85 lines
3.3 KiB
Kotlin
85 lines
3.3 KiB
Kotlin
package org.mosad.teapod.ui.activity.main.fragments
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import android.os.Bundle
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import android.view.LayoutInflater
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import android.view.View
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import android.view.ViewGroup
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import androidx.fragment.app.Fragment
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import androidx.lifecycle.lifecycleScope
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import androidx.recyclerview.widget.GridLayoutManager
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import androidx.recyclerview.widget.RecyclerView
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import kotlinx.coroutines.launch
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import org.mosad.teapod.databinding.FragmentLibraryBinding
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import org.mosad.teapod.parser.crunchyroll.Crunchyroll
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import org.mosad.teapod.util.ItemMedia
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import org.mosad.teapod.util.adapter.MediaItemAdapter
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import org.mosad.teapod.util.adapter.MediaItemListAdapter
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import org.mosad.teapod.util.decoration.MediaItemDecoration
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import org.mosad.teapod.util.showFragment
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import org.mosad.teapod.util.toItemMediaList
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class LibraryFragment : Fragment() {
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private lateinit var binding: FragmentLibraryBinding
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private lateinit var adapter: MediaItemListAdapter
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private val itemList = arrayListOf<ItemMedia>()
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private val pageSize = 30
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private var nextItemIndex = 0
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override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
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binding = FragmentLibraryBinding.inflate(inflater, container, false)
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return binding.root
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}
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override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
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super.onViewCreated(view, savedInstanceState)
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binding.recyclerMediaLibrary.addItemDecoration(MediaItemDecoration(9))
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// TODO replace with pagination3
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// https://medium.com/swlh/paging3-recyclerview-pagination-made-easy-333c7dfa8797
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binding.recyclerMediaLibrary.addOnScrollListener(PaginationScrollListener())
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// init async
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lifecycleScope.launch {
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// create and set the adapter, needs context
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context?.let {
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itemList.addAll(Crunchyroll.browse(n = pageSize).toItemMediaList())
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nextItemIndex += pageSize
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adapter = MediaItemListAdapter(MediaItemListAdapter.OnClickListener {
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activity?.showFragment(MediaFragment(it.id))
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})
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binding.recyclerMediaLibrary.adapter = adapter
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adapter.submitList(itemList)
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}
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}
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}
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inner class PaginationScrollListener: RecyclerView.OnScrollListener() {
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private var isLoading = false
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override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
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super.onScrolled(recyclerView, dx, dy)
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val layoutManager = recyclerView.layoutManager as GridLayoutManager?
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if (!isLoading) layoutManager?.let {
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// itemList.size - 5 to start loading a bit earlier than the actual end
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if (layoutManager.findLastCompletelyVisibleItemPosition() >= (itemList.size - 5)) {
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// load new browse results async
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isLoading = true
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lifecycleScope.launch {
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val firstNewItemIndex = itemList.lastIndex + 1
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itemList.addAll(Crunchyroll.browse(start = nextItemIndex, n = pageSize).toItemMediaList())
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nextItemIndex += pageSize
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adapter.notifyItemRangeInserted(firstNewItemIndex, pageSize)
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isLoading = false
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}
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}
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}
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}
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}
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} |