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package com.wireguard.android.fragment;
import android.app.Activity;
import android.content.Context;
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.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 boolean isViewStateRestored;
private Config localConfig = new Config();
private Tunnel localTunnel;
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 onConfigLoaded(final Config config) {
localConfig = copyParcelable(config);
if (binding != null && isViewStateRestored)
binding.setConfig(new Config.Observable(localConfig, originalName));
}
private void onConfigSaved(@SuppressWarnings("unused") final Config config,
final Throwable throwable) {
final String message;
if (throwable == null) {
message = getString(R.string.config_save_success, localTunnel.getName());
Log.d(TAG, message);
onFinished();
} else {
final String error = ExceptionLoggers.unwrap(throwable).getMessage();
message = getString(R.string.config_save_error, localTunnel.getName(), error);
Log.e(TAG, message, throwable);
if (binding != null) {
final CoordinatorLayout container = binding.mainContainer;
Snackbar.make(container, message, Snackbar.LENGTH_LONG).show();
}
}
}
@Override
public void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState != null) {
localConfig = savedInstanceState.getParcelable(KEY_LOCAL_CONFIG);
originalName = savedInstanceState.getString(KEY_ORIGINAL_NAME);
}
// 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;
originalName = getSelectedTunnel().getName();
getSelectedTunnel().getConfigAsync().thenAccept(this::onConfigLoaded);
} else if (getSelectedTunnel() == null && originalName != null) {
localConfig = new Config();
originalName = null;
}
localTunnel = getSelectedTunnel();
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 = 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();
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 = localTunnel;
if (savedTunnel == getSelectedTunnel())
setSelectedTunnel(null);
setSelectedTunnel(savedTunnel);
});
}
@Override
public boolean onOptionsItemSelected(final MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_action_save:
final Tunnel selectedTunnel = getSelectedTunnel();
if (localConfig != null) {
try {
binding.getConfig().commitData(localConfig);
} catch (Exception e) {
final String error = ExceptionLoggers.unwrap(e).getMessage();
final String message = getString(R.string.config_save_error, localTunnel.getName(), error);
Log.e(TAG, message, e);
final CoordinatorLayout container = binding.mainContainer;
Snackbar.make(container, error, Snackbar.LENGTH_LONG).show();
return false;
}
}
if (selectedTunnel == null) {
Log.d(TAG, "Attempting to create new tunnel " + binding.getConfig().getName());
final TunnelManager manager = Application.getComponent().getTunnelManager();
manager.create(binding.getConfig().getName(), localConfig)
.whenComplete(this::onTunnelCreated);
} else if (!selectedTunnel.getName().equals(binding.getConfig().getName())) {
Log.d(TAG, "Attempting to rename tunnel to " + binding.getConfig().getName());
selectedTunnel.setName(binding.getConfig().getName())
.whenComplete(this::onTunnelRenamed);
} else if (localConfig != null) {
Log.d(TAG, "Attempting to save config of " + selectedTunnel.getName());
selectedTunnel.setConfig(localConfig)
.whenComplete(this::onConfigSaved);
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public void onSaveInstanceState(final Bundle outState) {
outState.putParcelable(KEY_LOCAL_CONFIG, localConfig);
outState.putString(KEY_ORIGINAL_NAME, 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;
originalName = newTunnel.getName();
newTunnel.getConfigAsync().thenAccept(this::onConfigLoaded);
} else {
localConfig = new Config();
if (binding != null && isViewStateRestored)
binding.setConfig(new Config.Observable(localConfig, ""));
originalName = null;
}
localTunnel = newTunnel;
}
private void onTunnelCreated(final Tunnel tunnel, final Throwable throwable) {
final String message;
if (throwable == null) {
message = getString(R.string.tunnel_create_success, tunnel.getName());
Log.d(TAG, message);
localTunnel = tunnel;
onFinished();
} else {
final String error = ExceptionLoggers.unwrap(throwable).getMessage();
message = getString(R.string.tunnel_create_error, error);
Log.e(TAG, message, throwable);
if (binding != null) {
final CoordinatorLayout container = binding.mainContainer;
Snackbar.make(container, message, Snackbar.LENGTH_LONG).show();
}
}
}
private void onTunnelRenamed(final String name, final Throwable throwable) {
final String message;
if (throwable == null) {
message = getString(R.string.tunnel_rename_success, localTunnel.getName(), name);
Log.d(TAG, message);
// Now save the rest of configuration changes.
Log.d(TAG, "Attempting to save config of renamed tunnel " + localTunnel.getName());
localTunnel.setConfig(localConfig).whenComplete(this::onConfigSaved);
} else {
final String error = ExceptionLoggers.unwrap(throwable).getMessage();
message = getString(R.string.tunnel_rename_error, error);
Log.e(TAG, message, throwable);
if (binding != null) {
final CoordinatorLayout container = binding.mainContainer;
Snackbar.make(container, message, Snackbar.LENGTH_LONG).show();
}
}
}
@Override
public void onViewStateRestored(final Bundle savedInstanceState) {
super.onViewStateRestored(savedInstanceState);
if (localConfig == null)
localConfig = new Config();
binding.setConfig(new Config.Observable(localConfig, originalName));
isViewStateRestored = true;
}
}
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