implement yubiclip fnc, add Android settings

android/app/build.gradle

@@ -30,7 +30,7 @@ apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
 
-    compileSdkVersion flutter.compileSdkVersion
+    compileSdkVersion 32
 
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
@@ -83,10 +83,11 @@ dependencies {
     implementation 'org.jetbrains.kotlinx:kotlinx-serialization-json:1.3.2'
 
     // Lifecycle
-    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.1'
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.5.1'
     implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
 
-    implementation 'androidx.fragment:fragment-ktx:1.4.1'
+    implementation 'androidx.fragment:fragment-ktx:1.5.1'
+    implementation 'androidx.preference:preference-ktx:1.2.0'
 
     // testing dependencies
     testImplementation "junit:junit:$project.junitVersion"

android/app/src/main/AndroidManifest.xml

@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.yubico.authenticator">
 
@@ -15,16 +16,18 @@
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_label">
+
         <activity
             android:name=".MainActivity"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:exported="true"
             android:hardwareAccelerated="true"
-            android:launchMode="singleTop"
+            android:launchMode="singleTask"
             android:resizeableActivity="false"
             android:screenOrientation="portrait"
             android:theme="@style/LaunchTheme"
             android:windowSoftInputMode="adjustResize">
+
             <!-- Specifies an Android theme to apply to this Activity as soon as
                  the Android process has started. This theme is visible to the user
                  while the Flutter UI initializes. After that, this theme continues
@@ -42,10 +45,25 @@
                 android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"
                 android:resource="@xml/device_filter" />
         </activity>
+
+        <activity
+            android:name=".YOTPActivity"
+            android:exported="true"
+            android:launchMode="singleTop"
+            android:theme="@style/YOTPActivityTheme">
+            <intent-filter>
+                <action android:name="android.nfc.action.NDEF_DISCOVERED" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:scheme="https" />
+            </intent-filter>
+
+        </activity>
+
         <!-- Don't delete the meta-data below.
              This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
     </application>
-</manifest>
+
+</manifest>

android/app/src/main/java/com/yubico/authenticator/YOTPActivity.kt

@@ -0,0 +1,105 @@
+package com.yubico.authenticator
+
+import android.app.Activity
+import android.content.*
+import android.net.Uri
+import android.os.Build
+import android.os.Bundle
+import android.widget.Toast
+
+import com.yubico.authenticator.logging.Log
+
+typealias ResourceId = Int
+
+class YOTPActivity : Activity() {
+
+    private var openAppOnNfcTap: Boolean = false
+    private var copyOtpOnNfcTap: Boolean = false
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        val prefs: SharedPreferences = getSharedPreferences(PREFS_FILE, Context.MODE_PRIVATE)
+        openAppOnNfcTap = prefs.getBoolean(PREF_NFC_OPEN_APP, false)
+        copyOtpOnNfcTap = prefs.getBoolean(PREF_NFC_COPY_OTP, false)
+
+        handleIntent(intent)
+    }
+
+    override fun onNewIntent(intent: Intent) {
+        super.onNewIntent(intent)
+        handleIntent(intent)
+    }
+
+    override fun onPause() {
+        super.onPause()
+        overridePendingTransition(0, 0)
+    }
+
+    private fun handleIntent(intent: Intent) {
+        val intentData: Uri? = intent.data
+        if (intentData != null) {
+
+            var otp: String? = null
+            if (copyOtpOnNfcTap) {
+                try {
+                    otp = parseOtpFromUri(intentData)
+                    setPrimaryClip(otp)
+
+                    if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.S_V2) {
+                        showToast(R.string.otp_success, Toast.LENGTH_SHORT)
+                    }
+                } catch (_: IllegalArgumentException) {
+                    showToast(R.string.otp_parse_failure, Toast.LENGTH_LONG)
+                } catch (_: UnsupportedOperationException) {
+                    showToast(R.string.otp_set_clip_failure, Toast.LENGTH_LONG)
+                }
+
+            }
+
+            if (openAppOnNfcTap) {
+                val mainAppIntent = Intent(this, MainActivity::class.java).apply {
+                    if (otp != null) {
+                        putExtra("OTP", otp)
+                    }
+                }
+                startActivity(mainAppIntent)
+            }
+
+            finishAndRemoveTask()
+        }
+    }
+
+    private fun showToast(value: ResourceId, length: Int) {
+        Toast.makeText(this, value, length).show()
+    }
+
+    private fun parseOtpFromUri(uri: Uri): String {
+        uri.fragment?.let {
+            if (it.length == 44) {
+                return it
+            }
+        }
+
+        Log.e(TAG, "Failed to parse OTP from provided otp uri string")
+        Log.t(TAG, "Uri was $uri")
+        throw IllegalArgumentException()
+    }
+
+    private fun setPrimaryClip(otp: String) {
+        try {
+            val clipboardManager = getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
+            clipboardManager.setPrimaryClip(ClipData.newPlainText(otp, otp))
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to copy otp string to clipboard", e.stackTraceToString())
+            throw UnsupportedOperationException()
+        }
+    }
+
+    companion object {
+        const val TAG = "YubicoAuthenticatorOTPActivity"
+        const val PREFS_FILE = "FlutterSharedPreferences"
+        const val PREF_NFC_OPEN_APP = "flutter.prefNfcOpenApp"
+        const val PREF_NFC_COPY_OTP = "flutter.prefNfcCopyOtp"
+    }
+
+}

