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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.util.Log
import android.view.View
import android.widget.Toast
import androidx.activity.result.contract.ActivityResultContracts
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 pendingTunnel: ObservableTunnel? = null
private var pendingTunnelUp: Boolean? = null
private val permissionActivityResultLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
val tunnel = pendingTunnel
val checked = pendingTunnelUp
if (tunnel != null && checked != null)
setTunnelStateWithPermissionsResult(tunnel, checked)
pendingTunnel = null
pendingTunnelUp = null
}
protected var selectedTunnel: ObservableTunnel?
get() = (activity as? BaseActivity)?.selectedTunnel
protected set(tunnel) {
(activity as? BaseActivity)?.selectedTunnel = tunnel
}
override fun onAttach(context: Context) {
super.onAttach(context)
(activity as? BaseActivity)?.addOnSelectedTunnelChangedListener(this)
}
override fun onDetach() {
(activity as? BaseActivity)?.removeOnSelectedTunnelChangedListener(this)
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
val activity = activity ?: return
activity.lifecycleScope.launch {
if (Application.getBackend() is GoBackend) {
val intent = GoBackend.VpnService.prepare(activity)
if (intent != null) {
pendingTunnel = tunnel
pendingTunnelUp = checked
permissionActivityResultLauncher.launch(intent)
return@launch
}
}
setTunnelStateWithPermissionsResult(tunnel, checked)
}
}
private fun setTunnelStateWithPermissionsResult(tunnel: ObservableTunnel, checked: Boolean) {
val activity = activity ?: return
activity.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 = activity.getString(messageResId, error)
val view = view
if (view != null)
Snackbar.make(view, message, Snackbar.LENGTH_LONG)
.setAnchorView(view.findViewById(R.id.create_fab))
.show()
else
Toast.makeText(activity, message, Toast.LENGTH_LONG).show()
Log.e(TAG, message, e)
}
}
}
companion object {
private const val TAG = "WireGuard/BaseFragment"
}
}
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