forked from External/mage
112 lines
3.7 KiB
Java
112 lines
3.7 KiB
Java
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package mage.abilities.effects;
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import mage.abilities.Ability;
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import mage.abilities.dynamicvalue.DynamicValue;
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import mage.constants.Duration;
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import mage.constants.EffectType;
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import mage.constants.Outcome;
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import mage.game.Game;
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import mage.game.events.DamageEvent;
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import mage.game.events.GameEvent;
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/**
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*
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* @author BetaSteward_at_googlemail.com
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*/
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public abstract class PreventionEffectImpl extends ReplacementEffectImpl implements PreventionEffect {
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protected DynamicValue amountToPreventDynamic;
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protected int amountToPrevent;
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protected final boolean onlyCombat;
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protected boolean consumable;
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public PreventionEffectImpl(Duration duration) {
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this(duration, Integer.MAX_VALUE, false);
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}
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public PreventionEffectImpl(Duration duration, int amountToPrevent, boolean onlyCombat) {
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this(duration, amountToPrevent, onlyCombat, true);
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}
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public PreventionEffectImpl(Duration duration, int amountToPrevent, boolean onlyCombat, boolean consumable) {
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this(duration, amountToPrevent, onlyCombat, consumable, null);
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}
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/**
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*
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* @param duration
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* @param amountToPrevent
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* @param onlyCombat
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* @param consumable
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* @param amountToPreventDynamic if set, on init amountToPrevent is set to
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* calculated value of amountToPreventDynamic
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*/
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public PreventionEffectImpl(Duration duration, int amountToPrevent, boolean onlyCombat, boolean consumable, DynamicValue amountToPreventDynamic) {
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super(duration, Outcome.PreventDamage);
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this.effectType = EffectType.PREVENTION;
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this.amountToPrevent = amountToPrevent;
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this.amountToPreventDynamic = amountToPreventDynamic;
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this.onlyCombat = onlyCombat;
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this.consumable = consumable;
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}
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public PreventionEffectImpl(final PreventionEffectImpl effect) {
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super(effect);
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this.amountToPrevent = effect.amountToPrevent;
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this.amountToPreventDynamic = effect.amountToPreventDynamic;
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this.onlyCombat = effect.onlyCombat;
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this.consumable = effect.consumable;
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}
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@Override
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public void init(Ability source, Game game) {
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super.init(source, game);
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if (amountToPreventDynamic != null) {
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amountToPrevent = amountToPreventDynamic.calculate(game, source, this);
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}
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}
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@Override
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public boolean apply(Game game, Ability source) {
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// not used for prevention effect
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return true;
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}
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protected PreventionEffectData preventDamageAction(GameEvent event, Ability source, Game game) {
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PreventionEffectData preventionData = game.preventDamage(event, source, game, amountToPrevent);
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if (!preventionData.isError() && !preventionData.isReplaced()) {
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if (consumable) {
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amountToPrevent = preventionData.getRemainingAmount();
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}
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if (amountToPrevent == 0) {
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this.discard();
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}
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}
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return preventionData;
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}
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@Override
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public boolean replaceEvent(GameEvent event, Ability source, Game game) {
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preventDamageAction(event, source, game);
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// damage amount is reduced or set to 0 so complete replacement of damage event is never neccessary
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return false;
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}
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@Override
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public boolean checksEventType(GameEvent event, Game game) {
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switch (event.getType()) {
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case DAMAGE_CREATURE:
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case DAMAGE_PLAYER:
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case DAMAGE_PLANESWALKER:
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return true;
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}
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return false;
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}
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@Override
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public boolean applies(GameEvent event, Ability source, Game game) {
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return event.getFlag() && (!onlyCombat || ((DamageEvent) event).isCombatDamage());
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}
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}
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