class.ilClientNodeDAV.php

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<?php

use Sabre\DAV\Exception\BadRequest;
use Sabre\DAV\Exception\Forbidden;
use Sabre\DAV\Exception\NotFound;

class ilClientNodeDAV implements Sabre\DAV\ICollection
{
    protected $repo_helper;

    protected $name_of_repository_root;
    
    public function __construct(string $client_name, ilWebDAVRepositoryHelper $repo_helper, ilWebDAVObjDAVHelper $dav_helper)
    {
        global $DIC;
        
        $this->repo_helper = $repo_helper;
        $this->dav_helper = $dav_helper;
        $this->client_name = $client_name;
        $this->name_of_repository_root = 'ILIAS';
    }

    public function setName($name)
    {
        throw new Forbidden("You cant change the client name");
    }

    public function getChildren()
    {
        return array($this->getRepositoryRootPoint());
    }

    public function getName()
    {
        return $this->client_name;
    }

    public function getLastModified()
    {
        return strtotime('2000-01-01');
    }

    public function getChild($name)
    {
        if ($name == $this->name_of_repository_root) {
            return $this->getRepositoryRootPoint();
        } else {
            return $this->getMountPointByReference($name);
        }
    }

    protected function getMountPointByReference($name)
    {
        $ref_id = $this->getRefIdFromName($name);
        
        if ($ref_id > 0) {
            if ($this->repo_helper->checkAccess('read', $ref_id)) {
                return $this->dav_helper->createDAVObjectForRefId($ref_id);
            }

            throw new Forbidden("No read permission for object with reference ID $ref_id ");
        }
        
        throw new BadRequest("Invalid parameter $name");
    }

    protected function getRepositoryRootPoint()
    {
        if ($this->repo_helper->checkAccess('read', ROOT_FOLDER_ID)) {
            return new ilObjRepositoryRootDAV($this->name_of_repository_root, $this->repo_helper, $this->dav_helper);
        }
        throw new Forbidden("No read permission for ilias repository root");
    }
    
    public function childExists($name)
    {
        if ($name == $this->name_of_repository_root) {
            return true;
        }
        
        $ref_id = $this->getRefIdFromName($name);
        if ($ref_id > 0) {
            return $this->repo_helper->objectWithRefIdExists($ref_id) && $this->repo_helper->checkAccess('read', $ref_id);
        }
        return false;
    }

    public function getRefIdFromName($name)
    {
        $ref_parts = explode('_', $name);
        if (count($ref_parts) == 2) {
            $ref_id = (int) $ref_parts[1];
            return $this->checkIfRefIdIsValid($ref_id);
        }
        
        return 0;
    }

    protected function checkIfRefIdIsValid($ref_id)
    {
        if ($ref_id > 0 && $this->repo_helper->objectWithRefIdExists($ref_id) && $this->dav_helper->isDAVableObject($ref_id, true, false)) {
            return $ref_id;
        }
    }

    public function createDirectory($name)
    {
        throw new Forbidden();
    }

    public function delete()
    {
        throw new Forbidden();
    }

    public function createFile($name, $data = null)
    {
        throw new Forbidden();
    }
}