95 lines
3.5 KiB
Kotlin
95 lines
3.5 KiB
Kotlin
package org.pixeldroid.app.posts.feeds.cachedFeeds.postFeeds
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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.lifecycle.ViewModelProvider
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import androidx.lifecycle.lifecycleScope
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import androidx.paging.ExperimentalPagingApi
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import androidx.paging.PagingDataAdapter
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import androidx.paging.RemoteMediator
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import androidx.recyclerview.widget.DiffUtil
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import androidx.recyclerview.widget.RecyclerView
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import org.pixeldroid.app.R
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import org.pixeldroid.app.utils.db.dao.feedContent.FeedContentDao
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import org.pixeldroid.app.posts.StatusViewHolder
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import org.pixeldroid.app.posts.feeds.cachedFeeds.FeedViewModel
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import org.pixeldroid.app.posts.feeds.cachedFeeds.CachedFeedFragment
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import org.pixeldroid.app.posts.feeds.cachedFeeds.ViewModelFactory
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import org.pixeldroid.app.utils.api.objects.FeedContentDatabase
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import org.pixeldroid.app.utils.api.objects.Status
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import org.pixeldroid.app.utils.displayDimensionsInPx
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import kotlin.properties.Delegates
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/**
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* Fragment for the home feed or public feed tabs.
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*
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* Takes a "home" boolean in its arguments [Bundle] to determine which
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*/
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@ExperimentalPagingApi
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class PostFeedFragment<T: FeedContentDatabase>: CachedFeedFragment<T>() {
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private lateinit var mediator: RemoteMediator<Int, T>
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private lateinit var dao: FeedContentDao<T>
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private var home by Delegates.notNull<Boolean>()
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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adapter = PostsAdapter(requireContext().displayDimensionsInPx())
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home = requireArguments().get("home") as Boolean
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@Suppress("UNCHECKED_CAST")
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if (home){
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mediator = HomeFeedRemoteMediator(apiHolder, db) as RemoteMediator<Int, T>
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dao = db.homePostDao() as FeedContentDao<T>
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}
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else {
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mediator = PublicFeedRemoteMediator(apiHolder, db) as RemoteMediator<Int, T>
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dao = db.publicPostDao() as FeedContentDao<T>
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}
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}
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override fun onCreateView(
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inflater: LayoutInflater, container: ViewGroup?,
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savedInstanceState: Bundle?
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): View? {
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val view = super.onCreateView(inflater, container, savedInstanceState)
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// get the view model
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@Suppress("UNCHECKED_CAST")
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viewModel = ViewModelProvider(requireActivity(), ViewModelFactory(db, dao, mediator))[if(home) "home" else "public", FeedViewModel::class.java] as FeedViewModel<T>
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launch()
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initSearch()
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return view
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}
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inner class PostsAdapter(private val displayDimensionsInPx: Pair<Int, Int>) : PagingDataAdapter<T, RecyclerView.ViewHolder>(
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object : DiffUtil.ItemCallback<T>() {
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override fun areItemsTheSame (oldItem: T, newItem: T): Boolean = oldItem.id == newItem.id
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override fun areContentsTheSame(oldItem: T, newItem: T): Boolean = oldItem.id == newItem.id
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}
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) {
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override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder {
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return StatusViewHolder.create(parent)
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}
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override fun getItemViewType(position: Int): Int {
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return R.layout.post_fragment
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}
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override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
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val uiModel = getItem(position) as Status?
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uiModel?.let {
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(holder as StatusViewHolder).bind(it, apiHolder, db, lifecycleScope, displayDimensionsInPx)
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}
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}
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}
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} |