[interactive_media_ads] Adds support for mid-roll ads (flutter#7407)

Adds `ContentProgressProvider` and adds `AdsRequest.contentProgressProvider` field.

This changes the platform interface `AdsRequest` to `PlatformAdsRequest`, so the `PlatformContentProgressProvider` can be passed to it. And the app-facing `AdsRequest` can take a `ContentProgressProver`.

Fixes flutter#154261

packages/interactive_media_ads/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.2.2
+
+* Adds support for mid-roll ads. See `AdsRequest.contentProgressProvider`.
+
 ## 0.2.1
 
 * Adds internal wrapper for Android native `ContentProgressProvider`.

packages/interactive_media_ads/README.md

@@ -81,10 +81,10 @@ class AdExampleWidget extends StatefulWidget {
 
 class _AdExampleWidgetState extends State<AdExampleWidget>
     with WidgetsBindingObserver {
-  // IMA sample tag for a single skippable inline video ad. See more IMA sample
+  // IMA sample tag for a pre-, mid-, and post-roll, single inline video ad. See more IMA sample
   // tags at https://developers.google.com/interactive-media-ads/docs/sdks/html5/client-side/tags
   static const String _adTagUrl =
-      'https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/single_preroll_skippable&sz=640x480&ciu_szs=300x250%2C728x90&gdfp_req=1&output=vast&unviewed_position_start=1&env=vp&impl=s&correlator=';
+      'https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/vmap_ad_samples&sz=640x480&cust_params=sample_ar%3Dpremidpost&ciu_szs=300x250&gdfp_req=1&ad_rule=1&output=vmap&unviewed_position_start=1&env=vp&impl=s&cmsid=496&vid=short_onecue&correlator=';
 
   // The AdsLoader instance exposes the request ads method.
   late final AdsLoader _adsLoader;
@@ -99,6 +99,15 @@ class _AdExampleWidgetState extends State<AdExampleWidget>
 
   // Controls the content video player.
   late final VideoPlayerController _contentVideoController;
+
+  // Periodically updates the SDK of the current playback progress of the
+  // content video.
+  Timer? _contentProgressTimer;
+
+  // Provides the SDK with the current playback progress of the content video.
+  // This is required to support mid-roll ads.
+  final ContentProgressProvider _contentProgressProvider =
+      ContentProgressProvider();
   // ···
   @override
   Widget build(BuildContext context) {
@@ -240,20 +249,43 @@ Future<void> _requestAds(AdDisplayContainer container) {
     },
   );
 
-  return _adsLoader.requestAds(AdsRequest(adTagUrl: _adTagUrl));
+  return _adsLoader.requestAds(AdsRequest(
+    adTagUrl: _adTagUrl,
+    contentProgressProvider: _contentProgressProvider,
+  ));
 }
 
-Future<void> _resumeContent() {
+Future<void> _resumeContent() async {
   setState(() {
     _shouldShowContentVideo = true;
   });
-  return _contentVideoController.play();
+
+  if (_adsManager != null) {
+    _contentProgressTimer = Timer.periodic(
+      const Duration(milliseconds: 200),
+      (Timer timer) async {
+        if (_contentVideoController.value.isInitialized) {
+          final Duration? progress = await _contentVideoController.position;
+          if (progress != null) {
+            await _contentProgressProvider.setProgress(
+              progress: progress,
+              duration: _contentVideoController.value.duration,
+            );
+          }
+        }
+      },
+    );
+  }
+
+  await _contentVideoController.play();
 }
 
