Include full address in ical event

When possible include the full address of the event's location in
the ical event instead of just the location name

app/helpers/ical_helper.rb

@@ -10,7 +10,7 @@ def icalendar(*events)
           item.dtstart     = event.date
           item.dtend       = event.end_date
           item.url         = event_url(event)
-          item.location    = event.location.name if event.location
+          item.location    = event.location&.calendar_event_address
         end
       end
     end.to_s

app/models/location.rb

@@ -30,6 +30,14 @@ def address
     "#{street} #{house_number}, #{zip} #{city}"
   end
 
+  def calendar_event_address
+    if [street, house_number, zip, city].all?(&:present?)
+      address
+    else
+      name
+    end
+  end
+
   def nice_url
     URI.parse(url).host
   end