android/app/src/main/res/values/strings.xml

@@ -1,4 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <string name="app_label">Yubico Authenticator</string>
+    <string name="otp_success">Successfully copied OTP code from YubiKey to clipboard.</string>
+    <string name="otp_parse_failure">Failed to parse OTP code from YubiKey.</string>
+    <string name="otp_set_clip_failure">Failed to access clipboard when trying to copy OTP code from YubiKey.</string>
 </resources>

android/app/src/main/res/values/styles.xml

@@ -15,4 +15,15 @@
     <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
         <item name="android:windowBackground">?android:colorBackground</item>
     </style>
+
+    <style name="YOTPActivityTheme" parent="NormalTheme">
+        <item name="android:windowBackground">@android:color/transparent</item>
+        <item name="android:windowAnimationStyle">@null</item>
+        <item name="android:windowDisablePreview">true</item>
+        <item name="android:windowIsTranslucent">true</item>
+        <item name="android:windowContentOverlay">@null</item>
+        <item name="android:windowNoTitle">true</item>
+        <item name="android:windowIsFloating">true</item>
+        <item name="android:backgroundDimEnabled">false</item>
+    </style>
 </resources>

android/build.gradle

@@ -1,5 +1,5 @@
 buildscript {
-    ext.kotlin_version = '1.6.21'
+    ext.kotlin_version = '1.7.0'
     repositories {
         google()
         mavenCentral()

lib/android/views/android_settings_page.dart

@@ -0,0 +1,95 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:logging/logging.dart';
+import 'package:yubico_authenticator/core/state.dart';
+
+import '../../app/logging.dart';
+import '../../app/state.dart';
+import '../../widgets/list_title.dart';
+import '../../widgets/responsive_dialog.dart';
+
+final _log = Logger('android_settings');
+
+class AndroidSettingsPage extends ConsumerStatefulWidget {
+  const AndroidSettingsPage({super.key});
+
+  @override
+  ConsumerState<ConsumerStatefulWidget> createState() =>
+      _AndroidSettingsPageState();
+}
+
+class _AndroidSettingsPageState extends ConsumerState<AndroidSettingsPage> {
+  static const String prefNfcOpenApp = 'prefNfcOpenApp';
+  static const String prefNfcCopyOtp = 'prefNfcCopyOtp';
+
+  bool nfcOpenApp = false;
+  bool nfcCopyOtp = false;
+
+  @override
+  void initState() {
+    super.initState();
+    nfcOpenApp = ref.read(prefProvider).getBool(prefNfcOpenApp) ?? false;
+    nfcCopyOtp = ref.read(prefProvider).getBool(prefNfcCopyOtp) ?? false;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final themeMode = ref.watch(themeModeProvider);
+    return ResponsiveDialog(
+      title: const Text('Settings'),
+      child: Column(
+        mainAxisSize: MainAxisSize.min,
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          const ListTitle('NFC tap options'),
+          SwitchListTile(
+              title: const Text('Open authenticator'),
+              value: nfcOpenApp,
+              onChanged: (value) {
+                ref.read(prefProvider).setBool(prefNfcOpenApp, value);
+                setState(() {
+                  nfcOpenApp = value;
+                });
+              }),
+          SwitchListTile(
+              title: const Text('Copy OTP to clipboard'),
+              value: nfcCopyOtp,
+              onChanged: (value) {
+                ref.read(prefProvider).setBool(prefNfcCopyOtp, value);
+                setState(() {
+                  nfcCopyOtp = value;
+                });
+              }),
+          const ListTitle('Appearance'),
+          RadioListTile<ThemeMode>(
+            title: const Text('System default'),
+            value: ThemeMode.system,
+            groupValue: themeMode,
+            onChanged: (mode) {
+              ref.read(themeModeProvider.notifier).setThemeMode(mode!);
+              _log.debug('Set theme mode to $mode');
+            },
+          ),
+          RadioListTile<ThemeMode>(
+            title: const Text('Light mode'),
+            value: ThemeMode.light,
+            groupValue: themeMode,
+            onChanged: (mode) {
+              ref.read(themeModeProvider.notifier).setThemeMode(mode!);
+              _log.debug('Set theme mode to $mode');
+            },
+          ),
+          RadioListTile<ThemeMode>(
+            title: const Text('Dark mode'),
+            value: ThemeMode.dark,
+            groupValue: themeMode,
+            onChanged: (mode) {
+              ref.read(themeModeProvider.notifier).setThemeMode(mode!);
+              _log.debug('Set theme mode to $mode');
+            },
+          ),
+        ],
+      ),
+    );
+  }
+}

lib/app/views/main_drawer.dart

@@ -1,9 +1,12 @@
+import 'dart:io';
+
 import 'package:flutter/material.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
-import '../../management/views/management_screen.dart';
 import '../../about_page.dart';
+import '../../android/views/android_settings_page.dart';
+import '../../management/views/management_screen.dart';
 import '../../settings_page.dart';
 import '../message.dart';
 import '../models.dart';
@@ -98,7 +101,9 @@ class MainPageDrawer extends ConsumerWidget {
               if (shouldPop) nav.pop();
               showBlurDialog(
                 context: context,
-                builder: (context) => const SettingsPage(),
+                builder: (context) => Platform.isAndroid
+                    ? const AndroidSettingsPage()
+                    : const SettingsPage(),
                 routeSettings: const RouteSettings(name: 'settings'),
               );
             },