stat referrers, locations, and paths

models/stat_path.rb

@@ -1,3 +1,15 @@
 class StatPath < Sequel::Model
-  many_to_one :stat
+  RETAINMENT_PERIOD = 7.days
+
+  many_to_one :site
+
+  def self.create_or_get(site_id, name)
+    opts = {site_id: site_id, name: name}
+    stat_path = where(opts).where{created_at > RETAINMENT_PERIOD.ago}.first
+    DB[table_name].lock('EXCLUSIVE') {
+      stat_path = create opts.merge created_at: Date.today
+    } if stat_path.nil?
+
+    stat_path
+  end
 end