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[utils] Add AsyncState to state machine

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Mark Spanbroek 2022-09-27 16:36:20 +02:00 committed by Eric Mastro
parent b52d291785
commit 7841a9692c
1 changed files with 16 additions and 0 deletions
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16
codex/utils/statemachine.nim
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@ -1,4 +1,5 @@
import pkg/questionable import pkg/questionable
import pkg/chronos
import ./optionalcast import ./optionalcast
## Implementation of the the state pattern: ## Implementation of the the state pattern:
@ -84,3 +85,18 @@ proc switch*(machine: StateMachine, newState: State) =
proc switch*(oldState, newState: State) = proc switch*(oldState, newState: State) =
if context =? oldState.context: if context =? oldState.context:
context.switch(newState) context.switch(newState)
type
AsyncState* = ref object of State
method enterAsync(state: AsyncState) {.base, async.} =
discard
method exitAsync(state: AsyncState) {.base, async.} =
discard
method enter(state: AsyncState) =
asyncSpawn state.enterAsync()
method exit(state: AsyncState) =
asyncSpawn state.exitAsync()