DialogBuilder in Kotlin DSL (WIP)

DialogBuilder.kt

class DialogBuilder(val activityContext: FragmentActivity) {
    class TextBuilder(val context: Context) {
        sealed class TextConfig {
            data class TitleConfig(
                val text: String,
                val bold: Boolean = true,
                @DimenRes val textSizeSdp: Int = R.dimen._16sdp
            ): TextConfig()

            data class ContentConfig(
                val text: String,
                val bold: Boolean = false,
                @DimenRes val textSizeSdp: Int = R.dimen._11sdp
            ): TextConfig()
        }

        fun init(config: TextConfig): TextView {
            return TextView(context).apply {
                text = config.text
                textSize = resources.getDimensionPixelSize(config.textSizeSdp).toDp(context)
                if (config.bold) {
                    setTypeface(Typeface.DEFAULT_BOLD)
                }
            }
        }
    }

    class ImageBuilder(val context: Context) {
        // as our app uses SDP to align size among android screen sizes,
        // so providing static height and width is safe for various device types
        data class ImageConfig(
            @DrawableRes val src: Int,
            @DimenRes val height: Int? = null,
            @DimenRes val width: Int? = null
        )

        fun init(config: ImageConfig): ImageView {
            if (config.height == null && config.width == null) {
                throw Exception("you must provide at least height or width")
            }
            return ImageView(context).apply {
                setImageResource(config.src)
                updateLayoutParams {
                    if (config.height != null) {
                        height = resources.getDimensionPixelSize(config.height)
                    }
                    if (config.width != null) {
                        width = resources.getDimensionPixelOffset(config.width)
                    }
                }
            }
        }
    }

    private val layoutSequence = mutableListOf<View>()

    fun addText(config: TextBuilder.TextConfig) {
        layoutSequence.add(TextBuilder(activityContext).init(config))
    }

    fun addImage(config: ImageBuilder.ImageConfig) {
        layoutSequence.add(ImageBuilder(activityContext).init(config))
    }

    // todo addCustomLayout()
    
    fun addDivider() {
        layoutSequence.add(Divider(context = activityContext))
    }

    fun build(): DialogPlus {
        val d = DialogPlus.newDialog(activityContext)
            .setOverlayBackgroundResource(R.color.dialog_overlay_color)
            .setExpanded(false)
            .setGravity(Gravity.CENTER)
            .setContentWidth((System.getScreenWidth() * 0.85).toInt())
            .setContentBackgroundResource(Color.TRANSPARENT)
            .setContentHolder(ViewHolder(R.layout.title_image_message_yes_dalog))
            .setCancelable(false)
            .create()
        
        val titleTv = d.findViewById(R.id.titleTv) as TextView
        val image = d.findViewById(R.id.image) as ImageView
        val imgClose = d.findViewById(R.id.closeImg) as ImageView
        val msgTv = d.findViewById(R.id.msgTv) as TextView
        val confirmTv = d.findViewById(R.id.confirmTv) as TextView

        Glide.with(image.context)
            .load(R.drawable.sv_image_invite_new_banner_tutorial_sim)
            .into(image)

        titleTv.text = System.getLocalString("dialog_invite_coupon_title")
        msgTv.text = System.getLocalString("onboarding_alert_msg_visitor_mode_with_invitecode")
        confirmTv.text = System.getLocalString("general_button_confirm")
        imgClose.setOnClickListener { v -> d.dismiss() }
        // prevent double click.
        confirmTv.clicks()
            .throttleFirst(500, TimeUnit.MICROSECONDS)
            .doOnNext { Unit ->
                d.dismiss()
                callback.onVoid()
            }
            .subscribe()
        d.show()
    }

}

fun FragmentActivity.dialogBuilder(setup: DialogBuilder.() -> Unit): DialogPlus {
    val dialog = DialogBuilder(this)
    dialog.setup()
    return dialog.build()
}