result states

pkg/shared/games/index.ts

@@ -1,10 +1,11 @@
 import simple from "./simple";
 
 export type Game<
-	S = unknown,
-	A = unknown,
-	E extends { error: any } = { error: any },
-	V = unknown
+	S = unknown, // state
+	A = unknown, // action
+	E extends { error: any } = { error: any }, // error
+	V = unknown, // view
+	R = unknown // results
 > = {
 	title: string;
 	rules: string;
@@ -12,6 +13,7 @@ export type Game<
 	resolveAction: (p: { state: S; action: A; humanKey: string }) => S | E;
 	getView: (p: { state: S; humanKey: string }) => V;
 	resolveQuit: (p: { state: S; humanKey: string }) => S;
+	getResult: (state: S) => R | undefined;
 };
 
 export const GAMES: {

pkg/shared/games/simple.ts

@@ -101,6 +101,8 @@ export const resolveSimpleAction = ({
 	}
 };
 
+export type SimpleResult = string;
+
 type SimpleError = { error: "whoops!" };
 
 export default (config: SimpleConfiguration) =>
@@ -112,9 +114,14 @@ export default (config: SimpleConfiguration) =>
 		getView: ({ state, humanKey }) =>
 			getSimplePlayerView(config, state, humanKey),
 		resolveQuit: () => null,
+		getResult: (state) =>
+			Object.entries(state.playerHands).find(
+				([_, hand]) => hand.length === 2
+			)?.[0],
 	} satisfies Game<
 		SimpleGameState,
 		SimpleAction,
 		SimpleError,
-		SimplePlayerView
+		SimplePlayerView,
+		SimpleResult
 	>);

pkg/shared/kefirs.ts

@@ -50,3 +50,5 @@ export const setDiff = <T>(
 });
 
 export const set = <T>(arr: T[]) => new Set<T>(arr);
+
+export const invert = <E>(obs: Observable<boolean, E>) => obs.map((o) => !o);