ProxySpecialPage.php

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<?php
abstract class ProxySpecialPage extends SpecialPage {
    private $target = null;
 
    abstract protected function getTargetPage();
 
    private function init() {
        if ( $this->target === null ) {
            $this->target = $this->getTargetPage();
        }
    }
 
    public function __call( $method, $args ) {
        $this->init();
        return call_user_func_array( [ $this->target, $method ], $args );
    }
 
    function getName() {
        $this->init();
        return $this->target->getName();
    }
 
    function getPageTitle( $subpage = false ) {
        $this->init();
        return $this->target->getPageTitle( $subpage );
    }
 
    function getLocalName() {
        $this->init();
        return $this->target->getLocalName();
    }
 
    function getRestriction() {
        $this->init();
        return $this->target->getRestriction();
    }
 
    function isListed() {
        $this->init();
        return $this->target->isListed();
    }
 
    function setListed( $listed ) {
        $this->init();
        return $this->target->setListed( $listed );
    }
 
    function listed( $x = null ) {
        $this->init();
        return $this->target->listed( $x );
    }
 
    public function isIncludable() {
        $this->init();
        return $this->target->isIncludable();
    }
 
    function including( $x = null ) {
        $this->init();
        return $this->target->including( $x );
    }
 
    public function isRestricted() {
        $this->init();
        return $this->target->isRestricted();
    }
 
    public function userCanExecute( User $user ) {
        $this->init();
        return $this->target->userCanExecute( $user );
    }
 
    function displayRestrictionError() {
        $this->init();
        $this->target->displayRestrictionError();
    }
 
    public function checkPermissions() {
        $this->init();
        $this->target->checkPermissions();
    }
 
    protected function beforeExecute( $subPage ) {
        $this->init();
        $this->target->beforeExecute( $subPage );
    }
 
    protected function afterExecute( $subPage ) {
        $this->init();
        $this->target->afterExecute( $subPage );
    }
 
    public function execute( $subPage ) {
        $this->init();
        $this->target->execute( $subPage );
    }
 
    function getDescription() {
        $this->init();
        return $this->target->getDescription();
    }
 
    public function setContext( $context ) {
        $this->init();
        $this->target->setContext( $context );
        parent::setContext( $context );
    }
 
    protected function getRobotPolicy() {
        $this->init();
        return $this->target->getRobotPolicy();
    }
 
    protected function getGroupName() {
        $this->init();
        return $this->target->getGroupName();
    }
}