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NetworkUtils.kt
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NetworkUtils.kt
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/*
* Unitto is a unit converter for Android
* Copyright (c) 2023 Elshan Agaev
*
* 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 <https://www.gnu.org/licenses/>.
*/
package com.sadellie.unitto.feature.converter
import android.content.Context
import android.net.ConnectivityManager
import android.net.Network
import android.net.NetworkCapabilities
import android.net.NetworkRequest
import androidx.compose.runtime.Composable
import androidx.compose.runtime.State
import androidx.compose.ui.platform.LocalContext
import androidx.lifecycle.compose.collectAsStateWithLifecycle
import kotlinx.coroutines.channels.awaitClose
import kotlinx.coroutines.flow.callbackFlow
// https://github.com/PatilShreyas/NotyKT/pull/210/files#diff-88d0c098edd51dfdd06d871b22de23efe0935234fe80b2b54592583262fbe846
internal sealed class ConnectionState {
data object Available : ConnectionState()
data object Unavailable : ConnectionState()
}
private fun Context.observeConnectivityAsFlow() = callbackFlow {
val connectivityManager = getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
val callback = object : ConnectivityManager.NetworkCallback() {
override fun onAvailable(network: Network) { trySend(ConnectionState.Available) }
override fun onLost(network: Network) { trySend(ConnectionState.Unavailable) }
}
val networkRequest = NetworkRequest.Builder()
.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
.build()
connectivityManager.registerNetworkCallback(networkRequest, callback)
awaitClose {
connectivityManager.unregisterNetworkCallback(callback)
}
}
@Composable
internal fun connectivityState(): State<ConnectionState> {
val context = LocalContext.current
return context
.observeConnectivityAsFlow()
.collectAsStateWithLifecycle(ConnectionState.Unavailable)
}