class.ilSkillRoot.php

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<?php

class ilSkillRoot extends ilSkillTreeNode
{
    public function __construct(int $a_id = 0)
    {
        parent::__construct($a_id);
        $this->setType("skrt");
    }

    public function delete(): void
    {
        $skrt_id = $this->getId();
        $skill_tree = $this->skill_service->internal()->repo()->getTreeRepo()->getTreeForNodeId($skrt_id);
        $childs = $skill_tree->getChildsByTypeFilter(
            $skrt_id,
            ["skll", "scat", "sktp", "sctp", "sktr"]
        );
        foreach ($childs as $node) {
            switch ($node["type"]) {
                case "skll":
                    $obj = new ilBasicSkill((int) $node["obj_id"]);
                    $obj->delete();
                    break;

                case "scat":
                    $obj = new ilSkillCategory((int) $node["obj_id"]);
                    $obj->delete();
                    break;

                case "sktp":
                    $obj = new ilBasicSkillTemplate((int) $node["obj_id"]);
                    $obj->delete();
                    break;

                case "sctp":
                    $obj = new ilSkillTemplateCategory((int) $node["obj_id"]);
                    $obj->delete();
                    break;

                case "sktr":
                    $obj = new ilSkillTemplateReference((int) $node["obj_id"]);
                    $obj->delete();
                    break;
            }
        }

        parent::delete();
    }
}