What is the standard approach to construct an Architect expression that transforms a raw E.164 string like +14155551234 into (415) 555-1234? I am avoiding external HTTP calls for latency reasons.
My current attempt using nested substring and concat operations is brittle and fails on variable country code lengths. Is there a cleaner regex-based approach or a built-in formatting function available in the current expression engine?
What’s happening here is that the Architect expression engine lacks native regex capture groups or a dedicated phone formatting function. You cannot simply parse E.164 dynamically with variable country code lengths using built-in string helpers alone. The nested substring approach fails because it assumes a fixed offset. Since you are avoiding external HTTP calls for latency, you must rely on static string manipulation or pre-processing in your client-side SDK before passing data to Architect. In my Chrome extension projects, I handle this in the content script using JavaScript IntlTelInput logic before sending the formatted string to the API. If you must stay in Architect, you are limited to known country codes.
+ and country code using replace if the code is static.substring to isolate area code and subscriber number.-.For US/Canada (+1), use this expression:
concat("(", substring(replace(tostring(${data.phone}}, "+1", ""), 0, 3), ") ", substring(replace(tostring(${data.phone}}, "+1", ""), 3, 3), "-", substring(replace(tostring(${data.phone}}, "+1", ""), 6, 4))
This is brittle. Bold truth: Architect is not a data transformation layer. If you support multiple countries, do this in your CRM overlay or Genesys Cloud API call before the flow triggers. The expression engine will choke on international variations. Keep formatting logic in your client_app_sdk or a microservice. Do not fight the expression parser.