___INFO___

{
  "type": "MACRO",
  "id": "cvt_temp_public_id",
  "version": 1,
  "securityGroups": [],
  "displayName": "DataNostro — GA4 Session ID",
  "description": "Extracts the GA4 session id from the _ga_<container> cookie. Useful for joining server events with GA4 sessions.",
  "containerContexts": ["SERVER"]
}


___TEMPLATE_PARAMETERS___

[
  {"type": "TEXT","name": "container_id","displayName": "GA4 Container ID","simpleValueType": true,"valueValidators": [{"type":"NON_EMPTY"}],"help": "Numeric part of G-XXXXXXXX (no G- prefix)."}
]


___SANDBOXED_JS_FOR_SERVER___

const getCookieValues = require("getCookieValues");

const cookie = getCookieValues("_ga_" + data.container_id);
if (!cookie || !cookie.length) return undefined;
const parts = cookie[0].split(".");
return parts.length >= 3 ? parts[2] : undefined;


___SERVER_PERMISSIONS___

[
  {"instance": {"key": {"publicId": "get_cookies"}, "param": [{"key": "cookieAccess","value": {"type": 1,"string": "any"}}]}}
]


___TESTS___

scenarios: []


___NOTES___

GA4 stores session id at index 2 of the _ga_<container> cookie value (dot-separated).