Extract caching of homepage stats to service

app/controllers/home_controller.rb

@@ -18,9 +18,11 @@ class HomeController < BaseController
 
   private
 
-  # Cache the value of the query count for 24 hours
+  # Cache the value of the query count
   def cached_count(key, query)
-    Rails.cache.fetch("home_stats_count_#{key}", expires_in: 1.day, race_condition_ttl: 10) do
+    CacheService.cache("home_stats_count_#{key}",
+                       expires_in: CacheService::HOME_STATS_EXPIRY,
+                       race_condition_ttl: 10) do
       query.count
     end
   end

app/services/cache_service.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 class CacheService
+  HOME_STATS_EXPIRY = 1.day.freeze
   FILTERS_EXPIRY = 30.seconds.freeze
 
   def self.cache(cache_key, options = {})