localFile function
Implementation
Future<File> localFile(String name, [String? doc]) async {
var p0 = File('${await localPath}/${name}');
if (doc != null) return p0 = File('${await localPath}/${name}');
if (await p0.exists()) return p0;
final p1 =
File('${await localPath}/${name.replaceAll(RegExp(r'[^\w]+'), '_')}.img');
if (await p1.exists() || useOldImgEncoding) return p1;
return File(
'${await localPath}/${name.replaceAll(RegExp(r'[^\w]+'), '_')}.maybe.jpg');
}