update receipt bill pdf for foc and credit

app/pdf/receipt_bill_pdf.rb

@@ -54,8 +54,9 @@ class ReceiptBillPdf < Prawn::Document
     end
 
     items_account(item_price_by_accounts,printer_settings.precision,delimiter)
+    
+    sign(sale_data)
 
-  
     footer(printed_status)
   end
 
@@ -409,6 +410,42 @@ class ReceiptBillPdf < Prawn::Document
         end
     end
 
+    def sign(sale_data)
+        SalePayment.where('sale_id = ?', sale_data.sale_id).each do |payment|        
+            if payment.payment_method == "creditnote"
+
+                y_position = cursor
+                stroke_horizontal_rule
+                
+                bounding_box([self.label_width,y_position], :width =>self.item_description_width) do
+                   move_down 35
+                   stroke_horizontal_rule
+                end
+                
+                bounding_box([self.label_width,y_position], :width =>self.item_description_width) do
+                   move_down 38
+                   text "Approved By" , :size => self.item_font_size,:align => :center
+                end
+            end
+        end
+        if sale_data.sale_status == "FOC"
+
+            y_position = cursor
+            stroke_horizontal_rule
+
+            bounding_box([self.label_width,y_position], :width =>self.item_description_width) do
+                move_down 35
+                stroke_horizontal_rule
+            end  
+   
+             bounding_box([0,y_position], :width =>self.item_width, :height => self.item_height) do
+                move_down 38
+                text "Acknowledged By", :size => self.item_font_size,:align => :center
+             end
+        end
+        
+    end
+
     def footer(printed_status)
         move_down 5
         stroke_horizontal_rule