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package de.danoeh.antennapod.activity;
import android.content.ComponentName;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.ParcelFileDescriptor;
import android.support.design.widget.Snackbar;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.MenuItem;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.channels.FileChannel;
import java.util.Arrays;
import de.danoeh.antennapod.R;
import de.danoeh.antennapod.core.preferences.UserPreferences;
import de.danoeh.antennapod.core.storage.PodDBAdapter;
/**
* Displays the 'import/export' screen
*/
public class ImportExportActivity extends AppCompatActivity {
private static final int REQUEST_CODE_RESTORE = 43;
private static final int REQUEST_CODE_BACKUP_DOCUMENT = 44;
private static final String EXPORT_FILENAME = "AntennaPodBackup.db";
private static final String TAG = ImportExportActivity.class.getSimpleName();
@Override
protected void onCreate(Bundle savedInstanceState) {
setTheme(UserPreferences.getTheme());
super.onCreate(savedInstanceState);
ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayShowHomeEnabled(true);
}
setContentView(R.layout.import_export_activity);
findViewById(R.id.button_export).setOnClickListener(view -> backup());
findViewById(R.id.button_import).setOnClickListener(view -> restore());
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
finish();
return true;
} else {
return super.onOptionsItemSelected(item);
}
}
private void backup() {
if (Build.VERSION.SDK_INT >= 19) {
Intent intent = new Intent(Intent.ACTION_CREATE_DOCUMENT)
.addCategory(Intent.CATEGORY_OPENABLE)
.setType("application/x-sqlite3")
.putExtra(Intent.EXTRA_TITLE, EXPORT_FILENAME);
startActivityForResult(intent, REQUEST_CODE_BACKUP_DOCUMENT);
} else {
try {
File sd = Environment.getExternalStorageDirectory();
File backupDB = new File(sd, EXPORT_FILENAME);
writeBackupTo(new FileOutputStream(backupDB));
} catch (IOException e) {
Log.e(TAG, Log.getStackTraceString(e));
Snackbar.make(findViewById(R.id.import_export_layout), e.getLocalizedMessage(), Snackbar.LENGTH_SHORT).show();
}
}
}
private void restore() {
if (Build.VERSION.SDK_INT >= 19) {
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.setType("*/*");
startActivityForResult(intent, REQUEST_CODE_RESTORE);
} else {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("*/*");
startActivityForResult(Intent.createChooser(intent,
getString(R.string.import_select_file)), REQUEST_CODE_RESTORE);
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent resultData) {
if (resultCode != RESULT_OK || resultData == null) {
return;
}
Uri uri = resultData.getData();
if (requestCode == REQUEST_CODE_RESTORE) {
restoreFrom(uri);
} else if (requestCode == REQUEST_CODE_BACKUP_DOCUMENT) {
backupToDocument(uri);
}
}
private void restoreFrom(Uri inputUri) {
InputStream inputStream = null;
try {
if (!validateDB(inputUri)) {
displayBadFileDialog();
return;
}
File currentDB = getDatabasePath(PodDBAdapter.DATABASE_NAME);
inputStream = getContentResolver().openInputStream(inputUri);
FileUtils.copyInputStreamToFile(inputStream, currentDB);
displayImportSuccessDialog();
} catch (IOException e) {
Log.e(TAG, Log.getStackTraceString(e));
Snackbar.make(findViewById(R.id.import_export_layout), e.getLocalizedMessage(), Snackbar.LENGTH_SHORT).show();
} finally {
IOUtils.closeQuietly(inputStream);
}
}
private static final byte[] SQLITE3_MAGIC = "SQLite format 3\0".getBytes();
private boolean validateDB(Uri inputUri) throws IOException {
try (InputStream inputStream = getContentResolver().openInputStream(inputUri)) {
byte[] magicBuf = new byte[SQLITE3_MAGIC.length];
if (inputStream.read(magicBuf) == magicBuf.length) {
return Arrays.equals(SQLITE3_MAGIC, magicBuf);
}
}
return false;
}
private void displayBadFileDialog() {
AlertDialog.Builder d = new AlertDialog.Builder(ImportExportActivity.this);
d.setMessage(R.string.import_bad_file)
.setCancelable(false)
.setPositiveButton(android.R.string.ok, ((dialogInterface, i) -> {
// do nothing
}))
.show();
}
private void displayImportSuccessDialog() {
AlertDialog.Builder d = new AlertDialog.Builder(ImportExportActivity.this);
d.setMessage(R.string.import_ok);
d.setCancelable(false);
d.setPositiveButton(android.R.string.ok, (dialogInterface, i) -> {
Intent intent = new Intent(getApplicationContext(), SplashActivity.class);
ComponentName cn = intent.getComponent();
Intent mainIntent = Intent.makeRestartActivityTask(cn);
startActivity(mainIntent);
});
d.show();
}
private void backupToDocument(Uri uri) {
ParcelFileDescriptor pfd = null;
FileOutputStream fileOutputStream = null;
try {
pfd = getContentResolver().openFileDescriptor(uri, "w");
fileOutputStream = new FileOutputStream(pfd.getFileDescriptor());
writeBackupTo(fileOutputStream);
Snackbar.make(findViewById(R.id.import_export_layout),
R.string.export_ok, Snackbar.LENGTH_SHORT).show();
} catch (IOException e) {
Log.e(TAG, Log.getStackTraceString(e));
Snackbar.make(findViewById(R.id.import_export_layout), e.getLocalizedMessage(), Snackbar.LENGTH_SHORT).show();
} finally {
IOUtils.closeQuietly(fileOutputStream);
if (pfd != null) {
try {
pfd.close();
} catch (IOException e) {
Log.d(TAG, "Unable to close ParcelFileDescriptor");
}
}
}
}
private void writeBackupTo(FileOutputStream outFileStream) {
FileChannel src = null;
FileChannel dst = null;
try {
File currentDB = getDatabasePath(PodDBAdapter.DATABASE_NAME);
if (currentDB.exists()) {
src = new FileInputStream(currentDB).getChannel();
dst = outFileStream.getChannel();
dst.transferFrom(src, 0, src.size());
Snackbar.make(findViewById(R.id.import_export_layout),
R.string.export_ok, Snackbar.LENGTH_SHORT).show();
} else {
Snackbar.make(findViewById(R.id.import_export_layout),
"Can not access current database", Snackbar.LENGTH_SHORT).show();
}
} catch (IOException e) {
Log.e(TAG, Log.getStackTraceString(e));
Snackbar.make(findViewById(R.id.import_export_layout), e.getLocalizedMessage(), Snackbar.LENGTH_SHORT).show();
} finally {
IOUtils.closeQuietly(src);
IOUtils.closeQuietly(dst);
}
}
}
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