Feat: Implement qr code generation and scanning

CMakeLists.txt

@@ -4,7 +4,7 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 set(PROJECT AmneziaVPN)
-set(AMNEZIAVPN_VERSION 4.8.15.4)
+set(AMNEZIAVPN_VERSION 4.9.0.2)
 
 set(QT_CREATOR_SKIP_PACKAGE_MANAGER_SETUP ON CACHE BOOL "" FORCE)
 set(CMAKE_PROJECT_TOP_LEVEL_INCLUDES

client/amneziaApplication.cpp

@@ -109,6 +109,9 @@ void AmneziaApplication::init()
             // install filter on main window
             if (auto win = qobject_cast<QQuickWindow*>(obj)) {
                 win->installEventFilter(this);
+#if defined(Q_OS_ANDROID) || defined(Q_OS_IOS)
+                win->setDefaultAlphaBuffer(true);
+#endif
 #ifdef Q_OS_ANDROID
                 QObject::connect(win, &QQuickWindow::sceneGraphError,
                     [](QQuickWindow::SceneGraphError, const QString &msg) {

client/android/res/drawable/ic_pairing_back.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFE8E8EC"
+        android:pathData="M20,11H7.83l5.59,-5.59L12,4l-8,8 8,8 1.41,-1.41L7.83,13H20v-2z" />
+</vector>

client/android/res/drawable/torch_fab_bg.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+    <solid android:color="#38FFFFFF" />
+</shape>

client/android/res/layout/camera_preview.xml

@@ -8,4 +8,75 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
 
+    <org.amnezia.vpn.PairingQrScanOverlayView
+        android:id="@+id/pairingScanOverlay"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:visibility="gone" />
+
+    <LinearLayout
+        android:id="@+id/pairingChrome"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_gravity="top"
+        android:background="@android:color/transparent"
+        android:orientation="horizontal"
+        android:paddingStart="8dp"
+        android:paddingTop="28dp"
+        android:paddingEnd="16dp"
+        android:paddingBottom="12dp"
+        android:visibility="gone">
+
+        <ImageButton
+            android:id="@+id/pairingBack"
+            android:layout_width="48dp"
+            android:layout_height="48dp"
+            android:layout_gravity="top"
+            android:background="?android:attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/pairing_qr_camera_back"
+            android:padding="12dp"
+            android:scaleType="fitCenter"
+            android:src="@drawable/ic_pairing_back" />
+
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="4dp"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <TextView
+                android:id="@+id/pairingTitle"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="@string/pairing_qr_camera_title"
+                android:textColor="#FFE8E8EC"
+                android:textSize="20sp"
+                android:textStyle="bold" />
+
+            <TextView
+                android:id="@+id/pairingSubtitle"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="8dp"
+                android:text="@string/pairing_qr_camera_subtitle"
+                android:textColor="#FFB8B8C0"
+                android:textSize="14sp" />
+        </LinearLayout>
+    </LinearLayout>
+
+    <TextView
+        android:id="@+id/torchButton"
+        android:layout_width="56dp"
+        android:layout_height="56dp"
+        android:layout_gravity="bottom|center_horizontal"
+        android:layout_marginBottom="32dp"
+        android:background="@drawable/torch_fab_bg"
+        android:clickable="true"
+        android:focusable="true"
+        android:gravity="center"
+        android:text="🔦"
+        android:textSize="26sp"
+        android:contentDescription="@string/camera_torch" />
+
 </FrameLayout>

client/android/res/values-ru/strings.xml

@@ -24,5 +24,13 @@
     <string name="notificationSettingsDialogMessage">Для показа уведомлений необходимо включить уведомления в системных настройках</string>
     <string name="openNotificationSettings">Открыть настройки уведомлений</string>
 
+    <string name="cameraPermissionDialogTitle">Доступ к камере</string>
+    <string name="cameraPermissionDialogMessage">Чтобы отсканировать QR-код для добавления устройства, Amnezia VPN нужен доступ к камере.</string>
+    <string name="cameraPermissionContinue">Продолжить</string>
+    <string name="camera_torch">Фонарик</string>
+    <string name="pairing_qr_camera_title">Добавить устройство по QR</string>
+    <string name="pairing_qr_camera_subtitle">Отсканируйте QR сессии на устройстве, которое хотите добавить. Перед отправкой подписки будет подтверждение.</string>
+    <string name="pairing_qr_camera_back">Назад</string>
+
     <string name="tvNoFileBrowser">Пожалуйста, установите приложение для просмотра файлов</string>
 </resources>

client/android/res/values/strings.xml

@@ -24,5 +24,13 @@
     <string name="notificationSettingsDialogMessage">To show notifications, you must enable notifications in the system settings</string>
     <string name="openNotificationSettings">Open notification settings</string>
 
