129 lines
4.8 KiB
Kotlin
129 lines
4.8 KiB
Kotlin
package com.keylesspalace.tusky.components.search.fragments
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import android.os.Bundle
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import android.view.View
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import androidx.fragment.app.Fragment
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import androidx.fragment.app.activityViewModels
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import androidx.lifecycle.lifecycleScope
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import androidx.paging.LoadState
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import androidx.paging.PagingData
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import androidx.paging.PagingDataAdapter
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import androidx.recyclerview.widget.DividerItemDecoration
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import androidx.recyclerview.widget.LinearLayoutManager
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import androidx.recyclerview.widget.SimpleItemAnimator
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import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
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import com.google.android.material.snackbar.Snackbar
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import com.keylesspalace.tusky.AccountActivity
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import com.keylesspalace.tusky.BottomSheetActivity
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import com.keylesspalace.tusky.R
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import com.keylesspalace.tusky.ViewTagActivity
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import com.keylesspalace.tusky.components.search.SearchViewModel
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import com.keylesspalace.tusky.databinding.FragmentSearchBinding
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import com.keylesspalace.tusky.di.Injectable
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import com.keylesspalace.tusky.di.ViewModelFactory
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import com.keylesspalace.tusky.interfaces.LinkListener
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import com.keylesspalace.tusky.util.viewBinding
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import com.keylesspalace.tusky.util.visible
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import kotlinx.coroutines.flow.Flow
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import kotlinx.coroutines.flow.collectLatest
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import kotlinx.coroutines.launch
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import javax.inject.Inject
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abstract class SearchFragment<T : Any> :
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Fragment(R.layout.fragment_search),
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LinkListener,
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Injectable,
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SwipeRefreshLayout.OnRefreshListener {
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@Inject
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lateinit var viewModelFactory: ViewModelFactory
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protected val viewModel: SearchViewModel by activityViewModels { viewModelFactory }
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protected val binding by viewBinding(FragmentSearchBinding::bind)
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private var snackbarErrorRetry: Snackbar? = null
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abstract fun createAdapter(): PagingDataAdapter<T, *>
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abstract val data: Flow<PagingData<T>>
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protected lateinit var adapter: PagingDataAdapter<T, *>
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private var currentQuery: String = ""
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override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
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initAdapter()
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setupSwipeRefreshLayout()
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subscribeObservables()
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}
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private fun setupSwipeRefreshLayout() {
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binding.swipeRefreshLayout.setOnRefreshListener(this)
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binding.swipeRefreshLayout.setColorSchemeResources(R.color.tusky_blue)
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}
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private fun subscribeObservables() {
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viewLifecycleOwner.lifecycleScope.launch {
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data.collectLatest { pagingData ->
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adapter.submitData(pagingData)
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}
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}
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adapter.addLoadStateListener { loadState ->
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if (loadState.refresh is LoadState.Error) {
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showError()
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}
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val isNewSearch = currentQuery != viewModel.currentQuery
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binding.searchProgressBar.visible(loadState.refresh == LoadState.Loading && isNewSearch && !binding.swipeRefreshLayout.isRefreshing)
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binding.searchRecyclerView.visible(loadState.refresh is LoadState.NotLoading || !isNewSearch || binding.swipeRefreshLayout.isRefreshing)
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if (loadState.refresh != LoadState.Loading) {
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binding.swipeRefreshLayout.isRefreshing = false
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currentQuery = viewModel.currentQuery
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}
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binding.progressBarBottom.visible(loadState.append == LoadState.Loading)
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binding.searchNoResultsText.visible(loadState.refresh is LoadState.NotLoading && adapter.itemCount == 0 && viewModel.currentQuery.isNotEmpty())
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}
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}
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private fun initAdapter() {
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binding.searchRecyclerView.addItemDecoration(DividerItemDecoration(binding.searchRecyclerView.context, DividerItemDecoration.VERTICAL))
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binding.searchRecyclerView.layoutManager = LinearLayoutManager(binding.searchRecyclerView.context)
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adapter = createAdapter()
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binding.searchRecyclerView.adapter = adapter
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binding.searchRecyclerView.setHasFixedSize(true)
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(binding.searchRecyclerView.itemAnimator as SimpleItemAnimator).supportsChangeAnimations = false
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}
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private fun showError() {
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if (snackbarErrorRetry?.isShown != true) {
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snackbarErrorRetry = Snackbar.make(binding.root, R.string.failed_search, Snackbar.LENGTH_INDEFINITE)
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snackbarErrorRetry?.setAction(R.string.action_retry) {
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snackbarErrorRetry = null
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adapter.retry()
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}
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snackbarErrorRetry?.show()
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}
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}
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override fun onViewAccount(id: String) = startActivity(AccountActivity.getIntent(requireContext(), id))
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override fun onViewTag(tag: String) = startActivity(ViewTagActivity.getIntent(requireContext(), tag))
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override fun onViewUrl(url: String) {
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bottomSheetActivity?.viewUrl(url)
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}
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protected val bottomSheetActivity
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get() = (activity as? BottomSheetActivity)
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override fun onRefresh() {
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adapter.refresh()
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}
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}
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