1 files changed, 40 insertions, 0 deletions
diff --git a/app/graphql/types/packages/package_dependency_link_type.rb b/app/graphql/types/packages/package_dependency_link_type.rb
new file mode 100644
index 00000000000..eceb8319748
--- /dev/null
+++ b/app/graphql/types/packages/package_dependency_link_type.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+module Types
+  module Packages
+    class PackageDependencyLinkType < BaseObject
+      graphql_name 'PackageDependencyLink'
+      description 'Represents a package dependency link'
+      authorize :read_package
+
+      field :id, ::Types::GlobalIDType[::Packages::DependencyLink], null: false, description: 'ID of the dependency link.'
+      field :dependency_type, Types::Packages::PackageDependencyTypeEnum, null: false, description: 'Dependency type.'
+      field :dependency, Types::Packages::PackageDependencyType, null: true, description: 'Dependency.'
+      field :metadata, Types::Packages::DependencyLinkMetadataType, null: true, description: 'Dependency link metadata.'
+
+      # NOTE: This method must be kept in sync with the union
+      # type: `Types::Packages::DependencyLinkMetadata`.
+      #
+      # `Types::Packages::DependencyLinkMetadata.resolve_type(metadata, ctx)` must never raise.
+      def metadata
+        model_class = case object.package.package_type
+                      when 'nuget'
+                        ::Packages::Nuget::DependencyLinkMetadatum
+                      end
+
+        return unless model_class
+
+        # rubocop: disable CodeReuse/ActiveRecord
+        BatchLoader::GraphQL.for(object.id).batch do |ids, loader|
+          results = model_class.where(dependency_link_id: ids)
+          results.each { |record| loader.call(record.dependency_link_id, record) }
+        end
+        # rubocop: enable CodeReuse/ActiveRecord
+      end
+
+      def dependency
+        ::Gitlab::Graphql::Loaders::BatchModelLoader.new(::Packages::Dependency, object.dependency_id).find
+      end
+    end
+  end
+end