fix(mobile): respect orientation on displaying asset dimensions

mobile/lib/entities/asset.entity.dart

@@ -22,8 +22,8 @@ class Asset {
         durationInSeconds = remote.duration.toDuration()?.inSeconds ?? 0,
         type = remote.type.toAssetType(),
         fileName = remote.originalFileName,
-        height = remote.exifInfo?.exifImageHeight?.toInt(),
-        width = remote.exifInfo?.exifImageWidth?.toInt(),
+        height = isFlipped(remote) ? remote.exifInfo?.exifImageWidth?.toInt() : remote.exifInfo?.exifImageHeight?.toInt(),
+        width = isFlipped(remote) ? remote.exifInfo?.exifImageHeight?.toInt() : remote.exifInfo?.exifImageWidth?.toInt(),
         livePhotoVideoId = remote.livePhotoVideoId,
         ownerId = fastHash(remote.ownerId),
         exifInfo =
@@ -507,3 +507,19 @@ extension AssetsHelper on IsarCollection<Asset> {
     return where().anyOf(ids, (q, String e) => q.localIdEqualTo(e));
   }
 }
+
+/// Returns `true` if this [int] is flipped 90° clockwise
+bool isRotated90CW(int orientation) {
+  return [7,8,-90].contains(orientation);
+}
+
+/// Returns `true` if this [int] is flipped 270° clockwise
+bool isRotated270CW(int orientation) {
+  return [5,6,90].contains(orientation);
+}
+
+/// Returns `true` if this [Asset] is flipped 90° or 270° clockwise
+bool isFlipped(AssetResponseDto response) {
+  final int orientation = response.exifInfo?.orientation?.toInt() ?? 0;
+  return orientation != 0 && (isRotated90CW(orientation) || isRotated270CW(orientation));
+}