inventory development

app/models/inventory_definition.rb

@@ -1,2 +1,39 @@
 class InventoryDefinition < ApplicationRecord
+
+  scope :active, -> {where(:is_active => true)}
+
+  def calculate_product_count(saleObj)
+    saleObj.sale_items.each do |item|
+      found, inventory_definition = find_product_in_inventory(item)
+      if found
+        check_balance(item,inventory_definition)
+      end
+    end
+  end
+
+  def self.find_product_in_inventory(item)
+    product = InventoryDefinition.find_by_item_code(item.product_code)
+    if product.nil?
+      return false, nil
+    else
+      return true, product
+    end
+  end
+
+  def self.check_balance(item,inventory_definition)
+     stock = StockJournal.where('item_code=?', item.item_code).order('created_at desc').take
+     unless stock.nil?
+       modify_balance(item, stock.balance, inventory_definition)
+     end
+  end
+
+  def self.modify_balance(item, stock_balance, inventory_definition)
+     if stock.balance.to_i >= item.qty
+       puts ">> stock is greater than orde qty"
+       add_to_journal(item, balance, "ok", inventory_definition)
+     else
+       puts " << stock is less than order qty"
+       add_to_journal(item, balance, "out of stock", inventory_definition)
+     end
+  end
 end