/**
* Returns the *Singleton* instance of this class.
*
* @param AbsMenuPage $menuPage
*
* @return $this ::class The *Singleton* instance.
*/
public static function getInstance(AbsMenuPage $menuPage)
{
$class = get_called_class();
if (!isset(self::$instances[$menuPage->getMenuSlug()])) {
self::$instances[$menuPage->getMenuSlug()] = array();
}
if (!isset(self::$instances[$menuPage->getMenuSlug()][$class])) {
self::$instances[$menuPage->getMenuSlug()][$class] = new $class($menuPage);
}
return self::$instances[$menuPage->getMenuSlug()][$class];
}
/**
* Registers a menu page
*
* @param AbsMenuPage $menuPage The menu page instance to be registered
*
* @author Panagiotis Vagenas <*****@*****.**>
* @see WpMenuPages::$menuPages
* @since 1.0.0
*/
public function attachMenuPage(AbsMenuPage $menuPage)
{
if (isset($this->menuPages[$menuPage->getMenuSlug()])) {
user_error('A page with the slug "' . $menuPage->getMenuSlug() . '" is already registered');
}
$this->menuPages[$menuPage->getMenuSlug()] = $menuPage;
}
/**
* Each page instance should use this function to initialize options for her self
*
* @param AbsMenuPage $page A page to init options for
*
* @author Panagiotis Vagenas <*****@*****.**>
* @since 1.0.0
*/
public function maybeInitPageOptions(AbsMenuPage $page)
{
if (!isset($this->options[self::PAGE_OPT][$page->getMenuSlug()])) {
$this->options[self::PAGE_OPT][$page->getMenuSlug()] = [];
}
}
