From e77710c6b633e41c8f9edd5ca9c9dffb1657c860 Mon Sep 17 00:00:00 2001
From: Jason Zimdars <jz@37signals.com>
Date: Wed, 9 Jul 2025 10:08:47 -0500
Subject: [PATCH] Cards inherit their collection's publication status

---
 app/controllers/concerns/public_card_scoped.rb | 13 +++++++++++++
 app/controllers/public/cards_controller.rb     | 12 ++++++++++++
 config/routes.rb                               |  6 ++++++
 3 files changed, 31 insertions(+)
 create mode 100644 app/controllers/concerns/public_card_scoped.rb
 create mode 100644 app/controllers/public/cards_controller.rb

diff --git a/app/controllers/concerns/public_card_scoped.rb b/app/controllers/concerns/public_card_scoped.rb
new file mode 100644
index 000000000..7416609ef
--- /dev/null
+++ b/app/controllers/concerns/public_card_scoped.rb
@@ -0,0 +1,13 @@
+module PublicCardScoped
+  extend ActiveSupport::Concern
+
+  included do
+    before_action :set_collection_and_card
+  end
+
+  private
+    def set_collection_and_card
+      @collection = Collection.find_by_published_key(params[:collection_id])
+      @card = @collection.cards.find(params[:id])
+    end
+end
diff --git a/app/controllers/public/cards_controller.rb b/app/controllers/public/cards_controller.rb
new file mode 100644
index 000000000..060c43871
--- /dev/null
+++ b/app/controllers/public/cards_controller.rb
@@ -0,0 +1,12 @@
+class Public::CardsController < ApplicationController
+  include PublicCardScoped
+
+  allow_unauthenticated_access only: :show
+
+  layout "public"
+
+  def show
+    # To enable caching at intermediate proxies during traffic spikes
+    expires_in 5.seconds, public: true
+  end
+end
diff --git a/config/routes.rb b/config/routes.rb
index 99213b019..07290777b 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -134,6 +134,8 @@ Rails.application.routes.draw do
       scope module: :collections do
         resources :card_previews
       end
+
+      resources :cards, only: :show
     end
   end
 
@@ -141,6 +143,10 @@ Rails.application.routes.draw do
     route_for :public_collection, collection.publication.key
   end
 
+  direct :published_card do |card, options|
+    route_for :public_collection_card, card.collection.publication.key, card
+  end
+
   resolve "Card" do |card, options|
     route_for :collection_card, card.collection, card, options
   end