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path: root/wallet/src/main/java/net/taler/wallet/Utils.kt
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/*
 * This file is part of GNU Taler
 * (C) 2020 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.app.Activity
import android.content.Context
import android.net.ConnectivityManager
import android.net.ConnectivityManager.NetworkCallback
import android.net.NetworkCapabilities
import android.net.NetworkRequest
import android.net.wifi.WifiConfiguration
import android.net.wifi.WifiManager
import android.net.wifi.WifiNetworkSpecifier
import android.os.Build.VERSION.SDK_INT
import android.widget.Toast
import android.widget.Toast.LENGTH_LONG
import androidx.annotation.RequiresApi
import com.google.zxing.integration.android.IntentIntegrator

fun scanQrCode(activity: Activity) {
    IntentIntegrator(activity).apply {
        setPrompt("")
        setBeepEnabled(true)
        setOrientationLocked(false)
    }.initiateScan(listOf(IntentIntegrator.QR_CODE))
}

fun connectToWifi(context: Context, ssid: String) {
    if (SDK_INT >= 29) {
        connectToWifi29(context, ssid)
    } else {
        connectToWifiDeprecated(context, ssid)
    }
}

@RequiresApi(29)
private fun connectToWifi29(context: Context, ssid: String) {
    val wifiManager = context.getSystemService(WifiManager::class.java)
    if (wifiManager?.isWifiEnabled == false) {
        // we are not allowed to enable the WiFi anymore, so show at least a hint about it
        Toast.makeText(context, R.string.wifi_disabled_error, LENGTH_LONG).show()
    }

    val specifier = WifiNetworkSpecifier.Builder()
        .setSsid(ssid)
        .build()
    val request = NetworkRequest.Builder()
        .addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
        .setNetworkSpecifier(specifier)
        .build()
    val connectivityManager = context.getSystemService(ConnectivityManager::class.java)
    connectivityManager?.requestNetwork(request, NetworkCallback())
}

@Suppress("DEPRECATION")
private fun connectToWifiDeprecated(context: Context, ssid: String) {
    context.getSystemService(WifiManager::class.java)?.apply {
        if (!isWifiEnabled) {
            val enabledResult = setWifiEnabled(true)
            while (enabledResult && !isWifiEnabled) Thread.sleep(25)
        }
        val wifiConfig = WifiConfiguration().apply {
            SSID = "\"$ssid\""
            allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE)
        }
        addNetwork(wifiConfig).let { netId ->
            if (netId == -1) {
                val str = context.getString(R.string.wifi_connect_error, ssid)
                Toast.makeText(context, str, LENGTH_LONG).show()
            } else {
                disconnect()
                enableNetwork(netId, true)
                reconnect()
            }
        }
    }
}

fun cleanExchange(exchange: String) = exchange.let {
    if (it.startsWith("https://")) it.substring(8) else it
}.trimEnd('/')