[TDM] Implement Stalwart Successor

Mage.Sets/src/mage/cards/s/StalwartSuccessor.java

@@ -0,0 +1,123 @@
+package mage.cards.s;
+
+import mage.MageInt;
+import mage.MageObjectReference;
+import mage.abilities.TriggeredAbilityImpl;
+import mage.abilities.effects.common.counter.AddCountersTargetEffect;
+import mage.abilities.keyword.MenaceAbility;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+import mage.constants.SubType;
+import mage.constants.WatcherScope;
+import mage.constants.Zone;
+import mage.counters.CounterType;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+import mage.target.targetpointer.FixedTarget;
+import mage.watchers.Watcher;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public final class StalwartSuccessor extends CardImpl {
+
+    public StalwartSuccessor(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{1}{B}{G}");
+
+        this.subtype.add(SubType.HUMAN);
+        this.subtype.add(SubType.WARRIOR);
+        this.power = new MageInt(3);
+        this.toughness = new MageInt(2);
+
+        // Menace
+        this.addAbility(new MenaceAbility());
+
+        // Whenever one or more counters are put on a creature you control, if it's the first time counters have been put on that creature this turn, put a +1/+1 counter on that creature.
+        this.addAbility(new StalwartSuccessorTriggeredAbility());
+    }
+
+    private StalwartSuccessor(final StalwartSuccessor card) {
+        super(card);
+    }
+
+    @Override
+    public StalwartSuccessor copy() {
+        return new StalwartSuccessor(this);
+    }
+}
+
+class StalwartSuccessorTriggeredAbility extends TriggeredAbilityImpl {
+
+    StalwartSuccessorTriggeredAbility() {
+        super(Zone.BATTLEFIELD, new AddCountersTargetEffect(CounterType.P1P1.createInstance()));
+        this.setTriggerPhrase("Whenever one or more counters are put on a creature you control, " +
+                "if it's the first time counters have been put on that creature this turn, ");
+        this.addWatcher(new StalwartSuccessorWatcher());
+    }
+
+    private StalwartSuccessorTriggeredAbility(final StalwartSuccessorTriggeredAbility ability) {
+        super(ability);
+    }
+
+    @Override
+    public StalwartSuccessorTriggeredAbility copy() {
+        return new StalwartSuccessorTriggeredAbility(this);
+    }
+
+    @Override
+    public boolean checkEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.COUNTERS_ADDED;
+    }
+
+    @Override
+    public boolean checkTrigger(GameEvent event, Game game) {
+        Permanent permanent = game.getPermanent(event.getTargetId());
+        if (permanent == null
+                || !permanent.isCreature(game)
+                || !permanent.isControlledBy(getControllerId())
+                || !StalwartSuccessorWatcher.checkCreature(permanent, event, game)) {
+            return false;
+        }
+        this.getEffects().setTargetPointer(new FixedTarget(permanent, game));
+        return true;
+    }
+}
+
+class StalwartSuccessorWatcher extends Watcher {
+
+    private final Map<MageObjectReference, UUID> map = new HashMap<>();
+
+    StalwartSuccessorWatcher() {
+        super(WatcherScope.GAME);
+    }
+
+    @Override
+    public void watch(GameEvent event, Game game) {
+        if (event.getType() == GameEvent.EventType.COUNTERS_ADDED) {
+            map.putIfAbsent(new MageObjectReference(event.getTargetId(), game), event.getId());
+        }
+    }
+
+    @Override
+    public void reset() {
+        super.reset();
+        map.clear();
+    }
+
+    static boolean checkCreature(Permanent permanent, GameEvent event, Game game) {
+        return Objects.equals(
+                event.getId(),
+                game.getState()
+                        .getWatcher(StalwartSuccessorWatcher.class)
+                        .map
+                        .getOrDefault(new MageObjectReference(permanent, game), null)
+        );
+    }
+}

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

@@ -236,6 +236,7 @@ public final class TarkirDragonstorm extends ExpansionSet {
         cards.add(new SetCardInfo("Sonic Shrieker", 226, Rarity.UNCOMMON, mage.cards.s.SonicShrieker.class));
         cards.add(new SetCardInfo("Spectral Denial", 58, Rarity.UNCOMMON, mage.cards.s.SpectralDenial.class));
         cards.add(new SetCardInfo("Stadium Headliner", 122, Rarity.RARE, mage.cards.s.StadiumHeadliner.class));
+        cards.add(new SetCardInfo("Stalwart Successor", 227, Rarity.UNCOMMON, mage.cards.s.StalwartSuccessor.class));
         cards.add(new SetCardInfo("Starry-Eyed Skyrider", 25, Rarity.UNCOMMON, mage.cards.s.StarryEyedSkyrider.class));
         cards.add(new SetCardInfo("Static Snare", 26, Rarity.UNCOMMON, mage.cards.s.StaticSnare.class));
         cards.add(new SetCardInfo("Stillness in Motion", 59, Rarity.RARE, mage.cards.s.StillnessInMotion.class));