Refactor damage with power effect, added checking for wrong targets;

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

@@ -0,0 +1,73 @@
+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.players.Player;
+
+/**
+ * @author JayDi85
+ */
+public class DamageWithPowerFromOneToAnotherTargetEffect extends OneShotEffect {
+
+    String firstTargetName;
+
+    public DamageWithPowerFromOneToAnotherTargetEffect() {
+        this((String) null);
+    }
+
+    public DamageWithPowerFromOneToAnotherTargetEffect(String firstTargetName) {
+        super(Outcome.Damage);
+        this.firstTargetName = firstTargetName;
+    }
+
+    public DamageWithPowerFromOneToAnotherTargetEffect(final DamageWithPowerFromOneToAnotherTargetEffect effect) {
+        super(effect);
+        this.firstTargetName = effect.firstTargetName;
+    }
+
+    @Override
+    public boolean apply(Game game, Ability source) {
+        if (source.getTargets().size() != 2) {
+            throw new IllegalStateException("It must have two targets, but found " + source.getTargets().size());
+        }
+
+        Permanent myPermanent = game.getPermanentOrLKIBattlefield(getTargetPointer().getFirst(game, source));
+        Permanent anotherPermanent = game.getPermanent(source.getTargets().get(1).getFirstTarget());
+        Player anotherPlayer = game.getPlayer(source.getTargets().get(1).getFirstTarget());
+
+        if (myPermanent != null && anotherPermanent != null) {
+            anotherPermanent.damage(myPermanent.getPower().getValue(), myPermanent.getId(), game, false, true);
+            return true;
+        } else if (myPermanent != null && anotherPlayer != null) {
+            anotherPlayer.damage(myPermanent.getPower().getValue(), myPermanent.getId(), game, false, true);
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public DamageWithPowerFromOneToAnotherTargetEffect copy() {
+        return new DamageWithPowerFromOneToAnotherTargetEffect(this);
+    }
+
+    @Override
+    public String getText(Mode mode) {
+        if (staticText != null && !staticText.isEmpty()) {
+            return staticText;
+        }
+
+        if (mode.getTargets().size() != 2) {
+            throw new IllegalStateException("It must have two targets, but found " + mode.getTargets().size());
+        }
+
+        // Target creature you control deals damage equal to its power to target creature you don't control
+        String sb = (this.firstTargetName != null ? this.firstTargetName : "Target " + mode.getTargets().get(0).getTargetName()) +
+                " deals damage equal to its power to target " +
+                mode.getTargets().get(1).getTargetName();
+        return sb;
+    }
+}