change json format and void api

app/controllers/api/void_controller.rb

@@ -0,0 +1,42 @@
+class Api::VoidController <  Api::ApiController
+   	# skip_before_action  :authenticate
+   	def overall_void
+		sale_id = params[:sale_id]
+		order_source = "emenu" #tax profile source
+		if Sale.exists?(sale_id)
+			sale = Sale.find_by_sale_id(sale_id)
+
+			if sale.discount_type == "member_discount"
+				sale.update_attributes(total_discount: 0)
+				sale.compute_by_sale_items(sale_id, sale.sale_items,0,order_source)
+			end
+
+			# update count for shift sale
+			if(sale.sale_status == "completed")
+				if sale.shift_sale_id != nil
+				  shift = ShiftSale.find(sale.shift_sale_id)
+				  shift.calculate(sale_id, "void")
+				end
+			else
+				# void before sale payment complete
+				if sale.shift_sale_id != nil
+				  shift = ShiftSale.find(sale.shift_sale_id)
+				  shift.total_void = shift.total_void + sale.grand_total
+				  shift.save
+				end
+			end
+		        
+			sale.rounding_adjustment = 0.0
+			sale.payment_status = 'void'
+			sale.sale_status = 'void'
+			sale.save
+		  
+		  	# remark = "Void Sale ID #{sale_id} | Receipt No #{sale.receipt_no} | Receipt No #{sale.receipt_no} | Table ->#{table.name}"
+		  	sale_audit = SaleAudit.record_audit_for_edit(sale_id,current_login_employee.name, current_login_employee.name,nil,"SALEVOID" )
+			render json: JSON.generate({:status => true, :message => "Void successfully."})
+		else
+			render json: JSON.generate({:status => false, :error_message => "There is no sale for '#{params[:sale_id]}'!"})
+		end
+	end 
+end
+