[DMU] Implement Enlist ability (#9431)

* implement enlist ability

* remove skips for enlist

* [DMU] Implemented Guardian of New Benalia

* add test for enlist

Mage/src/main/java/mage/abilities/keyword/EnlistAbility.java

@@ -1,16 +1,33 @@
 package mage.abilities.keyword;
 
+import mage.abilities.Ability;
 import mage.abilities.StaticAbility;
+import mage.abilities.common.delayed.ReflexiveTriggeredAbility;
+import mage.abilities.effects.ReplacementEffectImpl;
+import mage.abilities.effects.common.continuous.BoostSourceEffect;
+import mage.constants.Duration;
+import mage.constants.Outcome;
 import mage.constants.Zone;
+import mage.filter.FilterPermanent;
+import mage.filter.common.FilterControlledCreaturePermanent;
+import mage.filter.predicate.Predicates;
+import mage.filter.predicate.mageobject.AnotherPredicate;
+import mage.filter.predicate.permanent.AttackingPredicate;
+import mage.filter.predicate.permanent.SummoningSicknessPredicate;
+import mage.filter.predicate.permanent.TappedPredicate;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+import mage.players.Player;
+import mage.target.TargetPermanent;
 
 /**
  * @author TheElk801
- * TODO: Implement this
  */
 public class EnlistAbility extends StaticAbility {
 
     public EnlistAbility() {
-        super(Zone.BATTLEFIELD, null);
+        super(Zone.BATTLEFIELD, new EnlistEffect());
     }
 
     private EnlistAbility(final EnlistAbility ability) {
@@ -28,3 +45,74 @@ public class EnlistAbility extends StaticAbility {
                 "without summoning sickness. When you do, add its power to this creature's until end of turn.)</i>";
     }
 }
+
+class EnlistEffect extends ReplacementEffectImpl {
+
+    private static final FilterPermanent filter = new FilterControlledCreaturePermanent(
+            "another untapped nonattacking creature you control without summoning sickness"
+    );
+
+    static {
+        filter.add(AnotherPredicate.instance);
+        filter.add(TappedPredicate.UNTAPPED);
+        filter.add(Predicates.not(SummoningSicknessPredicate.instance));
+        filter.add(Predicates.not(AttackingPredicate.instance));
+    }
+
+    public EnlistEffect() {
+        super(Duration.WhileOnBattlefield, Outcome.Detriment);
+    }
+
+    public EnlistEffect(EnlistEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public boolean checksEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.ATTACKER_DECLARED;
+    }
+
+    @Override
+    public boolean applies(GameEvent event, Ability source, Game game) {
+        return event.getSourceId().equals(source.getSourceId());
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        return false;
+    }
+
+    @Override
+    public boolean replaceEvent(GameEvent event, Ability source, Game game) {
+        Permanent creature = game.getPermanent(event.getSourceId());
+        Player controller = game.getPlayer(source.getControllerId());
+        if (creature == null || controller == null
+                || !game.getBattlefield().contains(filter, source, game, 1)
+                || !controller.chooseUse(outcome, "Enlist a creature for " + creature.getLogName() + '?', source, game)) {
+            return false;
+        }
+        TargetPermanent target = new TargetPermanent(filter);
+        target.setNotTarget(true);
+        controller.choose(outcome, target, source, game);
+        Permanent permanent = game.getPermanent(target.getFirstTarget());
+        if (permanent == null || !permanent.tap(source, game)) {
+            return false;
+        }
+        game.fireReflexiveTriggeredAbility(new ReflexiveTriggeredAbility(
+                new BoostSourceEffect(
+                        permanent.getPower().getValue(),
+                        0, Duration.EndOfTurn
+                ), false
+        ), source);
+        game.fireEvent(GameEvent.getEvent(
+                GameEvent.EventType.CREATURE_ENLISTED,
+                permanent.getId(), source, source.getControllerId()
+        ));
+        return false;
+    }
+
+    @Override
+    public EnlistEffect copy() {
+        return new EnlistEffect(this);
+    }
+}

Mage/src/main/java/mage/filter/predicate/permanent/SummoningSicknessPredicate.java

@@ -5,10 +5,10 @@ import mage.game.Game;
 import mage.game.permanent.Permanent;
 
 /**
- *
  * @author LevelX2
  */
-public class SummoningSicknessPredicate implements Predicate<Permanent> {
+public enum SummoningSicknessPredicate implements Predicate<Permanent> {
+    instance;
 
     @Override
     public boolean apply(Permanent input, Game game) {

Mage/src/main/java/mage/game/events/GameEvent.java

@@ -354,6 +354,14 @@ public class GameEvent implements Serializable {
         BECOMES_EXERTED,
         BECOMES_RENOWNED,
         GAINS_CLASS_LEVEL,
+        /* CREATURE_ENLISTED
+         targetId    id of the enlisted creature
+         sourceId    id of the creature that enlisted
+         playerId    player who controls the creatures
+         amount      not used for this event
+         flag        not used for this event
+         */
+        CREATURE_ENLISTED,
         /* BECOMES_MONARCH
          targetId    playerId of the player that becomes the monarch
          sourceId    id of the source object that created that effect, if no effect exist it's null