downloads: address review on the cancel/progress rows

Name the cancel and delete buttons after the row so screen readers can
tell them apart, show an indeterminate bar when a running track has no
known total, and drop the no-op media refresh on cancel. Trim the dead
size alias and a redundant guard, and cover a queued row with no engine
id plus a failed track in the progress denominator.

app/src/main/kotlin/com/subtracks/data/db/DownloadDao.kt

@@ -107,7 +107,7 @@ interface DownloadDao {
     @Query(
         "SELECT d.sourceId AS sourceId, d.songId AS songId, s.title AS title, s.albumId AS albumId, al.name AS albumName, " +
             "al.artistId AS artistId, ar.name AS artistName, d.status AS status, " +
-            "d.bytes AS bytes, d.total AS total, d.total AS size " +
+            "d.bytes AS bytes, d.total AS total " +
             "FROM song_downloads d " +
             "JOIN songs s ON s.sourceId = d.sourceId AND s.id = d.songId " +
             "LEFT JOIN albums al ON al.sourceId = s.sourceId AND al.id = s.albumId " +

app/src/main/kotlin/com/subtracks/ui/downloads/DownloadsScreen.kt

@@ -262,11 +262,11 @@ private fun NodeRow(
         trailingContent = {
             if (progress != null) {
                 IconButton(onClick = onCancel) {
-                    Icon(Icons.Rounded.Close, contentDescription = "Cancel download")
+                    Icon(Icons.Rounded.Close, contentDescription = "Cancel download of $name")
                 }
             } else {
                 IconButton(onClick = onDelete) {
-                    Icon(Icons.Rounded.Delete, contentDescription = "Delete downloads")
+                    Icon(Icons.Rounded.Delete, contentDescription = "Delete downloads of $name")
                 }
             }
         },
@@ -280,7 +280,7 @@ private fun activeDownloads(songs: List<DownloadedSong>): List<DownloadedSong> =
 
 internal fun nodeProgress(songs: List<DownloadedSong>): Float? {
     val active = activeDownloads(songs)
-    if (active.isEmpty() || songs.isEmpty()) return null
+    if (active.isEmpty()) return null
     val completed = songs.count { it.status == DownloadStatus.Completed }
     val partial = active.sumOf { (it.progress ?: 0f).toDouble() }
     return ((completed + partial) / songs.size).toFloat().coerceIn(0f, 1f)
@@ -298,27 +298,30 @@ private fun SongRow(
         encoding = if (song.status == DownloadStatus.Completed) loadEncoding(song) else null
     }
     val active = song.status == DownloadStatus.Queued || song.status == DownloadStatus.Running
+    val barModifier = Modifier.fillMaxWidth().padding(top = 4.dp)
     ListItem(
         headlineContent = { Text(song.title, maxLines = 1, overflow = TextOverflow.Ellipsis) },
         supportingContent = {
             Column {
                 Text(songSubtitle(song, encoding), maxLines = 1, overflow = TextOverflow.Ellipsis)
                 if (active) {
-                    LinearProgressIndicator(
-                        progress = { song.progress ?: 0f },
-                        modifier = Modifier.fillMaxWidth().padding(top = 4.dp),
-                    )
+                    val progress = song.progress
+                    if (progress == null) {
+                        LinearProgressIndicator(modifier = barModifier)
+                    } else {
+                        LinearProgressIndicator(progress = { progress }, modifier = barModifier)
+                    }
                 }
             }
         },
         trailingContent = {
             if (active) {
                 IconButton(onClick = onCancel) {
-                    Icon(Icons.Rounded.Close, contentDescription = "Cancel download")
+                    Icon(Icons.Rounded.Close, contentDescription = "Cancel download of ${song.title}")
                 }
             } else {
                 IconButton(onClick = onDelete) {
-                    Icon(Icons.Rounded.Delete, contentDescription = "Delete download")
+                    Icon(Icons.Rounded.Delete, contentDescription = "Delete download of ${song.title}")
                 }
             }
         },

app/src/main/kotlin/com/subtracks/ui/downloads/DownloadsViewModel.kt

@@ -82,7 +82,6 @@ class DownloadsViewModel(
     fun cancelSongs(songIds: List<String>) {
         viewModelScope.launch {
             downloadRepository.cancel(sourceId.first(), songIds)
-            playbackController.refreshMediaItems()
         }
     }
 

app/src/test/kotlin/com/subtracks/ui/downloads/DownloadTreeTest.kt

@@ -58,6 +58,20 @@ class DownloadTreeTest {
         assertNull(nodeProgress(listOf(song("s3", "Three", "ar1", "Artist", "al1", "Album", size = 1))))
     }
 
+    @Test
+    fun nodeProgressCountsAFailedTrackInTheDenominator() {
+        val songs =
+            listOf(
+                song("s1", "One", "ar1", "Artist", "al1", "Album", size = 100),
+                song("s2", "Two", "ar1", "Artist", "al1", "Album", size = 100)
+                    .copy(status = DownloadStatus.Failed),
+                song("s3", "Three", "ar1", "Artist", "al1", "Album", size = 100)
+                    .copy(status = DownloadStatus.Running, bytes = 50, total = 100),
+            )
+
+        assertEquals(0.5f, nodeProgress(songs)!!, 0.0001f)
+    }
+
     private fun song(
         id: String,
         title: String,

app/src/test/kotlin/com/subtracks/ui/downloads/DownloadsScreenTest.kt

@@ -53,10 +53,10 @@ class DownloadsScreenTest {
             onCancel = { cancelled = it },
         )
 
-        composeRule.onAllNodesWithContentDescription("Cancel download").assertCountEquals(1)
-        composeRule.onAllNodesWithContentDescription("Delete downloads").assertCountEquals(1)
+        composeRule.onAllNodesWithContentDescription("Cancel download", substring = true).assertCountEquals(1)
+        composeRule.onAllNodesWithContentDescription("Delete downloads", substring = true).assertCountEquals(1)
 
-        composeRule.onNodeWithContentDescription("Cancel download").performClick()
+        composeRule.onNodeWithContentDescription("Cancel download of Active").performClick()
         assertEquals(listOf("s1"), cancelled)
     }
 
@@ -66,8 +66,8 @@ class DownloadsScreenTest {
 
         expandArtistAndAlbum()
 
-        composeRule.onAllNodesWithContentDescription("Cancel download").assertCountEquals(3)
-        composeRule.onAllNodesWithContentDescription("Delete download").assertCountEquals(1)
+        composeRule.onAllNodesWithContentDescription("Cancel download", substring = true).assertCountEquals(3)
+        composeRule.onAllNodesWithContentDescription("Delete download of Done").assertCountEquals(1)
     }
 
     private fun artist(

app/src/test/kotlin/com/subtracks/ui/downloads/DownloadsViewModelTest.kt

@@ -150,6 +150,17 @@ class DownloadsViewModelTest {
         assertNotNull("a completed download should survive a cancel", row("s2"))
     }
 
+    @Test
+    fun cancelSongsRemovesAQueuedDownloadWithoutAnEngineId() {
+        seedDownloads()
+        runBlocking { db.downloadDao().upsert(SongDownload(sourceId, "s1", DownloadStatus.Queued, engineId = null)) }
+
+        viewModel.cancelSongs(listOf("s1"))
+        await { row("s1") == null }
+
+        assertNull(row("s1"))
+    }
+
     private fun seedDownloads() {
         sourceId =
             runBlocking {