OttoBot/src/main/kotlin/nl/voidcorp/dbot/Util.kt

package nl.voidcorp.dbot

import com.google.gson.Gson
import com.google.gson.GsonBuilder
import nl.voidcorp.dbot.commands.UnityCommand
import javax.script.ScriptEngineManager
import kotlin.random.Random


val gson: Gson = GsonBuilder().setPrettyPrinting().create()


fun <E> MutableList<E>.addAll(vararg e: E) = this.addAll(listOf(*e))

fun <E> List<E>.random(): E = this[Random.nextInt(this.size)]

fun List<UnityCommand>.catMap(): Map<String, List<UnityCommand>> {
    val m = mutableMapOf<String, MutableList<UnityCommand>>()
    for (c in this) {
        val cname = c.category.name
        if (!m.containsKey(cname)) {
            m[cname] = mutableListOf()
        }

        m[cname]!! += c
    }
    return m
}

fun String.emptyOr(other: String): String = if (this.isEmpty()) other else this

val sem = ScriptEngineManager()
fun run(st: String, ret: String = "x", scriptEngine: String = "luaj"): Any {
    val se = sem.getEngineByName(scriptEngine)
    se.eval(st)
    return se.get(ret)
}