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January 16, 2023 06:22
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| import android.app.Application | |
| import android.content.Context | |
| import android.net.ConnectivityManager | |
| import android.net.Network | |
| import android.net.NetworkCapabilities | |
| import android.net.NetworkRequest | |
| import kotlinx.coroutines.* | |
| import kotlinx.coroutines.flow.MutableSharedFlow | |
| import kotlinx.coroutines.flow.asSharedFlow | |
| import java.io.IOException | |
| object NetStat{ | |
| data class Stat( | |
| var available: Boolean = false, | |
| var metered: Boolean = false, | |
| var internet: Boolean = false, | |
| var valid: Boolean = false, | |
| var lastOnlineCheck: Long = 0, | |
| var lastKnowOnline: Boolean = false | |
| ){ | |
| override fun equals(other: Any?): Boolean { | |
| if(other !is Stat){ | |
| return false | |
| } | |
| return available==other.available | |
| && metered==other.metered | |
| && internet==other.internet | |
| && valid==other.valid | |
| } | |
| override fun hashCode(): Int { | |
| var result = available.hashCode() | |
| result = 31 * result + metered.hashCode() | |
| result = 31 * result + internet.hashCode() | |
| result = 31 * result + valid.hashCode() | |
| result = 31 * result + lastOnlineCheck.hashCode() | |
| result = 31 * result + lastKnowOnline.hashCode() | |
| return result | |
| } | |
| } | |
| var stat = Stat() | |
| private set | |
| private lateinit var connectivityManager: ConnectivityManager | |
| fun initialize(context: Context){ | |
| connectivityManager = if(android.os.Build.VERSION.SDK_INT < 23){ | |
| context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager | |
| } else{ | |
| context.getSystemService(ConnectivityManager::class.java) | |
| } | |
| val networkRequest = NetworkRequest.Builder() | |
| .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) | |
| .addTransportType(NetworkCapabilities.TRANSPORT_WIFI) | |
| .addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR) | |
| .build() | |
| connectivityManager.requestNetwork(networkRequest, networkCallback) | |
| } | |
| fun release( | |
| appContext: Application | |
| ){ | |
| connectivityManager.unregisterNetworkCallback(networkCallback) | |
| } | |
| private val networkCallback = object : ConnectivityManager.NetworkCallback() { | |
| override fun onAvailable(network: Network) { | |
| super.onAvailable(network) | |
| stat.available = true | |
| callback(stat) | |
| } | |
| override fun onCapabilitiesChanged( | |
| network: Network, | |
| networkCapabilities: NetworkCapabilities | |
| ) { | |
| super.onCapabilitiesChanged(network, networkCapabilities) | |
| val unmetered = networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED) | |
| val internet = networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) | |
| val valid = networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED) | |
| stat.metered = !unmetered | |
| stat.internet = internet | |
| stat.valid = valid | |
| callback(stat) | |
| } | |
| override fun onLost(network: Network) { | |
| super.onLost(network) | |
| stat.available = false | |
| callback(stat) | |
| } | |
| } | |
| fun isOnline(): Boolean { | |
| var isOnline = false | |
| try { | |
| val runtime = Runtime.getRuntime() | |
| val p = runtime.exec("ping -c 1 8.8.8.8") | |
| val waitFor = p.waitFor() | |
| isOnline = | |
| waitFor == 0 | |
| stat.lastOnlineCheck = System.currentTimeMillis() | |
| } catch (e: IOException) { | |
| e.printStackTrace() | |
| } catch (e: InterruptedException) { | |
| e.printStackTrace() | |
| } | |
| stat.lastKnowOnline = isOnline | |
| callback(stat) | |
| return isOnline | |
| } | |
| private val callbacks = mutableListOf<(stat: Stat)->Unit>() | |
| private fun callback(stat: Stat){ | |
| CoroutineScope( | |
| Dispatchers.IO | |
| ).launch { | |
| publish(stat) | |
| } | |
| callbacks.forEach { | |
| it(stat) | |
| } | |
| } | |
| fun add(callback: (stat: Stat)->Unit){ | |
| callbacks.add(callback) | |
| } | |
| fun remove(callback: (stat: Stat)->Unit){ | |
| callbacks.remove(callback) | |
| } | |
| fun clear(){ | |
| callbacks.clear() | |
| } | |
| @OptIn(ExperimentalCoroutinesApi::class) | |
| suspend fun waitFor(targetStat: Stat): Stat = | |
| suspendCancellableCoroutine { | |
| if(stat == targetStat){ | |
| it.resume(stat){} | |
| } | |
| else{ | |
| var block: ((stat: Stat)->Unit)? = null | |
| block = {stat: Stat-> | |
| if(stat==targetStat){ | |
| callbacks.remove(block) | |
| it.resume(stat){} | |
| } | |
| } | |
| callbacks.add(block) | |
| } | |
| } | |
| @OptIn(ExperimentalCoroutinesApi::class) | |
| suspend fun waitFor(condition: (Stat)->Boolean): Stat = | |
| suspendCancellableCoroutine { | |
| if(condition(stat)){ | |
| it.resume(stat){} | |
| } | |
| else{ | |
| var block: ((stat: Stat)->Unit)? = null | |
| block = {stat: Stat-> | |
| if(condition(NetStat.stat)){ | |
| callbacks.remove(block) | |
| it.resume(stat){} | |
| } | |
| } | |
| callbacks.add(block) | |
| } | |
| } | |
| private val _events = MutableSharedFlow<Stat>() | |
| val events = _events.asSharedFlow() | |
| private suspend fun publish(stat: Stat) = _events.emit(stat) | |
| } |
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