2024/4/10

package com.example.to_do_application.fragments.list.adapter

import android.view.LayoutInflater
import android.view.ViewGroup
import androidx.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.RecyclerView
import com.example.to_do_application.data.models.ToDoData
import com.example.to_do_application.databinding.RowLayoutBinding


class ListAdapter : RecyclerView.Adapter<ListAdapter.MyViewHolder>() {

    var dataList = emptyList<ToDoData>()

    class MyViewHolder(private val binding: RowLayoutBinding): RecyclerView.ViewHolder(binding.root) {
        fun bind(toDoData: ToDoData){
            binding.toDoData = toDoData
            binding.executePendingBindings()
        }
        companion object{
            fun from(parent: ViewGroup): MyViewHolder {
                val layoutInflater = LayoutInflater.from(parent.context)
                val binding = RowLayoutBinding.inflate(layoutInflater,parent,false)
                return MyViewHolder(binding)
            }
        }
    }


    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int,): MyViewHolder {
       return MyViewHolder.from(parent)
    }

    override fun getItemCount(): Int {
        return dataList.size
    }

    override fun onBindViewHolder(holder: MyViewHolder, position: Int){
       val currentItem = dataList[position]
        holder.bind(currentItem)
    }

    fun setData(toDoData: List<ToDoData>){
        val toDoDiffUtil = ToDoDiffUtil(dataList,toDoData)
        val toDoDiffResult =DiffUtil.calculateDiff(toDoDiffUtil)
        this.dataList = toDoData
        toDoDiffResult.dispatchUpdatesTo(this)
    }

}

package com.example.to_do_application.fragments.list.adapter

import androidx.recyclerview.widget.DiffUtil
import com.example.to_do_application.data.models.ToDoData

class ToDoDiffUtil(
    private  val oldList: List<ToDoData>,
    private  val newList: List<ToDoData>
): DiffUtil.Callback() {
    override fun getOldListSize(): Int {
        return oldList.size
    }

    override fun getNewListSize(): Int {
        return newList.size
    }

    override fun areItemsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
        return oldList[oldItemPosition] === newList[newItemPosition]
    }

    override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
       return oldList[oldItemPosition].id == newList[newItemPosition].id
               && oldList[oldItemPosition].tile == newList[newItemPosition].tile
               && oldList[oldItemPosition].description == newList[newItemPosition].description
               && oldList[oldItemPosition].priority == newList[newItemPosition].priority
    }

}