Implement Advertising ID service and integrate ATT flow in AdsProvider

android/build.gradle

@@ -23,3 +23,7 @@ android {
         jvmTarget = "1.8"
     }
 }
+
+dependencies {
+    implementation "com.google.android.gms:play-services-ads-identifier:18.0.1"
+}

android/src/main/AndroidManifest.xml

@@ -3,6 +3,7 @@
         package="so.kontext.sdk.flutter">
 
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="com.google.android.gms.permission.AD_ID" />
 
     <application />
 </manifest>

android/src/main/kotlin/so/kontext/sdk/flutter/AdvertisingIdPlugin.kt

@@ -0,0 +1,47 @@
+package so.kontext.sdk.flutter
+
+import android.content.Context
+import android.os.Handler
+import android.os.Looper
+import com.google.android.gms.ads.identifier.AdvertisingIdClient
+import io.flutter.embedding.engine.plugins.FlutterPlugin
+import io.flutter.plugin.common.MethodCall
+import io.flutter.plugin.common.MethodChannel
+import java.util.concurrent.Executors
+
+class AdvertisingIdPlugin : FlutterPlugin, MethodChannel.MethodCallHandler {
+    private lateinit var channel: MethodChannel
+    private lateinit var context: Context
+    private val mainHandler = Handler(Looper.getMainLooper())
+    private val executor = Executors.newSingleThreadExecutor()
+
+    override fun onAttachedToEngine(binding: FlutterPlugin.FlutterPluginBinding) {
+        context = binding.applicationContext
+        channel = MethodChannel(binding.binaryMessenger, "kontext_flutter_sdk/advertising_id")
+        channel.setMethodCallHandler(this)
+    }
+
+    override fun onMethodCall(call: MethodCall, result: MethodChannel.Result) {
+        when (call.method) {
+            "getAdvertisingId" -> executor.execute {
+                val id = try {
+                    val info = AdvertisingIdClient.getAdvertisingIdInfo(context)
+                    if (info.isLimitAdTrackingEnabled) null else info.id
+                } catch (_: Exception) {
+                    null
+                }
+
+                mainHandler.post {
+                    result.success(id)
+                }
+            }
+
+            else -> result.notImplemented()
+        }
+    }
+
+    override fun onDetachedFromEngine(binding: FlutterPlugin.FlutterPluginBinding) {
+        channel.setMethodCallHandler(null)
+        executor.shutdown()
+    }
+}

android/src/main/kotlin/so/kontext/sdk/flutter/KontextSdkPlugin.kt

@@ -3,31 +3,34 @@ package so.kontext.sdk.flutter
 import io.flutter.embedding.engine.plugins.FlutterPlugin
 
 class KontextSdkPlugin : FlutterPlugin {
+    private val advertisingId = AdvertisingIdPlugin()
     private val appInfo = AppInfoPlugin()
+    private val audio = DeviceAudioPlugin()
     private val hardware = DeviceHardwarePlugin()
+    private val network = DeviceNetworkPlugin()
     private val os = OperationSystemPlugin()
     private val power = DevicePowerPlugin()
-    private val audio = DeviceAudioPlugin()
-    private val network = DeviceNetworkPlugin()
     private val tcf = TransparencyConsentFramework()
 
     override fun onAttachedToEngine(binding: FlutterPlugin.FlutterPluginBinding) {
+        advertisingId.onAttachedToEngine(binding)
         appInfo.onAttachedToEngine(binding)
+        audio.onAttachedToEngine(binding)
         hardware.onAttachedToEngine(binding)
+        network.onAttachedToEngine(binding)
         os.onAttachedToEngine(binding)
         power.onAttachedToEngine(binding)
-        audio.onAttachedToEngine(binding)
-        network.onAttachedToEngine(binding)
         tcf.onAttachedToEngine(binding)
     }
 
