home: show album more screens as lists with a section-relevant detail column

app/src/main/kotlin/com/subtracks/ui/home/HomeListScreen.kt

@@ -2,11 +2,19 @@ package com.subtracks.ui.home
 
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.combinedClickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.rounded.ArrowBack
 import androidx.compose.material3.ExperimentalMaterial3Api
@@ -14,13 +22,18 @@ import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.ListItem
 import androidx.compose.material3.ListItemDefaults
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.paging.LoadState
@@ -35,10 +48,10 @@ import com.subtracks.data.model.Song
 import com.subtracks.data.source.StarType
 import com.subtracks.playback.PlaybackController
 import com.subtracks.ui.components.ContextMenuHost
+import com.subtracks.ui.components.CoverArt
 import com.subtracks.ui.components.ItemActions
 import com.subtracks.ui.components.LoadingState
 import com.subtracks.ui.components.MenuTarget
-import com.subtracks.ui.library.AlbumsContent
 import com.subtracks.ui.library.ArtistsContent
 import com.subtracks.ui.library.SongRow
 import org.koin.compose.koinInject
@@ -112,6 +125,7 @@ fun HomeListScreen(
     onDecadeClick: (Long) -> Unit = {},
     modifier: Modifier = Modifier,
 ) {
+    val now = remember { System.currentTimeMillis() }
     Scaffold(
         modifier = modifier,
         topBar = {
@@ -182,10 +196,10 @@ fun HomeListScreen(
                         modifier = Modifier.padding(padding),
                     )
                 } else {
-                    AlbumsContent(
+                    AlbumsList(
-                        items = albums,
+                        albums = albums,
                         coverArt = coverArt,
-                        bottomInset = 0.dp,
+                        info = { albumListInfo(request, it, now) },
                         onAlbumClick = onAlbumClick,
                         onLongClick = onLongClick,
                         modifier = Modifier.padding(padding),
@@ -250,3 +264,140 @@ private fun SongsList(
         }
     }
 }
+
+private val ALBUM_ROW_COVER = 48.dp
+
+@Composable
+private fun AlbumsList(
+    albums: LazyPagingItems<Album>,
+    coverArt: (String?, Boolean) -> CoverArtRef?,
+    info: (Album) -> String?,
+    onAlbumClick: (Album) -> Unit,
+    onLongClick: (MenuTarget) -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    if (albums.itemCount == 0 && albums.loadState.refresh is LoadState.Loading) {
+        LoadingState(modifier)
+        return
+    }
+    LazyColumn(
+        modifier = modifier.fillMaxSize(),
+        contentPadding = PaddingValues(bottom = 24.dp),
+    ) {
+        items(count = albums.itemCount, key = albums.itemKey { it.id }) { index ->
+            val album = albums[index]
+            if (album != null) {
+                AlbumListRow(
+                    album = album,
+                    coverArt = coverArt,
+                    info = info(album),
+                    onClick = { onAlbumClick(album) },
+                    onLongClick = { onLongClick(MenuTarget.Album(album, coverArt(album.coverArt, true))) },
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun AlbumListRow(
+    album: Album,
+    coverArt: (String?, Boolean) -> CoverArtRef?,
+    info: String?,
+    onClick: () -> Unit,
+    onLongClick: () -> Unit,
+) {
+    Row(
+        modifier =
+            Modifier
+                .fillMaxWidth()
+                .combinedClickable(onClick = onClick, onLongClick = onLongClick)
+                .padding(horizontal = 16.dp, vertical = 8.dp),
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        CoverArt(
+            ref = coverArt(album.coverArt, true),
+            name = album.name,
+            modifier = Modifier.size(ALBUM_ROW_COVER).clip(RoundedCornerShape(2.dp)),
+        )
+        Spacer(Modifier.width(12.dp))
+        Column(Modifier.weight(1f), verticalArrangement = Arrangement.spacedBy(2.dp)) {
+            Text(
+                text = album.name,
+                style = MaterialTheme.typography.bodyLarge,
+                maxLines = 1,
+                overflow = TextOverflow.Ellipsis,
+            )
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Text(
+                    text = album.albumArtist.orEmpty(),
+                    style = MaterialTheme.typography.bodyMedium,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    maxLines = 1,
+                    overflow = TextOverflow.Ellipsis,
+                    modifier = Modifier.weight(1f),
+                )
+                if (info != null) {
+                    Text(
+                        text = info,
+                        style = MaterialTheme.typography.bodyMedium,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        maxLines = 1,
+                        modifier = Modifier.padding(start = 8.dp),
+                    )
+                }
+            }
+        }
+    }
+}
+
+internal fun albumListInfo(
+    request: HomeListRequest,
+    album: Album,
+    now: Long,
+): String? =
+    when {
+        request.section == HomeSection.RecentlyAddedAlbums -> {
+            relativeTimeLabel(album.created, now)
+        }
+
+        request.section == HomeSection.RecentlyPlayedAlbums || request.section == HomeSection.Rediscover -> {
+            album.played?.let { relativeTimeLabel(it, now) }
+        }
+
+        request.section == HomeSection.MostPlayedAlbums -> {
+            playCountLabel(album.playCount)
+        }
+
+        request.decade != null -> {
+            album.year?.takeIf { it > 0 }?.toString()
+        }
+
+        else -> {
+            null
+        }
+    }
+
+private fun playCountLabel(count: Long): String? = if (count <= 0L) null else "$count ${if (count == 1L) "play" else "plays"}"
+
+internal fun relativeTimeLabel(
+    epochSeconds: Long,
+    nowMillis: Long,
+): String? {
+    if (epochSeconds <= 0L) return null
+    val elapsedMillis = nowMillis - epochSeconds * 1000L
+    if (elapsedMillis < 0L) return "Just now"
+    val days = elapsedMillis / 86_400_000L
+    return when {
+        elapsedMillis < 60_000L -> "Just now"
+        days == 0L -> "Today"
+        days == 1L -> "Yesterday"
+        days < 7L -> "$days days ago"
+        days < 14L -> "Last week"
+        days < 30L -> "${days / 7L} weeks ago"
+        days < 60L -> "Last month"
+        days < 365L -> "${days / 30L} months ago"
+        days < 730L -> "Last year"
+        else -> "${days / 365L} years ago"
+    }
+}

