Implemented Boot Nipper

Mage/src/main/java/mage/abilities/effects/common/counter/AddCounterChoiceSourceEffect.java

@@ -0,0 +1,60 @@
+package mage.abilities.effects.common.counter;
+
+import mage.abilities.Ability;
+import mage.abilities.effects.OneShotEffect;
+import mage.constants.Outcome;
+import mage.counters.Counter;
+import mage.counters.CounterType;
+import mage.game.Game;
+import mage.game.permanent.Permanent;
+import mage.players.Player;
+
+/**
+ * @author TheElk801
+ */
+public class AddCounterChoiceSourceEffect extends OneShotEffect {
+
+    private final CounterType counterType1;
+    private final CounterType counterType2;
+
+    public AddCounterChoiceSourceEffect(CounterType counterType1, CounterType counterType2) {
+        super(Outcome.Benefit);
+        this.counterType1 = counterType1;
+        this.counterType2 = counterType2;
+        staticText = "with your choice of a " + counterType1 + " counter or a " + counterType2 + " counter on it";
+    }
+
+    private AddCounterChoiceSourceEffect(final AddCounterChoiceSourceEffect effect) {
+        super(effect);
+        this.counterType1 = effect.counterType1;
+        this.counterType2 = effect.counterType2;
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        Player player = game.getPlayer(source.getControllerId());
+        Permanent permanent = game.getPermanentEntering(source.getSourceId());
+        if (player == null || permanent == null) {
+            return false;
+        }
+        Counter counter;
+        if (player.chooseUse(
+                Outcome.Neutral, "Choose " + counterType1 + " or " + counterType2, null,
+                cap(counterType1.getName()), cap(counterType2.getName()), source, game
+        )) {
+            counter = counterType1.createInstance();
+        } else {
+            counter = counterType2.createInstance();
+        }
+        return permanent.addCounters(counter, source, game);
+    }
+
+    private static final String cap(String string) {
+        return string != null ? string.substring(0, 1).toUpperCase() + string.substring(1) : null;
+    }
+
+    @Override
+    public AddCounterChoiceSourceEffect copy() {
+        return new AddCounterChoiceSourceEffect(this);
+    }
+}