The merge method description:

merge( delivery_list )

context: main_delivery – has to be included in the delivery_list too

returns: newly created merged delivery

functionality:

• does sanity checks (check if deliveries have the same portal type, etc.) – if fail return an error
• check existence of simulation movements
• if no simulation movements:
  • create a temporary applied rule
  • add temporary simulation movements based on delivery lines
  • do merge by using the builder on a main delivery
• if simulation movements exists:
  • in case of deliveries without orders:
    • move movements to main delivery's applied rule
    • rebuild with delivery builder
  • in case of deliveries with orders:
    • group chosen movements into the main delivery group
    • rebuild with delivery builder
• cancel old deliveries