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!7

concept AUser {
  S globalID = aLongGlobalID();
  S userName, email, realName;
  long lastSeen;
}

cmodule AssistantUsers > DynCRUD<AUser> {
  // API
  
  S userIDForEmail(S email) {
    ret getString globalID(conceptWhereIC(AUser, +email));
  }
  
  S userIDForName(S userName) {
    ret getString globalID(conceptWhereIC(AUser, +userName));
  }
  
  void updateLastSeen(S userID) {
    cset(conceptWhere(AUser, globalID := userID), lastSeen := now());
  }
  
  S registerUser(S email, S passwordHash) {
    if (userIDForEmail(email) != null)
      ret "User exists already";
    if (!isValidEmailAddress(email))
      ret "Not a valid e-mail address";
    if (!isMD5(passwordHash))
      ret "Internal error";
    AUser user = uniq_sync(AUser, +email);
    dm_call(dm_assistant_passwordsCRUD(), 'savePassword, user.globalID, passwordHash);
    ret "User registered!";
  }
}