allow review and approve

app/models/medical_release.rb

@@ -100,6 +100,18 @@ class MedicalRelease < ApplicationRecord
     "#{project.name.parameterize}_#{contract_template.release_type}_#{(signed_at || created_at).strftime("%Y.%m.%d")}_#{release_number}_#{filename_suffix.parameterize}"
   end
 
+  def approve_by(user)
+    return unless approved_at.nil?
+
+    self.approved_by_user_name = user.full_name
+    self.approved_by_user_email = user.email
+    self.approved_at = DateTime.now
+  end
+
+  def approved?
+    approved_at.present?
+  end
+
   private
 
   def valid_answers