[MOM] Implement Elvish Vatkeeper

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

@@ -0,0 +1,66 @@
+package mage.abilities.effects.common;
+
+import mage.abilities.Ability;
+import mage.abilities.Mode;
+import mage.abilities.effects.OneShotEffect;
+import mage.constants.Outcome;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+import mage.target.Target;
+import mage.util.CardUtil;
+
+import java.util.UUID;
+
+/**
+ * @author TheElk801
+ */
+public class TransformTargetEffect extends OneShotEffect {
+
+    public TransformTargetEffect() {
+        super(Outcome.Transform);
+    }
+
+    public TransformTargetEffect(final TransformTargetEffect effect) {
+        super(effect);
+    }
+
+    @Override
+    public TransformTargetEffect copy() {
+        return new TransformTargetEffect(this);
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        for (UUID targetId : getTargetPointer().getTargets(game, source)) {
+            Permanent permanent = game.getPermanent(getTargetPointer().getFirst(game, source));
+            if (permanent != null) {
+                permanent.transform(source, game);
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public String getText(Mode mode) {
+        if (staticText != null && !staticText.isEmpty()) {
+            return staticText;
+        }
+        StringBuilder sb = new StringBuilder("transform ");
+        Target target = mode.getTargets().get(0);
+        if (target.getMaxNumberOfTargets() == Integer.MAX_VALUE
+                && target.getMinNumberOfTargets() == 0) {
+            sb.append("any number of ");
+        } else {
+            if (target.getMaxNumberOfTargets() != target.getNumberOfTargets()) {
+                sb.append("up to ");
+            }
+            sb.append(CardUtil.numberToText(target.getMaxNumberOfTargets())).append(' ');
+        }
+        String targetName = mode.getTargets().get(0).getTargetName();
+        if (!targetName.contains("target ")) {
+            sb.append("target ");
+        }
+        sb.append(targetName);
+        return sb.toString();
+    }
+}