music: introduce siloed covers

Will allow me to dynamically configure cover quality by user settings.

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

@@ -28,6 +28,8 @@ import kotlinx.coroutines.Job
 import kotlinx.coroutines.withContext
 import kotlinx.coroutines.yield
 import org.oxycblt.auxio.music.MusicRepository.IndexingWorker
+import org.oxycblt.auxio.music.covers.CoverSilo
+import org.oxycblt.auxio.music.covers.SiloedCovers
 import org.oxycblt.musikr.IndexingProgress
 import org.oxycblt.musikr.Interpretation
 import org.oxycblt.musikr.Library
@@ -38,6 +40,7 @@ import org.oxycblt.musikr.Playlist
 import org.oxycblt.musikr.Song
 import org.oxycblt.musikr.Storage
 import org.oxycblt.musikr.cache.StoredCache
+import org.oxycblt.musikr.cover.CoverParams
 import org.oxycblt.musikr.playlist.db.StoredPlaylists
 import org.oxycblt.musikr.tag.interpret.Naming
 import org.oxycblt.musikr.tag.interpret.Separators
@@ -385,7 +388,7 @@ constructor(
         val currentRevision = musicSettings.revision
         val newRevision = currentRevision?.takeIf { withCache } ?: UUID.randomUUID()
         val cache = if (withCache) storedCache.visible() else storedCache.invisible()
-        val covers = RevisionedCovers.at(context, newRevision)
+        val covers = SiloedCovers.at(context, CoverSilo(newRevision, CoverParams.of(750, 80)))
         val storage = Storage(cache, covers, storedPlaylists)
         val interpretation = Interpretation(nameFactory, separators)
 

app/src/main/java/org/oxycblt/auxio/music/covers/SiloedCovers.kt

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2024 Auxio Project
- * RevisionedCovers.kt is part of Auxio.
+ * SiloedCovers.kt is part of Auxio.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -16,7 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
  
-package org.oxycblt.auxio.music
+package org.oxycblt.auxio.music.covers
 
 import android.content.Context
 import java.io.File
@@ -31,19 +31,19 @@ import org.oxycblt.musikr.cover.CoverParams
 import org.oxycblt.musikr.cover.MutableStoredCovers
 import org.oxycblt.musikr.cover.StoredCovers
 
-class RevisionedCovers(
+class SiloedCovers(
     private val rootDir: File,
-    private val revision: UUID,
+    private val silo: CoverSilo,
     private val inner: MutableStoredCovers
 ) : MutableStoredCovers {
-    override suspend fun obtain(id: String): RevisionedCover? {
-        val (coverId, coverRevision) = parse(id) ?: return null
-        if (coverRevision != revision) return null
-        return inner.obtain(coverId)?.let { RevisionedCover(revision, it) }
+    override suspend fun obtain(id: String): SiloedCover? {
+        val coverId = SiloedCoverId.parse(id) ?: return null
+        if (coverId.silo != silo) return null
+        return inner.obtain(coverId.id)?.let { SiloedCover(coverId.silo, it) }
     }
 
-    override suspend fun write(data: ByteArray): RevisionedCover? {
-        return inner.write(data)?.let { RevisionedCover(revision, it) }
+    override suspend fun write(data: ByteArray): SiloedCover? {
+        return inner.write(data)?.let { SiloedCover(silo, it) }
     }
 
     override suspend fun cleanup(assuming: Library) {
@@ -51,37 +51,57 @@ class RevisionedCovers(
 
         // Destroy old revisions no longer being used.
         withContext(Dispatchers.IO) {
-            val exclude = revision.toString()
+            val exclude = silo.toString()
             rootDir.listFiles { file -> file.name != exclude }?.forEach { it.deleteRecursively() }
         }
     }
 
     companion object {
-        suspend fun at(context: Context, revision: UUID): RevisionedCovers {
+        suspend fun at(context: Context, silo: CoverSilo): SiloedCovers {
             val rootDir: File
             val revisionDir: File
             withContext(Dispatchers.IO) {
                 rootDir = context.filesDir.resolve("covers").apply { mkdirs() }
-                revisionDir = rootDir.resolve(revision.toString()).apply { mkdirs() }
+                revisionDir = rootDir.resolve(silo.toString()).apply { mkdirs() }
             }
             val files = CoverFiles.at(revisionDir)
-            val format = CoverFormat.jpeg(CoverParams.of(750, 80))
-            return RevisionedCovers(rootDir, revision, StoredCovers.from(files, format))
-        }
-
-        private fun parse(id: String): Pair<String, UUID>? {
-            val split = id.split('@', limit = 2)
-            if (split.size != 2) return null
-            val (coverId, coverRevisionStr) = split
-            val coverRevision = coverRevisionStr.toUuidOrNull() ?: return null
-            return coverId to coverRevision
+            val format = CoverFormat.jpeg(silo.params)
+            return SiloedCovers(rootDir, silo, StoredCovers.from(files, format))
         }
     }
 }
 
-class RevisionedCover(private val revision: UUID, val inner: Cover) : Cover by inner {
-    override val id: String
-        get() = "${inner.id}@${revision}"
+data class CoverSilo(val revision: UUID, val params: CoverParams) {
+    override fun toString() = "${revision}.${params.resolution}.${params.quality}"
+
+    companion object {
+        fun parse(silo: String): CoverSilo? {
+            val parts = silo.split('.')
+            if (parts.size != 3) return null
+            val revision = parts[0].toUuidOrNull() ?: return null
+            val resolution = parts[1].toIntOrNull() ?: return null
+            val quality = parts[2].toIntOrNull() ?: return null
+            return CoverSilo(revision, CoverParams.of(resolution, quality))
+        }
+    }
+}
+
+class SiloedCover(silo: CoverSilo, private val innerCover: Cover) : Cover by innerCover {
+    private val innerId = SiloedCoverId(silo, innerCover.id)
+    override val id = innerId.toString()
+}
+
+data class SiloedCoverId(val silo: CoverSilo, val id: String) {
+    override fun toString() = "$id@$silo"
+
+    companion object {
+        fun parse(id: String): SiloedCoverId? {
+            val parts = id.split('@')
+            if (parts.size != 2) return null
+            val silo = CoverSilo.parse(parts[1]) ?: return null
+            return SiloedCoverId(silo, parts[0])
+        }
+    }
 }
 
 private fun String.toUuidOrNull(): UUID? =

musikr/src/main/java/org/oxycblt/musikr/cover/CoverParams.kt

@@ -18,7 +18,7 @@
  
 package org.oxycblt.musikr.cover
 
-class CoverParams private constructor(internal val resolution: Int, internal val quality: Int) {
+class CoverParams private constructor(val resolution: Int, val quality: Int) {
     companion object {
         fun of(resolution: Int, quality: Int): CoverParams {
             check(resolution > 0) { "Resolution must be positive" }