PlayerAndroid/app/src/main/java/code/name/monkey/retromusic/fragments/genres/GenresFragment.kt

/*
 * Copyright (c) 2019 Hemanth Savarala.
 *
 * Licensed under the GNU General Public License v3
 *
 * This is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by
 *  the Free Software Foundation either version 3 of the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 */

package code.name.monkey.retromusic.fragments.genres

import android.os.Bundle
import android.view.View
import androidx.lifecycle.Observer
import androidx.recyclerview.widget.LinearLayoutManager
import code.name.monkey.retromusic.R
import code.name.monkey.retromusic.adapter.GenreAdapter
import code.name.monkey.retromusic.fragments.base.AbsRecyclerViewFragment
import code.name.monkey.retromusic.interfaces.MainActivityFragmentCallbacks

class GenresFragment : AbsRecyclerViewFragment<GenreAdapter, LinearLayoutManager>(),
    MainActivityFragmentCallbacks {

    override fun handleBackPress(): Boolean {
        return false
    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        libraryViewModel.genresLiveData
            .observe(viewLifecycleOwner, Observer { genres ->
                if (genres.isNotEmpty()) {
                    adapter?.swapDataSet(genres)
                } else {
                    adapter?.swapDataSet(listOf())
                }
            })
    }


    override fun createLayoutManager(): LinearLayoutManager {
        return LinearLayoutManager(activity)
    }

    override fun createAdapter(): GenreAdapter {
        val dataSet = if (adapter == null) ArrayList() else adapter!!.dataSet
        return GenreAdapter(requireActivity(), dataSet, R.layout.item_list_no_image)
    }

    override val emptyMessage: Int
        get() = R.string.no_genres

    companion object {
        @JvmField
        val TAG: String = GenresFragment::class.java.simpleName

        @JvmStatic
        fun newInstance(): GenresFragment {
            return GenresFragment()
        }
    }
}