CharacterAdapter.kt

package br.com.samuelnunes.rickandmorty.ui.characters

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.paging.PagingDataAdapter
import androidx.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.RecyclerView
import br.com.samuelnunes.rickandmortyapp.data.entities.Character
import br.com.samuelnunes.rickandmortyapp.databinding.ItemCharacterBinding

class CharactersAdapter(private val listener: CharacterItemListener) :
    PagingDataAdapter<Character, CharactersViewHolder>(CharactersAdapter) {

    private companion object : DiffUtil.ItemCallback<Character>() {
        override fun areItemsTheSame(oldItem: Character, newItem: Character): Boolean {
            return oldItem.id == newItem.id
        }

        override fun areContentsTheSame(oldItem: Character, newItem: Character): Boolean {
            return oldItem == newItem
        }
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CharactersViewHolder {
        val binding = CharactersViewHolder.create(parent)
        return CharactersViewHolder(binding, listener)
    }

    override fun onBindViewHolder(holder: CharactersViewHolder, position: Int) {
        val currentItem = getItem(position)
        if (currentItem != null) {
            holder.bind(currentItem)
        }
    }
}

interface CharacterItemListener {
    fun onClickedCharacter(character: Character)
}

class CharactersViewHolder(
    private val itemBinding: ItemCharacterBinding,
    private val listener: CharacterItemListener
) : RecyclerView.ViewHolder(itemBinding.root) {
    private lateinit var character: Character
    private val onClick = View.OnClickListener { listener.onClickedCharacter(character) }

    companion object {
        fun create(parent: ViewGroup): ItemCharacterBinding {
            return ItemCharacterBinding.inflate(LayoutInflater.from(parent.context), parent, false)
        }
    }

    init {
        itemBinding.root.setOnClickListener(onClick)
    }

    fun bind(item: Character) {
        character = item
        itemBinding.character = item
    }
}