archive-97f2350/app/src/main/java/uk/orllewin/sianel/ui/ListScreen.kt
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package uk.orllewin.sianel.ui
import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.material3.AlertDialog
import androidx.compose.material3.Button
import androidx.compose.material3.CircularProgressIndicator
import androidx.compose.material3.ExperimentalMaterial3Api
import androidx.compose.material3.LinearProgressIndicator
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Text
import androidx.compose.material3.TextButton
import androidx.compose.material3.pulltorefresh.PullToRefreshBox
import androidx.compose.material3.pulltorefresh.PullToRefreshDefaults
import androidx.compose.material3.pulltorefresh.rememberPullToRefreshState
import androidx.compose.runtime.Composable
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.unit.dp
import androidx.paging.LoadState
import androidx.paging.compose.collectAsLazyPagingItems
import androidx.paging.compose.itemKey
import uk.orllewin.sianel.R
import uk.orllewin.sianel.ui.components.video_list.VideoRow
@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun ListScreen(viewModel: MainViewModel, paddingValues: PaddingValues) {
val context = LocalContext.current
val lazyVideos = viewModel.videoPager.collectAsLazyPagingItems()
val refreshing = lazyVideos.loadState.refresh is LoadState.Loading
val pullState = rememberPullToRefreshState()
PullToRefreshBox(
isRefreshing = refreshing,
onRefresh = { lazyVideos.refresh() },
state = pullState,
modifier = Modifier.fillMaxSize(),
indicator = {
// The default indicator anchors to the box top — that's under our
// top app bar. Offset it below the bar so the pull spinner is visible.
PullToRefreshDefaults.Indicator(
state = pullState,
isRefreshing = refreshing,
modifier = Modifier
.align(Alignment.TopCenter)
.padding(top = paddingValues.calculateTopPadding()),
)
},
) {
LazyColumn(
modifier = Modifier.fillMaxSize(),
contentPadding = PaddingValues(
start = 16.dp,
end = 16.dp,
top = paddingValues.calculateTopPadding() + 16.dp,
bottom = paddingValues.calculateBottomPadding() + 16.dp,
),
verticalArrangement = Arrangement.spacedBy(8.dp),
) {
viewModel.uploadProgress?.let { p ->
item {
LinearProgressIndicator(
progress = { p },
modifier = Modifier.fillMaxWidth(),
)
}
}
if (viewModel.status.isNotBlank()) {
item { Text(viewModel.status, style = MaterialTheme.typography.bodySmall) }
}
item { Text(stringResource(R.string.videos), style = MaterialTheme.typography.titleMedium) }
items(
count = lazyVideos.itemCount,
key = lazyVideos.itemKey { it.hash },
) { index ->
val v = lazyVideos[index] ?: return@items
VideoRow(
item = v,
onOpen = { openUrl(context, v.url) },
onDelete = { viewModel.askDelete(v.hash) },
)
}
// First-load / empty / error states.
when (val refresh = lazyVideos.loadState.refresh) {
is LoadState.Error ->
item { ErrorRow(refresh.error.message ?: stringResource(R.string.failed_to_load)) { lazyVideos.retry() } }
is LoadState.NotLoading ->
if (lazyVideos.itemCount == 0) {
item { Text(stringResource(R.string.no_videos_uploaded), style = MaterialTheme.typography.bodySmall) }
}
is LoadState.Loading ->
// if (lazyVideos.itemCount == 0) item { CenterSpinner() }
{}
}
// Next-page (append) states.
when (val append = lazyVideos.loadState.append) {
is LoadState.Loading -> item { CenterSpinner() }
is LoadState.Error ->
item { ErrorRow(append.error.message ?: stringResource(R.string.error_loading_more)) { lazyVideos.retry() } }
else -> {}
}
}
}
viewModel.pendingDeleteHash?.let { hash ->
AlertDialog(
onDismissRequest = viewModel::cancelDelete,
title = { Text(stringResource(R.string.delete_video)) },
text = { Text(stringResource(R.string.will_be_permanently_removed, hash)) },
confirmButton = {
TextButton(onClick = viewModel::confirmDelete) { Text(stringResource(R.string.delete)) }
},
dismissButton = {
TextButton(onClick = viewModel::cancelDelete) { Text(stringResource(R.string.cancel)) }
},
)
}
}
@Composable
private fun CenterSpinner() {
Box(
modifier = Modifier
.fillMaxWidth()
.padding(16.dp),
contentAlignment = Alignment.Center,
) {
CircularProgressIndicator()
}
}
@Composable
private fun ErrorRow(message: String, onRetry: () -> Unit) {
Column(
modifier = Modifier
.fillMaxWidth()
.padding(16.dp),
horizontalAlignment = Alignment.CenterHorizontally,
verticalArrangement = Arrangement.spacedBy(8.dp),
) {
Text(message, style = MaterialTheme.typography.bodySmall)
Button(onClick = onRetry) { Text(stringResource(R.string.retry)) }
}
}