Improve genre compatibility

Add a new range of Winamp 5.6+ genres to further improve compatibility with old genres.

app/build.gradle

@@ -28,6 +28,7 @@ android {
             applicationIdSuffix = '.debug'
             versionNameSuffix = "-DEBUG"
         }
+
         release {
             minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
@@ -62,7 +63,7 @@ dependencies {
 
     // General
     implementation 'androidx.core:core-ktx:1.3.2'
-    implementation 'androidx.activity:activity-ktx:1.3.0-alpha02'
+    implementation 'androidx.activity:activity-ktx:1.3.0-alpha03'
     implementation 'androidx.fragment:fragment-ktx:1.3.0'
 
     // Layout

app/src/main/java/org/oxycblt/auxio/music/Models.kt

@@ -26,11 +26,13 @@ sealed class Parent : BaseModel() {
 /**
  * The data object for a song. Inherits [BaseModel].
  * @property fileName The raw filename for this track
- * @property albumId  The Song's Album ID. Never use this outside of when attaching a song to its album.
+ * @property albumId  The Song's Album ID.
+ * Never use this outside of when attaching a song to its album.
  * @property track    The Song's Track number
  * @property duration The duration of the song, in millis.
  * @property album    The Song's parent album. Use this instead of [albumId].
- * @property genre    The Song's [Genre]
+ * @property genre    The Song's [Genre].
+ * These are not ensured to be linked due to possible quirks in the genre loading system.
  * @property seconds  The Song's duration in seconds
  * @property formattedDuration The Song's duration as a duration string.
  */
@@ -86,7 +88,8 @@ data class Album(
     private val mSongs = mutableListOf<Song>()
     val songs: List<Song> get() = mSongs
 
-    val totalDuration: String get() = songs.sumOf { it.seconds }.toDuration()
+    val totalDuration: String get() =
+        songs.sumOf { it.seconds }.toDuration()
 
     fun linkArtist(artist: Artist) {
         mArtist = artist
@@ -118,6 +121,8 @@ data class Artist(
     }
 
     val genre: Genre? by lazy {
+        // Get the genre that corresponds to the most songs in this artist, which would be
+        // the most "Prominent" genre.
         songs.groupBy { it.genre }.entries.maxByOrNull { it.value.size }?.key
     }
 
@@ -135,18 +140,15 @@ data class Genre(
     override val id: Long = -1,
     override val name: String,
 ) : Parent() {
-    val resolvedName: String by lazy {
-        if (name.contains(Regex("([1-9])"))) {
-            name.toNamedGenre() ?: name
-        } else {
-            name
-        }
-    }
-
     private val mSongs = mutableListOf<Song>()
     val songs: List<Song> get() = mSongs
 
-    val totalDuration: String get() = songs.sumOf { it.seconds }.toDuration()
+    val resolvedName: String by lazy {
+        name.getGenreNameCompat() ?: name
+    }
+
+    val totalDuration: String get() =
+        songs.sumOf { it.seconds }.toDuration()
 
     fun linkSong(song: Song) {
         mSongs.add(song)

app/src/main/java/org/oxycblt/auxio/music/MusicLoader.kt

@@ -191,8 +191,9 @@ class MusicLoader(private val context: Context) {
             artists.add(
                 // IDs are incremented from the minimum int value so that they remain unique.
                 Artist(
-                    id = (artists.size + Int.MIN_VALUE).toLong(),
-                    name = entry.key, albums = entry.value
+                    id = (Int.MIN_VALUE + artists.size).toLong(),
+                    name = entry.key,
+                    albums = entry.value
                 )
             )
         }

app/src/main/java/org/oxycblt/auxio/music/MusicStore.kt

@@ -84,9 +84,7 @@ class MusicStore private constructor() {
      * @return The corresponding [Song] for this [uri], null if there isnt one.
      */
     fun getSongForUri(uri: Uri, resolver: ContentResolver): Song? {
-        resolver.query(
-            uri, arrayOf(OpenableColumns.DISPLAY_NAME), null, null, null
-        )?.use { cursor ->
+        resolver.query(uri, arrayOf(OpenableColumns.DISPLAY_NAME), null, null, null)?.use { cursor ->
             cursor.moveToFirst()
             val fileName = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME))
 

