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/*
* Copyright © 2018 Samuel Holland <samuel@sholland.org>
* Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
* SPDX-License-Identifier: GPL-2.0-or-later
*/
package com.wireguard.android.fragment;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.Snackbar;
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 android.widget.Toast;
import com.wireguard.android.Application;
import com.wireguard.android.R;
import com.wireguard.android.databinding.TunnelEditorFragmentBinding;
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 TunnelEditorFragment extends BaseFragment {
private static final String KEY_LOCAL_CONFIG = "local_config";
private static final String KEY_ORIGINAL_NAME = "original_name";
private static final String TAG = "WireGuard/" + TunnelEditorFragment.class.getSimpleName();
private TunnelEditorFragmentBinding binding;
private Tunnel tunnel;
private void onConfigLoaded(final String name, final Config config) {
binding.setConfig(new Config.Observable(config, name));
}
private void onConfigSaved(final Tunnel savedTunnel,
final Throwable throwable) {
final String message;
if (throwable == null) {
message = getString(R.string.config_save_success, savedTunnel.getName());
Log.d(TAG, message);
Toast.makeText(getContext(), message, Toast.LENGTH_SHORT).show();
onFinished();
} else {
final String error = ExceptionLoggers.unwrapMessage(throwable);
message = getString(R.string.config_save_error, savedTunnel.getName(), error);
Log.e(TAG, message, throwable);
if (binding != null) {
Snackbar.make(binding.mainContainer, message, Snackbar.LENGTH_LONG).show();
}
}
}
@Override
public void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
@Override
public void onCreateOptionsMenu(final Menu menu, final MenuInflater inflater) {
inflater.inflate(R.menu.config_editor, menu);
}
@Override
public View onCreateView(@NonNull final LayoutInflater inflater, final ViewGroup container,
final Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
binding = TunnelEditorFragmentBinding.inflate(inflater, container, false);
binding.executePendingBindings();
return binding.getRoot();
}
@Override
public void onDestroyView() {
binding = null;
super.onDestroyView();
}
private void onFinished() {
// Hide the keyboard; it rarely goes away on its own.
final Activity activity = getActivity();
if (activity == null) return;
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(() -> {
// The selected tunnel has to actually change, but we have to remember this one.
final Tunnel savedTunnel = tunnel;
if (savedTunnel == getSelectedTunnel())
setSelectedTunnel(null);
setSelectedTunnel(savedTunnel);
});
}
@Override
public boolean onOptionsItemSelected(final MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_action_save:
final Config newConfig = new Config();
try {
binding.getConfig().commitData(newConfig);
} catch (final Exception e) {
final String error = ExceptionLoggers.unwrapMessage(e);
final String tunnelName = tunnel == null ? binding.getConfig().getName() : tunnel.getName();
final String message = getString(R.string.config_save_error, tunnelName, error);
Log.e(TAG, message, e);
Snackbar.make(binding.mainContainer, error, Snackbar.LENGTH_LONG).show();
return false;
}
if (tunnel == null) {
Log.d(TAG, "Attempting to create new tunnel " + binding.getConfig().getName());
final TunnelManager manager = Application.getComponent().getTunnelManager();
manager.create(binding.getConfig().getName(), newConfig)
.whenComplete(this::onTunnelCreated);
} else if (!tunnel.getName().equals(binding.getConfig().getName())) {
Log.d(TAG, "Attempting to rename tunnel to " + binding.getConfig().getName());
tunnel.setName(binding.getConfig().getName())
.whenComplete((a, b) -> onTunnelRenamed(tunnel, newConfig, b));
} else {
Log.d(TAG, "Attempting to save config of " + tunnel.getName());
tunnel.setConfig(newConfig)
.whenComplete((a, b) -> onConfigSaved(tunnel, b));
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public void onSaveInstanceState(@NonNull final Bundle outState) {
outState.putParcelable(KEY_LOCAL_CONFIG, binding.getConfig());
outState.putString(KEY_ORIGINAL_NAME, tunnel == null ? null : tunnel.getName());
super.onSaveInstanceState(outState);
}
@Override
public void onSelectedTunnelChanged(final Tunnel oldTunnel, final Tunnel newTunnel) {
tunnel = newTunnel;
if (binding == null)
return;
binding.setConfig(new Config.Observable(null, null));
if (tunnel != null)
tunnel.getConfigAsync().thenAccept(a -> onConfigLoaded(tunnel.getName(), a));
}
private void onTunnelCreated(final Tunnel newTunnel, final Throwable throwable) {
final String message;
if (throwable == null) {
tunnel = newTunnel;
message = getString(R.string.tunnel_create_success, tunnel.getName());
Log.d(TAG, message);
Toast.makeText(getContext(), message, Toast.LENGTH_SHORT).show();
onFinished();
} else {
final String error = ExceptionLoggers.unwrapMessage(throwable);
message = getString(R.string.tunnel_create_error, error);
Log.e(TAG, message, throwable);
if (binding != null) {
Snackbar.make(binding.mainContainer, message, Snackbar.LENGTH_LONG).show();
}
}
}
private void onTunnelRenamed(final Tunnel renamedTunnel, final Config newConfig,
final Throwable throwable) {
final String message;
if (throwable == null) {
message = getString(R.string.tunnel_rename_success, renamedTunnel.getName());
Log.d(TAG, message);
// Now save the rest of configuration changes.
Log.d(TAG, "Attempting to save config of renamed tunnel " + tunnel.getName());
renamedTunnel.setConfig(newConfig).whenComplete((a, b) -> onConfigSaved(renamedTunnel, b));
} else {
final String error = ExceptionLoggers.unwrapMessage(throwable);
message = getString(R.string.tunnel_rename_error, error);
Log.e(TAG, message, throwable);
if (binding != null) {
Snackbar.make(binding.mainContainer, message, Snackbar.LENGTH_LONG).show();
}
}
}
@Override
public void onViewStateRestored(final Bundle savedInstanceState) {
if (savedInstanceState == null) {
onSelectedTunnelChanged(null, getSelectedTunnel());
} else {
tunnel = getSelectedTunnel();
final Config.Observable config = savedInstanceState.getParcelable(KEY_LOCAL_CONFIG);
final String originalName = savedInstanceState.getString(KEY_ORIGINAL_NAME);
if (tunnel != null && !tunnel.getName().equals(originalName))
onSelectedTunnelChanged(null, tunnel);
else
binding.setConfig(config);
}
super.onViewStateRestored(savedInstanceState);
}
}
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