[SNC] Implemented Unlucky Witness

Mage.Sets/src/mage/cards/u/UnluckyWitness.java

@@ -0,0 +1,148 @@
+package mage.cards.u;
+
+import mage.MageInt;
+import mage.MageObjectReference;
+import mage.abilities.Ability;
+import mage.abilities.common.DiesSourceTriggeredAbility;
+import mage.abilities.effects.AsThoughEffectImpl;
+import mage.abilities.effects.OneShotEffect;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.cards.Cards;
+import mage.cards.CardsImpl;
+import mage.constants.*;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.stack.Spell;
+import mage.players.Player;
+import mage.util.CardUtil;
+import mage.watchers.Watcher;
+
+import java.util.*;
+
+/**
+ * @author TheElk801
+ */
+public final class UnluckyWitness extends CardImpl {
+
+    public UnluckyWitness(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{R}");
+
+        this.subtype.add(SubType.HUMAN);
+        this.subtype.add(SubType.CITIZEN);
+        this.power = new MageInt(1);
+        this.toughness = new MageInt(1);
+
+        // When Unlucky Witness dies, exile the top two cards of your library. Until your next end step, you may play one of those cards.
+        this.addAbility(new DiesSourceTriggeredAbility(new UnluckyWitnessEffect()));
+    }
+
+    private UnluckyWitness(final UnluckyWitness card) {
+        super(card);
+    }
+
+    @Override
+    public UnluckyWitness copy() {
+        return new UnluckyWitness(this);
+    }
+}
+
+class UnluckyWitnessEffect extends OneShotEffect {
+
+    UnluckyWitnessEffect() {
+        super(Outcome.Benefit);
+        staticText = "exile the top two cards of your library. " +
+                "Until your next end step, you may play one of those cards";
+    }
+
+    private UnluckyWitnessEffect(final UnluckyWitnessEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public UnluckyWitnessEffect copy() {
+        return new UnluckyWitnessEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player player = game.getPlayer(source.getControllerId());
+        if (player == null) {
+            return false;
+        }
+        Cards cards = new CardsImpl(player.getLibrary().getTopCards(game, 2));
+        player.moveCards(cards, Zone.EXILED, source, game);
+        game.addEffect(new UnluckyWitnessPlayEffect(cards, game), source);
+        return true;
+    }
+}
+
+class UnluckyWitnessPlayEffect extends AsThoughEffectImpl {
+
+    private final Set<MageObjectReference> morSet = new HashSet<>();
+
+    UnluckyWitnessPlayEffect(Cards cards, Game game) {
+        super(AsThoughEffectType.PLAY_FROM_NOT_OWN_HAND_ZONE, Duration.UntilYourNextEndStep, Outcome.Benefit);
+        cards.stream()
+                .map(uuid -> new MageObjectReference(uuid, game))
+                .forEach(morSet::add);
+    }
+
+    private UnluckyWitnessPlayEffect(final UnluckyWitnessPlayEffect effect) {
+        super(effect);
+        this.morSet.addAll(effect.morSet);
+    }
+
+    @Override
+    public UnluckyWitnessPlayEffect copy() {
+        return new UnluckyWitnessPlayEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        return true;
+    }
+
+    @Override
+    public boolean applies(UUID sourceId, Ability source, UUID affectedControllerId, Game game) {
+        UUID objectIdToCast = CardUtil.getMainCardId(game, sourceId);
+        return source.isControlledBy(affectedControllerId)
+                && morSet.stream().anyMatch(mor -> mor.refersTo(objectIdToCast, game))
+                && UnluckyWitnessWatcher.checkRef(source, morSet, game);
+    }
+}
+
+class UnluckyWitnessWatcher extends Watcher {
+
+    private final Map<MageObjectReference, Set<MageObjectReference>> morMap = new HashMap<>();
+    private static final Set<MageObjectReference> emptySet = new HashSet<>();
+
+    UnluckyWitnessWatcher() {
+        super(WatcherScope.GAME);
+    }
+
+    @Override
+    public void watch(GameEvent event, Game game) {
+        if (event.getType() != GameEvent.EventType.SPELL_CAST
+                || event.getAdditionalReference() == null) {
+            return;
+        }
+        MageObjectReference mor = event.getAdditionalReference().getApprovingMageObjectReference();
+        Spell spell = game.getSpell(event.getTargetId());
+        if (mor == null || spell == null) {
+            return;
+        }
+        morMap.computeIfAbsent(mor, x -> new HashSet<>())
+                .add(new MageObjectReference(spell.getMainCard(), game, -1));
+    }
+
+    static boolean checkRef(Ability source, Set<MageObjectReference> morSet, Game game) {
+        UnluckyWitnessWatcher watcher = game.getState().getWatcher(UnluckyWitnessWatcher.class);
+        return watcher != null
+                && watcher
+                .morMap
+                .getOrDefault(new MageObjectReference(source.getSourceObject(game), game), emptySet)
+                .stream()
+                .noneMatch(morSet::contains);
+    }
+}

Mage.Sets/src/mage/sets/StreetsOfNewCapenna.java

@@ -83,6 +83,7 @@ public final class StreetsOfNewCapenna extends ExpansionSet {
         cards.add(new SetCardInfo("Strangle", 125, Rarity.COMMON, mage.cards.s.Strangle.class));
         cards.add(new SetCardInfo("Swamp", 266, Rarity.LAND, mage.cards.basiclands.Swamp.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("Tramway Station", 258, Rarity.COMMON, mage.cards.t.TramwayStation.class));
+        cards.add(new SetCardInfo("Unlucky Witness", 128, Rarity.UNCOMMON, mage.cards.u.UnluckyWitness.class));
         cards.add(new SetCardInfo("Urabrask, Heretic Praetor", 129, Rarity.MYTHIC, mage.cards.u.UrabraskHereticPraetor.class));
         cards.add(new SetCardInfo("Vivien on the Hunt", 162, Rarity.MYTHIC, mage.cards.v.VivienOnTheHunt.class));
         cards.add(new SetCardInfo("Waterfront District", 259, Rarity.COMMON, mage.cards.w.WaterfrontDistrict.class));