Add wrapper

web/packages/shared/file-metadata.ts

@@ -0,0 +1,16 @@
+import { decryptPublicMagicMetadata } from "@/media/file-metadata";
+import { EnteFile } from "@/new/photos/types/file";
+import ComlinkCryptoWorker from "@ente/shared/crypto";
+
+/**
+ * On-demand decrypt the public magic metadata for an {@link EnteFile} for code
+ * running on the main thread.
+ *
+ * It both modifies the given file object, and also returns the decrypted
+ * metadata.
+ */
+export const getPublicMagicMetadataMT = async (enteFile: EnteFile) =>
+    decryptPublicMagicMetadata(
+        enteFile,
+        (await ComlinkCryptoWorker.getInstance()).decryptMetadata,
+    );