GadgetRepo.php

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<?php
 
abstract class GadgetRepo {
 
    private static $instance;
 
    abstract public function getGadgetIds();
 
    abstract public function getGadget( $id );
 
    public function getStructuredList() {
        $list = [];
        foreach ( $this->getGadgetIds() as $id ) {
            try {
                $gadget = $this->getGadget( $id );
            } catch ( InvalidArgumentException $e ) {
                continue;
            }
            $list[$gadget->getCategory()][$gadget->getName()] = $gadget;
        }
 
        return $list;
    }
 
    public static function singleton() {
        if ( self::$instance === null ) {
            global $wgGadgetsRepoClass; // @todo use Config here
            self::$instance = new $wgGadgetsRepoClass();
        }
        return self::$instance;
    }
 
    public static function setSingleton( $repo = null ) {
        self::$instance = $repo;
    }
}