Experimental: Show thirty days download counts on score page

app/lib/frontend/templates/views/pkg/score_tab.dart

@@ -2,12 +2,14 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+import 'package:_pub_shared/format/number_format.dart';
 import 'package:pana/models.dart';
 import 'package:pub_dev/shared/popularity_storage.dart';
 
 import '../../../../scorecard/models.dart' hide ReportStatus;
 import '../../../../shared/urls.dart' as urls;
 import '../../../dom/dom.dart' as d;
+import '../../../request_context.dart';
 import '../../../static_files.dart';
 import '../../package_misc.dart' show formatScore;
 
@@ -39,7 +41,9 @@ d.Node scoreTabNode({
       children: [
         _likeKeyFigureNode(likeCount),
         _pubPointsKeyFigureNode(report, showPending),
-        _popularityKeyFigureNode(card.popularityScore),
+        requestContext.experimentalFlags.showDownloadCounts
+            ? _downloadCountsKeyFigureNode(card.thirtyDaysDownloadCounts)
+            : _popularityKeyFigureNode(card.popularityScore),
       ],
     ),
     if (showPending)
@@ -266,6 +270,21 @@ d.Node _popularityKeyFigureNode(double? popularity) {
   );
 }
 
+d.Node _downloadCountsKeyFigureNode(int? downloadCounts) {
+  if (downloadCounts == null) {
+    return _keyFigureNode(
+      value: '--',
+      supplemental: '',
+      label: 'downloads',
+    );
+  }
+  return _keyFigureNode(
+    value: formatWith3SignificantDigits(downloadCounts).value,
+    supplemental: formatWith3SignificantDigits(downloadCounts).suffix,
+    label: 'downloads',
+  );
+}
+
 d.Node _pubPointsKeyFigureNode(Report? report, bool showPending) {
   if (report == null) {
     return _keyFigureNode(

app/lib/package/models.dart

@@ -1196,7 +1196,7 @@ class PackagePageData {
       scoreCard: scoreCard,
       popularity: popularityStorage.lookupAsScore(package.name!),
       thirtyDaysDownloadCounts:
-          downloadCountsBackend.lookup30DayTotalCounts(package.name!),
+          downloadCountsBackend.lookup30DaysTotalCounts(package.name!),
     );
   }
 }

app/lib/scorecard/backend.dart

@@ -99,7 +99,7 @@ class ScoreCardBackend {
         scoreCard: card,
         popularity: popularityStorage.lookupAsScore(package),
         thirtyDaysDownloadCounts:
-            downloadCountsBackend.lookup30DayTotalCounts(package),
+            downloadCountsBackend.lookup30DaysTotalCounts(package),
       );
     });
   }

app/lib/scorecard/models.dart

@@ -7,6 +7,7 @@ import 'dart:io';
 import 'package:_pub_shared/search/tags.dart';
 import 'package:json_annotation/json_annotation.dart';
 import 'package:pana/models.dart';
+import 'package:pub_dev/service/download_counts/backend.dart';
 import 'package:pub_dev/task/models.dart';
 
 import '../scorecard/backend.dart';
@@ -70,6 +71,9 @@ class ScoreCardData {
 
   // TODO: refactor code to use popularityStorage directly.
   double get popularityScore => popularityStorage.lookup(packageName!);
+
+  int? get thirtyDaysDownloadCounts =>
+      downloadCountsBackend.lookup30DaysTotalCounts(packageName!);
 }
 
 @JsonSerializable(includeIfNull: false)

app/lib/service/download_counts/backend.dart

@@ -78,7 +78,7 @@ class DownloadCountsBackend {
     await _thirtyDaysTotals.close();
   }
 
-  int? lookup30DayTotalCounts(String package) =>
+  int? lookup30DaysTotalCounts(String package) =>
       _thirtyDaysTotals.isAvailable ? _thirtyDaysTotals.value![package] : null;
 
   Future<CountData?> lookupDownloadCountData(String pkg) async {

app/test/service/download_counts/compute_total_download_counts_test.dart

@@ -102,22 +102,22 @@ void main() {
 
     testWithProfile('cache 30-days totals', fn: () async {
       await generateFake30DaysTotals({'foo': 70, 'bar': 105, 'baz': 140});
-      expect(downloadCountsBackend.lookup30DayTotalCounts('foo'), isNull);
-      expect(downloadCountsBackend.lookup30DayTotalCounts('bar'), isNull);
-      expect(downloadCountsBackend.lookup30DayTotalCounts('baz'), isNull);
+      expect(downloadCountsBackend.lookup30DaysTotalCounts('foo'), isNull);
+      expect(downloadCountsBackend.lookup30DaysTotalCounts('bar'), isNull);
+      expect(downloadCountsBackend.lookup30DaysTotalCounts('baz'), isNull);
 
       await downloadCountsBackend.start();
-      expect(downloadCountsBackend.lookup30DayTotalCounts('foo'), 70);
-      expect(downloadCountsBackend.lookup30DayTotalCounts('bar'), 105);
-      expect(downloadCountsBackend.lookup30DayTotalCounts('baz'), 140);
-      expect(downloadCountsBackend.lookup30DayTotalCounts('bax'), isNull);
+      expect(downloadCountsBackend.lookup30DaysTotalCounts('foo'), 70);
+      expect(downloadCountsBackend.lookup30DaysTotalCounts('bar'), 105);
+      expect(downloadCountsBackend.lookup30DaysTotalCounts('baz'), 140);
+      expect(downloadCountsBackend.lookup30DaysTotalCounts('bax'), isNull);
 
       await generateFake30DaysTotals({'foo': 90, 'bar': 120, 'baz': 150});
       await downloadCountsBackend.start();
-      expect(downloadCountsBackend.lookup30DayTotalCounts('foo'), 90);
-      expect(downloadCountsBackend.lookup30DayTotalCounts('bar'), 120);
-      expect(downloadCountsBackend.lookup30DayTotalCounts('baz'), 150);
-      expect(downloadCountsBackend.lookup30DayTotalCounts('bax'), isNull);
+      expect(downloadCountsBackend.lookup30DaysTotalCounts('foo'), 90);
+      expect(downloadCountsBackend.lookup30DaysTotalCounts('bar'), 120);
+      expect(downloadCountsBackend.lookup30DaysTotalCounts('baz'), 150);
+      expect(downloadCountsBackend.lookup30DaysTotalCounts('bax'), isNull);
     });
   });
 }