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/*
* Copyright © 2017-2019 WireGuard LLC. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
package com.wireguard.android.fragment
import android.content.Context
import android.content.Intent
import android.util.Log
import android.view.View
import android.widget.Toast
import androidx.databinding.DataBindingUtil
import androidx.databinding.ViewDataBinding
import androidx.fragment.app.Fragment
import androidx.lifecycle.lifecycleScope
import com.google.android.material.snackbar.Snackbar
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.backend.Tunnel
import com.wireguard.android.databinding.TunnelDetailFragmentBinding
import com.wireguard.android.databinding.TunnelListItemBinding
import com.wireguard.android.model.ObservableTunnel
import com.wireguard.android.util.ErrorMessages
import kotlinx.coroutines.launch
/**
* Base class for fragments that need to know the currently-selected tunnel. Only does anything when
* attached to a `BaseActivity`.
*/
abstract class BaseFragment : Fragment(), OnSelectedTunnelChangedListener {
private var baseActivity: BaseActivity? = null
private var pendingTunnel: ObservableTunnel? = null
private var pendingTunnelUp: Boolean? = null
protected var selectedTunnel: ObservableTunnel?
get() = baseActivity?.selectedTunnel
protected set(tunnel) {
baseActivity?.selectedTunnel = tunnel
}
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
if (requestCode == REQUEST_CODE_VPN_PERMISSION) {
if (pendingTunnel != null && pendingTunnelUp != null) setTunnelStateWithPermissionsResult(pendingTunnel!!, pendingTunnelUp!!)
pendingTunnel = null
pendingTunnelUp = null
}
}
override fun onAttach(context: Context) {
super.onAttach(context)
if (context is BaseActivity) {
baseActivity = context
baseActivity?.addOnSelectedTunnelChangedListener(this)
} else {
baseActivity = null
}
}
override fun onDetach() {
baseActivity?.removeOnSelectedTunnelChangedListener(this)
baseActivity = null
super.onDetach()
}
fun setTunnelState(view: View, checked: Boolean) {
val tunnel = when (val binding = DataBindingUtil.findBinding<ViewDataBinding>(view)) {
is TunnelDetailFragmentBinding -> binding.tunnel
is TunnelListItemBinding -> binding.item
else -> return
} ?: return
lifecycleScope.launch {
if (Application.getBackend() is GoBackend) {
val intent = GoBackend.VpnService.prepare(view.context)
if (intent != null) {
pendingTunnel = tunnel
pendingTunnelUp = checked
startActivityForResult(intent, REQUEST_CODE_VPN_PERMISSION)
return@launch
}
}
setTunnelStateWithPermissionsResult(tunnel, checked)
}
}
private fun setTunnelStateWithPermissionsResult(tunnel: ObservableTunnel, checked: Boolean) {
lifecycleScope.launch {
try {
tunnel.setStateAsync(Tunnel.State.of(checked))
} catch (e: Throwable) {
val error = ErrorMessages[e]
val messageResId = if (checked) R.string.error_up else R.string.error_down
val message = requireContext().getString(messageResId, error)
val view = view
if (view != null)
Snackbar.make(view, message, Snackbar.LENGTH_LONG)
.setAnchorView(view.findViewById<View>(R.id.create_fab))
.show()
else
Toast.makeText(requireContext(), message, Toast.LENGTH_LONG).show()
Log.e(TAG, message, e)
}
}
}
companion object {
private const val REQUEST_CODE_VPN_PERMISSION = 23491
private const val TAG = "WireGuard/BaseFragment"
}
}
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