Lorem Picsum Builder

PicsumBuilder.kt

import android.util.Size

internal fun picsum(width: Int, height: Int): Picsum =
    Picsum(Size(width, height))

class Picsum constructor(
    private var size: Size,
    private var id: Int? = null,
    private var blur: Int = 0,
    private var grayscale: Boolean = false,
    private var random: Boolean = false
) {


    fun id(id: Int): Picsum {
        this.id = id
        return this
    }


    fun blur(blur: Int): Picsum {
        this.blur = blur
        return this
    }

    fun grayscale(): Picsum {
        grayscale = true
        return this
    }

    fun random(): Picsum {
        random = true
        return this
    }

    fun get(): String {
        var url = BASE_URL
        if (id != null) url += "/id/$id"
        url += "/${size.width}/${size.height}"

        var isFirst = false

        if (blur > 0) {
            url += "?blur=$blur"
            isFirst = true
        }

        if (grayscale) {
            url += (if (isFirst) "&" else "?") +  "grayscale"
            isFirst = true
        }

        if (random) {
            url += (if (isFirst) "&" else "?") +  "random=" + System.currentTimeMillis()
            isFirst = true
        }

        return url
    }
    companion object {
        private const val BASE_URL = "https://picsum.photos"
    }
}