Display products cache integrity checker results on cache settings admin page

app/controllers/admin/cache_settings_controller.rb

@@ -0,0 +1,14 @@
+require 'open_food_network/products_cache_integrity_checker'
+
+class Admin::CacheSettingsController < Spree::Admin::BaseController
+
+  def show
+    active_exchanges = OpenFoodNetwork::ProductsCacheIntegrityChecker.active_exchanges
+    @results = active_exchanges.map do |exchange|
+      checker = OpenFoodNetwork::ProductsCacheIntegrityChecker.new(exchange.receiver, exchange.order_cycle)
+
+      {distributor: exchange.receiver, order_cycle: exchange.order_cycle, status: checker.ok?, diff: checker.diff}
+    end
+  end
+
+end

app/overrides/spree/admin/shared/_configuration_menu/add_caching.html.haml.deface

@@ -0,0 +1,4 @@
+/ insert_bottom "[data-hook='admin_configurations_sidebar_menu']"
+
+%li
+  = link_to 'Caching', main_app.admin_cache_settings_path

app/views/admin/cache_settings/show.html.haml

@@ -0,0 +1,18 @@
+- content_for :page_title do
+  = t(:cache_settings)
+
+%table.index
+  %thead
+    %tr
+      %th Distributor
+      %th Order Cycle
+      %th Status
+      %th Diff
+  %tbody
+    - @results.each do |result|
+      %tr
+        %td= result[:distributor].name
+        %td= result[:order_cycle].name
+        %td= result[:status] ? 'OK' : 'Error'
+        %td
+          %pre= result[:diff].to_s(:text)

config/routes.rb

@@ -122,6 +122,8 @@ Openfoodnetwork::Application.routes.draw do
 
     resource :business_model_configuration, only: [:edit, :update], controller: 'business_model_configuration'
 
+    resource :cache_settings
+
     resource :account, only: [:show], controller: 'account'
   end
 

spec/features/admin/caching_spec.rb

@@ -0,0 +1,43 @@
+require 'spec_helper'
+require 'open_food_network/products_renderer'
+
+feature 'Caching' do
+  include AuthenticationWorkflow
+  include WebHelper
+
+  before { quick_login_as_admin }
+
+  describe "displaying integrity checker results" do
+    let(:distributor) { create(:distributor_enterprise) }
+    let(:order_cycle) { create(:open_order_cycle, distributors: [distributor]) }
+
+    it "displays results when things are good" do
+      # Given matching data
+      Rails.cache.write "products-json-#{distributor.id}-#{order_cycle.id}", "[1, 2, 3]\n"
+      OpenFoodNetwork::ProductsRenderer.stub(:new) { double(:pr, products_json: "[1, 2, 3]\n") }
+
+      # When I visit the cache status page
+      visit spree.admin_path
+      click_link 'Configuration'
+      click_link 'Caching'
+
+      # Then I should see some status information
+      page.should have_content "OK"
+    end
+
+    it "displays results when there are errors" do
+      # Given matching data
+      Rails.cache.write "products-json-#{distributor.id}-#{order_cycle.id}", "[1, 2, 3]\n"
+      OpenFoodNetwork::ProductsRenderer.stub(:new) { double(:pr, products_json: "[1, 3]\n") }
+
+      # When I visit the cache status page
+      visit spree.admin_path
+      click_link 'Configuration'
+      click_link 'Caching'
+
+      # Then I should see some status information
+      page.should have_content "Error"
+    end
+
+  end
+end