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YubiKeyFragment.kt
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YubiKeyFragment.kt
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/*
* Copyright (C) 2022 Yubico.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.yubico.yubikit.android.app.ui
import android.app.AlertDialog
import android.os.Bundle
import android.view.View
import android.widget.TextView
import android.widget.Toast
import androidx.fragment.app.Fragment
import androidx.fragment.app.activityViewModels
import androidx.lifecycle.lifecycleScope
import com.yubico.yubikit.android.app.MainViewModel
import com.yubico.yubikit.android.app.R
import com.yubico.yubikit.android.transport.nfc.NfcYubiKeyDevice
import com.yubico.yubikit.core.Logger
import com.yubico.yubikit.core.YubiKeyDevice
import com.yubico.yubikit.core.application.ApplicationNotAvailableException
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
import java.io.Closeable
abstract class YubiKeyFragment<App : Closeable, VM : YubiKeyViewModel<App>> : Fragment() {
private val activityViewModel: MainViewModel by activityViewModels()
protected abstract val viewModel: VM
private lateinit var yubiKeyPrompt: AlertDialog
private lateinit var emptyText: TextView
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
emptyText = view.findViewById(R.id.empty_view)
emptyText.visibility = View.VISIBLE
yubiKeyPrompt = AlertDialog.Builder(context)
.setTitle("Insert YubiKey")
.setMessage(R.string.need_yubikey)
.setOnCancelListener { viewModel.pendingAction.value = null }
.create()
activityViewModel.yubiKey.observe(viewLifecycleOwner) {
if (it != null) {
onYubiKey(it)
} else {
emptyText.setText(R.string.need_yubikey)
}
}
viewModel.result.observe(viewLifecycleOwner) { result ->
result.onSuccess {
it?.let {
Toast.makeText(context, it, Toast.LENGTH_SHORT).show()
}
}.onFailure {
Logger.e("Error:", it)
Toast.makeText(context, it.message ?: "No message", Toast.LENGTH_SHORT).show()
if (it is ApplicationNotAvailableException) {
emptyText.setText(R.string.app_missing)
}
}
viewModel.clearResult()
}
viewModel.pendingAction.observe(viewLifecycleOwner) {
if (it != null) {
activityViewModel.yubiKey.value.let { device ->
if (device != null) {
onYubiKey(device)
} else {
yubiKeyPrompt.setMessage(resources.getString(R.string.hold_key))
yubiKeyPrompt.show()
}
}
}
}
}
override fun onPause() {
if (yubiKeyPrompt.isShowing) {
yubiKeyPrompt.dismiss()
}
super.onPause()
}
private fun onYubiKey(it: YubiKeyDevice) {
lifecycleScope.launch {
withContext(activityViewModel.singleDispatcher) {
viewModel.onYubiKeyDevice(it)
if (it is NfcYubiKeyDevice) {
withContext(Dispatchers.Main) {
if (yubiKeyPrompt.isShowing) {
yubiKeyPrompt.setMessage(resources.getString(R.string.remove_key))
} else {
emptyText.setText(R.string.remove_key)
}
}
it.remove(yubiKeyPrompt::dismiss)
} else if (yubiKeyPrompt.isShowing) {
yubiKeyPrompt.dismiss()
}
Unit
}
}
}
}