Create OrderCycleFormApplicator, for interfacing between front-end form and OrderCycle exchanges model.

lib/open_food_web/order_cycle_form_applicator.rb

@@ -0,0 +1,18 @@
+module OpenFoodWeb
+  class OrderCycleFormApplicator
+    def initialize(order_cycle)
+      @order_cycle = order_cycle
+    end
+
+    def go!
+      @order_cycle.incoming_exchanges.each do |exchange|
+        add_exchange(exchange[:enterprise_id], @order_cycle.coordinator_id)
+      end
+    end
+
+    def add_exchange(sender_id, receiver_id)
+      @order_cycle.exchanges.create! :sender_id => sender_id, :receiver_id => receiver_id
+    end
+
+  end
+end

spec/lib/open_food_web/order_cycle_form_applicator.rb

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+require 'open_food_web/order_cycle_form_applicator'
+
+module OpenFoodWeb
+  describe OrderCycleFormApplicator do
+    it "creates new exchanges for incoming_exchanges" do
+      coordinator_id = 123
+      supplier_id = 456
+
+      oc = double(:order_cycle, :coordinator_id => coordinator_id, :incoming_exchanges => [{:enterprise_id => supplier_id}])
+
+      applicator = OrderCycleFormApplicator.new(oc)
+
+      applicator.should_receive(:add_exchange).with(supplier_id, coordinator_id)
+
+      applicator.go!
+    end
+  end
+end