Add caching for event description and formatted date details in Event model; update event row view to utilize new methods

Author: edsaperia

app/models/event.rb

@@ -9,4 +9,19 @@ class Event < ActiveRecord::Base
   def money_value
     Money.new(self.value, 'GBP')
   end
+
+  def description_html
+    Rails.cache.fetch("event_description_#{id}_#{updated_at.to_i}") do
+      Kramdown::Document.new(description).to_html.html_safe
+    end
+  end
+
+  def formatted_date_details
+    Rails.cache.fetch("event_date_#{id}_#{start_at.to_i}_#{end_at.to_i}") do
+      start_date = start_at.strftime('%a %d %^b %Y')
+      start_time = start_at.strftime('%l:%M%P').strip
+      end_time = end_at.strftime('%l:%M%P').strip
+      "#{start_date} • #{start_time} – #{end_time} • #{location}"
+    end
+  end
 end

app/views/events/_row.html.haml

@@ -1,24 +1,17 @@
-.event{ id: "event-#{event.id}" }
+- cache event do
+  .event{ id: "event-#{event.id}" }
+    .event-title= link_to event.name, event.url
+    - unless event.public?
+      %small (Private event)
 
-  .event-title= link_to event.name, event.url
-  - unless event.public?
-    %small (Private event)
+    = link_to events_path(anchor: "event-#{event.id}", id: event.id) do
+      .event-details= event.formatted_date_details
 
-  = link_to events_path(anchor: "event-#{event.id}", id: event.id) do
-    .event-details
-      = event.start_at.strftime('%a') + " " + event.start_at.strftime('%d') + " " + event.start_at.strftime('%^b') + " " + event.start_at.strftime('%Y')
-      •
-      = event.start_at.strftime('%l:%M%P')
-      \–
-      = event.end_at.strftime('%l:%M%P')
-      •
-      = event.location
+    .event-host= link_to event.organiser_name, event.organiser_url
 
-  .event-host= link_to event.organiser_name, event.organiser_url
+    = event.description_html
 
-  = Kramdown::Document.new(event.description).to_html.html_safe
+    = link_to "Register ↗", event.url, class: 'section-link'
 
-  = link_to "Register ↗", event.url, class: 'section-link'
-
-  - if can? :update, event
-    .event-actions= link_to 'Edit', edit_admin_event_path(event)
+    - if can? :update, event
+      .event-actions= link_to 'Edit', edit_admin_event_path(event)