PageOwnerService.php

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<?php

namespace Elgg\Page;

use Elgg\Database\EntityTable;
use Elgg\EventsService;
use Elgg\Exceptions\RangeException;
use Elgg\Http\Request;
use Elgg\Invoker;
use Elgg\Router\Route;

class PageOwnerService {

    protected $request;

    protected $entity_table;

    protected $events;

    protected $invoker;

    protected $page_owner_guid = 0;
    
    public function __construct(
        Request $request,
        EntityTable $entity_table,
        EventsService $events,
        Invoker $invoker
    ) {
        $this->request = $request;
        $this->entity_table = $entity_table;
        $this->events = $events;
        $this->invoker = $invoker;
        
        $this->page_owner_guid = $this->detectPageOwnerFromRoute();
    }
    
    protected function detectPageOwnerFromRoute(): int {
        $route = $this->request->getRoute();
        if (!$route instanceof Route) {
            return 0;
        }
        
        $page_owner = $route->resolvePageOwner();
        if (!$page_owner instanceof \ElggEntity) {
            return 0;
        }
        
        return $page_owner->guid;
    }
    
    public function setPageOwnerGuid(int $guid = 0) {
        if ($guid < 0) {
            throw new RangeException(__METHOD__ . ' requires a positive integer.');
        }
        
        $this->page_owner_guid = $guid;
    }
    
    public function getPageOwnerGuid() {
        return $this->page_owner_guid;
    }
    
    public function getPageOwnerEntity(): ?\ElggEntity {
        return $this->entity_table->get($this->getPageOwnerGuid());
    }
}