1 files changed, 60 insertions, 0 deletions
diff --git a/app/services/packages/nuget/process_package_file_service.rb b/app/services/packages/nuget/process_package_file_service.rb
new file mode 100644
index 00000000000..fa7a84ee3d6
--- /dev/null
+++ b/app/services/packages/nuget/process_package_file_service.rb
@@ -0,0 +1,60 @@
+# frozen_string_literal: true
+
+module Packages
+  module Nuget
+    class ProcessPackageFileService
+      ExtractionError = Class.new(StandardError)
+      NUGET_SYMBOL_FILE_EXTENSION = '.snupkg'
+
+      def initialize(package_file)
+        @package_file = package_file
+      end
+
+      def execute
+        raise ExtractionError, 'invalid package file' unless valid_package_file?
+
+        nuspec_content = nil
+
+        with_zip_file do |zip_file|
+          nuspec_content = nuspec_file_content(zip_file)
+          create_symbol_files(zip_file) if symbol_package_file?
+        end
+
+        ServiceResponse.success(payload: { nuspec_file_content: nuspec_content })
+      end
+
+      private
+
+      attr_reader :package_file
+
+      def valid_package_file?
+        package_file &&
+          package_file.package&.nuget? &&
+          package_file.file.size > 0 # rubocop:disable Style/ZeroLengthPredicate
+      end
+
+      def with_zip_file(&block)
+        package_file.file.use_open_file(unlink_early: false) do |open_file|
+          Zip::File.open(open_file.file_path, &block) # rubocop: disable Performance/Rubyzip
+        end
+      end
+
+      def nuspec_file_content(zip_file)
+        ::Packages::Nuget::ExtractMetadataFileService
+          .new(zip_file)
+          .execute
+          .payload
+      end
+
+      def create_symbol_files(zip_file)
+        ::Packages::Nuget::Symbols::CreateSymbolFilesService
+          .new(package_file.package, zip_file)
+          .execute
+      end
+
+      def symbol_package_file?
+        package_file.file_name.end_with?(NUGET_SYMBOL_FILE_EXTENSION)
+      end
+    end
+  end
+end