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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: Apache-2.0
*/
package com.wireguard.android.fragment;
import android.content.Context;
import android.content.Intent;
import android.databinding.DataBindingUtil;
import android.databinding.ViewDataBinding;
import android.support.annotation.Nullable;
import android.support.design.widget.Snackbar;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
import com.wireguard.android.Application;
import com.wireguard.android.R;
import com.wireguard.android.activity.BaseActivity;
import com.wireguard.android.activity.BaseActivity.OnSelectedTunnelChangedListener;
import com.wireguard.android.backend.GoBackend;
import com.wireguard.android.databinding.TunnelDetailFragmentBinding;
import com.wireguard.android.databinding.TunnelListItemBinding;
import com.wireguard.android.model.Tunnel;
import com.wireguard.android.model.Tunnel.State;
import com.wireguard.android.util.ExceptionLoggers;
/**
* Base class for fragments that need to know the currently-selected tunnel. Only does anything when
* attached to a {@code BaseActivity}.
*/
public abstract class BaseFragment extends Fragment implements OnSelectedTunnelChangedListener {
private static final String TAG = "WireGuard/" + BaseFragment.class.getSimpleName();
private static final int REQUEST_CODE_VPN_PERMISSION = 23491;
@Nullable private BaseActivity activity;
@Nullable private Tunnel pendingTunnel;
@Nullable private Boolean pendingTunnelUp;
@Nullable
protected Tunnel getSelectedTunnel() {
return activity != null ? activity.getSelectedTunnel() : null;
}
@Override
public void onAttach(final Context context) {
super.onAttach(context);
if (context instanceof BaseActivity) {
activity = (BaseActivity) context;
activity.addOnSelectedTunnelChangedListener(this);
} else {
activity = null;
}
}
@Override
public void onDetach() {
if (activity != null)
activity.removeOnSelectedTunnelChangedListener(this);
activity = null;
super.onDetach();
}
@Override
public void onActivityResult(final int requestCode, final int resultCode, @Nullable final Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE_VPN_PERMISSION) {
if (pendingTunnel != null && pendingTunnelUp != null)
setTunnelStateWithPermissionsResult(pendingTunnel, pendingTunnelUp);
pendingTunnel = null;
pendingTunnelUp = null;
}
}
protected void setSelectedTunnel(@Nullable final Tunnel tunnel) {
if (activity != null)
activity.setSelectedTunnel(tunnel);
}
public void setTunnelState(final View view, final boolean checked) {
final ViewDataBinding binding = DataBindingUtil.findBinding(view);
final Tunnel tunnel;
if (binding instanceof TunnelDetailFragmentBinding)
tunnel = ((TunnelDetailFragmentBinding) binding).getTunnel();
else if (binding instanceof TunnelListItemBinding)
tunnel = ((TunnelListItemBinding) binding).getItem();
else
return;
if (tunnel == null)
return;
Application.getBackendAsync().thenAccept(backend -> {
if (backend instanceof GoBackend) {
final Intent intent = GoBackend.VpnService.prepare(view.getContext());
if (intent != null) {
pendingTunnel = tunnel;
pendingTunnelUp = checked;
startActivityForResult(intent, REQUEST_CODE_VPN_PERMISSION);
return;
}
}
setTunnelStateWithPermissionsResult(tunnel, checked);
});
}
private void setTunnelStateWithPermissionsResult(final Tunnel tunnel, final boolean checked) {
tunnel.setState(State.of(checked)).whenComplete((state, throwable) -> {
if (throwable == null)
return;
final String error = ExceptionLoggers.unwrapMessage(throwable);
final int messageResId = checked ? R.string.error_up : R.string.error_down;
final String message = getContext().getString(messageResId, error);
final View view = getView();
if (view != null)
Snackbar.make(view, message, Snackbar.LENGTH_LONG).show();
else
Toast.makeText(getContext(), message, Toast.LENGTH_LONG).show();
Log.e(TAG, message, throwable);
});
}
}
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