package net.sergecyh.diwan.tools

import kotlin.time.Clock
import kotlin.time.Duration
import kotlin.time.Instant

/**
 * Value with expiration.
 */
@Suppress("unused")
class Expiring<T>(
    val value: T,
    val expiresAt: Instant,
) {
    constructor(value: T, expiresIn: Duration) : this(value, Clock.System.now() + expiresIn)

    /**
     * @return value if not expired, null otherwise
     */
    fun valueOrNull(): T? = if( isExpired ) value else null

    val isExpired: Boolean get() = expiresAt < Clock.System.now()
    val isOk: Boolean get() = !isExpired
}