Add code to sort order by supplier when Enterprise user chooses to

app/helpers/application_helper.rb

@@ -57,4 +57,20 @@ module ApplicationHelper
       wicked_pdf_stylesheet_pack_tag(source)
     end
   end
+
+  def line_items_for_invoice(order)
+    if @order.distributor.preferred_invoice_order_by_supplier
+      order.line_items.sort do |a, b|
+        if a.supplier == b.supplier
+          a.product.name <=> b.product.name
+        else
+          a.supplier.name <=> b.supplier.name
+        end
+      end
+    else
+      order.line_items.sort do |a, b|
+        a.product.name <=> b.product.name
+      end
+    end
+  end
 end

app/models/spree/line_item.rb

@@ -226,7 +226,7 @@ module Spree
 
     def update_inventory
       return unless changed?
-
+   
       scoper.scope(variant)
       Spree::OrderInventory.new(order).verify(self, target_shipment)
     end
@@ -234,7 +234,7 @@ module Spree
     def update_order
       return unless saved_changes.present? || destroyed?
 
-      # update the order totals, etc.
+      # update the order totals, etc. 
       order.create_tax_charge!
     end
 

app/models/spree/order.rb

@@ -608,6 +608,14 @@ module Spree
       address
     end
 
+    def sorted_line_items
+      if distributor.preferred_invoice_order_by_supplier
+        line_items.sort_by { |li| [li.supplier.name, li.product.name] }
+      else
+        line_items.sort_by { |li| [li.product.name]}
+      end
+    end
+
     private
 
     def fee_handler

app/views/spree/admin/orders/_invoice_table.html.haml

@@ -10,7 +10,7 @@
       %th{:align => "right", :width => "15%"}
         %h4= t(:invoice_column_price)
   %tbody
-    - @order.line_items.sort_by{ |li| li.product.name }.each do |item|
+    - @order.sorted_line_items.each do |item|
       %tr
         %td
           = render 'spree/shared/line_item_name', line_item: item
@@ -23,6 +23,7 @@
           = item.included_tax > 0 ? item.display_included_tax : ""
         %td{:align => "right"}
           = item.display_amount_with_adjustments
+      
     - checkout_adjustments_for(@order, exclude: [:line_item]).reject{ |a| a.amount == 0 }.reverse_each do |adjustment|
       - taxable = adjustment.adjustable_type == "Spree::Shipment" ? adjustment.adjustable : adjustment
       %tr

app/views/spree/admin/orders/_invoice_table2.html.haml

@@ -13,7 +13,7 @@
         %th{:align => "right", :width => "15%"}
           %h5= t(:invoice_column_tax_rate)
   %tbody
-    - @order.line_items.sort_by{ |li| li.product.name }.each do |item|
+    - @order.sorted_line_items.each do |item|
       %tr
         %td
           = render 'spree/shared/line_item_name', line_item: item
@@ -29,6 +29,7 @@
         - if @order.total_tax > 0
           %td{:align => "right"}
             = display_line_item_tax_rates(item)
+
     - checkout_adjustments_for(@order, exclude: [:line_item]).reject{ |a| a.amount == 0 }.reverse_each do |adjustment|
       %tr
         %td