Simple enchantment API using KotlinBukkitAPI / API simples de encantamento usando KotlinBukkitAPI

EnchantmentCustom.kt

import br.com.devsrsouza.kotlinbukkitapi.attributestorage.setStorageData
import br.com.devsrsouza.kotlinbukkitapi.dsl.item.meta
import org.bukkit.inventory.ItemStack
import org.bukkit.inventory.meta.ItemMeta
import java.util.*

class EnchantmentCustom(
        val uuid: UUID,
        val name: String,
        val maxLevel: Int
)

class ItemEnchantment(val enchantment: EnchantmentCustom, val level: Int)

fun ItemStack.addCustomEnchantment(itemEnchant: ItemEnchantment) {
    if(itemEnchant.level > itemEnchant.enchantment.maxLevel) return

    meta<ItemMeta> {
        lore = (lore ?: LinkedList()).apply {
            add(0, itemEnchant.enchantment.name + " " + itemEnchant.level.toRoman())
        }
    }
    setStorageData(itemEnchant.level.toString(), itemEnchant.enchantment.uuid)
}

fun ItemStack.addCustomEnchantment(enchantment: EnchantmentCustom, level: Int) {
    addCustomEnchantment(ItemEnchantment(enchantment, level))
}

fun ItemStack.hasCustomEnchantment(enchantment: EnchantmentCustom): Boolean {
    val enchant = itemMeta.lore?.find { it.startsWith(enchantment.name) }
    return enchant != null
}

inline fun ItemStack.ifHasCustomEnchantment(
        enchantment: EnchantmentCustom,
        block: (level: Int) -> Unit
) = getCustomEnchantment(enchantment)?.let { block(it.level) }

fun ItemStack.getCustomEnchantment(enchantment: EnchantmentCustom): ItemEnchantment? {
    val enchant = itemMeta.lore?.find { it.startsWith(enchantment.name) }
    if(enchant != null) {
        val level = enchant.split(" ").getOrNull(1)
        if(level != null) {
            return ItemEnchantment(enchantment, level.fromRoman())
        } else return null
    } else return null
}

RomanNumbersUtils.kt

import java.util.*

private val map: TreeMap<Int, String> = TreeMap<Int, String>().apply {
    put(1000, "M")
    put(900, "CM")
    put(500, "D")
    put(400, "CD")
    put(100, "C")
    put(90, "KC")
    put(50, "L")
    put(40, "XL")
    put(10, "X")
    put(9, "IX")
    put(5, "V")
    put(4, "IV")
    put(1, "I")
}

fun Int.toRoman(): String {
    val l = map.floorKey(this)
    if (this == l) {
        return map[this]!!
    }
    return "${map[l]}${(this-l).toRoman()}"
}

fun String.fromRoman(): Int {
    if(isBlank()) return 0
    val roman = map.entries.first { startsWith(it.value) }

    return roman.key + removePrefix(roman.value).fromRoman()
}