     override fun onDetachedFromEngine(binding: FlutterPlugin.FlutterPluginBinding) {
+        advertisingId.onDetachedFromEngine(binding)
         appInfo.onDetachedFromEngine(binding)
+        audio.onDetachedFromEngine(binding)
         hardware.onDetachedFromEngine(binding)
+        network.onDetachedFromEngine(binding)
         os.onDetachedFromEngine(binding)
         power.onDetachedFromEngine(binding)
-        audio.onDetachedFromEngine(binding)
-        network.onDetachedFromEngine(binding)
         tcf.onDetachedFromEngine(binding)
     }
 }

example/ios/Runner/Info.plist

@@ -22,6 +22,8 @@
 	<string>????</string>
 	<key>CFBundleVersion</key>
 	<string>$(FLUTTER_BUILD_NUMBER)</string>
+	<key>NSUserTrackingUsageDescription</key>
+	<string>This identifier will be used to deliver more relevant ads.</string>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
 	<key>UILaunchStoryboardName</key>

ios/Classes/AdvertisingIdPlugin.swift

@@ -0,0 +1,37 @@
+import Flutter
+import UIKit
+import AdSupport
+import AppTrackingTransparency
+
+public class AdvertisingIdPlugin: NSObject, FlutterPlugin {
+    public static func register(with registrar: FlutterPluginRegistrar) {
+        let channel = FlutterMethodChannel(
+            name: "kontext_flutter_sdk/advertising_id",
+            binaryMessenger: registrar.messenger()
+        )
+        let instance = AdvertisingIdPlugin()
+        registrar.addMethodCallDelegate(instance, channel: channel)
+    }
+
+    public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+        switch call.method {
+        case "getAdvertisingId":
+            result(Self.getAdvertisingId())
+        default:
+            result(FlutterMethodNotImplemented)
+        }
+    }
+
+    private static func getAdvertisingId() -> String? {
+        let manager = ASIdentifierManager.shared()
+        if #available(iOS 14.0, *) {
+            return ATTrackingManager.trackingAuthorizationStatus == .authorized
+                ? manager.advertisingIdentifier.uuidString
+                : nil
+        }
+
+        return manager.isAdvertisingTrackingEnabled
+            ? manager.advertisingIdentifier.uuidString
+            : nil
+    }
+}

ios/Classes/KontextSdkPlugin.swift

@@ -2,12 +2,14 @@ import Flutter
 
 public class KontextSdkPlugin: NSObject, FlutterPlugin {
     public static func register(with registrar: FlutterPluginRegistrar) {
+        AdvertisingIdPlugin.register(with: registrar)
         AppInfoPlugin.register(with: registrar)
-        DeviceHardwarePlugin.register(with: registrar)
-        OperationSystemPlugin.register(with: registrar)
-        DevicePowerPlugin.register(with: registrar)
         DeviceAudioPlugin.register(with: registrar)
+        DeviceHardwarePlugin.register(with: registrar)
         DeviceNetworkPlugin.register(with: registrar)
+        DevicePowerPlugin.register(with: registrar)
+        OperationSystemPlugin.register(with: registrar)
+        TrackingAuthorizationPlugin.register(with: registrar)
         TransparencyConsentFrameworkPlugin.register(with: registrar)
     }
 }

