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package com.wireguard.android.fragment;
import android.app.Activity;
import android.content.Context;
import android.databinding.ObservableField;
import android.os.Bundle;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import com.commonsware.cwac.crossport.design.widget.CoordinatorLayout;
import com.commonsware.cwac.crossport.design.widget.Snackbar;
import com.wireguard.android.Application;
import com.wireguard.android.R;
import com.wireguard.android.databinding.ConfigEditorFragmentBinding;
import com.wireguard.android.model.Tunnel;
import com.wireguard.android.model.TunnelManager;
import com.wireguard.android.util.ExceptionLoggers;
import com.wireguard.config.Config;
/**
* Fragment for editing a WireGuard configuration.
*/
public class ConfigEditorFragment extends BaseFragment {
private static final String KEY_LOCAL_CONFIG = "local_config";
private static final String KEY_LOCAL_NAME = "local_name";
private static final String TAG = ConfigEditorFragment.class.getSimpleName();
private final ObservableField<String> localName = new ObservableField<>();
private ConfigEditorFragmentBinding binding;
private boolean isViewStateRestored;
private Config localConfig = new Config();
private String originalName;
private static <T extends Parcelable> T copyParcelable(final T original) {
if (original == null)
return null;
final Parcel parcel = Parcel.obtain();
parcel.writeParcelable(original, 0);
parcel.setDataPosition(0);
final T copy = parcel.readParcelable(original.getClass().getClassLoader());
parcel.recycle();
return copy;
}
private void onConfigCreated(final Tunnel tunnel, final Throwable throwable) {
if (throwable != null) {
Log.e(TAG, "Cannot create tunnel", throwable);
final String message = "Cannot create tunnel: "
+ ExceptionLoggers.unwrap(throwable).getMessage();
if (binding != null) {
final CoordinatorLayout container = binding.mainContainer;
Snackbar.make(container, message, Snackbar.LENGTH_LONG).show();
}
} else {
Log.d(TAG, "Successfully created tunnel " + tunnel.getName());
onFinished(tunnel);
}
}
private void onConfigLoaded(final Config config) {
localConfig = copyParcelable(config);
if (binding != null && isViewStateRestored)
binding.setConfig(localConfig);
}
private void onConfigSaved(final Config config, final Throwable throwable) {
if (throwable != null) {
Log.e(TAG, "Cannot save configuration", throwable);
final String message = "Cannot save configuration: "
+ ExceptionLoggers.unwrap(throwable).getMessage();
if (binding != null) {
final CoordinatorLayout container = binding.mainContainer;
Snackbar.make(container, message, Snackbar.LENGTH_LONG).show();
}
} else {
Log.d(TAG, "Successfully saved configuration for " + getSelectedTunnel().getName());
onFinished(getSelectedTunnel());
}
}
@Override
public void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState != null) {
localConfig = savedInstanceState.getParcelable(KEY_LOCAL_CONFIG);
localName.set(savedInstanceState.getString(KEY_LOCAL_NAME));
originalName = savedInstanceState.getString(TunnelManager.KEY_SELECTED_TUNNEL);
}
// Erase the remains of creating or editing a different tunnel.
if (getSelectedTunnel() != null && !getSelectedTunnel().getName().equals(originalName)) {
// The config must be loaded asynchronously since it's not an observable property.
localConfig = null;
getSelectedTunnel().getConfigAsync().thenAccept(this::onConfigLoaded);
originalName = getSelectedTunnel().getName();
localName.set(originalName);
} else if (getSelectedTunnel() == null && originalName != null) {
localConfig = new Config();
originalName = null;
localName.set(null);
}
setHasOptionsMenu(true);
}
@Override
public void onCreateOptionsMenu(final Menu menu, final MenuInflater inflater) {
inflater.inflate(R.menu.config_editor, menu);
}
@Override
public View onCreateView(final LayoutInflater inflater, final ViewGroup container,
final Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
binding = ConfigEditorFragmentBinding.inflate(inflater, container, false);
binding.executePendingBindings();
return binding.getRoot();
}
@Override
public void onDestroyView() {
binding = null;
super.onDestroyView();
}
private void onFinished(final Tunnel tunnel) {
// Hide the keyboard; it rarely goes away on its own.
final Activity activity = getActivity();
final View focusedView = activity.getCurrentFocus();
if (focusedView != null) {
final Object service = activity.getSystemService(Context.INPUT_METHOD_SERVICE);
final InputMethodManager inputManager = (InputMethodManager) service;
if (inputManager != null)
inputManager.hideSoftInputFromWindow(focusedView.getWindowToken(),
InputMethodManager.HIDE_NOT_ALWAYS);
}
// Tell the activity to finish itself or go back to the detail view.
getActivity().runOnUiThread(() -> {
setSelectedTunnel(null);
setSelectedTunnel(tunnel);
});
}
@Override
public boolean onOptionsItemSelected(final MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_action_save:
if (getSelectedTunnel() != null) {
Log.d(TAG, "Attempting to save config to " + getSelectedTunnel().getName());
getSelectedTunnel().setConfig(localConfig)
.whenComplete(this::onConfigSaved);
} else {
Log.d(TAG, "Attempting to create new tunnel " + localName.get());
final TunnelManager manager = Application.getComponent().getTunnelManager();
manager.create(localName.get(), localConfig)
.whenComplete(this::onConfigCreated);
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public void onSaveInstanceState(final Bundle outState) {
outState.putParcelable(KEY_LOCAL_CONFIG, localConfig);
outState.putString(KEY_LOCAL_NAME, localName.get());
outState.putString(TunnelManager.KEY_SELECTED_TUNNEL, originalName);
super.onSaveInstanceState(outState);
}
@Override
public void onSelectedTunnelChanged(final Tunnel oldTunnel, final Tunnel newTunnel) {
// Erase the remains of creating or editing a different tunnel.
if (newTunnel != null) {
// The config must be loaded asynchronously since it's not an observable property.
localConfig = null;
newTunnel.getConfigAsync().thenAccept(this::onConfigLoaded);
originalName = newTunnel.getName();
} else {
localConfig = new Config();
if (binding != null && isViewStateRestored)
binding.setConfig(localConfig);
originalName = null;
}
localName.set(originalName);
}
@Override
public void onViewStateRestored(final Bundle savedInstanceState) {
super.onViewStateRestored(savedInstanceState);
binding.setConfig(localConfig);
binding.setName(localName);
// FIXME: Remove this when renaming works.
binding.interfaceNameText.setEnabled(originalName == null);
isViewStateRestored = true;
}
}
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