Add transport costs to Order

app/models/group_order.rb

@@ -94,4 +94,9 @@ class GroupOrder < ApplicationRecord
     ordergroup ? ordergroup.name : I18n.t('model.group_order.stock_ordergroup_name', :user => updated_by.try(:name) || '?')
   end
 
+  def total
+    return price + transport if transport
+    price
+  end
+
 end

app/models/order.rb

@@ -1,7 +1,7 @@
 # encoding: utf-8
 #
 class Order < ApplicationRecord
-  attr_accessor :ignore_warnings
+  attr_accessor :ignore_warnings, :transport_distribution
 
   # Associations
   has_many :order_articles, :dependent => :destroy
@@ -17,6 +17,7 @@ class Order < ApplicationRecord
   belongs_to :created_by, :class_name => 'User', :foreign_key => 'created_by_user_id'
 
   enum end_action: { no_end_action: 0, auto_close: 1, auto_close_and_send: 2, auto_close_and_send_min_quantity: 3 }
+  enum transport_distribution: [:skip, :ordergroup, :price, :articles]
 
   # Validations
   validates_presence_of :starts
@@ -25,6 +26,7 @@ class Order < ApplicationRecord
 
   # Callbacks
   after_save :save_order_articles, :update_price_of_group_orders
+  before_validation :distribute_transport
 
   # Finders
   scope :started, -> { where('starts <= ?', Time.now) }
@@ -258,7 +260,7 @@ class Order < ApplicationRecord
     transaction do                                        # Start updating account balances
       for group_order in gos
         if group_order.ordergroup
-          price = group_order.price * -1                  # decrease! account balance
+          price = group_order.total * -1                  # decrease! account balance
           group_order.ordergroup.add_financial_transaction!(price, transaction_note, user, transaction_type, nil, group_order)
         end
       end
@@ -347,6 +349,27 @@ class Order < ApplicationRecord
 
   private
 
+  def distribute_transport
+    return unless group_orders.any?
+    case transport_distribution.try(&:to_i)
+    when Order.transport_distributions[:ordergroup] then
+      amount = transport / group_orders.size
+      group_orders.each do |go|
+        go.transport = amount.ceil(2)
+      end
+    when Order.transport_distributions[:price] then
+      amount = transport / group_orders.sum(:price)
+      group_orders.each do |go|
+        go.transport = (amount * go.price).ceil(2)
+      end
+    when Order.transport_distributions[:articles] then
+      amount = transport / group_orders.includes(:group_order_articles).sum(:result)
+      group_orders.each do |go|
+        go.transport = (amount * go.group_order_articles.sum(:result)).ceil(2)
+      end
+    end
+  end
+
   # Updates the "price" attribute of GroupOrders or GroupOrderResults
   # This will be either the maximum value of a current order or the actual order value of a finished order.
   def update_price_of_group_orders