/**
* Main Instance.
*
* Ensures only one instance of this class is loaded or can be loaded.
*
* @since 1.6
* @access public
* @static
* @param object|bool $caller The referrer class
* @return VAA_View_Admin_As_Compat|bool
*/
public static function get_instance($caller = false)
{
if (is_object($caller) && 'VAA_View_Admin_As' == get_class($caller)) {
if (is_null(self::$_instance)) {
self::$_instance = new self();
}
return self::$_instance;
}
return false;
}
/**
* Run the plugin!
* Check current user, load nessesary data and register all used hooks
*
* @since 0.1
* @access private
* @return void
*/
private function run()
{
// Not needed, the delete_user actions already remove all metadata
//add_action( 'remove_user_from_blog', array( $this->store, 'delete_user_meta' ) );
//add_action( 'wpmu_delete_user', array( $this->store, 'delete_user_meta' ) );
//add_action( 'wp_delete_user', array( $this->store, 'delete_user_meta' ) );
if (is_user_logged_in()) {
$this->store->set_nonce('view-admin-as');
// Get the current user
$this->store->set_curUser(wp_get_current_user());
// Get the current user session
if (function_exists('wp_get_session_token')) {
// WP 4.0+
$this->store->set_curUserSession((string) wp_get_session_token());
} else {
$cookie = wp_parse_auth_cookie('', 'logged_in');
if (!empty($cookie['token'])) {
$this->store->set_curUserSession((string) $cookie['token']);
} else {
// Fallback. This disables the use of multiple views in different sessions
$this->store->set_curUserSession($this->store->get_curUser()->ID);
}
}
/**
* Validate if the current user has access to the functionalities
*
* @since 0.1 Check if the current user had administrator rights (is_super_admin)
* Disable plugin functions for nedwork admin pages
* @since 1.4 Make sure we have a session for the current user
* @since 1.5.1 If a user has the correct capability (view_admin_as + edit_users) this plugin is also enabled, use with care
* Note that in network installations the non-admin user also needs the manage_network_users capability (of not the edit_users will return false)
* @since 1.5.3 Enable on network pages for superior admins
*/
if ((is_super_admin($this->store->get_curUser()->ID) || current_user_can('view_admin_as') && current_user_can('edit_users')) && (!is_network_admin() || VAA_API::is_superior_admin($this->store->get_curUser()->ID)) && $this->store->get_curUserSession() != '') {
$this->enable = true;
}
// Get database settings
$this->store->set_optionData(get_option($this->store->get_optionKey()));
// Get database settings of the current user
$this->store->set_userMeta(get_user_meta($this->store->get_curUser()->ID, $this->store->get_userMetaKey(), true));
$this->load_modules();
// Check if a database update is needed
VAA_View_Admin_As_Update::get_instance($this)->maybe_db_update();
if ($this->is_enabled()) {
// Fix some compatibility issues, more to come!
VAA_View_Admin_As_Compat::get_instance($this)->init();
$this->store->store_caps();
$this->store->store_roles();
$this->store->store_users();
$this->view->init();
$this->load_ui();
// Dúh..
add_action('admin_enqueue_scripts', array($this, 'enqueue_scripts'));
add_action('wp_enqueue_scripts', array($this, 'enqueue_scripts'));
add_filter('wp_die_handler', array($this, 'die_handler'));
/**
* Init is finished. Hook is used for other classes related to View Admin As
* @since 1.5
* @param object $this VAA_View_Admin_As
*/
do_action('vaa_view_admin_as_init', $this);
} else {
// Extra security check for non-admins who did something naughty or we're demoted to a lesser role
// If they have settings etc. we'll keep them in case they get promoted again
add_action('wp_login', array($this, 'reset_all_views'), 10, 2);
}
}
}