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package eu.siacs.conversations.services;
import android.content.ComponentName;
import android.content.ContentProvider;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.net.Uri;
import android.os.CancellationSignal;
import android.os.IBinder;
import android.os.ParcelFileDescriptor;
import android.support.annotation.Nullable;
import android.util.Log;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.aztec.AztecWriter;
import com.google.zxing.common.BitMatrix;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.Hashtable;
import eu.siacs.conversations.Config;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.utils.CryptoHelper;
import eu.siacs.conversations.xmpp.jid.Jid;
public class BarcodeProvider extends ContentProvider implements ServiceConnection {
private static final String AUTHORITY = ".barcodes";
private final Object lock = new Object();
private XmppConnectionService mXmppConnectionService;
private boolean mBindingInProcess = false;
@Override
public boolean onCreate() {
File barcodeDirectory = new File(getContext().getCacheDir().getAbsolutePath() + "/barcodes/");
if (barcodeDirectory.exists() && barcodeDirectory.isDirectory()) {
for (File file : barcodeDirectory.listFiles()) {
if (file.isFile() && !file.isHidden()) {
Log.d(Config.LOGTAG, "deleting old barcode file " + file.getAbsolutePath());
file.delete();
}
}
}
return true;
}
@Nullable
@Override
public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
return null;
}
@Nullable
@Override
public String getType(Uri uri) {
return "image/png";
}
@Nullable
@Override
public Uri insert(Uri uri, ContentValues values) {
return null;
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
return 0;
}
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
return 0;
}
@Override
public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
return openFile(uri, mode, null);
}
@Override
public ParcelFileDescriptor openFile(Uri uri, String mode, CancellationSignal signal) throws FileNotFoundException {
Log.d(Config.LOGTAG, "opening file with uri (normal): " + uri.toString());
String path = uri.getPath();
if (path != null && path.endsWith(".png") && path.length() >= 5) {
String jid = path.substring(1).substring(0, path.length() - 4);
Log.d(Config.LOGTAG, "account:" + jid);
if (connectAndWait()) {
Log.d(Config.LOGTAG, "connected to background service");
try {
Account account = mXmppConnectionService.findAccountByJid(Jid.fromString(jid));
if (account != null) {
String shareableUri = account.getShareableUri();
String hash = CryptoHelper.getFingerprint(shareableUri);
File file = new File(getContext().getCacheDir().getAbsolutePath() + "/barcodes/" + hash);
if (!file.exists()) {
file.getParentFile().mkdirs();
file.createNewFile();
Bitmap bitmap = createAztecBitmap(account.getShareableUri(), 1024);
OutputStream outputStream = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, outputStream);
outputStream.close();
outputStream.flush();
}
return ParcelFileDescriptor.open(file,ParcelFileDescriptor.MODE_READ_ONLY);
}
} catch (Exception e) {
throw new FileNotFoundException();
}
}
}
throw new FileNotFoundException();
}
private boolean connectAndWait() {
Intent intent = new Intent(getContext(), XmppConnectionService.class);
intent.setAction(this.getClass().getSimpleName());
Context context = getContext();
if (context != null) {
synchronized (this) {
if (mXmppConnectionService == null && !mBindingInProcess) {
Log.d(Config.LOGTAG,"calling to bind service");
context.startService(intent);
context.bindService(intent, this, Context.BIND_AUTO_CREATE);
this.mBindingInProcess = true;
}
}
try {
waitForService();
return true;
} catch (InterruptedException e) {
return false;
}
} else {
Log.d(Config.LOGTAG, "context was null");
return false;
}
}
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
synchronized (this) {
XmppConnectionService.XmppConnectionBinder binder = (XmppConnectionService.XmppConnectionBinder) service;
mXmppConnectionService = binder.getService();
mBindingInProcess = false;
synchronized (this.lock) {
lock.notifyAll();
}
}
}
@Override
public void onServiceDisconnected(ComponentName name) {
synchronized (this) {
mXmppConnectionService = null;
}
}
private void waitForService() throws InterruptedException {
if (mXmppConnectionService == null) {
synchronized (this.lock) {
lock.wait();
}
} else {
Log.d(Config.LOGTAG,"not waiting for service because already initialized");
}
}
public static Uri getUriForAccount(Context context, Account account) {
final String packageId = context.getPackageName();
return Uri.parse("content://" + packageId + AUTHORITY + "/" + account.getJid().toBareJid() + ".png");
}
public static Bitmap createAztecBitmap(String input, int size) {
try {
final AztecWriter AZTEC_WRITER = new AztecWriter();
final Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
hints.put(EncodeHintType.ERROR_CORRECTION, 10);
final BitMatrix result = AZTEC_WRITER.encode(input, BarcodeFormat.AZTEC, size, size, hints);
final int width = result.getWidth();
final int height = result.getHeight();
final int[] pixels = new int[width * height];
for (int y = 0; y < height; y++) {
final int offset = y * width;
for (int x = 0; x < width; x++) {
pixels[offset + x] = result.get(x, y) ? Color.BLACK : Color.WHITE;
}
}
final Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
} catch (final Exception e) {
return null;
}
}
}
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