show method

Implementation

void show(ToastrConfig config, BuildContext context) {
  // Get overlay from the provided context
  final overlay = Overlay.of(context);

  // Security validations
  if (!ToastrValidator.isValidConfig(config)) {
    ToastrValidator.logSecurityEvent(
      'INVALID_CONFIG',
      'Configuration failed validation',
    );
    throw ArgumentError('Invalid toastr configuration');
  }

  // Rate limiting check
  if (_shouldThrottleNotifications()) {
    ToastrValidator.logSecurityEvent('RATE_LIMIT', 'Too many notifications');
    return;
  }

  // Limit active notifications for security
  if (_activeToastrs.length >= ToastrSecurityConfig.maxActiveNotifications) {
    ToastrValidator.logSecurityEvent(
      'MAX_NOTIFICATIONS',
      'Maximum active notifications reached',
    );
    // Remove oldest notification
    _removeOldestToastr();
  }

  // Sanitize the configuration
  final secureConfig = _sanitizeConfig(config);

  // Check for duplicates
  if (secureConfig.preventDuplicates &&
      _duplicateKeys.contains(secureConfig.key)) {
    return;
  }

  final toastId = DateTime.now().millisecondsSinceEpoch.toString();

  late OverlayEntry overlayEntry;
  overlayEntry = OverlayEntry(
    builder: (overlayContext) => _buildPositionedToastr(
      secureConfig,
      () => _removeToastr(toastId),
      context,
    ),
  );

  _activeToastrs[toastId] = overlayEntry;
  if (secureConfig.preventDuplicates) {
    _duplicateKeys.add(secureConfig.key);
  }

  overlay.insert(overlayEntry);
  _notificationCount++;

  // Auto-remove after duration
  Future.delayed(secureConfig.duration, () {
    _removeToastr(toastId);
  });
}