FastInv Selector component

Selector.kt

package me.lished.events.inventory.components

import fr.mrmicky.fastinv.FastInv
import fr.mrmicky.fastinv.ItemBuilder

fun selector(parent: FastInv, slot: Int, item: ItemBuilder, list: List<String>, padding: Int, selectedColor: String, defaultColor: String, default: Int, onClick: () -> Unit) {
    val range = padding..list.size+(padding-1)
    var selected = default

    parent.setItem(slot, item.lore(mutableListOf<String>().apply {
        repeat(padding) { add("") }

        addAll(list.mapIndexed { index, it ->
            (if (index+range.first == selected) selectedColor else defaultColor) + it
        })
    }).build()) {
        selected++
        if (selected !in range) selected = range.first
        onClick()
    }
}