app/src/test/kotlin/com/subtracks/ui/home/HomeListInfoTest.kt

@@ -0,0 +1,76 @@
+package com.subtracks.ui.home
+
+import com.subtracks.data.model.Album
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Test
+
+class HomeListInfoTest {
+    private val now = 1_700_000_000_000L
+
+    @Test
+    fun relativeTimeUsesFriendlyBuckets() {
+        assertNull(relativeTimeLabel(0, now))
+        assertEquals("Just now", relativeTimeLabel(now / 1000 - 10, now))
+        assertEquals("Today", relativeTimeLabel((now - 3 * 3_600_000L) / 1000L, now))
+        assertEquals("Yesterday", relativeTimeLabel(secondsAgo(1), now))
+        assertEquals("3 days ago", relativeTimeLabel(secondsAgo(3), now))
+        assertEquals("Last week", relativeTimeLabel(secondsAgo(10), now))
+        assertEquals("3 weeks ago", relativeTimeLabel(secondsAgo(21), now))
+        assertEquals("Last month", relativeTimeLabel(secondsAgo(45), now))
+        assertEquals("3 months ago", relativeTimeLabel(secondsAgo(100), now))
+        assertEquals("Last year", relativeTimeLabel(secondsAgo(400), now))
+        assertEquals("2 years ago", relativeTimeLabel(secondsAgo(800), now))
+    }
+
+    @Test
+    fun albumInfoMatchesTheSection() {
+        val album = album(created = secondsAgo(1), played = secondsAgo(3), playCount = 5, year = 1999)
+
+        assertEquals("Yesterday", albumListInfo(request(HomeSection.RecentlyAddedAlbums), album, now))
+        assertEquals("3 days ago", albumListInfo(request(HomeSection.RecentlyPlayedAlbums), album, now))
+        assertEquals("5 plays", albumListInfo(request(HomeSection.MostPlayedAlbums), album, now))
+        assertEquals("3 days ago", albumListInfo(request(HomeSection.Rediscover), album, now))
+    }
+
+    @Test
+    fun albumInfoIsNullWhenTheSectionHasNothingToShow() {
+        val album = album(created = 0, played = null, playCount = 0, year = 0)
+
+        assertNull(albumListInfo(request(HomeSection.RecentlyAddedAlbums), album, now))
+        assertNull(albumListInfo(request(HomeSection.RecentlyPlayedAlbums), album, now))
+        assertNull(albumListInfo(request(HomeSection.MostPlayedAlbums), album, now))
+    }
+
+    @Test
+    fun aDecadeListShowsTheYear() {
+        val album = album(created = 0, played = null, playCount = 0, year = 1999)
+
+        assertEquals("1999", albumListInfo(HomeListRequest(title = "1990s", decade = 1990), album, now))
+    }
+
+    private fun secondsAgo(days: Long): Long = (now - days * 86_400_000L) / 1000L
+
+    private fun request(section: HomeSection) = HomeListRequest(title = section.title, section = section)
+
+    private fun album(
+        created: Long,
+        played: Long?,
+        playCount: Long,
+        year: Long,
+    ) = Album(
+        sourceId = 1,
+        id = "a",
+        artistId = "ar",
+        name = "Album",
+        albumArtist = "Artist",
+        created = created,
+        coverArt = null,
+        genre = null,
+        year = year,
+        starred = null,
+        songCount = 1,
+        playCount = playCount,
+        played = played,
+    )
+}

