feat: add batch download for seasons and entire series

Wire up the existing download button on the Series screen to download
all episodes, and add a per-season download button next to the season
tabs. Episode metadata is fetched in parallel for faster queuing.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/src/main/java/hu/bbara/purefin/app/content/series/SeriesComponents.kt

@@ -30,7 +30,9 @@ import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.outlined.Add
 import androidx.compose.material.icons.outlined.ArrowBack
 import androidx.compose.material.icons.outlined.Cast
+import androidx.compose.material.icons.outlined.Close
 import androidx.compose.material.icons.outlined.Download
+import androidx.compose.material.icons.outlined.DownloadDone
 import androidx.compose.material.icons.outlined.MoreVert
 import androidx.compose.material.icons.outlined.PlayCircle
 import androidx.compose.material3.Icon
@@ -59,6 +61,7 @@ import hu.bbara.purefin.common.ui.components.MediaResumeButton
 import hu.bbara.purefin.player.PlayerActivity
 import hu.bbara.purefin.common.ui.components.PurefinAsyncImage
 import hu.bbara.purefin.common.ui.components.WatchStateIndicator
+import hu.bbara.purefin.feature.download.DownloadState
 import hu.bbara.purefin.core.model.CastMember
 import hu.bbara.purefin.core.model.Episode
 import hu.bbara.purefin.core.model.Season
@@ -110,7 +113,12 @@ internal fun SeriesMetaChips(series: Series) {
 }
 
 @Composable
-internal fun SeriesActionButtons(nextUpEpisode: Episode?, modifier: Modifier = Modifier) {
+internal fun SeriesActionButtons(
+    nextUpEpisode: Episode?,
+    downloadState: DownloadState,
+    onDownloadClick: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
     val context = LocalContext.current
     val episodeId = nextUpEpisode?.id
     val playAction = remember(episodeId) {
@@ -142,8 +150,14 @@ internal fun SeriesActionButtons(nextUpEpisode: Episode?, modifier: Modifier = M
         MediaActionButton(
             backgroundColor = MaterialTheme.colorScheme.secondary,
             iconColor = MaterialTheme.colorScheme.onSecondary,
-            icon = Icons.Outlined.Download,
-            height = 32.dp
+            icon = when (downloadState) {
+                is DownloadState.NotDownloaded -> Icons.Outlined.Download
+                is DownloadState.Downloading -> Icons.Outlined.Close
+                is DownloadState.Downloaded -> Icons.Outlined.DownloadDone
+                is DownloadState.Failed -> Icons.Outlined.Download
+            },
+            height = 32.dp,
+            onClick = onDownloadClick
         )
     }
 }
@@ -152,6 +166,8 @@ internal fun SeriesActionButtons(nextUpEpisode: Episode?, modifier: Modifier = M
 internal fun SeasonTabs(
     seasons: List<Season>,
     selectedSeason: Season?,
+    seasonDownloadState: DownloadState,
+    onSeasonDownloadClick: () -> Unit,
     modifier: Modifier = Modifier,
     onSelect: (Season) -> Unit
 ) {
@@ -159,7 +175,8 @@ internal fun SeasonTabs(
         modifier = modifier
             .fillMaxWidth()
             .horizontalScroll(rememberScrollState()),
-        horizontalArrangement = Arrangement.spacedBy(20.dp)
+        horizontalArrangement = Arrangement.spacedBy(20.dp),
+        verticalAlignment = Alignment.CenterVertically
     ) {
         seasons.forEach { season ->
             SeasonTab(
@@ -168,6 +185,18 @@ internal fun SeasonTabs(
                 modifier = Modifier.clickable { onSelect(season) }
             )
         }
+        MediaActionButton(
+            backgroundColor = MaterialTheme.colorScheme.secondary,
+            iconColor = MaterialTheme.colorScheme.onSecondary,
+            icon = when (seasonDownloadState) {
+                is DownloadState.NotDownloaded -> Icons.Outlined.Download
+                is DownloadState.Downloading -> Icons.Outlined.Close
+                is DownloadState.Downloaded -> Icons.Outlined.DownloadDone
+                is DownloadState.Failed -> Icons.Outlined.Download
+            },
+            height = 28.dp,
+            onClick = onSeasonDownloadClick
+        )
     }
 }
 

app/src/main/java/hu/bbara/purefin/app/content/series/SeriesScreen.kt

@@ -14,6 +14,7 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
@@ -27,6 +28,7 @@ import hu.bbara.purefin.common.ui.components.MediaHero
 import hu.bbara.purefin.core.data.navigation.SeriesDto
 import hu.bbara.purefin.core.model.Season
 import hu.bbara.purefin.core.model.Series
+import hu.bbara.purefin.feature.download.DownloadState
 import hu.bbara.purefin.feature.shared.content.series.SeriesViewModel
 
 @Composable
@@ -43,8 +45,12 @@ fun SeriesScreen(
 
     val seriesData = series.value
     if (seriesData != null && seriesData.seasons.isNotEmpty()) {
+        LaunchedEffect(seriesData) {
+            viewModel.observeSeriesDownloadState(seriesData)
+        }
         SeriesScreenInternal(
             series = seriesData,
+            viewModel = viewModel,
             onBack = viewModel::onBack,
             modifier = modifier
         )
@@ -56,6 +62,7 @@ fun SeriesScreen(
 @Composable
 private fun SeriesScreenInternal(
     series: Series,
+    viewModel: SeriesViewModel,
     onBack: () -> Unit,
     modifier: Modifier = Modifier,
 ) {
@@ -80,6 +87,13 @@ private fun SeriesScreenInternal(
         } ?: series.seasons.firstOrNull()?.episodes?.firstOrNull()
     }
 
+    val seriesDownloadState by viewModel.seriesDownloadState.collectAsState()
+    val seasonDownloadState by viewModel.seasonDownloadState.collectAsState()
+
+    LaunchedEffect(selectedSeason.value) {
+        viewModel.observeSeasonDownloadState(selectedSeason.value.episodes)
+    }
+
     Scaffold(
         modifier = modifier,
         containerColor = MaterialTheme.colorScheme.background,
@@ -117,7 +131,11 @@ private fun SeriesScreenInternal(
                 Spacer(modifier = Modifier.height(16.dp))
                 SeriesMetaChips(series = series)
                 Spacer(modifier = Modifier.height(24.dp))
-                SeriesActionButtons(nextUpEpisode = nextUpEpisode)
+                SeriesActionButtons(
+                    nextUpEpisode = nextUpEpisode,
+                    downloadState = seriesDownloadState,
+                    onDownloadClick = { viewModel.downloadSeries(series) }
+                )
                 Spacer(modifier = Modifier.height(24.dp))
                 MediaSynopsis(
                     synopsis = series.synopsis,
@@ -130,6 +148,8 @@ private fun SeriesScreenInternal(
                 SeasonTabs(
                     seasons = series.seasons,
                     selectedSeason = selectedSeason.value,
+                    seasonDownloadState = seasonDownloadState,
+                    onSeasonDownloadClick = { viewModel.downloadSeason(selectedSeason.value.episodes) },
                     onSelect = { selectedSeason.value = it }
                 )
                 EpisodeCarousel(