class.ilObjLearningModuleGUI.php

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<?php

class ilObjLearningModuleGUI extends ilObjContentObjectGUI
{
    protected ilLMTree $lm_tree;

    public function __construct(
        $a_data,
        int $a_id = 0,
        bool $a_call_by_reference = true,
        bool $a_prepare_output = true
    ) {
        $this->type = "lm";

        parent::__construct($a_data, $a_id, $a_call_by_reference, $a_prepare_output);

        # BETTER DO IT HERE THAN IN PARENT CLASS ( PROBLEMS FOR import, create)
        $this->assignObject();

        // SAME REASON
        if ($a_id != 0) {
            $this->lm_tree = $this->object->getLMTree();
        }
    }

    protected function assignObject(): void
    {
        $this->link_params = "ref_id=" . $this->ref_id;
        $this->object = new ilObjLearningModule($this->id, true);
        $lm = $this->object;
        $this->lm = $lm;
    }

    public function view(): void
    {
        if (strtolower($this->edit_request->getBaseClass()) == "iladministrationgui") {
            $this->prepareOutput();
            parent::viewObject();
        } else {
            $this->properties();
        }
    }
}