app/src/test/kotlin/com/subtracks/ui/home/HomeScreenshotTest.kt

@@ -3,12 +3,15 @@ package com.subtracks.ui.home
 import androidx.activity.ComponentActivity
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.material3.Surface
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.test.junit4.v2.createAndroidComposeRule
 import androidx.compose.ui.test.onAllNodesWithText
 import androidx.compose.ui.test.onRoot
 import androidx.compose.ui.test.performTouchInput
 import androidx.compose.ui.test.swipeUp
+import androidx.paging.PagingData
+import androidx.paging.compose.collectAsLazyPagingItems
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.github.takahirom.roborazzi.RobolectricDeviceQualifiers
 import com.github.takahirom.roborazzi.captureRoboImage
@@ -17,6 +20,7 @@ import com.subtracks.data.model.AlbumSongItem
 import com.subtracks.data.model.Artist
 import com.subtracks.data.model.Song
 import com.subtracks.ui.theme.SubtracksTheme
+import kotlinx.coroutines.flow.flowOf
 import org.junit.Rule
 import org.junit.Test
 import org.junit.runner.RunWith
@@ -75,6 +79,49 @@ class HomeScreenshotTest {
         composeRule.onRoot().captureRoboImage("src/test/screenshots/home_genres.png")
     }
 
+    @Test
+    fun homeRecentlyAddedList() {
+        val now = System.currentTimeMillis()
+        val albums =
+            listOf(
+                listAlbum("Added Yesterday", (now - 86_400_000L) / 1000L),
+                listAlbum("Added This Week", (now - 3 * 86_400_000L) / 1000L),
+                listAlbum("Added Weeks Ago", (now - 21 * 86_400_000L) / 1000L),
+            )
+        composeRule.setContent {
+            SubtracksTheme {
+                HomeListScreen(
+                    request = HomeListRequest(title = "Recently added", section = HomeSection.RecentlyAddedAlbums),
+                    albums = remember { flowOf(PagingData.from(albums)) }.collectAsLazyPagingItems(),
+                    artists = remember { flowOf(PagingData.empty<Artist>()) }.collectAsLazyPagingItems(),
+                    songs = remember { flowOf(PagingData.empty<AlbumSongItem>()) }.collectAsLazyPagingItems(),
+                    coverArt = { _, _ -> null },
+                )
+            }
+        }
+        composeRule.waitUntil(timeoutMillis = 5_000) {
+            composeRule.onAllNodesWithText("Added Yesterday").fetchSemanticsNodes().isNotEmpty()
+        }
+        composeRule.onRoot().captureRoboImage("src/test/screenshots/home_album_list.png")
+    }
+
+    private fun listAlbum(
+        name: String,
+        created: Long,
+    ) = Album(
+        sourceId = 1,
+        id = name,
+        artistId = "ar",
+        name = name,
+        albumArtist = "Radiohead",
+        created = created,
+        coverArt = null,
+        genre = null,
+        year = 2000,
+        starred = null,
+        songCount = 10,
+    )
+
     private fun feed() =
         HomeFeed(
             recentlyPlayedAlbums = albums("Recent"),