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/*
* This file is part of GNU Taler
* (C) 2023 Taler Systems S.A.
*
* GNU Taler 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, or (at your option) any later version.
*
* GNU Taler 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
* GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
package net.taler.wallet
import android.content.Context
import android.content.Context.CONNECTIVITY_SERVICE
import android.net.ConnectivityManager
import android.net.Network
import android.net.NetworkCapabilities
import android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET
import android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED
import androidx.annotation.UiThread
import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
class NetworkManager(context: Context) : ConnectivityManager.NetworkCallback() {
private val connectivityManager: ConnectivityManager
private val _networkStatus: MutableLiveData<Boolean>
val networkStatus: LiveData<Boolean>
init {
// careful, the order below is important, should probably get simplified
connectivityManager = context.getSystemService(CONNECTIVITY_SERVICE) as ConnectivityManager
_networkStatus = MutableLiveData(getCurrentStatus())
networkStatus = _networkStatus
connectivityManager.registerDefaultNetworkCallback(this)
}
@UiThread
override fun onCapabilitiesChanged(network: Network, networkCapabilities: NetworkCapabilities) {
super.onCapabilitiesChanged(network, networkCapabilities)
_networkStatus.postValue(networkCapabilities.isOnline())
}
override fun onLost(network: Network) {
super.onLost(network)
_networkStatus.postValue(getCurrentStatus())
}
private fun getCurrentStatus(): Boolean {
return connectivityManager.activeNetwork?.let { network ->
connectivityManager.getNetworkCapabilities(network)?.isOnline()
} ?: false
}
private fun NetworkCapabilities.isOnline(): Boolean {
return hasCapability(NET_CAPABILITY_INTERNET) && hasCapability(NET_CAPABILITY_VALIDATED)
}
}
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