Package mage.abilities.effects.common

Source Code of mage.abilities.effects.common.MustBlockSourceEffect

/*
*  Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
*
*  Redistribution and use in source and binary forms, with or without modification, are
*  permitted provided that the following conditions are met:
*
*     1. Redistributions of source code must retain the above copyright notice, this list of
*        conditions and the following disclaimer.
*
*     2. Redistributions in binary form must reproduce the above copyright notice, this list
*        of conditions and the following disclaimer in the documentation and/or other materials
*        provided with the distribution.
*
*  THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
*  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
*  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
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package mage.abilities.effects.common;

import mage.Constants.Duration;
import mage.abilities.Ability;
import mage.abilities.effects.RequirementBlockEffect;
import mage.filter.common.FilterCreaturePermanent;
import mage.game.Game;
import mage.game.combat.CombatGroup;
import mage.game.permanent.Permanent;
import mage.players.Player;

/**
*
* @author BetaSteward_at_googlemail.com
*/
public class MustBlockSourceEffect extends RequirementBlockEffect<MustBlockSourceEffect> {

  public MustBlockSourceEffect() {
    super(Duration.WhileOnBattlefield);
  }

  public MustBlockSourceEffect(final MustBlockSourceEffect effect) {
    super(effect);
  }

  @Override
  public boolean apply(Game game, Ability source) {
    CombatGroup group = game.getCombat().findGroup(source.getSourceId());
    if (group != null) {
      Player defender = null;
      if (group.isDefenderIsPlaneswalker()) {
        Permanent planeswalker = game.getPermanent(group.getDefenderId());
        if (planeswalker != null) {
          defender = game.getPlayer(planeswalker.getControllerId());
        }
      }
      else {
        defender = game.getPlayer(group.getDefenderId());
      }
      if (defender != null) {
        for (Permanent creature: game.getBattlefield().getAllActivePermanents(FilterCreaturePermanent.getDefault(), defender.getId())) {
          if (group.canBlock(creature, game)) {
            group.addBlocker(creature.getId(), creature.getControllerId(), game);
          }
        }
        return true;
      }
    }
    return false;
  }

  @Override
  public MustBlockSourceEffect copy() {
    return new MustBlockSourceEffect(this);
  }

  @Override
  public String getText(Ability source) {
    return "All creatures able to block {this} do so";
  }

}
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