 Future<void> _pauseContent() {
   setState(() {
     _shouldShowContentVideo = false;
   });
+  _contentProgressTimer?.cancel();
+  _contentProgressTimer = null;
   return _contentVideoController.pause();
 }
 ```
@@ -267,6 +299,7 @@ Dispose the content player and destroy the [AdsManager][6].
 @override
 void dispose() {
   super.dispose();
+  _contentProgressTimer?.cancel();
   _contentVideoController.dispose();
   _adsManager?.destroy();
   // ···

packages/interactive_media_ads/android/src/main/kotlin/dev/flutter/packages/interactive_media_ads/AdsRequestProxyApi.kt

@@ -21,7 +21,7 @@ class AdsRequestProxyApi(override val pigeonRegistrar: ProxyApiRegistrar) :
      *
      * This must match the version in pubspec.yaml.
      */
-    const val pluginVersion = "0.2.1"
+    const val pluginVersion = "0.2.2"
   }
 
   override fun setAdTagUrl(pigeon_instance: AdsRequest, adTagUrl: String) {

packages/interactive_media_ads/example/lib/main.dart

@@ -34,10 +34,10 @@ class AdExampleWidget extends StatefulWidget {
 
 class _AdExampleWidgetState extends State<AdExampleWidget>
     with WidgetsBindingObserver {
-  // IMA sample tag for a single skippable inline video ad. See more IMA sample
+  // IMA sample tag for a pre-, mid-, and post-roll, single inline video ad. See more IMA sample
   // tags at https://developers.google.com/interactive-media-ads/docs/sdks/html5/client-side/tags
   static const String _adTagUrl =
-      'https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/single_preroll_skippable&sz=640x480&ciu_szs=300x250%2C728x90&gdfp_req=1&output=vast&unviewed_position_start=1&env=vp&impl=s&correlator=';
+      'https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/vmap_ad_samples&sz=640x480&cust_params=sample_ar%3Dpremidpost&ciu_szs=300x250&gdfp_req=1&ad_rule=1&output=vmap&unviewed_position_start=1&env=vp&impl=s&cmsid=496&vid=short_onecue&correlator=';
 
   // The AdsLoader instance exposes the request ads method.
   late final AdsLoader _adsLoader;
@@ -56,6 +56,15 @@ class _AdExampleWidgetState extends State<AdExampleWidget>
 
   // Controls the content video player.
   late final VideoPlayerController _contentVideoController;
+
+  // Periodically updates the SDK of the current playback progress of the
+  // content video.
+  Timer? _contentProgressTimer;
+
+  // Provides the SDK with the current playback progress of the content video.
+  // This is required to support mid-roll ads.
+  final ContentProgressProvider _contentProgressProvider =
+      ContentProgressProvider();
   // #enddocregion example_widget
 
   // #docregion ad_and_content_players
@@ -156,20 +165,43 @@ class _AdExampleWidgetState extends State<AdExampleWidget>
       },
     );
 
-    return _adsLoader.requestAds(AdsRequest(adTagUrl: _adTagUrl));
+    return _adsLoader.requestAds(AdsRequest(
+      adTagUrl: _adTagUrl,
+      contentProgressProvider: _contentProgressProvider,
+    ));
   }
 
-  Future<void> _resumeContent() {
+  Future<void> _resumeContent() async {
     setState(() {
       _shouldShowContentVideo = true;
     });
-    return _contentVideoController.play();
+
+    if (_adsManager != null) {
+      _contentProgressTimer = Timer.periodic(
+        const Duration(milliseconds: 200),
+        (Timer timer) async {
+          if (_contentVideoController.value.isInitialized) {
+            final Duration? progress = await _contentVideoController.position;
+            if (progress != null) {
+              await _contentProgressProvider.setProgress(
+                progress: progress,
+                duration: _contentVideoController.value.duration,
+              );
+            }
+          }
+        },
+      );
+    }
+
+    await _contentVideoController.play();
   }
 
   Future<void> _pauseContent() {
     setState(() {
       _shouldShowContentVideo = false;
     });
+    _contentProgressTimer?.cancel();
+    _contentProgressTimer = null;
     return _contentVideoController.pause();
   }
   // #enddocregion request_ads
@@ -178,6 +210,7 @@ class _AdExampleWidgetState extends State<AdExampleWidget>
   @override
   void dispose() {
     super.dispose();
+    _contentProgressTimer?.cancel();
     _contentVideoController.dispose();
