addRule method
Add rule.
Implementation
void addRule(NmTelecomL10n l10n) {
final value = selected;
if (value == null || value.isSystem) return;
final id = _uniqueId('response_rule', value.responseRules.map((item) => item.id));
final rule = NmResponseRule(
id: id,
name: l10n.cmdSetNewRuleName,
priority: value.responseRules.length,
channel: NmResponseChannel.ussd,
matcher: const NmResponseMatcher(mode: NmResponseMatchMode.contains, pattern: ''),
effects: const [NmResponseEffect(field: NmResponseField.balance, source: NmParameterValueSource.fullMatch)],
);
_update(value.copyWith(responseRules: [...value.responseRules, rule]));
}