[utils] Add AsyncState to state machine
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import pkg/questionable
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import pkg/chronos
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import ./optionalcast
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## Implementation of the the state pattern:
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@ -84,3 +85,18 @@ proc switch*(machine: StateMachine, newState: State) =
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proc switch*(oldState, newState: State) =
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if context =? oldState.context:
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context.switch(newState)
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type
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AsyncState* = ref object of State
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method enterAsync(state: AsyncState) {.base, async.} =
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discard
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method exitAsync(state: AsyncState) {.base, async.} =
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discard
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method enter(state: AsyncState) =
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asyncSpawn state.enterAsync()
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method exit(state: AsyncState) =
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asyncSpawn state.exitAsync()
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