1 files changed, 8 insertions, 77 deletions

diff --git a/app/presenters/packages/npm/package_presenter.rb b/app/presenters/packages/npm/package_presenter.rb
index 57bdd373309..42f61182ab8 100644
--- a/app/presenters/packages/npm/package_presenter.rb
+++ b/app/presenters/packages/npm/package_presenter.rb
@@ -3,94 +3,25 @@
 module Packages
   module Npm
     class PackagePresenter
-      include API::Helpers::RelatedResourcesHelpers
-
-      # Allowed fields are those defined in the abbreviated form
-      # defined here: https://github.com/npm/registry/blob/master/docs/responses/package-metadata.md#abbreviated-version-object
-      # except: name, version, dist, dependencies and xDependencies. Those are generated by this presenter.
-      PACKAGE_JSON_ALLOWED_FIELDS = %w[deprecated bin directories dist engines _hasShrinkwrap].freeze
-
-      attr_reader :name, :packages
+      def initialize(metadata)
+        @metadata = metadata
+      end
 
-      def initialize(name, packages)
-        @name = name
-        @packages = packages
+      def name
+        metadata[:name]
       end
 
       def versions
-        package_versions = {}
-
-        packages.each_batch do |relation|
-          batched_packages = relation.including_dependency_links
-                                     .preload_files
-                                     .preload_npm_metadatum
-
-          batched_packages.each do |package|
-            package_file = package.installable_package_files.last
-
-            next unless package_file
-
-            package_versions[package.version] = build_package_version(package, package_file)
-          end
-        end
-
-        package_versions
+        metadata[:versions]
       end
 
       def dist_tags
-        build_package_tags.tap { |t| t["latest"] ||= sorted_versions.last }
+        metadata[:dist_tags]
       end
 
       private
 
-      def build_package_tags
-        package_tags.to_h { |tag| [tag.name, tag.package.version] }
-      end
-
-      def build_package_version(package, package_file)
-        abbreviated_package_json(package).merge(
-          name: package.name,
-          version: package.version,
-          dist: {
-            shasum: package_file.file_sha1,
-            tarball: tarball_url(package, package_file)
-          }
-        ).tap do |package_version|
-          package_version.merge!(build_package_dependencies(package))
-        end
-      end
-
-      def tarball_url(package, package_file)
-        expose_url "#{api_v4_projects_path(id: package.project_id)}" \
-          "/packages/npm/#{package.name}" \
-          "/-/#{package_file.file_name}"
-      end
-
-      def build_package_dependencies(package)
-        dependencies = Hash.new { |h, key| h[key] = {} }
-
-        package.dependency_links.each do |dependency_link|
-          dependency = dependency_link.dependency
-          dependencies[dependency_link.dependency_type][dependency.name] = dependency.version_pattern
-        end
-
-        dependencies
-      end
-
-      def sorted_versions
-        versions = packages.pluck_versions.compact
-        VersionSorter.sort(versions)
-      end
-
-      def package_tags
-        Packages::Tag.for_package_ids(packages.last_of_each_version_ids)
-                     .preload_package
-      end
-
-      def abbreviated_package_json(package)
-        json = package.npm_metadatum&.package_json || {}
-        json.slice(*PACKAGE_JSON_ALLOWED_FIELDS)
-      end
+      attr_reader :metadata
     end
   end
 end