UserStatus.ceylon

shared abstract class UserStatus of online | idle | doNotDisturb | invisible | offline {

    shared static UserStatus|ParseException parse(String string) =>
            parseUserStatus(string) else ParseException("illegal format for UserStatus");

    shared new () {}
}

"A value representing online status for a [[User]]."
shared object online extends UserStatus() {
    string => "online";
}

"A value representing idle status for a [[User]]."
shared object idle extends UserStatus() {
    string => "idle";
}

"A value representing do-not-disturb status for a [[User]]."
shared object doNotDisturb extends UserStatus() {
    string => "dnd";
}

"A value representing invisible status for a [[User]]."
shared object invisible extends UserStatus() {
    string => "invisible";
}

"A value representing offline status for a [[User]]."
shared object offline extends UserStatus() {
    string => "offline";
}