Legacy Password Checker

PasswordVerifierLegacy.kt

class PasswordVerifierLegacy() {
 fun verify(password: String): Any {
   var count = 1
   var messages:MutableList<String> = mutableListOf()

   if (password.length < 8) messages.add("length less than 8")
   if (password.firstOrNull { it.isDigit() } == null) messages.add("no digits")
   if (password.firstOrNull { !it.isLetterOrDigit() } == null) messages.add("no regular characters")
   if (password.filter { it.isLetter() }.firstOrNull { it.isUpperCase() } == null) messages.add("no uppercase")
   if (password.filter { it.isLetter() }.firstOrNull { it.isLowerCase() } == null) messages.add("no lowercase")
   return object {
     val isValid = messages.count()<3
     val failedRulesCount = messages.count()
   }
 }
}