metadata: theme each screenshot and show the miniplayer

Use a different album for the now-playing and album screens (Chillhop Winter,
My latin way) so the store shots show distinct colour schemes, tint the home
screen with the playing album so the logo pops, and render the miniplayer on
the albums, album, artists and search screens. Search now runs "chill".

The generator stages the sync into an on-disk database and caches cover bytes
under the temp dir, and only fetches full-resolution art for the covers shown
large; grid art uses the thumbnail endpoint.

app/src/test/kotlin/com/subtracks/ui/DemoScreenshotTest.kt

@@ -5,6 +5,7 @@ import android.graphics.Bitmap
 import android.graphics.BitmapFactory
 import android.graphics.Color
 import androidx.activity.ComponentActivity
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material3.Surface
 import androidx.compose.runtime.Composable
@@ -12,6 +13,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.test.junit4.v2.createAndroidComposeRule
 import androidx.compose.ui.test.onRoot
@@ -50,6 +52,7 @@ import com.subtracks.ui.library.ArtistDetailScreen
 import com.subtracks.ui.library.LibraryScreen
 import com.subtracks.ui.library.LibraryTab
 import com.subtracks.ui.library.sortOptionsFor
+import com.subtracks.ui.playback.MiniPlayer
 import com.subtracks.ui.playback.NowPlayingScreen
 import com.subtracks.ui.theme.ArtworkColors
 import com.subtracks.ui.theme.ArtworkTheme
@@ -67,6 +70,7 @@ import org.junit.Test
 import org.junit.runner.RunWith
 import org.robolectric.annotation.Config
 import org.robolectric.annotation.GraphicsMode
+import java.io.File
 
 /**
  * Records the store screenshots from a real sync of the public Navidrome demo library. It is not run
@@ -123,9 +127,9 @@ class DemoScreenshotTest {
                             NowPlayingScreen(
                                 state = demo.playbackState,
                                 positionMs = demo.positionMs,
-                                title = demo.album.name,
+                                title = demo.nowPlayingAlbum.name,
-                                coverArt = demo.coverArt(demo.album.coverArt, false),
+                                coverArt = demo.coverArt(demo.nowPlayingAlbum.coverArt, false),
-                                artwork = demo.artwork(demo.album.coverArt),
+                                artwork = demo.artwork(demo.nowPlayingAlbum.coverArt),
                                 onBack = {},
                                 onQueue = {},
                                 onPlayPause = {},
@@ -137,10 +141,14 @@ class DemoScreenshotTest {
                         }
 
                         Screen.Albums -> {
+                            Box(Modifier.fillMaxSize()) {
                                 AlbumsScreen(demo.albums, demo.coverArt, demo.artwork(demo.albums.first().coverArt))
+                                demo.MiniPlayerOverlay(Modifier.align(Alignment.BottomCenter))
+                            }
                         }
 
                         Screen.AlbumDetail -> {
+                            Box(Modifier.fillMaxSize()) {
                                 AlbumDetailScreen(
                                     album = demo.album,
                                     songs = demo.albumSongs,
@@ -148,9 +156,11 @@ class DemoScreenshotTest {
                                     artwork = demo.artwork(demo.album.coverArt),
                                     onBack = {},
                                     onSongClick = {},
-                                playingSongId = demo.song.id,
+                                    playingSongId = demo.nowPlayingSong.id,
                                     modifier = Modifier.fillMaxSize(),
                                 )
+                                demo.MiniPlayerOverlay(Modifier.align(Alignment.BottomCenter))
+                            }
                         }
 
                         Screen.ArtistDetail -> {
@@ -168,6 +178,7 @@ class DemoScreenshotTest {
                         }
 
                         Screen.Artists -> {
+                            Box(Modifier.fillMaxSize()) {
                                 LibraryScreen(
                                     selectedTab = LibraryTab.Artists,
                                     onTabSelected = {},
@@ -183,9 +194,12 @@ class DemoScreenshotTest {
                                     artwork = demo.artwork(demo.artists.first().coverArt),
                                     modifier = Modifier.fillMaxSize(),
                                 )
+                                demo.MiniPlayerOverlay(Modifier.align(Alignment.BottomCenter))
+                            }
                         }
 
