Manage operational layers

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/*
 * Copyright 2020 Esri
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package com.esri.arcgisruntime.sample.manageoperationallayers

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.recyclerview.widget.ItemTouchHelper
import androidx.recyclerview.widget.RecyclerView
import com.esri.arcgisruntime.layers.Layer
import com.esri.arcgisruntime.mapping.LayerList

class LayerListAdapter(private val dataSet: LayerList) :
    RecyclerView.Adapter<LayerListAdapter.ViewHolder>() {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val v = LayoutInflater.from(parent.context).inflate(R.layout.layer_item, parent, false)
        return ViewHolder(v)
    }

    override fun getItemCount(): Int = dataSet.size

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        holder.textView.text = dataSet[position].name
    }

    class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        val textView: TextView = itemView.findViewById(R.id.layerName)
    }
}

class InactiveListAdapter(
    private val dataSet: MutableList<Layer>,
    private val onItemClick: (pos: Int) -> Unit
) : RecyclerView.Adapter<InactiveListAdapter.ViewHolder>() {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val v =
            LayoutInflater.from(parent.context).inflate(R.layout.inactive_layer_item, parent, false)
        return ViewHolder(v)
    }

    override fun getItemCount() = dataSet.size

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        holder.textView.text = dataSet[position].name
        holder.onClick = onItemClick
    }

    class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        val textView: TextView = itemView.findViewById(R.id.deletedLayerName)
        var onClick: ((Int) -> Unit)? = null

        init {
            itemView.setOnClickListener { onClick?.invoke(adapterPosition) }
        }
    }
}

class DragCallback(
    private val onItemMove: (oldPosition: Int, targetPosition: Int) -> Unit,
    private val onItemSwiped: (position: Int) -> Unit
) : ItemTouchHelper.Callback() {

    override fun isLongPressDragEnabled() = true
    override fun isItemViewSwipeEnabled() = true

    override fun getMovementFlags(
        recyclerView: RecyclerView,
        viewHolder: RecyclerView.ViewHolder
    ): Int = makeMovementFlags(
        ItemTouchHelper.UP or ItemTouchHelper.DOWN,
        ItemTouchHelper.LEFT or ItemTouchHelper.RIGHT
    )

    override fun onMove(
        recyclerView: RecyclerView,
        viewHolder: RecyclerView.ViewHolder,
        target: RecyclerView.ViewHolder
    ): Boolean {
        onItemMove(viewHolder.adapterPosition, target.adapterPosition)
        return true
    }

    override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
        onItemSwiped(viewHolder.adapterPosition)
    }
}