commonMain.tech.skot.model.SKManualData.kt Maven / Gradle / Ivy

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package tech.skot.model

import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.serialization.SerialName
import kotlinx.serialization.Serializable
import kotlin.reflect.KProperty

open class SKManualData(initialValue: D, private val onChange: (() -> Unit)? = null) :
    SKData {

    override val flow = MutableStateFlow(DatedData(initialValue, currentTimeMillis()))
    override val defaultValidity = Long.MAX_VALUE
    override val _current: DatedData
        get() = flow.value

    private val onChangeListeners = mutableSetOf<(newVal: D) -> Unit>()
    fun onChange(listener: (newVal: D) -> Unit) {
        onChangeListeners.add(listener)
    }

    fun removeOnChangeListener(listener: (newVal: D) -> Unit) {
        onChangeListeners.remove(listener)
    }

    var value: D
        get() = _current.data
        set(newValue) {
            val oldValue = flow.value
            if (newValue != oldValue) {
                flow.value = DatedData(newValue)
                onChange?.invoke()
                onChangeListeners.forEach {
                    it.invoke(newValue)
                }
            }
        }

    override suspend fun update(): D {
        return _current.data
    }

    override suspend fun fallBackValue(): D? = _current.data

    operator fun setValue(thisObj: Any?, property: KProperty<*>, value: D) {
        this.value = value
    }

    operator fun getValue(thisObj: Any?, property: KProperty<*>) = this.value
}