toBoolOrNull function
Convert any dynamic value to bool or null safely.
Implementation
bool? toBoolOrNull(value) {
if (value == null) return null;
if (value is bool) return value;
if (value is int) return value == 0 ? false : true;
if (value is double) return value == 0 ? false : true;
if (value is String) {
if (value == "1" || value.toLowerCase() == "true") return true;
if (value == "0" || value.toLowerCase() == "false") return false;
}
return null;
}