DisabledPolicy: a policy that doesn't

koboldsim/cardtypes.go

@@ -398,6 +398,34 @@ func (f *FuncPolicy) Is(p Policy) bool {
 	return ok && (f == fp)
 }
 
+// A DisabledPolicy is never enabled.
+type DisabledPolicy struct {
+	Msg cardsim.Message
+}
+
+func (d *DisabledPolicy) OptionText(p *Player) (cardsim.Message, error) {
+	return d.Msg, nil
+}
+
+func (d *DisabledPolicy) Enact(*Player) (cardsim.Message, error) {
+	return nil, ErrOptionNotEnabled
+}
+
+func (d *DisabledPolicy) Enabled(*Player) bool {
+	return false
+}
+
+func (d *DisabledPolicy) Unenact(*Player) error {
+	return ErrPolicyNotEnacted
+}
+
+func (d *DisabledPolicy) LastEnacted(int, Policy) {}
+
+func (d *DisabledPolicy) Is(p Policy) bool {
+	dp, ok := p.(*DisabledPolicy)
+	return ok && (dp == d)
+}
+
 // ShuffleIntoBottomHalf is a common "what to do with the card after?" behavior.
 func ShuffleIntoBottomHalf(c Card, p *Player, _ CardOption) error {
 	p.Deck.InsertRandomBottom(0.5, c)