PageOwnerGatekeeper.php

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<?php
 
namespace Elgg\Router\Middleware;
 
use Elgg\Exceptions\Http\EntityNotFoundException;
use Elgg\Router\Route;
 
class PageOwnerGatekeeper {
    
    protected \ElggEntity $page_owner;
 
    public function __invoke(\Elgg\Request $request) {
        
        $route = $request->getHttpRequest()->getRoute();
        if (!$route instanceof Route) {
            return;
        }
        
        // force detection of page owner for legacy routes
        $route->setDefault('_detect_page_owner', true);
        
        $page_owner = $route->resolvePageOwner();
        if (!$page_owner instanceof \ElggEntity) {
            throw new EntityNotFoundException();
        }
        
        $this->page_owner = $page_owner;
        
        $this->assert($request, $route);
    }
    
    protected function assert(\Elgg\Request $request, Route $route): void {
        $this->assertPageOwner();
    }
    
    protected function assertPageOwner(): void {
        if (!empty($this->getType()) && $this->page_owner->getType() !== $this->getType()) {
            throw new EntityNotFoundException();
        }
        
        if (!empty($this->getSubtype()) && $this->page_owner->getSubtype() !== $this->getType()) {
            throw new EntityNotFoundException();
        }
        
        _elgg_services()->gatekeeper->assertAccessibleEntity($this->page_owner);
    }
    
    protected function getType(): string {
        return '';
    }
    
    protected function getSubtype(): string {
        return '';
    }
}