Display product count next to taxons in sidebar

app/controllers/application_controller.rb

@@ -1,10 +1,10 @@
 class ApplicationController < ActionController::Base
   protect_from_forgery
 
-  before_filter :load_suppliers_and_distributors
+  before_filter :load_data_for_sidebar
 
   private
-  def load_suppliers_and_distributors
+  def load_data_for_sidebar
     @suppliers = Spree::Supplier.all
     @distributors = Spree::Distributor.all
   end

app/helpers/spree/base_helper_decorator.rb

@@ -0,0 +1,19 @@
+module Spree
+  BaseHelper.class_eval do
+    def taxons_tree(root_taxon, current_taxon, max_level = 1)
+      return '' if max_level < 1 || root_taxon.children.empty?
+      content_tag :ul, :class => 'taxons-list' do
+        root_taxon.children.map do |taxon|
+          css_class = (current_taxon && current_taxon.self_and_ancestors.include?(taxon)) ? 'current' : nil
+          num_products = Product.in_taxon(taxon).count
+          content_tag :li, :class => css_class do
+           link_to(taxon.name, seo_url(taxon)) +
+              " (#{num_products})" +
+              taxons_tree(taxon, current_taxon, max_level - 1)
+          end
+        end.join("\n").html_safe
+      end
+    end
+
+  end
+end

spec/requests/consumer/taxonomy_spec.rb

@@ -0,0 +1,33 @@
+require 'spec_helper'
+
+feature %q{
+    As a consumer
+    I want to see product counts (for my chosen distributor) next to each taxon
+    So that I can locate products (at my chosen distributor)
+} do
+  include AuthenticationWorkflow
+  include WebHelper
+
+  scenario "viewing product counts when no distributor selected" do
+    # Given some taxons and some products
+    taxonomy = Spree::Taxonomy.find_by_name('Products') || create(:taxonomy, :name => 'Products')
+    taxonomy_root = taxonomy.root
+
+    taxon_one = create(:taxon, :name => 'Taxon one', :parent_id => taxonomy_root.id)
+    taxon_two = create(:taxon, :name => 'Taxon two', :parent_id => taxonomy_root.id)
+    taxon_three = create(:taxon, :name => 'Taxon three', :parent_id => taxonomy_root.id)
+
+    1.times { create(:product, :taxons => [taxon_one]) }
+    2.times { create(:product, :taxons => [taxon_two]) }
+    3.times { create(:product, :taxons => [taxon_three]) }
+
+    # When I visit the home page
+    visit spree.root_path
+
+    # Then I should see product counts next to the taxons
+    page.should have_selector 'nav#taxonomies li', :text => 'Taxon one (1)'
+    page.should have_selector 'nav#taxonomies li', :text => 'Taxon two (2)'
+    page.should have_selector 'nav#taxonomies li', :text => 'Taxon three (3)'
+  end
+
+end