37 lines
1.2 KiB
Kotlin
37 lines
1.2 KiB
Kotlin
package eventDemo.business.command.action
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import eventDemo.business.command.CommandException
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import eventDemo.business.command.command.ICantPlayCommand
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import eventDemo.business.event.event.PlayerHavePassEvent
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import eventDemo.business.event.projection.GameStateRepository
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/**
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* A command to perform an action to play a new card
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*/
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data class ICantPlay(
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private val gameStateRepository: GameStateRepository,
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) : CommandAction<ICantPlayCommand, PlayerHavePassEvent> {
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override fun run(command: ICantPlayCommand): (version: Int) -> PlayerHavePassEvent {
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val state = gameStateRepository.getLast(command.payload.aggregateId)
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if (state.currentPlayerTurn != command.payload.player) {
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throw CommandException("Its not your turn!")
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}
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val playableCards = state.playableCards(command.payload.player)
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if (playableCards.isNotEmpty()) {
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throw CommandException("You can and must play one card, like ${playableCards.first()::class.simpleName}")
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}
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val takenCard = state.deck.stack.first()
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return { version ->
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PlayerHavePassEvent(
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aggregateId = command.payload.aggregateId,
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player = command.payload.player,
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takenCard = takenCard,
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version = version,
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)
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}
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}
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}
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