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/*
* Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
package com.wireguard.android;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Handler;
import android.os.Looper;
import android.preference.PreferenceManager;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatDelegate;
import com.wireguard.android.backend.Backend;
import com.wireguard.android.backend.GoBackend;
import com.wireguard.android.backend.WgQuickBackend;
import com.wireguard.android.configStore.ConfigStore;
import com.wireguard.android.configStore.FileConfigStore;
import com.wireguard.android.model.TunnelManager;
import com.wireguard.android.util.AsyncWorker;
import com.wireguard.android.util.RootShell;
import com.wireguard.android.util.ToolsInstaller;
import java.io.File;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Objects;
import java.util.concurrent.Executor;
public class Application extends android.app.Application {
@SuppressWarnings("NullableProblems") private static WeakReference<Application> weakSelf;
@SuppressWarnings("NullableProblems") private AsyncWorker asyncWorker;
@SuppressWarnings("NullableProblems") private RootShell rootShell;
@SuppressWarnings("NullableProblems") private SharedPreferences sharedPreferences;
@SuppressWarnings("NullableProblems") private ToolsInstaller toolsInstaller;
@SuppressWarnings("NullableProblems") private TunnelManager tunnelManager;
@SuppressWarnings("NullableProblems") private Handler handler;
@Nullable private Backend backend;
@Nullable private Collection<BackendCallback> haveBackendCallbacks = new ArrayList<>();
private final Object haveBackendCallbacksLock = new Object();
public Application() {
weakSelf = new WeakReference<>(this);
}
public static Application get() {
return weakSelf.get();
}
public static AsyncWorker getAsyncWorker() {
return get().asyncWorker;
}
public static Backend getBackend() {
final Application app = get();
synchronized (app) {
if (app.backend == null) {
if (new File("/sys/module/wireguard").exists()) {
try {
app.rootShell.start();
app.backend = new WgQuickBackend(app.getApplicationContext());
} catch (final Exception ignored) { }
}
if (app.backend == null)
app.backend = new GoBackend(app.getApplicationContext());
synchronized (app.haveBackendCallbacksLock) {
if (app.haveBackendCallbacks != null) {
for (final BackendCallback callback : app.haveBackendCallbacks)
app.handler.post(() -> callback.callback(app.backend));
app.haveBackendCallbacks = null;
}
}
}
return app.backend;
}
}
@FunctionalInterface
public interface BackendCallback {
void callback(final Backend backend);
}
public static void onHaveBackend(final BackendCallback callback) {
final Application app = get();
synchronized (app.haveBackendCallbacksLock) {
if (app.haveBackendCallbacks == null) {
Objects.requireNonNull(app.backend, "Backend still null in onHaveBackend call");
callback.callback(app.backend);
} else {
app.haveBackendCallbacks.add(callback);
}
}
}
public static RootShell getRootShell() {
return get().rootShell;
}
public static SharedPreferences getSharedPreferences() {
return get().sharedPreferences;
}
public static ToolsInstaller getToolsInstaller() {
return get().toolsInstaller;
}
public static TunnelManager getTunnelManager() {
return get().tunnelManager;
}
@Override
public void onCreate() {
super.onCreate();
handler = new Handler(Looper.getMainLooper());
final Executor executor = AsyncTask.SERIAL_EXECUTOR;
final ConfigStore configStore = new FileConfigStore(getApplicationContext());
asyncWorker = new AsyncWorker(executor, handler);
rootShell = new RootShell(getApplicationContext());
toolsInstaller = new ToolsInstaller(getApplicationContext());
sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
AppCompatDelegate.setDefaultNightMode(
sharedPreferences.getBoolean("dark_theme", false) ?
AppCompatDelegate.MODE_NIGHT_YES : AppCompatDelegate.MODE_NIGHT_NO);
tunnelManager = new TunnelManager(configStore);
asyncWorker.runAsync(Application::getBackend);
tunnelManager.onCreate();
}
}
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