NYCPHP Meetup

[Gary Mort]

   I am putting together a SSO set of plugins for IIS using Windows user
   accounts.

   As such, I am trusting that any user who connects is a valid user and
   allowing them to logon.

   I have a system plugin which fires first, it checks to make sure we
   have a REMOTE_USER set, parses out the username from the domain[using
   either slash since Windows except either and lowercase the username].

   Then it checks to see if that user is already logged on, if so no
   reason to keep going. If not, and the override is set, it will check
   to see if the user exists, if the user doesn't exist it creates the
   user, and then logs them on[and of course there is an IIS logon module
   which returns success for REMOTE_USER's that exist in the user
   database].

   All good. The only issue I ran into was that the user lookup function
   keeps throwing a warning that no user was found[basically, anytime you
   use the


   Joomla API to look for a user, it generates a user error message


   when no user is found.  This makes sense when a user is logging on,


   it is USELESS when you are looking for a user for other reasons]


   Despite auto logging the user on, there still is displayed an error
   message that no
   user was found.

   To work around this, I used the following code:
   ----
   // save the current warning handler
   $warnHandlers = JERROR::getErrorHandling( E_WARNING );
   // ignore warnings because we expect some users to not exist
   JERROR::setErrorHandling(E_WARNING, 'ignore');
   // lookup user by name`
   $finduser =& JFactory::getUser($username);
   // reset the warning handler(s)
   foreach($warnHandlers as $mode) {
   JERROR::setErrorHandling(E_WARNING, $mode);
   }

   // if this user does not exist, create it
   if (!($finduser)) {
   // first we need to clear the error
   $userError = JError::getError( true );
   jimport('joomla.user.user');
   $newuser =& JUser::getInstance(0);
   --------

   This resets the warning handler to ignore, runs the lookup code, then
   resets it to whatever mode(s) where set before. Finally, if the user
   did not exist, I know there is an error at the top of the error queue
   about that, so I call getError with true set to pop the error and
   remove it.
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