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package cat.freya.khs.bukkit.disguise
import cat.freya.khs.bukkit.packet.EntityDestroyPacket
import cat.freya.khs.bukkit.packet.EntityMetadataPacket
import com.google.common.collect.HashBasedTable
import com.google.common.collect.Table
import org.bukkit.entity.Entity as BukkitEntity
import org.bukkit.entity.Player as BukkitPlayer
class EntityHider {
val map: Table<Int, Int, Boolean> = HashBasedTable.create()
// is entity visible for the observer
fun isVisible(observer: BukkitPlayer, entityId: Int): Boolean =
runCatching {
val observerId = observer.entityId
!map.contains(observerId, entityId)
}
.getOrElse { true }
// is entity visible for the observer
fun isVisible(observer: BukkitPlayer, entity: BukkitEntity): Boolean =
runCatching { isVisible(observer, entity.entityId) }.getOrElse { true }
// set if the entity is hidden for the observer
fun setVisible(observer: BukkitPlayer, entity: BukkitEntity, visible: Boolean) = runCatching {
val observerId = observer.entityId
val entityId = entity.entityId
val ret =
if (visible) map.put(entityId, observerId, true) else map.remove(entityId, observerId)
ret ?: visible
}
// removes a hidden entity from the map
fun removeEntity(entity: BukkitEntity) =
runCatching { entity.entityId }
.onSuccess { for (row in map.rowMap().values) row.remove(it) }
// removes a player from the map
fun removePlayer(player: BukkitPlayer) =
runCatching { player.entityId }.onSuccess { map.rowMap().remove(it) }
// hides and entity
fun hideEntity(observer: BukkitPlayer, entity: BukkitEntity) {
setVisible(observer, entity, false)
val packet = EntityDestroyPacket(entity)
packet.send(observer)
}
// unhides the entity
fun showEntity(observer: BukkitPlayer, entity: BukkitEntity) {
setVisible(observer, entity, true)
val packet = EntityMetadataPacket(entity, false)
packet.send(observer)
}
}
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