set user id as the current user in Joomla

Question

I have a userId - $uid.

I wanted to make this user as logged in to the s/m in joomla.

I've tried this -

$currentUser = new JUser($uid);

$mainframe = JFactory::getApplication('site');
$credentials = array();
$credentials['username'] = $currentUser->username;
$credentials['password'] = $currentUser->password; //this is the hashed password

//perform the login action
$mainframe->login($credentials);

$newuser = JFactory::getUser(); //this doesn't get updated to the new user ($uid) details

How can I make the user as the current user by using the uid itself?

Update: I just found that user can be loaded with JUser::load()

Trial 2-

$user = JUser::getInstance($uid);
$user->load($uid); //this should load the new user.

$newuser = JFactory::getUser(); //still i get the anonymous details here 
            //($newuser->id = 0)

As there is wp_set_current_user($uid); for wordpress user_load_by_name() in drupal, is there any similar function for joomla ? Please help.!!!

Thanks!

Answer 1

You can simply do this by using a core plugin...

//Will obtain user object - what the question author needed.
$user = JFactory::getUser($uid);

//Will authorize you as this user.
JPluginHelper::importPlugin('user');
$options = array();
$options['action'] = 'core.login.site';
$response->username = $user->username;
$result = $app->triggerEvent('onUserLogin', array((array)$response, $options));