                         Screen.Search -> {
+                            Box(Modifier.fillMaxSize()) {
                                 LibraryScreen(
                                     selectedTab = LibraryTab.Albums,
                                     onTabSelected = {},
@@ -206,6 +220,8 @@ class DemoScreenshotTest {
                                     artwork = demo.artwork(demo.searchAlbums.first().coverArt),
                                     modifier = Modifier.fillMaxSize(),
                                 )
+                                demo.MiniPlayerOverlay(Modifier.align(Alignment.BottomCenter))
+                            }
                         }
                     }
                 }
@@ -259,13 +275,28 @@ class DemoScreenshotTest {
         composeRule.onRoot().captureRoboImage("src/test/screenshots/demo/$file")
     }
 
+    @Composable
+    private fun DemoData.MiniPlayerOverlay(modifier: Modifier = Modifier) {
+        MiniPlayer(
+            state = playbackState,
+            positionMs = positionMs,
+            coverArt = coverArt(nowPlayingAlbum.coverArt, true),
+            artwork = artwork(nowPlayingAlbum.coverArt),
+            onExpand = {},
+            onPlayPause = {},
+            onNext = {},
+            modifier = modifier,
+        )
+    }
+
     private enum class Screen { Home, NowPlaying, Albums, AlbumDetail, ArtistDetail, Artists, Search }
 
     private class DemoData(
         val albums: List<Album>,
         val artists: List<Artist>,
         val feed: HomeFeed,
-        val song: Song,
+        val nowPlayingSong: Song,
+        val nowPlayingAlbum: Album,
         val album: Album,
         val albumSongs: List<Song>,
         val homePlayingAlbum: Album,
@@ -281,19 +312,19 @@ class DemoScreenshotTest {
             PlaybackState(
                 item =
                     QueueItem(
-                        id = song.id,
+                        id = nowPlayingSong.id,
-                        title = song.title,
+                        title = nowPlayingSong.title,
-                        artist = song.artist,
+                        artist = nowPlayingSong.artist,
-                        album = song.album,
+                        album = nowPlayingSong.album,
-                        coverArtId = album.coverArt,
+                        coverArtId = nowPlayingAlbum.coverArt,
                     ),
                 isPlaying = true,
-                durationMs = (song.duration ?: 0) * 1000,
+                durationMs = (nowPlayingSong.duration ?: 0) * 1000,
                 hasNext = true,
                 hasPrevious = false,
             )
 
-        val positionMs: Long = (song.duration ?: 0) * 1000 * 35 / 100
+        val positionMs: Long = (nowPlayingSong.duration ?: 0) * 1000 * 35 / 100
 
         fun artwork(coverArtId: String?): ArtworkColors {
             val bitmap = coverArtId?.let(bitmaps::get) ?: return artworkColorsFromSeeds(FALLBACK_SEED, null)
@@ -326,9 +357,10 @@ class DemoScreenshotTest {
                         )
                     val source: SubsonicSource = TestServers.source(server)
 
+                    context.deleteDatabase(DEMO_DB_NAME)
                     val db =
                         Room
-                            .inMemoryDatabaseBuilder(context, SubtracksDatabase::class.java)
+                            .databaseBuilder<SubtracksDatabase>(context, DEMO_DB_NAME)
                             .setDriver(BundledSQLiteDriver())
                             .build()
                     db.sourcesDao().upsertSource(
@@ -341,9 +373,11 @@ class DemoScreenshotTest {
                     val artists = dao.artistIds(1).mapNotNull { dao.artist(1, it).first() }
                     val playlists = dao.playlistIds(1).mapNotNull { dao.playlist(1, it).first() }
 
-                    val album = albums.firstOrNull { it.name == "Future, Sex, Computers" } ?: albums.first()
+                    val nowPlayingAlbum = albums.firstOrNull { it.name == "Chillhop Essentials - Winter 2016" } ?: albums.first()
+                    val nowPlayingSongs = dao.songsByAlbum(1, nowPlayingAlbum.id).first()
+                    val nowPlayingSong = nowPlayingSongs.getOrNull(1) ?: nowPlayingSongs.first()
+                    val album = albums.firstOrNull { it.name == "My latin way" } ?: albums.first()
                     val albumSongs = dao.songsByAlbum(1, album.id).first()
-                    val song = albumSongs.getOrNull(1) ?: albumSongs.first()
                     val homePlayingAlbum = albums.firstOrNull { it.name == "Shaking The Habitual" } ?: albums.last()
                     val homePlayingSong = dao.songsByAlbum(1, homePlayingAlbum.id).first().first()
                     val artist =
@@ -376,15 +410,27 @@ class DemoScreenshotTest {
                             .filterNotNull()
                             .distinct()
 
