[keycloak-user] An ability to evaluate/transform the template variables during the SAML/OpenID protocol mappers processing

Hello Guys, current email thread is inspired by the https://github.com/keycloak/keycloak/pull/5042 and the question for the community is: - what do you think if the Keycloak will have an ability to evaluate/transform the template variables during the SAML/OpenID protocol mappers processing ? Examples (please refer to the attached "snapshot-1.png" and "snapshot-2.png"): 1. "snapshot-1.png": ${firstName} ${lastName} => the simplest expression, the template variables will be evaluated into the real values of the user (in this case) properties => e.g.: "Serhii Shymkiv" (without quotes, of course) 2. "snapshot-2.png": Welcome back, #(${firstName} ${lastName}) ?: ${email} => almost the same expression but with additional logic which means that the value of the #(...) block will be used only if it is not blank (null or space symbols only) otherwise the expression to the right of the ?: operator will be evaluated => e.g.: "Welcome back, Serhii Shymkiv" e.g.: "Welcome back, sergey(a)shimkiv.com" Thank you for you time. -- Best regards, Serhii Shymkiv.