumbnail = thumbnailCache.get(message.getUuid());
if ((thumbnail == null) && (!cacheOnly)) {
Bitmap fullsize = BitmapFactory.decodeFile(getJingleFile(message)
.getAbsolutePath());
if (fullsize == null) {
throw new FileNotFoundException();
}
thumbnail = resize(fullsize, size);
this.thumbnailCache.put(message.getUuid(), thumbnail);
}
return thumbnail;
}
public void removeFiles(Conversation conversation) {
String prefix = context.getFilesDir().getAbsolutePath();
String path = prefix + "/" + conversation.getAccount().getJid() + "/"
+ conversation.getContactJid();
File file = new File(path);
try {
this.deleteFile(file);
} catch (IOException e) {
Log.d("xmppService",
"error deleting file: " + file.getAbsolutePath());
}
}
private void deleteFile(File f) throws IOException {
if (f.isDirectory()) {
for (File c : f.listFiles())
deleteFile(c);
}
f.delete();
}
public File getIncomingFile() {
return new File(context.getFilesDir().getAbsolutePath() + "/incoming");
}
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;
}
}
}
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