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/*
* Copyright (C) 2016 Andrew Comminos <andrew@comminos.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package se.lublin.mumla.preference;
import static android.os.Build.VERSION.SDK_INT;
import android.Manifest;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.widget.Toast;
import androidx.activity.result.ActivityResultLauncher;
import androidx.activity.result.contract.ActivityResultContracts.CreateDocument;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import androidx.documentfile.provider.DocumentFile;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.List;
import se.lublin.mumla.Constants;
import se.lublin.mumla.R;
import se.lublin.mumla.db.DatabaseCertificate;
import se.lublin.mumla.db.MumlaDatabase;
import se.lublin.mumla.db.MumlaSQLiteDatabase;
/**
* Created by andrew on 12/01/16.
*/
public class CertificateExportActivity extends AppCompatActivity implements DialogInterface.OnClickListener {
/**
* The name of the directory to export to on external storage.
*/
private static final String EXTERNAL_STORAGE_DIR = "Mumla";
private MumlaDatabase mDatabase;
private List<DatabaseCertificate> mCertificates;
private final ActivityResultLauncher<String> documentCreator =
registerForActivityResult(new CreateDocument(), this::onDocumentCreated);
private static final int PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE = 2;
private DatabaseCertificate mCertificatePending = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mDatabase = new MumlaSQLiteDatabase(this);
mCertificates = mDatabase.getCertificates();
CharSequence[] labels = new CharSequence[mCertificates.size()];
for (int i = 0; i < labels.length; i++) {
labels[i] = mCertificates.get(i).getName();
}
AlertDialog.Builder adb = new AlertDialog.Builder(this);
adb.setTitle(R.string.pref_export_certificate_title);
adb.setItems(labels, this);
adb.setOnCancelListener(new DialogInterface.OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
finish();
}
});
adb.show();
}
@Override
protected void onDestroy() {
super.onDestroy();
mDatabase.close();
}
@Override
public void onClick(DialogInterface dialog, int which) {
DatabaseCertificate certificate = mCertificates.get(which);
if (SDK_INT >= Build.VERSION_CODES.R) {
// TODO Should always use this method?
mCertificatePending = certificate;
documentCreator.launch(certificate.getName());
} else {
saveCertificateClassic(certificate);
}
}
private void onDocumentCreated(Uri uri) {
if (uri != null && mCertificatePending != null) {
try {
OutputStream os = getContentResolver().openOutputStream(uri);
DocumentFile df = DocumentFile.fromSingleUri(this, uri);
writeCertificate(os, mCertificatePending, df != null ? df.getName() : "<unknown>");
} catch (FileNotFoundException e) {
showErrorDialog(R.string.externalStorageUnavailable);
Log.w(Constants.TAG, "FileNotFound on output file picked by user?!");
}
} else if (mCertificatePending == null) {
Log.w(Constants.TAG, "No pending certificate after user picked output file");
}
finish();
}
private void saveCertificateClassic(DatabaseCertificate certificate) {
if (ContextCompat.checkSelfPermission(CertificateExportActivity.this,
Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(CertificateExportActivity.this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE);
mCertificatePending = certificate;
return;
}
if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
showErrorDialog(R.string.externalStorageUnavailable);
return;
}
File storageDirectory = Environment.getExternalStorageDirectory();
File mumlaDirectory = new File(storageDirectory, EXTERNAL_STORAGE_DIR);
if (!mumlaDirectory.exists() && !mumlaDirectory.mkdir()) {
showErrorDialog(R.string.externalStorageUnavailable);
return;
}
File outputFile = new File(mumlaDirectory, certificate.getName());
FileOutputStream fos;
try {
fos = new FileOutputStream(outputFile);
} catch (FileNotFoundException e) {
showErrorDialog(R.string.externalStorageUnavailable);
return;
}
writeCertificate(fos, certificate, outputFile.getAbsolutePath());
finish();
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
@NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
if (mCertificatePending != null) {
saveCertificateClassic(mCertificatePending);
} else {
Log.w(Constants.TAG, "No pending certificate after permission was granted");
}
} else {
Toast.makeText(CertificateExportActivity.this, getString(R.string.grant_perm_storage),
Toast.LENGTH_LONG).show();
}
mCertificatePending = null;
}
}
private void writeCertificate(OutputStream fos, DatabaseCertificate cert, String path) {
byte[] data = mDatabase.getCertificateData(cert.getId());
try {
BufferedOutputStream bos = new BufferedOutputStream(fos);
bos.write(data);
bos.close();
Toast.makeText(this, getString(R.string.export_success, path), Toast.LENGTH_LONG).show();
} catch (IOException e) {
e.printStackTrace();
showErrorDialog(R.string.error_writing_to_storage);
}
}
private void showErrorDialog(int resourceId) {
AlertDialog.Builder errorDialog = new AlertDialog.Builder(this);
errorDialog.setMessage(resourceId);
errorDialog.setPositiveButton(android.R.string.ok, null);
errorDialog.show();
}
}
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