Generated by XState Viz: https://xstate.js.org/viz

machine.js

const machine = Machine({
  id: 'machine',
  type: 'parallel',
  states: {
    order: {
      initial: 'DoesNotExist',
      states: {
        DoesNotExist: {
          on: {
            MB_send_order: 'UNSENT',
          }
        },
        UNSENT: {
          on: {
            immediately_processed: 'QUEUED'
          }
        },
        QUEUED: {
          on: {
            mailgun_started: 'SENDING'
          }
        },
        SENDING: {
          on: {
            mg_fail: 'SEND_FAILURE',
            mg_success_new_order: 'SENT',
            mg_success_revise_order: 'SENT',
            mg_success_cancel_order: 'PENDING_CANCELLATION',

          }
        },
        SEND_FAILURE: {
          type: 'final'
        },
        SENT: {
          on: {
            MB_send_revision: 'QUEUED',
            MB_send_cancel: 'QUEUED',

            PUB_approves: 'ACCEPTED',

          }
        },
        ACCEPTED: {
          on: {
            MB_send_revision: 'QUEUED',
            MB_send_cancel: 'QUEUED',
          }
        },
        PENDING_CANCELLATION: {
          on: {
            PUB_approves: 'CANCELED',
          }
        },
        CANCELED: {
          type: 'final'
        }
      }
    },
    booking: {
      initial: 'UNSENT',
      states: {
        DELETED: {
          type: 'final'
        },
        DRAFT: {
          on: {
            MB_set_not_draft: 'UNSENT',
            MB_delete: 'DELETED'
          }
        },
        UNSENT: {
          on: {
            MB_delete: 'DELETED',
            MB_set_draft: 'DRAFT',
            MB_send_order: 'SENT',
          }
        },
        SENT: {
          on: {
            MB_make_changes: 'REVISED',
            PUB_approves: 'ACCEPTED',
            MB_send_cancel: 'CANCELED',
            mg_fail: 'SEND_FAILURE',
          }
        },
        SEND_FAILURE: {
          type: 'final'
        },
        ACCEPTED: {
          on: {

            MB_make_changes: 'REVISED',
            MB_send_cancel: 'CANCELED',
          }
        },
        REVISED: {
          on: {
            MB_send_revision: 'SENT',
            MB_send_cancel: 'CANCELED',
          }
        },
        CANCELED: {
          type: 'final'
        },
      },
    },
    is_seen_subsystem: {
      initial: 'UNSENT',
      states: {
        UNSENT: {
          on: {
            mg_success: 'SENT_or_PENDING_X',
          }
        },
        SENT_or_PENDING_X: {
          on: {
            PUB_opens_email: 'SEEN',
            PUB_approves: 'ACCEPTED',
          }
        },
        SEEN: {
          on: {
            PUB_approves: 'ACCEPTED',
          }
        },
        ACCEPTED: {
          type: 'final'
        },
      }
    }
  }
});