Updated, improved and cleaned RESTbucks example.

Moved it under "rest" subfolder.

examples/rest/restbucks_CRUD/src/database/shared_restbucks_api.e

@@ -0,0 +1,61 @@
+note
+	description: "Summary description for {SHARED_RESTBUCKS_API}."
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	SHARED_RESTBUCKS_API
+
+feature -- Access: bridget to api
+
+	has_order (a_id: READABLE_STRING_GENERAL): BOOLEAN
+		do
+			Result := api.has_order (a_id)
+		end
+
+	order (a_id: READABLE_STRING_GENERAL): detachable ORDER
+		do
+			Result := api.order (a_id)
+		end
+
+feature -- Element change
+
+	submit_order (a_order: ORDER)
+			-- Submit new order `a_order`.
+		require
+			no_id: not a_order.has_id
+		do
+			api.submit_order (a_order)
+		ensure
+			a_order.has_id
+			a_order.is_submitted
+		end
+
+	update_order (a_order: ORDER)
+			-- Update the order to the repository
+		require
+			a_order.has_id
+		do
+			api.save_order (a_order)
+		ensure
+			a_order_with_id: a_order.has_id
+		end
+
+	delete_order (a_order: ORDER)
+		require
+			a_order_with_id: a_order.has_id
+		do
+			api.delete_order (a_order)
+		end
+
+feature -- Access		
+
+	api: RESTBUCKS_API
+		once
+			create Result.make
+		end
+
+note
+	copyright: "2011-2017, Javier Velilla and others"
+	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
+end