improve receipt/details reports and implement number formatting

1) eager load reports for receipt/details
2) introduce number_format lookups to replace print_settings for number formatting
3) implement NumberFormattable concern, reference number_format lookups or print_settings if not exist, to get number format settings and number formatting
4) replace rails NumberHelper.number_with_precision with NumberFormattable.number_format hopefully to reduce overhead, formatting numbers for huge lists of data

app/pdf/order_summary_slim_pdf.rb

@@ -1,5 +1,5 @@
 class OrderSummarySlimPdf < Prawn::Document
-  include ActionView::Helpers::NumberHelper
+  include NumberFormattable
   attr_accessor :label_width,:price_column_width,:page_width, :page_height, :margin, :price_width, :item_width, :header_font_size, :item_font_size,:item_height,:qty_width,:total_width,:item_description_width
   def initialize(print_settings,order, print_status, order_items = nil,alt_name,before_updated_qty)
     self.page_width = print_settings.page_width
@@ -11,9 +11,9 @@ class OrderSummarySlimPdf < Prawn::Document
     self.qty_width = 40
     self.total_width = 40  # No Need for item
     self.item_width = self.page_width - (self.qty_width - self.margin)
-    self.item_height = 15   
+    self.item_height = 15
     self.item_description_width = self.page_width - (self.price_width + self.qty_width + self.total_width)
-    self.label_width=90     
+    self.label_width=90
 
     super(:margin => [print_settings.heading_space, self.margin, self.margin, self.margin], :page_size => [self.page_width, self.page_height])
 
@@ -37,7 +37,7 @@ class OrderSummarySlimPdf < Prawn::Document
     else
       text "#{ print_status }", :size => self.header_font_size,:align => :center, :left_margin => -20
     end
-    
+
     stroke_horizontal_rule
     move_down 1
 
@@ -46,38 +46,38 @@ class OrderSummarySlimPdf < Prawn::Document
 
     # order items
     if order_items == nil
-      order_items(order, alt_name, print_settings.precision)
+      order_items(order, alt_name, precision)
     else
-      order_items(order_items, alt_name, print_settings.precision)
+      order_items(order_items, alt_name, precision)
     end
   end
 
   # Write Order Information to PDF
-  def order_info(order_no, order_by, order_at)    
+  def order_info(order_no, order_by, order_at)
     #booking ID
     booking_id = get_booking_id(order_no)
 
     y_position = cursor
     bounding_box([0,y_position], :width => self.item_width, :height => self.item_height) do
-        text "Booking: #{booking_id}", :size => self.item_font_size,:align => :left    
-    end
-
-    move_down 1  
-    y_position = cursor
-    bounding_box([0,y_position], :width => self.item_width, :height => self.item_height) do
-        text "OrderNo: #{order_no} ", :size => self.item_font_size,:align => :left    
+        text "Booking: #{booking_id}", :size => self.item_font_size,:align => :left
     end
 
     move_down 1
     y_position = cursor
     bounding_box([0,y_position], :width => self.item_width, :height => self.item_height) do
-        text "OrderBy: #{order_by} ", :size => self.item_font_size,:align => :left    
+        text "OrderNo: #{order_no} ", :size => self.item_font_size,:align => :left
     end
 
     move_down 1
     y_position = cursor
     bounding_box([0,y_position], :width => self.item_width, :height => self.item_height) do
-        text "Date: #{order_at.utc.getlocal.strftime("%Y-%m-%d %I:%M %p")}", :size => self.item_font_size,:align => :left    
+        text "OrderBy: #{order_by} ", :size => self.item_font_size,:align => :left
+    end
+
+    move_down 1
+    y_position = cursor
+    bounding_box([0,y_position], :width => self.item_width, :height => self.item_height) do
+        text "Date: #{order_at.utc.getlocal.strftime("%Y-%m-%d %I:%M %p")}", :size => self.item_font_size,:align => :left
     end
 
     stroke_horizontal_rule
@@ -102,7 +102,7 @@ class OrderSummarySlimPdf < Prawn::Document
 
     #Add Order Item
     add_order_items(order_item, alt_name, precision)
-    
+
   end
 
   # Add order items under order info
@@ -112,7 +112,7 @@ class OrderSummarySlimPdf < Prawn::Document
     move_down 1
 
     order_item.each do|odi|
-      # check for item not to show 
+      # check for item not to show
       # if odi.price != 0
         y_position = cursor
 
@@ -122,14 +122,14 @@ class OrderSummarySlimPdf < Prawn::Document
         end
 
         bounding_box([self.item_width,y_position], :width => self.qty_width) do
-          text "#{number_with_precision(odi.qty, :precision => precision.to_i)}", :size => self.item_font_size,:align => :left
+          text "#{number_format(odi.qty, :precision => precision.to_i)}", :size => self.item_font_size,:align => :left
         end
 
         bounding_box([0,y_position], :width => self.item_width) do
           text "#{odi.item_name}", :size => self.item_font_size,:align => :left
 
         end
-        
+
         if alt_name
           if !(odi.alt_name).empty?
             move_down 1
@@ -141,7 +141,7 @@ class OrderSummarySlimPdf < Prawn::Document
 
         # add option
         options = odi.options == "[]"? "" : odi.options
-        
+
         if options != ""
           move_down 1
 
@@ -159,7 +159,7 @@ class OrderSummarySlimPdf < Prawn::Document
         stroke_horizontal_line 0, (self.page_width - self.margin)
         move_down 1
       # end
-    end        
+    end
   end
 
   def get_booking_id(order_no)