Electroblob77
240 lines
10 KiB
Java
240 lines
10 KiB
Java
package electroblob.wizardry.util;
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import electroblob.wizardry.Wizardry;
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import electroblob.wizardry.data.WizardData;
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import electroblob.wizardry.registry.WizardryPotions;
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import electroblob.wizardry.spell.MindControl;
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import net.minecraft.entity.*;
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import net.minecraft.entity.player.EntityPlayer;
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import net.minecraft.nbt.NBTTagCompound;
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import net.minecraftforge.common.util.FakePlayer;
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import net.minecraftforge.event.entity.living.LivingAttackEvent;
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import net.minecraftforge.fml.common.Mod;
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import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
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/**
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* Contains some useful static methods for interacting with the ally designation system. Also handles the friendly fire
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* setting. This was split off from {@link WizardryUtilities} as of wizardry 4.2 in an effort to make the code easier to
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* navigate.
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*/
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@Mod.EventBusSubscriber
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public final class AllyDesignationSystem {
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private AllyDesignationSystem(){} // No instances!
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/** Set of constants for each of the four friendly fire settings. */
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public enum FriendlyFire {
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ALL("All", false, false),
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ONLY_PLAYERS("Only players", false, true),
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ONLY_OWNED("Only summoned/tamed creatures", true, false),
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NONE("None", true, true);
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/** Constant array storing the names of each of the constants, in the order they are declared. */
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public static final String[] names;
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static {
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names = new String[values().length];
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for(FriendlyFire setting : values()){
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names[setting.ordinal()] = setting.name;
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}
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}
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/** The readable name for this friendly fire setting that will be displayed on the button in the config GUI. */
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public final String name;
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public final boolean blockPlayers;
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public final boolean blockOwned;
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FriendlyFire(String name, boolean blockPlayers, boolean blockOwned){
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this.name = name;
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this.blockPlayers = blockPlayers;
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this.blockOwned = blockOwned;
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}
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/**
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* Gets a friendly fire setting from its string name (ignoring case), or ALL if the given name is not a valid
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* setting.
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*/
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public static FriendlyFire fromName(String name){
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for(FriendlyFire setting : values()){
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if(setting.name.equalsIgnoreCase(name)) return setting;
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}
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Wizardry.logger.info("Invalid string for the friendly fire setting. Using default (all) instead.");
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return ALL;
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}
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}
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/**
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* Returns whether the given target can be attacked by the given attacker. It is up to the caller of this method to
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* work out what this means; it doesn't necessarily mean the target is completely immune (for example, revenge
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* targeting might reasonably bypass this). This method is intended for use where the damage is indirect and/or
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* unavoidable; direct attacks should not check this method. Currently this means the following situations check
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* this method:
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* <p></p>
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* - AI targeting for summoned creatures<br>
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* - AI targeting for mind-controlled creatures<br>
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* - Constructs with an area of effect<br>
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* - Instantaneous spells with an area of effect around the caster (e.g. forest's curse, thunderstorm)<br>
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* - Any lightning chaining effects<br>
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* - Any projectiles which seek targets
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* <p></p>
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* Also note that the friendly fire option is dealt with in the event handler. This method acts as a sort of wrapper
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* for all the AllyDesignationSystem stuff in {@link WizardData}; more details about the ally designation system can be found there.
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*
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* @param attacker The entity that cast the spell originally
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* @param target The entity being attacked
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*
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* @return False under any of the following circumstances, true otherwise:
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* <p></p>
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* - The target is null
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* <p></p>
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* - The target is the attacker (this isn't as stupid as it sounds - anything with an AoE might cause this
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* to be true, as can summoned creatures)
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* <p></p>
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* - The target and the attacker are both players and the target is an ally of the attacker (but the
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* attacker need not be an ally of the target)
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* <p></p>
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* - The target is a creature that was summoned/controlled by the attacker or by an ally of the attacker.
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* <p></p>
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* - The target is a creature that was tamed by the attacker or by an ally of the attacker
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* (see {@link net.minecraft.entity.IEntityOwnable}).
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* <p></p>
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* <i>As of wizardry 4.1.2, this method now returns <b>true</b> instead of false if the attacker is null. This
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* is because in the vast majority of cases, it makes more sense this way: if a construct has no caster, it
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* should affect all entities; if a minion has no caster it should target all entities; etc.</i>
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*/
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public static boolean isValidTarget(Entity attacker, Entity target){
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// Always return false if the target is null
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if(target == null) return false;
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// Always return true if the attacker is null - this must be after the target null check!
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if(attacker == null) return true;
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// Tests whether the target is the attacker
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if(target == attacker) return false;
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// I really shouldn't need to do this, but fake players seem to break stuff...