ios/Classes/TrackingAuthorizationPlugin.swift

@@ -0,0 +1,73 @@
+import Flutter
+import UIKit
+import AppTrackingTransparency
+
+public class TrackingAuthorizationPlugin: NSObject, FlutterPlugin {
+    private var observer: NSObjectProtocol?
+    private static let notSupportedStatus = 4
+
+    deinit {
+        removeObserver()
+    }
+
+    public static func register(with registrar: FlutterPluginRegistrar) {
+        let channel = FlutterMethodChannel(
+            name: "kontext_flutter_sdk/tracking_authorization",
+            binaryMessenger: registrar.messenger()
+        )
+        let instance = TrackingAuthorizationPlugin()
+        registrar.addMethodCallDelegate(instance, channel: channel)
+    }
+
+    public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+        switch call.method {
+        case "getTrackingAuthorizationStatus":
+            getTrackingAuthorizationStatus(result: result)
+        case "requestTrackingAuthorization":
+            requestTrackingAuthorization(result: result)
+        default:
+            result(FlutterMethodNotImplemented)
+        }
+    }
+
+    private func getTrackingAuthorizationStatus(result: @escaping FlutterResult) {
+        if #available(iOS 14, *) {
+            result(Int(ATTrackingManager.trackingAuthorizationStatus.rawValue))
+        } else {
+            result(Self.notSupportedStatus)
+        }
+    }
+
+    private func requestTrackingAuthorization(result: @escaping FlutterResult) {
+        if #available(iOS 14, *) {
+            removeObserver()
+            ATTrackingManager.requestTrackingAuthorization { [weak self] status in
+                if status == .denied && ATTrackingManager.trackingAuthorizationStatus == .notDetermined {
+                    self?.addObserver(result: result)
+                    return
+                }
+                result(Int(status.rawValue))
+            }
+        } else {
+            result(Self.notSupportedStatus)
+        }
+    }
+
+    private func addObserver(result: @escaping FlutterResult) {
+        removeObserver()
+        observer = NotificationCenter.default.addObserver(
+            forName: UIApplication.didBecomeActiveNotification,
+            object: nil,
+            queue: .main
+        ) { [weak self] _ in
+            self?.requestTrackingAuthorization(result: result)
+        }
+    }
+
+    private func removeObserver() {
+        if let observer = observer {
+            NotificationCenter.default.removeObserver(observer)
+            self.observer = nil
+        }
+    }
+}

ios/PrivacyInfo.xcprivacy

@@ -3,12 +3,27 @@
 <plist version="1.0">
 <dict>
 
-  <key>NSPrivacyTracking</key><false/>
+  <key>NSPrivacyTracking</key><true/>
+
   <key>NSPrivacyTrackingDomains</key>
-  <array/>
+  <array>
+    <string>megabrain.co</string>
+  </array>
 
   <key>NSPrivacyCollectedDataTypes</key>
   <array>
+
+    <dict>
+      <key>NSPrivacyCollectedDataType</key>
+      <string>NSPrivacyCollectedDataTypeDeviceID</string>
+      <key>NSPrivacyCollectedDataTypeLinked</key><true/>
+      <key>NSPrivacyCollectedDataTypeTracking</key><true/>
+      <key>NSPrivacyCollectedDataTypePurposes</key>
+      <array>
+        <string>NSPrivacyCollectedDataTypePurposeThirdPartyAdvertising</string>
+      </array>
+    </dict>
+
     <dict>
       <key>NSPrivacyCollectedDataType</key>
       <string>NSPrivacyCollectedDataTypeOtherAppInfo</string>
@@ -30,6 +45,7 @@
         <string>NSPrivacyCollectedDataTypePurposeAnalytics</string>
       </array>
     </dict>
+
   </array>
 
   <key>NSPrivacyAccessedAPITypes</key>
@@ -42,7 +58,6 @@
         <string>C617.1</string>
       </array>
     </dict>
-
     <dict>
       <key>NSPrivacyAccessedAPIType</key>
       <string>NSPrivacyAccessedAPICategorySystemBootTime</string>

ios/kontext_flutter_sdk.podspec

@@ -16,7 +16,7 @@ Kontext Flutter SDK: sound status, app info, hardware, power, network, etc.
   s.platform            = :ios, '12.0'
   s.swift_version       = '5.0'
 
-  s.frameworks = 'AVFoundation', 'SystemConfiguration', 'CoreTelephony', 'WebKit'
+  s.frameworks = 'AVFoundation', 'SystemConfiguration', 'CoreTelephony', 'WebKit', 'AdSupport', 'AppTrackingTransparency'
 
   s.resources = ['PrivacyInfo.xcprivacy']