verifyUploadMetadata method

Future<bool> verifyUploadMetadata(String fileUuid, File originalFile)

Verify uploaded file using metadata hash (no download needed).

Implementation

Future<bool> verifyUploadMetadata(String fileUuid, File originalFile) async {
  api.log('Verifying upload using metadata check...');

  print('   📊 Hashing local file...');
  final localHash = await crypto.hashFile(originalFile);
  api.log('   Local SHA-512: $localHash');

  print('   📋 Fetching metadata from server...');
  final metadata = await getFileMetadata(fileUuid);
  final metaStr = await crypto.tryDecrypt(metadata['metadata'], masterKeys);
  final meta = json.decode(metaStr);

  final serverHash = meta['hash'] as String?;

  if (serverHash == null || serverHash.isEmpty) {
    print('   ⚠️  No hash in metadata (empty file?)');
    return await originalFile.length() == 0;
  }

  api.log('   Server SHA-512: $serverHash');

  final match = localHash == serverHash;

  if (match) {
    print('   ✅ Verification successful - hashes match!');
  } else {
    print('   ❌ Verification failed - hashes differ!');
    print('      Local:  $localHash');
    print('      Server: $serverHash');
  }

  return match;
}