class.ilExcRepoObjAssignmentAccessInfo.php

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<?php

class ilExcRepoObjAssignmentAccessInfo implements ilExcRepoObjAssignmentAccessInfoInterface
{
    protected bool $is_granted;

    protected array $not_granted_reasons;

    protected ilLanguage $lng;
    protected ilAccessHandler $access;

    protected function __construct(bool $a_is_granted, array $a_not_granted_reasons)
    {
        global $DIC;

        $this->access = $DIC->access();
        $this->is_granted = $a_is_granted;
        $this->not_granted_reasons = $a_not_granted_reasons;

        $this->lng = $DIC->language();
    }


    public function isGranted(): bool
    {
        return $this->is_granted;
    }

    public function getNotGrantedReasons(): array
    {
        return $this->not_granted_reasons;
    }

    public static function getInfo(int $a_ref_id, int $a_user_id): self
    {
        global $DIC;

        $repo_obj_ass = ilExcRepoObjAssignment::getInstance();
        $lng = $DIC->language();
        $access = $DIC->access();

        // if this object is not assigned to any assignment, we do not deny the access
        $assignment_info = $repo_obj_ass->getAssignmentInfoOfObj($a_ref_id, $a_user_id);
        if (count($assignment_info) == 0) {
            return new self(true, []);
        }

        $granted = true;
        $reasons = [];
        foreach ($assignment_info as $i) {
            if (!$i->isUserSubmission()) {
                $has_write_permission = false;
                foreach ($i->getReadableRefIds() as $exc_ref_id) {
                    if ($access->checkAccessOfUser($a_user_id, "write", "", $exc_ref_id)) {
                        $has_write_permission = true;
                    }
                }
                if (!$has_write_permission) {
                    $granted = false;
                    $reasons[0] = $lng->txt("exc_obj_not_submitted_by_user");
                }
            }
        }

        return new self($granted, $reasons);
    }
}