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package com.wireguard.android.preference;
import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Environment;
import android.support.design.widget.Snackbar;
import android.support.v7.preference.Preference;
import android.util.AttributeSet;
import android.util.Log;
import android.view.ContextThemeWrapper;
import com.wireguard.android.Application;
import com.wireguard.android.Application.ApplicationComponent;
import com.wireguard.android.R;
import com.wireguard.android.activity.SettingsActivity;
import com.wireguard.android.model.Tunnel;
import com.wireguard.android.model.TunnelManager;
import com.wireguard.android.util.AsyncWorker;
import com.wireguard.android.util.ExceptionLoggers;
import com.wireguard.config.Config;
import java.io.File;
import java.io.FileOutputStream;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import java9.util.concurrent.CompletableFuture;
/**
* Preference implementing a button that asynchronously exports config zips.
*/
public class ZipExporterPreference extends Preference {
private static final String TAG = "WireGuard/" + ZipExporterPreference.class.getSimpleName();
private final AsyncWorker asyncWorker;
private final TunnelManager tunnelManager;
private String exportedFilePath = null;
@SuppressWarnings({"SameParameterValue", "WeakerAccess"})
public ZipExporterPreference(final Context context, final AttributeSet attrs) {
super(context, attrs);
final ApplicationComponent applicationComponent = Application.getComponent();
asyncWorker = applicationComponent.getAsyncWorker();
tunnelManager = applicationComponent.getTunnelManager();
}
private void exportZip() {
List<Tunnel> tunnels = new ArrayList<>(tunnelManager.getTunnels());
List<CompletableFuture<Config>> futureConfigs = new ArrayList<>(tunnels.size());
for (final Tunnel tunnel : tunnels)
futureConfigs.add(tunnel.getConfigAsync().toCompletableFuture());
if (futureConfigs.isEmpty()) {
exportZipComplete(null, new IllegalArgumentException("No tunnels exist"));
return;
}
CompletableFuture.allOf(futureConfigs.toArray(new CompletableFuture[futureConfigs.size()]))
.whenComplete((ignored1, exception) -> {
asyncWorker.supplyAsync(() -> {
if (exception != null)
throw exception;
final File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
final File file = new File(path, "wireguard-export.zip");
try {
path.mkdirs();
final ZipOutputStream zip = new ZipOutputStream(new FileOutputStream(file));
for (int i = 0; i < futureConfigs.size(); ++i) {
zip.putNextEntry(new ZipEntry(tunnels.get(i).getName() + ".conf"));
zip.write(futureConfigs.get(i).getNow(null).
toString().getBytes(StandardCharsets.UTF_8));
}
zip.closeEntry();
zip.close();
} catch (Exception e) {
file.delete();
throw e;
}
return file.getAbsolutePath();
}).whenComplete(this::exportZipComplete);
});
}
private void exportZipComplete(String filePath, Throwable throwable) {
if (throwable != null) {
final String error = ExceptionLoggers.unwrap(throwable).getMessage();
final String message = getContext().getString(R.string.export_error, error);
Log.e(TAG, message, throwable);
Snackbar.make(
getPrefActivity(this).findViewById(android.R.id.content),
message, Snackbar.LENGTH_LONG).show();
} else {
exportedFilePath = filePath;
setEnabled(false);
notifyChanged();
}
}
private SettingsActivity getPrefActivity(Preference preference) {
Context context = preference.getContext();
if (context instanceof ContextThemeWrapper) {
if (((ContextThemeWrapper) context).getBaseContext() instanceof SettingsActivity) {
return ((SettingsActivity) ((ContextThemeWrapper) context).getBaseContext());
}
}
return null;
}
@Override
public CharSequence getSummary() {
if (exportedFilePath == null)
return getContext().getString(R.string.export_summary);
else
return getContext().getString(R.string.export_success, exportedFilePath);
}
@Override
public CharSequence getTitle() {
return getContext().getString(R.string.zip_exporter_title);
}
@Override
protected void onClick() {
getPrefActivity(this).ensurePermissions(
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
(permissions, granted) -> {
if (granted.length > 0 && granted[0] == PackageManager.PERMISSION_GRANTED)
exportZip();
});
}
}
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