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if(target instanceof FakePlayer) return false;
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// Use a positive check for these rather than a negative check for monsters, because we only want mobs
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// that are definitely passive
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if(Wizardry.settings.passiveMobsAreAllies && (target.isCreatureType(EnumCreatureType.AMBIENT, false)
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|| target.isCreatureType(EnumCreatureType.CREATURE, false)
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|| target.isCreatureType(EnumCreatureType.WATER_CREATURE, false))){
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return false;
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}
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// Tests whether the target is a creature that was summoned by the attacker
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// if(target instanceof ISummonedCreature && ((ISummonedCreature)target).getCaster() == attacker){
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// return false;
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// }
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// Tests whether the target is a creature that was summoned/tamed (or is otherwise owned) by the attacker
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if(target instanceof IEntityOwnable && ((IEntityOwnable)target).getOwner() == attacker){
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return false;
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}
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// Tests whether the target is a creature that was mind controlled by the attacker
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if(target instanceof EntityLiving && ((EntityLivingBase)target).isPotionActive(WizardryPotions.mind_control)){
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NBTTagCompound entityNBT = target.getEntityData();
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if(entityNBT != null && entityNBT.hasUniqueId(MindControl.NBT_KEY)){
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if(attacker == WizardryUtilities.getEntityByUUID(target.world,
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entityNBT.getUniqueId(MindControl.NBT_KEY))){
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return false;
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}
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}
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}
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// Ally section
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if(attacker instanceof EntityPlayer && WizardData.get((EntityPlayer)attacker) != null){
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if(target instanceof EntityPlayer){
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// Tests whether the target is an ally of the attacker
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if(WizardData.get((EntityPlayer)attacker).isPlayerAlly((EntityPlayer)target)){
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return false;
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}
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// }else if(target instanceof ISummonedCreature){
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// // Tests whether the target is a creature that was summoned by an ally of the attacker
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// if(((ISummonedCreature)target).getCaster() instanceof EntityPlayer && WizardData.get((EntityPlayer)attacker)
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// .isPlayerAlly((EntityPlayer)((ISummonedCreature)target).getCaster())){
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// return false;
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// }
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}else if(target instanceof IEntityOwnable){
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// Tests whether the target is a creature that was summoned/tamed by an ally of the attacker
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if(isOwnerAlly((EntityPlayer)attacker, (IEntityOwnable)target)) return false;
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}else if(target instanceof EntityLiving && ((EntityLivingBase)target).isPotionActive(WizardryPotions.mind_control)){
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// Tests whether the target is a creature that was mind controlled by an ally of the attacker
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NBTTagCompound entityNBT = target.getEntityData();
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if(entityNBT != null && entityNBT.hasKey(MindControl.NBT_KEY)){
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Entity controller = WizardryUtilities.getEntityByUUID(target.world, entityNBT.getUniqueId(MindControl.NBT_KEY));
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if(controller instanceof EntityPlayer && WizardData.get((EntityPlayer)attacker).isPlayerAlly((EntityPlayer)controller)){
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return false;
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}
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}
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}
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}
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return true;
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}
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/** Umbrella method that covers both {@link AllyDesignationSystem#isPlayerAlly(EntityPlayer, EntityPlayer)} and
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* {@link AllyDesignationSystem#isOwnerAlly(EntityPlayer, IEntityOwnable)}, returning true if the given
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* {@link EntityLivingBase} is either owned by the given player, an ally of the given player or owned by an ally
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* of the given player. This is generally used to determine targets for healing or other group buffs. */
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public static boolean isAllied(EntityPlayer allyOf, EntityLivingBase possibleAlly){
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return (possibleAlly instanceof EntityPlayer && isPlayerAlly(allyOf, (EntityPlayer)possibleAlly))
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|| (possibleAlly instanceof IEntityOwnable && (((IEntityOwnable)possibleAlly).getOwner() == allyOf
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|| isOwnerAlly(allyOf, (IEntityOwnable)possibleAlly)));
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}
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/** Helper method for testing if the second player is an ally of the first player. Makes the code neater.
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* @see AllyDesignationSystem#isOwnerAlly(EntityPlayer, IEntityOwnable) */
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public static boolean isPlayerAlly(EntityPlayer allyOf, EntityPlayer possibleAlly){
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WizardData data = WizardData.get(allyOf);
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return data != null && data.isPlayerAlly(possibleAlly);
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}
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/** Helper method for testing if the given {@link net.minecraft.entity.IEntityOwnable}'s owner is an ally of the
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* given player. This works even when the owner is not logged in, though it may not correctly respect teams when
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* that is the case. */
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public static boolean isOwnerAlly(EntityPlayer allyOf, IEntityOwnable ownable){
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WizardData data = WizardData.get(allyOf);
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if(data == null) return false;
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Entity owner = ownable.getOwner();
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return owner instanceof EntityPlayer ? data.isPlayerAlly((EntityPlayer)owner) : data.isPlayerAlly(ownable.getOwnerId());
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}
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@SubscribeEvent
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public static void onLivingAttackEvent(LivingAttackEvent event){
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if(event.getSource() != null && event.getSource().getTrueSource() instanceof EntityPlayer
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&& event.getSource() instanceof IElementalDamage){
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if(event.getEntity() instanceof EntityPlayer){
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// Prevents any magic damage to allied players if friendly fire is disabled for players
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if(Wizardry.settings.friendlyFire.blockPlayers && isPlayerAlly((EntityPlayer)event.getSource().getTrueSource(), (EntityPlayer)event.getEntity())){
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event.setCanceled(true);
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}
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}else{
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// Prevents any magic damage to entities owned by allied players if friendly fire is disabled for owned creatures
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// Since we're dealing with players separately we might as well just use isAllied
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if(Wizardry.settings.friendlyFire.blockOwned && isAllied((EntityPlayer)event.getSource().getTrueSource(), event.getEntityLiving())){
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event.setCanceled(true);
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}
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}
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}
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}
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}
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