Experimental: Show trending packages on landing page (dart-lang#8755)

Author: szakarias

app/lib/frontend/handlers/landing.dart

@@ -43,6 +43,7 @@ Future<shelf.Response> indexLandingHandler(shelf.Request request) async {
       mostPopularPackages: topPackages.mostPopular(),
       topFlutterPackages: topPackages.topFlutter(),
       topDartPackages: topPackages.topDart(),
+      trendingPackages: topPackages.trending(),
       topPoWVideos: youtubeBackend.getTopPackageOfWeekVideos(count: 4),
     );
   }

app/lib/frontend/templates/landing.dart

@@ -14,13 +14,15 @@ String renderLandingPage({
   List<PackageView>? mostPopularPackages,
   List<PackageView>? topFlutterPackages,
   List<PackageView>? topDartPackages,
+  List<PackageView>? trendingPackages,
   List<PkgOfWeekVideo>? topPoWVideos,
 }) {
   final content = landingPageNode(
     ffPackages: ffPackages,
     mostPopularPackages: mostPopularPackages,
     topFlutterPackages: topFlutterPackages,
     topDartPackages: topDartPackages,
+    trendingPackages: trendingPackages,
     topPoWVideos: topPoWVideos,
   );
   return renderLayoutPage(

app/lib/frontend/templates/views/landing/page.dart

@@ -4,6 +4,7 @@
 
 import 'package:_pub_shared/search/search_form.dart';
 import 'package:_pub_shared/search/tags.dart';
+import 'package:pub_dev/frontend/request_context.dart';
 
 import '../../../../package/models.dart';
 import '../../../../service/youtube/backend.dart';
@@ -20,6 +21,7 @@ d.Node landingPageNode({
   List<PackageView>? mostPopularPackages,
   List<PackageView>? topFlutterPackages,
   List<PackageView>? topDartPackages,
+  List<PackageView>? trendingPackages,
   List<PkgOfWeekVideo>? topPoWVideos,
 }) {
   return d.fragment([
@@ -34,7 +36,23 @@ d.Node landingPageNode({
         viewAllEvent: 'landing-flutter-favorites-view-all',
         viewAllTitle: 'Search Flutter Favorites packages',
       ),
-    if (_isNotEmptyList(mostPopularPackages))
+    if (requestContext.experimentalFlags.showTrending &&
+        _isNotEmptyList(trendingPackages))
+      _block(
+        shortId: 'mp',
+        image: d.Image.decorative(
+          src: staticUrls.getAssetUrl('/static/img/landing-01.webp'),
+          width: 351,
+          height: 240,
+        ),
+        title: 'Trending packages',
+        info: d.text('Some of the packages trending in the last 30 days'),
+        content: miniListNode('most-trending', trendingPackages!),
+        viewAllUrl: urls.listingByTrending(),
+        viewAllEvent: 'landing-trending-view-all',
+        viewAllTitle: 'Search trending packages',
+      )
+    else if (_isNotEmptyList(mostPopularPackages))
       _block(
         shortId: 'mp',
         image: d.Image.decorative(

app/lib/search/top_packages.dart

@@ -30,6 +30,8 @@ class TopPackages {
   );
   final _mostPopular =
       _cachedValue('top-packages-most-popular', order: SearchOrder.downloads);
+  final _trending =
+      _cachedValue('top-packages-trending', order: SearchOrder.trending);
   final _topDart = _cachedValue('top-packages-top-dart', query: SdkTag.sdkDart);
   final _topFlutter =
       _cachedValue('top-packages-top-flutter', query: SdkTag.sdkFlutter);
@@ -89,6 +91,10 @@ class TopPackages {
     return _randomSelection(_topFlutter, 6);
   }
 
+  List<PackageView> trending() {
+    return _randomSelection(_trending, 6);
+  }
+
   List<PackageView> _randomSelection(
       CachedValue<List<PackageView>> cachedValue, int count) {
     if (!cachedValue.isAvailable) {

app/lib/shared/urls.dart

@@ -206,6 +206,9 @@ String searchUrl({
 String listingByDownloadCounts() =>
     SearchForm(order: SearchOrder.downloads).toSearchLink();
 
+String listingByTrending() =>
+    SearchForm(order: SearchOrder.trending).toSearchLink();
+
 String dartSdkMainUrl(String version) {
   final isDev = version.contains('dev');
   final channel = isDev ? 'dev' : 'stable';