getNextId method
Implementation
int getNextId() {
var lastIdFile = File('$location/options/last_id');
if (lastIdFile.existsSync()) {
var result = int.parse(lastIdFile.readAsStringSync());
lastIdFile.writeAsStringSync((result + 1).toString());
return result + 1;
} else {
lastIdFile
..createSync(recursive: true)
..writeAsStringSync('1');
return 1;
}
}