Find image in urls by size ImageView

ImageUtils.kt

import kotlin.math.abs

/**
 * @since 2018
 * @author Anton Vlasov - whalemare
 */
object ImageUtils {
    /**
     * Choose prefer image size by map entry set.
     * @param height your avatar holder height in px
     * @param width your avatar holder width in px
     * @return null if map == null || resource == null, otherwise prefer image url or original.
     */
    fun getPreferUrl(height: Int, width: Int, images: List<Background>?): Background? {
        if (images == null || images.isEmpty()) return null

        val preferHeight = getClosest(height, images.filter { it.height != null && it.height >= 0 }.map { it.height!! })
        val preferWidth = getClosest(width, images.filter { it.width != null && it.width >= 0 }.map { it.width!! })

        images.forEach {
            if (it.width == preferWidth && it.height == preferHeight) {
                return it
            } else if (it.height == preferHeight) {
                return it
            } else if (it.width == preferWidth) {
                return it
            }
        }

        return images.firstOrNull()
    }

    fun getClosest(middle: Int, numbers: List<Int>): Int {
        var min = Int.MAX_VALUE
        var number = middle
        var delta = 0

        numbers.forEach {
            delta = abs(it - middle)
            if (delta < min) {
                min = delta
                number = it
            }
        }
        return number
    }
}

data class Background(
    val imageUrl: String? = "",
    val title: String? = "",
    val width: Int? = null,
    val height: Int? = null
)