6 magic sugars that can make your Kotlin codebase happier #9

Sugar.kt

fun access(employee: Employee,
           contract: Contract): SafariBookAccess {
    return when (employee) {
        SENIOR_ENGINEER -> when (contract) {
            PROBATION -> NotGranted(AssertionError("Access not allowed on probation contract."))
            PERMANENT -> Granted(DateTime())
            CONTRACTOR -> Granted(DateTime())
        }
        REGULAR_ENGINEER -> when (contract) {
            PROBATION -> NotGranted(AssertionError("Access not allowed on probation contract."))
            PERMANENT -> Granted(DateTime())
            CONTRACTOR -> Blocked("Access blocked for $contract.")
        }
        JUNIOR_ENGINEER -> when (contract) {
            PROBATION -> NotGranted(AssertionError("Access not allowed on probation contract."))
            PERMANENT -> Blocked("Access blocked for $contract.")
            CONTRACTOR -> Blocked("Access blocked for $contract.")
        }
        else -> throw AssertionError()
    }
}