nim-codex/codex/purchasing/states/unknown.nim

import ../statemachine
import ./errorhandling
import ./submitted
import ./started
import ./cancelled
import ./finished
import ./failed

type PurchaseUnknown* = ref object of ErrorHandlingState

method `$`*(state: PurchaseUnknown): string =
  "unknown"

method run*(state: PurchaseUnknown, machine: Machine): Future[?State] {.async.} =
  let purchase = Purchase(machine)
  if (request =? await purchase.market.getRequest(purchase.requestId)) and
      (requestState =? await purchase.market.requestState(purchase.requestId)):

    purchase.request = some request

    case requestState
    of RequestState.New:
      return some State(PurchaseSubmitted())
    of RequestState.Started:
      return some State(PurchaseStarted())
    of RequestState.Cancelled:
      return some State(PurchaseCancelled())
    of RequestState.Finished:
      return some State(PurchaseFinished())
    of RequestState.Failed:
      return some State(PurchaseFailed())