app/models/import.rb in reso-0.1.0.3 vs app/models/import.rb in reso-0.1.1.0

@@ -7,9 +7,18 @@
   
   validates_uniqueness_of :token
 
   before_save :set_import_format
 
+  def remove_listings_no_longer_present fresh_listing_keys
+    existing_listing_keys = self.listings.all.pluck(:listing_key)
+    stale_listing_keys = existing_listing_keys.delete_if{|key| fresh_listing_keys.include? key }
+    stale_listing_keys.each do |listing_key|
+      Listing.find_by(listing_key: listing_key).destroy
+    end
+    stale_listing_keys
+  end
+
   def set_import_format
     self.import_format = ImportFormat.find_by(name: 'reso') unless self.import_format.present?
   end
 
 end