Move object-name methods to PackageStorage.

app/lib/admin/backend.dart

@@ -12,7 +12,6 @@ import 'package:clock/clock.dart';
 import 'package:collection/collection.dart';
 import 'package:convert/convert.dart';
 import 'package:gcloud/service_scope.dart' as ss;
-import 'package:gcloud/storage.dart';
 import 'package:logging/logging.dart';
 import 'package:meta/meta.dart';
 import 'package:pool/pool.dart';
@@ -24,19 +23,14 @@ import '../account/models.dart';
 import '../admin/models.dart';
 import '../audit/models.dart';
 import '../package/backend.dart'
-    show
-        checkPackageVersionParams,
-        packageBackend,
-        purgePackageCache,
-        tarballObjectName;
+    show checkPackageVersionParams, packageBackend, purgePackageCache;
 import '../package/models.dart';
 import '../publisher/models.dart';
 import '../scorecard/backend.dart';
 import '../service/email/email_templates.dart';
 import '../shared/configuration.dart';
 import '../shared/datastore.dart';
 import '../shared/exceptions.dart';
-import '../shared/storage.dart';
 import '../shared/versions.dart';
 import '../task/backend.dart';
 import 'actions/actions.dart' show AdminAction;
@@ -794,9 +788,6 @@ class AdminBackend {
     @visibleForTesting DateTime? before,
   }) async {
     before ??= clock.ago(days: 3 * 366).toUtc(); // extra buffer days
-    final canonicalBucket =
-        storageService.bucket(activeConfiguration.canonicalPackagesBucketName!);
-
     // delete packages
     final pQuery = _db.query<Package>()
       ..filter('moderatedAt <', before)
@@ -829,11 +820,8 @@ class AdminBackend {
           'Deleting moderated package version: ${version.qualifiedVersionKey}');
 
       // deleting from canonical bucket
-      final objectName = tarballObjectName(version.package, version.version!);
-      final info = await canonicalBucket.tryInfo(objectName);
-      if (info != null) {
-        await canonicalBucket.delete(objectName);
-      }
+      await packageBackend.packageStorage
+          .deleteArchiveFromCanonicalBucket(version.package, version.version!);
 
       // deleting from datastore
       await withRetryTransaction(_db, (tx) async {

app/lib/package/backend.dart

@@ -1938,13 +1938,6 @@ DerivedPackageVersionEntities derivePackageVersionEntities({
   return DerivedPackageVersionEntities(versionInfo, assets);
 }
 
-/// The GCS object name of a tarball object - excluding leading '/'.
-String tarballObjectName(String package, String version) =>
-    '${tarballObjectNamePackagePrefix(package)}$version.tar.gz';
-
-/// The GCS object prefix of a tarball object for a given [package] - excluding leading '/'.
-String tarballObjectNamePackagePrefix(String package) => 'packages/$package-';
-
 /// The GCS object name of an temporary object [guid] - excluding leading '/'.
 @visibleForTesting
 String tmpObjectName(String guid) => 'tmp/$guid';

app/lib/package/package_storage.dart

@@ -11,6 +11,13 @@ import 'package:pub_dev/shared/storage.dart';
 
 final _logger = Logger('package_storage');
 
+/// The GCS object name of a tarball object - excluding leading '/'.
+String tarballObjectName(String package, String version) =>
+    '${_tarballObjectNamePackagePrefix(package)}$version.tar.gz';
+
+/// The GCS object prefix of a tarball object for a given [package] - excluding leading '/'.
+String _tarballObjectNamePackagePrefix(String package) => 'packages/$package-';
+
 class PackageStorage {
   final DatastoreDB _dbService;
   final Storage _storage;
@@ -32,6 +39,30 @@ class PackageStorage {
     this._publicBucket,
   );
 
+  /// Gets the object info of the archive file from the public bucket.
+  Future<ObjectInfo?> getCanonicalBucketArchiveInfo(
+      String package, String version) async {
+    final objectName = tarballObjectName(package, version);
+    return await _canonicalBucket.tryInfo(objectName);
+  }
+
+  /// Gets the object info of the archive file from the public bucket.
+  Future<ObjectInfo?> getPublicBucketArchiveInfo(
+      String package, String version) async {
+    final objectName = tarballObjectName(package, version);
+    return await _publicBucket.tryInfo(objectName);
+  }
+
+  /// Deletes the package archive file from the canonical bucket.
+  Future<void> deleteArchiveFromCanonicalBucket(
+      String package, String version) async {
+    final objectName = tarballObjectName(package, version);
+    final info = await _canonicalBucket.tryInfo(objectName);
+    if (info != null) {
+      await _canonicalBucket.delete(objectName);
+    }
+  }
+
   /// Updates the public package archive:
   /// - copies missing archive objects from canonical to public bucket,
   /// - deletes leftover objects from public bucket
@@ -92,8 +123,9 @@ class PackageStorage {
       objectNamesInPublicBucket.add(objectName);
     }
 
