feat: also sync beat annotations to api, store beat annotations in Documents

app/src/main/java/at/lockstep/player/LockstepViewModel.kt

@@ -167,12 +167,13 @@ class LockstepViewModel(
         }
 
     /**
-     * Writes one JSON file under app files dir ([BeatAnnotationStorage]) for the track described
-     * by [event]. Skips when [beatTimesMs] is empty.
+     * Writes one JSON file under public Documents/Lockstep/{sessionFolder}/ for the track described
+     * by [event], records file metadata, and uploads when signed in. Skips when [beatTimesMs] is empty.
      */
     fun persistBeatAnnotation(
         playlistId: String,
         playlistDisplayName: String,
+        sessionFolder: String,
         event: TrackBoundaryEvent,
         beatTimesMs: List<Long>,
     ) {
@@ -183,15 +184,26 @@ class LockstepViewModel(
             val pairing = pairingDao.findForTrack(playlistId, event.trackId)
             val docId = BeatAnnotationStorage.mp3DocumentContentId(pairing?.localUri)
             val contentId = docId.ifBlank { event.trackId }
-            BeatAnnotationStorage.writeAnnotationsFile(
-                context = getApplication(),
-                playlistDisplayName = playlistDisplayName,
-                trackQueueIndex0Based = event.queueIndex,
-                contentId = contentId,
-                title = event.title,
-                artist = event.artist,
-                beatTimesMs = beatTimesMs,
-            )
+            val uri =
+                BeatAnnotationStorage.writeAnnotationsFile(
+                    context = getApplication(),
+                    sessionFolder = sessionFolder,
+                    playlistDisplayName = playlistDisplayName,
+                    trackQueueIndex0Based = event.queueIndex,
+                    contentId = contentId,
+                    title = event.title,
+                    artist = event.artist,
+                    beatTimesMs = beatTimesMs,
+                ) ?: return@launch
+            val entry =
+                FileMetadataEntity(
+                    fileUri = uri.toString(),
+                    trackId = event.trackId,
+                    type = FileMetadataEntity.TYPE_ANNOTATION,
+                    version = BuildConfig.VERSION_CODE,
+                )
+            val id = fileMetadataDao.insert(entry)
+            syncMetadataEntry(entry.copy(id = id))
         }
     }
 
@@ -299,7 +311,7 @@ class LockstepViewModel(
             }
             val failures = pending.count { entry -> !syncMetadataEntry(entry) }
             if (failures > 0) {
-                "Failed to sync $failures collection(s)"
+                "Failed to sync $failures file(s)"
             } else {
                 null
             }