+                    val fullSizeIds =
+                        buildSet {
+                            addAll(listOfNotNull(album.coverArt, nowPlayingAlbum.coverArt, artist.coverArt))
+                            artistAlbums.mapNotNullTo(this) { it.coverArt }
+                        }
+
                     val bitmaps = mutableMapOf<String, Bitmap>()
                     val builder = FakeImageLoaderEngine.Builder()
+                    val coverDir = DEMO_COVER_DIR.apply { mkdirs() }
                     coverArtIds.forEach { id ->
-                        val bitmap = fetchBitmap(http, source, id) ?: return@forEach
+                        val thumbnail = fetchBitmap(http, source, id, thumbnail = true, coverDir) ?: return@forEach
-                        bitmaps[id] = bitmap
+                        source.coverArtUri(id, true)?.let { builder.intercept(it.toString(), thumbnail.asImage()) }
-                        val image = bitmap.asImage()
+                        val image =
-                        listOf(false, true).forEach { thumbnail ->
+                            if (id in fullSizeIds) {
-                            source.coverArtUri(id, thumbnail)?.let { builder.intercept(it.toString(), image) }
+                                (fetchBitmap(http, source, id, thumbnail = false, coverDir) ?: thumbnail).also {
+                                    bitmaps[id] = it
                                 }
+                            } else {
+                                thumbnail.also { bitmaps[id] = it }
+                            }
+                        source.coverArtUri(id, false)?.let { builder.intercept(it.toString(), image.asImage()) }
                     }
                     val fallback =
                         Bitmap
@@ -406,7 +452,8 @@ class DemoScreenshotTest {
                         albums = albums,
                         artists = artists,
                         feed = feed,
-                        song = song,
+                        nowPlayingSong = nowPlayingSong,
+                        nowPlayingAlbum = nowPlayingAlbum,
                         album = album,
                         albumSongs = albumSongs,
                         homePlayingAlbum = homePlayingAlbum,
@@ -424,16 +471,62 @@ class DemoScreenshotTest {
                 http: OkHttpClient,
                 source: SubsonicSource,
                 id: String,
+                thumbnail: Boolean,
+                coverDir: File,
             ): Bitmap? =
                 try {
-                    val url = source.coverArtUri(id, false) ?: return null
+                    val url = source.coverArtUri(id, thumbnail) ?: return null
-                    val bytes = http.newCall(Request.Builder().url(url).build()).execute().use { it.body.bytes() }
+                    val file = File(coverDir, "${url.hashCode().toUInt().toString(16)}.img")
+                    if (!file.exists()) {
+                        http.newCall(Request.Builder().url(url).build()).execute().use { response ->
+                            response.body.byteStream().use { input ->
+                                file.outputStream().use { output -> input.copyTo(output) }
+                            }
+                        }
+                    }
+                    val bytes = file.readBytes()
+                    if (thumbnail) {
                         BitmapFactory.decodeByteArray(bytes, 0, bytes.size)
+                    } else {
+                        decodeDownsampled(bytes, MAX_ART_DIM)
+                    }
                 } catch (_: Exception) {
                     null
                 }
+
+            private fun decodeDownsampled(
+                bytes: ByteArray,
+                maxDim: Int,
+            ): Bitmap? {
+                val bounds = BitmapFactory.Options().apply { inJustDecodeBounds = true }
+                BitmapFactory.decodeByteArray(bytes, 0, bytes.size, bounds)
+                var sample = 1
+                while (maxOf(bounds.outWidth, bounds.outHeight) / (sample * 2) >= maxDim) sample *= 2
+                val decoded =
+                    BitmapFactory.decodeByteArray(
+                        bytes,
+                        0,
+                        bytes.size,
+                        BitmapFactory.Options().apply { inSampleSize = sample },
+                    ) ?: return null
+                val largest = maxOf(decoded.width, decoded.height)
+                if (largest <= maxDim) return decoded
+                val scale = maxDim.toFloat() / largest
+                val scaled =
+                    Bitmap.createScaledBitmap(
+                        decoded,
+                        (decoded.width * scale).toInt().coerceAtLeast(1),
+                        (decoded.height * scale).toInt().coerceAtLeast(1),
+                        true,
+                    )
+                if (scaled !== decoded) decoded.recycle()
+                return scaled
+            }
         }
     }
 }
 
 private const val DEMO_SEARCH = "chill"
+private const val MAX_ART_DIM = 1200
+private const val DEMO_DB_NAME = "demo-screens.db"
+private val DEMO_COVER_DIR = File(System.getProperty("java.io.tmpdir"), "subtracks-demo-covers")