# yaml-language-server: $schema=../references/diagram.schema.json
title: Order lifecycle
subtitle: "UML state machine: transitions read event [guard] / action"
kind: state
# Top to bottom: left to right, seven states with long transition labels make a strip.
direction: down
# One port per transition, as UML draws them; a self-transition then keeps the top of its state.
layout: { merge: false, spacing: compact }

nodes:
  start: { shape: initial }
  created: { shape: state, label: Created }
  paid: { shape: state, label: Paid }
  packed: { shape: state, label: Packed }
  shipped: { shape: state, label: Shipped }
  delivered: { shape: state, label: Delivered }
  cancelled: { shape: state, label: Cancelled }
  refunded: { shape: state, label: Refunded }
  end: { shape: final }
  closed: { shape: final }

edges:
  - start -> created
  - created -> paid: "pay [card ok] / charge"
  - created -> created: "edit / recalc total"
  - created -> cancelled: "cancel / release stock"
  - paid -> packed: "pick / print label"
  - paid -> refunded: "cancel [not packed] / refund"
  - packed -> shipped: "hand over / send tracking"
  - shipped -> delivered: "deliver / notify buyer"
  - delivered -> refunded: "return [within 30 days] / refund"
  - delivered -> end
  - cancelled -> closed
  - refunded -> end