app/src/main/java/org/oxycblt/auxio/music/MusicUtils.kt

@@ -7,6 +7,7 @@ import android.provider.MediaStore
 import android.text.format.DateUtils
 import android.widget.ImageButton
 import android.widget.TextView
+import androidx.core.text.isDigitsOnly
 import androidx.databinding.BindingAdapter
 import org.oxycblt.auxio.R
 import org.oxycblt.auxio.recycler.SortMode
@@ -17,6 +18,7 @@ import org.oxycblt.auxio.ui.getPlural
  * There are a lot more int-genre extensions as far as Im aware, but this works for most cases.
  */
 private val ID3_GENRES = arrayOf(
+    // ID3 Standard
     "Blues", "Classic Rock", "Country", "Dance", "Disco", "Funk", "Grunge", "Hip-Hop", "Jazz",
     "Metal", "New Age", "Oldies", "Other", "Pop", "R&B", "Rap", "Reggae", "Rock", "Techno",
     "Industrial", "Alternative", "Ska", "Death Metal", "Pranks", "Soundtrack", "Euro-Techno",
@@ -28,6 +30,7 @@ private val ID3_GENRES = arrayOf(
     "Cabaret", "New Wave", "Psychadelic", "Rave", "Showtunes", "Trailer", "Lo-Fi", "Tribal",
     "Acid Punk", "Acid Jazz", "Polka", "Retro", "Musical", "Rock & Roll", "Hard Rock",
 
+    // Winamp Extensions
     "Folk", "Folk-Rock", "National Folk", "Swing", "Fast Fusion", "Bebob", "Latin", "Revival",
     "Celtic", "Bluegrass", "Avantgarde", "Gothic Rock", "Progressive Rock", "Psychedelic Rock",
     "Symphonic Rock", "Slow Rock", "Big Band", "Chorus", "Easy Listening", "Acoustic", "Humour",
@@ -37,26 +40,41 @@ private val ID3_GENRES = arrayOf(
     "Euro-House", "Dance Hall", "Goa", "Drum & Bass", "Club-House", "Hardcore", "Terror", "Indie",
     "Britpop", "Negerpunk", "Polsk Punk", "Beat", "Christian Gangsta", "Heavy Metal", "Black Metal",
     "Crossover", "Contemporary Christian", "Christian Rock", "Merengue", "Salsa", "Thrash Metal",
-    "Anime", "JPop", "Synthpop"
-)
+    "Anime", "JPop", "Synthpop",
 
-private const val PAREN_FILTER = "()"
+    // Winamp 5.6+ extensions, used by EasyTAG and friends
+    "Abstract", "Art Rock", "Baroque", "Bhangra", "Big Beat", "Breakbeat", "Chillout", "Downtempo",
+    "Dub", "EBM", "Eclectic", "Electro", "Electroclash", "Emo", "Experimental", "Garage", "Global",
+    "IDM", "Illbient", "Industro-Goth", "Jam Band", "Krautrock", "Leftfield", "Lounge", "Math Rock", // S I X T Y   F I V E
+    "New Romantic", "Nu-Breakz", "Post-Punk", "Post-Rock", "Psytrance", "Shoegaze", "Space Rock",
+    "Trop Rock", "World Music", "Neoclassical", "Audiobook", "Audio Theatre", "Neue Deutsche Welle",
+    "Podcast", "Indie Rock", "G-Funk", "Dubstep", "Garage Rock", "Psybient"
+)
 
 // --- EXTENSION FUNCTIONS ---
 
 /**
- * Convert legacy ID3 genres to their named genre
- * @return The named genre for this legacy genre.
+ * Convert legacy int-based ID3 genres to their human-readable genre
+ * @return The named genre for this legacy genre, null if there is no need to parse it or if the genre is invalid.
  */
-fun String.toNamedGenre(): String? {
-    // Strip the genres of any parentheses, and convert it to an int
-    val intGenre = this.filterNot {
-        PAREN_FILTER.indexOf(it) > -1
-    }.toInt()
+fun String.getGenreNameCompat(): String? {
+    if (isDigitsOnly()) {
+        // ID3 v1, just parse as an integer
+        return ID3_GENRES.getOrNull(toInt())
+    }
 
-    // If the conversion fails [Due to the genre using an extension that Auxio doesn't have],
-    // then return null.
-    return ID3_GENRES.getOrNull(intGenre)
+    if (startsWith('(') && endsWith(')')) {
+        // ID3 v2+, parse out the parentheses and get the integer
+        // Any genres formatted as "(CHARS)" will be ignored.
+        val genreInt = substring(1 until lastIndex).toIntOrNull()
+
+        if (genreInt != null) {
+            return ID3_GENRES.getOrNull(genreInt)
+        }
+    }
+
+    // ID3 v3+, current name is fine.
+    return null
 }
 
 /**
@@ -92,7 +110,7 @@ fun Long.toDuration(): String {
  */
 fun Int.toYear(context: Context): String {
     return if (this > 0) {
-        this.toString()
+        toString()
     } else {
         context.getString(R.string.placeholder_no_date)
     }