support shroud

2 files changed, 43 insertions, 2 deletions

diff --git a/go/game/cardParsing_test.go b/go/game/cardParsing_test.go
new file mode 100644
index 00000000..2ef7429e
--- /dev/null
+++ b/go/game/cardParsing_test.go
@@ -0,0 +1,31 @@
+package game
+
+import (
+	"errors"
+	"log"
+	"testing"
+)
+
+func TestCloak(t *testing.T) {
+	s := NewLocalState()
+	p := NewMockPlayer()
+	s.SetMap(newEmpty2x2Map())
+	a := s.addNewUnit(NewCard("base/archer"), Position{0, 0}, p)
+	c := s.addNewEquipment(NewCard("equipments/cloak"), Position{1, 0}, p)
+	die := NewCard("magic/die!")
+
+	ea := NewEquipAction(a, c)
+	ea.costFunc = genBaseActionCost(a, 1, 0)
+	s.ResolveAction(ea)
+
+	if !a.HasEffect("shroud") {
+		t.Fatal("archer not shrouded")
+	}
+
+	pa := NewPlayAction(p, die)
+	err := pa.Target().AddSelection(a)
+	log.Println(pa.Target().desc, err)
+	if !errors.Is(err, ErrTargetHasShroud) {
+		t.Fatal("shrouded archer targeted")
+	}
+}
diff --git a/go/game/targets.go b/go/game/targets.go
index 61cf3436..53b8bdcd 100644
--- a/go/game/targets.go
+++ b/go/game/targets.go
@@ -527,8 +527,18 @@ var (
 	cardTargetConstraint      TargetConstraintFunc = typeTargetConstraint[*Card]("*Card")
 )
 
+var ErrTargetHasShroud = errors.New("target has shroud")
+
+func shroudedTargetContraint(t any) (err error) {
+	p := t.(Permanent)
+	if p.HasEffect("shroud") {
+		err = ErrTargetHasShroud
+	}
+	return
+}
+
 func parsePermanentTargetConstraint(desc string, s *LocalState, action Action) []TargetConstraintFunc {
-	constraints := []TargetConstraintFunc{permanentTargetConstraint}
+	constraints := []TargetConstraintFunc{permanentTargetConstraint, shroudedTargetContraint}
 
 	if strings.Contains(desc, "enemy permanent") {
 		constraints = append(constraints, enemyPermanentTargetConstraint(action))
@@ -551,7 +561,7 @@ func parsePermanentTargetConstraint(desc string, s *LocalState, action Action) [
 }
 
 func parseUnitTargetConstraint(desc string, _ *LocalState, action Action) []TargetConstraintFunc {
-	constraints := []TargetConstraintFunc{unitTargetConstraint}
+	constraints := []TargetConstraintFunc{unitTargetConstraint, shroudedTargetContraint}
 
 	if strings.Contains(desc, "enemy unit") {
 		constraints = append(constraints, enemyPermanentTargetConstraint(action))