+    <string name="cameraPermissionDialogTitle">Camera access</string>
+    <string name="cameraPermissionDialogMessage">To scan a QR code for device pairing, Amnezia VPN needs access to the camera.</string>
+    <string name="cameraPermissionContinue">Continue</string>
+    <string name="camera_torch">Flashlight</string>
+    <string name="pairing_qr_camera_title">Add device via QR</string>
+    <string name="pairing_qr_camera_subtitle">Scan the session QR shown on the device you want to add. You will confirm before the subscription is sent.</string>
+    <string name="pairing_qr_camera_back">Back</string>
+
     <string name="tvNoFileBrowser">Please install a file management utility to browse files</string>
 </resources>

client/android/src/org/amnezia/vpn/AmneziaActivity.kt

@@ -42,6 +42,9 @@ import androidx.core.view.OnApplyWindowInsetsListener
 import androidx.core.view.ViewCompat
 import androidx.core.view.WindowInsetsCompat
 import androidx.core.view.WindowInsetsControllerCompat
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.LifecycleRegistry
 import java.io.IOException
 import kotlin.LazyThreadSafetyMode.NONE
 import kotlin.coroutines.CoroutineContext
@@ -73,12 +76,18 @@ private const val CHECK_VPN_PERMISSION_ACTION_CODE = 1
 private const val CREATE_FILE_ACTION_CODE = 2
 private const val OPEN_FILE_ACTION_CODE = 3
 private const val CHECK_NOTIFICATION_PERMISSION_ACTION_CODE = 4
+private const val CHECK_CAMERA_PERMISSION_ACTION_CODE = 5
 
 private const val PREFS_NOTIFICATION_PERMISSION_ASKED = "NOTIFICATION_PERMISSION_ASKED"
 private const val OPEN_FILE_AFTER_RESUME_DELAY_MS = 400L
 private const val KEY_PENDING_OPEN_FILE_URI = "pending_open_file_uri"
 
-class AmneziaActivity : QtActivity() {
+class AmneziaActivity : QtActivity(), LifecycleOwner {
+
+    private val lifecycleRegistry = LifecycleRegistry(this)
+
+    override val lifecycle: Lifecycle
+        get() = lifecycleRegistry
 
     private lateinit var mainScope: CoroutineScope
     private val qtInitialized = CompletableDeferred<Unit>()
@@ -99,6 +108,8 @@ class AmneziaActivity : QtActivity() {
     private var pendingOpenFileUri: String? = null
     private var openFileDeliveryScheduled = false
 
+    private var lastPairingQrReaderStartUptimeMs: Long = 0L
+
     private val vpnServiceEventHandler: Handler by lazy(NONE) {
         object : Handler(Looper.getMainLooper()) {
             override fun handleMessage(msg: Message) {
@@ -205,6 +216,7 @@ class AmneziaActivity : QtActivity() {
         registerBroadcastReceivers()
         intent?.let(::processIntent)
         runBlocking { vpnProto = proto.await() }
+        lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_CREATE)
     }
 
     override fun onSaveInstanceState(outState: Bundle) {
@@ -262,6 +274,7 @@ class AmneziaActivity : QtActivity() {
 
     override fun onStart() {
         super.onStart()
+        lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_START)
         Log.d(TAG, "Start Amnezia activity")
         mainScope.launch {
             qtInitialized.await()
@@ -285,6 +298,7 @@ class AmneziaActivity : QtActivity() {
             qtInitialized.await()
             QtAndroidController.onServiceDisconnected()
         }
+        lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_STOP)
         super.onStop()
     }
 
