WineListViewHolder.kt

package com.deguvino.mobile.deguvino.activity.fragment.menu.exhibition.winelist.winelistviewholders

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.annotation.LayoutRes
import androidx.recyclerview.widget.RecyclerView
import com.deguvino.mobile.deguvino.R
import com.deguvino.mobile.deguvino.activity.fragment.menu.exhibition.winelist.winelistviewmodels.WineBodyViewModel
import com.deguvino.mobile.deguvino.activity.fragment.menu.exhibition.winelist.winelistviewmodels.WineHeaderViewModel
import com.deguvino.mobile.deguvino.activity.fragment.menu.exhibition.winelist.winelistviewmodels.WineSubHeaderViewModel
import kotlinx.android.extensions.LayoutContainer
import kotlinx.android.synthetic.main.item_wine_list_body.view.*
import kotlinx.android.synthetic.main.item_wine_list_header.*
import kotlinx.android.synthetic.main.item_wine_list_sub_header.*

// base rv
abstract class BaseRvViewHolder(
        override val containerView: View
) : RecyclerView.ViewHolder(containerView), LayoutContainer

// base rv
interface ViewHolderViewCreator {
    @get:LayoutRes
    val layoutId: Int

    fun inflate(parent: ViewGroup) = LayoutInflater.from(parent.context)
            .inflate(WineHeaderViewHolder.layoutId, parent, false)

}

// base rv
interface BindViewHolder<T> {
    fun bind(data: T)
}


sealed class WineListViewHolder(containerView: View) : BaseRvViewHolder(containerView)

class WineHeaderViewHolder private constructor(
        view: View,
        onClick: (Int) -> Unit
) : WineListViewHolder(view), BindViewHolder<WineHeaderViewModel> {

    // ViewExtensions.kt
    private fun View.onClick(handler: () -> Unit) = setOnClickListener { handler() }

    // RvViewHolderExtensions.kt
    private fun RecyclerView.ViewHolder.onClick(view: View, handler: (Int) -> Unit) {
        view.onClick {
            adapterPosition.takeIf { it != RecyclerView.NO_POSITION }?.let(handler)
        }
    }


    init {
        onClick(ivWineHeaderIndicator, onClick)
    }

    override fun bind(data: WineHeaderViewModel) {
        tvWineHeaderTitle.text = data.title
        ivWineHeaderIndicator.setImageResource(data.headerIndicator)
    }


    companion object : ViewHolderViewCreator {
        override val layoutId: Int = R.layout.item_wine_list_header

        operator fun invoke(parent: ViewGroup, l: (Int) -> Unit) = WineHeaderViewHolder(
                inflate(parent), l
        )


    }

}

class WineSubHeaderViewHolder private constructor(view: View) : WineListViewHolder(view) {

    fun bind(subHeaderViewModel: WineSubHeaderViewModel) {
        tvWineSubHeaderTitle.text = subHeaderViewModel.title
    }

}

class WineBodyViewHolder(
        view: View
) : WineListViewHolder(view) {

    private val name = view.tvWineName
    private val year = view.tvWineYear
    private val rate = view.tvWineRate
    private val volume = view.tvWineVolume
    private val grapeTitle = view.tvGrapeTitle
    private val editComment = view.etEditComment

    fun bind(wineBodyViewModel: WineBodyViewModel) {
        name.text = wineBodyViewModel.name
        year.text = wineBodyViewModel.year
        rate.text = wineBodyViewModel.rating
        volume.text = wineBodyViewModel.volume
        grapeTitle.text = wineBodyViewModel.grapeTitle
        editComment.setText(wineBodyViewModel.grapeTitle)
    }

}