     _adsManager?.destroy();
     // #enddocregion dispose

packages/interactive_media_ads/ios/interactive_media_ads/Sources/interactive_media_ads/AdsRequestProxyAPIDelegate.swift

@@ -13,7 +13,7 @@ class AdsRequestProxyAPIDelegate: PigeonApiDelegateIMAAdsRequest {
   /// The current version of the `interactive_media_ads` plugin.
   ///
   /// This must match the version in pubspec.yaml.
-  static let pluginVersion = "0.2.1"
+  static let pluginVersion = "0.2.2"
 
   func pigeonDefaultConstructor(
     pigeonApi: PigeonApiIMAAdsRequest, adTagUrl: String, adDisplayContainer: IMAAdDisplayContainer,

packages/interactive_media_ads/lib/interactive_media_ads.dart

@@ -5,8 +5,10 @@
 export 'src/ad_display_container.dart';
 export 'src/ads_loader.dart';
 export 'src/ads_manager_delegate.dart';
+export 'src/ads_request.dart';
 export 'src/android/android_interactive_media_ads.dart'
     show AndroidInteractiveMediaAds;
+export 'src/content_progress_provider.dart';
 export 'src/ios/ios_interactive_media_ads.dart' show IOSInteractiveMediaAds;
 export 'src/platform_interface/platform_interface.dart'
     show
@@ -16,5 +18,4 @@ export 'src/platform_interface/platform_interface.dart'
         AdErrorType,
         AdEvent,
         AdEventType,
-        AdsLoadErrorData,
-        AdsRequest;
+        AdsLoadErrorData;

packages/interactive_media_ads/lib/src/ads_loader.dart

@@ -6,6 +6,7 @@ import 'package:flutter/foundation.dart';
 
 import 'ad_display_container.dart';
 import 'ads_manager_delegate.dart';
+import 'ads_request.dart';
 import 'platform_interface/platform_interface.dart';
 
 /// Allows publishers to request ads from ad servers or a dynamic ad insertion
@@ -97,7 +98,7 @@ class AdsLoader {
   /// Ads cannot be requested until the `AdDisplayContainer` has been added to
   /// the native View hierarchy. See [AdDisplayContainer.onContainerAdded].
   Future<void> requestAds(AdsRequest request) {
-    return platform.requestAds(request);
+    return platform.requestAds(request.platform);
   }
 }
 

packages/interactive_media_ads/lib/src/ads_request.dart

@@ -0,0 +1,37 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'content_progress_provider.dart';
+import 'platform_interface/platform_interface.dart';
+
+/// An object containing the data used to request ads from the server.
+class AdsRequest {
+  /// Creates an [AdsRequest].
+  AdsRequest({
+    required String adTagUrl,
+    ContentProgressProvider? contentProgressProvider,
+  }) : this.fromPlatform(
+          PlatformAdsRequest(
+            adTagUrl: adTagUrl,
+            contentProgressProvider: contentProgressProvider?.platform,
+          ),
+        );
+
+  /// Constructs an [AdsRequest] from a specific platform implementation.
+  AdsRequest.fromPlatform(this.platform);
+
+  /// Implementation of [PlatformAdsRequest] for the current platform.
+  final PlatformAdsRequest platform;
+
+  /// The URL from which ads will be requested.
+  String get adTagUrl => platform.adTagUrl;
+
+  /// A [ContentProgressProvider] instance to allow scheduling of ad breaks
+  /// based on content progress (cue points).
+  ContentProgressProvider? get contentProgressProvider => platform
+              .contentProgressProvider !=
+          null
+      ? ContentProgressProvider.fromPlatform(platform.contentProgressProvider!)
+      : null;
+}

packages/interactive_media_ads/lib/src/android/android_ads_loader.dart

@@ -9,6 +9,7 @@ import 'package:flutter/widgets.dart';
 import '../platform_interface/platform_interface.dart';
 import 'android_ad_display_container.dart';
 import 'android_ads_manager.dart';
+import 'android_content_progress_provider.dart';
 import 'enum_converter_utils.dart';
 import 'interactive_media_ads.g.dart' as ima;
 import 'interactive_media_ads_proxy.dart';
@@ -79,13 +80,18 @@ base class AndroidAdsLoader extends PlatformAdsLoader {
   }
 
   @override
-  Future<void> requestAds(AdsRequest request) async {
+  Future<void> requestAds(PlatformAdsRequest request) async {
     final ima.AdsLoader adsLoader = await _adsLoaderFuture;
 
     final ima.AdsRequest androidRequest = await _sdkFactory.createAdsRequest();
 
     await Future.wait(<Future<void>>[
       androidRequest.setAdTagUrl(request.adTagUrl),