@@ -357,6 +371,7 @@ class AmneziaActivity : QtActivity() {
         if (qtInitialized.isCompleted) {
             QtAndroidController.onActivityPaused()
         }
+        lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_PAUSE)
         super.onPause()
         isActivityResumed = false
         // Cancel all pending operations when activity pauses
@@ -367,6 +382,7 @@ class AmneziaActivity : QtActivity() {
 
     override fun onResume() {
         super.onResume()
+        lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_RESUME)
         isActivityResumed = true
         Log.d(TAG, "Resume Amnezia activity")
         if (qtInitialized.isCompleted) {
@@ -483,6 +499,7 @@ class AmneziaActivity : QtActivity() {
         unregisterBroadcastReceiver(notificationStateReceiver)
         notificationStateReceiver = null
         mainScope.cancel()
+        lifecycleRegistry.handleLifecycleEvent(Lifecycle.Event.ON_DESTROY)
         super.onDestroy()
     }
 
@@ -880,6 +897,66 @@ class AmneziaActivity : QtActivity() {
     @SuppressLint("UnsupportedChromeOsCameraSystemFeature")
     fun isCameraPresent(): Boolean = applicationContext.packageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA)
 
+    @Suppress("unused")
+    fun isCameraPermissionGranted(): Boolean =
+        ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED
+
+    @Suppress("unused")
+    fun requestCameraPermissionForQrPairing() {
+        if (isCameraPermissionGranted()) {
+            mainScope.launch {
+                qtInitialized.await()
+                QtAndroidController.onCameraPermissionResult(true)
+            }
+            return
+        }
+        runOnUiThread {
+            AlertDialog.Builder(this)
+                .setTitle(R.string.cameraPermissionDialogTitle)
+                .setMessage(R.string.cameraPermissionDialogMessage)
+                .setNegativeButton(R.string.cancel) { _, _ ->
+                    mainScope.launch {
+                        qtInitialized.await()
+                        QtAndroidController.onCameraPermissionResult(false)
+                    }
+                }
+                .setPositiveButton(R.string.cameraPermissionContinue) { _, _ ->
+                    requestPermission(
+                        Manifest.permission.CAMERA,
+                        CHECK_CAMERA_PERMISSION_ACTION_CODE,
+                        PermissionRequestHandler(
+                            onSuccess = {
+                                mainScope.launch {
+                                    qtInitialized.await()
+                                    QtAndroidController.onCameraPermissionResult(true)
+                                }
+                            },
+                            onFail = {
+                                mainScope.launch {
+                                    qtInitialized.await()
+                                    QtAndroidController.onCameraPermissionResult(false)
+                                }
+                            },
+                            onAny = {}
+                        )
+                    )
+                }
+                .show()
+        }
+    }
+
+    @Suppress("unused")
+    fun openApplicationDetailsSettings() {
+        try {
+            Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS).apply {
+                data = Uri.fromParts("package", packageName, null)
+                startActivity(this)
+            }
+        } catch (e: ActivityNotFoundException) {
+            Log.e(TAG, "openApplicationDetailsSettings: $e")
+        }
+    }
+
     @Suppress("unused")
     fun isOnTv(): Boolean = applicationContext.packageManager.hasSystemFeature(PackageManager.FEATURE_LEANBACK)
 
@@ -928,6 +1005,19 @@ class AmneziaActivity : QtActivity() {
         }
     }
 
+    @Suppress("unused")
+    fun startPairingQrCodeReader() {
+        val now = SystemClock.uptimeMillis()
+        if (now - lastPairingQrReaderStartUptimeMs < 1200L) {
+            return
+        }
+        lastPairingQrReaderStartUptimeMs = now
+        Intent(this, CameraActivity::class.java).also {
+            it.putExtra(CameraActivity.EXTRA_PAIRING_QR_CAMERA, true)
+            startActivity(it)
+        }
+    }
+
     @Suppress("unused")
     fun setSaveLogs(enabled: Boolean) {
         Log.v(TAG, "Set save logs: $enabled")
@@ -1179,6 +1269,7 @@ class AmneziaActivity : QtActivity() {
                 CREATE_FILE_ACTION_CODE -> "CREATE_FILE"
                 OPEN_FILE_ACTION_CODE -> "OPEN_FILE"
                 CHECK_NOTIFICATION_PERMISSION_ACTION_CODE -> "CHECK_NOTIFICATION_PERMISSION"
+                CHECK_CAMERA_PERMISSION_ACTION_CODE -> "CHECK_CAMERA_PERMISSION"
                 else -> actionCode.toString()
             }
     }