Function applyExpressionFields

packages/insomnia/src/konnect/expression-parser.ts:70–103

(route: KonnectRoute)

 * - The expression yields no usable fields — creating fallback requests would be misleading.
 */
export function applyExpressionFields(route: KonnectRoute): ApplyExpressionResult {
  if (!route.expression) {
    return { syncable: true, route };
  }

  if (/\btls\.sni\b/.test(route.expression)) {
    return {
      syncable: false,
      routeName: route.name ?? `Route ${route.id}`,
      reason: 'Expression route uses tls.sni matching — unsupported in Insomnia',
    };
  }

  const extracted = extractFieldsFromExpression(route.expression);

  if (!extracted.methods && !extracted.paths && !extracted.hosts && !extracted.headers) {
    return {
      syncable: false,
      routeName: route.name ?? `Route ${route.id}`,
      reason: 'Expression route — no extractable fields (method/path/host/header)',
    };
  }

  return {
    syncable: true,
    route: {
      ...route,
      methods: extracted.methods,
      paths: extracted.paths,
      hosts: extracted.hosts,
      headers: extracted.headers,
    },
  };
}