+      if (request.contentProgressProvider != null)
+        androidRequest.setContentProgressProvider(
+          (request.contentProgressProvider! as AndroidContentProgressProvider)
+              .progressProvider,
+        ),
       adsLoader.requestAds(androidRequest),
     ]);
   }

packages/interactive_media_ads/lib/src/android/android_content_progress_provider.dart

@@ -0,0 +1,70 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:async';
+
+import 'package:meta/meta.dart';
+
+import '../platform_interface/platform_content_progress_provider.dart';
+import 'interactive_media_ads.g.dart' as ima;
+import 'interactive_media_ads_proxy.dart';
+
+/// Android implementation of [PlatformContentProgressProviderCreationParams].
+final class AndroidContentProgressProviderCreationParams
+    extends PlatformContentProgressProviderCreationParams {
+  /// Constructs a [AndroidContentProgressProviderCreationParams].
+  const AndroidContentProgressProviderCreationParams({
+    @visibleForTesting InteractiveMediaAdsProxy? proxy,
+  })  : _proxy = proxy ?? const InteractiveMediaAdsProxy(),
+        super();
+
+  /// Creates a [AndroidContentProgressProviderCreationParams] from an instance of
+  /// [PlatformContentProgressProviderCreationParams].
+  factory AndroidContentProgressProviderCreationParams.fromPlatformContentProgressProviderCreationParams(
+    // Placeholder to prevent requiring a breaking change if params are added to
+    // PlatformContentProgressProviderCreationParams.
+    // ignore: avoid_unused_constructor_parameters
+    PlatformContentProgressProviderCreationParams params, {
+    @visibleForTesting InteractiveMediaAdsProxy? proxy,
+  }) {
+    return AndroidContentProgressProviderCreationParams(proxy: proxy);
+  }
+
+  final InteractiveMediaAdsProxy _proxy;
+}
+
+/// Android implementation of [PlatformContentProgressProvider].
+base class AndroidContentProgressProvider
+    extends PlatformContentProgressProvider {
+  /// Constructs an [AndroidContentProgressProvider].
+  AndroidContentProgressProvider(super.params) : super.implementation();
+
+  /// The native Android ContentProgressProvider.
+  ///
+  /// This allows the SDK to track progress of the content video.
+  @internal
+  late final ima.ContentProgressProvider progressProvider =
+      _androidParams._proxy.newContentProgressProvider();
+
+  late final AndroidContentProgressProviderCreationParams _androidParams =
+      params is AndroidContentProgressProviderCreationParams
+          ? params as AndroidContentProgressProviderCreationParams
+          : AndroidContentProgressProviderCreationParams
+              .fromPlatformContentProgressProviderCreationParams(
+              params,
+            );
+
+  @override
+  Future<void> setProgress({
+    required Duration progress,
+    required Duration duration,
+  }) async {
+    return progressProvider.setContentProgress(
+      _androidParams._proxy.newVideoProgressUpdate(
+        currentTimeMs: progress.inMilliseconds,
+        durationMs: duration.inMilliseconds,
+      ),
+    );
+  }
+}

packages/interactive_media_ads/lib/src/android/android_interactive_media_ads.dart

@@ -6,9 +6,11 @@ import '../platform_interface/interactive_media_ads_platform.dart';
 import '../platform_interface/platform_ad_display_container.dart';
 import '../platform_interface/platform_ads_loader.dart';
 import '../platform_interface/platform_ads_manager_delegate.dart';
+import '../platform_interface/platform_content_progress_provider.dart';
 import 'android_ad_display_container.dart';
 import 'android_ads_loader.dart';
 import 'android_ads_manager_delegate.dart';
+import 'android_content_progress_provider.dart';
 
 /// Android implementation of [InteractiveMediaAdsPlatform].
 final class AndroidInteractiveMediaAds extends InteractiveMediaAdsPlatform {
@@ -37,4 +39,11 @@ final class AndroidInteractiveMediaAds extends InteractiveMediaAdsPlatform {
   ) {
     return AndroidAdsManagerDelegate(params);
   }
+
+  @override
+  PlatformContentProgressProvider createPlatformContentProgressProvider(
+    PlatformContentProgressProviderCreationParams params,
+  ) {
+    return AndroidContentProgressProvider(params);
+  }
 }