-    final filterForNamePrefix =
-        package == null ? 'packages/' : tarballObjectNamePackagePrefix(package);
+    final filterForNamePrefix = package == null
+        ? 'packages/'
+        : _tarballObjectNamePackagePrefix(package);
     await for (final entry in _publicBucket.list(prefix: filterForNamePrefix)) {
       // Skip non-objects.
       if (!entry.isObject) {

app/lib/shared/integrity.dart

@@ -9,7 +9,6 @@ import 'package:_pub_shared/search/tags.dart';
 import 'package:_pub_shared/utils/http.dart';
 import 'package:clock/clock.dart';
 import 'package:crypto/crypto.dart';
-import 'package:gcloud/storage.dart';
 import 'package:http/http.dart' as http;
 import 'package:logging/logging.dart';
 import 'package:pool/pool.dart';
@@ -604,10 +603,8 @@ class IntegrityChecker {
     Uri archiveDownloadUri, {
     required bool shouldBeInPublicBucket,
   }) async* {
-    final canonicalInfo = await storageService
-        .bucket(activeConfiguration.canonicalPackagesBucketName!)
-        // ignore: invalid_use_of_visible_for_testing_member
-        .tryInfo(tarballObjectName(pv.package, pv.version!));
+    final canonicalInfo = await packageBackend.packageStorage
+        .getCanonicalBucketArchiveInfo(pv.package, pv.version!);
     if (canonicalInfo == null) {
       yield 'PackageVersion "${pv.qualifiedVersionKey}" has no matching canonical archive file.';
       return;
@@ -631,10 +628,8 @@ class IntegrityChecker {
       yield 'Canonical archive for PackageVersion "${pv.qualifiedVersionKey}" differs from public bucket.';
     }
 
-    final publicInfo = await storageService
-        .bucket(activeConfiguration.publicPackagesBucketName!)
-        // ignore: invalid_use_of_visible_for_testing_member
-        .tryInfo(tarballObjectName(pv.package, pv.version!));
+    final publicInfo = await packageBackend.packageStorage
+        .getPublicBucketArchiveInfo(pv.package, pv.version!);
     if (!canonicalInfo.hasSameSignatureAs(publicInfo)) {
       yield 'Canonical archive for PackageVersion "${pv.qualifiedVersionKey}" differs in the public bucket.';
     }

app/test/admin/moderate_package_test.dart

@@ -8,7 +8,6 @@ import 'package:_pub_shared/data/account_api.dart';
 import 'package:_pub_shared/data/admin_api.dart';
 import 'package:_pub_shared/data/package_api.dart';
 import 'package:clock/clock.dart';
-import 'package:gcloud/storage.dart';
 import 'package:http/http.dart' as http;
 import 'package:pub_dev/account/backend.dart';
 import 'package:pub_dev/admin/actions/actions.dart';
@@ -21,7 +20,6 @@ import 'package:pub_dev/scorecard/backend.dart';
 import 'package:pub_dev/search/backend.dart';
 import 'package:pub_dev/shared/configuration.dart';
 import 'package:pub_dev/shared/datastore.dart';
-import 'package:pub_dev/shared/storage.dart';
 import 'package:test/test.dart';
 
 import '../admin/models_test.dart';
@@ -382,10 +380,9 @@ void main() {
       });
 
       // canonical file is present
-      final bucket = storageService
-          .bucket(activeConfiguration.canonicalPackagesBucketName!);
       expect(
-        await bucket.tryInfo(tarballObjectName('oxygen', '1.2.0')),
+        await packageBackend.packageStorage
+            .getCanonicalBucketArchiveInfo('oxygen', '1.2.0'),
         isNotNull,
       );
 
@@ -400,7 +397,8 @@ void main() {
         isNull,
       );
       expect(
-        await bucket.tryInfo(tarballObjectName('oxygen', '1.2.0')),
+        await packageBackend.packageStorage
+            .getCanonicalBucketArchiveInfo('oxygen', '1.2.0'),
         isNull,
       );
 

app/test/admin/moderate_package_version_test.dart

@@ -8,7 +8,6 @@ import 'package:_pub_shared/data/account_api.dart';
 import 'package:_pub_shared/data/admin_api.dart';
 import 'package:_pub_shared/data/package_api.dart';
 import 'package:clock/clock.dart';
-import 'package:gcloud/storage.dart';
 import 'package:http/http.dart' as http;
 import 'package:pub_dev/admin/backend.dart';
 import 'package:pub_dev/admin/models.dart';
@@ -20,7 +19,6 @@ import 'package:pub_dev/search/backend.dart';
 import 'package:pub_dev/shared/configuration.dart';
 import 'package:pub_dev/shared/datastore.dart';
 import 'package:pub_dev/shared/exceptions.dart';
-import 'package:pub_dev/shared/storage.dart';
 import 'package:pub_dev/task/backend.dart';
 import 'package:test/test.dart';
 
@@ -430,10 +428,9 @@ void main() {
         'cleanup deletes datastore entities and canonical archive file',
         fn: () async {
       // canonical file is present
-      final bucket = storageService
-          .bucket(activeConfiguration.canonicalPackagesBucketName!);
       expect(
-        await bucket.tryInfo(tarballObjectName('oxygen', '1.0.0')),
+        await packageBackend.packageStorage
+            .getCanonicalBucketArchiveInfo('oxygen', '1.0.0'),
         isNotNull,
       );
 
@@ -462,7 +459,8 @@ void main() {
 
       // canonical file is not present
       expect(
-        await bucket.tryInfo(tarballObjectName('oxygen', '1.0.0')),
+        await packageBackend.packageStorage
+            .getCanonicalBucketArchiveInfo('oxygen', '1.0.0'),
         isNull,
       );
 
@@ -472,7 +470,8 @@ void main() {
         isNotNull,
       );
       expect(
-        await bucket.tryInfo(tarballObjectName('oxygen', '1.2.0')),
+        await packageBackend.packageStorage
+            .getCanonicalBucketArchiveInfo('oxygen', '1.2.0'),
         isNotNull,
       );
     });

app/test/package/tarball_storage_namer_test.dart

@@ -4,6 +4,7 @@
 
 import 'package:gcloud/storage.dart';
 import 'package:pub_dev/package/backend.dart';
+import 'package:pub_dev/package/package_storage.dart';
 import 'package:pub_dev/shared/configuration.dart';
 import 'package:pub_dev/shared/storage.dart';
 import 'package:test/test.dart';