Add feed to updates

Author: miharekar

app/controllers/updates_controller.rb

@@ -11,7 +11,13 @@ def index
     @updates, @cursor = paginate_with_cursor(Update, items: 3, by: :published_at, before: params[:before])
   end
 
+  def feed
+    @updates = Update.order(published_at: :desc)
+    render formats: :rss
+  end
+
   def show
+    redirect_to updates_path, notice: "Update not found" unless @update
   end
 
   def new

app/views/updates/feed.rss.builder

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+xml.instruct! :xml, version: "1.0"
+xml.rss version: "2.0" do
+  xml.channel do
+    xml.title "Visualizer Updates"
+    xml.description "These are the latest updates from Visualizer"
+    xml.link feed_updates_url
+    xml.lastBuildDate @updates.first.published_at.rfc822
+
+    @updates.each do |update|
+      xml.item do
+        xml.title update.title
+        xml.description update.excerpt
+        xml.link update_url(update.slug.presence || update.id)
+        xml.guid update_url(update.slug.presence || update.id), isPermaLink: true
+        xml.pubDate update.published_at.rfc822
+      end
+    end
+  end
+end

app/views/updates/index.html.erb

@@ -1,4 +1,5 @@
 <% content_for(:html_title) { "Visualizer | Updates" } %>
+<% content_for(:head) { auto_discovery_link_tag :rss, feed_updates_path(format: :rss) } %>
 <div class="max-w-4xl px-4 mx-auto my-6 sm:px-6">
   <% if current_user&.admin %>
     <div class="text-xs text-right">

config/routes.rb

@@ -76,7 +76,9 @@
 
   resources :yearly_brew, only: %i[index show]
   resources :stats, only: [:index]
-  resources :updates, except: %i[destroy]
+  resources :updates, except: %i[destroy] do
+    get :feed, on: :collection
+  end
   get "/changes(/*path)", to: redirect { |params| "/updates/#{params[:path]}" }
 
   post :airtable, to: "airtable#notification"