/**
* Copyright (c) 2018 LEAP Encryption Access Project and contributers
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
package se.leap.bitmaskclient.drawer;
import android.app.Activity;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
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.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.CompoundButton;
import android.widget.ListView;
import android.widget.Toast;
import se.leap.bitmaskclient.ConfigHelper;
import se.leap.bitmaskclient.DrawerSettingsAdapter;
import se.leap.bitmaskclient.DrawerSettingsAdapter.DrawerSettingsItem;
import se.leap.bitmaskclient.FragmentManagerEnhanced;
import se.leap.bitmaskclient.fragments.AlwaysOnDialog;
import se.leap.bitmaskclient.EipFragment;
import se.leap.bitmaskclient.Provider;
import se.leap.bitmaskclient.ProviderListActivity;
import se.leap.bitmaskclient.R;
import se.leap.bitmaskclient.fragments.AboutFragment;
import se.leap.bitmaskclient.fragments.LogFragment;
import static android.content.Context.MODE_PRIVATE;
import static se.leap.bitmaskclient.BitmaskApp.getRefWatcher;
import static se.leap.bitmaskclient.ConfigHelper.getSaveBattery;
import static se.leap.bitmaskclient.ConfigHelper.getShowAlwaysOnDialog;
import static se.leap.bitmaskclient.Constants.PROVIDER_KEY;
import static se.leap.bitmaskclient.Constants.REQUEST_CODE_SWITCH_PROVIDER;
import static se.leap.bitmaskclient.Constants.SHARED_PREFERENCES;
import static se.leap.bitmaskclient.DrawerSettingsAdapter.ABOUT;
import static se.leap.bitmaskclient.DrawerSettingsAdapter.ALWAYS_ON;
import static se.leap.bitmaskclient.DrawerSettingsAdapter.BATTERY_SAVER;
import static se.leap.bitmaskclient.DrawerSettingsAdapter.DrawerSettingsItem.getSimpleTextInstance;
import static se.leap.bitmaskclient.DrawerSettingsAdapter.DrawerSettingsItem.getSwitchInstance;
import static se.leap.bitmaskclient.DrawerSettingsAdapter.LOG;
import static se.leap.bitmaskclient.DrawerSettingsAdapter.SWITCH_PROVIDER;
import static se.leap.bitmaskclient.R.string.about_fragment_title;
import static se.leap.bitmaskclient.R.string.log_fragment_title;
import static se.leap.bitmaskclient.R.string.switch_provider_menu_option;
/**
* Fragment used for managing interactions for and presentation of a navigation drawer.
* See the
* design guidelines for a complete explanation of the behaviors implemented here.
*/
public class NavigationDrawerFragment extends Fragment {
/**
* Per the design guidelines, you should show the drawer on launch until the user manually
* expands it. This shared preference tracks this.
*/
private static final String PREF_USER_LEARNED_DRAWER = "navigation_drawer_learned";
/**
* Helper component that ties the action bar to the navigation drawer.
*/
private ActionBarDrawerToggle mDrawerToggle;
private DrawerLayout mDrawerLayout;
private View mDrawerView;
private ListView mDrawerSettingsListView;
private ListView mDrawerAccountsListView;
private View mFragmentContainerView;
private ArrayAdapter accountListAdapter;
private DrawerSettingsAdapter settingsListAdapter;
private boolean mFromSavedInstanceState;
private boolean mUserLearnedDrawer;
private String mTitle;
private SharedPreferences preferences;
private final static String KEY_SHOW_ENABLE_EXPERIMENTAL_FEATURE = "KEY_SHOW_ENABLE_EXPERIMENTAL_FEATURE";
private boolean showEnableExperimentalFeature = false;
AlertDialog alertDialog;
public NavigationDrawerFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Read in the flag indicating whether or not the user has demonstrated awareness of the
// drawer. See PREF_USER_LEARNED_DRAWER for details.
preferences = getContext().getSharedPreferences(SHARED_PREFERENCES, MODE_PRIVATE);
mUserLearnedDrawer = preferences.getBoolean(PREF_USER_LEARNED_DRAWER, false);
if (savedInstanceState != null) {
mFromSavedInstanceState = true;
}
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// Indicate that this fragment would like to influence the set of actions in the action bar.
setHasOptionsMenu(true);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
mDrawerView = inflater.inflate(R.layout.f_drawer_main, container, false);
restoreFromSavedInstance(savedInstanceState);
return mDrawerView;
}
public boolean isDrawerOpen() {
return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(mFragmentContainerView);
}
/**
* Users of this fragment must call this method to set up the navigation drawer interactions.
