Fix incorrect IDs in blurhash migration

lib/main.dart

@@ -93,11 +93,22 @@ void _setupJellyfinApiData() {
 
 Future<void> _setupDownloadsHelper() async {
   GetIt.instance.registerSingleton(DownloadsHelper());
+  final downloadsHelper = GetIt.instance<DownloadsHelper>();
+
+  // We awkwardly cache this value since going from 0.6.14 -> 0.6.16 will switch
+  // hasCompletedBlurhashImageMigration despite doing a fixed migration
+  final shouldRunBlurhashImageMigrationIdFix =
+      FinampSettingsHelper.finampSettings.shouldRunBlurhashImageMigrationIdFix;
 
   if (!FinampSettingsHelper.finampSettings.hasCompletedBlurhashImageMigration) {
-    await GetIt.instance<DownloadsHelper>().migrateBlurhashImages();
+    await downloadsHelper.migrateBlurhashImages();
     FinampSettingsHelper.setHasCompletedBlurhashImageMigration(true);
   }
+
+  if (shouldRunBlurhashImageMigrationIdFix) {
+    await downloadsHelper.fixBlurhashMigrationIds();
+    FinampSettingsHelper.setHasCompletedBlurhashImageMigrationIdFix(true);
+  }
 }
 
 Future<void> _setupDownloader() async {

lib/models/finamp_models.dart

@@ -87,6 +87,7 @@ class FinampSettings {
     required this.tabSortOrder,
     this.tabOrder = _tabOrder,
     this.hasCompletedBlurhashImageMigration = true,
+    this.hasCompletedBlurhashImageMigrationIdFix = true,
   });
 
   @HiveField(0)
@@ -176,6 +177,9 @@ class FinampSettings {
   @HiveField(23, defaultValue: false)
   bool hasCompletedBlurhashImageMigration;
 
+  @HiveField(24, defaultValue: false)
+  bool hasCompletedBlurhashImageMigrationIdFix;
+
   static Future<FinampSettings> create() async {
     final internalSongDir = await getInternalSongDir();
     final downloadLocation = DownloadLocation.create(
@@ -216,6 +220,10 @@ class FinampSettings {
   SortOrder getSortOrder(TabContentType tabType) {
     return tabSortOrder[tabType] ?? SortOrder.ascending;
   }
+
+  bool get shouldRunBlurhashImageMigrationIdFix =>
+      hasCompletedBlurhashImageMigration &&
+      !hasCompletedBlurhashImageMigrationIdFix;
 }
 
 /// Custom storage locations for storing music.

lib/services/downloads_helper.dart

@@ -936,6 +936,43 @@ class DownloadsHelper {
     _downloadsLogger.info("${imagesToDelete.length} duplicate images deleted.");
   }
 
+  Future<void> fixBlurhashMigrationIds() async {
+    _downloadsLogger.info("Fixing blurhash migration IDs from 0.6.15");
+
+    final List<DownloadedImage> images = [];
+
+    for (final image in downloadedImages) {
+      final item = getDownloadedSong(image.requiredBy.first) ??
+          getDownloadedParent(image.requiredBy.first);
+
+      if (item == null) {
+        // I should really use error enums when I rip this whole system out
+        throw "Failed to get item from image during blurhash migration fix!";
+      }
+
+      switch (item.runtimeType) {
+        case DownloadedSong:
+          image.id = (item as DownloadedSong).song.blurHash!;
+          break;
+        case DownloadedParent:
+          image.id = (item as DownloadedParent).item.blurHash!;
+          break;
+        default:
+          throw "Item was unexpected type! got ${item.runtimeType}. This really shouldn't happen...";
+      }
+
+      images.add(image);
+    }
+
+    await _downloadedImagesBox.clear();
+    await _downloadedImagesBox
+        .putAll(Map.fromEntries(images.map((e) => MapEntry(e.id, e))));
+
+    await _downloadedImageIdsBox.clear();
+    await _downloadedImageIdsBox.putAll(
+        Map.fromEntries(images.map((e) => MapEntry(e.downloadId, e.id))));
+  }
+
   Iterable<DownloadedSong> get downloadedItems => _downloadedItemsBox.values;
 
   Iterable<DownloadedImage> get downloadedImages => _downloadedImagesBox.values;

lib/services/finamp_settings_helper.dart

@@ -199,6 +199,15 @@ class FinampSettingsHelper {
         .put("FinampSettings", finampSettingsTemp);
   }
 
+  static void setHasCompletedBlurhashImageMigrationIdFix(
+      bool hasCompletedBlurhashImageMigrationIdFix) {
+    FinampSettings finampSettingsTemp = finampSettings;
+    finampSettingsTemp.hasCompletedBlurhashImageMigrationIdFix =
+        hasCompletedBlurhashImageMigrationIdFix;
+    Hive.box<FinampSettings>("FinampSettings")
+        .put("FinampSettings", finampSettingsTemp);
+  }
+
   static void setTabOrder(int index, TabContentType tabContentType) {
     FinampSettings finampSettingsTemp = finampSettings;
     finampSettingsTemp.tabOrder[index] = tabContentType;