+ }))
+}
+
+/// When available, make plays that grant momentum.
+#[must_use]
+pub fn momentum_player(mut fallback: Player) -> Player {
+ Player(Box::new(move |game: &Game| -> Play {
+ if game.phase == Phase::Play {
+ if let Some(suit) = game.discard.top().and_then(Card::suit) {
+ if let Some(card) = game.current_player_hand().filter_by_suit(suit).random() {
+ return Play::Play(*card);
+ }
+ }
+ }
+ fallback.0(game)
+ }))