Add pagination on enterprises page for super admin

Enterprises are stored in `@enterprise_set` variables, and we iterate over to show the list of enterprises to super admin.

Previously, we used to use `Sets::EnterpriseSet.new(collection)` instead of creating set based on `@collection`: this leads to call the `collection` method twice, which was probably very time consuming. This commit fix also that.

+ use paginated enterprises loading on bulk update but without testing if the current user is an admin

app/controllers/admin/enterprises_controller.rb

@@ -8,12 +8,13 @@ module Admin
   class EnterprisesController < Admin::ResourceController
     include GeocodeEnterpriseAddress
     include CablecarResponses
+    include Pagy::Backend
 
     # These need to run before #load_resource so that @object is initialised with sanitised values
     prepend_before_action :override_owner, only: :create
     prepend_before_action :override_sells, only: :create
 
-    before_action :load_enterprise_set, only: :index
+    before_action :load_enterprise_set_on_index, only: :index
     before_action :load_countries, except: [:index, :register, :check_permalink]
     before_action :load_methods_and_fees, only: [:edit, :update]
     before_action :load_groups, only: [:new, :edit, :update, :create]
@@ -100,7 +101,8 @@ module Admin
     end
 
     def bulk_update
-      @enterprise_set = Sets::EnterpriseSet.new(collection, bulk_params)
+      load_enterprise_set_with_params(bulk_params)
+
       if @enterprise_set.save
         flash[:success] = I18n.t(:enterprise_bulk_update_success_notice)
 
@@ -148,8 +150,15 @@ module Admin
 
     private
 
-    def load_enterprise_set
-      @enterprise_set = Sets::EnterpriseSet.new(collection) if spree_current_user.admin?
+    def load_enterprise_set_on_index
+      return unless spree_current_user.admin?
+
+      load_enterprise_set_with_params
+    end
+
+    def load_enterprise_set_with_params(params = {})
+      @pagy, @paginated_collection = pagy(@collection)
+      @enterprise_set = Sets::EnterpriseSet.new(@paginated_collection, params)
     end
 
     def load_countries

app/views/admin/enterprises/_admin_index.html.haml

@@ -38,3 +38,5 @@
         %tr
           %td{colspan: "4"}= t(:none)
   = f.submit t(:update)
+
+  = render partial: 'admin/shared/pagy_links', locals: { pagy: @pagy }