[MOM] Implement Ozolith, the Shattered Spine

Mage/src/main/java/mage/abilities/effects/common/replacement/ModifyCountersAddedEffect.java

@@ -0,0 +1,69 @@
+package mage.abilities.effects.common.replacement;
+
+import mage.abilities.Ability;
+import mage.abilities.effects.ReplacementEffectImpl;
+import mage.constants.Duration;
+import mage.constants.Outcome;
+import mage.counters.CounterType;
+import mage.filter.FilterPermanent;
+import mage.game.Game;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+import mage.util.CardUtil;
+
+/**
+ * @author TheElk801
+ */
+public class ModifyCountersAddedEffect extends ReplacementEffectImpl {
+
+    private final FilterPermanent filter;
+    private final CounterType counterType;
+
+    public ModifyCountersAddedEffect(FilterPermanent filter, CounterType counterType) {
+        super(Duration.WhileOnBattlefield, Outcome.BoostCreature, false);
+        this.filter = filter;
+        this.counterType = counterType;
+        staticText = "if one or more " + (counterType != null ? counterType + " " : "") + "counters would be put on " +
+                CardUtil.addArticle(filter.getMessage()) + " you control, that many plus one " +
+                (counterType != null ? counterType : "of each of those kinds of") + " counters are put on it instead";
+    }
+
+    private ModifyCountersAddedEffect(final ModifyCountersAddedEffect effect) {
+        super(effect);
+        this.filter = effect.filter;
+        this.counterType = effect.counterType;
+    }
+
+    @Override
+    public boolean replaceEvent(GameEvent event, Ability source, Game game) {
+        event.setAmountForCounters(event.getAmount() + 1, true);
+        return false;
+    }
+
+    @Override
+    public boolean checksEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.ADD_COUNTERS;
+    }
+
+    @Override
+    public boolean applies(GameEvent event, Ability source, Game game) {
+        if ((counterType != null && !event.getData().equals(counterType.getName())) || event.getAmount() <= 0) {
+            return false;
+        }
+        Permanent permanent = game.getPermanent(event.getTargetId());
+        if (permanent == null) {
+            permanent = game.getPermanentEntering(event.getTargetId());
+        }
+        return permanent != null && filter.match(permanent, source.getControllerId(), source, game);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        return true;
+    }
+
+    @Override
+    public ModifyCountersAddedEffect copy() {
+        return new ModifyCountersAddedEffect(this);
+    }
+}