boardgame-core/src/samples/slay-the-spire-like/system/combat/triggers.ts

import {createMiddlewareChain} from "../utils/middleware";
import {CombatGameContext} from "./types";

export type Triggers = {
    onTurnStart: { entityKey: "player" | string, },
    onTurnEnd: { entityKey: "player" | string, },
    onShuffle: { entityKey: "player" | string, },
    onCardPlayed: { cardId: string,  },
    onCardDiscarded: { cardId: string,  },
    onCardDrawn: { cardId: string,  },
    onEffectApplied: { effectId: string, entityKey: "player" | string, stacks: number, },
}

export function createTriggers(){
    return {
        onTurnStart: createTrigger("onTurnStart"),
        onTurnEnd: createTrigger("onTurnEnd"),
        onShuffle: createTrigger("onShuffle"),
        onCardPlayed: createTrigger("onCardPlayed"),
        onCardDiscarded: createTrigger("onCardDiscarded"),
        onCardDrawn: createTrigger("onCardDrawn"),
        onEffectApplied: createTrigger("onEffectApplied"),
    }
}

export function createTrigger<TKey extends keyof Triggers>(event: TKey) {
    type Ctx = Triggers[TKey] & { event: TKey, game: CombatGameContext };
    return createMiddlewareChain<Ctx>();
}