[ECL] Implement Wary Farmer (#14197)

Mage.Sets/src/mage/cards/w/WaryFarmer.java

@@ -0,0 +1,110 @@
+package mage.cards.w;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import mage.MageInt;
+import mage.MageObjectReference;
+import mage.abilities.Ability;
+import mage.abilities.condition.Condition;
+import mage.abilities.effects.keyword.SurveilEffect;
+import mage.abilities.triggers.BeginningOfEndStepTriggeredAbility;
+import mage.constants.SubType;
+import mage.constants.WatcherScope;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+import mage.watchers.Watcher;
+import mage.cards.CardImpl;
+import mage.cards.CardSetInfo;
+import mage.constants.CardType;
+
+/**
+ *
+ * @author muz
+ */
+public final class WaryFarmer extends CardImpl {
+
+    public WaryFarmer(UUID ownerId, CardSetInfo setInfo) {
+        super(ownerId, setInfo, new CardType[]{CardType.CREATURE}, "{1}{G/W}{G/W}");
+
+        this.subtype.add(SubType.KITHKIN);
+        this.subtype.add(SubType.CITIZEN);
+        this.power = new MageInt(3);
+        this.toughness = new MageInt(3);
+
+        // At the beginning of your end step, if another creature entered the battlefield under your control this turn, surveil 1.
+        this.addAbility(
+            new BeginningOfEndStepTriggeredAbility(
+                new SurveilEffect(1)
+            ).withInterveningIf(WaryFarmerCondition.instance),
+            new WaryFarmerWatcher()
+        );
+    }
+
+    private WaryFarmer(final WaryFarmer card) {
+        super(card);
+    }
+
+    @Override
+    public WaryFarmer copy() {
+        return new WaryFarmer(this);
+    }
+}
+
+enum WaryFarmerCondition implements Condition {
+    instance;
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        return WaryFarmerWatcher.checkPermanent(game, source);
+    }
+
+    @Override
+    public String toString() {
+        return "another creature entered the battlefield under your control this turn";
+    }
+}
+
+class WaryFarmerWatcher extends Watcher {
+
+    // Key: Player id
+    // Value: set of all creatures that entered under that player's control this turn
+    private final Map<UUID, Set<MageObjectReference>> map = new HashMap<>();
+
+    WaryFarmerWatcher() {
+        super(WatcherScope.GAME);
+    }
+
+    @Override
+    public void watch(GameEvent event, Game game) {
+        if (event.getType() != GameEvent.EventType.ENTERS_THE_BATTLEFIELD) {
+            return;
+        }
+        Permanent permanent = game.getPermanent(event.getTargetId());
+        if (permanent != null) {
+            map.computeIfAbsent(permanent.getControllerId(), x -> new HashSet<>())
+                    .add(new MageObjectReference(permanent, game));
+        }
+
+    }
+
+    @Override
+    public void reset() {
+        map.clear();
+        super.reset();
+    }
+
+    static boolean checkPermanent(Game game, Ability source) {
+        return game
+                .getState()
+                .getWatcher(WaryFarmerWatcher.class)
+                .map
+                .getOrDefault(source.getControllerId(), Collections.emptySet())
+                .stream()
+                .anyMatch(mor -> !mor.refersTo(source, game));
+    }
+}

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

@@ -264,6 +264,7 @@ public final class LorwynEclipsed extends ExpansionSet {
         cards.add(new SetCardInfo("Wanderbrine Preacher", 41, Rarity.COMMON, mage.cards.w.WanderbrinePreacher.class));
         cards.add(new SetCardInfo("Wanderwine Distracter", 82, Rarity.COMMON, mage.cards.w.WanderwineDistracter.class));
         cards.add(new SetCardInfo("Warren Torchmaster", 163, Rarity.UNCOMMON, mage.cards.w.WarrenTorchmaster.class));
+        cards.add(new SetCardInfo("Wary Farmer", 251, Rarity.COMMON, mage.cards.w.WaryFarmer.class));
         cards.add(new SetCardInfo("Wild Unraveling", 84, Rarity.COMMON, mage.cards.w.WildUnraveling.class));
         cards.add(new SetCardInfo("Wistfulness", 252, Rarity.MYTHIC, mage.cards.w.Wistfulness.class, NON_FULL_USE_VARIOUS));
         cards.add(new SetCardInfo("Wistfulness", 296, Rarity.MYTHIC, mage.cards.w.Wistfulness.class, NON_FULL_USE_VARIOUS));