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package com.wireguard.android;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import com.wireguard.android.backends.VpnService;
import com.wireguard.config.Config;
/**
* Base class for activities that need to remember the current configuration and wait for a service.
*/
abstract class BaseConfigActivity extends Activity {
protected static final String KEY_CURRENT_CONFIG = "currentConfig";
protected static final String KEY_IS_EDITING = "isEditing";
private Config currentConfig;
private String initialConfig;
private boolean isEditing;
private boolean wasEditing;
protected Config getCurrentConfig() {
return currentConfig;
}
protected boolean isEditing() {
return isEditing;
}
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Restore the saved configuration if there is one; otherwise grab it from the intent.
if (savedInstanceState != null) {
initialConfig = savedInstanceState.getString(KEY_CURRENT_CONFIG);
wasEditing = savedInstanceState.getBoolean(KEY_IS_EDITING, false);
} else {
final Intent intent = getIntent();
initialConfig = intent.getStringExtra(KEY_CURRENT_CONFIG);
wasEditing = intent.getBooleanExtra(KEY_IS_EDITING, false);
}
// Trigger starting the service as early as possible
if (VpnService.getInstance() != null)
onServiceAvailable();
else
bindService(new Intent(this, VpnService.class), new ServiceConnectionCallbacks(),
Context.BIND_AUTO_CREATE);
}
protected abstract void onCurrentConfigChanged(Config config);
protected abstract void onEditingStateChanged(boolean isEditing);
@Override
public void onSaveInstanceState(final Bundle outState) {
super.onSaveInstanceState(outState);
if (currentConfig != null)
outState.putString(KEY_CURRENT_CONFIG, currentConfig.getName());
outState.putBoolean(KEY_IS_EDITING, isEditing);
}
protected void onServiceAvailable() {
// Make sure the subclass activity is initialized before setting its config.
if (initialConfig != null && currentConfig == null)
setCurrentConfig(VpnService.getInstance().get(initialConfig));
setIsEditing(wasEditing);
}
public void setCurrentConfig(final Config config) {
if (currentConfig == config)
return;
currentConfig = config;
onCurrentConfigChanged(config);
}
public void setIsEditing(final boolean isEditing) {
if (this.isEditing == isEditing)
return;
this.isEditing = isEditing;
onEditingStateChanged(isEditing);
}
private class ServiceConnectionCallbacks implements ServiceConnection {
@Override
public void onServiceConnected(final ComponentName component, final IBinder binder) {
// We don't actually need a binding, only notification that the service is started.
unbindService(this);
onServiceAvailable();
}
@Override
public void onServiceDisconnected(final ComponentName component) {
// This can never happen; the service runs in the same thread as the activity.
throw new IllegalStateException();
}
}
}
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