web: support first-visit undo when player 2 throws first

1 files changed, 14 insertions, 2 deletions

diff --git a/web/web_control.c b/web/web_control.c
index fac1d8b..39b92ba 100644
--- a/web/web_control.c
+++ b/web/web_control.c
@@ -230,10 +230,22 @@ static void undo_active()
 	state->active_leg = state->legs[state->active_player - 1];
 }
 
+static bool first_user_has_thrown() {
+	for (int i = 0, np = num_players(); i < np; ++i) {
+		int pn = match_opts->throws_first + i;
+		if (pn > np)
+			pn -= np;
+
+		if (!player_is_comp(pn))
+			return !!state->legs[pn - 1]->n_visits;
+	}
+
+	return false;
+}
+
 void user_undo()
 {
-	// FIXME: undo doesn't work for first visit when player 2 throws first
-	if (!state->legs[0]->n_visits) {
+	if (!first_user_has_thrown()) {
 		oi();
 		return;
 	}