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package eu.siacs.conversations.persistance;
import java.io.BufferedInputStream;
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 java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
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.entities.Conversation;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.utils.CryptoHelper;
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 File getImageFile(Message message) {
Conversation conversation = message.getConversation();
String prefix = context.getFilesDir().getAbsolutePath();
String path = prefix + "/" + conversation.getAccount().getJid() + "/"
+ conversation.getContactJid();
String filename = message.getUuid() + ".webp";
return new File(path + "/" + filename);
}
private 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 File copyImageToPrivateStorage(Message message, Uri image) {
try {
InputStream is = context.getContentResolver()
.openInputStream(image);
File file = getImageFile(message);
file.getParentFile().mkdirs();
file.createNewFile();
OutputStream os = new FileOutputStream(file);
Bitmap originalBitmap = BitmapFactory.decodeStream(is);
is.close();
Bitmap scalledBitmap = resize(originalBitmap, IMAGE_SIZE);
boolean success = scalledBitmap.compress(Bitmap.CompressFormat.WEBP,75,os);
if (!success) {
Log.d("xmppService", "couldnt compress");
}
os.close();
message.setBody(this.createSha1(file));
return file;
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
public Bitmap getImageFromMessage(Message message) {
return BitmapFactory
.decodeFile(getImageFile(message).getAbsolutePath());
}
public Bitmap getThumbnailFromMessage(Message message, int size) {
Bitmap thumbnail = thumbnailCache.get(message.getUuid());
if (thumbnail==null) {
Log.d("xmppService","creating new thumbnail" + message.getUuid());
Bitmap fullsize = BitmapFactory.decodeFile(getImageFile(message)
.getAbsolutePath());
thumbnail = resize(fullsize, size);
this.thumbnailCache.put(message.getUuid(), thumbnail);
}
return thumbnail;
}
private String createSha1(final File file) {
InputStream fis = null;
try {
MessageDigest digest = MessageDigest.getInstance("SHA-1");
fis = new FileInputStream(file);
int n = 0;
byte[] buffer = new byte[8192];
while (n != -1) {
n = fis.read(buffer);
if (n > 0) {
digest.update(buffer, 0, n);
}
}
fis.close();
return CryptoHelper.bytesToHex(digest.digest());
} catch (NoSuchAlgorithmException e) {
return null;
} catch (FileNotFoundException e) {
if (fis!=null) {
try {
fis.close();
return null;
} catch (IOException e1) {
return null;
}
}
} catch (IOException e) {
if (fis!=null) {
try {
fis.close();
return null;
} catch (IOException e1) {
return null;
}
}
}
return null;
}
}
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