1 files changed, 85 insertions, 0 deletions
diff --git a/app/services/packages/nuget/extract_metadata_content_service.rb b/app/services/packages/nuget/extract_metadata_content_service.rb
new file mode 100644
index 00000000000..28653654018
--- /dev/null
+++ b/app/services/packages/nuget/extract_metadata_content_service.rb
@@ -0,0 +1,85 @@
+# frozen_string_literal: true
+
+module Packages
+  module Nuget
+    class ExtractMetadataContentService
+      ROOT_XPATH = '//xmlns:package/xmlns:metadata/xmlns'
+
+      XPATHS = {
+        package_name: "#{ROOT_XPATH}:id",
+        package_version: "#{ROOT_XPATH}:version",
+        authors: "#{ROOT_XPATH}:authors",
+        description: "#{ROOT_XPATH}:description",
+        license_url: "#{ROOT_XPATH}:licenseUrl",
+        project_url: "#{ROOT_XPATH}:projectUrl",
+        icon_url: "#{ROOT_XPATH}:iconUrl"
+      }.freeze
+
+      XPATH_DEPENDENCIES = "#{ROOT_XPATH}:dependencies/xmlns:dependency".freeze
+      XPATH_DEPENDENCY_GROUPS = "#{ROOT_XPATH}:dependencies/xmlns:group".freeze
+      XPATH_TAGS = "#{ROOT_XPATH}:tags".freeze
+      XPATH_PACKAGE_TYPES = "#{ROOT_XPATH}:packageTypes/xmlns:packageType".freeze
+
+      def initialize(nuspec_file_content)
+        @nuspec_file_content = nuspec_file_content
+      end
+
+      def execute
+        ServiceResponse.success(payload: extract_metadata(nuspec_file_content))
+      end
+
+      private
+
+      attr_reader :nuspec_file_content
+
+      def extract_metadata(file)
+        doc = Nokogiri::XML(file)
+
+        XPATHS.transform_values { |query| doc.xpath(query).text.presence }
+              .compact
+              .tap do |metadata|
+                metadata[:package_dependencies] = extract_dependencies(doc)
+                metadata[:package_tags] = extract_tags(doc)
+                metadata[:package_types] = extract_package_types(doc)
+              end
+      end
+
+      def extract_dependencies(doc)
+        dependencies = []
+
+        doc.xpath(XPATH_DEPENDENCIES).each do |node|
+          dependencies << extract_dependency(node)
+        end
+
+        doc.xpath(XPATH_DEPENDENCY_GROUPS).each do |group_node|
+          target_framework = group_node.attr('targetFramework')
+
+          group_node.xpath('xmlns:dependency').each do |node|
+            dependencies << extract_dependency(node).merge(target_framework: target_framework)
+          end
+        end
+
+        dependencies
+      end
+
+      def extract_dependency(node)
+        {
+          name: node.attr('id'),
+          version: node.attr('version')
+        }.compact
+      end
+
+      def extract_tags(doc)
+        tags = doc.xpath(XPATH_TAGS).text
+
+        return [] if tags.blank?
+
+        tags.split(::Packages::Tag::NUGET_TAGS_SEPARATOR)
+      end
+
+      def extract_package_types(doc)
+        doc.xpath(XPATH_PACKAGE_TYPES).map { |node| node.attr('name') }.uniq
+      end
+    end
+  end
+end