*
* @param fragmentId The android:id of this fragment in its activity's layout.
* @param drawerLayout The DrawerLayout containing this fragment's UI.
*/
public void setUp(int fragmentId, DrawerLayout drawerLayout) {
AppCompatActivity activity = (AppCompatActivity) getActivity();
ActionBar actionBar = activity.getSupportActionBar();
mDrawerSettingsListView = mDrawerView.findViewById(R.id.settingsList);
mDrawerSettingsListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView> parent, View view, int position, long id) {
selectItem(parent, position);
}
});
settingsListAdapter = new DrawerSettingsAdapter(getLayoutInflater());
if (getContext() != null) {
settingsListAdapter.addItem(getSwitchInstance(getString(R.string.save_battery),
getSaveBattery(getContext()),
BATTERY_SAVER,
new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean newStateIsChecked) {
onSwitchItemSelected(BATTERY_SAVER, newStateIsChecked);
}
}));
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
settingsListAdapter.addItem(getSimpleTextInstance(getString(R.string.always_on_vpn), ALWAYS_ON));
}
settingsListAdapter.addItem(getSimpleTextInstance(getString(switch_provider_menu_option), SWITCH_PROVIDER));
settingsListAdapter.addItem(getSimpleTextInstance(getString(log_fragment_title), LOG));
settingsListAdapter.addItem(getSimpleTextInstance(getString(about_fragment_title), ABOUT));
mDrawerSettingsListView.setAdapter(settingsListAdapter);
mDrawerAccountsListView = mDrawerView.findViewById(R.id.accountList);
mDrawerAccountsListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView> parent, View view, int position, long id) {
selectItem(parent, position);
}
});
accountListAdapter = new ArrayAdapter<>(actionBar.getThemedContext(),
R.layout.v_single_list_item,
android.R.id.text1);
createListAdapterData();
mDrawerAccountsListView.setAdapter(accountListAdapter);
mFragmentContainerView = activity.findViewById(fragmentId);
mDrawerLayout = drawerLayout;
// set a custom shadow that overlays the main content when the drawer opens
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setHomeButtonEnabled(true);
// ActionBarDrawerToggle ties together the the proper interactions
// between the navigation drawer and the action bar app icon.
mDrawerToggle = new ActionBarDrawerToggle(
getActivity(),
mDrawerLayout,
(Toolbar) drawerLayout.findViewById(R.id.toolbar),
R.string.navigation_drawer_open,
R.string.navigation_drawer_close
) {
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
if (!isAdded()) {
return;
}
getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
if (!isAdded()) {
return;
}
if (!mUserLearnedDrawer) {
// The user manually opened the drawer; store this flag to prevent auto-showing
// the navigation drawer automatically in the future.
mUserLearnedDrawer = true;
preferences.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true).apply();
}
getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
}
};
// If the user hasn't 'learned' about the drawer, open it to introduce them to the drawer,
// per the navigation drawer design guidelines.
if (!mUserLearnedDrawer && !mFromSavedInstanceState) {
mDrawerLayout.openDrawer(mFragmentContainerView);
}
// Defer code dependent on restoration of previous instance state.
mDrawerLayout.post(new Runnable() {
@Override
public void run() {
mDrawerToggle.syncState();
}
});
mDrawerLayout.addDrawerListener(mDrawerToggle);
}
private void selectItem(AdapterView> list, int position) {
if (list != null) {
((ListView) list).setItemChecked(position, true);
}
if (mDrawerLayout != null) {
mDrawerLayout.closeDrawer(mFragmentContainerView);
}
onTextItemSelected(list, position);
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
if (showEnableExperimentalFeature) {
outState.putBoolean(KEY_SHOW_ENABLE_EXPERIMENTAL_FEATURE, true);
}
}
private void restoreFromSavedInstance(Bundle savedInstanceState) {
if (savedInstanceState != null && savedInstanceState.containsKey(KEY_SHOW_ENABLE_EXPERIMENTAL_FEATURE)) {
showExperimentalFeatureAlert();
}
}
private void showExperimentalFeatureAlert() {
Activity activity = getActivity();
if (activity == null) {
return;
}
try {
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(getActivity());
showEnableExperimentalFeature = true;
alertDialog = alertBuilder
.setTitle(activity.getString(R.string.save_battery))
.setMessage(activity.getString(R.string.save_battery_message))
.setPositiveButton((android.R.string.yes), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
DrawerSettingsItem item = settingsListAdapter.getDrawerItem(BATTERY_SAVER);
item.setChecked(true);
settingsListAdapter.notifyDataSetChanged();
ConfigHelper.saveBattery(getContext(), item.isChecked());
}
})
.setNegativeButton(activity.getString(android.R.string.no), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
disableSwitch(BATTERY_SAVER);
}
}).setOnDismissListener(new DialogInterface.OnDismissListener() {
@Override
public void onDismiss(DialogInterface dialog) {
showEnableExperimentalFeature = false;
}
}).setOnCancelListener(new DialogInterface.OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
disableSwitch(BATTERY_SAVER);
}
}).show();
} catch (IllegalStateException e) {
e.printStackTrace();
}
}
public void showAlwaysOnDialog() {
try {
FragmentTransaction fragmentTransaction = new FragmentManagerEnhanced(
getActivity().getSupportFragmentManager()).removePreviousFragment(
AlwaysOnDialog.TAG);
DialogFragment newFragment = new AlwaysOnDialog();
newFragment.show(fragmentTransaction, AlwaysOnDialog.TAG);
} catch (IllegalStateException | NullPointerException e) {
e.printStackTrace();
}
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Forward the new configuration the drawer toggle component.
mDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
if (mDrawerLayout != null && isDrawerOpen()) {
showGlobalContextActionBar();
}
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onDestroy() {
super.onDestroy();
getRefWatcher(getActivity()).watch(this);
}
/**
* Per the navigation drawer design guidelines, updates the action bar to show the global app
* 'context', rather than just what's in the current screen.
*/
private void showGlobalContextActionBar() {
ActionBar actionBar = getActionBar();
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setTitle(R.string.app_name);
}
private ActionBar getActionBar() {
return ((AppCompatActivity) getActivity()).getSupportActionBar();
}
private void onSwitchItemSelected(int elementType, boolean newStateIsChecked) {
switch (elementType) {
case BATTERY_SAVER:
if (ConfigHelper.getSaveBattery(getContext()) == newStateIsChecked) {
//initial ui setup, ignore
return;
}
if (newStateIsChecked) {
showExperimentalFeatureAlert();
} else {
ConfigHelper.saveBattery(this.getContext(), false);
disableSwitch(BATTERY_SAVER);
}
break;
default:
break;
}
}
private void disableSwitch(int elementType) {
DrawerSettingsItem item = settingsListAdapter.getDrawerItem(elementType);
item.setChecked(false);
settingsListAdapter.notifyDataSetChanged();
}
public void onTextItemSelected(AdapterView> parent, int position) {
// update the main content by replacing fragments
FragmentManager fragmentManager = getFragmentManager();
Fragment fragment = null;
String fragmentTag = null;
if (parent == mDrawerAccountsListView) {
mTitle = getString(R.string.vpn_fragment_title);
fragment = new EipFragment();
fragmentTag = EipFragment.TAG;
Bundle arguments = new Bundle();
Provider currentProvider = ConfigHelper.getSavedProviderFromSharedPreferences(preferences);
arguments.putParcelable(PROVIDER_KEY, currentProvider);
fragment.setArguments(arguments);
} else {
Log.d("Drawer", String.format("Selected position %d", position));
DrawerSettingsItem settingsItem = settingsListAdapter.getItem(position);
switch (settingsItem.getItemType()) {
case SWITCH_PROVIDER:
getActivity().startActivityForResult(new Intent(getActivity(), ProviderListActivity.class), REQUEST_CODE_SWITCH_PROVIDER);
break;
case LOG:
mTitle = getString(log_fragment_title);
fragment = new LogFragment();
break;
case ABOUT:
mTitle = getString(about_fragment_title);
fragment = new AboutFragment();
break;
case ALWAYS_ON:
if (getShowAlwaysOnDialog(getContext())) {
showAlwaysOnDialog();
} else {
Intent intent = new Intent("android.net.vpn.SETTINGS");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
break;
default:
break;
}
}
if (fragment != null) {
fragmentManager.beginTransaction()
.replace(R.id.container, fragment, fragmentTag)
.commit();
}
restoreActionBar();
}
public void restoreActionBar() {
ActionBar actionBar = getActionBar();
if (actionBar != null) {
actionBar.setDisplayShowTitleEnabled(true);
actionBar.setSubtitle(mTitle);
}
}
public void refresh() {
createListAdapterData();
accountListAdapter.notifyDataSetChanged();
mDrawerAccountsListView.setAdapter(accountListAdapter);
}
private void createListAdapterData() {
accountListAdapter.clear();
String providerName = ConfigHelper.getProviderName(preferences);
if (providerName == null) {
//TODO: ADD A header to the ListView containing a useful message.
//TODO 2: disable switchProvider
} else {
accountListAdapter.add(providerName);
}
}
}