From 301d8ae161634259edfe212aa2c8c7e8f1344e9f Mon Sep 17 00:00:00 2001
From: Kistaro Windrider <kistaro@gmail.com>
Date: Tue, 4 Apr 2023 20:20:43 -0700
Subject: [PATCH] Hide unavailable options on SwitchingCard.

---
 koboldsim/cardtypes.go | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/koboldsim/cardtypes.go b/koboldsim/cardtypes.go
index e20d151..d2b04d0 100644
--- a/koboldsim/cardtypes.go
+++ b/koboldsim/cardtypes.go
@@ -48,6 +48,11 @@ type SwitchingCard struct {
 	After      func(Card, *Player, CardOption) error
 	Policies   []Policy
 	lastPolicy Policy
+
+	// ShowUnavailable controls whether options for which Enabled() = false
+	// should be presented to the player at all. Indexes for "last enacted"
+	// still refer to the original list, not the shortened one.
+	ShowUnavailable bool
 }
 
 // Title implements Card.
@@ -71,7 +76,7 @@ func (s *SwitchingCard) EventText(*Player) (cardsim.Message, error) {
 }
 
 // Options implements Card.
-func (s *SwitchingCard) Options(*Player) ([]CardOption, error) {
+func (s *SwitchingCard) Options(player *Player) ([]CardOption, error) {
 	lastIdx := -1
 	for i, p := range s.Policies {
 		if p.Is(s.lastPolicy) {
@@ -79,10 +84,12 @@ func (s *SwitchingCard) Options(*Player) ([]CardOption, error) {
 			break
 		}
 	}
-	ret := make([]CardOption, len(s.Policies))
-	for i, p := range s.Policies {
+	ret := make([]CardOption, 0, len(s.Policies))
+	for _, p := range s.Policies {
 		p.LastEnacted(lastIdx, s.lastPolicy)
-		ret[i] = p
+		if s.ShowUnavailable || p.Enabled(player) {
+			ret = append(ret, p)
+		}
 	}
 	return ret, nil
 }