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package cat.freya.khs.bukkit.event
import cat.freya.khs.bukkit.BukkitKhsPlayer
import cat.freya.khs.bukkit.KhsPlugin
import cat.freya.khs.bukkit.disguise.Disguise
import cat.freya.khs.event.DamageEvent
import cat.freya.khs.event.onDamage
import com.github.retrooper.packetevents.PacketEvents
import com.github.retrooper.packetevents.event.PacketListener as PacketListenerPE
import com.github.retrooper.packetevents.event.PacketListenerPriority
import com.github.retrooper.packetevents.event.PacketReceiveEvent
import com.github.retrooper.packetevents.event.PacketSendEvent
import com.github.retrooper.packetevents.protocol.packettype.PacketType.Play.Client.INTERACT_ENTITY
import com.github.retrooper.packetevents.protocol.packettype.PacketType.Play.Server.*
import com.github.retrooper.packetevents.wrapper.play.client.WrapperPlayClientInteractEntity
import com.github.retrooper.packetevents.wrapper.play.server.*
import java.util.UUID
import org.bukkit.GameMode
import org.bukkit.attribute.Attribute
import org.bukkit.entity.Player as BukkitPlayer
class PacketListener(val plugin: KhsPlugin) : PacketListenerPE {
private val debounce = mutableSetOf<UUID>()
init {
PacketEvents.getAPI().eventManager.registerListener(this, PacketListenerPriority.NORMAL)
}
// intercept entity-related packets of entities that
// are supposed to be hidden
override fun onPacketSend(event: PacketSendEvent) {
val player = event.getPlayer() as? BukkitPlayer ?: return
val entityId =
when (event.packetType) {
ENTITY_EQUIPMENT -> WrapperPlayServerEntityEquipment(event).entityId
ENTITY_ANIMATION -> WrapperPlayServerEntityAnimation(event).entityId
SPAWN_ENTITY -> WrapperPlayServerSpawnEntity(event).entityId
ENTITY_VELOCITY -> WrapperPlayServerEntityVelocity(event).entityId
ENTITY_HEAD_LOOK -> WrapperPlayServerEntityHeadLook(event).entityId
ENTITY_TELEPORT -> WrapperPlayServerEntityTeleport(event).entityId
ENTITY_STATUS -> WrapperPlayServerEntityStatus(event).entityId
ENTITY_METADATA -> WrapperPlayServerEntityMetadata(event).entityId
ENTITY_EFFECT -> WrapperPlayServerEntityEffect(event).entityId
REMOVE_ENTITY_EFFECT -> WrapperPlayServerRemoveEntityEffect(event).entityId
else -> return
}
if (!plugin.entityHider.isVisible(player, entityId)) {
event.setCancelled(true)
}
}
// check when a player is trying to attack a disguise
override fun onPacketReceive(event: PacketReceiveEvent) {
val player = event.getPlayer() as? BukkitPlayer ?: return
// we want interact event
if (event.packetType != INTERACT_ENTITY) return
val packet = WrapperPlayClientInteractEntity(event)
// attacking only
val action = packet.action ?: return
if (action != WrapperPlayClientInteractEntity.InteractAction.ATTACK) return
val disguise =
plugin.disguiser.getByEntityId(packet.entityId)
?: plugin.disguiser.getByHitboxId(packet.entityId)
?: return
if (disguise.player.gameMode == GameMode.CREATIVE) return
event.setCancelled(true)
handleAttack(disguise, player)
}
private fun handleAttack(disguise: Disguise, seeker: BukkitPlayer) {
if (disguise.player.uniqueId == seeker.uniqueId) return
val fallbackAmount = 7.0
val amount =
if (plugin.shim.supports(9)) {
val attribName =
if (plugin.shim.supports(21)) "ATTACK_DAMAGE" else "GENERIC_ATTACK_DAMAGE"
val attrib = Attribute.valueOf(attribName)
seeker.getAttribute(attrib)?.value ?: fallbackAmount
} else {
fallbackAmount // uhhh i dunno how to do this for 1.8
}
val debounceUUID = disguise.player.uniqueId
disguise.shouldBeSolid = false
if (debounce.contains(debounceUUID)) return
// trigger an attack event
val khsPlayer = BukkitKhsPlayer(plugin.shim, disguise.player)
val khsSeeker = BukkitKhsPlayer(plugin.shim, seeker)
val khsEvent = DamageEvent(plugin.khs, khsPlayer, khsSeeker, amount)
onDamage(khsEvent)
// set and soon turn off debounce
debounce.add(debounceUUID)
plugin.server.scheduler.scheduleSyncDelayedTask(
plugin,
{ debounce.remove(debounceUUID) },
10,
)
}
}
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