[J25] Implement Slinza, the Spiked Stampede

Mage/src/main/java/mage/abilities/effects/common/EntersWithCountersControlledEffect.java

@@ -0,0 +1,93 @@
+package mage.abilities.effects.common;
+
+import mage.abilities.Ability;
+import mage.abilities.effects.ReplacementEffectImpl;
+import mage.constants.Duration;
+import mage.constants.Outcome;
+import mage.counters.Counter;
+import mage.filter.FilterPermanent;
+import mage.game.Game;
+import mage.game.events.EntersTheBattlefieldEvent;
+import mage.game.events.GameEvent;
+import mage.game.permanent.Permanent;
+import mage.util.CardUtil;
+
+/**
+ * @author TheElk801
+ */
+public class EntersWithCountersControlledEffect extends ReplacementEffectImpl {
+
+    private final FilterPermanent filter;
+    private final Counter counter;
+    private final boolean excludeSource;
+
+    public EntersWithCountersControlledEffect(FilterPermanent filter, Counter counter, boolean excludeSource) {
+        this(Duration.WhileOnBattlefield, filter, counter, excludeSource);
+    }
+
+    public EntersWithCountersControlledEffect(Duration duration, FilterPermanent filter, Counter counter, boolean excludeSource) {
+        super(duration, Outcome.BoostCreature);
+        this.filter = filter;
+        this.counter = counter;
+        this.excludeSource = excludeSource;
+        staticText = makeText();
+    }
+
+    private EntersWithCountersControlledEffect(final EntersWithCountersControlledEffect effect) {
+        super(effect);
+        this.filter = effect.filter.copy();
+        this.counter = effect.counter.copy();
+        this.excludeSource = effect.excludeSource;
+    }
+
+    @Override
+    public boolean checksEventType(GameEvent event, Game game) {
+        return event.getType() == GameEvent.EventType.ENTERS_THE_BATTLEFIELD;
+    }
+
+    @Override
+    public boolean applies(GameEvent event, Ability source, Game game) {
+        if (excludeSource && event.getTargetId().equals(source.getSourceId())) {
+            return false;
+        }
+        Permanent permanent = ((EntersTheBattlefieldEvent) event).getTarget();
+        return permanent != null
+                && permanent.isControlledBy(source.getControllerId())
+                && filter.match(permanent, source.getControllerId(), source, game);
+    }
+
+    @Override
+    public boolean replaceEvent(GameEvent event, Ability source, Game game) {
+        Permanent creature = ((EntersTheBattlefieldEvent) event).getTarget();
+        if (creature != null) {
+            creature.addCounters(counter, source.getControllerId(), source, game, event.getAppliedEffects());
+        }
+        return false;
+    }
+
+    private String makeText() {
+        StringBuilder sb = new StringBuilder();
+        if (duration == Duration.EndOfTurn) {
+            sb.append("this turn, ");
+        }
+        sb.append("each ");
+        if (excludeSource) {
+            sb.append("other ");
+        }
+        sb.append(filter.getMessage());
+        sb.append(" you control enters with ");
+        sb.append(CardUtil.numberToText(counter.getCount(), "an"));
+        sb.append(" additional ");
+        sb.append(counter.getName());
+        if (counter.getCount() > 1) {
+            sb.append('s');
+        }
+        sb.append(" on it");
+        return sb.toString();
+    }
+
+    @Override
+    public EntersWithCountersControlledEffect copy() {
+        return new EntersWithCountersControlledEffect(this);
+    }
+}