commonMain.ru.alexey.event.threads.StateSaver.kt Maven / Gradle / Ivy

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package ru.alexey.event.threads

import androidx.compose.runtime.compositionLocalOf
import kotlin.reflect.KClass

interface StateSaver {

    val savedParams: Map, () -> Any>
    fun  save(clazz: KClass, instance: T)

    fun  load(clazz: KClass): T?

    fun  remove(clazz: KClass)
}

internal class DefaultStateSaver : StateSaver {
    private val map = mutableMapOf, Any>()
    override val savedParams: Map, () -> Any>
        get() = map.mapValues {
            { it.value }
        }

    override fun  save(clazz: KClass, instance: T) {
        map[clazz] = instance
    }

    override fun  load(clazz: KClass): T? {
        return map[clazz] as? T
    }

    override fun  remove(clazz: KClass) {
        map.remove(clazz)
    }
}

val LocalStateSaver = compositionLocalOf {
    error("Provide State Saver")
}