PageRetrieval.php

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<?php
 
declare(strict_types=1);
 
namespace ILIAS\LearningModule\Media;
 
use Generator;
use ilCtrl;
use ilLMPageObject;
use ilLMPageObjectGUI;
use ILIAS\MediaObjects\OverviewGUI\SubObjectRetrieval;
 
class PageRetrieval implements SubObjectRetrieval
{
    public function __construct(
        protected int $obj_id,
        protected ilCtrl $ctrl
    ) {
    }
 
    public function getPossibleTypes(): Generator
    {
        yield 'lm:pg';
    }
 
    public function getAllIDsForType(string $type): Generator
    {
        if ($type !== 'lm:pg') {
            return;
        }
        foreach (ilLMPageObject::getPageList($this->obj_id) as $page) {
            yield (int) $page['obj_id'];
        }
    }
 
    public function getLinkToSubObject(string $type, int $id): string
    {
        if ($type !== 'lm:pg') {
            return '';
        }
        $this->ctrl->setParameterByClass(ilLMPageObjectGUI::class, 'obj_id', $id);
        $link = $this->ctrl->getLinkTargetByClass(ilLMPageObjectGUI::class, 'edit');
        $this->ctrl->clearParameterByClass(ilLMPageObjectGUI::class, 'obj_id');
        return $link;
    }
 
    public function getTitleOfSubObject(string $type, int $id): string
    {
        if ($type !== 'lm:pg') {
            return '';
        }
        return ilLMPageObject::_lookupTitle($id);
    }
}