refactored conferences controller, dividing responsabilities using an service and an query

app/services/conferences/show_variables_fetcher.rb

@@ -0,0 +1,72 @@
+
+  module Conferences
+    class ShowVariablesFetcher
+      def initialize(conference: nil)
+        @conference = conference
+        @cfps = @conference&.program&.cfps
+        @splashpage = @conference&.splashpage
+      end
+    
+      def conference_image_url(request)
+        "#{request.protocol}#{request.host}#{conference.picture}"
+      end
+    
+      def event_types_and_track_names(call_for_events)
+        [event_types, track_names] if call_for_events.try(:open?)
+      end
+    
+      def cfp_call_by_type(type)
+        @cfps.find { |call| call.cfp_type == type }
+      end
+    
+      def fetch_tracks
+        tracks if @splashpage.include_tracks
+      end
+    
+      def fetch_booths
+        booths if @splashpage.include_booths
+      end
+    
+      def fetch_tickets
+        if @splashpage.include_registrations || @splashpage.include_tickets
+          tickets
+        end
+      end
+    
+      def fetch_lodgings
+        lodgings if @splashpage.include_lodgings
+      end
+    
+      def sponsorship_levels
+        Queries::Conferences.new(conference: conference).sponsorship_levels
+      end
+    
+      private
+      
+      attr :conference
+
+      def lodgings
+        conference.lodgings.order('name')
+      end
+    
+      def track_names
+        conference.confirmed_tracks.pluck(:name).sort
+      end
+    
+      def event_types
+        conference.event_types.pluck(:title)
+      end
+    
+      def tracks
+        Queries::Conferences.new(conference: conference).confirmed_tracks
+      end
+    
+      def booths
+        conference.confirmed_booths.order('title')
+      end
+    
+      def tickets
+        conference.tickets.order('price_cents')
+      end
+    end
+  end